381 lines
12 KiB
C
381 lines
12 KiB
C
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/* ioapi.h -- IO base function header for compress/uncompress .zip
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part of the MiniZip project
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Copyright (C) 1998-2010 Gilles Vollant
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http://www.winimage.com/zLibDll/minizip.html
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Modifications for Zip64 support
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Copyright (C) 2009-2010 Mathias Svensson
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http://result42.com
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This program is distributed under the terms of the same license as zlib.
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See the accompanying LICENSE file for the full text of the license.
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*/
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//taken and adapted from https://stackoverflow.com/a/13492589
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// save diagnostic state
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#pragma GCC diagnostic push
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// turn off the specific warning. Can also use "-Wall"
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#include <stdlib.h>
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#include <string.h>
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#include "ioapi.h"
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#if defined(_WIN32)
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# define snprintf _snprintf
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#endif
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#ifdef __APPLE__
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/* In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions */
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# define FOPEN_FUNC(filename, mode) fopen(filename, mode)
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# define FTELLO_FUNC(stream) ftello(stream)
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# define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
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#else
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# define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
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# define FTELLO_FUNC(stream) ftello64(stream)
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# define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
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#endif
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/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
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#ifndef SEEK_CUR
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# define SEEK_CUR 1
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#endif
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#ifndef SEEK_END
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# define SEEK_END 2
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#endif
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#ifndef SEEK_SET
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# define SEEK_SET 0
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#endif
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voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
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{
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if (pfilefunc->zfile_func64.zopen64_file != NULL)
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return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
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return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
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}
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voidpf call_zopendisk64 OF((const zlib_filefunc64_32_def* pfilefunc, voidpf filestream, int number_disk, int mode))
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{
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if (pfilefunc->zfile_func64.zopendisk64_file != NULL)
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return (*(pfilefunc->zfile_func64.zopendisk64_file)) (pfilefunc->zfile_func64.opaque,filestream,number_disk,mode);
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return (*(pfilefunc->zopendisk32_file))(pfilefunc->zfile_func64.opaque,filestream,number_disk,mode);
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}
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long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
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{
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uLong offsetTruncated;
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
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offsetTruncated = (uLong)offset;
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if (offsetTruncated != offset)
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return -1;
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return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
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}
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ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
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{
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uLong tell_uLong;
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
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tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
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if ((tell_uLong) == 0xffffffff)
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return (ZPOS64_T)-1;
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return tell_uLong;
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}
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void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
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{
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p_filefunc64_32->zfile_func64.zopen64_file = NULL;
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p_filefunc64_32->zfile_func64.zopendisk64_file = NULL;
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p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
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p_filefunc64_32->zopendisk32_file = p_filefunc32->zopendisk_file;
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p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
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p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
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p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
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p_filefunc64_32->zfile_func64.ztell64_file = NULL;
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p_filefunc64_32->zfile_func64.zseek64_file = NULL;
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p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
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p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
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p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
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p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
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p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
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}
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static voidpf ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
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static uLong ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
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static uLong ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
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static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
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static long ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
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static int ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
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static int ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
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typedef struct
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{
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FILE *file;
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int filenameLength;
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void *filename;
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} FILE_IOPOSIX;
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static voidpf file_build_ioposix(FILE *file, const char *filename)
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{
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FILE_IOPOSIX *ioposix = NULL;
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if (file == NULL)
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return NULL;
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ioposix = (FILE_IOPOSIX*)malloc(sizeof(FILE_IOPOSIX));
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ioposix->file = file;
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ioposix->filenameLength = strlen(filename) + 1;
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ioposix->filename = (char*)malloc(ioposix->filenameLength * sizeof(char));
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strncpy(ioposix->filename, filename, ioposix->filenameLength);
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return (voidpf)ioposix;
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}
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static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
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{
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FILE* file = NULL;
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const char* mode_fopen = NULL;
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
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mode_fopen = "rb";
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else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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mode_fopen = "r+b";
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else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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mode_fopen = "wb";
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if ((filename != NULL) && (mode_fopen != NULL))
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{
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file = fopen(filename, mode_fopen);
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return file_build_ioposix(file, filename);
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}
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return file;
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}
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static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
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{
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FILE* file = NULL;
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const char* mode_fopen = NULL;
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
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mode_fopen = "rb";
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else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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mode_fopen = "r+b";
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else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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mode_fopen = "wb";
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if ((filename != NULL) && (mode_fopen != NULL))
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{
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file = FOPEN_FUNC((const char*)filename, mode_fopen);
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return file_build_ioposix(file, (const char*)filename);
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}
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return file;
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}
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static voidpf ZCALLBACK fopendisk64_file_func (voidpf opaque, voidpf stream, int number_disk, int mode)
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{
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FILE_IOPOSIX *ioposix = NULL;
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char *diskFilename = NULL;
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voidpf ret = NULL;
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int i = 0;
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if (stream == NULL)
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return NULL;
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ioposix = (FILE_IOPOSIX*)stream;
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diskFilename = (char*)malloc(ioposix->filenameLength * sizeof(char));
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strncpy(diskFilename, ioposix->filename, ioposix->filenameLength);
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for (i = ioposix->filenameLength - 1; i >= 0; i -= 1)
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{
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if (diskFilename[i] != '.')
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continue;
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snprintf(&diskFilename[i], ioposix->filenameLength - i, ".z%02d", number_disk + 1);
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break;
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}
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if (i >= 0)
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ret = fopen64_file_func(opaque, diskFilename, mode);
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free(diskFilename);
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return ret;
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}
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static voidpf ZCALLBACK fopendisk_file_func (voidpf opaque, voidpf stream, int number_disk, int mode)
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{
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FILE_IOPOSIX *ioposix = NULL;
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char *diskFilename = NULL;
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voidpf ret = NULL;
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int i = 0;
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if (stream == NULL)
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return NULL;
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ioposix = (FILE_IOPOSIX*)stream;
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diskFilename = (char*)malloc(ioposix->filenameLength * sizeof(char));
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strncpy(diskFilename, ioposix->filename, ioposix->filenameLength);
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for (i = ioposix->filenameLength - 1; i >= 0; i -= 1)
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{
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if (diskFilename[i] != '.')
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continue;
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snprintf(&diskFilename[i], ioposix->filenameLength - i, ".z%02d", number_disk + 1);
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break;
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}
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if (i >= 0)
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ret = fopen_file_func(opaque, diskFilename, mode);
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free(diskFilename);
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return ret;
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}
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static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
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{
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FILE_IOPOSIX *ioposix = NULL;
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uLong ret;
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if (stream == NULL)
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return -1;
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ioposix = (FILE_IOPOSIX*)stream;
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ret = (uLong)fread(buf, 1, (size_t)size, ioposix->file);
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return ret;
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}
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static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
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{
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FILE_IOPOSIX *ioposix = NULL;
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uLong ret;
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if (stream == NULL)
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return -1;
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ioposix = (FILE_IOPOSIX*)stream;
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ret = (uLong)fwrite(buf, 1, (size_t)size, ioposix->file);
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return ret;
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}
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static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
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{
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FILE_IOPOSIX *ioposix = NULL;
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long ret = -1;
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if (stream == NULL)
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return ret;
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ioposix = (FILE_IOPOSIX*)stream;
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ret = ftell(ioposix->file);
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return ret;
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}
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static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
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{
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FILE_IOPOSIX *ioposix = NULL;
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ZPOS64_T ret = -1;
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if (stream == NULL)
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return ret;
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ioposix = (FILE_IOPOSIX*)stream;
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ret = FTELLO_FUNC(ioposix->file);
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return ret;
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}
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static long ZCALLBACK fseek_file_func (voidpf opaque, voidpf stream, uLong offset, int origin)
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{
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FILE_IOPOSIX *ioposix = NULL;
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int fseek_origin = 0;
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long ret = 0;
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if (stream == NULL)
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return -1;
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ioposix = (FILE_IOPOSIX*)stream;
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switch (origin)
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{
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case ZLIB_FILEFUNC_SEEK_CUR:
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fseek_origin = SEEK_CUR;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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fseek_origin = SEEK_END;
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break;
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case ZLIB_FILEFUNC_SEEK_SET:
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fseek_origin = SEEK_SET;
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break;
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default:
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return -1;
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}
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if (fseek(ioposix->file, offset, fseek_origin) != 0)
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ret = -1;
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return ret;
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}
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static long ZCALLBACK fseek64_file_func (voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
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{
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FILE_IOPOSIX *ioposix = NULL;
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int fseek_origin = 0;
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long ret = 0;
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if (stream == NULL)
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return -1;
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ioposix = (FILE_IOPOSIX*)stream;
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switch (origin)
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{
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case ZLIB_FILEFUNC_SEEK_CUR:
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fseek_origin = SEEK_CUR;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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fseek_origin = SEEK_END;
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break;
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case ZLIB_FILEFUNC_SEEK_SET:
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fseek_origin = SEEK_SET;
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break;
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default:
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return -1;
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}
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if(FSEEKO_FUNC(ioposix->file, offset, fseek_origin) != 0)
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ret = -1;
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return ret;
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}
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static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
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{
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FILE_IOPOSIX *ioposix = NULL;
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int ret = -1;
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if (stream == NULL)
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return ret;
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ioposix = (FILE_IOPOSIX*)stream;
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if (ioposix->filename != NULL)
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free(ioposix->filename);
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ret = fclose(ioposix->file);
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free(ioposix);
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return ret;
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}
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|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
// turn the warnings back on
|
||
|
|
#pragma GCC diagnostic pop
|