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Diffstat (limited to 'trunk/qtools/qfile_unix.cpp')
| -rw-r--r-- | trunk/qtools/qfile_unix.cpp | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/trunk/qtools/qfile_unix.cpp b/trunk/qtools/qfile_unix.cpp deleted file mode 100644 index fa53d13..0000000 --- a/trunk/qtools/qfile_unix.cpp +++ /dev/null @@ -1,668 +0,0 @@ -/**************************************************************************** -** -** -** Implementation of QFileInfo class -** -** Created : 950628 -** -** Copyright (C) 1992-2000 Trolltech AS. All rights reserved. -** -** This file is part of the tools module of the Qt GUI Toolkit. -** -** This file may be distributed under the terms of the Q Public License -** as defined by Trolltech AS of Norway and appearing in the file -** LICENSE.QPL included in the packaging of this file. -** -** This file may be distributed and/or modified under the terms of the -** GNU General Public License version 2 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. -** -** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition -** licenses for Unix/X11 or for Qt/Embedded may use this file in accordance -** with the Qt Commercial License Agreement provided with the Software. -** -** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE -** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. -** -** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for -** information about Qt Commercial License Agreements. -** See http://www.trolltech.com/qpl/ for QPL licensing information. -** See http://www.trolltech.com/gpl/ for GPL licensing information. -** -** Contact info@trolltech.com if any conditions of this licensing are -** not clear to you. -** -**********************************************************************/ - -#include "qglobal.h" - -#include "qfile.h" -#include "qfiledefs_p.h" - -#if (defined(_OS_MAC_) && (!defined(_OS_UNIX_))) || defined(_OS_MSDOS_) || defined(_OS_WIN32_) || defined(_OS_OS2_) || defined(_OS_CYGWIN_) -# define HAS_TEXT_FILEMODE // has translate/text filemode -#endif -#if defined(O_NONBLOCK) -# define HAS_ASYNC_FILEMODE -# define OPEN_ASYNC O_NONBLOCK -#elif defined(O_NDELAY) -# define HAS_ASYNC_FILEMODE -# define OPEN_ASYNC O_NDELAY -#endif - -bool qt_file_access( const QString& fn, int t ) -{ - if ( fn.isEmpty() ) - return FALSE; - return ACCESS( QFile::encodeName(fn), t ) == 0; -} - -/*! - Removes the file \a fileName. - Returns TRUE if successful, otherwise FALSE. -*/ - -bool QFile::remove( const QString &fileName ) -{ - if ( fileName.isEmpty() ) { -#if defined(CHECK_NULL) - qWarning( "QFile::remove: Empty or null file name" ); -#endif - return FALSE; - } - return unlink( QFile::encodeName(fileName) ) == 0; - // unlink more common in UNIX -} - -#if defined(O_NONBLOCK) -# define HAS_ASYNC_FILEMODE -# define OPEN_ASYNC O_NONBLOCK -#elif defined(O_NDELAY) -# define HAS_ASYNC_FILEMODE -# define OPEN_ASYNC O_NDELAY -#endif - -/*! - Opens the file specified by the file name currently set, using the mode \e m. - Returns TRUE if successful, otherwise FALSE. - - The mode parameter \e m must be a combination of the following flags: - <ul> - <li>\c IO_Raw specified raw (non-buffered) file access. - <li>\c IO_ReadOnly opens the file in read-only mode. - <li>\c IO_WriteOnly opens the file in write-only mode (and truncates). - <li>\c IO_ReadWrite opens the file in read/write mode, equivalent to - \c (IO_ReadOnly|IO_WriteOnly). - <li>\c IO_Append opens the file in append mode. This mode is very useful - when you want to write something to a log file. The file index is set to - the end of the file. Note that the result is undefined if you position the - file index manually using at() in append mode. - <li>\c IO_Truncate truncates the file. - <li>\c IO_Translate enables carriage returns and linefeed translation - for text files under MS-DOS, Windows and OS/2. - </ul> - - The raw access mode is best when I/O is block-operated using 4kB block size - or greater. Buffered access works better when reading small portions of - data at a time. - - <strong>Important:</strong> When working with buffered files, data may - not be written to the file at once. Call \link flush() flush\endlink - to make sure the data is really written. - - \warning We have experienced problems with some C libraries when a buffered - file is opened for both reading and writing. If a read operation takes place - immediately after a write operation, the read buffer contains garbage data. - Worse, the same garbage is written to the file. Calling flush() before - readBlock() solved this problem. - - If the file does not exist and \c IO_WriteOnly or \c IO_ReadWrite is - specified, it is created. - - Example: - \code - QFile f1( "/tmp/data.bin" ); - QFile f2( "readme.txt" ); - f1.open( IO_Raw | IO_ReadWrite | IO_Append ); - f2.open( IO_ReadOnly | IO_Translate ); - \endcode - - \sa name(), close(), isOpen(), flush() -*/ - -bool QFile::open( int m ) -{ - if ( isOpen() ) { // file already open -#if defined(CHECK_STATE) - qWarning( "QFile::open: File already open" ); -#endif - return FALSE; - } - if ( fn.isNull() ) { // no file name defined -#if defined(CHECK_NULL) - qWarning( "QFile::open: No file name specified" ); -#endif - return FALSE; - } - init(); // reset params - setMode( m ); - if ( !(isReadable() || isWritable()) ) { -#if defined(CHECK_RANGE) - qWarning( "QFile::open: File access not specified" ); -#endif - return FALSE; - } - bool ok = TRUE; - STATBUF st; - if ( isRaw() ) { // raw file I/O - int oflags = OPEN_RDONLY; - if ( isReadable() && isWritable() ) - oflags = OPEN_RDWR; - else if ( isWritable() ) - oflags = OPEN_WRONLY; - if ( flags() & IO_Append ) { // append to end of file? - if ( flags() & IO_Truncate ) - oflags |= (OPEN_CREAT | OPEN_TRUNC); - else - oflags |= (OPEN_APPEND | OPEN_CREAT); - setFlags( flags() | IO_WriteOnly ); // append implies write - } else if ( isWritable() ) { // create/trunc if writable - if ( flags() & IO_Truncate ) - oflags |= (OPEN_CREAT | OPEN_TRUNC); - else - oflags |= OPEN_CREAT; - } -#if defined(HAS_TEXT_FILEMODE) - if ( isTranslated() ) -#ifdef __CYGWIN__ - /* Do nothing, allowing the Cygwin mount mode to take effect. */; -#else - oflags |= OPEN_TEXT; -#endif - else - oflags |= OPEN_BINARY; -#endif -#if defined(HAS_ASYNC_FILEMODE) - if ( isAsynchronous() ) - oflags |= OPEN_ASYNC; -#endif - fd = OPEN( QFile::encodeName(fn), oflags, 0666 ); - - if ( fd != -1 ) { // open successful - FSTAT( fd, &st ); // get the stat for later usage - } else { - ok = FALSE; - } - } else { // buffered file I/O - QCString perm; - char perm2[4]; - bool try_create = FALSE; - if ( flags() & IO_Append ) { // append to end of file? - setFlags( flags() | IO_WriteOnly ); // append implies write - perm = isReadable() ? "a+" : "a"; - } else { - if ( isReadWrite() ) { - if ( flags() & IO_Truncate ) { - perm = "w+"; - } else { - perm = "r+"; - try_create = TRUE; // try to create if not exists - } - } else if ( isReadable() ) { - perm = "r"; - } else if ( isWritable() ) { - perm = "w"; - } - } - qstrcpy( perm2, perm ); -#if defined(HAS_TEXT_FILEMODE) - if ( isTranslated() ) -#ifdef __CYGWIN__ - /* Do nothing, allowing the Cygwin mount mode to take effect. */; -#else - strcat( perm2, "t" ); -#endif - else - strcat( perm2, "b" ); -#endif - while (1) { // At most twice - - fh = fopen( QFile::encodeName(fn), perm2 ); - - if ( !fh && try_create ) { - perm2[0] = 'w'; // try "w+" instead of "r+" - try_create = FALSE; - } else { - break; - } - } - if ( fh ) { - FSTAT( FILENO(fh), &st ); // get the stat for later usage - } else { - ok = FALSE; - } - } - if ( ok ) { - setState( IO_Open ); - // on successful open the file stat was got; now test what type - // of file we have - if ( (st.st_mode & STAT_MASK) != STAT_REG ) { - // non-seekable - setType( IO_Sequential ); - length = INT_MAX; - ioIndex = (flags() & IO_Append) == 0 ? 0 : length; - } else { - length = (int)st.st_size; - ioIndex = (flags() & IO_Append) == 0 ? 0 : length; - if ( !(flags()&IO_Truncate) && length == 0 && isReadable() ) { - // try if you can read from it (if you can, it's a sequential - // device; e.g. a file in the /proc filesystem) - int c = getch(); - if ( c != -1 ) { - ungetch(c); - setType( IO_Sequential ); - length = INT_MAX; - } - } - } - } else { - init(); - if ( errno == EMFILE ) // no more file handles/descrs - setStatus( IO_ResourceError ); - else - setStatus( IO_OpenError ); - } - return ok; -} - -/*! - Opens a file in the mode \e m using an existing file handle \e f. - Returns TRUE if successful, otherwise FALSE. - - Example: - \code - #include <stdio.h> - - void printError( const char* msg ) - { - QFile f; - f.open( IO_WriteOnly, stderr ); - f.writeBlock( msg, qstrlen(msg) ); // write to stderr - f.close(); - } - \endcode - - When a QFile is opened using this function, close() does not actually - close the file, only flushes it. - - \warning If \e f is \c stdin, \c stdout, \c stderr, you may not - be able to seek. See QIODevice::isSequentialAccess() for more - information. - - \sa close() -*/ - -bool QFile::open( int m, FILE *f ) -{ - if ( isOpen() ) { -#if defined(CHECK_RANGE) - qWarning( "QFile::open: File already open" ); -#endif - return FALSE; - } - init(); - setMode( m &~IO_Raw ); - setState( IO_Open ); - fh = f; - ext_f = TRUE; - STATBUF st; - FSTAT( FILENO(fh), &st ); - ioIndex = (int)ftell( fh ); - if ( (st.st_mode & STAT_MASK) != STAT_REG || f == stdin ) { //stdin is non seekable - // non-seekable - setType( IO_Sequential ); - length = INT_MAX; - } else { - length = (int)st.st_size; - if ( !(flags()&IO_Truncate) && length == 0 && isReadable() ) { - // try if you can read from it (if you can, it's a sequential - // device; e.g. a file in the /proc filesystem) - int c = getch(); - if ( c != -1 ) { - ungetch(c); - setType( IO_Sequential ); - length = INT_MAX; - } - } - } - return TRUE; -} - -/*! - Opens a file in the mode \e m using an existing file descriptor \e f. - Returns TRUE if successful, otherwise FALSE. - - When a QFile is opened using this function, close() does not actually - close the file. - - \warning If \e f is one of 0 (stdin), 1 (stdout) or 2 (stderr), you may not - be able to seek. size() is set to \c INT_MAX (in limits.h). - - \sa close() -*/ - - -bool QFile::open( int m, int f ) -{ - if ( isOpen() ) { -#if defined(CHECK_RANGE) - qWarning( "QFile::open: File already open" ); -#endif - return FALSE; - } - init(); - setMode( m |IO_Raw ); - setState( IO_Open ); - fd = f; - ext_f = TRUE; - STATBUF st; - FSTAT( fd, &st ); - ioIndex = (int)LSEEK(fd, 0, SEEK_CUR); - if ( (st.st_mode & STAT_MASK) != STAT_REG || f == 0 ) { // stdin is not seekable... - // non-seekable - setType( IO_Sequential ); - length = INT_MAX; - } else { - length = (int)st.st_size; - if ( length == 0 && isReadable() ) { - // try if you can read from it (if you can, it's a sequential - // device; e.g. a file in the /proc filesystem) - int c = getch(); - if ( c != -1 ) { - ungetch(c); - setType( IO_Sequential ); - length = INT_MAX; - } - resetStatus(); - } - } - return TRUE; -} - -/*! - Returns the file size. - \sa at() -*/ - -uint QFile::size() const -{ - STATBUF st; - if ( isOpen() ) { - FSTAT( fh ? FILENO(fh) : fd, &st ); - } else { - STAT( QFile::encodeName(fn), &st ); - } - return st.st_size; -} - -/*! - \fn int QFile::at() const - Returns the file index. - \sa size() -*/ - -/*! - Sets the file index to \e pos. Returns TRUE if successful, otherwise FALSE. - - Example: - \code - QFile f( "data.bin" ); - f.open( IO_ReadOnly ); // index set to 0 - f.at( 100 ); // set index to 100 - f.at( f.at()+50 ); // set index to 150 - f.at( f.size()-80 ); // set index to 80 before EOF - f.close(); - \endcode - - \warning The result is undefined if the file was \link open() opened\endlink - using the \c IO_Append specifier. - - \sa size(), open() -*/ - -bool QFile::at( int pos ) -{ - if ( !isOpen() ) { -#if defined(CHECK_STATE) - qWarning( "QFile::at: File is not open" ); -#endif - return FALSE; - } - bool ok; - if ( isRaw() ) { // raw file - pos = (int)LSEEK(fd, pos, SEEK_SET); - ok = pos != -1; - } else { // buffered file - ok = fseek(fh, pos, SEEK_SET) == 0; - } - if ( ok ) - ioIndex = pos; -#if defined(CHECK_RANGE) - else - qWarning( "QFile::at: Cannot set file position %d", pos ); -#endif - return ok; -} - -/*! - Reads at most \e len bytes from the file into \e p and returns the - number of bytes actually read. - - Returns -1 if a serious error occurred. - - \warning We have experienced problems with some C libraries when a buffered - file is opened for both reading and writing. If a read operation takes place - immediately after a write operation, the read buffer contains garbage data. - Worse, the same garbage is written to the file. Calling flush() before - readBlock() solved this problem. - - \sa writeBlock() -*/ - -int QFile::readBlock( char *p, uint len ) -{ -#if defined(CHECK_NULL) - if ( !p ) - qWarning( "QFile::readBlock: Null pointer error" ); -#endif -#if defined(CHECK_STATE) - if ( !isOpen() ) { // file not open - qWarning( "QFile::readBlock: File not open" ); - return -1; - } - if ( !isReadable() ) { // reading not permitted - qWarning( "QFile::readBlock: Read operation not permitted" ); - return -1; - } -#endif - int nread = 0; // number of bytes read - if ( !ungetchBuffer.isEmpty() ) { - // need to add these to the returned string. - int l = ungetchBuffer.length(); - while( nread < l ) { - *p = ungetchBuffer[ l - nread - 1 ]; - p++; - nread++; - } - ungetchBuffer.truncate( l - nread ); - } - - if ( nread < (int)len ) { - if ( isRaw() ) { // raw file - nread += READ( fd, p, len-nread ); - if ( len && nread <= 0 ) { - nread = 0; - setStatus(IO_ReadError); - } - } else { // buffered file - nread += fread( p, 1, len-nread, fh ); - if ( (uint)nread != len ) { - if ( ferror( fh ) || nread==0 ) - setStatus(IO_ReadError); - } - } - } - ioIndex += nread; - return nread; -} - -/*! \overload int writeBlock( const QByteArray& data ) -*/ - -/*! \reimp - - Writes \e len bytes from \e p to the file and returns the number of - bytes actually written. - - Returns -1 if a serious error occurred. - - \warning When working with buffered files, data may not be written - to the file at once. Call flush() to make sure the data is really - written. - - \sa readBlock() -*/ - -int QFile::writeBlock( const char *p, uint len ) -{ -#if defined(CHECK_NULL) - if ( p == 0 && len != 0 ) - qWarning( "QFile::writeBlock: Null pointer error" ); -#endif -#if defined(CHECK_STATE) - if ( !isOpen() ) { // file not open - qWarning( "QFile::writeBlock: File not open" ); - return -1; - } - if ( !isWritable() ) { // writing not permitted - qWarning( "QFile::writeBlock: Write operation not permitted" ); - return -1; - } -#endif - int nwritten; // number of bytes written - if ( isRaw() ) // raw file - nwritten = WRITE( fd, p, len ); - else // buffered file - nwritten = fwrite( p, 1, len, fh ); - if ( nwritten != (int)len ) { // write error - if ( errno == ENOSPC ) // disk is full - setStatus( IO_ResourceError ); - else - setStatus( IO_WriteError ); - if ( isRaw() ) // recalc file position - ioIndex = (int)LSEEK( fd, 0, SEEK_CUR ); - else - ioIndex = fseek( fh, 0, SEEK_CUR ); - } else { - ioIndex += nwritten; - } - if ( ioIndex > length ) // update file length - length = ioIndex; - return nwritten; -} - -/*! - Returns the file handle of the file. - - This is a small positive integer, suitable for use with C library - functions such as fdopen() and fcntl(), as well as with QSocketNotifier. - - If the file is not open or there is an error, handle() returns -1. - - \sa QSocketNotifier -*/ - -int QFile::handle() const -{ - if ( !isOpen() ) - return -1; - else if ( fh ) - return FILENO( fh ); - else - return fd; -} - -/*! - Closes an open file. - - The file is not closed if it was opened with an existing file handle. - If the existing file handle is a \c FILE*, the file is flushed. - If the existing file handle is an \c int file descriptor, nothing - is done to the file. - - Some "write-behind" filesystems may report an unspecified error on - closing the file. These errors only indicate that something may - have gone wrong since the previous open(). In such a case status() - reports IO_UnspecifiedError after close(), otherwise IO_Ok. - - \sa open(), flush() -*/ - - -void QFile::close() -{ - bool ok = FALSE; - if ( isOpen() ) { // file is not open - if ( fh ) { // buffered file - if ( ext_f ) - ok = fflush( fh ) != -1; // flush instead of closing - else - ok = fclose( fh ) != -1; - } else { // raw file - if ( ext_f ) - ok = TRUE; // cannot close - else - ok = CLOSE( fd ) != -1; - } - init(); // restore internal state - } - if (!ok) - setStatus (IO_UnspecifiedError); - - return; -} - -int64 QFile::pos() const -{ - if (isOpen()) - { - // TODO: support 64 bit size - return ftell( fh ); - } - return -1; -} - -int64 QFile::toEnd() -{ - if (isOpen()) - { - // TODO: support 64 bit size - if (fseek( fh, 0, SEEK_END )!=-1) - { - return ftell( fh ); - } - } - return -1; -} - -bool QFile::seek( int64 pos ) -{ - if (isOpen()) - { - // TODO: support 64 bit size - return fseek( fh, pos, SEEK_SET )!=-1; - } - return FALSE; -} - |