/**************************************************************************
 *
 * Copyright 2013-2014 RAD Game Tools and Valve Software
 * Copyright 2010-2014 Rich Geldreich and Tenacious Software LLC
 * Copyright 2016 Martin Raiber
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 **************************************************************************/
#include "miniz.h"

#ifndef MINIZ_NO_ARCHIVE_APIS

#ifdef __cplusplus
extern "C" {
#endif

/* ------------------- .ZIP archive reading */

#ifdef MINIZ_NO_STDIO
#define MZ_FILE void *
#else
#include <sys/stat.h>

#if defined(_MSC_VER) || defined(__MINGW64__)
static FILE *mz_fopen(const char *pFilename, const char *pMode)
{
    FILE *pFile = NULL;
    fopen_s(&pFile, pFilename, pMode);
    return pFile;
}
static FILE *mz_freopen(const char *pPath, const char *pMode, FILE *pStream)
{
    FILE *pFile = NULL;
    if (freopen_s(&pFile, pPath, pMode, pStream))
        return NULL;
    return pFile;
}
#ifndef MINIZ_NO_TIME
#include <sys/utime.h>
#endif
#define MZ_FOPEN mz_fopen
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#define MZ_FTELL64 _ftelli64
#define MZ_FSEEK64 _fseeki64
#define MZ_FILE_STAT_STRUCT _stat64
#define MZ_FILE_STAT _stat64
#define MZ_FFLUSH fflush
#define MZ_FREOPEN mz_freopen
#define MZ_DELETE_FILE remove
#elif defined(__MINGW32__)
#ifndef MINIZ_NO_TIME
#include <sys/utime.h>
#endif
#define MZ_FOPEN(f, m) fopen(f, m)
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#define MZ_FTELL64 ftello64
#define MZ_FSEEK64 fseeko64
#define MZ_FILE_STAT_STRUCT _stat
#define MZ_FILE_STAT _stat
#define MZ_FFLUSH fflush
#define MZ_FREOPEN(f, m, s) freopen(f, m, s)
#define MZ_DELETE_FILE remove
#elif defined(__TINYC__)
#ifndef MINIZ_NO_TIME
#include <sys/utime.h>
#endif
#define MZ_FOPEN(f, m) fopen(f, m)
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#define MZ_FTELL64 ftell
#define MZ_FSEEK64 fseek
#define MZ_FILE_STAT_STRUCT stat
#define MZ_FILE_STAT stat
#define MZ_FFLUSH fflush
#define MZ_FREOPEN(f, m, s) freopen(f, m, s)
#define MZ_DELETE_FILE remove
#elif defined(__USE_LARGEFILE64) /* gcc, clang */
#ifndef MINIZ_NO_TIME
#include <utime.h>
#endif
#define MZ_FOPEN(f, m) fopen64(f, m)
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#define MZ_FTELL64 ftello64
#define MZ_FSEEK64 fseeko64
#define MZ_FILE_STAT_STRUCT stat64
#define MZ_FILE_STAT stat64
#define MZ_FFLUSH fflush
#define MZ_FREOPEN(p, m, s) freopen64(p, m, s)
#define MZ_DELETE_FILE remove
#elif defined(__APPLE__)
#ifndef MINIZ_NO_TIME
#include <utime.h>
#endif
#define MZ_FOPEN(f, m) fopen(f, m)
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#define MZ_FTELL64 ftello
#define MZ_FSEEK64 fseeko
#define MZ_FILE_STAT_STRUCT stat
#define MZ_FILE_STAT stat
#define MZ_FFLUSH fflush
#define MZ_FREOPEN(p, m, s) freopen(p, m, s)
#define MZ_DELETE_FILE remove

#else
//#pragma message("Using fopen, ftello, fseeko, stat() etc. path for file I/O - this path may not support large files.")
#ifndef MINIZ_NO_TIME
#include <utime.h>
#endif
#define MZ_FOPEN(f, m) fopen(f, m)
#define MZ_FCLOSE fclose
#define MZ_FREAD fread
#define MZ_FWRITE fwrite
#ifdef __STRICT_ANSI__
#define MZ_FTELL64 ftell
#define MZ_FSEEK64 fseek
#else
#define MZ_FTELL64 ftello
#define MZ_FSEEK64 fseeko
#endif
#define MZ_FILE_STAT_STRUCT stat
#define MZ_FILE_STAT stat
#define MZ_FFLUSH fflush
#define MZ_FREOPEN(f, m, s) freopen(f, m, s)
#define MZ_DELETE_FILE remove
#endif /* #ifdef _MSC_VER */
#endif /* #ifdef MINIZ_NO_STDIO */

#define MZ_TOLOWER(c) ((((c) >= 'A') && ((c) <= 'Z')) ? ((c) - 'A' + 'a') : (c))

/* Various ZIP archive enums. To completely avoid cross platform compiler alignment and platform endian issues, miniz.c doesn't use structs for any of this stuff. */
enum
{
    /* ZIP archive identifiers and record sizes */
    MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG = 0x06054b50,
    MZ_ZIP_CENTRAL_DIR_HEADER_SIG = 0x02014b50,
    MZ_ZIP_LOCAL_DIR_HEADER_SIG = 0x04034b50,
    MZ_ZIP_LOCAL_DIR_HEADER_SIZE = 30,
    MZ_ZIP_CENTRAL_DIR_HEADER_SIZE = 46,
    MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE = 22,

    /* ZIP64 archive identifier and record sizes */
    MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG = 0x06064b50,
    MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG = 0x07064b50,
    MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE = 56,
    MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE = 20,
    MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID = 0x0001,
    MZ_ZIP_DATA_DESCRIPTOR_ID = 0x08074b50,
    MZ_ZIP_DATA_DESCRIPTER_SIZE64 = 24,
    MZ_ZIP_DATA_DESCRIPTER_SIZE32 = 16,

    /* Central directory header record offsets */
    MZ_ZIP_CDH_SIG_OFS = 0,
    MZ_ZIP_CDH_VERSION_MADE_BY_OFS = 4,
    MZ_ZIP_CDH_VERSION_NEEDED_OFS = 6,
    MZ_ZIP_CDH_BIT_FLAG_OFS = 8,
    MZ_ZIP_CDH_METHOD_OFS = 10,
    MZ_ZIP_CDH_FILE_TIME_OFS = 12,
    MZ_ZIP_CDH_FILE_DATE_OFS = 14,
    MZ_ZIP_CDH_CRC32_OFS = 16,
    MZ_ZIP_CDH_COMPRESSED_SIZE_OFS = 20,
    MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS = 24,
    MZ_ZIP_CDH_FILENAME_LEN_OFS = 28,
    MZ_ZIP_CDH_EXTRA_LEN_OFS = 30,
    MZ_ZIP_CDH_COMMENT_LEN_OFS = 32,
    MZ_ZIP_CDH_DISK_START_OFS = 34,
    MZ_ZIP_CDH_INTERNAL_ATTR_OFS = 36,
    MZ_ZIP_CDH_EXTERNAL_ATTR_OFS = 38,
    MZ_ZIP_CDH_LOCAL_HEADER_OFS = 42,

    /* Local directory header offsets */
    MZ_ZIP_LDH_SIG_OFS = 0,
    MZ_ZIP_LDH_VERSION_NEEDED_OFS = 4,
    MZ_ZIP_LDH_BIT_FLAG_OFS = 6,
    MZ_ZIP_LDH_METHOD_OFS = 8,
    MZ_ZIP_LDH_FILE_TIME_OFS = 10,
    MZ_ZIP_LDH_FILE_DATE_OFS = 12,
    MZ_ZIP_LDH_CRC32_OFS = 14,
    MZ_ZIP_LDH_COMPRESSED_SIZE_OFS = 18,
    MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS = 22,
    MZ_ZIP_LDH_FILENAME_LEN_OFS = 26,
    MZ_ZIP_LDH_EXTRA_LEN_OFS = 28,
    MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR = 1 << 3,

    /* End of central directory offsets */
    MZ_ZIP_ECDH_SIG_OFS = 0,
    MZ_ZIP_ECDH_NUM_THIS_DISK_OFS = 4,
    MZ_ZIP_ECDH_NUM_DISK_CDIR_OFS = 6,
    MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS = 8,
    MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS = 10,
    MZ_ZIP_ECDH_CDIR_SIZE_OFS = 12,
    MZ_ZIP_ECDH_CDIR_OFS_OFS = 16,
    MZ_ZIP_ECDH_COMMENT_SIZE_OFS = 20,

    /* ZIP64 End of central directory locator offsets */
    MZ_ZIP64_ECDL_SIG_OFS = 0,                    /* 4 bytes */
    MZ_ZIP64_ECDL_NUM_DISK_CDIR_OFS = 4,          /* 4 bytes */
    MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS = 8,  /* 8 bytes */
    MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS = 16, /* 4 bytes */

    /* ZIP64 End of central directory header offsets */
    MZ_ZIP64_ECDH_SIG_OFS = 0,                       /* 4 bytes */
    MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS = 4,            /* 8 bytes */
    MZ_ZIP64_ECDH_VERSION_MADE_BY_OFS = 12,          /* 2 bytes */
    MZ_ZIP64_ECDH_VERSION_NEEDED_OFS = 14,           /* 2 bytes */
    MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS = 16,            /* 4 bytes */
    MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS = 20,            /* 4 bytes */
    MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS = 24, /* 8 bytes */
    MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS = 32,       /* 8 bytes */
    MZ_ZIP64_ECDH_CDIR_SIZE_OFS = 40,                /* 8 bytes */
    MZ_ZIP64_ECDH_CDIR_OFS_OFS = 48,                 /* 8 bytes */
    MZ_ZIP_VERSION_MADE_BY_DOS_FILESYSTEM_ID = 0,
    MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG = 0x10,
    MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED = 1,
    MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG = 32,
    MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION = 64,
    MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED = 8192,
    MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8 = 1 << 11
};

typedef struct
{
    void *m_p;
    size_t m_size, m_capacity;
    mz_uint m_element_size;
} mz_zip_array;

struct mz_zip_internal_state_tag
{
    mz_zip_array m_central_dir;
    mz_zip_array m_central_dir_offsets;
    mz_zip_array m_sorted_central_dir_offsets;

    /* The flags passed in when the archive is initially opened. */
    uint32_t m_init_flags;

    /* MZ_TRUE if the archive has a zip64 end of central directory headers, etc. */
    mz_bool m_zip64;

    /* MZ_TRUE if we found zip64 extended info in the central directory (m_zip64 will also be slammed to true too, even if we didn't find a zip64 end of central dir header, etc.) */
    mz_bool m_zip64_has_extended_info_fields;

    /* These fields are used by the file, FILE, memory, and memory/heap read/write helpers. */
    MZ_FILE *m_pFile;
    mz_uint64 m_file_archive_start_ofs;

    void *m_pMem;
    size_t m_mem_size;
    size_t m_mem_capacity;
};

#define MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(array_ptr, element_size) (array_ptr)->m_element_size = element_size

#if defined(DEBUG) || defined(_DEBUG)
static MZ_FORCEINLINE mz_uint mz_zip_array_range_check(const mz_zip_array *pArray, mz_uint index)
{
    MZ_ASSERT(index < pArray->m_size);
    return index;
}
#define MZ_ZIP_ARRAY_ELEMENT(array_ptr, element_type, index) ((element_type *)((array_ptr)->m_p))[mz_zip_array_range_check(array_ptr, index)]
#else
#define MZ_ZIP_ARRAY_ELEMENT(array_ptr, element_type, index) ((element_type *)((array_ptr)->m_p))[index]
#endif

static MZ_FORCEINLINE void mz_zip_array_init(mz_zip_array *pArray, mz_uint32 element_size)
{
    memset(pArray, 0, sizeof(mz_zip_array));
    pArray->m_element_size = element_size;
}

static MZ_FORCEINLINE void mz_zip_array_clear(mz_zip_archive *pZip, mz_zip_array *pArray)
{
    pZip->m_pFree(pZip->m_pAlloc_opaque, pArray->m_p);
    memset(pArray, 0, sizeof(mz_zip_array));
}

static mz_bool mz_zip_array_ensure_capacity(mz_zip_archive *pZip, mz_zip_array *pArray, size_t min_new_capacity, mz_uint growing)
{
    void *pNew_p;
    size_t new_capacity = min_new_capacity;
    MZ_ASSERT(pArray->m_element_size);
    if (pArray->m_capacity >= min_new_capacity)
        return MZ_TRUE;
    if (growing)
    {
        new_capacity = MZ_MAX(1, pArray->m_capacity);
        while (new_capacity < min_new_capacity)
            new_capacity *= 2;
    }
    if (NULL == (pNew_p = pZip->m_pRealloc(pZip->m_pAlloc_opaque, pArray->m_p, pArray->m_element_size, new_capacity)))
        return MZ_FALSE;
    pArray->m_p = pNew_p;
    pArray->m_capacity = new_capacity;
    return MZ_TRUE;
}

static MZ_FORCEINLINE mz_bool mz_zip_array_reserve(mz_zip_archive *pZip, mz_zip_array *pArray, size_t new_capacity, mz_uint growing)
{
    if (new_capacity > pArray->m_capacity)
    {
        if (!mz_zip_array_ensure_capacity(pZip, pArray, new_capacity, growing))
            return MZ_FALSE;
    }
    return MZ_TRUE;
}

static MZ_FORCEINLINE mz_bool mz_zip_array_resize(mz_zip_archive *pZip, mz_zip_array *pArray, size_t new_size, mz_uint growing)
{
    if (new_size > pArray->m_capacity)
    {
        if (!mz_zip_array_ensure_capacity(pZip, pArray, new_size, growing))
            return MZ_FALSE;
    }
    pArray->m_size = new_size;
    return MZ_TRUE;
}

static MZ_FORCEINLINE mz_bool mz_zip_array_ensure_room(mz_zip_archive *pZip, mz_zip_array *pArray, size_t n)
{
    return mz_zip_array_reserve(pZip, pArray, pArray->m_size + n, MZ_TRUE);
}

static MZ_FORCEINLINE mz_bool mz_zip_array_push_back(mz_zip_archive *pZip, mz_zip_array *pArray, const void *pElements, size_t n)
{
    size_t orig_size = pArray->m_size;
    if (!mz_zip_array_resize(pZip, pArray, orig_size + n, MZ_TRUE))
        return MZ_FALSE;
    if (n > 0)
        memcpy((mz_uint8 *)pArray->m_p + orig_size * pArray->m_element_size, pElements, n * pArray->m_element_size);
    return MZ_TRUE;
}

#ifndef MINIZ_NO_TIME
static MZ_TIME_T mz_zip_dos_to_time_t(int dos_time, int dos_date)
{
    struct tm tm;
    memset(&tm, 0, sizeof(tm));
    tm.tm_isdst = -1;
    tm.tm_year = ((dos_date >> 9) & 127) + 1980 - 1900;
    tm.tm_mon = ((dos_date >> 5) & 15) - 1;
    tm.tm_mday = dos_date & 31;
    tm.tm_hour = (dos_time >> 11) & 31;
    tm.tm_min = (dos_time >> 5) & 63;
    tm.tm_sec = (dos_time << 1) & 62;
    return mktime(&tm);
}

#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
static void mz_zip_time_t_to_dos_time(MZ_TIME_T time, mz_uint16 *pDOS_time, mz_uint16 *pDOS_date)
{
#ifdef _MSC_VER
    struct tm tm_struct;
    struct tm *tm = &tm_struct;
    errno_t err = localtime_s(tm, &time);
    if (err)
    {
        *pDOS_date = 0;
        *pDOS_time = 0;
        return;
    }
#else
    struct tm *tm = localtime(&time);
#endif /* #ifdef _MSC_VER */

    *pDOS_time = (mz_uint16)(((tm->tm_hour) << 11) + ((tm->tm_min) << 5) + ((tm->tm_sec) >> 1));
    *pDOS_date = (mz_uint16)(((tm->tm_year + 1900 - 1980) << 9) + ((tm->tm_mon + 1) << 5) + tm->tm_mday);
}
#endif /* MINIZ_NO_ARCHIVE_WRITING_APIS */

#ifndef MINIZ_NO_STDIO
#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
static mz_bool mz_zip_get_file_modified_time(const char *pFilename, MZ_TIME_T *pTime)
{
    struct MZ_FILE_STAT_STRUCT file_stat;

    /* On Linux with x86 glibc, this call will fail on large files (I think >= 0x80000000 bytes) unless you compiled with _LARGEFILE64_SOURCE. Argh. */
    if (MZ_FILE_STAT(pFilename, &file_stat) != 0)
        return MZ_FALSE;

    *pTime = file_stat.st_mtime;

    return MZ_TRUE;
}
#endif /* #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS*/

static mz_bool mz_zip_set_file_times(const char *pFilename, MZ_TIME_T access_time, MZ_TIME_T modified_time)
{
    struct utimbuf t;

    memset(&t, 0, sizeof(t));
    t.actime = access_time;
    t.modtime = modified_time;

    return !utime(pFilename, &t);
}
#endif /* #ifndef MINIZ_NO_STDIO */
#endif /* #ifndef MINIZ_NO_TIME */

static MZ_FORCEINLINE mz_bool mz_zip_set_error(mz_zip_archive *pZip, mz_zip_error err_num)
{
    if (pZip)
        pZip->m_last_error = err_num;
    return MZ_FALSE;
}

static mz_bool mz_zip_reader_init_internal(mz_zip_archive *pZip, mz_uint flags)
{
    (void)flags;
    if ((!pZip) || (pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_INVALID))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!pZip->m_pAlloc)
        pZip->m_pAlloc = miniz_def_alloc_func;
    if (!pZip->m_pFree)
        pZip->m_pFree = miniz_def_free_func;
    if (!pZip->m_pRealloc)
        pZip->m_pRealloc = miniz_def_realloc_func;

    pZip->m_archive_size = 0;
    pZip->m_central_directory_file_ofs = 0;
    pZip->m_total_files = 0;
    pZip->m_last_error = MZ_ZIP_NO_ERROR;

    if (NULL == (pZip->m_pState = (mz_zip_internal_state *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_internal_state))))
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    memset(pZip->m_pState, 0, sizeof(mz_zip_internal_state));
    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir, sizeof(mz_uint8));
    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir_offsets, sizeof(mz_uint32));
    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_sorted_central_dir_offsets, sizeof(mz_uint32));
    pZip->m_pState->m_init_flags = flags;
    pZip->m_pState->m_zip64 = MZ_FALSE;
    pZip->m_pState->m_zip64_has_extended_info_fields = MZ_FALSE;

    pZip->m_zip_mode = MZ_ZIP_MODE_READING;

    return MZ_TRUE;
}

static MZ_FORCEINLINE mz_bool mz_zip_reader_filename_less(const mz_zip_array *pCentral_dir_array, const mz_zip_array *pCentral_dir_offsets, mz_uint l_index, mz_uint r_index)
{
    const mz_uint8 *pL = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, l_index)), *pE;
    const mz_uint8 *pR = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, r_index));
    mz_uint l_len = MZ_READ_LE16(pL + MZ_ZIP_CDH_FILENAME_LEN_OFS), r_len = MZ_READ_LE16(pR + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    mz_uint8 l = 0, r = 0;
    pL += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE;
    pR += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE;
    pE = pL + MZ_MIN(l_len, r_len);
    while (pL < pE)
    {
        if ((l = MZ_TOLOWER(*pL)) != (r = MZ_TOLOWER(*pR)))
            break;
        pL++;
        pR++;
    }
    return (pL == pE) ? (l_len < r_len) : (l < r);
}

#define MZ_SWAP_UINT32(a, b) \
    do                       \
    {                        \
        mz_uint32 t = a;     \
        a = b;               \
        b = t;               \
    }                        \
    MZ_MACRO_END

/* Heap sort of lowercased filenames, used to help accelerate plain central directory searches by mz_zip_reader_locate_file(). (Could also use qsort(), but it could allocate memory.) */
static void mz_zip_reader_sort_central_dir_offsets_by_filename(mz_zip_archive *pZip)
{
    mz_zip_internal_state *pState = pZip->m_pState;
    const mz_zip_array *pCentral_dir_offsets = &pState->m_central_dir_offsets;
    const mz_zip_array *pCentral_dir = &pState->m_central_dir;
    mz_uint32 *pIndices;
    mz_uint32 start, end;
    const mz_uint32 size = pZip->m_total_files;

    if (size <= 1U)
        return;

    pIndices = &MZ_ZIP_ARRAY_ELEMENT(&pState->m_sorted_central_dir_offsets, mz_uint32, 0);

    start = (size - 2U) >> 1U;
    for (;;)
    {
        mz_uint64 child, root = start;
        for (;;)
        {
            if ((child = (root << 1U) + 1U) >= size)
                break;
            child += (((child + 1U) < size) && (mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[child], pIndices[child + 1U])));
            if (!mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[root], pIndices[child]))
                break;
            MZ_SWAP_UINT32(pIndices[root], pIndices[child]);
            root = child;
        }
        if (!start)
            break;
        start--;
    }

    end = size - 1;
    while (end > 0)
    {
        mz_uint64 child, root = 0;
        MZ_SWAP_UINT32(pIndices[end], pIndices[0]);
        for (;;)
        {
            if ((child = (root << 1U) + 1U) >= end)
                break;
            child += (((child + 1U) < end) && mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[child], pIndices[child + 1U]));
            if (!mz_zip_reader_filename_less(pCentral_dir, pCentral_dir_offsets, pIndices[root], pIndices[child]))
                break;
            MZ_SWAP_UINT32(pIndices[root], pIndices[child]);
            root = child;
        }
        end--;
    }
}

static mz_bool mz_zip_reader_locate_header_sig(mz_zip_archive *pZip, mz_uint32 record_sig, mz_uint32 record_size, mz_int64 *pOfs)
{
    mz_int64 cur_file_ofs;
    mz_uint32 buf_u32[4096 / sizeof(mz_uint32)];
    mz_uint8 *pBuf = (mz_uint8 *)buf_u32;

    /* Basic sanity checks - reject files which are too small */
    if (pZip->m_archive_size < record_size)
        return MZ_FALSE;

    /* Find the record by scanning the file from the end towards the beginning. */
    cur_file_ofs = MZ_MAX((mz_int64)pZip->m_archive_size - (mz_int64)sizeof(buf_u32), 0);
    for (;;)
    {
        int i, n = (int)MZ_MIN(sizeof(buf_u32), pZip->m_archive_size - cur_file_ofs);

        if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, n) != (mz_uint)n)
            return MZ_FALSE;

        for (i = n - 4; i >= 0; --i)
        {
            mz_uint s = MZ_READ_LE32(pBuf + i);
            if (s == record_sig)
            {
                if ((pZip->m_archive_size - (cur_file_ofs + i)) >= record_size)
                    break;
            }
        }

        if (i >= 0)
        {
            cur_file_ofs += i;
            break;
        }

        /* Give up if we've searched the entire file, or we've gone back "too far" (~64kb) */
        if ((!cur_file_ofs) || ((pZip->m_archive_size - cur_file_ofs) >= (MZ_UINT16_MAX + record_size)))
            return MZ_FALSE;

        cur_file_ofs = MZ_MAX(cur_file_ofs - (sizeof(buf_u32) - 3), 0);
    }

    *pOfs = cur_file_ofs;
    return MZ_TRUE;
}

static mz_bool mz_zip_reader_read_central_dir(mz_zip_archive *pZip, mz_uint flags)
{
    mz_uint cdir_size = 0, cdir_entries_on_this_disk = 0, num_this_disk = 0, cdir_disk_index = 0;
    mz_uint64 cdir_ofs = 0;
    mz_int64 cur_file_ofs = 0;
    const mz_uint8 *p;

    mz_uint32 buf_u32[4096 / sizeof(mz_uint32)];
    mz_uint8 *pBuf = (mz_uint8 *)buf_u32;
    mz_bool sort_central_dir = ((flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0);
    mz_uint32 zip64_end_of_central_dir_locator_u32[(MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pZip64_locator = (mz_uint8 *)zip64_end_of_central_dir_locator_u32;

    mz_uint32 zip64_end_of_central_dir_header_u32[(MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pZip64_end_of_central_dir = (mz_uint8 *)zip64_end_of_central_dir_header_u32;

    mz_uint64 zip64_end_of_central_dir_ofs = 0;

    /* Basic sanity checks - reject files which are too small, and check the first 4 bytes of the file to make sure a local header is there. */
    if (pZip->m_archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);

    if (!mz_zip_reader_locate_header_sig(pZip, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE, &cur_file_ofs))
        return mz_zip_set_error(pZip, MZ_ZIP_FAILED_FINDING_CENTRAL_DIR);

    /* Read and verify the end of central directory record. */
    if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

    if (MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_SIG_OFS) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);

    if (cur_file_ofs >= (MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE + MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE))
    {
        if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs - MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE, pZip64_locator, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) == MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE)
        {
            if (MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_SIG_OFS) == MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG)
            {
                zip64_end_of_central_dir_ofs = MZ_READ_LE64(pZip64_locator + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS);
                if (zip64_end_of_central_dir_ofs > (pZip->m_archive_size - MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE))
                    return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);

                if (pZip->m_pRead(pZip->m_pIO_opaque, zip64_end_of_central_dir_ofs, pZip64_end_of_central_dir, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) == MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE)
                {
                    if (MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIG_OFS) == MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG)
                    {
                        pZip->m_pState->m_zip64 = MZ_TRUE;
                    }
                }
            }
        }
    }

    pZip->m_total_files = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS);
    cdir_entries_on_this_disk = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS);
    num_this_disk = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_THIS_DISK_OFS);
    cdir_disk_index = MZ_READ_LE16(pBuf + MZ_ZIP_ECDH_NUM_DISK_CDIR_OFS);
    cdir_size = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_SIZE_OFS);
    cdir_ofs = MZ_READ_LE32(pBuf + MZ_ZIP_ECDH_CDIR_OFS_OFS);

    if (pZip->m_pState->m_zip64)
    {
        mz_uint32 zip64_total_num_of_disks = MZ_READ_LE32(pZip64_locator + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS);
        mz_uint64 zip64_cdir_total_entries = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS);
        mz_uint64 zip64_cdir_total_entries_on_this_disk = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS);
        mz_uint64 zip64_size_of_end_of_central_dir_record = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS);
        mz_uint64 zip64_size_of_central_directory = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_SIZE_OFS);

        if (zip64_size_of_end_of_central_dir_record < (MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE - 12))
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

        if (zip64_total_num_of_disks != 1U)
            return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);

        /* Check for miniz's practical limits */
        if (zip64_cdir_total_entries > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);

        pZip->m_total_files = (mz_uint32)zip64_cdir_total_entries;

        if (zip64_cdir_total_entries_on_this_disk > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);

        cdir_entries_on_this_disk = (mz_uint32)zip64_cdir_total_entries_on_this_disk;

        /* Check for miniz's current practical limits (sorry, this should be enough for millions of files) */
        if (zip64_size_of_central_directory > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);

        cdir_size = (mz_uint32)zip64_size_of_central_directory;

        num_this_disk = MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_NUM_THIS_DISK_OFS);

        cdir_disk_index = MZ_READ_LE32(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_NUM_DISK_CDIR_OFS);

        cdir_ofs = MZ_READ_LE64(pZip64_end_of_central_dir + MZ_ZIP64_ECDH_CDIR_OFS_OFS);
    }

    if (pZip->m_total_files != cdir_entries_on_this_disk)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);

    if (((num_this_disk | cdir_disk_index) != 0) && ((num_this_disk != 1) || (cdir_disk_index != 1)))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);

    if (cdir_size < pZip->m_total_files * MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    if ((cdir_ofs + (mz_uint64)cdir_size) > pZip->m_archive_size)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    pZip->m_central_directory_file_ofs = cdir_ofs;

    if (pZip->m_total_files)
    {
        mz_uint i, n;
        /* Read the entire central directory into a heap block, and allocate another heap block to hold the unsorted central dir file record offsets, and possibly another to hold the sorted indices. */
        if ((!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir, cdir_size, MZ_FALSE)) ||
            (!mz_zip_array_resize(pZip, &pZip->m_pState->m_central_dir_offsets, pZip->m_total_files, MZ_FALSE)))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

        if (sort_central_dir)
        {
            if (!mz_zip_array_resize(pZip, &pZip->m_pState->m_sorted_central_dir_offsets, pZip->m_total_files, MZ_FALSE))
                return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (pZip->m_pRead(pZip->m_pIO_opaque, cdir_ofs, pZip->m_pState->m_central_dir.m_p, cdir_size) != cdir_size)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

        /* Now create an index into the central directory file records, do some basic sanity checking on each record */
        p = (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p;
        for (n = cdir_size, i = 0; i < pZip->m_total_files; ++i)
        {
            mz_uint total_header_size, disk_index, bit_flags, filename_size, ext_data_size;
            mz_uint64 comp_size, decomp_size, local_header_ofs;

            if ((n < MZ_ZIP_CENTRAL_DIR_HEADER_SIZE) || (MZ_READ_LE32(p) != MZ_ZIP_CENTRAL_DIR_HEADER_SIG))
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

            MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, i) = (mz_uint32)(p - (const mz_uint8 *)pZip->m_pState->m_central_dir.m_p);

            if (sort_central_dir)
                MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_sorted_central_dir_offsets, mz_uint32, i) = i;

            comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS);
            decomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS);
            local_header_ofs = MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS);
            filename_size = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);
            ext_data_size = MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS);

            if ((!pZip->m_pState->m_zip64_has_extended_info_fields) &&
                (ext_data_size) &&
                (MZ_MAX(MZ_MAX(comp_size, decomp_size), local_header_ofs) == MZ_UINT32_MAX))
            {
                /* Attempt to find zip64 extended information field in the entry's extra data */
                mz_uint32 extra_size_remaining = ext_data_size;

                if (extra_size_remaining)
                {
					const mz_uint8 *pExtra_data;
					void* buf = NULL;

					if (MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size + ext_data_size > n)
					{
						buf = MZ_MALLOC(ext_data_size);
						if(buf==NULL)
							return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

						if (pZip->m_pRead(pZip->m_pIO_opaque, cdir_ofs + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size, buf, ext_data_size) != ext_data_size)
						{
							MZ_FREE(buf);
							return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
						}

						pExtra_data = (mz_uint8*)buf;
					}
					else
					{
						pExtra_data = p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size;
					}

                    do
                    {
                        mz_uint32 field_id;
                        mz_uint32 field_data_size;

						if (extra_size_remaining < (sizeof(mz_uint16) * 2))
						{
							MZ_FREE(buf);
							return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
						}

                        field_id = MZ_READ_LE16(pExtra_data);
                        field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));

						if ((field_data_size + sizeof(mz_uint16) * 2) > extra_size_remaining)
						{
							MZ_FREE(buf);
							return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
						}

                        if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID)
                        {
                            /* Ok, the archive didn't have any zip64 headers but it uses a zip64 extended information field so mark it as zip64 anyway (this can occur with infozip's zip util when it reads compresses files from stdin). */
                            pZip->m_pState->m_zip64 = MZ_TRUE;
                            pZip->m_pState->m_zip64_has_extended_info_fields = MZ_TRUE;
                            break;
                        }

                        pExtra_data += sizeof(mz_uint16) * 2 + field_data_size;
                        extra_size_remaining = extra_size_remaining - sizeof(mz_uint16) * 2 - field_data_size;
                    } while (extra_size_remaining);

					MZ_FREE(buf);
                }
            }

            /* I've seen archives that aren't marked as zip64 that uses zip64 ext data, argh */
            if ((comp_size != MZ_UINT32_MAX) && (decomp_size != MZ_UINT32_MAX))
            {
                if (((!MZ_READ_LE32(p + MZ_ZIP_CDH_METHOD_OFS)) && (decomp_size != comp_size)) || (decomp_size && !comp_size))
                    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
            }

            disk_index = MZ_READ_LE16(p + MZ_ZIP_CDH_DISK_START_OFS);
            if ((disk_index == MZ_UINT16_MAX) || ((disk_index != num_this_disk) && (disk_index != 1)))
                return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_MULTIDISK);

            if (comp_size != MZ_UINT32_MAX)
            {
                if (((mz_uint64)MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS) + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + comp_size) > pZip->m_archive_size)
                    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
            }

            bit_flags = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS);
            if (bit_flags & MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_LOCAL_DIR_IS_MASKED)
                return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);

            if ((total_header_size = MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS)) > n)
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

            n -= total_header_size;
            p += total_header_size;
        }
    }

    if (sort_central_dir)
        mz_zip_reader_sort_central_dir_offsets_by_filename(pZip);

    return MZ_TRUE;
}

void mz_zip_zero_struct(mz_zip_archive *pZip)
{
    if (pZip)
        MZ_CLEAR_OBJ(*pZip);
}

static mz_bool mz_zip_reader_end_internal(mz_zip_archive *pZip, mz_bool set_last_error)
{
    mz_bool status = MZ_TRUE;

    if (!pZip)
        return MZ_FALSE;

    if ((!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (pZip->m_zip_mode != MZ_ZIP_MODE_READING))
    {
        if (set_last_error)
            pZip->m_last_error = MZ_ZIP_INVALID_PARAMETER;

        return MZ_FALSE;
    }

    if (pZip->m_pState)
    {
        mz_zip_internal_state *pState = pZip->m_pState;
        pZip->m_pState = NULL;

        mz_zip_array_clear(pZip, &pState->m_central_dir);
        mz_zip_array_clear(pZip, &pState->m_central_dir_offsets);
        mz_zip_array_clear(pZip, &pState->m_sorted_central_dir_offsets);

#ifndef MINIZ_NO_STDIO
        if (pState->m_pFile)
        {
            if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE)
            {
                if (MZ_FCLOSE(pState->m_pFile) == EOF)
                {
                    if (set_last_error)
                        pZip->m_last_error = MZ_ZIP_FILE_CLOSE_FAILED;
                    status = MZ_FALSE;
                }
            }
            pState->m_pFile = NULL;
        }
#endif /* #ifndef MINIZ_NO_STDIO */

        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
    }
    pZip->m_zip_mode = MZ_ZIP_MODE_INVALID;

    return status;
}

mz_bool mz_zip_reader_end(mz_zip_archive *pZip)
{
    return mz_zip_reader_end_internal(pZip, MZ_TRUE);
}
mz_bool mz_zip_reader_init(mz_zip_archive *pZip, mz_uint64 size, mz_uint flags)
{
    if ((!pZip) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_reader_init_internal(pZip, flags))
        return MZ_FALSE;

    pZip->m_zip_type = MZ_ZIP_TYPE_USER;
    pZip->m_archive_size = size;

    if (!mz_zip_reader_read_central_dir(pZip, flags))
    {
        mz_zip_reader_end_internal(pZip, MZ_FALSE);
        return MZ_FALSE;
    }

    return MZ_TRUE;
}

static size_t mz_zip_mem_read_func(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n)
{
    mz_zip_archive *pZip = (mz_zip_archive *)pOpaque;
    size_t s = (file_ofs >= pZip->m_archive_size) ? 0 : (size_t)MZ_MIN(pZip->m_archive_size - file_ofs, n);
    memcpy(pBuf, (const mz_uint8 *)pZip->m_pState->m_pMem + file_ofs, s);
    return s;
}

mz_bool mz_zip_reader_init_mem(mz_zip_archive *pZip, const void *pMem, size_t size, mz_uint flags)
{
    if (!pMem)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);

    if (!mz_zip_reader_init_internal(pZip, flags))
        return MZ_FALSE;

    pZip->m_zip_type = MZ_ZIP_TYPE_MEMORY;
    pZip->m_archive_size = size;
    pZip->m_pRead = mz_zip_mem_read_func;
    pZip->m_pIO_opaque = pZip;
    pZip->m_pNeeds_keepalive = NULL;

#ifdef __cplusplus
    pZip->m_pState->m_pMem = const_cast<void *>(pMem);
#else
    pZip->m_pState->m_pMem = (void *)pMem;
#endif

    pZip->m_pState->m_mem_size = size;

    if (!mz_zip_reader_read_central_dir(pZip, flags))
    {
        mz_zip_reader_end_internal(pZip, MZ_FALSE);
        return MZ_FALSE;
    }

    return MZ_TRUE;
}

#ifndef MINIZ_NO_STDIO
static size_t mz_zip_file_read_func(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n)
{
    mz_zip_archive *pZip = (mz_zip_archive *)pOpaque;
    mz_int64 cur_ofs = MZ_FTELL64(pZip->m_pState->m_pFile);

    file_ofs += pZip->m_pState->m_file_archive_start_ofs;

    if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pZip->m_pState->m_pFile, (mz_int64)file_ofs, SEEK_SET))))
        return 0;

    return MZ_FREAD(pBuf, 1, n, pZip->m_pState->m_pFile);
}

mz_bool mz_zip_reader_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint32 flags)
{
    return mz_zip_reader_init_file_v2(pZip, pFilename, flags, 0, 0);
}

mz_bool mz_zip_reader_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags, mz_uint64 file_start_ofs, mz_uint64 archive_size)
{
    mz_uint64 file_size;
    MZ_FILE *pFile;

    if ((!pZip) || (!pFilename) || ((archive_size) && (archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pFile = MZ_FOPEN(pFilename, "rb");
    if (!pFile)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);

    file_size = archive_size;
    if (!file_size)
    {
        if (MZ_FSEEK64(pFile, 0, SEEK_END))
        {
            MZ_FCLOSE(pFile);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED);
        }

        file_size = MZ_FTELL64(pFile);
    }

    /* TODO: Better sanity check archive_size and the # of actual remaining bytes */

    if (file_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
    {
	MZ_FCLOSE(pFile);
        return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);
    }

    if (!mz_zip_reader_init_internal(pZip, flags))
    {
        MZ_FCLOSE(pFile);
        return MZ_FALSE;
    }

    pZip->m_zip_type = MZ_ZIP_TYPE_FILE;
    pZip->m_pRead = mz_zip_file_read_func;
    pZip->m_pIO_opaque = pZip;
    pZip->m_pState->m_pFile = pFile;
    pZip->m_archive_size = file_size;
    pZip->m_pState->m_file_archive_start_ofs = file_start_ofs;

    if (!mz_zip_reader_read_central_dir(pZip, flags))
    {
        mz_zip_reader_end_internal(pZip, MZ_FALSE);
        return MZ_FALSE;
    }

    return MZ_TRUE;
}

mz_bool mz_zip_reader_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint64 archive_size, mz_uint flags)
{
    mz_uint64 cur_file_ofs;

    if ((!pZip) || (!pFile))
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);

    cur_file_ofs = MZ_FTELL64(pFile);

    if (!archive_size)
    {
        if (MZ_FSEEK64(pFile, 0, SEEK_END))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED);

        archive_size = MZ_FTELL64(pFile) - cur_file_ofs;

        if (archive_size < MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
            return mz_zip_set_error(pZip, MZ_ZIP_NOT_AN_ARCHIVE);
    }

    if (!mz_zip_reader_init_internal(pZip, flags))
        return MZ_FALSE;

    pZip->m_zip_type = MZ_ZIP_TYPE_CFILE;
    pZip->m_pRead = mz_zip_file_read_func;

    pZip->m_pIO_opaque = pZip;
    pZip->m_pState->m_pFile = pFile;
    pZip->m_archive_size = archive_size;
    pZip->m_pState->m_file_archive_start_ofs = cur_file_ofs;

    if (!mz_zip_reader_read_central_dir(pZip, flags))
    {
        mz_zip_reader_end_internal(pZip, MZ_FALSE);
        return MZ_FALSE;
    }

    return MZ_TRUE;
}

#endif /* #ifndef MINIZ_NO_STDIO */

static MZ_FORCEINLINE const mz_uint8 *mz_zip_get_cdh(mz_zip_archive *pZip, mz_uint file_index)
{
    if ((!pZip) || (!pZip->m_pState) || (file_index >= pZip->m_total_files))
        return NULL;
    return &MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index));
}

mz_bool mz_zip_reader_is_file_encrypted(mz_zip_archive *pZip, mz_uint file_index)
{
    mz_uint m_bit_flag;
    const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index);
    if (!p)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return MZ_FALSE;
    }

    m_bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS);
    return (m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION)) != 0;
}

mz_bool mz_zip_reader_is_file_supported(mz_zip_archive *pZip, mz_uint file_index)
{
    mz_uint bit_flag;
    mz_uint method;

    const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index);
    if (!p)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return MZ_FALSE;
    }

    method = MZ_READ_LE16(p + MZ_ZIP_CDH_METHOD_OFS);
    bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS);

    if ((method != 0) && (method != MZ_DEFLATED))
    {
        mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD);
        return MZ_FALSE;
    }

    if (bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION))
    {
        mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);
        return MZ_FALSE;
    }

    if (bit_flag & MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG)
    {
        mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE);
        return MZ_FALSE;
    }

    return MZ_TRUE;
}

mz_bool mz_zip_reader_is_file_a_directory(mz_zip_archive *pZip, mz_uint file_index)
{
    mz_uint filename_len, attribute_mapping_id, external_attr;
    const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index);
    if (!p)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return MZ_FALSE;
    }

    filename_len = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    if (filename_len)
    {
        if (*(p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_len - 1) == '/')
            return MZ_TRUE;
    }

    /* Bugfix: This code was also checking if the internal attribute was non-zero, which wasn't correct. */
    /* Most/all zip writers (hopefully) set DOS file/directory attributes in the low 16-bits, so check for the DOS directory flag and ignore the source OS ID in the created by field. */
    /* FIXME: Remove this check? Is it necessary - we already check the filename. */
    attribute_mapping_id = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_MADE_BY_OFS) >> 8;
    (void)attribute_mapping_id;

    external_attr = MZ_READ_LE32(p + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS);
    if ((external_attr & MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG) != 0)
    {
        return MZ_TRUE;
    }

    return MZ_FALSE;
}

static mz_bool mz_zip_file_stat_internal(mz_zip_archive *pZip, mz_uint file_index, const mz_uint8 *pCentral_dir_header, mz_zip_archive_file_stat *pStat, mz_bool *pFound_zip64_extra_data)
{
    mz_uint n;
    const mz_uint8 *p = pCentral_dir_header;

    if (pFound_zip64_extra_data)
        *pFound_zip64_extra_data = MZ_FALSE;

    if ((!p) || (!pStat))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    /* Extract fields from the central directory record. */
    pStat->m_file_index = file_index;
    pStat->m_central_dir_ofs = MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index);
    pStat->m_version_made_by = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_MADE_BY_OFS);
    pStat->m_version_needed = MZ_READ_LE16(p + MZ_ZIP_CDH_VERSION_NEEDED_OFS);
    pStat->m_bit_flag = MZ_READ_LE16(p + MZ_ZIP_CDH_BIT_FLAG_OFS);
    pStat->m_method = MZ_READ_LE16(p + MZ_ZIP_CDH_METHOD_OFS);
#ifndef MINIZ_NO_TIME
    pStat->m_time = mz_zip_dos_to_time_t(MZ_READ_LE16(p + MZ_ZIP_CDH_FILE_TIME_OFS), MZ_READ_LE16(p + MZ_ZIP_CDH_FILE_DATE_OFS));
#endif
    pStat->m_crc32 = MZ_READ_LE32(p + MZ_ZIP_CDH_CRC32_OFS);
    pStat->m_comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS);
    pStat->m_uncomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS);
    pStat->m_internal_attr = MZ_READ_LE16(p + MZ_ZIP_CDH_INTERNAL_ATTR_OFS);
    pStat->m_external_attr = MZ_READ_LE32(p + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS);
    pStat->m_local_header_ofs = MZ_READ_LE32(p + MZ_ZIP_CDH_LOCAL_HEADER_OFS);

    /* Copy as much of the filename and comment as possible. */
    n = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    n = MZ_MIN(n, MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE - 1);
    memcpy(pStat->m_filename, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, n);
    pStat->m_filename[n] = '\0';

    n = MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS);
    n = MZ_MIN(n, MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE - 1);
    pStat->m_comment_size = n;
    memcpy(pStat->m_comment, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) + MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS), n);
    pStat->m_comment[n] = '\0';

    /* Set some flags for convienance */
    pStat->m_is_directory = mz_zip_reader_is_file_a_directory(pZip, file_index);
    pStat->m_is_encrypted = mz_zip_reader_is_file_encrypted(pZip, file_index);
    pStat->m_is_supported = mz_zip_reader_is_file_supported(pZip, file_index);

    /* See if we need to read any zip64 extended information fields. */
    /* Confusingly, these zip64 fields can be present even on non-zip64 archives (Debian zip on a huge files from stdin piped to stdout creates them). */
    if (MZ_MAX(MZ_MAX(pStat->m_comp_size, pStat->m_uncomp_size), pStat->m_local_header_ofs) == MZ_UINT32_MAX)
    {
        /* Attempt to find zip64 extended information field in the entry's extra data */
        mz_uint32 extra_size_remaining = MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS);

        if (extra_size_remaining)
        {
            const mz_uint8 *pExtra_data = p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);

            do
            {
                mz_uint32 field_id;
                mz_uint32 field_data_size;

                if (extra_size_remaining < (sizeof(mz_uint16) * 2))
                    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

                field_id = MZ_READ_LE16(pExtra_data);
                field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));

                if ((field_data_size + sizeof(mz_uint16) * 2) > extra_size_remaining)
                    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

                if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID)
                {
                    const mz_uint8 *pField_data = pExtra_data + sizeof(mz_uint16) * 2;
                    mz_uint32 field_data_remaining = field_data_size;

                    if (pFound_zip64_extra_data)
                        *pFound_zip64_extra_data = MZ_TRUE;

                    if (pStat->m_uncomp_size == MZ_UINT32_MAX)
                    {
                        if (field_data_remaining < sizeof(mz_uint64))
                            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

                        pStat->m_uncomp_size = MZ_READ_LE64(pField_data);
                        pField_data += sizeof(mz_uint64);
                        field_data_remaining -= sizeof(mz_uint64);
                    }

                    if (pStat->m_comp_size == MZ_UINT32_MAX)
                    {
                        if (field_data_remaining < sizeof(mz_uint64))
                            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

                        pStat->m_comp_size = MZ_READ_LE64(pField_data);
                        pField_data += sizeof(mz_uint64);
                        field_data_remaining -= sizeof(mz_uint64);
                    }

                    if (pStat->m_local_header_ofs == MZ_UINT32_MAX)
                    {
                        if (field_data_remaining < sizeof(mz_uint64))
                            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

                        pStat->m_local_header_ofs = MZ_READ_LE64(pField_data);
                        pField_data += sizeof(mz_uint64);
                        field_data_remaining -= sizeof(mz_uint64);
                    }

                    break;
                }

                pExtra_data += sizeof(mz_uint16) * 2 + field_data_size;
                extra_size_remaining = extra_size_remaining - sizeof(mz_uint16) * 2 - field_data_size;
            } while (extra_size_remaining);
        }
    }

    return MZ_TRUE;
}

static MZ_FORCEINLINE mz_bool mz_zip_string_equal(const char *pA, const char *pB, mz_uint len, mz_uint flags)
{
    mz_uint i;
    if (flags & MZ_ZIP_FLAG_CASE_SENSITIVE)
        return 0 == memcmp(pA, pB, len);
    for (i = 0; i < len; ++i)
        if (MZ_TOLOWER(pA[i]) != MZ_TOLOWER(pB[i]))
            return MZ_FALSE;
    return MZ_TRUE;
}

static MZ_FORCEINLINE int mz_zip_filename_compare(const mz_zip_array *pCentral_dir_array, const mz_zip_array *pCentral_dir_offsets, mz_uint l_index, const char *pR, mz_uint r_len)
{
    const mz_uint8 *pL = &MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_array, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(pCentral_dir_offsets, mz_uint32, l_index)), *pE;
    mz_uint l_len = MZ_READ_LE16(pL + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    mz_uint8 l = 0, r = 0;
    pL += MZ_ZIP_CENTRAL_DIR_HEADER_SIZE;
    pE = pL + MZ_MIN(l_len, r_len);
    while (pL < pE)
    {
        if ((l = MZ_TOLOWER(*pL)) != (r = MZ_TOLOWER(*pR)))
            break;
        pL++;
        pR++;
    }
    return (pL == pE) ? (int)(l_len - r_len) : (l - r);
}

static mz_bool mz_zip_locate_file_binary_search(mz_zip_archive *pZip, const char *pFilename, mz_uint32 *pIndex)
{
    mz_zip_internal_state *pState = pZip->m_pState;
    const mz_zip_array *pCentral_dir_offsets = &pState->m_central_dir_offsets;
    const mz_zip_array *pCentral_dir = &pState->m_central_dir;
    mz_uint32 *pIndices = &MZ_ZIP_ARRAY_ELEMENT(&pState->m_sorted_central_dir_offsets, mz_uint32, 0);
    const uint32_t size = pZip->m_total_files;
    const mz_uint filename_len = (mz_uint)strlen(pFilename);

    if (pIndex)
        *pIndex = 0;

    if (size)
    {
        /* yes I could use uint32_t's, but then we would have to add some special case checks in the loop, argh, and */
        /* honestly the major expense here on 32-bit CPU's will still be the filename compare */
        mz_int64 l = 0, h = (mz_int64)size - 1;

        while (l <= h)
        {
            mz_int64 m = l + ((h - l) >> 1);
            uint32_t file_index = pIndices[(uint32_t)m];

            int comp = mz_zip_filename_compare(pCentral_dir, pCentral_dir_offsets, file_index, pFilename, filename_len);
            if (!comp)
            {
                if (pIndex)
                    *pIndex = file_index;
                return MZ_TRUE;
            }
            else if (comp < 0)
                l = m + 1;
            else
                h = m - 1;
        }
    }

    return mz_zip_set_error(pZip, MZ_ZIP_FILE_NOT_FOUND);
}

int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags)
{
    mz_uint32 index;
    if (!mz_zip_reader_locate_file_v2(pZip, pName, pComment, flags, &index))
        return -1;
    else
        return (int)index;
}

mz_bool mz_zip_reader_locate_file_v2(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags, mz_uint32 *pIndex)
{
    mz_uint file_index;
    size_t name_len, comment_len;

    if (pIndex)
        *pIndex = 0;

    if ((!pZip) || (!pZip->m_pState) || (!pName))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    /* See if we can use a binary search */
    if (((pZip->m_pState->m_init_flags & MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY) == 0) &&
        (pZip->m_zip_mode == MZ_ZIP_MODE_READING) &&
        ((flags & (MZ_ZIP_FLAG_IGNORE_PATH | MZ_ZIP_FLAG_CASE_SENSITIVE)) == 0) && (!pComment) && (pZip->m_pState->m_sorted_central_dir_offsets.m_size))
    {
        return mz_zip_locate_file_binary_search(pZip, pName, pIndex);
    }

    /* Locate the entry by scanning the entire central directory */
    name_len = strlen(pName);
    if (name_len > MZ_UINT16_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    comment_len = pComment ? strlen(pComment) : 0;
    if (comment_len > MZ_UINT16_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    for (file_index = 0; file_index < pZip->m_total_files; file_index++)
    {
        const mz_uint8 *pHeader = &MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir, mz_uint8, MZ_ZIP_ARRAY_ELEMENT(&pZip->m_pState->m_central_dir_offsets, mz_uint32, file_index));
        mz_uint filename_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_FILENAME_LEN_OFS);
        const char *pFilename = (const char *)pHeader + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE;
        if (filename_len < name_len)
            continue;
        if (comment_len)
        {
            mz_uint file_extra_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_EXTRA_LEN_OFS), file_comment_len = MZ_READ_LE16(pHeader + MZ_ZIP_CDH_COMMENT_LEN_OFS);
            const char *pFile_comment = pFilename + filename_len + file_extra_len;
            if ((file_comment_len != comment_len) || (!mz_zip_string_equal(pComment, pFile_comment, file_comment_len, flags)))
                continue;
        }
        if ((flags & MZ_ZIP_FLAG_IGNORE_PATH) && (filename_len))
        {
            int ofs = filename_len - 1;
            do
            {
                if ((pFilename[ofs] == '/') || (pFilename[ofs] == '\\') || (pFilename[ofs] == ':'))
                    break;
            } while (--ofs >= 0);
            ofs++;
            pFilename += ofs;
            filename_len -= ofs;
        }
        if ((filename_len == name_len) && (mz_zip_string_equal(pName, pFilename, filename_len, flags)))
        {
            if (pIndex)
                *pIndex = file_index;
            return MZ_TRUE;
        }
    }

    return mz_zip_set_error(pZip, MZ_ZIP_FILE_NOT_FOUND);
}

mz_bool mz_zip_reader_extract_to_mem_no_alloc(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size)
{
    int status = TINFL_STATUS_DONE;
    mz_uint64 needed_size, cur_file_ofs, comp_remaining, out_buf_ofs = 0, read_buf_size, read_buf_ofs = 0, read_buf_avail;
    mz_zip_archive_file_stat file_stat;
    void *pRead_buf;
    mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32;
    tinfl_decompressor inflator;

    if ((!pZip) || (!pZip->m_pState) || ((buf_size) && (!pBuf)) || ((user_read_buf_size) && (!pUser_read_buf)) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat))
        return MZ_FALSE;

    /* A directory or zero length file */
    if ((file_stat.m_is_directory) || (!file_stat.m_comp_size))
        return MZ_TRUE;

    /* Encryption and patch files are not supported. */
    if (file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);

    /* This function only supports decompressing stored and deflate. */
    if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD);

    /* Ensure supplied output buffer is large enough. */
    needed_size = (flags & MZ_ZIP_FLAG_COMPRESSED_DATA) ? file_stat.m_comp_size : file_stat.m_uncomp_size;
    if (buf_size < needed_size)
        return mz_zip_set_error(pZip, MZ_ZIP_BUF_TOO_SMALL);

    /* Read and parse the local directory entry. */
    cur_file_ofs = file_stat.m_local_header_ofs;
    if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

    if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS);
    if ((cur_file_ofs + file_stat.m_comp_size) > pZip->m_archive_size)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!file_stat.m_method))
    {
        /* The file is stored or the caller has requested the compressed data. */
        if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pBuf, (size_t)needed_size) != needed_size)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
        if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) == 0)
        {
            if (mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, (size_t)file_stat.m_uncomp_size) != file_stat.m_crc32)
                return mz_zip_set_error(pZip, MZ_ZIP_CRC_CHECK_FAILED);
        }
#endif

        return MZ_TRUE;
    }

    /* Decompress the file either directly from memory or from a file input buffer. */
    tinfl_init(&inflator);

    if (pZip->m_pState->m_pMem)
    {
        /* Read directly from the archive in memory. */
        pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + cur_file_ofs;
        read_buf_size = read_buf_avail = file_stat.m_comp_size;
        comp_remaining = 0;
    }
    else if (pUser_read_buf)
    {
        /* Use a user provided read buffer. */
        if (!user_read_buf_size)
            return MZ_FALSE;
        pRead_buf = (mz_uint8 *)pUser_read_buf;
        read_buf_size = user_read_buf_size;
        read_buf_avail = 0;
        comp_remaining = file_stat.m_comp_size;
    }
    else
    {
        /* Temporarily allocate a read buffer. */
        read_buf_size = MZ_MIN(file_stat.m_comp_size, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE);
        if (((sizeof(size_t) == sizeof(mz_uint32))) && (read_buf_size > 0x7FFFFFFF))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        if (NULL == (pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)read_buf_size)))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

        read_buf_avail = 0;
        comp_remaining = file_stat.m_comp_size;
    }

    do
    {
        /* The size_t cast here should be OK because we've verified that the output buffer is >= file_stat.m_uncomp_size above */
        size_t in_buf_size, out_buf_size = (size_t)(file_stat.m_uncomp_size - out_buf_ofs);
        if ((!read_buf_avail) && (!pZip->m_pState->m_pMem))
        {
            read_buf_avail = MZ_MIN(read_buf_size, comp_remaining);
            if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail)
            {
                status = TINFL_STATUS_FAILED;
                mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED);
                break;
            }
            cur_file_ofs += read_buf_avail;
            comp_remaining -= read_buf_avail;
            read_buf_ofs = 0;
        }
        in_buf_size = (size_t)read_buf_avail;
        status = tinfl_decompress(&inflator, (mz_uint8 *)pRead_buf + read_buf_ofs, &in_buf_size, (mz_uint8 *)pBuf, (mz_uint8 *)pBuf + out_buf_ofs, &out_buf_size, TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF | (comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0));
        read_buf_avail -= in_buf_size;
        read_buf_ofs += in_buf_size;
        out_buf_ofs += out_buf_size;
    } while (status == TINFL_STATUS_NEEDS_MORE_INPUT);

    if (status == TINFL_STATUS_DONE)
    {
        /* Make sure the entire file was decompressed, and check its CRC. */
        if (out_buf_ofs != file_stat.m_uncomp_size)
        {
            mz_zip_set_error(pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE);
            status = TINFL_STATUS_FAILED;
        }
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
        else if (mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, (size_t)file_stat.m_uncomp_size) != file_stat.m_crc32)
        {
            mz_zip_set_error(pZip, MZ_ZIP_CRC_CHECK_FAILED);
            status = TINFL_STATUS_FAILED;
        }
#endif
    }

    if ((!pZip->m_pState->m_pMem) && (!pUser_read_buf))
        pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);

    return status == TINFL_STATUS_DONE;
}

mz_bool mz_zip_reader_extract_file_to_mem_no_alloc(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size)
{
    mz_uint32 file_index;
    if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index))
        return MZ_FALSE;
    return mz_zip_reader_extract_to_mem_no_alloc(pZip, file_index, pBuf, buf_size, flags, pUser_read_buf, user_read_buf_size);
}

mz_bool mz_zip_reader_extract_to_mem(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags)
{
    return mz_zip_reader_extract_to_mem_no_alloc(pZip, file_index, pBuf, buf_size, flags, NULL, 0);
}

mz_bool mz_zip_reader_extract_file_to_mem(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags)
{
    return mz_zip_reader_extract_file_to_mem_no_alloc(pZip, pFilename, pBuf, buf_size, flags, NULL, 0);
}

void *mz_zip_reader_extract_to_heap(mz_zip_archive *pZip, mz_uint file_index, size_t *pSize, mz_uint flags)
{
    mz_uint64 comp_size, uncomp_size, alloc_size;
    const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index);
    void *pBuf;

    if (pSize)
        *pSize = 0;

    if (!p)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return NULL;
    }

    comp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS);
    uncomp_size = MZ_READ_LE32(p + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS);

    alloc_size = (flags & MZ_ZIP_FLAG_COMPRESSED_DATA) ? comp_size : uncomp_size;
    if (((sizeof(size_t) == sizeof(mz_uint32))) && (alloc_size > 0x7FFFFFFF))
    {
        mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);
        return NULL;
    }

    if (NULL == (pBuf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)alloc_size)))
    {
        mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        return NULL;
    }

    if (!mz_zip_reader_extract_to_mem(pZip, file_index, pBuf, (size_t)alloc_size, flags))
    {
        pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
        return NULL;
    }

    if (pSize)
        *pSize = (size_t)alloc_size;
    return pBuf;
}

void *mz_zip_reader_extract_file_to_heap(mz_zip_archive *pZip, const char *pFilename, size_t *pSize, mz_uint flags)
{
    mz_uint32 file_index;
    if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index))
    {
        if (pSize)
            *pSize = 0;
        return MZ_FALSE;
    }
    return mz_zip_reader_extract_to_heap(pZip, file_index, pSize, flags);
}

mz_bool mz_zip_reader_extract_to_callback(mz_zip_archive *pZip, mz_uint file_index, mz_file_write_func pCallback, void *pOpaque, mz_uint flags)
{
    int status = TINFL_STATUS_DONE;
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
    mz_uint file_crc32 = MZ_CRC32_INIT;
#endif
    mz_uint64 read_buf_size, read_buf_ofs = 0, read_buf_avail, comp_remaining, out_buf_ofs = 0, cur_file_ofs;
    mz_zip_archive_file_stat file_stat;
    void *pRead_buf = NULL;
    void *pWrite_buf = NULL;
    mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32;

    if ((!pZip) || (!pZip->m_pState) || (!pCallback) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat))
        return MZ_FALSE;

    /* A directory or zero length file */
    if ((file_stat.m_is_directory) || (!file_stat.m_comp_size))
        return MZ_TRUE;

    /* Encryption and patch files are not supported. */
    if (file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);

    /* This function only supports decompressing stored and deflate. */
    if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD);

    /* Read and do some minimal validation of the local directory entry (this doesn't crack the zip64 stuff, which we already have from the central dir) */
    cur_file_ofs = file_stat.m_local_header_ofs;
    if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

    if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS);
    if ((cur_file_ofs + file_stat.m_comp_size) > pZip->m_archive_size)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    /* Decompress the file either directly from memory or from a file input buffer. */
    if (pZip->m_pState->m_pMem)
    {
        pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + cur_file_ofs;
        read_buf_size = read_buf_avail = file_stat.m_comp_size;
        comp_remaining = 0;
    }
    else
    {
        read_buf_size = MZ_MIN(file_stat.m_comp_size, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE);
        if (NULL == (pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)read_buf_size)))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

        read_buf_avail = 0;
        comp_remaining = file_stat.m_comp_size;
    }

    if ((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!file_stat.m_method))
    {
        /* The file is stored or the caller has requested the compressed data. */
        if (pZip->m_pState->m_pMem)
        {
            if (((sizeof(size_t) == sizeof(mz_uint32))) && (file_stat.m_comp_size > MZ_UINT32_MAX))
                return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

            if (pCallback(pOpaque, out_buf_ofs, pRead_buf, (size_t)file_stat.m_comp_size) != file_stat.m_comp_size)
            {
                mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED);
                status = TINFL_STATUS_FAILED;
            }
            else if (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA))
            {
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
                file_crc32 = (mz_uint32)mz_crc32(file_crc32, (const mz_uint8 *)pRead_buf, (size_t)file_stat.m_comp_size);
#endif
            }

            cur_file_ofs += file_stat.m_comp_size;
            out_buf_ofs += file_stat.m_comp_size;
            comp_remaining = 0;
        }
        else
        {
            while (comp_remaining)
            {
                read_buf_avail = MZ_MIN(read_buf_size, comp_remaining);
                if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail)
                {
                    mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
                    status = TINFL_STATUS_FAILED;
                    break;
                }

#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
                if (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA))
                {
                    file_crc32 = (mz_uint32)mz_crc32(file_crc32, (const mz_uint8 *)pRead_buf, (size_t)read_buf_avail);
                }
#endif

                if (pCallback(pOpaque, out_buf_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail)
                {
                    mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED);
                    status = TINFL_STATUS_FAILED;
                    break;
                }

                cur_file_ofs += read_buf_avail;
                out_buf_ofs += read_buf_avail;
                comp_remaining -= read_buf_avail;
            }
        }
    }
    else
    {
        tinfl_decompressor inflator;
        tinfl_init(&inflator);

        if (NULL == (pWrite_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, TINFL_LZ_DICT_SIZE)))
        {
            mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
            status = TINFL_STATUS_FAILED;
        }
        else
        {
            do
            {
                mz_uint8 *pWrite_buf_cur = (mz_uint8 *)pWrite_buf + (out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1));
                size_t in_buf_size, out_buf_size = TINFL_LZ_DICT_SIZE - (out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1));
                if ((!read_buf_avail) && (!pZip->m_pState->m_pMem))
                {
                    read_buf_avail = MZ_MIN(read_buf_size, comp_remaining);
                    if (pZip->m_pRead(pZip->m_pIO_opaque, cur_file_ofs, pRead_buf, (size_t)read_buf_avail) != read_buf_avail)
                    {
                        mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
                        status = TINFL_STATUS_FAILED;
                        break;
                    }
                    cur_file_ofs += read_buf_avail;
                    comp_remaining -= read_buf_avail;
                    read_buf_ofs = 0;
                }

                in_buf_size = (size_t)read_buf_avail;
                status = tinfl_decompress(&inflator, (const mz_uint8 *)pRead_buf + read_buf_ofs, &in_buf_size, (mz_uint8 *)pWrite_buf, pWrite_buf_cur, &out_buf_size, comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0);
                read_buf_avail -= in_buf_size;
                read_buf_ofs += in_buf_size;

                if (out_buf_size)
                {
                    if (pCallback(pOpaque, out_buf_ofs, pWrite_buf_cur, out_buf_size) != out_buf_size)
                    {
                        mz_zip_set_error(pZip, MZ_ZIP_WRITE_CALLBACK_FAILED);
                        status = TINFL_STATUS_FAILED;
                        break;
                    }

#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
                    file_crc32 = (mz_uint32)mz_crc32(file_crc32, pWrite_buf_cur, out_buf_size);
#endif
                    if ((out_buf_ofs += out_buf_size) > file_stat.m_uncomp_size)
                    {
                        mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED);
                        status = TINFL_STATUS_FAILED;
                        break;
                    }
                }
            } while ((status == TINFL_STATUS_NEEDS_MORE_INPUT) || (status == TINFL_STATUS_HAS_MORE_OUTPUT));
        }
    }

    if ((status == TINFL_STATUS_DONE) && (!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)))
    {
        /* Make sure the entire file was decompressed, and check its CRC. */
        if (out_buf_ofs != file_stat.m_uncomp_size)
        {
            mz_zip_set_error(pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE);
            status = TINFL_STATUS_FAILED;
        }
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
        else if (file_crc32 != file_stat.m_crc32)
        {
            mz_zip_set_error(pZip, MZ_ZIP_DECOMPRESSION_FAILED);
            status = TINFL_STATUS_FAILED;
        }
#endif
    }

    if (!pZip->m_pState->m_pMem)
        pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);

    if (pWrite_buf)
        pZip->m_pFree(pZip->m_pAlloc_opaque, pWrite_buf);

    return status == TINFL_STATUS_DONE;
}

mz_bool mz_zip_reader_extract_file_to_callback(mz_zip_archive *pZip, const char *pFilename, mz_file_write_func pCallback, void *pOpaque, mz_uint flags)
{
    mz_uint32 file_index;
    if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index))
        return MZ_FALSE;

    return mz_zip_reader_extract_to_callback(pZip, file_index, pCallback, pOpaque, flags);
}

mz_zip_reader_extract_iter_state* mz_zip_reader_extract_iter_new(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags)
{
    mz_zip_reader_extract_iter_state *pState;
    mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32;

    /* Argument sanity check */
    if ((!pZip) || (!pZip->m_pState))
        return NULL;

    /* Allocate an iterator status structure */
    pState = (mz_zip_reader_extract_iter_state*)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_reader_extract_iter_state));
    if (!pState)
    {
        mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        return NULL;
    }

    /* Fetch file details */
    if (!mz_zip_reader_file_stat(pZip, file_index, &pState->file_stat))
    {
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    /* Encryption and patch files are not supported. */
    if (pState->file_stat.m_bit_flag & (MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_IS_ENCRYPTED | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_USES_STRONG_ENCRYPTION | MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_COMPRESSED_PATCH_FLAG))
    {
        mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    /* This function only supports decompressing stored and deflate. */
    if ((!(flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (pState->file_stat.m_method != 0) && (pState->file_stat.m_method != MZ_DEFLATED))
    {
        mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD);
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    /* Init state - save args */
    pState->pZip = pZip;
    pState->flags = flags;

    /* Init state - reset variables to defaults */
    pState->status = TINFL_STATUS_DONE;
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
    pState->file_crc32 = MZ_CRC32_INIT;
#endif
    pState->read_buf_ofs = 0;
    pState->out_buf_ofs = 0;
    pState->pRead_buf = NULL;
    pState->pWrite_buf = NULL;
    pState->out_blk_remain = 0;

    /* Read and parse the local directory entry. */
    pState->cur_file_ofs = pState->file_stat.m_local_header_ofs;
    if (pZip->m_pRead(pZip->m_pIO_opaque, pState->cur_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
    {
        mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    pState->cur_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS) + MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS);
    if ((pState->cur_file_ofs + pState->file_stat.m_comp_size) > pZip->m_archive_size)
    {
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
        return NULL;
    }

    /* Decompress the file either directly from memory or from a file input buffer. */
    if (pZip->m_pState->m_pMem)
    {
        pState->pRead_buf = (mz_uint8 *)pZip->m_pState->m_pMem + pState->cur_file_ofs;
        pState->read_buf_size = pState->read_buf_avail = pState->file_stat.m_comp_size;
        pState->comp_remaining = pState->file_stat.m_comp_size;
    }
    else
    {
        if (!((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method)))
        {
            /* Decompression required, therefore intermediate read buffer required */
            pState->read_buf_size = MZ_MIN(pState->file_stat.m_comp_size, (mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE);
            if (NULL == (pState->pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)pState->read_buf_size)))
            {
                mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
                pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
                return NULL;
            }
        }
        else
        {
            /* Decompression not required - we will be reading directly into user buffer, no temp buf required */
            pState->read_buf_size = 0;
        }
        pState->read_buf_avail = 0;
        pState->comp_remaining = pState->file_stat.m_comp_size;
    }

    if (!((flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method)))
    {
        /* Decompression required, init decompressor */
        tinfl_init( &pState->inflator );

        /* Allocate write buffer */
        if (NULL == (pState->pWrite_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, TINFL_LZ_DICT_SIZE)))
        {
            mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
            if (pState->pRead_buf)
                pZip->m_pFree(pZip->m_pAlloc_opaque, pState->pRead_buf);
            pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
            return NULL;
        }
    }

    return pState;
}

mz_zip_reader_extract_iter_state* mz_zip_reader_extract_file_iter_new(mz_zip_archive *pZip, const char *pFilename, mz_uint flags)
{
    mz_uint32 file_index;

    /* Locate file index by name */
    if (!mz_zip_reader_locate_file_v2(pZip, pFilename, NULL, flags, &file_index))
        return NULL;

    /* Construct iterator */
    return mz_zip_reader_extract_iter_new(pZip, file_index, flags);
}

size_t mz_zip_reader_extract_iter_read(mz_zip_reader_extract_iter_state* pState, void* pvBuf, size_t buf_size)
{
    size_t copied_to_caller = 0;

    /* Argument sanity check */
    if ((!pState) || (!pState->pZip) || (!pState->pZip->m_pState) || (!pvBuf))
        return 0;

    if ((pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA) || (!pState->file_stat.m_method))
    {
        /* The file is stored or the caller has requested the compressed data, calc amount to return. */
        copied_to_caller = (size_t)MZ_MIN( buf_size, pState->comp_remaining );

        /* Zip is in memory....or requires reading from a file? */
        if (pState->pZip->m_pState->m_pMem)
        {
            /* Copy data to caller's buffer */
            memcpy( pvBuf, pState->pRead_buf, copied_to_caller );
            pState->pRead_buf = ((mz_uint8*)pState->pRead_buf) + copied_to_caller;
        }
        else
        {
            /* Read directly into caller's buffer */
            if (pState->pZip->m_pRead(pState->pZip->m_pIO_opaque, pState->cur_file_ofs, pvBuf, copied_to_caller) != copied_to_caller)
            {
                /* Failed to read all that was asked for, flag failure and alert user */
                mz_zip_set_error(pState->pZip, MZ_ZIP_FILE_READ_FAILED);
                pState->status = TINFL_STATUS_FAILED;
                copied_to_caller = 0;
            }
        }

#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
        /* Compute CRC if not returning compressed data only */
        if (!(pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA))
            pState->file_crc32 = (mz_uint32)mz_crc32(pState->file_crc32, (const mz_uint8 *)pvBuf, copied_to_caller);
#endif

        /* Advance offsets, dec counters */
        pState->cur_file_ofs += copied_to_caller;
        pState->out_buf_ofs += copied_to_caller;
        pState->comp_remaining -= copied_to_caller;
    }
    else
    {
        do
        {
            /* Calc ptr to write buffer - given current output pos and block size */
            mz_uint8 *pWrite_buf_cur = (mz_uint8 *)pState->pWrite_buf + (pState->out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1));

            /* Calc max output size - given current output pos and block size */
            size_t in_buf_size, out_buf_size = TINFL_LZ_DICT_SIZE - (pState->out_buf_ofs & (TINFL_LZ_DICT_SIZE - 1));

            if (!pState->out_blk_remain)
            {
                /* Read more data from file if none available (and reading from file) */
                if ((!pState->read_buf_avail) && (!pState->pZip->m_pState->m_pMem))
                {
                    /* Calc read size */
                    pState->read_buf_avail = MZ_MIN(pState->read_buf_size, pState->comp_remaining);
                    if (pState->pZip->m_pRead(pState->pZip->m_pIO_opaque, pState->cur_file_ofs, pState->pRead_buf, (size_t)pState->read_buf_avail) != pState->read_buf_avail)
                    {
                        mz_zip_set_error(pState->pZip, MZ_ZIP_FILE_READ_FAILED);
                        pState->status = TINFL_STATUS_FAILED;
                        break;
                    }

                    /* Advance offsets, dec counters */
                    pState->cur_file_ofs += pState->read_buf_avail;
                    pState->comp_remaining -= pState->read_buf_avail;
                    pState->read_buf_ofs = 0;
                }

                /* Perform decompression */
                in_buf_size = (size_t)pState->read_buf_avail;
                pState->status = tinfl_decompress(&pState->inflator, (const mz_uint8 *)pState->pRead_buf + pState->read_buf_ofs, &in_buf_size, (mz_uint8 *)pState->pWrite_buf, pWrite_buf_cur, &out_buf_size, pState->comp_remaining ? TINFL_FLAG_HAS_MORE_INPUT : 0);
                pState->read_buf_avail -= in_buf_size;
                pState->read_buf_ofs += in_buf_size;

                /* Update current output block size remaining */
                pState->out_blk_remain = out_buf_size;
            }

            if (pState->out_blk_remain)
            {
                /* Calc amount to return. */
                size_t to_copy = MZ_MIN( (buf_size - copied_to_caller), pState->out_blk_remain );

                /* Copy data to caller's buffer */
                memcpy( (uint8_t*)pvBuf + copied_to_caller, pWrite_buf_cur, to_copy );

#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
                /* Perform CRC */
                pState->file_crc32 = (mz_uint32)mz_crc32(pState->file_crc32, pWrite_buf_cur, to_copy);
#endif

                /* Decrement data consumed from block */
                pState->out_blk_remain -= to_copy;

                /* Inc output offset, while performing sanity check */
                if ((pState->out_buf_ofs += to_copy) > pState->file_stat.m_uncomp_size)
                {
                    mz_zip_set_error(pState->pZip, MZ_ZIP_DECOMPRESSION_FAILED);
                    pState->status = TINFL_STATUS_FAILED;
                    break;
                }

                /* Increment counter of data copied to caller */
                copied_to_caller += to_copy;
            }
        } while ( (copied_to_caller < buf_size) && ((pState->status == TINFL_STATUS_NEEDS_MORE_INPUT) || (pState->status == TINFL_STATUS_HAS_MORE_OUTPUT)) );
    }

    /* Return how many bytes were copied into user buffer */
    return copied_to_caller;
}

mz_bool mz_zip_reader_extract_iter_free(mz_zip_reader_extract_iter_state* pState)
{
    int status;

    /* Argument sanity check */
    if ((!pState) || (!pState->pZip) || (!pState->pZip->m_pState))
        return MZ_FALSE;

    /* Was decompression completed and requested? */
    if ((pState->status == TINFL_STATUS_DONE) && (!(pState->flags & MZ_ZIP_FLAG_COMPRESSED_DATA)))
    {
        /* Make sure the entire file was decompressed, and check its CRC. */
        if (pState->out_buf_ofs != pState->file_stat.m_uncomp_size)
        {
            mz_zip_set_error(pState->pZip, MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE);
            pState->status = TINFL_STATUS_FAILED;
        }
#ifndef MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
        else if (pState->file_crc32 != pState->file_stat.m_crc32)
        {
            mz_zip_set_error(pState->pZip, MZ_ZIP_DECOMPRESSION_FAILED);
            pState->status = TINFL_STATUS_FAILED;
        }
#endif
    }

    /* Free buffers */
    if (!pState->pZip->m_pState->m_pMem)
        pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState->pRead_buf);
    if (pState->pWrite_buf)
        pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState->pWrite_buf);

    /* Save status */
    status = pState->status;

    /* Free context */
    pState->pZip->m_pFree(pState->pZip->m_pAlloc_opaque, pState);

    return status == TINFL_STATUS_DONE;
}

#ifndef MINIZ_NO_STDIO
static size_t mz_zip_file_write_callback(void *pOpaque, mz_uint64 ofs, const void *pBuf, size_t n)
{
    (void)ofs;

    return MZ_FWRITE(pBuf, 1, n, (MZ_FILE *)pOpaque);
}

mz_bool mz_zip_reader_extract_to_file(mz_zip_archive *pZip, mz_uint file_index, const char *pDst_filename, mz_uint flags)
{
    mz_bool status;
    mz_zip_archive_file_stat file_stat;
    MZ_FILE *pFile;

    if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat))
        return MZ_FALSE;

    if ((file_stat.m_is_directory) || (!file_stat.m_is_supported))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE);

    pFile = MZ_FOPEN(pDst_filename, "wb");
    if (!pFile)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);

    status = mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_file_write_callback, pFile, flags);

    if (MZ_FCLOSE(pFile) == EOF)
    {
        if (status)
            mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED);

        status = MZ_FALSE;
    }

#if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_STDIO)
    if (status)
        mz_zip_set_file_times(pDst_filename, file_stat.m_time, file_stat.m_time);
#endif

    return status;
}

mz_bool mz_zip_reader_extract_file_to_file(mz_zip_archive *pZip, const char *pArchive_filename, const char *pDst_filename, mz_uint flags)
{
    mz_uint32 file_index;
    if (!mz_zip_reader_locate_file_v2(pZip, pArchive_filename, NULL, flags, &file_index))
        return MZ_FALSE;

    return mz_zip_reader_extract_to_file(pZip, file_index, pDst_filename, flags);
}

mz_bool mz_zip_reader_extract_to_cfile(mz_zip_archive *pZip, mz_uint file_index, MZ_FILE *pFile, mz_uint flags)
{
    mz_zip_archive_file_stat file_stat;

    if (!mz_zip_reader_file_stat(pZip, file_index, &file_stat))
        return MZ_FALSE;

    if ((file_stat.m_is_directory) || (!file_stat.m_is_supported))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE);

    return mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_file_write_callback, pFile, flags);
}

mz_bool mz_zip_reader_extract_file_to_cfile(mz_zip_archive *pZip, const char *pArchive_filename, MZ_FILE *pFile, mz_uint flags)
{
    mz_uint32 file_index;
    if (!mz_zip_reader_locate_file_v2(pZip, pArchive_filename, NULL, flags, &file_index))
        return MZ_FALSE;

    return mz_zip_reader_extract_to_cfile(pZip, file_index, pFile, flags);
}
#endif /* #ifndef MINIZ_NO_STDIO */

static size_t mz_zip_compute_crc32_callback(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n)
{
    mz_uint32 *p = (mz_uint32 *)pOpaque;
    (void)file_ofs;
    *p = (mz_uint32)mz_crc32(*p, (const mz_uint8 *)pBuf, n);
    return n;
}

mz_bool mz_zip_validate_file(mz_zip_archive *pZip, mz_uint file_index, mz_uint flags)
{
    mz_zip_archive_file_stat file_stat;
    mz_zip_internal_state *pState;
    const mz_uint8 *pCentral_dir_header;
    mz_bool found_zip64_ext_data_in_cdir = MZ_FALSE;
    mz_bool found_zip64_ext_data_in_ldir = MZ_FALSE;
    mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32;
    mz_uint64 local_header_ofs = 0;
    mz_uint32 local_header_filename_len, local_header_extra_len, local_header_crc32;
    mz_uint64 local_header_comp_size, local_header_uncomp_size;
    mz_uint32 uncomp_crc32 = MZ_CRC32_INIT;
    mz_bool has_data_descriptor;
    mz_uint32 local_header_bit_flags;

    mz_zip_array file_data_array;
    mz_zip_array_init(&file_data_array, 1);

    if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (file_index > pZip->m_total_files)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    pCentral_dir_header = mz_zip_get_cdh(pZip, file_index);

    if (!mz_zip_file_stat_internal(pZip, file_index, pCentral_dir_header, &file_stat, &found_zip64_ext_data_in_cdir))
        return MZ_FALSE;

    /* A directory or zero length file */
    if ((file_stat.m_is_directory) || (!file_stat.m_uncomp_size))
        return MZ_TRUE;

    /* Encryption and patch files are not supported. */
    if (file_stat.m_is_encrypted)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_ENCRYPTION);

    /* This function only supports stored and deflate. */
    if ((file_stat.m_method != 0) && (file_stat.m_method != MZ_DEFLATED))
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_METHOD);

    if (!file_stat.m_is_supported)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_FEATURE);

    /* Read and parse the local directory entry. */
    local_header_ofs = file_stat.m_local_header_ofs;
    if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

    if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    local_header_filename_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS);
    local_header_extra_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS);
    local_header_comp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS);
    local_header_uncomp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS);
    local_header_crc32 = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_CRC32_OFS);
    local_header_bit_flags = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_BIT_FLAG_OFS);
    has_data_descriptor = (local_header_bit_flags & 8) != 0;

    if (local_header_filename_len != strlen(file_stat.m_filename))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    if ((local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len + local_header_extra_len + file_stat.m_comp_size) > pZip->m_archive_size)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    if (!mz_zip_array_resize(pZip, &file_data_array, MZ_MAX(local_header_filename_len, local_header_extra_len), MZ_FALSE))
    {
        mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        goto handle_failure;
    }

    if (local_header_filename_len)
    {
        if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE, file_data_array.m_p, local_header_filename_len) != local_header_filename_len)
        {
            mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
            goto handle_failure;
        }

        /* I've seen 1 archive that had the same pathname, but used backslashes in the local dir and forward slashes in the central dir. Do we care about this? For now, this case will fail validation. */
        if (memcmp(file_stat.m_filename, file_data_array.m_p, local_header_filename_len) != 0)
        {
            mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED);
            goto handle_failure;
        }
    }

    if ((local_header_extra_len) && ((local_header_comp_size == MZ_UINT32_MAX) || (local_header_uncomp_size == MZ_UINT32_MAX)))
    {
        mz_uint32 extra_size_remaining = local_header_extra_len;
        const mz_uint8 *pExtra_data = (const mz_uint8 *)file_data_array.m_p;

        if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len, file_data_array.m_p, local_header_extra_len) != local_header_extra_len)
        {
            mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
            goto handle_failure;
        }

        do
        {
            mz_uint32 field_id, field_data_size, field_total_size;

            if (extra_size_remaining < (sizeof(mz_uint16) * 2))
            {
                mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
                goto handle_failure;
            }

            field_id = MZ_READ_LE16(pExtra_data);
            field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));
            field_total_size = field_data_size + sizeof(mz_uint16) * 2;

            if (field_total_size > extra_size_remaining)
            {
                mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
                goto handle_failure;
            }

            if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID)
            {
                const mz_uint8 *pSrc_field_data = pExtra_data + sizeof(mz_uint32);

                if (field_data_size < sizeof(mz_uint64) * 2)
                {
                    mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
                    goto handle_failure;
                }

                local_header_uncomp_size = MZ_READ_LE64(pSrc_field_data);
                local_header_comp_size = MZ_READ_LE64(pSrc_field_data + sizeof(mz_uint64));

                found_zip64_ext_data_in_ldir = MZ_TRUE;
                break;
            }

            pExtra_data += field_total_size;
            extra_size_remaining -= field_total_size;
        } while (extra_size_remaining);
    }

    /* TODO: parse local header extra data when local_header_comp_size is 0xFFFFFFFF! (big_descriptor.zip) */
    /* I've seen zips in the wild with the data descriptor bit set, but proper local header values and bogus data descriptors */
    if ((has_data_descriptor) && (!local_header_comp_size) && (!local_header_crc32))
    {
        mz_uint8 descriptor_buf[32];
        mz_bool has_id;
        const mz_uint8 *pSrc;
        mz_uint32 file_crc32;
        mz_uint64 comp_size = 0, uncomp_size = 0;

        mz_uint32 num_descriptor_uint32s = ((pState->m_zip64) || (found_zip64_ext_data_in_ldir)) ? 6 : 4;

        if (pZip->m_pRead(pZip->m_pIO_opaque, local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_len + local_header_extra_len + file_stat.m_comp_size, descriptor_buf, sizeof(mz_uint32) * num_descriptor_uint32s) != (sizeof(mz_uint32) * num_descriptor_uint32s))
        {
            mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
            goto handle_failure;
        }

        has_id = (MZ_READ_LE32(descriptor_buf) == MZ_ZIP_DATA_DESCRIPTOR_ID);
        pSrc = has_id ? (descriptor_buf + sizeof(mz_uint32)) : descriptor_buf;

        file_crc32 = MZ_READ_LE32(pSrc);

        if ((pState->m_zip64) || (found_zip64_ext_data_in_ldir))
        {
            comp_size = MZ_READ_LE64(pSrc + sizeof(mz_uint32));
            uncomp_size = MZ_READ_LE64(pSrc + sizeof(mz_uint32) + sizeof(mz_uint64));
        }
        else
        {
            comp_size = MZ_READ_LE32(pSrc + sizeof(mz_uint32));
            uncomp_size = MZ_READ_LE32(pSrc + sizeof(mz_uint32) + sizeof(mz_uint32));
        }

        if ((file_crc32 != file_stat.m_crc32) || (comp_size != file_stat.m_comp_size) || (uncomp_size != file_stat.m_uncomp_size))
        {
            mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED);
            goto handle_failure;
        }
    }
    else
    {
        if ((local_header_crc32 != file_stat.m_crc32) || (local_header_comp_size != file_stat.m_comp_size) || (local_header_uncomp_size != file_stat.m_uncomp_size))
        {
            mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED);
            goto handle_failure;
        }
    }

    mz_zip_array_clear(pZip, &file_data_array);

    if ((flags & MZ_ZIP_FLAG_VALIDATE_HEADERS_ONLY) == 0)
    {
        if (!mz_zip_reader_extract_to_callback(pZip, file_index, mz_zip_compute_crc32_callback, &uncomp_crc32, 0))
            return MZ_FALSE;

        /* 1 more check to be sure, although the extract checks too. */
        if (uncomp_crc32 != file_stat.m_crc32)
        {
            mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED);
            return MZ_FALSE;
        }
    }

    return MZ_TRUE;

handle_failure:
    mz_zip_array_clear(pZip, &file_data_array);
    return MZ_FALSE;
}

mz_bool mz_zip_validate_archive(mz_zip_archive *pZip, mz_uint flags)
{
    mz_zip_internal_state *pState;
    uint32_t i;

    if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    /* Basic sanity checks */
    if (!pState->m_zip64)
    {
        if (pZip->m_total_files > MZ_UINT16_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

        if (pZip->m_archive_size > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);
    }
    else
    {
        if (pZip->m_total_files >= MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

        if (pState->m_central_dir.m_size >= MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);
    }

    for (i = 0; i < pZip->m_total_files; i++)
    {
        if (MZ_ZIP_FLAG_VALIDATE_LOCATE_FILE_FLAG & flags)
        {
            mz_uint32 found_index;
            mz_zip_archive_file_stat stat;

            if (!mz_zip_reader_file_stat(pZip, i, &stat))
                return MZ_FALSE;

            if (!mz_zip_reader_locate_file_v2(pZip, stat.m_filename, NULL, 0, &found_index))
                return MZ_FALSE;

            /* This check can fail if there are duplicate filenames in the archive (which we don't check for when writing - that's up to the user) */
            if (found_index != i)
                return mz_zip_set_error(pZip, MZ_ZIP_VALIDATION_FAILED);
        }

        if (!mz_zip_validate_file(pZip, i, flags))
            return MZ_FALSE;
    }

    return MZ_TRUE;
}

mz_bool mz_zip_validate_mem_archive(const void *pMem, size_t size, mz_uint flags, mz_zip_error *pErr)
{
    mz_bool success = MZ_TRUE;
    mz_zip_archive zip;
    mz_zip_error actual_err = MZ_ZIP_NO_ERROR;

    if ((!pMem) || (!size))
    {
        if (pErr)
            *pErr = MZ_ZIP_INVALID_PARAMETER;
        return MZ_FALSE;
    }

    mz_zip_zero_struct(&zip);

    if (!mz_zip_reader_init_mem(&zip, pMem, size, flags))
    {
        if (pErr)
            *pErr = zip.m_last_error;
        return MZ_FALSE;
    }

    if (!mz_zip_validate_archive(&zip, flags))
    {
        actual_err = zip.m_last_error;
        success = MZ_FALSE;
    }

    if (!mz_zip_reader_end_internal(&zip, success))
    {
        if (!actual_err)
            actual_err = zip.m_last_error;
        success = MZ_FALSE;
    }

    if (pErr)
        *pErr = actual_err;

    return success;
}

#ifndef MINIZ_NO_STDIO
mz_bool mz_zip_validate_file_archive(const char *pFilename, mz_uint flags, mz_zip_error *pErr)
{
    mz_bool success = MZ_TRUE;
    mz_zip_archive zip;
    mz_zip_error actual_err = MZ_ZIP_NO_ERROR;

    if (!pFilename)
    {
        if (pErr)
            *pErr = MZ_ZIP_INVALID_PARAMETER;
        return MZ_FALSE;
    }

    mz_zip_zero_struct(&zip);

    if (!mz_zip_reader_init_file_v2(&zip, pFilename, flags, 0, 0))
    {
        if (pErr)
            *pErr = zip.m_last_error;
        return MZ_FALSE;
    }

    if (!mz_zip_validate_archive(&zip, flags))
    {
        actual_err = zip.m_last_error;
        success = MZ_FALSE;
    }

    if (!mz_zip_reader_end_internal(&zip, success))
    {
        if (!actual_err)
            actual_err = zip.m_last_error;
        success = MZ_FALSE;
    }

    if (pErr)
        *pErr = actual_err;

    return success;
}
#endif /* #ifndef MINIZ_NO_STDIO */

/* ------------------- .ZIP archive writing */

#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS

static MZ_FORCEINLINE void mz_write_le16(mz_uint8 *p, mz_uint16 v)
{
    p[0] = (mz_uint8)v;
    p[1] = (mz_uint8)(v >> 8);
}
static MZ_FORCEINLINE void mz_write_le32(mz_uint8 *p, mz_uint32 v)
{
    p[0] = (mz_uint8)v;
    p[1] = (mz_uint8)(v >> 8);
    p[2] = (mz_uint8)(v >> 16);
    p[3] = (mz_uint8)(v >> 24);
}
static MZ_FORCEINLINE void mz_write_le64(mz_uint8 *p, mz_uint64 v)
{
    mz_write_le32(p, (mz_uint32)v);
    mz_write_le32(p + sizeof(mz_uint32), (mz_uint32)(v >> 32));
}

#define MZ_WRITE_LE16(p, v) mz_write_le16((mz_uint8 *)(p), (mz_uint16)(v))
#define MZ_WRITE_LE32(p, v) mz_write_le32((mz_uint8 *)(p), (mz_uint32)(v))
#define MZ_WRITE_LE64(p, v) mz_write_le64((mz_uint8 *)(p), (mz_uint64)(v))

static size_t mz_zip_heap_write_func(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n)
{
    mz_zip_archive *pZip = (mz_zip_archive *)pOpaque;
    mz_zip_internal_state *pState = pZip->m_pState;
    mz_uint64 new_size = MZ_MAX(file_ofs + n, pState->m_mem_size);

    if (!n)
        return 0;

    /* An allocation this big is likely to just fail on 32-bit systems, so don't even go there. */
    if ((sizeof(size_t) == sizeof(mz_uint32)) && (new_size > 0x7FFFFFFF))
    {
        mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE);
        return 0;
    }

    if (new_size > pState->m_mem_capacity)
    {
        void *pNew_block;
        size_t new_capacity = MZ_MAX(64, pState->m_mem_capacity);

        while (new_capacity < new_size)
            new_capacity *= 2;

        if (NULL == (pNew_block = pZip->m_pRealloc(pZip->m_pAlloc_opaque, pState->m_pMem, 1, new_capacity)))
        {
            mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
            return 0;
        }

        pState->m_pMem = pNew_block;
        pState->m_mem_capacity = new_capacity;
    }
    memcpy((mz_uint8 *)pState->m_pMem + file_ofs, pBuf, n);
    pState->m_mem_size = (size_t)new_size;
    return n;
}

static mz_bool mz_zip_writer_end_internal(mz_zip_archive *pZip, mz_bool set_last_error)
{
    mz_zip_internal_state *pState;
    mz_bool status = MZ_TRUE;

    if ((!pZip) || (!pZip->m_pState) || (!pZip->m_pAlloc) || (!pZip->m_pFree) || ((pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) && (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED)))
    {
        if (set_last_error)
            mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return MZ_FALSE;
    }

    pState = pZip->m_pState;
    pZip->m_pState = NULL;
    mz_zip_array_clear(pZip, &pState->m_central_dir);
    mz_zip_array_clear(pZip, &pState->m_central_dir_offsets);
    mz_zip_array_clear(pZip, &pState->m_sorted_central_dir_offsets);

#ifndef MINIZ_NO_STDIO
    if (pState->m_pFile)
    {
        if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE)
        {
            if (MZ_FCLOSE(pState->m_pFile) == EOF)
            {
                if (set_last_error)
                    mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED);
                status = MZ_FALSE;
            }
        }

        pState->m_pFile = NULL;
    }
#endif /* #ifndef MINIZ_NO_STDIO */

    if ((pZip->m_pWrite == mz_zip_heap_write_func) && (pState->m_pMem))
    {
        pZip->m_pFree(pZip->m_pAlloc_opaque, pState->m_pMem);
        pState->m_pMem = NULL;
    }

    pZip->m_pFree(pZip->m_pAlloc_opaque, pState);
    pZip->m_zip_mode = MZ_ZIP_MODE_INVALID;
    return status;
}

mz_bool mz_zip_writer_init_v2(mz_zip_archive *pZip, mz_uint64 existing_size, mz_uint flags)
{
    mz_bool zip64 = (flags & MZ_ZIP_FLAG_WRITE_ZIP64) != 0;

    if ((!pZip) || (pZip->m_pState) || (!pZip->m_pWrite) || (pZip->m_zip_mode != MZ_ZIP_MODE_INVALID))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING)
    {
        if (!pZip->m_pRead)
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
    }

    if (pZip->m_file_offset_alignment)
    {
        /* Ensure user specified file offset alignment is a power of 2. */
        if (pZip->m_file_offset_alignment & (pZip->m_file_offset_alignment - 1))
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
    }

    if (!pZip->m_pAlloc)
        pZip->m_pAlloc = miniz_def_alloc_func;
    if (!pZip->m_pFree)
        pZip->m_pFree = miniz_def_free_func;
    if (!pZip->m_pRealloc)
        pZip->m_pRealloc = miniz_def_realloc_func;

    pZip->m_archive_size = existing_size;
    pZip->m_central_directory_file_ofs = 0;
    pZip->m_total_files = 0;

    if (NULL == (pZip->m_pState = (mz_zip_internal_state *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(mz_zip_internal_state))))
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    memset(pZip->m_pState, 0, sizeof(mz_zip_internal_state));

    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir, sizeof(mz_uint8));
    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_central_dir_offsets, sizeof(mz_uint32));
    MZ_ZIP_ARRAY_SET_ELEMENT_SIZE(&pZip->m_pState->m_sorted_central_dir_offsets, sizeof(mz_uint32));

    pZip->m_pState->m_zip64 = zip64;
    pZip->m_pState->m_zip64_has_extended_info_fields = zip64;

    pZip->m_zip_type = MZ_ZIP_TYPE_USER;
    pZip->m_zip_mode = MZ_ZIP_MODE_WRITING;

    return MZ_TRUE;
}

mz_bool mz_zip_writer_init(mz_zip_archive *pZip, mz_uint64 existing_size)
{
    return mz_zip_writer_init_v2(pZip, existing_size, 0);
}

mz_bool mz_zip_writer_init_heap_v2(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size, mz_uint flags)
{
    pZip->m_pWrite = mz_zip_heap_write_func;
    pZip->m_pNeeds_keepalive = NULL;

    if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING)
        pZip->m_pRead = mz_zip_mem_read_func;

    pZip->m_pIO_opaque = pZip;

    if (!mz_zip_writer_init_v2(pZip, size_to_reserve_at_beginning, flags))
        return MZ_FALSE;

    pZip->m_zip_type = MZ_ZIP_TYPE_HEAP;

    if (0 != (initial_allocation_size = MZ_MAX(initial_allocation_size, size_to_reserve_at_beginning)))
    {
        if (NULL == (pZip->m_pState->m_pMem = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, initial_allocation_size)))
        {
            mz_zip_writer_end_internal(pZip, MZ_FALSE);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }
        pZip->m_pState->m_mem_capacity = initial_allocation_size;
    }

    return MZ_TRUE;
}

mz_bool mz_zip_writer_init_heap(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size)
{
    return mz_zip_writer_init_heap_v2(pZip, size_to_reserve_at_beginning, initial_allocation_size, 0);
}

#ifndef MINIZ_NO_STDIO
static size_t mz_zip_file_write_func(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n)
{
    mz_zip_archive *pZip = (mz_zip_archive *)pOpaque;
    mz_int64 cur_ofs = MZ_FTELL64(pZip->m_pState->m_pFile);

    file_ofs += pZip->m_pState->m_file_archive_start_ofs;

    if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pZip->m_pState->m_pFile, (mz_int64)file_ofs, SEEK_SET))))
    {
        mz_zip_set_error(pZip, MZ_ZIP_FILE_SEEK_FAILED);
        return 0;
    }

    return MZ_FWRITE(pBuf, 1, n, pZip->m_pState->m_pFile);
}

mz_bool mz_zip_writer_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning)
{
    return mz_zip_writer_init_file_v2(pZip, pFilename, size_to_reserve_at_beginning, 0);
}

mz_bool mz_zip_writer_init_file_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning, mz_uint flags)
{
    MZ_FILE *pFile;

    pZip->m_pWrite = mz_zip_file_write_func;
    pZip->m_pNeeds_keepalive = NULL;

    if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING)
        pZip->m_pRead = mz_zip_file_read_func;

    pZip->m_pIO_opaque = pZip;

    if (!mz_zip_writer_init_v2(pZip, size_to_reserve_at_beginning, flags))
        return MZ_FALSE;

    if (NULL == (pFile = MZ_FOPEN(pFilename, (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING) ? "w+b" : "wb")))
    {
        mz_zip_writer_end(pZip);
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);
    }

    pZip->m_pState->m_pFile = pFile;
    pZip->m_zip_type = MZ_ZIP_TYPE_FILE;

    if (size_to_reserve_at_beginning)
    {
        mz_uint64 cur_ofs = 0;
        char buf[4096];

        MZ_CLEAR_OBJ(buf);

        do
        {
            size_t n = (size_t)MZ_MIN(sizeof(buf), size_to_reserve_at_beginning);
            if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_ofs, buf, n) != n)
            {
                mz_zip_writer_end(pZip);
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
            }
            cur_ofs += n;
            size_to_reserve_at_beginning -= n;
        } while (size_to_reserve_at_beginning);
    }

    return MZ_TRUE;
}

mz_bool mz_zip_writer_init_cfile(mz_zip_archive *pZip, MZ_FILE *pFile, mz_uint flags)
{
    pZip->m_pWrite = mz_zip_file_write_func;
    pZip->m_pNeeds_keepalive = NULL;

    if (flags & MZ_ZIP_FLAG_WRITE_ALLOW_READING)
        pZip->m_pRead = mz_zip_file_read_func;

    pZip->m_pIO_opaque = pZip;

    if (!mz_zip_writer_init_v2(pZip, 0, flags))
        return MZ_FALSE;

    pZip->m_pState->m_pFile = pFile;
    pZip->m_pState->m_file_archive_start_ofs = MZ_FTELL64(pZip->m_pState->m_pFile);
    pZip->m_zip_type = MZ_ZIP_TYPE_CFILE;

    return MZ_TRUE;
}
#endif /* #ifndef MINIZ_NO_STDIO */

mz_bool mz_zip_writer_init_from_reader_v2(mz_zip_archive *pZip, const char *pFilename, mz_uint flags)
{
    mz_zip_internal_state *pState;

    if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_READING))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (flags & MZ_ZIP_FLAG_WRITE_ZIP64)
    {
        /* We don't support converting a non-zip64 file to zip64 - this seems like more trouble than it's worth. (What about the existing 32-bit data descriptors that could follow the compressed data?) */
        if (!pZip->m_pState->m_zip64)
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
    }

    /* No sense in trying to write to an archive that's already at the support max size */
    if (pZip->m_pState->m_zip64)
    {
        if (pZip->m_total_files == MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }
    else
    {
        if (pZip->m_total_files == MZ_UINT16_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);

        if ((pZip->m_archive_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + MZ_ZIP_LOCAL_DIR_HEADER_SIZE) > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE);
    }

    pState = pZip->m_pState;

    if (pState->m_pFile)
    {
#ifdef MINIZ_NO_STDIO
        (void)pFilename;
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
#else
        if (pZip->m_pIO_opaque != pZip)
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

        if (pZip->m_zip_type == MZ_ZIP_TYPE_FILE)
        {
            if (!pFilename)
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

            /* Archive is being read from stdio and was originally opened only for reading. Try to reopen as writable. */
            if (NULL == (pState->m_pFile = MZ_FREOPEN(pFilename, "r+b", pState->m_pFile)))
            {
                /* The mz_zip_archive is now in a bogus state because pState->m_pFile is NULL, so just close it. */
                mz_zip_reader_end_internal(pZip, MZ_FALSE);
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);
            }
        }

        pZip->m_pWrite = mz_zip_file_write_func;
        pZip->m_pNeeds_keepalive = NULL;
#endif /* #ifdef MINIZ_NO_STDIO */
    }
    else if (pState->m_pMem)
    {
        /* Archive lives in a memory block. Assume it's from the heap that we can resize using the realloc callback. */
        if (pZip->m_pIO_opaque != pZip)
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

        pState->m_mem_capacity = pState->m_mem_size;
        pZip->m_pWrite = mz_zip_heap_write_func;
        pZip->m_pNeeds_keepalive = NULL;
    }
    /* Archive is being read via a user provided read function - make sure the user has specified a write function too. */
    else if (!pZip->m_pWrite)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    /* Start writing new files at the archive's current central directory location. */
    /* TODO: We could add a flag that lets the user start writing immediately AFTER the existing central dir - this would be safer. */
    pZip->m_archive_size = pZip->m_central_directory_file_ofs;
    pZip->m_central_directory_file_ofs = 0;

    /* Clear the sorted central dir offsets, they aren't useful or maintained now. */
    /* Even though we're now in write mode, files can still be extracted and verified, but file locates will be slow. */
    /* TODO: We could easily maintain the sorted central directory offsets. */
    mz_zip_array_clear(pZip, &pZip->m_pState->m_sorted_central_dir_offsets);

    pZip->m_zip_mode = MZ_ZIP_MODE_WRITING;

    return MZ_TRUE;
}

mz_bool mz_zip_writer_init_from_reader(mz_zip_archive *pZip, const char *pFilename)
{
    return mz_zip_writer_init_from_reader_v2(pZip, pFilename, 0);
}

/* TODO: pArchive_name is a terrible name here! */
mz_bool mz_zip_writer_add_mem(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, mz_uint level_and_flags)
{
    return mz_zip_writer_add_mem_ex(pZip, pArchive_name, pBuf, buf_size, NULL, 0, level_and_flags, 0, 0);
}

typedef struct
{
    mz_zip_archive *m_pZip;
    mz_uint64 m_cur_archive_file_ofs;
    mz_uint64 m_comp_size;
} mz_zip_writer_add_state;

static mz_bool mz_zip_writer_add_put_buf_callback(const void *pBuf, int len, void *pUser)
{
    mz_zip_writer_add_state *pState = (mz_zip_writer_add_state *)pUser;
    if ((int)pState->m_pZip->m_pWrite(pState->m_pZip->m_pIO_opaque, pState->m_cur_archive_file_ofs, pBuf, len) != len)
        return MZ_FALSE;

    pState->m_cur_archive_file_ofs += len;
    pState->m_comp_size += len;
    return MZ_TRUE;
}

#define MZ_ZIP64_MAX_LOCAL_EXTRA_FIELD_SIZE (sizeof(mz_uint16) * 2 + sizeof(mz_uint64) * 2)
#define MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE (sizeof(mz_uint16) * 2 + sizeof(mz_uint64) * 3)
static mz_uint32 mz_zip_writer_create_zip64_extra_data(mz_uint8 *pBuf, mz_uint64 *pUncomp_size, mz_uint64 *pComp_size, mz_uint64 *pLocal_header_ofs)
{
    mz_uint8 *pDst = pBuf;
    mz_uint32 field_size = 0;

    MZ_WRITE_LE16(pDst + 0, MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID);
    MZ_WRITE_LE16(pDst + 2, 0);
    pDst += sizeof(mz_uint16) * 2;

    if (pUncomp_size)
    {
        MZ_WRITE_LE64(pDst, *pUncomp_size);
        pDst += sizeof(mz_uint64);
        field_size += sizeof(mz_uint64);
    }

    if (pComp_size)
    {
        MZ_WRITE_LE64(pDst, *pComp_size);
        pDst += sizeof(mz_uint64);
        field_size += sizeof(mz_uint64);
    }

    if (pLocal_header_ofs)
    {
        MZ_WRITE_LE64(pDst, *pLocal_header_ofs);
        pDst += sizeof(mz_uint64);
        field_size += sizeof(mz_uint64);
    }

    MZ_WRITE_LE16(pBuf + 2, field_size);

    return (mz_uint32)(pDst - pBuf);
}

static mz_bool mz_zip_writer_create_local_dir_header(mz_zip_archive *pZip, mz_uint8 *pDst, mz_uint16 filename_size, mz_uint16 extra_size, mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32, mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date)
{
    (void)pZip;
    memset(pDst, 0, MZ_ZIP_LOCAL_DIR_HEADER_SIZE);
    MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_SIG_OFS, MZ_ZIP_LOCAL_DIR_HEADER_SIG);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_VERSION_NEEDED_OFS, method ? 20 : 0);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_BIT_FLAG_OFS, bit_flags);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_METHOD_OFS, method);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILE_TIME_OFS, dos_time);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILE_DATE_OFS, dos_date);
    MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_CRC32_OFS, uncomp_crc32);
    MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS, MZ_MIN(comp_size, MZ_UINT32_MAX));
    MZ_WRITE_LE32(pDst + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS, MZ_MIN(uncomp_size, MZ_UINT32_MAX));
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_FILENAME_LEN_OFS, filename_size);
    MZ_WRITE_LE16(pDst + MZ_ZIP_LDH_EXTRA_LEN_OFS, extra_size);
    return MZ_TRUE;
}

static mz_bool mz_zip_writer_create_central_dir_header(mz_zip_archive *pZip, mz_uint8 *pDst,
                                                       mz_uint16 filename_size, mz_uint16 extra_size, mz_uint16 comment_size,
                                                       mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32,
                                                       mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date,
                                                       mz_uint64 local_header_ofs, mz_uint32 ext_attributes)
{
    (void)pZip;
    memset(pDst, 0, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE);
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_SIG_OFS, MZ_ZIP_CENTRAL_DIR_HEADER_SIG);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_VERSION_NEEDED_OFS, method ? 20 : 0);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_BIT_FLAG_OFS, bit_flags);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_METHOD_OFS, method);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILE_TIME_OFS, dos_time);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILE_DATE_OFS, dos_date);
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_CRC32_OFS, uncomp_crc32);
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS, MZ_MIN(comp_size, MZ_UINT32_MAX));
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS, MZ_MIN(uncomp_size, MZ_UINT32_MAX));
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_FILENAME_LEN_OFS, filename_size);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_EXTRA_LEN_OFS, extra_size);
    MZ_WRITE_LE16(pDst + MZ_ZIP_CDH_COMMENT_LEN_OFS, comment_size);
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_EXTERNAL_ATTR_OFS, ext_attributes);
    MZ_WRITE_LE32(pDst + MZ_ZIP_CDH_LOCAL_HEADER_OFS, MZ_MIN(local_header_ofs, MZ_UINT32_MAX));
    return MZ_TRUE;
}

static mz_bool mz_zip_writer_add_to_central_dir(mz_zip_archive *pZip, const char *pFilename, mz_uint16 filename_size,
                                                const void *pExtra, mz_uint16 extra_size, const void *pComment, mz_uint16 comment_size,
                                                mz_uint64 uncomp_size, mz_uint64 comp_size, mz_uint32 uncomp_crc32,
                                                mz_uint16 method, mz_uint16 bit_flags, mz_uint16 dos_time, mz_uint16 dos_date,
                                                mz_uint64 local_header_ofs, mz_uint32 ext_attributes,
                                                const char *user_extra_data, mz_uint user_extra_data_len)
{
    mz_zip_internal_state *pState = pZip->m_pState;
    mz_uint32 central_dir_ofs = (mz_uint32)pState->m_central_dir.m_size;
    size_t orig_central_dir_size = pState->m_central_dir.m_size;
    mz_uint8 central_dir_header[MZ_ZIP_CENTRAL_DIR_HEADER_SIZE];

    if (!pZip->m_pState->m_zip64)
    {
        if (local_header_ofs > 0xFFFFFFFF)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_TOO_LARGE);
    }

    /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */
    if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + filename_size + extra_size + user_extra_data_len + comment_size) >= MZ_UINT32_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);

    if (!mz_zip_writer_create_central_dir_header(pZip, central_dir_header, filename_size, (mz_uint16)(extra_size + user_extra_data_len), comment_size, uncomp_size, comp_size, uncomp_crc32, method, bit_flags, dos_time, dos_date, local_header_ofs, ext_attributes))
        return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

    if ((!mz_zip_array_push_back(pZip, &pState->m_central_dir, central_dir_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE)) ||
        (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pFilename, filename_size)) ||
        (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pExtra, extra_size)) ||
        (!mz_zip_array_push_back(pZip, &pState->m_central_dir, user_extra_data, user_extra_data_len)) ||
        (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pComment, comment_size)) ||
        (!mz_zip_array_push_back(pZip, &pState->m_central_dir_offsets, &central_dir_ofs, 1)))
    {
        /* Try to resize the central directory array back into its original state. */
        mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
    }

    return MZ_TRUE;
}

static mz_bool mz_zip_writer_validate_archive_name(const char *pArchive_name)
{
    /* Basic ZIP archive filename validity checks: Valid filenames cannot start with a forward slash, cannot contain a drive letter, and cannot use DOS-style backward slashes. */
    if (*pArchive_name == '/')
        return MZ_FALSE;

    /* Making sure the name does not contain drive letters or DOS style backward slashes is the responsibility of the program using miniz*/

    return MZ_TRUE;
}

static mz_uint mz_zip_writer_compute_padding_needed_for_file_alignment(mz_zip_archive *pZip)
{
    mz_uint32 n;
    if (!pZip->m_file_offset_alignment)
        return 0;
    n = (mz_uint32)(pZip->m_archive_size & (pZip->m_file_offset_alignment - 1));
    return (mz_uint)((pZip->m_file_offset_alignment - n) & (pZip->m_file_offset_alignment - 1));
}

static mz_bool mz_zip_writer_write_zeros(mz_zip_archive *pZip, mz_uint64 cur_file_ofs, mz_uint32 n)
{
    char buf[4096];
    memset(buf, 0, MZ_MIN(sizeof(buf), n));
    while (n)
    {
        mz_uint32 s = MZ_MIN(sizeof(buf), n);
        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_file_ofs, buf, s) != s)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_file_ofs += s;
        n -= s;
    }
    return MZ_TRUE;
}

mz_bool mz_zip_writer_add_mem_ex(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags,
                                 mz_uint64 uncomp_size, mz_uint32 uncomp_crc32)
{
    return mz_zip_writer_add_mem_ex_v2(pZip, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, uncomp_size, uncomp_crc32, NULL, NULL, 0, NULL, 0);
}

mz_bool mz_zip_writer_add_mem_ex_v2(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size,
                                    mz_uint level_and_flags, mz_uint64 uncomp_size, mz_uint32 uncomp_crc32, MZ_TIME_T *last_modified,
                                    const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len)
{
    mz_uint16 method = 0, dos_time = 0, dos_date = 0;
    mz_uint level, ext_attributes = 0, num_alignment_padding_bytes;
    mz_uint64 local_dir_header_ofs = pZip->m_archive_size, cur_archive_file_ofs = pZip->m_archive_size, comp_size = 0;
    size_t archive_name_size;
    mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE];
    tdefl_compressor *pComp = NULL;
    mz_bool store_data_uncompressed;
    mz_zip_internal_state *pState;
    mz_uint8 *pExtra_data = NULL;
    mz_uint32 extra_size = 0;
    mz_uint8 extra_data[MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE];
    mz_uint16 bit_flags = 0;

    if ((int)level_and_flags < 0)
        level_and_flags = MZ_DEFAULT_LEVEL;

    if (uncomp_size || (buf_size && !(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)))
        bit_flags |= MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR;

    if (!(level_and_flags & MZ_ZIP_FLAG_ASCII_FILENAME))
        bit_flags |= MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8;

    level = level_and_flags & 0xF;
    store_data_uncompressed = ((!level) || (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA));

    if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || ((buf_size) && (!pBuf)) || (!pArchive_name) || ((comment_size) && (!pComment)) || (level > MZ_UBER_COMPRESSION))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    if (pState->m_zip64)
    {
        if (pZip->m_total_files == MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }
    else
    {
        if (pZip->m_total_files == MZ_UINT16_MAX)
        {
            pState->m_zip64 = MZ_TRUE;
            /*return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); */
        }
        if ((buf_size > 0xFFFFFFFF) || (uncomp_size > 0xFFFFFFFF))
        {
            pState->m_zip64 = MZ_TRUE;
            /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */
        }
    }

    if ((!(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)) && (uncomp_size))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_writer_validate_archive_name(pArchive_name))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME);

#ifndef MINIZ_NO_TIME
    if (last_modified != NULL)
    {
        mz_zip_time_t_to_dos_time(*last_modified, &dos_time, &dos_date);
    }
    else
    {
        MZ_TIME_T cur_time;
        time(&cur_time);
        mz_zip_time_t_to_dos_time(cur_time, &dos_time, &dos_date);
    }
#endif /* #ifndef MINIZ_NO_TIME */

	if (!(level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA))
	{
		uncomp_crc32 = (mz_uint32)mz_crc32(MZ_CRC32_INIT, (const mz_uint8 *)pBuf, buf_size);
		uncomp_size = buf_size;
		if (uncomp_size <= 3)
		{
			level = 0;
			store_data_uncompressed = MZ_TRUE;
		}
	}

    archive_name_size = strlen(pArchive_name);
    if (archive_name_size > MZ_UINT16_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME);

    num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip);

    /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */
    if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE + comment_size) >= MZ_UINT32_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);

    if (!pState->m_zip64)
    {
        /* Bail early if the archive would obviously become too large */
        if ((pZip->m_archive_size + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + archive_name_size
			+ MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + comment_size + user_extra_data_len +
			pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + user_extra_data_central_len
			+ MZ_ZIP_DATA_DESCRIPTER_SIZE32) > 0xFFFFFFFF)
        {
            pState->m_zip64 = MZ_TRUE;
            /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */
        }
    }

    if ((archive_name_size) && (pArchive_name[archive_name_size - 1] == '/'))
    {
        /* Set DOS Subdirectory attribute bit. */
        ext_attributes |= MZ_ZIP_DOS_DIR_ATTRIBUTE_BITFLAG;

        /* Subdirectories cannot contain data. */
        if ((buf_size) || (uncomp_size))
            return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
    }

    /* Try to do any allocations before writing to the archive, so if an allocation fails the file remains unmodified. (A good idea if we're doing an in-place modification.) */
    if ((!mz_zip_array_ensure_room(pZip, &pState->m_central_dir, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + comment_size + (pState->m_zip64 ? MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE : 0))) || (!mz_zip_array_ensure_room(pZip, &pState->m_central_dir_offsets, 1)))
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    if ((!store_data_uncompressed) && (buf_size))
    {
        if (NULL == (pComp = (tdefl_compressor *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(tdefl_compressor))))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
    }

    if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes))
    {
        pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
        return MZ_FALSE;
    }

    local_dir_header_ofs += num_alignment_padding_bytes;
    if (pZip->m_file_offset_alignment)
    {
        MZ_ASSERT((local_dir_header_ofs & (pZip->m_file_offset_alignment - 1)) == 0);
    }
    cur_archive_file_ofs += num_alignment_padding_bytes;

    MZ_CLEAR_OBJ(local_dir_header);

    if (!store_data_uncompressed || (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA))
    {
        method = MZ_DEFLATED;
    }

    if (pState->m_zip64)
    {
        if (uncomp_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX)
        {
            pExtra_data = extra_data;
            extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
                                                               (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
        }

        if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len), 0, 0, 0, method, bit_flags, dos_time, dos_date))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, local_dir_header_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += sizeof(local_dir_header);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }
        cur_archive_file_ofs += archive_name_size;

        if (pExtra_data != NULL)
        {
            if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, extra_data, extra_size) != extra_size)
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

            cur_archive_file_ofs += extra_size;
        }
    }
    else
    {
        if ((comp_size > MZ_UINT32_MAX) || (cur_archive_file_ofs > MZ_UINT32_MAX))
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);
        if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)user_extra_data_len, 0, 0, 0, method, bit_flags, dos_time, dos_date))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, local_dir_header_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += sizeof(local_dir_header);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }
        cur_archive_file_ofs += archive_name_size;
    }

	if (user_extra_data_len > 0)
	{
		if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, user_extra_data, user_extra_data_len) != user_extra_data_len)
			return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

		cur_archive_file_ofs += user_extra_data_len;
	}

    if (store_data_uncompressed)
    {
        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pBuf, buf_size) != buf_size)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }

        cur_archive_file_ofs += buf_size;
        comp_size = buf_size;
    }
    else if (buf_size)
    {
        mz_zip_writer_add_state state;

        state.m_pZip = pZip;
        state.m_cur_archive_file_ofs = cur_archive_file_ofs;
        state.m_comp_size = 0;

        if ((tdefl_init(pComp, mz_zip_writer_add_put_buf_callback, &state, tdefl_create_comp_flags_from_zip_params(level, -15, MZ_DEFAULT_STRATEGY)) != TDEFL_STATUS_OKAY) ||
            (tdefl_compress_buffer(pComp, pBuf, buf_size, TDEFL_FINISH) != TDEFL_STATUS_DONE))
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
            return mz_zip_set_error(pZip, MZ_ZIP_COMPRESSION_FAILED);
        }

        comp_size = state.m_comp_size;
        cur_archive_file_ofs = state.m_cur_archive_file_ofs;
    }

    pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
    pComp = NULL;

    if (uncomp_size)
    {
        mz_uint8 local_dir_footer[MZ_ZIP_DATA_DESCRIPTER_SIZE64];
        mz_uint32 local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE32;

        MZ_ASSERT(bit_flags & MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR);

        MZ_WRITE_LE32(local_dir_footer + 0, MZ_ZIP_DATA_DESCRIPTOR_ID);
        MZ_WRITE_LE32(local_dir_footer + 4, uncomp_crc32);
        if (pExtra_data == NULL)
        {
            if (comp_size > MZ_UINT32_MAX)
                return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

            MZ_WRITE_LE32(local_dir_footer + 8, comp_size);
            MZ_WRITE_LE32(local_dir_footer + 12, uncomp_size);
        }
        else
        {
            MZ_WRITE_LE64(local_dir_footer + 8, comp_size);
            MZ_WRITE_LE64(local_dir_footer + 16, uncomp_size);
            local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE64;
        }

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_footer, local_dir_footer_size) != local_dir_footer_size)
            return MZ_FALSE;

        cur_archive_file_ofs += local_dir_footer_size;
    }

    if (pExtra_data != NULL)
    {
        extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
                                                           (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
    }

    if (!mz_zip_writer_add_to_central_dir(pZip, pArchive_name, (mz_uint16)archive_name_size, pExtra_data, (mz_uint16)extra_size, pComment,
                                          comment_size, uncomp_size, comp_size, uncomp_crc32, method, bit_flags, dos_time, dos_date, local_dir_header_ofs, ext_attributes,
                                          user_extra_data_central, user_extra_data_central_len))
        return MZ_FALSE;

    pZip->m_total_files++;
    pZip->m_archive_size = cur_archive_file_ofs;

    return MZ_TRUE;
}

mz_bool mz_zip_writer_add_read_buf_callback(mz_zip_archive *pZip, const char *pArchive_name, mz_file_read_func read_callback, void* callback_opaque, mz_uint64 max_size, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags,
                                const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len)
{
    mz_uint16 gen_flags = (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE) ? 0 : MZ_ZIP_LDH_BIT_FLAG_HAS_LOCATOR;
    mz_uint uncomp_crc32 = MZ_CRC32_INIT, level, num_alignment_padding_bytes;
    mz_uint16 method = 0, dos_time = 0, dos_date = 0, ext_attributes = 0;
    mz_uint64 local_dir_header_ofs, cur_archive_file_ofs = pZip->m_archive_size, uncomp_size = 0, comp_size = 0;
    size_t archive_name_size;
    mz_uint8 local_dir_header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE];
    mz_uint8 *pExtra_data = NULL;
    mz_uint32 extra_size = 0;
    mz_uint8 extra_data[MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE];
    mz_zip_internal_state *pState;
    mz_uint64 file_ofs = 0, cur_archive_header_file_ofs;

    if (!(level_and_flags & MZ_ZIP_FLAG_ASCII_FILENAME))
        gen_flags |= MZ_ZIP_GENERAL_PURPOSE_BIT_FLAG_UTF8;

    if ((int)level_and_flags < 0)
        level_and_flags = MZ_DEFAULT_LEVEL;
    level = level_and_flags & 0xF;

    /* Sanity checks */
    if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || (!pArchive_name) || ((comment_size) && (!pComment)) || (level > MZ_UBER_COMPRESSION))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    if ((!pState->m_zip64) && (max_size > MZ_UINT32_MAX))
    {
        /* Source file is too large for non-zip64 */
        /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */
        pState->m_zip64 = MZ_TRUE;
    }

    /* We could support this, but why? */
    if (level_and_flags & MZ_ZIP_FLAG_COMPRESSED_DATA)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_writer_validate_archive_name(pArchive_name))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME);

    if (pState->m_zip64)
    {
        if (pZip->m_total_files == MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }
    else
    {
        if (pZip->m_total_files == MZ_UINT16_MAX)
        {
            pState->m_zip64 = MZ_TRUE;
            /*return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES); */
        }
    }

    archive_name_size = strlen(pArchive_name);
    if (archive_name_size > MZ_UINT16_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_FILENAME);

    num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip);

    /* miniz doesn't support central dirs >= MZ_UINT32_MAX bytes yet */
    if (((mz_uint64)pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP64_MAX_CENTRAL_EXTRA_FIELD_SIZE + comment_size) >= MZ_UINT32_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);

    if (!pState->m_zip64)
    {
        /* Bail early if the archive would obviously become too large */
        if ((pZip->m_archive_size + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + archive_name_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE
			+ archive_name_size + comment_size + user_extra_data_len + pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + 1024
			+ MZ_ZIP_DATA_DESCRIPTER_SIZE32 + user_extra_data_central_len) > 0xFFFFFFFF)
        {
            pState->m_zip64 = MZ_TRUE;
            /*return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE); */
        }
    }

#ifndef MINIZ_NO_TIME
    if (pFile_time)
    {
        mz_zip_time_t_to_dos_time(*pFile_time, &dos_time, &dos_date);
    }
#endif

    if (max_size <= 3)
        level = 0;

    if (!mz_zip_writer_write_zeros(pZip, cur_archive_file_ofs, num_alignment_padding_bytes))
    {
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
    }

    cur_archive_file_ofs += num_alignment_padding_bytes;
    local_dir_header_ofs = cur_archive_file_ofs;

    if (pZip->m_file_offset_alignment)
    {
        MZ_ASSERT((cur_archive_file_ofs & (pZip->m_file_offset_alignment - 1)) == 0);
    }

    if (max_size && level)
    {
        method = MZ_DEFLATED;
    }

    MZ_CLEAR_OBJ(local_dir_header);
    if (pState->m_zip64)
    {
        if (max_size >= MZ_UINT32_MAX || local_dir_header_ofs >= MZ_UINT32_MAX)
        {
            pExtra_data = extra_data;
            if (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE)
                extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (max_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
                                                               (max_size >= MZ_UINT32_MAX) ? &comp_size : NULL,
                                                                (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
            else
                extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, NULL,
                                                                   NULL,
                                                                   (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
        }

        if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len), 0, 0, 0, method, gen_flags, dos_time, dos_date))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += sizeof(local_dir_header);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
        {
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }

        cur_archive_file_ofs += archive_name_size;

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, extra_data, extra_size) != extra_size)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += extra_size;
    }
    else
    {
        if ((comp_size > MZ_UINT32_MAX) || (cur_archive_file_ofs > MZ_UINT32_MAX))
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);
        if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header, (mz_uint16)archive_name_size, (mz_uint16)user_extra_data_len, 0, 0, 0, method, gen_flags, dos_time, dos_date))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += sizeof(local_dir_header);

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
        {
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }

        cur_archive_file_ofs += archive_name_size;
    }

    if (user_extra_data_len > 0)
    {
        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, user_extra_data, user_extra_data_len) != user_extra_data_len)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        cur_archive_file_ofs += user_extra_data_len;
    }

    if (max_size)
    {
        void *pRead_buf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, MZ_ZIP_MAX_IO_BUF_SIZE);
        if (!pRead_buf)
        {
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (!level)
        {
            while (1)
            {
                size_t n = read_callback(callback_opaque, file_ofs, pRead_buf, MZ_ZIP_MAX_IO_BUF_SIZE);
                if (n == 0)
                    break;

                if ((n > MZ_ZIP_MAX_IO_BUF_SIZE) || (file_ofs + n > max_size))
                {
                    pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
                    return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
                }
                if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, pRead_buf, n) != n)
                {
                    pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
                    return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
                }
                file_ofs += n;
                uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n);
                cur_archive_file_ofs += n;
            }
            uncomp_size = file_ofs;
            comp_size = uncomp_size;
        }
        else
        {
            mz_bool result = MZ_FALSE;
            mz_zip_writer_add_state state;
            tdefl_compressor *pComp = (tdefl_compressor *)pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, sizeof(tdefl_compressor));
            if (!pComp)
            {
                pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
                return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
            }

            state.m_pZip = pZip;
            state.m_cur_archive_file_ofs = cur_archive_file_ofs;
            state.m_comp_size = 0;

            if (tdefl_init(pComp, mz_zip_writer_add_put_buf_callback, &state, tdefl_create_comp_flags_from_zip_params(level, -15, MZ_DEFAULT_STRATEGY)) != TDEFL_STATUS_OKAY)
            {
                pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);
                pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
                return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);
            }

            for (;;)
            {
                tdefl_status status;
                tdefl_flush flush = TDEFL_NO_FLUSH;

                size_t n = read_callback(callback_opaque, file_ofs, pRead_buf, MZ_ZIP_MAX_IO_BUF_SIZE);
                if ((n > MZ_ZIP_MAX_IO_BUF_SIZE) || (file_ofs + n > max_size))
                {
                    mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
                    break;
                }

                file_ofs += n;
                uncomp_crc32 = (mz_uint32)mz_crc32(uncomp_crc32, (const mz_uint8 *)pRead_buf, n);

                if (pZip->m_pNeeds_keepalive != NULL && pZip->m_pNeeds_keepalive(pZip->m_pIO_opaque))
                    flush = TDEFL_FULL_FLUSH;

                if (n == 0)
                    flush = TDEFL_FINISH;

                status = tdefl_compress_buffer(pComp, pRead_buf, n, flush);
                if (status == TDEFL_STATUS_DONE)
                {
                    result = MZ_TRUE;
                    break;
                }
                else if (status != TDEFL_STATUS_OKAY)
                {
                    mz_zip_set_error(pZip, MZ_ZIP_COMPRESSION_FAILED);
                    break;
                }
            }

            pZip->m_pFree(pZip->m_pAlloc_opaque, pComp);

            if (!result)
            {
                pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
                return MZ_FALSE;
            }

            uncomp_size = file_ofs;
            comp_size = state.m_comp_size;
            cur_archive_file_ofs = state.m_cur_archive_file_ofs;
        }

        pZip->m_pFree(pZip->m_pAlloc_opaque, pRead_buf);
    }

    if (!(level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE))
    {
        mz_uint8 local_dir_footer[MZ_ZIP_DATA_DESCRIPTER_SIZE64];
        mz_uint32 local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE32;

        MZ_WRITE_LE32(local_dir_footer + 0, MZ_ZIP_DATA_DESCRIPTOR_ID);
        MZ_WRITE_LE32(local_dir_footer + 4, uncomp_crc32);
        if (pExtra_data == NULL)
        {
            if (comp_size > MZ_UINT32_MAX)
                return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

            MZ_WRITE_LE32(local_dir_footer + 8, comp_size);
            MZ_WRITE_LE32(local_dir_footer + 12, uncomp_size);
        }
        else
        {
            MZ_WRITE_LE64(local_dir_footer + 8, comp_size);
            MZ_WRITE_LE64(local_dir_footer + 16, uncomp_size);
            local_dir_footer_size = MZ_ZIP_DATA_DESCRIPTER_SIZE64;
        }

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_file_ofs, local_dir_footer, local_dir_footer_size) != local_dir_footer_size)
            return MZ_FALSE;

        cur_archive_file_ofs += local_dir_footer_size;
    }

    if (level_and_flags & MZ_ZIP_FLAG_WRITE_HEADER_SET_SIZE)
    {
        if (pExtra_data != NULL)
        {
            extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (max_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
                                                               (max_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
        }

        if (!mz_zip_writer_create_local_dir_header(pZip, local_dir_header,
                                                   (mz_uint16)archive_name_size, (mz_uint16)(extra_size + user_extra_data_len),
                                                   (max_size >= MZ_UINT32_MAX) ? MZ_UINT32_MAX : uncomp_size, 
                                                    (max_size >= MZ_UINT32_MAX) ? MZ_UINT32_MAX : comp_size,
                                                   uncomp_crc32, method, gen_flags, dos_time, dos_date))
            return mz_zip_set_error(pZip, MZ_ZIP_INTERNAL_ERROR);

        cur_archive_header_file_ofs = local_dir_header_ofs;

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, local_dir_header, sizeof(local_dir_header)) != sizeof(local_dir_header))
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        if (pExtra_data != NULL)
        {
            cur_archive_header_file_ofs += sizeof(local_dir_header);

            if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, pArchive_name, archive_name_size) != archive_name_size)
            {
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
            }

            cur_archive_header_file_ofs += archive_name_size;

            if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_archive_header_file_ofs, extra_data, extra_size) != extra_size)
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

            cur_archive_header_file_ofs += extra_size;
        }
    }

    if (pExtra_data != NULL)
    {
        extra_size = mz_zip_writer_create_zip64_extra_data(extra_data, (uncomp_size >= MZ_UINT32_MAX) ? &uncomp_size : NULL,
                                                           (uncomp_size >= MZ_UINT32_MAX) ? &comp_size : NULL, (local_dir_header_ofs >= MZ_UINT32_MAX) ? &local_dir_header_ofs : NULL);
    }

    if (!mz_zip_writer_add_to_central_dir(pZip, pArchive_name, (mz_uint16)archive_name_size, pExtra_data, (mz_uint16)extra_size, pComment, comment_size,
                                          uncomp_size, comp_size, uncomp_crc32, method, gen_flags, dos_time, dos_date, local_dir_header_ofs, ext_attributes,
                                          user_extra_data_central, user_extra_data_central_len))
        return MZ_FALSE;

    pZip->m_total_files++;
    pZip->m_archive_size = cur_archive_file_ofs;

    return MZ_TRUE;
}

#ifndef MINIZ_NO_STDIO

static size_t mz_file_read_func_stdio(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n)
{
	MZ_FILE *pSrc_file = (MZ_FILE *)pOpaque;
	mz_int64 cur_ofs = MZ_FTELL64(pSrc_file);

	if (((mz_int64)file_ofs < 0) || (((cur_ofs != (mz_int64)file_ofs)) && (MZ_FSEEK64(pSrc_file, (mz_int64)file_ofs, SEEK_SET))))
		return 0;

	return MZ_FREAD(pBuf, 1, n, pSrc_file);
}

mz_bool mz_zip_writer_add_cfile(mz_zip_archive *pZip, const char *pArchive_name, MZ_FILE *pSrc_file, mz_uint64 max_size, const MZ_TIME_T *pFile_time, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags,
	const char *user_extra_data, mz_uint user_extra_data_len, const char *user_extra_data_central, mz_uint user_extra_data_central_len)
{
	return mz_zip_writer_add_read_buf_callback(pZip, pArchive_name, mz_file_read_func_stdio, pSrc_file, max_size, pFile_time, pComment, comment_size, level_and_flags,
		user_extra_data, user_extra_data_len, user_extra_data_central, user_extra_data_central_len);
}

mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags)
{
    MZ_FILE *pSrc_file = NULL;
    mz_uint64 uncomp_size = 0;
    MZ_TIME_T file_modified_time;
    MZ_TIME_T *pFile_time = NULL;
    mz_bool status;

    memset(&file_modified_time, 0, sizeof(file_modified_time));

#if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_STDIO)
    pFile_time = &file_modified_time;
    if (!mz_zip_get_file_modified_time(pSrc_filename, &file_modified_time))
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_STAT_FAILED);
#endif

    pSrc_file = MZ_FOPEN(pSrc_filename, "rb");
    if (!pSrc_file)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_OPEN_FAILED);

    MZ_FSEEK64(pSrc_file, 0, SEEK_END);
    uncomp_size = MZ_FTELL64(pSrc_file);
    MZ_FSEEK64(pSrc_file, 0, SEEK_SET);

    status = mz_zip_writer_add_cfile(pZip, pArchive_name, pSrc_file, uncomp_size, pFile_time, pComment, comment_size, level_and_flags, NULL, 0, NULL, 0);

    MZ_FCLOSE(pSrc_file);

    return status;
}
#endif /* #ifndef MINIZ_NO_STDIO */

static mz_bool mz_zip_writer_update_zip64_extension_block(mz_zip_array *pNew_ext, mz_zip_archive *pZip, const mz_uint8 *pExt, uint32_t ext_len, mz_uint64 *pComp_size, mz_uint64 *pUncomp_size, mz_uint64 *pLocal_header_ofs, mz_uint32 *pDisk_start)
{
    /* + 64 should be enough for any new zip64 data */
    if (!mz_zip_array_reserve(pZip, pNew_ext, ext_len + 64, MZ_FALSE))
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    mz_zip_array_resize(pZip, pNew_ext, 0, MZ_FALSE);

    if ((pUncomp_size) || (pComp_size) || (pLocal_header_ofs) || (pDisk_start))
    {
        mz_uint8 new_ext_block[64];
        mz_uint8 *pDst = new_ext_block;
        mz_write_le16(pDst, MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID);
        mz_write_le16(pDst + sizeof(mz_uint16), 0);
        pDst += sizeof(mz_uint16) * 2;

        if (pUncomp_size)
        {
            mz_write_le64(pDst, *pUncomp_size);
            pDst += sizeof(mz_uint64);
        }

        if (pComp_size)
        {
            mz_write_le64(pDst, *pComp_size);
            pDst += sizeof(mz_uint64);
        }

        if (pLocal_header_ofs)
        {
            mz_write_le64(pDst, *pLocal_header_ofs);
            pDst += sizeof(mz_uint64);
        }

        if (pDisk_start)
        {
            mz_write_le32(pDst, *pDisk_start);
            pDst += sizeof(mz_uint32);
        }

        mz_write_le16(new_ext_block + sizeof(mz_uint16), (mz_uint16)((pDst - new_ext_block) - sizeof(mz_uint16) * 2));

        if (!mz_zip_array_push_back(pZip, pNew_ext, new_ext_block, pDst - new_ext_block))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
    }

    if ((pExt) && (ext_len))
    {
        mz_uint32 extra_size_remaining = ext_len;
        const mz_uint8 *pExtra_data = pExt;

        do
        {
            mz_uint32 field_id, field_data_size, field_total_size;

            if (extra_size_remaining < (sizeof(mz_uint16) * 2))
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

            field_id = MZ_READ_LE16(pExtra_data);
            field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));
            field_total_size = field_data_size + sizeof(mz_uint16) * 2;

            if (field_total_size > extra_size_remaining)
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

            if (field_id != MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID)
            {
                if (!mz_zip_array_push_back(pZip, pNew_ext, pExtra_data, field_total_size))
                    return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
            }

            pExtra_data += field_total_size;
            extra_size_remaining -= field_total_size;
        } while (extra_size_remaining);
    }

    return MZ_TRUE;
}

/* TODO: This func is now pretty freakin complex due to zip64, split it up? */
mz_bool mz_zip_writer_add_from_zip_reader(mz_zip_archive *pZip, mz_zip_archive *pSource_zip, mz_uint src_file_index)
{
    mz_uint n, bit_flags, num_alignment_padding_bytes, src_central_dir_following_data_size;
    mz_uint64 src_archive_bytes_remaining, local_dir_header_ofs;
    mz_uint64 cur_src_file_ofs, cur_dst_file_ofs;
    mz_uint32 local_header_u32[(MZ_ZIP_LOCAL_DIR_HEADER_SIZE + sizeof(mz_uint32) - 1) / sizeof(mz_uint32)];
    mz_uint8 *pLocal_header = (mz_uint8 *)local_header_u32;
    mz_uint8 new_central_header[MZ_ZIP_CENTRAL_DIR_HEADER_SIZE];
    size_t orig_central_dir_size;
    mz_zip_internal_state *pState;
    void *pBuf;
    const mz_uint8 *pSrc_central_header;
    mz_zip_archive_file_stat src_file_stat;
    mz_uint32 src_filename_len, src_comment_len, src_ext_len;
    mz_uint32 local_header_filename_size, local_header_extra_len;
    mz_uint64 local_header_comp_size, local_header_uncomp_size;
    mz_bool found_zip64_ext_data_in_ldir = MZ_FALSE;

    /* Sanity checks */
    if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING) || (!pSource_zip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    /* Don't support copying files from zip64 archives to non-zip64, even though in some cases this is possible */
    if ((pSource_zip->m_pState->m_zip64) && (!pZip->m_pState->m_zip64))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    /* Get pointer to the source central dir header and crack it */
    if (NULL == (pSrc_central_header = mz_zip_get_cdh(pSource_zip, src_file_index)))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (MZ_READ_LE32(pSrc_central_header + MZ_ZIP_CDH_SIG_OFS) != MZ_ZIP_CENTRAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    src_filename_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    src_comment_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_COMMENT_LEN_OFS);
    src_ext_len = MZ_READ_LE16(pSrc_central_header + MZ_ZIP_CDH_EXTRA_LEN_OFS);
    src_central_dir_following_data_size = src_filename_len + src_ext_len + src_comment_len;

    /* TODO: We don't support central dir's >= MZ_UINT32_MAX bytes right now (+32 fudge factor in case we need to add more extra data) */
    if ((pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_central_dir_following_data_size + 32) >= MZ_UINT32_MAX)
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);

    num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pZip);

    if (!pState->m_zip64)
    {
        if (pZip->m_total_files == MZ_UINT16_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }
    else
    {
        /* TODO: Our zip64 support still has some 32-bit limits that may not be worth fixing. */
        if (pZip->m_total_files == MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }

    if (!mz_zip_file_stat_internal(pSource_zip, src_file_index, pSrc_central_header, &src_file_stat, NULL))
        return MZ_FALSE;

    cur_src_file_ofs = src_file_stat.m_local_header_ofs;
    cur_dst_file_ofs = pZip->m_archive_size;

    /* Read the source archive's local dir header */
    if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);

    if (MZ_READ_LE32(pLocal_header) != MZ_ZIP_LOCAL_DIR_HEADER_SIG)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);

    cur_src_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE;

    /* Compute the total size we need to copy (filename+extra data+compressed data) */
    local_header_filename_size = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_FILENAME_LEN_OFS);
    local_header_extra_len = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_EXTRA_LEN_OFS);
    local_header_comp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_COMPRESSED_SIZE_OFS);
    local_header_uncomp_size = MZ_READ_LE32(pLocal_header + MZ_ZIP_LDH_DECOMPRESSED_SIZE_OFS);
    src_archive_bytes_remaining = local_header_filename_size + local_header_extra_len + src_file_stat.m_comp_size;

    /* Try to find a zip64 extended information field */
    if ((local_header_extra_len) && ((local_header_comp_size == MZ_UINT32_MAX) || (local_header_uncomp_size == MZ_UINT32_MAX)))
    {
        mz_zip_array file_data_array;
        const mz_uint8 *pExtra_data;
        mz_uint32 extra_size_remaining = local_header_extra_len;

        mz_zip_array_init(&file_data_array, 1);
        if (!mz_zip_array_resize(pZip, &file_data_array, local_header_extra_len, MZ_FALSE))
        {
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, src_file_stat.m_local_header_ofs + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + local_header_filename_size, file_data_array.m_p, local_header_extra_len) != local_header_extra_len)
        {
            mz_zip_array_clear(pZip, &file_data_array);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
        }

        pExtra_data = (const mz_uint8 *)file_data_array.m_p;

        do
        {
            mz_uint32 field_id, field_data_size, field_total_size;

            if (extra_size_remaining < (sizeof(mz_uint16) * 2))
            {
                mz_zip_array_clear(pZip, &file_data_array);
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
            }

            field_id = MZ_READ_LE16(pExtra_data);
            field_data_size = MZ_READ_LE16(pExtra_data + sizeof(mz_uint16));
            field_total_size = field_data_size + sizeof(mz_uint16) * 2;

            if (field_total_size > extra_size_remaining)
            {
                mz_zip_array_clear(pZip, &file_data_array);
                return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
            }

            if (field_id == MZ_ZIP64_EXTENDED_INFORMATION_FIELD_HEADER_ID)
            {
                const mz_uint8 *pSrc_field_data = pExtra_data + sizeof(mz_uint32);

                if (field_data_size < sizeof(mz_uint64) * 2)
                {
                    mz_zip_array_clear(pZip, &file_data_array);
                    return mz_zip_set_error(pZip, MZ_ZIP_INVALID_HEADER_OR_CORRUPTED);
                }

                local_header_uncomp_size = MZ_READ_LE64(pSrc_field_data);
                local_header_comp_size = MZ_READ_LE64(pSrc_field_data + sizeof(mz_uint64)); /* may be 0 if there's a descriptor */

                found_zip64_ext_data_in_ldir = MZ_TRUE;
                break;
            }

            pExtra_data += field_total_size;
            extra_size_remaining -= field_total_size;
        } while (extra_size_remaining);

        mz_zip_array_clear(pZip, &file_data_array);
    }

    if (!pState->m_zip64)
    {
        /* Try to detect if the new archive will most likely wind up too big and bail early (+(sizeof(mz_uint32) * 4) is for the optional descriptor which could be present, +64 is a fudge factor). */
        /* We also check when the archive is finalized so this doesn't need to be perfect. */
        mz_uint64 approx_new_archive_size = cur_dst_file_ofs + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE + src_archive_bytes_remaining + (sizeof(mz_uint32) * 4) +
                                            pState->m_central_dir.m_size + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_central_dir_following_data_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE + 64;

        if (approx_new_archive_size >= MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);
    }

    /* Write dest archive padding */
    if (!mz_zip_writer_write_zeros(pZip, cur_dst_file_ofs, num_alignment_padding_bytes))
        return MZ_FALSE;

    cur_dst_file_ofs += num_alignment_padding_bytes;

    local_dir_header_ofs = cur_dst_file_ofs;
    if (pZip->m_file_offset_alignment)
    {
        MZ_ASSERT((local_dir_header_ofs & (pZip->m_file_offset_alignment - 1)) == 0);
    }

    /* The original zip's local header+ext block doesn't change, even with zip64, so we can just copy it over to the dest zip */
    if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pLocal_header, MZ_ZIP_LOCAL_DIR_HEADER_SIZE) != MZ_ZIP_LOCAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

    cur_dst_file_ofs += MZ_ZIP_LOCAL_DIR_HEADER_SIZE;

    /* Copy over the source archive bytes to the dest archive, also ensure we have enough buf space to handle optional data descriptor */
    if (NULL == (pBuf = pZip->m_pAlloc(pZip->m_pAlloc_opaque, 1, (size_t)MZ_MAX(32U, MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, src_archive_bytes_remaining)))))
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

    while (src_archive_bytes_remaining)
    {
        n = (mz_uint)MZ_MIN((mz_uint64)MZ_ZIP_MAX_IO_BUF_SIZE, src_archive_bytes_remaining);
        if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, n) != n)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
        }
        cur_src_file_ofs += n;

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pBuf, n) != n)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }
        cur_dst_file_ofs += n;

        src_archive_bytes_remaining -= n;
    }

    /* Now deal with the optional data descriptor */
    bit_flags = MZ_READ_LE16(pLocal_header + MZ_ZIP_LDH_BIT_FLAG_OFS);
    if (bit_flags & 8)
    {
        /* Copy data descriptor */
        if ((pSource_zip->m_pState->m_zip64) || (found_zip64_ext_data_in_ldir))
        {
            /* src is zip64, dest must be zip64 */

            /* name			uint32_t's */
            /* id				1 (optional in zip64?) */
            /* crc			1 */
            /* comp_size	2 */
            /* uncomp_size 2 */
            if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, (sizeof(mz_uint32) * 6)) != (sizeof(mz_uint32) * 6))
            {
                pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
            }

            n = sizeof(mz_uint32) * ((MZ_READ_LE32(pBuf) == MZ_ZIP_DATA_DESCRIPTOR_ID) ? 6 : 5);
        }
        else
        {
            /* src is NOT zip64 */
            mz_bool has_id;

            if (pSource_zip->m_pRead(pSource_zip->m_pIO_opaque, cur_src_file_ofs, pBuf, sizeof(mz_uint32) * 4) != sizeof(mz_uint32) * 4)
            {
                pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
                return mz_zip_set_error(pZip, MZ_ZIP_FILE_READ_FAILED);
            }

            has_id = (MZ_READ_LE32(pBuf) == MZ_ZIP_DATA_DESCRIPTOR_ID);

            if (pZip->m_pState->m_zip64)
            {
                /* dest is zip64, so upgrade the data descriptor */
                const mz_uint32 *pSrc_descriptor = (const mz_uint32 *)((const mz_uint8 *)pBuf + (has_id ? sizeof(mz_uint32) : 0));
                const mz_uint32 src_crc32 = pSrc_descriptor[0];
                const mz_uint64 src_comp_size = pSrc_descriptor[1];
                const mz_uint64 src_uncomp_size = pSrc_descriptor[2];

                mz_write_le32((mz_uint8 *)pBuf, MZ_ZIP_DATA_DESCRIPTOR_ID);
                mz_write_le32((mz_uint8 *)pBuf + sizeof(mz_uint32) * 1, src_crc32);
                mz_write_le64((mz_uint8 *)pBuf + sizeof(mz_uint32) * 2, src_comp_size);
                mz_write_le64((mz_uint8 *)pBuf + sizeof(mz_uint32) * 4, src_uncomp_size);

                n = sizeof(mz_uint32) * 6;
            }
            else
            {
                /* dest is NOT zip64, just copy it as-is */
                n = sizeof(mz_uint32) * (has_id ? 4 : 3);
            }
        }

        if (pZip->m_pWrite(pZip->m_pIO_opaque, cur_dst_file_ofs, pBuf, n) != n)
        {
            pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);
        }

        cur_src_file_ofs += n;
        cur_dst_file_ofs += n;
    }
    pZip->m_pFree(pZip->m_pAlloc_opaque, pBuf);

    /* Finally, add the new central dir header */
    orig_central_dir_size = pState->m_central_dir.m_size;

    memcpy(new_central_header, pSrc_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE);

    if (pState->m_zip64)
    {
        /* This is the painful part: We need to write a new central dir header + ext block with updated zip64 fields, and ensure the old fields (if any) are not included. */
        const mz_uint8 *pSrc_ext = pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_filename_len;
        mz_zip_array new_ext_block;

        mz_zip_array_init(&new_ext_block, sizeof(mz_uint8));

        MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_COMPRESSED_SIZE_OFS, MZ_UINT32_MAX);
        MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_DECOMPRESSED_SIZE_OFS, MZ_UINT32_MAX);
        MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_LOCAL_HEADER_OFS, MZ_UINT32_MAX);

        if (!mz_zip_writer_update_zip64_extension_block(&new_ext_block, pZip, pSrc_ext, src_ext_len, &src_file_stat.m_comp_size, &src_file_stat.m_uncomp_size, &local_dir_header_ofs, NULL))
        {
            mz_zip_array_clear(pZip, &new_ext_block);
            return MZ_FALSE;
        }

        MZ_WRITE_LE16(new_central_header + MZ_ZIP_CDH_EXTRA_LEN_OFS, new_ext_block.m_size);

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE))
        {
            mz_zip_array_clear(pZip, &new_ext_block);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, src_filename_len))
        {
            mz_zip_array_clear(pZip, &new_ext_block);
            mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_ext_block.m_p, new_ext_block.m_size))
        {
            mz_zip_array_clear(pZip, &new_ext_block);
            mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + src_filename_len + src_ext_len, src_comment_len))
        {
            mz_zip_array_clear(pZip, &new_ext_block);
            mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }

        mz_zip_array_clear(pZip, &new_ext_block);
    }
    else
    {
        /* sanity checks */
        if (cur_dst_file_ofs > MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

        if (local_dir_header_ofs >= MZ_UINT32_MAX)
            return mz_zip_set_error(pZip, MZ_ZIP_ARCHIVE_TOO_LARGE);

        MZ_WRITE_LE32(new_central_header + MZ_ZIP_CDH_LOCAL_HEADER_OFS, local_dir_header_ofs);

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, new_central_header, MZ_ZIP_CENTRAL_DIR_HEADER_SIZE))
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);

        if (!mz_zip_array_push_back(pZip, &pState->m_central_dir, pSrc_central_header + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, src_central_dir_following_data_size))
        {
            mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
            return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
        }
    }

    /* This shouldn't trigger unless we screwed up during the initial sanity checks */
    if (pState->m_central_dir.m_size >= MZ_UINT32_MAX)
    {
        /* TODO: Support central dirs >= 32-bits in size */
        mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
        return mz_zip_set_error(pZip, MZ_ZIP_UNSUPPORTED_CDIR_SIZE);
    }

    n = (mz_uint32)orig_central_dir_size;
    if (!mz_zip_array_push_back(pZip, &pState->m_central_dir_offsets, &n, 1))
    {
        mz_zip_array_resize(pZip, &pState->m_central_dir, orig_central_dir_size, MZ_FALSE);
        return mz_zip_set_error(pZip, MZ_ZIP_ALLOC_FAILED);
    }

    pZip->m_total_files++;
    pZip->m_archive_size = cur_dst_file_ofs;

    return MZ_TRUE;
}

mz_bool mz_zip_writer_finalize_archive(mz_zip_archive *pZip)
{
    mz_zip_internal_state *pState;
    mz_uint64 central_dir_ofs, central_dir_size;
    mz_uint8 hdr[256];

    if ((!pZip) || (!pZip->m_pState) || (pZip->m_zip_mode != MZ_ZIP_MODE_WRITING))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    pState = pZip->m_pState;

    if (pState->m_zip64)
    {
        if ((pZip->m_total_files > MZ_UINT32_MAX) || (pState->m_central_dir.m_size >= MZ_UINT32_MAX))
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }
    else
    {
        if ((pZip->m_total_files > MZ_UINT16_MAX) || ((pZip->m_archive_size + pState->m_central_dir.m_size + MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) > MZ_UINT32_MAX))
            return mz_zip_set_error(pZip, MZ_ZIP_TOO_MANY_FILES);
    }

    central_dir_ofs = 0;
    central_dir_size = 0;
    if (pZip->m_total_files)
    {
        /* Write central directory */
        central_dir_ofs = pZip->m_archive_size;
        central_dir_size = pState->m_central_dir.m_size;
        pZip->m_central_directory_file_ofs = central_dir_ofs;
        if (pZip->m_pWrite(pZip->m_pIO_opaque, central_dir_ofs, pState->m_central_dir.m_p, (size_t)central_dir_size) != central_dir_size)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        pZip->m_archive_size += central_dir_size;
    }

    if (pState->m_zip64)
    {
        /* Write zip64 end of central directory header */
        mz_uint64 rel_ofs_to_zip64_ecdr = pZip->m_archive_size;

        MZ_CLEAR_OBJ(hdr);
        MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDH_SIG_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIG);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_SIZE_OF_RECORD_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE - sizeof(mz_uint32) - sizeof(mz_uint64));
        MZ_WRITE_LE16(hdr + MZ_ZIP64_ECDH_VERSION_MADE_BY_OFS, 0x031E); /* TODO: always Unix */
        MZ_WRITE_LE16(hdr + MZ_ZIP64_ECDH_VERSION_NEEDED_OFS, 0x002D);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS, pZip->m_total_files);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_TOTAL_ENTRIES_OFS, pZip->m_total_files);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_SIZE_OFS, central_dir_size);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDH_CDIR_OFS_OFS, central_dir_ofs);
        if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        pZip->m_archive_size += MZ_ZIP64_END_OF_CENTRAL_DIR_HEADER_SIZE;

        /* Write zip64 end of central directory locator */
        MZ_CLEAR_OBJ(hdr);
        MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDL_SIG_OFS, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIG);
        MZ_WRITE_LE64(hdr + MZ_ZIP64_ECDL_REL_OFS_TO_ZIP64_ECDR_OFS, rel_ofs_to_zip64_ecdr);
        MZ_WRITE_LE32(hdr + MZ_ZIP64_ECDL_TOTAL_NUMBER_OF_DISKS_OFS, 1);
        if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE) != MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE)
            return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

        pZip->m_archive_size += MZ_ZIP64_END_OF_CENTRAL_DIR_LOCATOR_SIZE;
    }

    /* Write end of central directory record */
    MZ_CLEAR_OBJ(hdr);
    MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_SIG_OFS, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIG);
    MZ_WRITE_LE16(hdr + MZ_ZIP_ECDH_CDIR_NUM_ENTRIES_ON_DISK_OFS, MZ_MIN(MZ_UINT16_MAX, pZip->m_total_files));
    MZ_WRITE_LE16(hdr + MZ_ZIP_ECDH_CDIR_TOTAL_ENTRIES_OFS, MZ_MIN(MZ_UINT16_MAX, pZip->m_total_files));
    MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_CDIR_SIZE_OFS, MZ_MIN(MZ_UINT32_MAX, central_dir_size));
    MZ_WRITE_LE32(hdr + MZ_ZIP_ECDH_CDIR_OFS_OFS, MZ_MIN(MZ_UINT32_MAX, central_dir_ofs));

    if (pZip->m_pWrite(pZip->m_pIO_opaque, pZip->m_archive_size, hdr, MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE) != MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE)
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_WRITE_FAILED);

#ifndef MINIZ_NO_STDIO
    if ((pState->m_pFile) && (MZ_FFLUSH(pState->m_pFile) == EOF))
        return mz_zip_set_error(pZip, MZ_ZIP_FILE_CLOSE_FAILED);
#endif /* #ifndef MINIZ_NO_STDIO */

    pZip->m_archive_size += MZ_ZIP_END_OF_CENTRAL_DIR_HEADER_SIZE;

    pZip->m_zip_mode = MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED;
    return MZ_TRUE;
}

mz_bool mz_zip_writer_finalize_heap_archive(mz_zip_archive *pZip, void **ppBuf, size_t *pSize)
{
    if ((!ppBuf) || (!pSize))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    *ppBuf = NULL;
    *pSize = 0;

    if ((!pZip) || (!pZip->m_pState))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (pZip->m_pWrite != mz_zip_heap_write_func)
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    if (!mz_zip_writer_finalize_archive(pZip))
        return MZ_FALSE;

    *ppBuf = pZip->m_pState->m_pMem;
    *pSize = pZip->m_pState->m_mem_size;
    pZip->m_pState->m_pMem = NULL;
    pZip->m_pState->m_mem_size = pZip->m_pState->m_mem_capacity = 0;

    return MZ_TRUE;
}

mz_bool mz_zip_writer_end(mz_zip_archive *pZip)
{
    return mz_zip_writer_end_internal(pZip, MZ_TRUE);
}

#ifndef MINIZ_NO_STDIO
mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags)
{
    return mz_zip_add_mem_to_archive_file_in_place_v2(pZip_filename, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, NULL);
}

mz_bool mz_zip_add_mem_to_archive_file_in_place_v2(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, mz_zip_error *pErr)
{
    mz_bool status, created_new_archive = MZ_FALSE;
    mz_zip_archive zip_archive;
    struct MZ_FILE_STAT_STRUCT file_stat;
    mz_zip_error actual_err = MZ_ZIP_NO_ERROR;

    mz_zip_zero_struct(&zip_archive);
    if ((int)level_and_flags < 0)
        level_and_flags = MZ_DEFAULT_LEVEL;

    if ((!pZip_filename) || (!pArchive_name) || ((buf_size) && (!pBuf)) || ((comment_size) && (!pComment)) || ((level_and_flags & 0xF) > MZ_UBER_COMPRESSION))
    {
        if (pErr)
            *pErr = MZ_ZIP_INVALID_PARAMETER;
        return MZ_FALSE;
    }

    if (!mz_zip_writer_validate_archive_name(pArchive_name))
    {
        if (pErr)
            *pErr = MZ_ZIP_INVALID_FILENAME;
        return MZ_FALSE;
    }

    /* Important: The regular non-64 bit version of stat() can fail here if the file is very large, which could cause the archive to be overwritten. */
    /* So be sure to compile with _LARGEFILE64_SOURCE 1 */
    if (MZ_FILE_STAT(pZip_filename, &file_stat) != 0)
    {
        /* Create a new archive. */
        if (!mz_zip_writer_init_file_v2(&zip_archive, pZip_filename, 0, level_and_flags))
        {
            if (pErr)
                *pErr = zip_archive.m_last_error;
            return MZ_FALSE;
        }

        created_new_archive = MZ_TRUE;
    }
    else
    {
        /* Append to an existing archive. */
        if (!mz_zip_reader_init_file_v2(&zip_archive, pZip_filename, level_and_flags | MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY, 0, 0))
        {
            if (pErr)
                *pErr = zip_archive.m_last_error;
            return MZ_FALSE;
        }

        if (!mz_zip_writer_init_from_reader_v2(&zip_archive, pZip_filename, level_and_flags))
        {
            if (pErr)
                *pErr = zip_archive.m_last_error;

            mz_zip_reader_end_internal(&zip_archive, MZ_FALSE);

            return MZ_FALSE;
        }
    }

    status = mz_zip_writer_add_mem_ex(&zip_archive, pArchive_name, pBuf, buf_size, pComment, comment_size, level_and_flags, 0, 0);
    actual_err = zip_archive.m_last_error;

    /* Always finalize, even if adding failed for some reason, so we have a valid central directory. (This may not always succeed, but we can try.) */
    if (!mz_zip_writer_finalize_archive(&zip_archive))
    {
        if (!actual_err)
            actual_err = zip_archive.m_last_error;

        status = MZ_FALSE;
    }

    if (!mz_zip_writer_end_internal(&zip_archive, status))
    {
        if (!actual_err)
            actual_err = zip_archive.m_last_error;

        status = MZ_FALSE;
    }

    if ((!status) && (created_new_archive))
    {
        /* It's a new archive and something went wrong, so just delete it. */
        int ignoredStatus = MZ_DELETE_FILE(pZip_filename);
        (void)ignoredStatus;
    }

    if (pErr)
        *pErr = actual_err;

    return status;
}

void *mz_zip_extract_archive_file_to_heap_v2(const char *pZip_filename, const char *pArchive_name, const char *pComment, size_t *pSize, mz_uint flags, mz_zip_error *pErr)
{
    mz_uint32 file_index;
    mz_zip_archive zip_archive;
    void *p = NULL;

    if (pSize)
        *pSize = 0;

    if ((!pZip_filename) || (!pArchive_name))
    {
        if (pErr)
            *pErr = MZ_ZIP_INVALID_PARAMETER;

        return NULL;
    }

    mz_zip_zero_struct(&zip_archive);
    if (!mz_zip_reader_init_file_v2(&zip_archive, pZip_filename, flags | MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY, 0, 0))
    {
        if (pErr)
            *pErr = zip_archive.m_last_error;

        return NULL;
    }

    if (mz_zip_reader_locate_file_v2(&zip_archive, pArchive_name, pComment, flags, &file_index))
    {
        p = mz_zip_reader_extract_to_heap(&zip_archive, file_index, pSize, flags);
    }

    mz_zip_reader_end_internal(&zip_archive, p != NULL);

    if (pErr)
        *pErr = zip_archive.m_last_error;

    return p;
}

void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, size_t *pSize, mz_uint flags)
{
    return mz_zip_extract_archive_file_to_heap_v2(pZip_filename, pArchive_name, NULL, pSize, flags, NULL);
}

#endif /* #ifndef MINIZ_NO_STDIO */

#endif /* #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS */

/* ------------------- Misc utils */

mz_zip_mode mz_zip_get_mode(mz_zip_archive *pZip)
{
    return pZip ? pZip->m_zip_mode : MZ_ZIP_MODE_INVALID;
}

mz_zip_type mz_zip_get_type(mz_zip_archive *pZip)
{
    return pZip ? pZip->m_zip_type : MZ_ZIP_TYPE_INVALID;
}

mz_zip_error mz_zip_set_last_error(mz_zip_archive *pZip, mz_zip_error err_num)
{
    mz_zip_error prev_err;

    if (!pZip)
        return MZ_ZIP_INVALID_PARAMETER;

    prev_err = pZip->m_last_error;

    pZip->m_last_error = err_num;
    return prev_err;
}

mz_zip_error mz_zip_peek_last_error(mz_zip_archive *pZip)
{
    if (!pZip)
        return MZ_ZIP_INVALID_PARAMETER;

    return pZip->m_last_error;
}

mz_zip_error mz_zip_clear_last_error(mz_zip_archive *pZip)
{
    return mz_zip_set_last_error(pZip, MZ_ZIP_NO_ERROR);
}

mz_zip_error mz_zip_get_last_error(mz_zip_archive *pZip)
{
    mz_zip_error prev_err;

    if (!pZip)
        return MZ_ZIP_INVALID_PARAMETER;

    prev_err = pZip->m_last_error;

    pZip->m_last_error = MZ_ZIP_NO_ERROR;
    return prev_err;
}

const char *mz_zip_get_error_string(mz_zip_error mz_err)
{
    switch (mz_err)
    {
        case MZ_ZIP_NO_ERROR:
            return "no error";
        case MZ_ZIP_UNDEFINED_ERROR:
            return "undefined error";
        case MZ_ZIP_TOO_MANY_FILES:
            return "too many files";
        case MZ_ZIP_FILE_TOO_LARGE:
            return "file too large";
        case MZ_ZIP_UNSUPPORTED_METHOD:
            return "unsupported method";
        case MZ_ZIP_UNSUPPORTED_ENCRYPTION:
            return "unsupported encryption";
        case MZ_ZIP_UNSUPPORTED_FEATURE:
            return "unsupported feature";
        case MZ_ZIP_FAILED_FINDING_CENTRAL_DIR:
            return "failed finding central directory";
        case MZ_ZIP_NOT_AN_ARCHIVE:
            return "not a ZIP archive";
        case MZ_ZIP_INVALID_HEADER_OR_CORRUPTED:
            return "invalid header or archive is corrupted";
        case MZ_ZIP_UNSUPPORTED_MULTIDISK:
            return "unsupported multidisk archive";
        case MZ_ZIP_DECOMPRESSION_FAILED:
            return "decompression failed or archive is corrupted";
        case MZ_ZIP_COMPRESSION_FAILED:
            return "compression failed";
        case MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE:
            return "unexpected decompressed size";
        case MZ_ZIP_CRC_CHECK_FAILED:
            return "CRC-32 check failed";
        case MZ_ZIP_UNSUPPORTED_CDIR_SIZE:
            return "unsupported central directory size";
        case MZ_ZIP_ALLOC_FAILED:
            return "allocation failed";
        case MZ_ZIP_FILE_OPEN_FAILED:
            return "file open failed";
        case MZ_ZIP_FILE_CREATE_FAILED:
            return "file create failed";
        case MZ_ZIP_FILE_WRITE_FAILED:
            return "file write failed";
        case MZ_ZIP_FILE_READ_FAILED:
            return "file read failed";
        case MZ_ZIP_FILE_CLOSE_FAILED:
            return "file close failed";
        case MZ_ZIP_FILE_SEEK_FAILED:
            return "file seek failed";
        case MZ_ZIP_FILE_STAT_FAILED:
            return "file stat failed";
        case MZ_ZIP_INVALID_PARAMETER:
            return "invalid parameter";
        case MZ_ZIP_INVALID_FILENAME:
            return "invalid filename";
        case MZ_ZIP_BUF_TOO_SMALL:
            return "buffer too small";
        case MZ_ZIP_INTERNAL_ERROR:
            return "internal error";
        case MZ_ZIP_FILE_NOT_FOUND:
            return "file not found";
        case MZ_ZIP_ARCHIVE_TOO_LARGE:
            return "archive is too large";
        case MZ_ZIP_VALIDATION_FAILED:
            return "validation failed";
        case MZ_ZIP_WRITE_CALLBACK_FAILED:
            return "write calledback failed";
        default:
            break;
    }

    return "unknown error";
}

/* Note: Just because the archive is not zip64 doesn't necessarily mean it doesn't have Zip64 extended information extra field, argh. */
mz_bool mz_zip_is_zip64(mz_zip_archive *pZip)
{
    if ((!pZip) || (!pZip->m_pState))
        return MZ_FALSE;

    return pZip->m_pState->m_zip64;
}

size_t mz_zip_get_central_dir_size(mz_zip_archive *pZip)
{
    if ((!pZip) || (!pZip->m_pState))
        return 0;

    return pZip->m_pState->m_central_dir.m_size;
}

mz_uint mz_zip_reader_get_num_files(mz_zip_archive *pZip)
{
    return pZip ? pZip->m_total_files : 0;
}

mz_uint64 mz_zip_get_archive_size(mz_zip_archive *pZip)
{
    if (!pZip)
        return 0;
    return pZip->m_archive_size;
}

mz_uint64 mz_zip_get_archive_file_start_offset(mz_zip_archive *pZip)
{
    if ((!pZip) || (!pZip->m_pState))
        return 0;
    return pZip->m_pState->m_file_archive_start_ofs;
}

MZ_FILE *mz_zip_get_cfile(mz_zip_archive *pZip)
{
    if ((!pZip) || (!pZip->m_pState))
        return 0;
    return pZip->m_pState->m_pFile;
}

size_t mz_zip_read_archive_data(mz_zip_archive *pZip, mz_uint64 file_ofs, void *pBuf, size_t n)
{
    if ((!pZip) || (!pZip->m_pState) || (!pBuf) || (!pZip->m_pRead))
        return mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);

    return pZip->m_pRead(pZip->m_pIO_opaque, file_ofs, pBuf, n);
}

mz_uint mz_zip_reader_get_filename(mz_zip_archive *pZip, mz_uint file_index, char *pFilename, mz_uint filename_buf_size)
{
    mz_uint n;
    const mz_uint8 *p = mz_zip_get_cdh(pZip, file_index);
    if (!p)
    {
        if (filename_buf_size)
            pFilename[0] = '\0';
        mz_zip_set_error(pZip, MZ_ZIP_INVALID_PARAMETER);
        return 0;
    }
    n = MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS);
    if (filename_buf_size)
    {
        n = MZ_MIN(n, filename_buf_size - 1);
        memcpy(pFilename, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE, n);
        pFilename[n] = '\0';
    }
    return n + 1;
}

mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index, mz_zip_archive_file_stat *pStat)
{
    return mz_zip_file_stat_internal(pZip, file_index, mz_zip_get_cdh(pZip, file_index), pStat, NULL);
}

mz_bool mz_zip_end(mz_zip_archive *pZip)
{
    if (!pZip)
        return MZ_FALSE;

    if (pZip->m_zip_mode == MZ_ZIP_MODE_READING)
        return mz_zip_reader_end(pZip);
#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
    else if ((pZip->m_zip_mode == MZ_ZIP_MODE_WRITING) || (pZip->m_zip_mode == MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED))
        return mz_zip_writer_end(pZip);
#endif

    return MZ_FALSE;
}

#ifdef __cplusplus
}
#endif

#endif /*#ifndef MINIZ_NO_ARCHIVE_APIS*/
