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miniz_zip.c
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/**************************************************************************
*
* 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__) || defined(__MINGW32__)
#define WIN32_LEAN_AND_MEAN
#ifndef __cplusplus
#define MICROSOFT_WINDOWS_WINBASE_H_DEFINE_INTERLOCKED_CPLUSPLUS_OVERLOADS 0
#endif
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
static WCHAR* mz_utf8z_to_widechar(const char* str)
{
int reqChars = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
WCHAR* wStr = (WCHAR*)malloc(reqChars * sizeof(WCHAR));
MultiByteToWideChar(CP_UTF8, 0, str, -1, wStr, reqChars);
return wStr;
}
static FILE *mz_fopen(const char *pFilename, const char *pMode)
{
WCHAR* wFilename = mz_utf8z_to_widechar(pFilename);
WCHAR* wMode = mz_utf8z_to_widechar(pMode);
FILE* pFile = NULL;
errno_t err = _wfopen_s(&pFile, wFilename, wMode);
free(wFilename);
free(wMode);
return err ? NULL : pFile;
}
static FILE *mz_freopen(const char *pPath, const char *pMode, FILE *pStream)
{
WCHAR* wPath = mz_utf8z_to_widechar(pPath);
WCHAR* wMode = mz_utf8z_to_widechar(pMode);
FILE* pFile = NULL;
errno_t err = _wfreopen_s(&pFile, wPath, wMode, pStream);
free(wPath);
free(wMode);
return err ? NULL : pFile;
}
#if defined(__MINGW32__)
static int mz_stat(const char *path, struct _stat *buffer)
{
WCHAR* wPath = mz_utf8z_to_widechar(path);
int res = _wstat(wPath, buffer);
free(wPath);
return res;
}
#else
static int mz_stat64(const char *path, struct __stat64 *buffer)
{
WCHAR* wPath = mz_utf8z_to_widechar(path);
int res = _wstat64(wPath, buffer);
free(wPath);
return res;
}
#endif
#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
#if defined(__MINGW32__)
#define MZ_FILE_STAT_STRUCT _stat
#define MZ_FILE_STAT mz_stat
#else
#define MZ_FILE_STAT_STRUCT _stat64
#define MZ_FILE_STAT mz_stat64
#endif
#define MZ_FFLUSH fflush
#define MZ_FREOPEN mz_freopen
#define MZ_DELETE_FILE remove
#elif defined(__WATCOMC__)
#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 _ftelli64
#define MZ_FSEEK64 _fseeki64
#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__) || defined(__FreeBSD__) || (defined(__linux__) && defined(__x86_64__))
#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. */
mz_uint32 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_uint64)(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 < (mz_uint64)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_PTR(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;