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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Version: MPL 1.1 / GPLv3+ / LGPLv3+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Initial Developer of the Original Code is
* Julien Chaffraix <julien.chaffraix@gmail.com>
* Portions created by the Initial Developer are Copyright (C) 2011 the
* Initial Developer. All Rights Reserved.
*
* Major Contributor(s):
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
* in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
* instead of those above.
*/
#include "readwrite_helper.h"
#include <osl/diagnose.h>
#include <system.h>
sal_Bool safeWrite(int fd, void* data, sal_uInt32 dataSize)
{
sal_Int32 nToWrite = dataSize;
unsigned char* dataToWrite = data;
// Check for overflow as we convert a signed to an unsigned.
OSL_ASSERT(dataSize == (sal_uInt32)nToWrite);
while ( nToWrite ) {
sal_Int32 nWritten = write(fd, dataToWrite, nToWrite);
if ( nWritten < 0 ) {
if ( errno == EINTR )
continue;
return sal_False;
}
OSL_ASSERT(nWritten > 0);
nToWrite -= nWritten;
dataToWrite += nWritten;
}
return sal_True;
}
sal_Bool safeRead( int fd, void* buffer, sal_uInt32 count )
{
sal_Int32 nToRead = count;
unsigned char* bufferForReading = buffer;
// Check for overflow as we convert a signed to an unsigned.
OSL_ASSERT(count == (sal_uInt32)nToRead);
while ( nToRead ) {
sal_Int32 nRead = read(fd, bufferForReading, nToRead);
if ( nRead < 0 ) {
// We were interrupted before reading, retry.
if (errno == EINTR)
continue;
return sal_False;
}
// If we reach the EOF, we consider this a partial transfer and thus
// an error.
if ( nRead == 0 )
return sal_False;
nToRead -= nRead;
bufferForReading += nRead;
}
return sal_True;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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