X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fac3b4232c5a2fa84f11897f4851d0a0e8a17755..25b34b267ec6878c04add03e874986673fa0f19f:/src/common/file.cpp diff --git a/src/common/file.cpp b/src/common/file.cpp index b662a72b34..b44087c38b 100644 --- a/src/common/file.cpp +++ b/src/common/file.cpp @@ -7,17 +7,13 @@ // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "file.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -28,8 +24,7 @@ #if wxUSE_FILE // standard -#if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__WXMICROWIN__) - #include +#if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) #ifndef __SALFORDC__ #define WIN32_LEAN_AND_MEAN @@ -54,16 +49,27 @@ #define NOMCX #endif - #include // for GetTempFileName +#elif defined(__WXMSW__) && defined(__WXWINCE__) + #include "wx/msw/missing.h" +#elif (defined(__OS2__)) + #include #elif (defined(__UNIX__) || defined(__GNUWIN32__)) #include + #include + #include #ifdef __GNUWIN32__ - #include + #include "wx/msw/wrapwin.h" + #endif +#elif defined(__DOS__) + #if defined(__WATCOMC__) + #include + #elif defined(__DJGPP__) + #include + #include + #include + #else + #error "Please specify the header with file functions declarations." #endif -#elif (defined(__WXPM__)) - #include - #define W_OK 2 - #define R_OK 4 #elif (defined(__WXSTUBS__)) // Have to ifdef this for different environments #include @@ -75,25 +81,23 @@ #endif char* mktemp( char * path ) { return path ;} #include - #define W_OK 2 - #define R_OK 4 - #include + #include #else #error "Please specify the header with file functions declarations." #endif //Win/UNIX #include // SEEK_xxx constants -#include // O_RDONLY &c -#ifndef __MWERKS__ - #include // needed for stat - #include // stat -#endif - -#if defined(__BORLANDC__) || defined(_MSC_VER) - #define W_OK 2 - #define R_OK 4 -#endif +// Windows compilers don't have these constants +#ifndef W_OK + enum + { + F_OK = 0, // test for existence + X_OK = 1, // execute permission + W_OK = 2, // write + R_OK = 4 // read + }; +#endif // W_OK // there is no distinction between text and binary files under Unix, so define // O_BINARY as 0 if the system headers don't do it already @@ -117,11 +121,25 @@ #define ACCESS(access) , (access) #endif // Salford C -// wxWindows -#include "wx/string.h" -#include "wx/intl.h" +// wxWidgets +#ifndef WX_PRECOMP + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/log.h" +#endif // !WX_PRECOMP + +#include "wx/filename.h" #include "wx/file.h" -#include "wx/log.h" +#include "wx/filefn.h" + +#ifdef __WXMSW__ + #include "wx/msw/mslu.h" +#endif + +#ifdef __WXWINCE__ + #include "wx/msw/private.h" +#endif + // ============================================================================ // implementation of wxFile @@ -130,28 +148,22 @@ // ---------------------------------------------------------------------------- // static functions // ---------------------------------------------------------------------------- + bool wxFile::Exists(const wxChar *name) { - wxStructStat st; -#if wxUSE_UNICODE && wxMBFILES - wxCharBuffer fname = wxConvFile.cWC2MB(name); - - return !wxAccess(fname, 0) && - !wxStat(wxMBSTRINGCAST fname, &st) && - (st.st_mode & S_IFREG); - -#else - return !wxAccess(name, 0) && - !wxStat(name, &st) && - (st.st_mode & S_IFREG); -#endif + return wxFileExists(name); } bool wxFile::Access(const wxChar *name, OpenMode mode) { - int how = 0; + int how; + + switch ( mode ) + { + default: + wxFAIL_MSG(wxT("bad wxFile::Access mode parameter.")); + // fall through - switch ( mode ) { case read: how = R_OK; break; @@ -160,11 +172,12 @@ bool wxFile::Access(const wxChar *name, OpenMode mode) how = W_OK; break; - default: - wxFAIL_MSG(wxT("bad wxFile::Access mode parameter.")); + case read_write: + how = R_OK | W_OK; + break; } - return wxAccess(wxFNCONV(name), how) == 0; + return wxAccess(name, how) == 0; } // ---------------------------------------------------------------------------- @@ -175,7 +188,7 @@ bool wxFile::Access(const wxChar *name, OpenMode mode) wxFile::wxFile(const wxChar *szFileName, OpenMode mode) { m_fd = fd_invalid; - m_error = FALSE; + m_error = false; Open(szFileName, mode); } @@ -185,24 +198,24 @@ bool wxFile::Create(const wxChar *szFileName, bool bOverwrite, int accessMode) { // if bOverwrite we create a new file or truncate the existing one, // otherwise we only create the new file and fail if it already exists -#if defined(__WXMAC__) && !defined(__UNIX__) - // Dominic Mazzoni [dmazzoni+@cs.cmu.edu] reports that open is still broken on the mac, so we replace - // int fd = open(wxUnix2MacFilename( szFileName ), O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access); - int fd = creat( szFileName , accessMode); +#if defined(__WXMAC__) && !defined(__UNIX__) && !wxUSE_UNICODE + // Dominic Mazzoni [dmazzoni+@cs.cmu.edu] reports that open is still broken on the mac, so we replace + // int fd = open( szFileName , O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access); + int fd = creat( szFileName , accessMode); #else - int fd = wxOpen(wxFNCONV(szFileName), - O_BINARY | O_WRONLY | O_CREAT | - (bOverwrite ? O_TRUNC : O_EXCL) - ACCESS(accessMode)); + int fd = wxOpen( szFileName, + O_BINARY | O_WRONLY | O_CREAT | + (bOverwrite ? O_TRUNC : O_EXCL) + ACCESS(accessMode) ); #endif - if ( fd == -1 ) { + if ( fd == -1 ) + { wxLogSysError(_("can't create file '%s'"), szFileName); - return FALSE; - } - else { - Attach(fd); - return TRUE; + return false; } + + Attach(fd); + return true; } // open the file @@ -210,7 +223,8 @@ bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) { int flags = O_BINARY; - switch ( mode ) { + switch ( mode ) + { case read: flags |= O_RDONLY; break; @@ -228,36 +242,49 @@ bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) flags |= O_WRONLY | O_CREAT | O_TRUNC; break; + case write_excl: + flags |= O_WRONLY | O_CREAT | O_EXCL; + break; + case read_write: flags |= O_RDWR; break; } - int fd = wxOpen(wxFNCONV(szFileName), flags ACCESS(accessMode)); - if ( fd == -1 ) { +#ifdef __WINDOWS__ + // only read/write bits for "all" are supported by this function under + // Windows, and VC++ 8 returns EINVAL if any other bits are used in + // accessMode, so clear them as they have at best no effect anyhow + accessMode &= wxS_IRUSR | wxS_IWUSR; +#endif // __WINDOWS__ + + int fd = wxOpen( szFileName, flags ACCESS(accessMode)); + + if ( fd == -1 ) + { wxLogSysError(_("can't open file '%s'"), szFileName); - return FALSE; - } - else { - Attach(fd); - return TRUE; + return false; } + + Attach(fd); + return true; } // close bool wxFile::Close() { if ( IsOpened() ) { - if ( close(m_fd) == -1 ) { + if (wxClose(m_fd) == -1) + { wxLogSysError(_("can't close file descriptor %d"), m_fd); m_fd = fd_invalid; - return FALSE; + return false; } else m_fd = fd_invalid; } - return TRUE; + return true; } // ---------------------------------------------------------------------------- @@ -265,21 +292,19 @@ bool wxFile::Close() // ---------------------------------------------------------------------------- // read -off_t wxFile::Read(void *pBuf, off_t nCount) +ssize_t wxFile::Read(void *pBuf, size_t nCount) { wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); -#ifdef __MWERKS__ - int iRc = ::read(m_fd, (char*) pBuf, nCount); -#else - int iRc = ::read(m_fd, pBuf, nCount); -#endif - if ( iRc == -1 ) { + ssize_t iRc = wxRead(m_fd, pBuf, nCount); + + if ( iRc == -1 ) + { wxLogSysError(_("can't read from file descriptor %d"), m_fd); return wxInvalidOffset; } - else - return (size_t)iRc; + + return iRc; } // write @@ -287,40 +312,35 @@ size_t wxFile::Write(const void *pBuf, size_t nCount) { wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); -#ifdef __MWERKS__ -#if __MSL__ >= 0x6000 - int iRc = ::write(m_fd, (void*) pBuf, nCount); -#else - int iRc = ::write(m_fd, (const char*) pBuf, nCount); -#endif -#else - int iRc = ::write(m_fd, pBuf, nCount); -#endif - if ( iRc == -1 ) { + ssize_t iRc = wxWrite(m_fd, pBuf, nCount); + + if ( iRc == -1 ) + { wxLogSysError(_("can't write to file descriptor %d"), m_fd); - m_error = TRUE; - return 0; + m_error = true; + iRc = 0; } - else - return iRc; + + return iRc; } // flush bool wxFile::Flush() { - if ( IsOpened() ) { -#if defined(__VISUALC__) || wxHAVE_FSYNC +#if defined(__VISUALC__) || defined(HAVE_FSYNC) + // fsync() only works on disk files and returns errors for pipes, don't + // call it then + if ( IsOpened() && GetKind() == wxFILE_KIND_DISK ) + { if ( wxFsync(m_fd) == -1 ) { wxLogSysError(_("can't flush file descriptor %d"), m_fd); - return FALSE; + return false; } -#else // no fsync - // just do nothing -#endif // fsync } +#endif // fsync - return TRUE; + return true; } // ---------------------------------------------------------------------------- @@ -328,9 +348,12 @@ bool wxFile::Flush() // ---------------------------------------------------------------------------- // seek -off_t wxFile::Seek(off_t ofs, wxSeekMode mode) +wxFileOffset wxFile::Seek(wxFileOffset ofs, wxSeekMode mode) { - wxASSERT( IsOpened() ); + wxASSERT_MSG( IsOpened(), _T("can't seek on closed file") ); + wxCHECK_MSG( ofs != wxInvalidOffset || mode != wxFromStart, + wxInvalidOffset, + _T("invalid absolute file offset") ); int origin; switch ( mode ) { @@ -350,59 +373,55 @@ off_t wxFile::Seek(off_t ofs, wxSeekMode mode) break; } - int iRc = lseek(m_fd, ofs, origin); - if ( iRc == -1 ) { + wxFileOffset iRc = wxSeek(m_fd, ofs, origin); + if ( iRc == wxInvalidOffset ) + { wxLogSysError(_("can't seek on file descriptor %d"), m_fd); - return wxInvalidOffset; } - else - return (off_t)iRc; + + return iRc; } -// get current off_t -off_t wxFile::Tell() const +// get current file offset +wxFileOffset wxFile::Tell() const { wxASSERT( IsOpened() ); - int iRc = wxTell(m_fd); - if ( iRc == -1 ) { + wxFileOffset iRc = wxTell(m_fd); + if ( iRc == wxInvalidOffset ) + { wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd); - return wxInvalidOffset; } - else - return (off_t)iRc; + + return iRc; } // get current file length -off_t wxFile::Length() const +wxFileOffset wxFile::Length() const { wxASSERT( IsOpened() ); -#ifdef __VISUALC__ - int iRc = _filelength(m_fd); -#else // !VC++ - int iRc = wxTell(m_fd); - if ( iRc != -1 ) { - // @ have to use const_cast :-( - int iLen = ((wxFile *)this)->SeekEnd(); - if ( iLen != -1 ) { + wxFileOffset iRc = Tell(); + if ( iRc != wxInvalidOffset ) { + // have to use const_cast :-( + wxFileOffset iLen = ((wxFile *)this)->SeekEnd(); + if ( iLen != wxInvalidOffset ) { // restore old position - if ( ((wxFile *)this)->Seek(iRc) == -1 ) { + if ( ((wxFile *)this)->Seek(iRc) == wxInvalidOffset ) { // error - iLen = -1; + iLen = wxInvalidOffset; } } iRc = iLen; } -#endif // VC++ - if ( iRc == -1 ) { + if ( iRc == wxInvalidOffset ) + { wxLogSysError(_("can't find length of file on file descriptor %d"), m_fd); - return wxInvalidOffset; } - else - return (off_t)iRc; + + return iRc; } // is end of file reached? @@ -410,36 +429,30 @@ bool wxFile::Eof() const { wxASSERT( IsOpened() ); - int iRc; + wxFileOffset iRc; -#if defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ ) || defined(__SALFORDC__) +#if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ ) || defined(__SALFORDC__) // @@ this doesn't work, of course, on unseekable file descriptors - off_t ofsCur = Tell(), + wxFileOffset ofsCur = Tell(), ofsMax = Length(); if ( ofsCur == wxInvalidOffset || ofsMax == wxInvalidOffset ) - iRc = -1; + iRc = wxInvalidOffset; else iRc = ofsCur == ofsMax; #else // Windows and "native" compiler - iRc = eof(m_fd); + iRc = wxEof(m_fd); #endif // Windows/Unix - switch ( iRc ) { - case 1: - break; - - case 0: - return FALSE; - - case -1: - wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd); - break; - - default: - wxFAIL_MSG(_("invalid eof() return value.")); - } + if ( iRc == 1) + {} + else if ( iRc == 0 ) + return false; + else if ( iRc == wxInvalidOffset ) + wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd); + else + wxFAIL_MSG(_("invalid eof() return value.")); - return TRUE; + return true; } // ============================================================================ @@ -449,6 +462,7 @@ bool wxFile::Eof() const // ---------------------------------------------------------------------------- // construction // ---------------------------------------------------------------------------- + wxTempFile::wxTempFile(const wxString& strName) { Open(strName); @@ -456,78 +470,56 @@ wxTempFile::wxTempFile(const wxString& strName) bool wxTempFile::Open(const wxString& strName) { - m_strName = strName; - - // we want to create the file in the same directory as strName because - // otherwise rename() in Commit() might not work (if the files are on - // different partitions for example). Unfortunately, the only standard - // (POSIX) temp file creation function tmpnam() can't do it. -#if defined(__UNIX__) || defined(__WXSTUBS__)|| defined( __WXMAC__ ) - static const wxChar *szMktempSuffix = wxT("XXXXXX"); - m_strTemp << strName << szMktempSuffix; - // can use the cast because length doesn't change - mktemp(wxMBSTRINGCAST m_strTemp.mb_str()); -#elif defined(__WXPM__) - // for now just create a file - // future enhancements can be to set some extended attributes for file systems - // OS/2 supports that have them (HPFS, FAT32) and security (HPFS386) - static const wxChar *szMktempSuffix = wxT("XXX"); - m_strTemp << strName << szMktempSuffix; - ::DosCreateDir(m_strTemp.GetWriteBuf(MAX_PATH), NULL); -#else // Windows - wxString strPath; - wxSplitPath(strName, &strPath, NULL, NULL); - if ( strPath.IsEmpty() ) - strPath = wxT('.'); // GetTempFileName will fail if we give it empty string -#ifdef __WIN32__ - if ( !GetTempFileName(strPath, wxT("wx_"),0, m_strTemp.GetWriteBuf(MAX_PATH)) ) -#else - // Not sure why MSVC++ 1.5 header defines first param as BYTE - bug? - if ( !GetTempFileName((BYTE) (DWORD)(const wxChar*) strPath, wxT("wx_"),0, m_strTemp.GetWriteBuf(MAX_PATH)) ) -#endif - wxLogLastError(wxT("GetTempFileName")); - m_strTemp.UngetWriteBuf(); -#endif // Windows/Unix + // we must have an absolute filename because otherwise CreateTempFileName() + // would create the temp file in $TMP (i.e. the system standard location + // for the temp files) which might be on another volume/drive/mount and + // wxRename()ing it later to m_strName from Commit() would then fail + // + // with the absolute filename, the temp file is created in the same + // directory as this one which ensures that wxRename() may work later + wxFileName fn(strName); + if ( !fn.IsAbsolute() ) + { + fn.Normalize(wxPATH_NORM_ABSOLUTE); + } + + m_strName = fn.GetFullPath(); + + m_strTemp = wxFileName::CreateTempFileName(m_strName, &m_file); + + if ( m_strTemp.empty() ) + { + // CreateTempFileName() failed + return false; + } - int access = wxS_DEFAULT; #ifdef __UNIX__ - // create the file with the same mode as the original one under Unix - mode_t umaskOld = 0; // just to suppress compiler warning - bool changedUmask; + // the temp file should have the same permissions as the original one + mode_t mode; wxStructStat st; - if ( stat(strName.fn_str(), &st) == 0 ) + if ( stat( (const char*) m_strName.fn_str(), &st) == 0 ) { - // this assumes that only lower bits of st_mode contain the access - // rights, but it's true for at least all Unices which have S_IXXXX() - // macros, so should not be less portable than using (not POSIX) - // S_IFREG &c - access = st.st_mode & 0777; - - // we want to create the file with exactly the same access rights as - // the original one, so disable the user's umask for the moment - umaskOld = umask(0); - changedUmask = TRUE; + mode = st.st_mode; } else { - // file probably didn't exist, just create with default mode _using_ - // user's umask (new files creation should respet umask) - changedUmask = FALSE; + // file probably didn't exist, just give it the default mode _using_ + // user's umask (new files creation should respect umask) + mode_t mask = umask(0777); + mode = 0666 & ~mask; + umask(mask); } -#endif // Unix - - bool ok = m_file.Open(m_strTemp, wxFile::write, access); -#ifdef __UNIX__ - if ( changedUmask ) + if ( chmod( (const char*) m_strTemp.fn_str(), mode) == -1 ) { - // restore umask now that the file is created - (void)umask(umaskOld); +#ifndef __OS2__ + wxLogSysError(_("Failed to set temporary file permissions")); +#endif } #endif // Unix - return ok; + return true; } // ---------------------------------------------------------------------------- @@ -546,15 +538,15 @@ bool wxTempFile::Commit() if ( wxFile::Exists(m_strName) && wxRemove(m_strName) != 0 ) { wxLogSysError(_("can't remove file '%s'"), m_strName.c_str()); - return FALSE; + return false; } - if ( wxRename(m_strTemp, m_strName) != 0 ) { + if ( !wxRenameFile(m_strTemp, m_strName) ) { wxLogSysError(_("can't commit changes to file '%s'"), m_strName.c_str()); - return FALSE; + return false; } - return TRUE; + return true; } void wxTempFile::Discard() @@ -564,5 +556,5 @@ void wxTempFile::Discard() wxLogSysError(_("can't remove temporary file '%s'"), m_strTemp.c_str()); } -#endif +#endif // wxUSE_FILE