X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3096bd2fa7b88105bc54c08e3c878585de1a9b91..beb471b5e9c8e383d906d4234a809b6b3d2f7a0f:/src/common/file.cpp diff --git a/src/common/file.cpp b/src/common/file.cpp index 39e03cddf4..da27b425d1 100644 --- a/src/common/file.cpp +++ b/src/common/file.cpp @@ -7,7 +7,7 @@ // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ---------------------------------------------------------------------------- @@ -28,7 +28,7 @@ #if wxUSE_FILE // standard -#if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXWINE__) +#if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) #include #ifndef __SALFORDC__ @@ -54,76 +54,72 @@ #define NOMCX #endif - #include // for GetTempFileName +#elif defined(__WXMSW__) && defined(__WXWINCE__) + // TODO: what to include? #elif (defined(__UNIX__) || defined(__GNUWIN32__)) #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 - #include - #define W_OK 2 - #define R_OK 4 #elif (defined(__WXSTUBS__)) // Have to ifdef this for different environments #include #elif (defined(__WXMAC__)) +#if __MSL__ < 0x6000 int access( const char *path, int mode ) { return 0 ; } +#else + int _access( const char *path, int mode ) { return 0 ; } +#endif char* mktemp( char * path ) { return path ;} + #include #include - #include - #define W_OK 2 - #define R_OK 4 #else #error "Please specify the header with file functions declarations." #endif //Win/UNIX #include // SEEK_xxx constants + +#ifndef __WXWINCE__ #include // O_RDONLY &c +#endif -#ifndef __MWERKS__ +#ifdef __WXWINCE__ +// Nothing +#elif !defined(__MWERKS__) + #include // needed for stat + #include // stat +#elif defined(__MWERKS__) && ( defined(__WXMSW__) || defined(__MACH__) ) #include // needed for stat #include // stat #endif -// Microsoft compiler loves underscores, feed them to it -#ifdef __VISUALC__ - // functions - #define open _open - #define close _close - #define read _read - #define write _write - #define lseek _lseek - #define fsync _commit - #define access _access - #define eof _eof - - // types - #define stat _stat - - // constants - - #define O_RDONLY _O_RDONLY - #define O_WRONLY _O_WRONLY - #define O_RDWR _O_RDWR - #define O_EXCL _O_EXCL - #define O_CREAT _O_CREAT - #define O_BINARY _O_BINARY - - #define S_IFDIR _S_IFDIR - #define S_IFREG _S_IFREG -#else - #define tell(fd) lseek(fd, 0, SEEK_CUR) -#endif // VC++ - -#if defined(__BORLANDC__) || defined(_MSC_VER) - #define W_OK 2 - #define R_OK 4 -#endif - -// there is no distinction between text and binary files under Unix -#ifdef __UNIX__ +// 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 +#if defined(__UNIX__) && !defined(O_BINARY) #define O_BINARY (0) #endif //__UNIX__ @@ -131,22 +127,10 @@ #include #endif -// wxWindows -#include "wx/string.h" -#include "wx/intl.h" -#include "wx/file.h" -#include "wx/log.h" - #ifndef MAX_PATH #define MAX_PATH 512 #endif -#ifdef __WXMAC__ - char gwxMacFileName[ MAX_PATH ] ; - char gwxMacFileName2[ MAX_PATH ] ; - char gwxMacFileName3[ MAX_PATH ] ; -#endif - // some broken compilers don't have 3rd argument in open() and creat() #ifdef __SALFORDC__ #define ACCESS(access) @@ -155,6 +139,25 @@ #define ACCESS(access) , (access) #endif // Salford C +// wxWindows +#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/filefn.h" + +#ifdef __WXMSW__ + #include "wx/msw/mslu.h" +#endif + +#ifdef __WXWINCE__ + #include "wx/msw/private.h" +#endif + // ============================================================================ // implementation of wxFile // ============================================================================ @@ -162,27 +165,22 @@ // ---------------------------------------------------------------------------- // static functions // ---------------------------------------------------------------------------- + bool wxFile::Exists(const wxChar *name) { - struct stat st; -#if wxUSE_UNICODE && wxMBFILES - wxCharBuffer fname = wxConvFile.cWC2MB(name); - - return !access(fname, 0) && - !stat(wxMBSTRINGCAST fname, &st) && - (st.st_mode & S_IFREG); -#else - return !access(name, 0) && - !stat((wxChar*) 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; @@ -191,11 +189,17 @@ 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 access(wxFNCONV(name), how) == 0; +#ifdef __WXWINCE__ + // FIXME: use CreateFile with 0 access to query the file + return TRUE; +#else + return wxAccess(name, how) == 0; +#endif } // ---------------------------------------------------------------------------- @@ -216,15 +220,34 @@ 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 - int fd = open(wxFNCONV(szFileName), - O_WRONLY | O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL) - ACCESS(accessMode)); - - if ( fd == -1 ) { +#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(wxUnix2MacFilename( szFileName ), O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access); + int fd = creat( szFileName , accessMode); +#else +#ifdef __WXWINCE__ + HANDLE fileHandle = ::CreateFile(szFileName, GENERIC_WRITE, 0, NULL, + bOverwrite ? CREATE_ALWAYS : CREATE_NEW, FILE_ATTRIBUTE_NORMAL, + 0); + int fd = 0; + if (fileHandle == INVALID_HANDLE_VALUE) + fd = (int) fileHandle; + else + fd = -1; +#else + int fd = wxOpen( szFileName, + O_BINARY | O_WRONLY | O_CREAT | + (bOverwrite ? O_TRUNC : O_EXCL) + ACCESS(accessMode) ); +#endif +#endif + if ( fd == -1 ) + { wxLogSysError(_("can't create file '%s'"), szFileName); return FALSE; } - else { + else + { Attach(fd); return TRUE; } @@ -233,19 +256,82 @@ bool wxFile::Create(const wxChar *szFileName, bool bOverwrite, int accessMode) // open the file bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) { +#ifdef __WXWINCE__ + DWORD access = 0; + DWORD shareMode = 0; + DWORD disposition = 0; + int flags = O_BINARY; - switch ( mode ) { + switch ( mode ) + { + case read: + access = GENERIC_READ; + shareMode = FILE_SHARE_READ|FILE_SHARE_WRITE; + disposition = OPEN_EXISTING; + break; + + case write_append: + if ( wxFile::Exists(szFileName) ) + { + access = GENERIC_READ|GENERIC_WRITE; + shareMode = FILE_SHARE_READ; + disposition = 0; + break; + } + //else: fall through as write_append is the same as write if the + // file doesn't exist + + case write: + access = GENERIC_WRITE; + shareMode = 0; + disposition = TRUNCATE_EXISTING; + break; + + case write_excl: + access = GENERIC_WRITE; + shareMode = 0; + disposition = TRUNCATE_EXISTING; + break; + + case read_write: + access = GENERIC_READ|GENERIC_WRITE; + shareMode = 0; + disposition = 0; + break; + } + + int fd = 0; + HANDLE fileHandle = ::CreateFile(szFileName, access, shareMode, NULL, + disposition, FILE_ATTRIBUTE_NORMAL, 0); + if (fileHandle == INVALID_HANDLE_VALUE) + fd = -1; + else + fd = (int) fileHandle; +#else + int flags = O_BINARY; + + switch ( mode ) + { case read: flags |= O_RDONLY; break; + case write_append: + if ( wxFile::Exists(szFileName) ) + { + flags |= O_WRONLY | O_APPEND; + break; + } + //else: fall through as write_append is the same as write if the + // file doesn't exist + case write: flags |= O_WRONLY | O_CREAT | O_TRUNC; break; - case write_append: - flags |= O_WRONLY | O_APPEND; + case write_excl: + flags |= O_WRONLY | O_CREAT | O_EXCL; break; case read_write: @@ -253,9 +339,10 @@ bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) break; } - int fd = open(wxFNCONV(szFileName), flags ACCESS(accessMode)); - - if ( fd == -1 ) { + int fd = wxOpen( szFileName, flags ACCESS(accessMode)); +#endif + if ( fd == -1 ) + { wxLogSysError(_("can't open file '%s'"), szFileName); return FALSE; } @@ -269,7 +356,12 @@ bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode) bool wxFile::Close() { if ( IsOpened() ) { - if ( close(m_fd) == -1 ) { +#ifdef __WXWINCE__ + if (!CloseHandle((HANDLE) m_fd)) +#else + if ( close(m_fd) == -1 ) +#endif + { wxLogSysError(_("can't close file descriptor %d"), m_fd); m_fd = fd_invalid; return FALSE; @@ -290,7 +382,14 @@ off_t wxFile::Read(void *pBuf, off_t nCount) { wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); -#ifdef __MWERKS__ +#ifdef __WXWINCE__ + DWORD bytesRead = 0; + int iRc = 0; + if (ReadFile((HANDLE) m_fd, pBuf, (DWORD) nCount, & bytesRead, NULL)) + iRc = bytesRead; + else + iRc = -1; +#elif defined(__MWERKS__) int iRc = ::read(m_fd, (char*) pBuf, nCount); #else int iRc = ::read(m_fd, pBuf, nCount); @@ -308,8 +407,19 @@ size_t wxFile::Write(const void *pBuf, size_t nCount) { wxCHECK( (pBuf != NULL) && IsOpened(), 0 ); -#ifdef __MWERKS__ +#ifdef __WXWINCE__ + DWORD bytesRead = 0; + int iRc = 0; + if (WriteFile((HANDLE) m_fd, pBuf, (DWORD) nCount, & bytesRead, NULL)) + iRc = bytesRead; + else + iRc = -1; +#elif defined(__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 @@ -326,8 +436,10 @@ size_t wxFile::Write(const void *pBuf, size_t nCount) bool wxFile::Flush() { if ( IsOpened() ) { -#if defined(__VISUALC__) || wxHAVE_FSYNC - if ( fsync(m_fd) == -1 ) +#ifdef __WXWINCE__ + // Do nothing +#elif defined(__VISUALC__) || wxHAVE_FSYNC + if ( wxFsync(m_fd) == -1 ) { wxLogSysError(_("can't flush file descriptor %d"), m_fd); return FALSE; @@ -349,6 +461,34 @@ off_t wxFile::Seek(off_t ofs, wxSeekMode mode) { wxASSERT( IsOpened() ); +#ifdef __WXWINCE__ + int origin; + switch ( mode ) { + default: + wxFAIL_MSG(_("unknown seek origin")); + + case wxFromStart: + origin = FILE_BEGIN; + break; + + case wxFromCurrent: + origin = FILE_CURRENT; + break; + + case wxFromEnd: + origin = FILE_END; + break; + } + + DWORD res = SetFilePointer((HANDLE) m_fd, ofs, 0, origin) ; + if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR) + { + wxLogSysError(_("can't seek on file descriptor %d"), m_fd); + return wxInvalidOffset; + } + else + return (off_t)res; +#else int origin; switch ( mode ) { default: @@ -374,6 +514,7 @@ off_t wxFile::Seek(off_t ofs, wxSeekMode mode) } else return (off_t)iRc; +#endif } // get current off_t @@ -381,13 +522,24 @@ off_t wxFile::Tell() const { wxASSERT( IsOpened() ); - int iRc = tell(m_fd); +#ifdef __WXWINCE__ + DWORD res = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT) ; + if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR) + { + wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd); + return wxInvalidOffset; + } + else + return (off_t)res; +#else + int iRc = wxTell(m_fd); if ( iRc == -1 ) { wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd); return wxInvalidOffset; } else return (off_t)iRc; +#endif } // get current file length @@ -395,10 +547,19 @@ off_t wxFile::Length() const { wxASSERT( IsOpened() ); +#ifdef __WXWINCE__ + DWORD off0 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT); + DWORD off1 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_END); + off_t len = off1; + + // Restore position + SetFilePointer((HANDLE) m_fd, off0, 0, FILE_BEGIN); + return len; +#else #ifdef __VISUALC__ int iRc = _filelength(m_fd); #else // !VC++ - int iRc = tell(m_fd); + int iRc = wxTell(m_fd); if ( iRc != -1 ) { // @ have to use const_cast :-( int iLen = ((wxFile *)this)->SeekEnd(); @@ -420,6 +581,7 @@ off_t wxFile::Length() const } else return (off_t)iRc; +#endif } // is end of file reached? @@ -427,9 +589,20 @@ bool wxFile::Eof() const { wxASSERT( IsOpened() ); +#ifdef __WXWINCE__ + DWORD off0 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_CURRENT); + DWORD off1 = SetFilePointer((HANDLE) m_fd, 0, 0, FILE_END); + if (off0 == off1) + return TRUE; + else + { + SetFilePointer((HANDLE) m_fd, off0, 0, FILE_BEGIN); + return FALSE; + } +#else int 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(), ofsMax = Length(); @@ -449,8 +622,7 @@ bool wxFile::Eof() const return FALSE; case -1: - wxLogSysError(_("can't determine if the end of file is reached on \ - descriptor %d"), m_fd); + wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd); break; default: @@ -458,6 +630,7 @@ bool wxFile::Eof() const } return TRUE; +#endif } // ============================================================================ @@ -467,6 +640,7 @@ bool wxFile::Eof() const // ---------------------------------------------------------------------------- // construction // ---------------------------------------------------------------------------- + wxTempFile::wxTempFile(const wxString& strName) { Open(strName); @@ -474,78 +648,54 @@ 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; - mkdir(m_strTemp.GetWriteBuf(MAX_PATH)); -#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); + } - 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; + m_strName = fn.GetFullPath(); + + m_strTemp = wxFileName::CreateTempFileName(m_strName, &m_file); + + if ( m_strTemp.empty() ) + { + // CreateTempFileName() failed + return FALSE; + } - struct stat st; - if ( stat(strName.fn_str(), &st) == 0 ) +#ifdef __UNIX__ + // the temp file should have the same permissions as the original one + mode_t mode; + + wxStructStat st; + 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); + wxLogSysError(_("Failed to set temporary file permissions")); } #endif // Unix - return ok; + return TRUE; } // ---------------------------------------------------------------------------- @@ -562,12 +712,12 @@ bool wxTempFile::Commit() { m_file.Close(); - if ( wxFile::Exists(m_strName) && remove(m_strName.fn_str()) != 0 ) { + if ( wxFile::Exists(m_strName) && wxRemove(m_strName) != 0 ) { wxLogSysError(_("can't remove file '%s'"), m_strName.c_str()); return FALSE; } - if ( rename(m_strTemp.fn_str(), m_strName.fn_str()) != 0 ) { + if ( !wxRenameFile(m_strTemp, m_strName) ) { wxLogSysError(_("can't commit changes to file '%s'"), m_strName.c_str()); return FALSE; } @@ -578,9 +728,9 @@ bool wxTempFile::Commit() void wxTempFile::Discard() { m_file.Close(); - if ( remove(m_strTemp.fn_str()) != 0 ) + if ( wxRemove(m_strTemp) != 0 ) wxLogSysError(_("can't remove temporary file '%s'"), m_strTemp.c_str()); } -#endif +#endif // wxUSE_FILE