1 /* iowin32.c -- IO base function header for compress/uncompress .zip 2 files using zlib + zip or unzip API 3 This IO API version uses the Win32 API (for Microsoft Windows) 4 5 Version 1.01e, February 12th, 2005 6 7 Copyright (C) 1998-2005 Gilles Vollant 8 */ 9 10 #include <stdlib.h> 11 12 #include "zlib.h" 13 #include "ioapi.h" 14 #include "iowin32.h" 15 16 #ifndef INVALID_HANDLE_VALUE 17 #define INVALID_HANDLE_VALUE (0xFFFFFFFF) 18 #endif 19 20 #ifndef INVALID_SET_FILE_POINTER 21 #define INVALID_SET_FILE_POINTER ((DWORD)-1) 22 #endif 23 24 voidpf ZCALLBACK win32_open_file_func OF(( 25 voidpf opaque, 26 const char* filename, 27 int mode)); 28 29 uLong ZCALLBACK win32_read_file_func OF(( 30 voidpf opaque, 31 voidpf stream, 32 void* buf, 33 uLong size)); 34 35 uLong ZCALLBACK win32_write_file_func OF(( 36 voidpf opaque, 37 voidpf stream, 38 const void* buf, 39 uLong size)); 40 41 long ZCALLBACK win32_tell_file_func OF(( 42 voidpf opaque, 43 voidpf stream)); 44 45 long ZCALLBACK win32_seek_file_func OF(( 46 voidpf opaque, 47 voidpf stream, 48 uLong offset, 49 int origin)); 50 51 int ZCALLBACK win32_close_file_func OF(( 52 voidpf opaque, 53 voidpf stream)); 54 55 int ZCALLBACK win32_error_file_func OF(( 56 voidpf opaque, 57 voidpf stream)); 58 59 typedef struct 60 { 61 HANDLE hf; 62 int error; 63 } WIN32FILE_IOWIN; 64 65 voidpf ZCALLBACK win32_open_file_func (opaque, filename, mode) 66 voidpf opaque; 67 const char* filename; 68 int mode; 69 { 70 const char* mode_fopen = NULL; 71 DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ; 72 HANDLE hFile = 0; 73 voidpf ret=NULL; 74 75 dwDesiredAccess = dwShareMode = dwFlagsAndAttributes = 0; 76 77 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ) 78 { 79 dwDesiredAccess = GENERIC_READ; 80 dwCreationDisposition = OPEN_EXISTING; 81 dwShareMode = FILE_SHARE_READ; 82 } 83 else 84 if (mode & ZLIB_FILEFUNC_MODE_EXISTING) 85 { 86 dwDesiredAccess = GENERIC_WRITE | GENERIC_READ; 87 dwCreationDisposition = OPEN_EXISTING; 88 } 89 else 90 if (mode & ZLIB_FILEFUNC_MODE_CREATE) 91 { 92 dwDesiredAccess = GENERIC_WRITE | GENERIC_READ; 93 dwCreationDisposition = CREATE_ALWAYS; 94 } 95 96 if ((filename!=NULL) && (dwDesiredAccess != 0)) 97 hFile = CreateFile((LPCTSTR)filename, dwDesiredAccess, dwShareMode, NULL, 98 dwCreationDisposition, dwFlagsAndAttributes, NULL); 99 100 if (hFile == INVALID_HANDLE_VALUE) 101 hFile = NULL; 102 103 if (hFile != NULL) 104 { 105 WIN32FILE_IOWIN w32fiow; 106 w32fiow.hf = hFile; 107 w32fiow.error = 0; 108 ret = malloc(sizeof(WIN32FILE_IOWIN)); 109 if (ret==NULL) 110 CloseHandle(hFile); 111 else *((WIN32FILE_IOWIN*)ret) = w32fiow; 112 } 113 return ret; 114 } 115 116 117 uLong ZCALLBACK win32_read_file_func (opaque, stream, buf, size) 118 voidpf opaque; 119 voidpf stream; 120 void* buf; 121 uLong size; 122 { 123 uLong ret=0; 124 HANDLE hFile = NULL; 125 if (stream!=NULL) 126 hFile = ((WIN32FILE_IOWIN*)stream) -> hf; 127 if (hFile != NULL) 128 if (!ReadFile(hFile, buf, size, &ret, NULL)) 129 { 130 DWORD dwErr = GetLastError(); 131 if (dwErr == ERROR_HANDLE_EOF) 132 dwErr = 0; 133 ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr; 134 } 135 136 return ret; 137 } 138 139 140 uLong ZCALLBACK win32_write_file_func (opaque, stream, buf, size) 141 voidpf opaque; 142 voidpf stream; 143 const void* buf; 144 uLong size; 145 { 146 uLong ret=0; 147 HANDLE hFile = NULL; 148 if (stream!=NULL) 149 hFile = ((WIN32FILE_IOWIN*)stream) -> hf; 150 151 if (hFile !=NULL) 152 if (!WriteFile(hFile, buf, size, &ret, NULL)) 153 { 154 DWORD dwErr = GetLastError(); 155 if (dwErr == ERROR_HANDLE_EOF) 156 dwErr = 0; 157 ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr; 158 } 159 160 return ret; 161 } 162 163 long ZCALLBACK win32_tell_file_func (opaque, stream) 164 voidpf opaque; 165 voidpf stream; 166 { 167 long ret=-1; 168 HANDLE hFile = NULL; 169 if (stream!=NULL) 170 hFile = ((WIN32FILE_IOWIN*)stream) -> hf; 171 if (hFile != NULL) 172 { 173 DWORD dwSet = SetFilePointer(hFile, 0, NULL, FILE_CURRENT); 174 if (dwSet == INVALID_SET_FILE_POINTER) 175 { 176 DWORD dwErr = GetLastError(); 177 ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr; 178 ret = -1; 179 } 180 else 181 ret=(long)dwSet; 182 } 183 return ret; 184 } 185 186 long ZCALLBACK win32_seek_file_func (opaque, stream, offset, origin) 187 voidpf opaque; 188 voidpf stream; 189 uLong offset; 190 int origin; 191 { 192 DWORD dwMoveMethod=0xFFFFFFFF; 193 HANDLE hFile = NULL; 194 195 long ret=-1; 196 if (stream!=NULL) 197 hFile = ((WIN32FILE_IOWIN*)stream) -> hf; 198 switch (origin) 199 { 200 case ZLIB_FILEFUNC_SEEK_CUR : 201 dwMoveMethod = FILE_CURRENT; 202 break; 203 case ZLIB_FILEFUNC_SEEK_END : 204 dwMoveMethod = FILE_END; 205 break; 206 case ZLIB_FILEFUNC_SEEK_SET : 207 dwMoveMethod = FILE_BEGIN; 208 break; 209 default: return -1; 210 } 211 212 if (hFile != NULL) 213 { 214 DWORD dwSet = SetFilePointer(hFile, offset, NULL, dwMoveMethod); 215 if (dwSet == INVALID_SET_FILE_POINTER) 216 { 217 DWORD dwErr = GetLastError(); 218 ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr; 219 ret = -1; 220 } 221 else 222 ret=0; 223 } 224 return ret; 225 } 226 227 int ZCALLBACK win32_close_file_func (opaque, stream) 228 voidpf opaque; 229 voidpf stream; 230 { 231 int ret=-1; 232 233 if (stream!=NULL) 234 { 235 HANDLE hFile; 236 hFile = ((WIN32FILE_IOWIN*)stream) -> hf; 237 if (hFile != NULL) 238 { 239 CloseHandle(hFile); 240 ret=0; 241 } 242 free(stream); 243 } 244 return ret; 245 } 246 247 int ZCALLBACK win32_error_file_func (opaque, stream) 248 voidpf opaque; 249 voidpf stream; 250 { 251 int ret=-1; 252 if (stream!=NULL) 253 { 254 ret = ((WIN32FILE_IOWIN*)stream) -> error; 255 } 256 return ret; 257 } 258 259 void fill_win32_filefunc (pzlib_filefunc_def) 260 zlib_filefunc_def* pzlib_filefunc_def; 261 { 262 pzlib_filefunc_def->zopen_file = win32_open_file_func; 263 pzlib_filefunc_def->zread_file = win32_read_file_func; 264 pzlib_filefunc_def->zwrite_file = win32_write_file_func; 265 pzlib_filefunc_def->ztell_file = win32_tell_file_func; 266 pzlib_filefunc_def->zseek_file = win32_seek_file_func; 267 pzlib_filefunc_def->zclose_file = win32_close_file_func; 268 pzlib_filefunc_def->zerror_file = win32_error_file_func; 269 pzlib_filefunc_def->opaque=NULL; 270 } 271
