| 1 | /**********************************************************************
|
|---|
| 2 | *
|
|---|
| 3 | * FileSystem.cpp
|
|---|
| 4 | * Copyright (C) 2003 UNESCO
|
|---|
| 5 | *
|
|---|
| 6 | * A component of the Greenstone digital library software
|
|---|
| 7 | * from the New Zealand Digital Library Project at the
|
|---|
| 8 | * University of Waikato, New Zealand.
|
|---|
| 9 | *
|
|---|
| 10 | * This program is free software; you can redistribute it and/or modify
|
|---|
| 11 | * it under the terms of the GNU General Public License as published by
|
|---|
| 12 | * the Free Software Foundation; either version 2 of the License, or
|
|---|
| 13 | * (at your option) any later version.
|
|---|
| 14 | *
|
|---|
| 15 | * This program is distributed in the hope that it will be useful,
|
|---|
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 18 | * GNU General Public License for more details.
|
|---|
| 19 | *
|
|---|
| 20 | * You should have received a copy of the GNU General Public License
|
|---|
| 21 | * along with this program; if not, write to the Free Software
|
|---|
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 23 | *
|
|---|
| 24 | *********************************************************************/
|
|---|
| 25 |
|
|---|
| 26 | ////////////////////////////////////////////////////////////////////////////////////
|
|---|
| 27 | //
|
|---|
| 28 | // FileSystem -- The generic file pointer routines are a collection of member
|
|---|
| 29 | // functions used to wrap the underlying file system.
|
|---|
| 30 |
|
|---|
| 31 |
|
|---|
| 32 | #include "errno.h"
|
|---|
| 33 | #include "stdafx.h"
|
|---|
| 34 | #include "FileSystem.h"
|
|---|
| 35 |
|
|---|
| 36 |
|
|---|
| 37 | using namespace FileSystem;
|
|---|
| 38 | //---------------------------------------------------------------------
|
|---|
| 39 | // FileSystem::FPTR *Create(const _TCHAR *fname)
|
|---|
| 40 | //
|
|---|
| 41 | // Create a new file and truncate existing files.
|
|---|
| 42 | // Returns a null value if the file cannot be
|
|---|
| 43 | // created.
|
|---|
| 44 | //---------------------------------------------------------------------
|
|---|
| 45 | DLL_CODE_API FileSystem::FPTR *FileSystem::Create(const char *fname)
|
|---|
| 46 | {
|
|---|
| 47 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 48 | return FS64Create(fname);
|
|---|
| 49 |
|
|---|
| 50 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 51 | FPTR *stream = new FPTR;
|
|---|
| 52 | if (!stream)
|
|---|
| 53 | return 0;
|
|---|
| 54 | stream->fptr = CreateFile(fname,
|
|---|
| 55 | GENERIC_READ | GENERIC_WRITE,
|
|---|
| 56 | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|---|
| 57 | NULL, // No security
|
|---|
| 58 | CREATE_ALWAYS,
|
|---|
| 59 | FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
|
|---|
| 60 | NULL // No attr. template
|
|---|
| 61 | );
|
|---|
| 62 |
|
|---|
| 63 | if (stream->fptr == INVALID_HANDLE_VALUE)
|
|---|
| 64 | {
|
|---|
| 65 | delete stream;
|
|---|
| 66 | return 0;
|
|---|
| 67 | }
|
|---|
| 68 | return stream;
|
|---|
| 69 |
|
|---|
| 70 | #else // Use the 32-bit stdio version by default
|
|---|
| 71 | FPTR *stream = new FPTR;
|
|---|
| 72 | if (!stream)
|
|---|
| 73 | return 0;
|
|---|
| 74 | stream->fptr = fopen(fname, "w+b");
|
|---|
| 75 | if (stream->fptr == 0)
|
|---|
| 76 | {
|
|---|
| 77 | delete stream; // 01/30/2002: Prevent memory leak
|
|---|
| 78 | return 0;
|
|---|
| 79 | }
|
|---|
| 80 | return stream;
|
|---|
| 81 | #endif
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 84 | //---------------------------------------------------------------------
|
|---|
| 85 | // FileSystem::FPTR *Open(const _TCHAR *fname, FileSystemAccessMode mode)
|
|---|
| 86 | //
|
|---|
| 87 | // Open an existing file. The "mode" variable determines if the file
|
|---|
| 88 | // is opened for read only or read/write access. Returns a null value
|
|---|
| 89 | // if the specified file cannot be opened. NOTE: This version of the
|
|---|
| 90 | // open functions will only accept: FILE_READONLY and FILE_READWRITE
|
|---|
| 91 | // access modes.
|
|---|
| 92 | //---------------------------------------------------------------------
|
|---|
| 93 | DLL_CODE_API FileSystem::FPTR *FileSystem::Open(const char *fname, FileSystem::AccessMode mode)
|
|---|
| 94 | {
|
|---|
| 95 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 96 | return FSOpen(fname, mode);
|
|---|
| 97 |
|
|---|
| 98 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 99 | FPTR *stream = new FPTR;
|
|---|
| 100 | if (!stream)
|
|---|
| 101 | return 0;
|
|---|
| 102 | if (mode == FILE_READONLY)
|
|---|
| 103 | {
|
|---|
| 104 | // Open for read only access
|
|---|
| 105 | stream->fptr = CreateFile(fname,
|
|---|
| 106 | GENERIC_READ,
|
|---|
| 107 | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|---|
| 108 | NULL, // No security
|
|---|
| 109 | OPEN_EXISTING,
|
|---|
| 110 | FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
|
|---|
| 111 | NULL // No attr. template
|
|---|
| 112 | );
|
|---|
| 113 | if (stream->fptr == INVALID_HANDLE_VALUE)
|
|---|
| 114 | {
|
|---|
| 115 | delete stream;
|
|---|
| 116 | return 0;
|
|---|
| 117 | }
|
|---|
| 118 | }
|
|---|
| 119 | else
|
|---|
| 120 | { // Open for read/write access
|
|---|
| 121 | stream->fptr = CreateFile(fname,
|
|---|
| 122 | GENERIC_READ | GENERIC_WRITE,
|
|---|
| 123 | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|---|
| 124 | NULL, // No security
|
|---|
| 125 | OPEN_EXISTING,
|
|---|
| 126 | FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,
|
|---|
| 127 | NULL // No attr. template
|
|---|
| 128 | );
|
|---|
| 129 |
|
|---|
| 130 | if (stream->fptr == INVALID_HANDLE_VALUE)
|
|---|
| 131 | {
|
|---|
| 132 | delete stream;
|
|---|
| 133 | return 0;
|
|---|
| 134 | }
|
|---|
| 135 | }
|
|---|
| 136 | return stream;
|
|---|
| 137 |
|
|---|
| 138 | #else // Use the 32-bit stdio version by default
|
|---|
| 139 | FPTR *stream = new FPTR;
|
|---|
| 140 | if (!stream)
|
|---|
| 141 | return 0;
|
|---|
| 142 |
|
|---|
| 143 | if (mode == FILE_READONLY)
|
|---|
| 144 | {
|
|---|
| 145 | // Open for read only access
|
|---|
| 146 | stream->fptr = fopen(fname, "rb");
|
|---|
| 147 | if (stream->fptr == 0)
|
|---|
| 148 | {
|
|---|
| 149 | delete stream; // 01/30/2002: Prevent memory leak
|
|---|
| 150 | return 0;
|
|---|
| 151 | }
|
|---|
| 152 | }
|
|---|
| 153 | else
|
|---|
| 154 | { // Open for read/write access
|
|---|
| 155 | stream->fptr = fopen(fname, "r+b");
|
|---|
| 156 | if (stream->fptr == 0)
|
|---|
| 157 | {
|
|---|
| 158 | delete stream; // 01/30/2002: Prevent memory leak
|
|---|
| 159 | return 0;
|
|---|
| 160 | }
|
|---|
| 161 | }
|
|---|
| 162 | return stream;
|
|---|
| 163 | #endif
|
|---|
| 164 | }
|
|---|
| 165 |
|
|---|
| 166 | //---------------------------------------------------------------------
|
|---|
| 167 | // int Close(FileSystem::FPTR *stream)
|
|---|
| 168 | //
|
|---|
| 169 | // Close an open file. Returns a non-zero value to indicate an error
|
|---|
| 170 | // condition or zero if successful.
|
|---|
| 171 | //---------------------------------------------------------------------
|
|---|
| 172 | DLL_CODE_API int FileSystem::Close(FPTR *stream)
|
|---|
| 173 | {
|
|---|
| 174 | if (!stream)
|
|---|
| 175 | return 0; // The file stream is not open
|
|---|
| 176 |
|
|---|
| 177 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 178 | return FS64Close(stream);
|
|---|
| 179 |
|
|---|
| 180 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 181 | if (!CloseHandle(stream->fptr))
|
|---|
| 182 | return 1;
|
|---|
| 183 | delete stream;
|
|---|
| 184 | stream = 0;
|
|---|
| 185 | return 0;
|
|---|
| 186 |
|
|---|
| 187 | #else // Use the 32-bit stdio version by default
|
|---|
| 188 | if (fclose(stream->fptr) != 0)
|
|---|
| 189 | return 1;
|
|---|
| 190 | delete stream;
|
|---|
| 191 | stream = 0; // 02/02/2002: Set pointer to zero after releasing it
|
|---|
| 192 | return 0;
|
|---|
| 193 | #endif
|
|---|
| 194 | }
|
|---|
| 195 |
|
|---|
| 196 | //-----------------------------------------------------------------------------
|
|---|
| 197 | // int Flush(FileSystem::FPTR *stream)
|
|---|
| 198 | //
|
|---|
| 199 | // Flush the any open disk buffers. Returns a non-zero value to indicate
|
|---|
| 200 | // an error // condition or zero if successful.
|
|---|
| 201 | //
|
|---|
| 202 | // ATTENTION: ****MS VC++*** YOU SHOULD LINK YOUR APPLICATION WITH COMMODE.OBJ
|
|---|
| 203 | // file. COMMODE.OBJ changes the global commit flag such that
|
|---|
| 204 | // calling fflush() or _flushall() commits the file buffer to disk.
|
|---|
| 205 | // The Windows NT operating system provides the WIN32 API FlushFileBuffers().
|
|---|
| 206 | // The _commit() function included with the Visual C++ 32-bit Edition
|
|---|
| 207 | // CRT calls FlushFileBuffers to write buffered data to disk.
|
|---|
| 208 | //-----------------------------------------------------------------------------
|
|---|
| 209 | DLL_CODE_API int FileSystem::Flush(FPTR *stream)
|
|---|
| 210 | {
|
|---|
| 211 | if (!stream)
|
|---|
| 212 | return 0; // The file stream is not open
|
|---|
| 213 |
|
|---|
| 214 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 215 | return FS64Flush(stream);
|
|---|
| 216 |
|
|---|
| 217 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 218 | if (!FlushFileBuffers(stream->fptr))
|
|---|
| 219 | return 1;
|
|---|
| 220 | return 0;
|
|---|
| 221 |
|
|---|
| 222 | #else // Use the 32-bit stdio version by default
|
|---|
| 223 | int ret = fflush(stream->fptr);
|
|---|
| 224 | if (ret != 0)
|
|---|
| 225 | {
|
|---|
| 226 | TRACE("\nerrno=%d\n\n\n", errno);
|
|---|
| 227 | return 1; // Error
|
|---|
| 228 | }
|
|---|
| 229 | else
|
|---|
| 230 | return 0;
|
|---|
| 231 | #endif
|
|---|
| 232 | }
|
|---|
| 233 |
|
|---|
| 234 | //---------------------------------------------------------------------
|
|---|
| 235 | // int Read(FileSystem::FPTR *stream, void *buf, isis::uint32_t bytes)
|
|---|
| 236 | //
|
|---|
| 237 | // Read a specified number of bytes from the current file position
|
|---|
| 238 | // into a memory buffer. Returns the total number if bytes read from the
|
|---|
| 239 | // file.
|
|---|
| 240 | //---------------------------------------------------------------------
|
|---|
| 241 | DLL_CODE_API isis::ulong32_t FileSystem::Read(FPTR *stream, void *buf,
|
|---|
| 242 | isis::ulong32_t bytes)
|
|---|
| 243 | {
|
|---|
| 244 | if (!stream)
|
|---|
| 245 | return (isis::ulong32_t)0; // The file stream is not open
|
|---|
| 246 |
|
|---|
| 247 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 248 | return FS64Read(stream, buf, bytes);
|
|---|
| 249 |
|
|---|
| 250 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 251 | DWORD bytes_read;
|
|---|
| 252 | if (!ReadFile(stream->fptr, (LPVOID)buf, (DWORD)bytes, &bytes_read, NULL))
|
|---|
| 253 | {
|
|---|
| 254 | return (isis::ulong32_t)0;
|
|---|
| 255 | }
|
|---|
| 256 | return (isis::ulong32_t)bytes_read;
|
|---|
| 257 |
|
|---|
| 258 | #else // Use the 32-bit stdio version by default
|
|---|
| 259 | return (isis::ulong32_t)fread((unsigned char *)buf, 1, bytes, stream->fptr);
|
|---|
| 260 | #endif
|
|---|
| 261 | }
|
|---|
| 262 | //---------------------------------------------------------------------
|
|---|
| 263 | // int Write(FileSystem::FPTR *stream, const void *buf, isis::uint32_t bytes)
|
|---|
| 264 | //
|
|---|
| 265 | // Write a specific number of bytes from a memory buffer to the
|
|---|
| 266 | // current file position. Returns the total number if bytes written
|
|---|
| 267 | // to the file.
|
|---|
| 268 | //---------------------------------------------------------------------
|
|---|
| 269 | DLL_CODE_API isis::ulong32_t FileSystem::Write(FPTR *stream, const void *buf,
|
|---|
| 270 | isis::ulong32_t bytes)
|
|---|
| 271 | {
|
|---|
| 272 | if (!stream)
|
|---|
| 273 | return (isis::ulong32_t)0; // The file stream is not open
|
|---|
| 274 |
|
|---|
| 275 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 276 | return FS64Write(stream, buf, bytes);
|
|---|
| 277 |
|
|---|
| 278 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 279 | DWORD bytes_moved;
|
|---|
| 280 | if (!WriteFile(stream->fptr, (LPVOID)buf, (DWORD)bytes, &bytes_moved, NULL))
|
|---|
| 281 | {
|
|---|
| 282 | return (isis::ulong32_t)0;
|
|---|
| 283 | }
|
|---|
| 284 | return (isis::ulong32_t)bytes_moved;
|
|---|
| 285 |
|
|---|
| 286 | #else // Use the 32-bit stdio version by default
|
|---|
| 287 | return (isis::ulong32_t)fwrite((const unsigned char *)buf, 1, bytes, stream->fptr);
|
|---|
| 288 | #endif
|
|---|
| 289 | }
|
|---|
| 290 | //---------------------------------------------------------------------------
|
|---|
| 291 | // isis::int32_t Seek(FileSystem::FPTR *stream, isis::int32_t offset, FileSystemSeekMode mode)
|
|---|
| 292 | //
|
|---|
| 293 | // Seek to the specified offset starting at the beginning (SEEK_SET),
|
|---|
| 294 | // end (SEEK_END) or current offset (SEEK_CUR). Returns a negative 1
|
|---|
| 295 | // to indicate an error condition or the current stream position if
|
|---|
| 296 | // successful.
|
|---|
| 297 | //----------------------------------------------------------------------------
|
|---|
| 298 | DLL_CODE_API FAU_t FileSystem::Seek(FPTR *stream, FAU_t offset, FileSystem::SeekMode mode)
|
|---|
| 299 | {
|
|---|
| 300 | if (!stream)
|
|---|
| 301 | return (FAU_t) - 1; // The file stream is not open
|
|---|
| 302 |
|
|---|
| 303 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 304 | return FS64Seek(stream, offset, mode);
|
|---|
| 305 |
|
|---|
| 306 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 307 | if (mode == FILE_SEEK_BEG)
|
|---|
| 308 | {
|
|---|
| 309 | return (FAU_t)SetFilePointer(stream->fptr, offset, NULL, FILE_BEGIN);
|
|---|
| 310 | }
|
|---|
| 311 | else if (mode == FILE_SEEK_CUR)
|
|---|
| 312 | {
|
|---|
| 313 | return (FAU_t)SetFilePointer(stream->fptr, offset, NULL, FILE_CURRENT);
|
|---|
| 314 | }
|
|---|
| 315 | else if (mode == FILE_SEEK_END)
|
|---|
| 316 | {
|
|---|
| 317 | return (FAU_t)SetFilePointer(stream->fptr, offset, NULL, FILE_END);
|
|---|
| 318 | }
|
|---|
| 319 | else
|
|---|
| 320 | { // An invalid seek mode was specified
|
|---|
| 321 | return (FAU_t) - 1;
|
|---|
| 322 | }
|
|---|
| 323 |
|
|---|
| 324 | #else // Use the 32-bit stdio version by default
|
|---|
| 325 | if (mode == FILE_SEEK_BEG)
|
|---|
| 326 | {
|
|---|
| 327 | return fseek(stream->fptr, offset, SEEK_SET);
|
|---|
| 328 | }
|
|---|
| 329 | else if (mode == FILE_SEEK_CUR)
|
|---|
| 330 | {
|
|---|
| 331 | return fseek(stream->fptr, offset, SEEK_CUR);
|
|---|
| 332 | }
|
|---|
| 333 | else if (mode == FILE_SEEK_END)
|
|---|
| 334 | {
|
|---|
| 335 | return fseek(stream->fptr, offset, SEEK_CUR);
|
|---|
| 336 | }
|
|---|
| 337 | else
|
|---|
| 338 | { // An invalid seek mode was specified
|
|---|
| 339 | return (FAU_t) - 1;
|
|---|
| 340 | }
|
|---|
| 341 | #endif
|
|---|
| 342 | }
|
|---|
| 343 | //----------------------------------------------------------------------------
|
|---|
| 344 | // isis::int32_t Tell(FileSystem::FPTR *stream)
|
|---|
| 345 | //
|
|---|
| 346 | //----------------------------------------------------------------------------
|
|---|
| 347 | DLL_CODE_API FAU_t FileSystem::Tell(FPTR *stream)
|
|---|
| 348 | {
|
|---|
| 349 | if (!stream)
|
|---|
| 350 | return (FAU_t) - 1; // The file stream is not open
|
|---|
| 351 |
|
|---|
| 352 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 353 | return FS64Tell(stream);
|
|---|
| 354 |
|
|---|
| 355 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 356 | return (__LWORD__)SetFilePointer(stream->fptr, 0, NULL, FILE_CURRENT);
|
|---|
| 357 |
|
|---|
| 358 | #else // Use the 32-bit stdio version by default
|
|---|
| 359 | return ftell(stream->fptr);
|
|---|
| 360 | #endif
|
|---|
| 361 | }
|
|---|
| 362 |
|
|---|
| 363 | //----------------------------------------------------------------------------
|
|---|
| 364 | // int Exists(const char *fname)
|
|---|
| 365 | //
|
|---|
| 366 | // Returns true if the specified file exists.
|
|---|
| 367 | //----------------------------------------------------------------------------
|
|---|
| 368 | DLL_CODE_API int FileSystem::Exists(const char *fname)
|
|---|
| 369 | // Returns true if the specified file exists.
|
|---|
| 370 | {
|
|---|
| 371 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 372 | return FS64Exists(fname);
|
|---|
| 373 |
|
|---|
| 374 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 375 | HANDLE hFile = CreateFile(fname,
|
|---|
| 376 | GENERIC_READ,
|
|---|
| 377 | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|---|
| 378 | NULL, // No security
|
|---|
| 379 | OPEN_EXISTING,
|
|---|
| 380 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 381 | NULL // No attr. template
|
|---|
| 382 | );
|
|---|
| 383 |
|
|---|
| 384 | if (hFile == INVALID_HANDLE_VALUE)
|
|---|
| 385 | {
|
|---|
| 386 | return 0;
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 | CloseHandle(hFile);
|
|---|
| 390 | return 1;
|
|---|
| 391 |
|
|---|
| 392 | #else // Use the 32-bit stdio version by default
|
|---|
| 393 | struct stat buf;
|
|---|
| 394 | return stat(fname, &buf) ==(FAU_t)0;
|
|---|
| 395 | #endif
|
|---|
| 396 | }
|
|---|
| 397 |
|
|---|
| 398 |
|
|---|
| 399 |
|
|---|
| 400 | //----------------------------------------------------------------------------
|
|---|
| 401 | // FAU_t FileSize(const _TCHAR *fname)
|
|---|
| 402 | //
|
|---|
| 403 | // Returns the length of the specified file or negative 1 to indicate an
|
|---|
| 404 | // error condition.
|
|---|
| 405 | //----------------------------------------------------------------------------
|
|---|
| 406 | DLL_CODE_API FAU_t FileSystem::FileSize(const char *fname)
|
|---|
| 407 | {
|
|---|
| 408 | #if defined(__64_BIT_FILE_SYSTEM__)
|
|---|
| 409 | return FS64FileSize(fname);
|
|---|
| 410 |
|
|---|
| 411 | #elif defined(__WIN32__) && defined(__NTFS__)
|
|---|
| 412 | HANDLE hFile = CreateFile(fname,
|
|---|
| 413 | GENERIC_READ,
|
|---|
| 414 | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|---|
| 415 | NULL, // No security
|
|---|
| 416 | OPEN_EXISTING,
|
|---|
| 417 | FILE_ATTRIBUTE_NORMAL,
|
|---|
| 418 | NULL // No attr. template
|
|---|
| 419 | );
|
|---|
| 420 |
|
|---|
| 421 | // Could not open the specified file
|
|---|
| 422 | if (hFile == INVALID_HANDLE_VALUE)
|
|---|
| 423 | {
|
|---|
| 424 | return (FAU_t) - 1;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | BY_HANDLE_FILE_INFORMATION info;
|
|---|
| 428 |
|
|---|
| 429 | if (GetFileInformationByHandle(hFile, &info) == 0)
|
|---|
| 430 | {
|
|---|
| 431 | return (FAU_t) - 1;
|
|---|
| 432 | }
|
|---|
| 433 | CloseHandle(hFile);
|
|---|
| 434 | return (FAU_t)info.nFileSizeLow;;
|
|---|
| 435 |
|
|---|
| 436 | #else // Use the 32-bit stdio version by default
|
|---|
| 437 | struct stat buf;
|
|---|
| 438 | int result = stat(fname, &buf);
|
|---|
| 439 | if (result != 0)
|
|---|
| 440 | return -1;
|
|---|
| 441 | return buf.st_size;
|
|---|
| 442 | #endif
|
|---|
| 443 | }
|
|---|
| 444 |
|
|---|
| 445 | // #include <io.h>
|
|---|
| 446 | // #include <share.h>
|
|---|
| 447 |
|
|---|
| 448 |
|
|---|
| 449 | // int FileSystem::CanOpenForWriting(const _TCHAR *fname)
|
|---|
| 450 | // {
|
|---|
| 451 | // // Try to open for writing
|
|---|
| 452 | // int fd = _tsopen(fname, _O_WRONLY | O_BINARY, _SH_DENYWR);
|
|---|
| 453 | // if (fd == -1)
|
|---|
| 454 | // return 0;
|
|---|
| 455 | // _close(fd);
|
|---|
| 456 | // return 1;
|
|---|
| 457 | // }
|
|---|
| 458 |
|
|---|
| 459 | // int FileSystem::CanOpenReadOnly(const _TCHAR *fname)
|
|---|
| 460 | // {
|
|---|
| 461 | // // Try to open for read only
|
|---|
| 462 | // int fd = _tsopen(fname, _O_RDONLY | O_BINARY, _SH_DENYNO);
|
|---|
| 463 | // if (fd == -1)
|
|---|
| 464 | // return 0;
|
|---|
| 465 | // _close(fd);
|
|---|
| 466 | // return 1;
|
|---|
| 467 | // }
|
|---|
| 468 |
|
|---|
| 469 | //----------------------------------------------------------------------------
|
|---|
| 470 | // int IsReadOnly(const _TCHAR* fname)
|
|---|
| 471 | //
|
|---|
| 472 | // Returns true if the specified file is read only.
|
|---|
| 473 | //----------------------------------------------------------------------------
|
|---|
| 474 | // int FileSystem::IsReadOnly(const _TCHAR *fname)
|
|---|
| 475 | // {
|
|---|
| 476 | // struct _stat buf;
|
|---|
| 477 | // _tstat(fname, &buf);
|
|---|
| 478 | // if (buf.st_mode & S_IWRITE)
|
|---|
| 479 | // return 0;
|
|---|
| 480 | // return 1;
|
|---|
| 481 | // }
|
|---|
| 482 |
|
|---|
