| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: file.cpp |
| 3 | // Purpose: wxFile - encapsulates low-level "file descriptor" |
| 4 | // wxTempFile |
| 5 | // Author: Vadim Zeitlin |
| 6 | // Modified by: |
| 7 | // Created: 29/01/98 |
| 8 | // RCS-ID: $Id$ |
| 9 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| 10 | // Licence: wxWindows licence |
| 11 | ///////////////////////////////////////////////////////////////////////////// |
| 12 | |
| 13 | // ---------------------------------------------------------------------------- |
| 14 | // headers |
| 15 | // ---------------------------------------------------------------------------- |
| 16 | |
| 17 | #ifdef __GNUG__ |
| 18 | #pragma implementation "file.h" |
| 19 | #endif |
| 20 | |
| 21 | // For compilers that support precompilation, includes "wx.h". |
| 22 | #include "wx/wxprec.h" |
| 23 | |
| 24 | #ifdef __BORLANDC__ |
| 25 | #pragma hdrstop |
| 26 | #endif |
| 27 | |
| 28 | #if wxUSE_FILE |
| 29 | |
| 30 | // standard |
| 31 | #if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) |
| 32 | #include <io.h> |
| 33 | |
| 34 | #ifndef __SALFORDC__ |
| 35 | #define WIN32_LEAN_AND_MEAN |
| 36 | #define NOSERVICE |
| 37 | #define NOIME |
| 38 | #define NOATOM |
| 39 | #define NOGDI |
| 40 | #define NOGDICAPMASKS |
| 41 | #define NOMETAFILE |
| 42 | #define NOMINMAX |
| 43 | #define NOMSG |
| 44 | #define NOOPENFILE |
| 45 | #define NORASTEROPS |
| 46 | #define NOSCROLL |
| 47 | #define NOSOUND |
| 48 | #define NOSYSMETRICS |
| 49 | #define NOTEXTMETRIC |
| 50 | #define NOWH |
| 51 | #define NOCOMM |
| 52 | #define NOKANJI |
| 53 | #define NOCRYPT |
| 54 | #define NOMCX |
| 55 | #endif |
| 56 | |
| 57 | #elif defined(__WXMSW__) && defined(__WXWINCE__) |
| 58 | // TODO: what to include? |
| 59 | #elif (defined(__UNIX__) || defined(__GNUWIN32__)) |
| 60 | #include <unistd.h> |
| 61 | #include <sys/stat.h> |
| 62 | #ifdef __GNUWIN32__ |
| 63 | #include "wx/msw/wrapwin.h" |
| 64 | #endif |
| 65 | #elif defined(__DOS__) |
| 66 | #if defined(__WATCOMC__) |
| 67 | #include <io.h> |
| 68 | #elif defined(__DJGPP__) |
| 69 | #include <io.h> |
| 70 | #include <unistd.h> |
| 71 | #include <stdio.h> |
| 72 | #else |
| 73 | #error "Please specify the header with file functions declarations." |
| 74 | #endif |
| 75 | #elif (defined(__WXPM__)) |
| 76 | #include <io.h> |
| 77 | #elif (defined(__WXSTUBS__)) |
| 78 | // Have to ifdef this for different environments |
| 79 | #include <io.h> |
| 80 | #elif (defined(__WXMAC__)) |
| 81 | #if __MSL__ < 0x6000 |
| 82 | int access( const char *path, int mode ) { return 0 ; } |
| 83 | #else |
| 84 | int _access( const char *path, int mode ) { return 0 ; } |
| 85 | #endif |
| 86 | char* mktemp( char * path ) { return path ;} |
| 87 | #include <stat.h> |
| 88 | #include <unistd.h> |
| 89 | #else |
| 90 | #error "Please specify the header with file functions declarations." |
| 91 | #endif //Win/UNIX |
| 92 | |
| 93 | #include <stdio.h> // SEEK_xxx constants |
| 94 | |
| 95 | #ifndef __WXWINCE__ |
| 96 | #include <fcntl.h> // O_RDONLY &c |
| 97 | #endif |
| 98 | |
| 99 | #ifdef __WXWINCE__ |
| 100 | // Nothing |
| 101 | #elif !defined(__MWERKS__) |
| 102 | #include <sys/types.h> // needed for stat |
| 103 | #include <sys/stat.h> // stat |
| 104 | #elif defined(__MWERKS__) && ( defined(__WXMSW__) || defined(__MACH__) ) |
| 105 | #include <sys/types.h> // needed for stat |
| 106 | #include <sys/stat.h> // stat |
| 107 | #endif |
| 108 | |
| 109 | // Windows compilers don't have these constants |
| 110 | #ifndef W_OK |
| 111 | enum |
| 112 | { |
| 113 | F_OK = 0, // test for existence |
| 114 | X_OK = 1, // execute permission |
| 115 | W_OK = 2, // write |
| 116 | R_OK = 4 // read |
| 117 | }; |
| 118 | #endif // W_OK |
| 119 | |
| 120 | // there is no distinction between text and binary files under Unix, so define |
| 121 | // O_BINARY as 0 if the system headers don't do it already |
| 122 | #if defined(__UNIX__) && !defined(O_BINARY) |
| 123 | #define O_BINARY (0) |
| 124 | #endif //__UNIX__ |
| 125 | |
| 126 | #ifdef __SALFORDC__ |
| 127 | #include <unix.h> |
| 128 | #endif |
| 129 | |
| 130 | #ifndef MAX_PATH |
| 131 | #define MAX_PATH 512 |
| 132 | #endif |
| 133 | |
| 134 | // some broken compilers don't have 3rd argument in open() and creat() |
| 135 | #ifdef __SALFORDC__ |
| 136 | #define ACCESS(access) |
| 137 | #define stat _stat |
| 138 | #else // normal compiler |
| 139 | #define ACCESS(access) , (access) |
| 140 | #endif // Salford C |
| 141 | |
| 142 | // wxWindows |
| 143 | #ifndef WX_PRECOMP |
| 144 | #include "wx/string.h" |
| 145 | #include "wx/intl.h" |
| 146 | #include "wx/log.h" |
| 147 | #endif // !WX_PRECOMP |
| 148 | |
| 149 | #include "wx/filename.h" |
| 150 | #include "wx/file.h" |
| 151 | #include "wx/filefn.h" |
| 152 | |
| 153 | #ifdef __WXMSW__ |
| 154 | #include "wx/msw/mslu.h" |
| 155 | #endif |
| 156 | |
| 157 | #ifdef __WXWINCE__ |
| 158 | #include "wx/msw/private.h" |
| 159 | #endif |
| 160 | |
| 161 | // ============================================================================ |
| 162 | // implementation of wxFile |
| 163 | // ============================================================================ |
| 164 | |
| 165 | // ---------------------------------------------------------------------------- |
| 166 | // static functions |
| 167 | // ---------------------------------------------------------------------------- |
| 168 | |
| 169 | bool wxFile::Exists(const wxChar *name) |
| 170 | { |
| 171 | return wxFileExists(name); |
| 172 | } |
| 173 | |
| 174 | bool wxFile::Access(const wxChar *name, OpenMode mode) |
| 175 | { |
| 176 | int how; |
| 177 | |
| 178 | switch ( mode ) |
| 179 | { |
| 180 | default: |
| 181 | wxFAIL_MSG(wxT("bad wxFile::Access mode parameter.")); |
| 182 | // fall through |
| 183 | |
| 184 | case read: |
| 185 | how = R_OK; |
| 186 | break; |
| 187 | |
| 188 | case write: |
| 189 | how = W_OK; |
| 190 | break; |
| 191 | |
| 192 | case read_write: |
| 193 | how = R_OK | W_OK; |
| 194 | break; |
| 195 | } |
| 196 | |
| 197 | #ifdef __WXWINCE__ |
| 198 | // FIXME: use CreateFile with 0 access to query the file |
| 199 | return TRUE; |
| 200 | #else |
| 201 | return wxAccess(name, how) == 0; |
| 202 | #endif |
| 203 | } |
| 204 | |
| 205 | // ---------------------------------------------------------------------------- |
| 206 | // opening/closing |
| 207 | // ---------------------------------------------------------------------------- |
| 208 | |
| 209 | // ctors |
| 210 | wxFile::wxFile(const wxChar *szFileName, OpenMode mode) |
| 211 | { |
| 212 | m_fd = fd_invalid; |
| 213 | m_error = FALSE; |
| 214 | |
| 215 | Open(szFileName, mode); |
| 216 | } |
| 217 | |
| 218 | // create the file, fail if it already exists and bOverwrite |
| 219 | bool wxFile::Create(const wxChar *szFileName, bool bOverwrite, int accessMode) |
| 220 | { |
| 221 | // if bOverwrite we create a new file or truncate the existing one, |
| 222 | // otherwise we only create the new file and fail if it already exists |
| 223 | #if defined(__WXMAC__) && !defined(__UNIX__) && !wxUSE_UNICODE |
| 224 | // Dominic Mazzoni [dmazzoni+@cs.cmu.edu] reports that open is still broken on the mac, so we replace |
| 225 | // int fd = open(wxUnix2MacFilename( szFileName ), O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access); |
| 226 | int fd = creat( szFileName , accessMode); |
| 227 | #else |
| 228 | #ifdef __WXWINCE__ |
| 229 | HANDLE fileHandle = ::CreateFile(szFileName, GENERIC_WRITE, 0, NULL, |
| 230 | bOverwrite ? CREATE_ALWAYS : CREATE_NEW, FILE_ATTRIBUTE_NORMAL, |
| 231 | 0); |
| 232 | int fd = 0; |
| 233 | if (fileHandle == INVALID_HANDLE_VALUE) |
| 234 | fd = (int) fileHandle; |
| 235 | else |
| 236 | fd = -1; |
| 237 | #else |
| 238 | int fd = wxOpen( szFileName, |
| 239 | O_BINARY | O_WRONLY | O_CREAT | |
| 240 | (bOverwrite ? O_TRUNC : O_EXCL) |
| 241 | ACCESS(accessMode) ); |
| 242 | #endif |
| 243 | #endif |
| 244 | if ( fd == -1 ) |
| 245 | { |
| 246 | wxLogSysError(_("can't create file '%s'"), szFileName); |
| 247 | return FALSE; |
| 248 | } |
| 249 | else |
| 250 | { |
| 251 | Attach(fd); |
| 252 | return TRUE; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | // open the file |
| 257 | bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) |
| 258 | { |
| 259 | #ifdef __WXWINCE__ |
| 260 | DWORD access = 0; |
| 261 | DWORD shareMode = 0; |
| 262 | DWORD disposition = 0; |
| 263 | |
| 264 | int flags = O_BINARY; |
| 265 | |
| 266 | switch ( mode ) |
| 267 | { |
| 268 | case read: |
| 269 | access = GENERIC_READ; |
| 270 | shareMode = FILE_SHARE_READ|FILE_SHARE_WRITE; |
| 271 | disposition = OPEN_EXISTING; |
| 272 | break; |
| 273 | |
| 274 | case write_append: |
| 275 | if ( wxFile::Exists(szFileName) ) |
| 276 | { |
| 277 | access = GENERIC_READ|GENERIC_WRITE; |
| 278 | shareMode = FILE_SHARE_READ; |
| 279 | disposition = 0; |
| 280 | break; |
| 281 | } |
| 282 | //else: fall through as write_append is the same as write if the |
| 283 | // file doesn't exist |
| 284 | |
| 285 | case write: |
| 286 | access = GENERIC_WRITE; |
| 287 | shareMode = 0; |
| 288 | disposition = TRUNCATE_EXISTING; |
| 289 | break; |
| 290 | |
| 291 | case write_excl: |
| 292 | access = GENERIC_WRITE; |
| 293 | shareMode = 0; |
| 294 | disposition = TRUNCATE_EXISTING; |
| 295 | break; |
| 296 | |
| 297 | case read_write: |
| 298 | access = GENERIC_READ|GENERIC_WRITE; |
| 299 | shareMode = 0; |
| 300 | disposition = 0; |
| 301 | break; |
| 302 | } |
| 303 | |
| 304 | int fd = 0; |
| 305 | HANDLE fileHandle = ::CreateFile(szFileName, access, shareMode, NULL, |
| 306 | disposition, FILE_ATTRIBUTE_NORMAL, 0); |
| 307 | if (fileHandle == INVALID_HANDLE_VALUE) |
| 308 | fd = -1; |
| 309 | else |
| 310 | fd = (int) fileHandle; |
| 311 | #else |
| 312 | int flags = O_BINARY; |
| 313 | |
| 314 | switch ( mode ) |
| 315 | { |
| 316 | case read: |
| 317 | flags |= O_RDONLY; |
| 318 | break; |
| 319 | |
| 320 | case write_append: |
| 321 | if ( wxFile::Exists(szFileName) ) |
| 322 | { |
| 323 | flags |= O_WRONLY | O_APPEND; |
| 324 | break; |
| 325 | } |
| 326 | //else: fall through as write_append is the same as write if the |
| 327 | // file doesn't exist |
| 328 | |
| 329 | case write: |
| 330 | flags |= O_WRONLY | O_CREAT | O_TRUNC; |
| 331 | break; |
| 332 | |
| 333 | case write_excl: |
| 334 | flags |= O_WRONLY | O_CREAT | O_EXCL; |
| 335 | break; |
| 336 | |
| 337 | case read_write: |
| 338 | flags |= O_RDWR; |
| 339 | break; |
| 340 | } |
| 341 | |
| 342 | int fd = wxOpen( szFileName, flags ACCESS(accessMode)); |
| 343 | #endif |
| 344 | if ( fd == -1 ) |
| 345 | { |
| 346 | wxLogSysError(_("can't open file '%s'"), szFileName); |
| 347 | return FALSE; |
| 348 | } |
| 349 | else { |
| 350 | Attach(fd); |
| 351 | return TRUE; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | // close |
| 356 | bool wxFile::Close() |
| 357 | { |
| 358 | if ( IsOpened() ) { |
| 359 | #ifdef __WXWINCE__ |
| 360 | if (!CloseHandle((HANDLE) m_fd)) |
| 361 | #else |
| 362 | if ( close(m_fd) == -1 ) |
| 363 | #endif |
| 364 | { |
| 365 | wxLogSysError(_("can't close file descriptor %d"), m_fd); |
| 366 | m_fd = fd_invalid; |
| 367 | return FALSE; |
| 368 | } |
| 369 | else |
| 370 | m_fd = fd_invalid; |
| 371 | } |
| 372 | |
| 373 | return TRUE; |
| 374 | } |
| 375 | |
| 376 | // ---------------------------------------------------------------------------- |
| 377 | // read/write |
| 378 | // ---------------------------------------------------------------------------- |
| 379 | |
| 380 | // read |
| 381 | off_t wxFile::Read(void *pBuf, off_t nCount) |
| 382 | { |
| 383 | wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); |
| 384 | |
| 385 | #ifdef __WXWINCE__ |
| 386 | DWORD bytesRead = 0; |
| 387 | int iRc = 0; |
| 388 | if (ReadFile((HANDLE) m_fd, pBuf, (DWORD) nCount, & bytesRead, NULL)) |
| 389 | iRc = bytesRead; |
| 390 | else |
| 391 | iRc = -1; |
| 392 | #elif defined(__MWERKS__) |
| 393 | int iRc = ::read(m_fd, (char*) pBuf, nCount); |
| 394 | #else |
| 395 | int iRc = ::read(m_fd, pBuf, nCount); |
| 396 | #endif |
| 397 | if ( iRc == -1 ) { |
| 398 | wxLogSysError(_("can't read from file descriptor %d"), m_fd); |
| 399 | return wxInvalidOffset; |
| 400 | } |
| 401 | else |
| 402 | return (size_t)iRc; |
| 403 | } |
| 404 | |
| 405 | // write |
| 406 | size_t wxFile::Write(const void *pBuf, size_t nCount) |
| 407 | { |
| 408 | wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); |
| 409 | |
| 410 | #ifdef __WXWINCE__ |
| 411 | DWORD bytesRead = 0; |
| 412 | int iRc = 0; |
| 413 | if (WriteFile((HANDLE) m_fd, pBuf, (DWORD) nCount, & bytesRead, NULL)) |
| 414 | iRc = bytesRead; |
| 415 | else |
| 416 | iRc = -1; |
| 417 | #elif defined(__MWERKS__) |
| 418 | #if __MSL__ >= 0x6000 |
| 419 | int iRc = ::write(m_fd, (void*) pBuf, nCount); |
| 420 | #else |
| 421 | int iRc = ::write(m_fd, (const char*) pBuf, nCount); |
| 422 | #endif |
| 423 | #else |
| 424 | int iRc = ::write(m_fd, pBuf, nCount); |
| 425 | #endif |
| 426 | if ( iRc == -1 ) { |
| 427 | wxLogSysError(_("can't write to file descriptor %d"), m_fd); |
| 428 | m_error = TRUE; |
| 429 | return 0; |
| 430 | } |
| 431 | else |
| 432 | return iRc; |
| 433 | } |
| 434 | |
| 435 | // flush |
| 436 | bool wxFile::Flush() |
| 437 | { |
| 438 | if ( IsOpened() ) { |
| 439 | #ifdef __WXWINCE__ |
| 440 | // Do nothing |
| 441 | #elif defined(__VISUALC__) || wxHAVE_FSYNC |
| 442 | if ( wxFsync(m_fd) == -1 ) |
| 443 | { |
| 444 | wxLogSysError(_("can't flush file descriptor %d"), m_fd); |
| 445 | return FALSE; |
| 446 | } |
| 447 | #else // no fsync |
| 448 | // just do nothing |
| 449 | #endif // fsync |
| 450 | } |
| 451 | |
| 452 | return TRUE; |
| 453 | } |
| 454 | |
| 455 | // ---------------------------------------------------------------------------- |
| 456 | // seek |
| 457 | // ---------------------------------------------------------------------------- |
| 458 | |
| 459 | // seek |
| 460 | off_t wxFile::Seek(off_t ofs, wxSeekMode mode) |
| 461 | { |
| 462 | wxASSERT( IsOpened() ); |
| 463 | |
| 464 | #ifdef __WXWINCE__ |
| 465 | int origin; |
| 466 | switch ( mode ) { |
| 467 | default: |
| 468 | wxFAIL_MSG(_("unknown seek origin")); |
| 469 | |
| 470 | case wxFromStart: |
| 471 | origin = FILE_BEGIN; |
| 472 | break; |
| 473 | |
| 474 | case wxFromCurrent: |
| 475 | origin = FILE_CURRENT; |
| 476 | break; |
| 477 | |
| 478 | case wxFromEnd: |
| 479 | origin = FILE_END; |
| 480 | break; |
| 481 | } |
| 482 | |
| 483 | DWORD res = SetFilePointer((HANDLE) m_fd, ofs, 0, origin) ; |
| 484 | if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR) |
| 485 | { |
| 486 | wxLogSysError(_("can't seek on file descriptor %d"), m_fd); |
| 487 | return wxInvalidOffset; |
| 488 | } |
| 489 | else |
| 490 | return (off_t)res; |
| 491 | #else |
| 492 | int origin; |
| 493 | switch ( mode ) { |
| 494 | default: |
| 495 | wxFAIL_MSG(_("unknown seek origin")); |
| 496 | |
| 497 | case wxFromStart: |
| 498 | origin = SEEK_SET; |
| 499 | break; |
| 500 | |
| 501 | case wxFromCurrent: |
| 502 | origin = SEEK_CUR; |
| 503 | break; |
| 504 | |
| 505 | case wxFromEnd: |
| 506 | origin = SEEK_END; |
| 507 | break; |
| 508 | } |
| 509 | |
| 510 | int iRc = lseek(m_fd, ofs, origin); |
| 511 | if ( iRc == -1 ) { |
| 512 | wxLogSysError(_("can't seek on file descriptor %d"), m_fd); |
| 513 | return wxInvalidOffset; |
| 514 | } |
| 515 | else |
| 516 | return (off_t)iRc; |
| 517 | #endif |
| 518 | } |
| 519 | |
| 520 | // get current off_t |
| 521 | off_t wxFile::Tell() const |
| 522 | { |
| 523 | wxASSERT( IsOpened() ); |
| 524 | |
| 525 | #ifdef __WXWINCE__ |
| 526 | DWORD res = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT) ; |
| 527 | if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR) |
| 528 | { |
| 529 | wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd); |
| 530 | return wxInvalidOffset; |
| 531 | } |
| 532 | else |
| 533 | return (off_t)res; |
| 534 | #else |
| 535 | int iRc = wxTell(m_fd); |
| 536 | if ( iRc == -1 ) { |
| 537 | wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd); |
| 538 | return wxInvalidOffset; |
| 539 | } |
| 540 | else |
| 541 | return (off_t)iRc; |
| 542 | #endif |
| 543 | } |
| 544 | |
| 545 | // get current file length |
| 546 | off_t wxFile::Length() const |
| 547 | { |
| 548 | wxASSERT( IsOpened() ); |
| 549 | |
| 550 | #ifdef __WXWINCE__ |
| 551 | DWORD off0 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT); |
| 552 | DWORD off1 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_END); |
| 553 | off_t len = off1; |
| 554 | |
| 555 | // Restore position |
| 556 | SetFilePointer((HANDLE) m_fd, off0, 0, FILE_BEGIN); |
| 557 | return len; |
| 558 | #else |
| 559 | #ifdef __VISUALC__ |
| 560 | int iRc = _filelength(m_fd); |
| 561 | #else // !VC++ |
| 562 | int iRc = wxTell(m_fd); |
| 563 | if ( iRc != -1 ) { |
| 564 | // @ have to use const_cast :-( |
| 565 | int iLen = ((wxFile *)this)->SeekEnd(); |
| 566 | if ( iLen != -1 ) { |
| 567 | // restore old position |
| 568 | if ( ((wxFile *)this)->Seek(iRc) == -1 ) { |
| 569 | // error |
| 570 | iLen = -1; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | iRc = iLen; |
| 575 | } |
| 576 | #endif // VC++ |
| 577 | |
| 578 | if ( iRc == -1 ) { |
| 579 | wxLogSysError(_("can't find length of file on file descriptor %d"), m_fd); |
| 580 | return wxInvalidOffset; |
| 581 | } |
| 582 | else |
| 583 | return (off_t)iRc; |
| 584 | #endif |
| 585 | } |
| 586 | |
| 587 | // is end of file reached? |
| 588 | bool wxFile::Eof() const |
| 589 | { |
| 590 | wxASSERT( IsOpened() ); |
| 591 | |
| 592 | #ifdef __WXWINCE__ |
| 593 | DWORD off0 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT); |
| 594 | DWORD off1 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_END); |
| 595 | if (off0 == off1) |
| 596 | return TRUE; |
| 597 | else |
| 598 | { |
| 599 | SetFilePointer((HANDLE) m_fd, off0, 0, FILE_BEGIN); |
| 600 | return FALSE; |
| 601 | } |
| 602 | #else |
| 603 | int iRc; |
| 604 | |
| 605 | #if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ ) || defined(__SALFORDC__) |
| 606 | // @@ this doesn't work, of course, on unseekable file descriptors |
| 607 | off_t ofsCur = Tell(), |
| 608 | ofsMax = Length(); |
| 609 | if ( ofsCur == wxInvalidOffset || ofsMax == wxInvalidOffset ) |
| 610 | iRc = -1; |
| 611 | else |
| 612 | iRc = ofsCur == ofsMax; |
| 613 | #else // Windows and "native" compiler |
| 614 | iRc = eof(m_fd); |
| 615 | #endif // Windows/Unix |
| 616 | |
| 617 | switch ( iRc ) { |
| 618 | case 1: |
| 619 | break; |
| 620 | |
| 621 | case 0: |
| 622 | return FALSE; |
| 623 | |
| 624 | case -1: |
| 625 | wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd); |
| 626 | break; |
| 627 | |
| 628 | default: |
| 629 | wxFAIL_MSG(_("invalid eof() return value.")); |
| 630 | } |
| 631 | |
| 632 | return TRUE; |
| 633 | #endif |
| 634 | } |
| 635 | |
| 636 | // ============================================================================ |
| 637 | // implementation of wxTempFile |
| 638 | // ============================================================================ |
| 639 | |
| 640 | // ---------------------------------------------------------------------------- |
| 641 | // construction |
| 642 | // ---------------------------------------------------------------------------- |
| 643 | |
| 644 | wxTempFile::wxTempFile(const wxString& strName) |
| 645 | { |
| 646 | Open(strName); |
| 647 | } |
| 648 | |
| 649 | bool wxTempFile::Open(const wxString& strName) |
| 650 | { |
| 651 | // we must have an absolute filename because otherwise CreateTempFileName() |
| 652 | // would create the temp file in $TMP (i.e. the system standard location |
| 653 | // for the temp files) which might be on another volume/drive/mount and |
| 654 | // wxRename()ing it later to m_strName from Commit() would then fail |
| 655 | // |
| 656 | // with the absolute filename, the temp file is created in the same |
| 657 | // directory as this one which ensures that wxRename() may work later |
| 658 | wxFileName fn(strName); |
| 659 | if ( !fn.IsAbsolute() ) |
| 660 | { |
| 661 | fn.Normalize(wxPATH_NORM_ABSOLUTE); |
| 662 | } |
| 663 | |
| 664 | m_strName = fn.GetFullPath(); |
| 665 | |
| 666 | m_strTemp = wxFileName::CreateTempFileName(m_strName, &m_file); |
| 667 | |
| 668 | if ( m_strTemp.empty() ) |
| 669 | { |
| 670 | // CreateTempFileName() failed |
| 671 | return FALSE; |
| 672 | } |
| 673 | |
| 674 | #ifdef __UNIX__ |
| 675 | // the temp file should have the same permissions as the original one |
| 676 | mode_t mode; |
| 677 | |
| 678 | wxStructStat st; |
| 679 | if ( stat( (const char*) m_strName.fn_str(), &st) == 0 ) |
| 680 | { |
| 681 | mode = st.st_mode; |
| 682 | } |
| 683 | else |
| 684 | { |
| 685 | // file probably didn't exist, just give it the default mode _using_ |
| 686 | // user's umask (new files creation should respect umask) |
| 687 | mode_t mask = umask(0777); |
| 688 | mode = 0666 & ~mask; |
| 689 | umask(mask); |
| 690 | } |
| 691 | |
| 692 | if ( chmod( (const char*) m_strTemp.fn_str(), mode) == -1 ) |
| 693 | { |
| 694 | wxLogSysError(_("Failed to set temporary file permissions")); |
| 695 | } |
| 696 | #endif // Unix |
| 697 | |
| 698 | return TRUE; |
| 699 | } |
| 700 | |
| 701 | // ---------------------------------------------------------------------------- |
| 702 | // destruction |
| 703 | // ---------------------------------------------------------------------------- |
| 704 | |
| 705 | wxTempFile::~wxTempFile() |
| 706 | { |
| 707 | if ( IsOpened() ) |
| 708 | Discard(); |
| 709 | } |
| 710 | |
| 711 | bool wxTempFile::Commit() |
| 712 | { |
| 713 | m_file.Close(); |
| 714 | |
| 715 | if ( wxFile::Exists(m_strName) && wxRemove(m_strName) != 0 ) { |
| 716 | wxLogSysError(_("can't remove file '%s'"), m_strName.c_str()); |
| 717 | return FALSE; |
| 718 | } |
| 719 | |
| 720 | if ( !wxRenameFile(m_strTemp, m_strName) ) { |
| 721 | wxLogSysError(_("can't commit changes to file '%s'"), m_strName.c_str()); |
| 722 | return FALSE; |
| 723 | } |
| 724 | |
| 725 | return TRUE; |
| 726 | } |
| 727 | |
| 728 | void wxTempFile::Discard() |
| 729 | { |
| 730 | m_file.Close(); |
| 731 | if ( wxRemove(m_strTemp) != 0 ) |
| 732 | wxLogSysError(_("can't remove temporary file '%s'"), m_strTemp.c_str()); |
| 733 | } |
| 734 | |
| 735 | #endif // wxUSE_FILE |
| 736 | |