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libretro-dolphin/Externals/minizip/ioapi.c
Pierre Bourdon 8e26d33133 Externals: Add a stripped down version of minizip.
2018-10-09 14:27:53 +02:00

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/* ioapi.c -- IO base function header for compress/uncompress .zip
part of the MiniZip project
Copyright (C) 1998-2010 Gilles Vollant
http://www.winimage.com/zLibDll/minizip.html
Modifications for Zip64 support
Copyright (C) 2009-2010 Mathias Svensson
http://result42.com
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include <stdlib.h>
#include <string.h>
#if defined unix || defined __APPLE__
#include <sys/types.h>
#include <unistd.h>
#endif
#include "ioapi.h"
#if defined(_WIN32)
# define snprintf _snprintf
#endif
voidpf call_zopen64(const zlib_filefunc64_32_def *pfilefunc, const void *filename, int mode)
{
if (pfilefunc->zfile_func64.zopen64_file != NULL)
return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque, filename, mode);
return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque, (const char*)filename, mode);
}
voidpf call_zopendisk64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream, uint32_t number_disk, int mode)
{
if (pfilefunc->zfile_func64.zopendisk64_file != NULL)
return (*(pfilefunc->zfile_func64.zopendisk64_file)) (pfilefunc->zfile_func64.opaque, filestream, number_disk, mode);
return (*(pfilefunc->zopendisk32_file))(pfilefunc->zfile_func64.opaque, filestream, number_disk, mode);
}
long call_zseek64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream, uint64_t offset, int origin)
{
uint32_t offset_truncated = 0;
if (pfilefunc->zfile_func64.zseek64_file != NULL)
return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
offset_truncated = (uint32_t)offset;
if (offset_truncated != offset)
return -1;
return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream, offset_truncated, origin);
}
uint64_t call_ztell64(const zlib_filefunc64_32_def *pfilefunc, voidpf filestream)
{
uint64_t position;
if (pfilefunc->zfile_func64.zseek64_file != NULL)
return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque, filestream);
position = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque, filestream);
if ((position) == UINT32_MAX)
return (uint64_t)-1;
return position;
}
void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def *p_filefunc64_32, const zlib_filefunc_def *p_filefunc32)
{
p_filefunc64_32->zfile_func64.zopen64_file = NULL;
p_filefunc64_32->zfile_func64.zopendisk64_file = NULL;
p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
p_filefunc64_32->zopendisk32_file = p_filefunc32->zopendisk_file;
p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
p_filefunc64_32->zfile_func64.ztell64_file = NULL;
p_filefunc64_32->zfile_func64.zseek64_file = NULL;
p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
}
static voidpf ZCALLBACK fopen_file_func(voidpf opaque, const char *filename, int mode);
static uint32_t ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uint32_t size);
static uint32_t ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void *buf, uint32_t size);
static uint64_t ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream);
static long ZCALLBACK fseek64_file_func(voidpf opaque, voidpf stream, uint64_t offset, int origin);
static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream);
static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream);
typedef struct
{
FILE *file;
int filenameLength;
void *filename;
} FILE_IOPOSIX;
static voidpf file_build_ioposix(FILE *file, const char *filename)
{
FILE_IOPOSIX *ioposix = NULL;
if (file == NULL)
return NULL;
ioposix = (FILE_IOPOSIX*)malloc(sizeof(FILE_IOPOSIX));
ioposix->file = file;
ioposix->filenameLength = (int)strlen(filename) + 1;
ioposix->filename = (char*)malloc(ioposix->filenameLength * sizeof(char));
strncpy((char*)ioposix->filename, filename, ioposix->filenameLength);
return (voidpf)ioposix;
}
static voidpf ZCALLBACK fopen_file_func(voidpf opaque, const char *filename, int mode)
{
FILE* file = NULL;
const char *mode_fopen = NULL;
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
mode_fopen = "rb";
else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
mode_fopen = "r+b";
else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
mode_fopen = "wb";
if ((filename != NULL) && (mode_fopen != NULL))
{
file = fopen(filename, mode_fopen);
return file_build_ioposix(file, filename);
}
return file;
}
static voidpf ZCALLBACK fopen64_file_func(voidpf opaque, const void *filename, int mode)
{
FILE* file = NULL;
const char *mode_fopen = NULL;
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
mode_fopen = "rb";
else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
mode_fopen = "r+b";
else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
mode_fopen = "wb";
if ((filename != NULL) && (mode_fopen != NULL))
{
file = fopen64((const char*)filename, mode_fopen);
return file_build_ioposix(file, (const char*)filename);
}
return file;
}
static voidpf ZCALLBACK fopendisk64_file_func(voidpf opaque, voidpf stream, uint32_t number_disk, int mode)
{
FILE_IOPOSIX *ioposix = NULL;
char *diskFilename = NULL;
voidpf ret = NULL;
int i = 0;
if (stream == NULL)
return NULL;
ioposix = (FILE_IOPOSIX*)stream;
diskFilename = (char*)malloc(ioposix->filenameLength * sizeof(char));
strncpy(diskFilename, (const char*)ioposix->filename, ioposix->filenameLength);
for (i = ioposix->filenameLength - 1; i >= 0; i -= 1)
{
if (diskFilename[i] != '.')
continue;
snprintf(&diskFilename[i], ioposix->filenameLength - i, ".z%02u", number_disk + 1);
break;
}
if (i >= 0)
ret = fopen64_file_func(opaque, diskFilename, mode);
free(diskFilename);
return ret;
}
static voidpf ZCALLBACK fopendisk_file_func(voidpf opaque, voidpf stream, uint32_t number_disk, int mode)
{
FILE_IOPOSIX *ioposix = NULL;
char *diskFilename = NULL;
voidpf ret = NULL;
int i = 0;
if (stream == NULL)
return NULL;
ioposix = (FILE_IOPOSIX*)stream;
diskFilename = (char*)malloc(ioposix->filenameLength * sizeof(char));
strncpy(diskFilename, (const char*)ioposix->filename, ioposix->filenameLength);
for (i = ioposix->filenameLength - 1; i >= 0; i -= 1)
{
if (diskFilename[i] != '.')
continue;
snprintf(&diskFilename[i], ioposix->filenameLength - i, ".z%02u", number_disk + 1);
break;
}
if (i >= 0)
ret = fopen_file_func(opaque, diskFilename, mode);
free(diskFilename);
return ret;
}
static uint32_t ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uint32_t size)
{
FILE_IOPOSIX *ioposix = NULL;
uint32_t read = (uint32_t)-1;
if (stream == NULL)
return read;
ioposix = (FILE_IOPOSIX*)stream;
read = (uint32_t)fread(buf, 1, (size_t)size, ioposix->file);
return read;
}
static uint32_t ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void *buf, uint32_t size)
{
FILE_IOPOSIX *ioposix = NULL;
uint32_t written = (uint32_t)-1;
if (stream == NULL)
return written;
ioposix = (FILE_IOPOSIX*)stream;
written = (uint32_t)fwrite(buf, 1, (size_t)size, ioposix->file);
return written;
}
static long ZCALLBACK ftell_file_func(voidpf opaque, voidpf stream)
{
FILE_IOPOSIX *ioposix = NULL;
long ret = -1;
if (stream == NULL)
return ret;
ioposix = (FILE_IOPOSIX*)stream;
ret = ftell(ioposix->file);
return ret;
}
static uint64_t ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream)
{
FILE_IOPOSIX *ioposix = NULL;
uint64_t ret = (uint64_t)-1;
if (stream == NULL)
return ret;
ioposix = (FILE_IOPOSIX*)stream;
ret = ftello64(ioposix->file);
return ret;
}
static long ZCALLBACK fseek_file_func(voidpf opaque, voidpf stream, uint32_t offset, int origin)
{
FILE_IOPOSIX *ioposix = NULL;
int fseek_origin = 0;
long ret = 0;
if (stream == NULL)
return -1;
ioposix = (FILE_IOPOSIX*)stream;
switch (origin)
{
case ZLIB_FILEFUNC_SEEK_CUR:
fseek_origin = SEEK_CUR;
break;
case ZLIB_FILEFUNC_SEEK_END:
fseek_origin = SEEK_END;
break;
case ZLIB_FILEFUNC_SEEK_SET:
fseek_origin = SEEK_SET;
break;
default:
return -1;
}
if (fseek(ioposix->file, offset, fseek_origin) != 0)
ret = -1;
return ret;
}
static long ZCALLBACK fseek64_file_func(voidpf opaque, voidpf stream, uint64_t offset, int origin)
{
FILE_IOPOSIX *ioposix = NULL;
int fseek_origin = 0;
long ret = 0;
if (stream == NULL)
return -1;
ioposix = (FILE_IOPOSIX*)stream;
switch (origin)
{
case ZLIB_FILEFUNC_SEEK_CUR:
fseek_origin = SEEK_CUR;
break;
case ZLIB_FILEFUNC_SEEK_END:
fseek_origin = SEEK_END;
break;
case ZLIB_FILEFUNC_SEEK_SET:
fseek_origin = SEEK_SET;
break;
default:
return -1;
}
if (fseeko64(ioposix->file, offset, fseek_origin) != 0)
ret = -1;
return ret;
}
static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream)
{
FILE_IOPOSIX *ioposix = NULL;
int ret = -1;
if (stream == NULL)
return ret;
ioposix = (FILE_IOPOSIX*)stream;
if (ioposix->filename != NULL)
free(ioposix->filename);
ret = fclose(ioposix->file);
free(ioposix);
return ret;
}
static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream)
{
FILE_IOPOSIX *ioposix = NULL;
int ret = -1;
if (stream == NULL)
return ret;
ioposix = (FILE_IOPOSIX*)stream;
ret = ferror(ioposix->file);
return ret;
}
void fill_fopen_filefunc(zlib_filefunc_def *pzlib_filefunc_def)
{
pzlib_filefunc_def->zopen_file = fopen_file_func;
pzlib_filefunc_def->zopendisk_file = fopendisk_file_func;
pzlib_filefunc_def->zread_file = fread_file_func;
pzlib_filefunc_def->zwrite_file = fwrite_file_func;
pzlib_filefunc_def->ztell_file = ftell_file_func;
pzlib_filefunc_def->zseek_file = fseek_file_func;
pzlib_filefunc_def->zclose_file = fclose_file_func;
pzlib_filefunc_def->zerror_file = ferror_file_func;
pzlib_filefunc_def->opaque = NULL;
}
void fill_fopen64_filefunc(zlib_filefunc64_def *pzlib_filefunc_def)
{
pzlib_filefunc_def->zopen64_file = fopen64_file_func;
pzlib_filefunc_def->zopendisk64_file = fopendisk64_file_func;
pzlib_filefunc_def->zread_file = fread_file_func;
pzlib_filefunc_def->zwrite_file = fwrite_file_func;
pzlib_filefunc_def->ztell64_file = ftell64_file_func;
pzlib_filefunc_def->zseek64_file = fseek64_file_func;
pzlib_filefunc_def->zclose_file = fclose_file_func;
pzlib_filefunc_def->zerror_file = ferror_file_func;
pzlib_filefunc_def->opaque = NULL;
}
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