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If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26*************************************************************************/ 27 28/* ioapi.c -- IO base function header for compress/uncompress .zip 29 files using zlib + zip or unzip API 30 31 Version 1.01e, February 12th, 2005 32 33 Copyright (C) 1998-2005 Gilles Vollant 34*/ 35 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39 40#include <zlib.h> 41#include "ioapi.h" 42 43 44 45/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */ 46 47#ifndef SEEK_CUR 48#define SEEK_CUR 1 49#endif 50 51#ifndef SEEK_END 52#define SEEK_END 2 53#endif 54 55#ifndef SEEK_SET 56#define SEEK_SET 0 57#endif 58 59voidpf ZCALLBACK fopen_file_func OF(( 60 voidpf opaque, 61 const char* filename, 62 int mode)); 63 64uLong ZCALLBACK fread_file_func OF(( 65 voidpf opaque, 66 voidpf stream, 67 void* buf, 68 uLong size)); 69 70uLong ZCALLBACK fwrite_file_func OF(( 71 voidpf opaque, 72 voidpf stream, 73 const void* buf, 74 uLong size)); 75 76long ZCALLBACK ftell_file_func OF(( 77 voidpf opaque, 78 voidpf stream)); 79 80long ZCALLBACK fseek_file_func OF(( 81 voidpf opaque, 82 voidpf stream, 83 uLong offset, 84 int origin)); 85 86int ZCALLBACK fclose_file_func OF(( 87 voidpf opaque, 88 voidpf stream)); 89 90int ZCALLBACK ferror_file_func OF(( 91 voidpf opaque, 92 voidpf stream)); 93 94 95voidpf ZCALLBACK fopen_file_func (opaque, filename, mode) 96 voidpf opaque; 97 const char* filename; 98 int mode; 99{ 100 FILE* file = NULL; 101 const char* mode_fopen = NULL; 102 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ) 103 mode_fopen = "rb"; 104 else 105 if (mode & ZLIB_FILEFUNC_MODE_EXISTING) 106 mode_fopen = "r+b"; 107 else 108 if (mode & ZLIB_FILEFUNC_MODE_CREATE) 109 mode_fopen = "wb"; 110 111 if ((filename!=NULL) && (mode_fopen != NULL)) 112 file = fopen(filename, mode_fopen); 113 return file; 114} 115 116 117uLong ZCALLBACK fread_file_func (opaque, stream, buf, size) 118 voidpf opaque; 119 voidpf stream; 120 void* buf; 121 uLong size; 122{ 123 uLong ret; 124 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream); 125 return ret; 126} 127 128 129uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size) 130 voidpf opaque; 131 voidpf stream; 132 const void* buf; 133 uLong size; 134{ 135 uLong ret; 136 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream); 137 return ret; 138} 139 140long ZCALLBACK ftell_file_func (opaque, stream) 141 voidpf opaque; 142 voidpf stream; 143{ 144 long ret; 145 ret = ftell((FILE *)stream); 146 return ret; 147} 148 149long ZCALLBACK fseek_file_func (opaque, stream, offset, origin) 150 voidpf opaque; 151 voidpf stream; 152 uLong offset; 153 int origin; 154{ 155 int fseek_origin=0; 156 long ret; 157 switch (origin) 158 { 159 case ZLIB_FILEFUNC_SEEK_CUR : 160 fseek_origin = SEEK_CUR; 161 break; 162 case ZLIB_FILEFUNC_SEEK_END : 163 fseek_origin = SEEK_END; 164 break; 165 case ZLIB_FILEFUNC_SEEK_SET : 166 fseek_origin = SEEK_SET; 167 break; 168 default: return -1; 169 } 170 ret = 0; 171 fseek((FILE *)stream, offset, fseek_origin); 172 return ret; 173} 174 175int ZCALLBACK fclose_file_func (opaque, stream) 176 voidpf opaque; 177 voidpf stream; 178{ 179 int ret; 180 ret = fclose((FILE *)stream); 181 return ret; 182} 183 184int ZCALLBACK ferror_file_func (opaque, stream) 185 voidpf opaque; 186 voidpf stream; 187{ 188 int ret; 189 ret = ferror((FILE *)stream); 190 return ret; 191} 192 193void fill_fopen_filefunc (pzlib_filefunc_def) 194 zlib_filefunc_def* pzlib_filefunc_def; 195{ 196 pzlib_filefunc_def->zopen_file = fopen_file_func; 197 pzlib_filefunc_def->zread_file = fread_file_func; 198 pzlib_filefunc_def->zwrite_file = fwrite_file_func; 199 pzlib_filefunc_def->ztell_file = ftell_file_func; 200 pzlib_filefunc_def->zseek_file = fseek_file_func; 201 pzlib_filefunc_def->zclose_file = fclose_file_func; 202 pzlib_filefunc_def->zerror_file = ferror_file_func; 203 pzlib_filefunc_def->opaque = NULL; 204} 205