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path: root/qmake/tools/qfile_unix.cpp
authorllornkcor <llornkcor>2003-07-10 02:40:10 (UTC)
committer llornkcor <llornkcor>2003-07-10 02:40:10 (UTC)
commit155d68c1e7d7dc0fed2534ac43d6d77ce2781f55 (patch) (side-by-side diff)
treee6edaa5a7040fe6c224c3943d1094dcf02e4f74c /qmake/tools/qfile_unix.cpp
parent86703e8a5527ef114facd02c005b6b3a7e62e263 (diff)
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update qmake to 1.05a
Diffstat (limited to 'qmake/tools/qfile_unix.cpp') (more/less context) (ignore whitespace changes)
-rw-r--r--qmake/tools/qfile_unix.cpp13
1 files changed, 9 insertions, 4 deletions
diff --git a/qmake/tools/qfile_unix.cpp b/qmake/tools/qfile_unix.cpp
index 2d5a856..460bf06 100644
--- a/qmake/tools/qfile_unix.cpp
+++ b/qmake/tools/qfile_unix.cpp
@@ -406,69 +406,72 @@ bool QFile::open( int m, int f )
ioIndex = (Offset)::lseek(fd, 0, SEEK_CUR);
if ( (st.st_mode & S_IFMT) != S_IFREG || f == 0 ) { // stdin is not seekable...
// non-seekable
setType( IO_Sequential );
length = INT_MAX;
ioIndex = 0;
} else {
length = (Offset)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;
ioIndex = 0;
}
resetStatus();
}
}
return TRUE;
}
/*!
Returns the file size.
\sa at()
*/
QIODevice::Offset QFile::size() const
{
struct stat st;
+ int ret = 0;
if ( isOpen() ) {
- ::fstat( fh ? fileno(fh) : fd, &st );
+ ret = ::fstat( fh ? fileno(fh) : fd, &st );
} else {
- ::stat( QFile::encodeName(fn), &st );
+ ret = ::stat( QFile::encodeName(fn), &st );
}
+ if ( ret == -1 )
+ return 0;
#if defined(QT_LARGEFILE_SUPPORT) && !defined(QT_ABI_64BITOFFSET)
return (uint)st.st_size > UINT_MAX ? UINT_MAX : (QIODevice::Offset)st.st_size;
#else
return st.st_size;
#endif
}
/*!
\overload
Sets the file index to \a pos. Returns TRUE if successful;
otherwise returns 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
Use \c at() without arguments to retrieve the file offset.
\warning The result is undefined if the file was open()'ed using
the \c IO_Append specifier.
\sa size(), open()
*/
@@ -509,65 +512,65 @@ bool QFile::at( Offset pos )
/*!
\reimp
\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.
*/
Q_LONG QFile::readBlock( char *p, Q_ULONG len )
{
#if defined(QT_CHECK_NULL)
if ( !p )
qWarning( "QFile::readBlock: Null pointer error" );
#endif
#if defined(QT_CHECK_STATE)
if ( !isOpen() ) {
qWarning( "QFile::readBlock: File not open" );
return -1;
}
if ( !isReadable() ) {
qWarning( "QFile::readBlock: Read operation not permitted" );
return -1;
}
#endif
Q_ULONG nread = 0; // number of bytes read
if ( !ungetchBuffer.isEmpty() ) {
// need to add these to the returned string.
uint l = ungetchBuffer.length();
while( nread < l ) {
- *p = ungetchBuffer[ l - nread - 1 ];
+ *p = ungetchBuffer.at( l - nread - 1 );
p++;
nread++;
}
ungetchBuffer.truncate( l - nread );
}
if ( nread < 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);
}
}
}
if ( !isSequentialAccess() )
ioIndex += nread;
return nread;
}
/*! \reimp
Writes \a len bytes from \a p to the file and returns the number of
bytes actually written.
@@ -600,65 +603,67 @@ Q_LONG QFile::writeBlock( const char *p, Q_ULONG len )
if ( isRaw() ) // raw file
nwritten = ::write( fd, (void *)p, len );
else // buffered file
nwritten = fwrite( p, 1, len, fh );
if ( nwritten != len ) { // write error
if ( errno == ENOSPC ) // disk is full
setStatus( IO_ResourceError );
else
setStatus( IO_WriteError );
if ( !isSequentialAccess() ) {
if ( isRaw() ) // recalc file position
ioIndex = (Offset)::lseek( fd, 0, SEEK_CUR );
else
#if defined(QT_LARGEFILE_SUPPORT)
ioIndex = (Offset)::fseeko( fh, 0, SEEK_CUR );
#else
ioIndex = (Offset)::fseek( fh, 0, SEEK_CUR );
#endif
}
} else {
if ( !isSequentialAccess() )
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.
+ functions such as fdopen() and fcntl(). On systems that use file
+ descriptors for sockets (ie. Unix systems, but not Windows) the handle
+ can be used with QSocketNotifier as well.
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()
*/