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| 1 /* ioapi.c -- IO base function header for compress/uncompress .zip |
| 2 files using zlib + zip or unzip API |
| 3 |
| 4 Version 1.01e, February 12th, 2005 |
| 5 |
| 6 Copyright (C) 1998-2005 Gilles Vollant |
| 7 */ |
| 8 |
| 9 #include <stdio.h> |
| 10 #include <stdlib.h> |
| 11 #include <string.h> |
| 12 |
| 13 #include "zlib.h" |
| 14 #include "ioapi.h" |
| 15 |
| 16 |
| 17 |
| 18 /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */ |
| 19 |
| 20 #ifndef SEEK_CUR |
| 21 #define SEEK_CUR 1 |
| 22 #endif |
| 23 |
| 24 #ifndef SEEK_END |
| 25 #define SEEK_END 2 |
| 26 #endif |
| 27 |
| 28 #ifndef SEEK_SET |
| 29 #define SEEK_SET 0 |
| 30 #endif |
| 31 |
| 32 voidpf ZCALLBACK fopen_file_func OF(( |
| 33 voidpf opaque, |
| 34 const char* filename, |
| 35 int mode)); |
| 36 |
| 37 uLong ZCALLBACK fread_file_func OF(( |
| 38 voidpf opaque, |
| 39 voidpf stream, |
| 40 void* buf, |
| 41 uLong size)); |
| 42 |
| 43 uLong ZCALLBACK fwrite_file_func OF(( |
| 44 voidpf opaque, |
| 45 voidpf stream, |
| 46 const void* buf, |
| 47 uLong size)); |
| 48 |
| 49 long ZCALLBACK ftell_file_func OF(( |
| 50 voidpf opaque, |
| 51 voidpf stream)); |
| 52 |
| 53 long ZCALLBACK fseek_file_func OF(( |
| 54 voidpf opaque, |
| 55 voidpf stream, |
| 56 uLong offset, |
| 57 int origin)); |
| 58 |
| 59 int ZCALLBACK fclose_file_func OF(( |
| 60 voidpf opaque, |
| 61 voidpf stream)); |
| 62 |
| 63 int ZCALLBACK ferror_file_func OF(( |
| 64 voidpf opaque, |
| 65 voidpf stream)); |
| 66 |
| 67 |
| 68 voidpf ZCALLBACK fopen_file_func (opaque, filename, mode) |
| 69 voidpf opaque; |
| 70 const char* filename; |
| 71 int mode; |
| 72 { |
| 73 FILE* file = NULL; |
| 74 const char* mode_fopen = NULL; |
| 75 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ) |
| 76 mode_fopen = "rb"; |
| 77 else |
| 78 if (mode & ZLIB_FILEFUNC_MODE_EXISTING) |
| 79 mode_fopen = "r+b"; |
| 80 else |
| 81 if (mode & ZLIB_FILEFUNC_MODE_CREATE) |
| 82 mode_fopen = "wb"; |
| 83 |
| 84 if ((filename!=NULL) && (mode_fopen != NULL)) |
| 85 file = fopen(filename, mode_fopen); |
| 86 return file; |
| 87 } |
| 88 |
| 89 |
| 90 uLong ZCALLBACK fread_file_func (opaque, stream, buf, size) |
| 91 voidpf opaque; |
| 92 voidpf stream; |
| 93 void* buf; |
| 94 uLong size; |
| 95 { |
| 96 uLong ret; |
| 97 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream); |
| 98 return ret; |
| 99 } |
| 100 |
| 101 |
| 102 uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size) |
| 103 voidpf opaque; |
| 104 voidpf stream; |
| 105 const void* buf; |
| 106 uLong size; |
| 107 { |
| 108 uLong ret; |
| 109 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream); |
| 110 return ret; |
| 111 } |
| 112 |
| 113 long ZCALLBACK ftell_file_func (opaque, stream) |
| 114 voidpf opaque; |
| 115 voidpf stream; |
| 116 { |
| 117 long ret; |
| 118 ret = ftell((FILE *)stream); |
| 119 return ret; |
| 120 } |
| 121 |
| 122 long ZCALLBACK fseek_file_func (opaque, stream, offset, origin) |
| 123 voidpf opaque; |
| 124 voidpf stream; |
| 125 uLong offset; |
| 126 int origin; |
| 127 { |
| 128 int fseek_origin=0; |
| 129 long ret; |
| 130 switch (origin) |
| 131 { |
| 132 case ZLIB_FILEFUNC_SEEK_CUR : |
| 133 fseek_origin = SEEK_CUR; |
| 134 break; |
| 135 case ZLIB_FILEFUNC_SEEK_END : |
| 136 fseek_origin = SEEK_END; |
| 137 break; |
| 138 case ZLIB_FILEFUNC_SEEK_SET : |
| 139 fseek_origin = SEEK_SET; |
| 140 break; |
| 141 default: return -1; |
| 142 } |
| 143 ret = 0; |
| 144 fseek((FILE *)stream, offset, fseek_origin); |
| 145 return ret; |
| 146 } |
| 147 |
| 148 int ZCALLBACK fclose_file_func (opaque, stream) |
| 149 voidpf opaque; |
| 150 voidpf stream; |
| 151 { |
| 152 int ret; |
| 153 ret = fclose((FILE *)stream); |
| 154 return ret; |
| 155 } |
| 156 |
| 157 int ZCALLBACK ferror_file_func (opaque, stream) |
| 158 voidpf opaque; |
| 159 voidpf stream; |
| 160 { |
| 161 int ret; |
| 162 ret = ferror((FILE *)stream); |
| 163 return ret; |
| 164 } |
| 165 |
| 166 void fill_fopen_filefunc (pzlib_filefunc_def) |
| 167 zlib_filefunc_def* pzlib_filefunc_def; |
| 168 { |
| 169 pzlib_filefunc_def->zopen_file = fopen_file_func; |
| 170 pzlib_filefunc_def->zread_file = fread_file_func; |
| 171 pzlib_filefunc_def->zwrite_file = fwrite_file_func; |
| 172 pzlib_filefunc_def->ztell_file = ftell_file_func; |
| 173 pzlib_filefunc_def->zseek_file = fseek_file_func; |
| 174 pzlib_filefunc_def->zclose_file = fclose_file_func; |
| 175 pzlib_filefunc_def->zerror_file = ferror_file_func; |
| 176 pzlib_filefunc_def->opaque = NULL; |
| 177 } |
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