Branch data     Line data    Source code

       1                 :            : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 :            : /*
       3                 :            :  * Version: MPL 1.1 / GPLv3+ / LGPLv3+
       4                 :            :  *
       5                 :            :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :            :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :            :  * the License or as specified alternatively below. You may obtain a copy of
       8                 :            :  * the License at http://www.mozilla.org/MPL/
       9                 :            :  *
      10                 :            :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :            :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :            :  * for the specific language governing rights and limitations under the
      13                 :            :  * License.
      14                 :            :  *
      15                 :            :  * The Initial Developer of the Original Code is
      16                 :            :  *       Julien Chaffraix <julien.chaffraix@gmail.com>
      17                 :            :  * Portions created by the Initial Developer are Copyright (C) 2011 the
      18                 :            :  * Initial Developer. All Rights Reserved.
      19                 :            :  *
      20                 :            :  * Major Contributor(s):
      21                 :            :  *
      22                 :            :  * For minor contributions see the git repository.
      23                 :            :  *
      24                 :            :  * Alternatively, the contents of this file may be used under the terms of
      25                 :            :  * either the GNU General Public License Version 3 or later (the "GPLv3+"), or
      26                 :            :  * the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
      27                 :            :  * in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
      28                 :            :  * instead of those above.
      29                 :            :  */
      30                 :            : 
      31                 :            : #include "readwrite_helper.h"
      32                 :            : 
      33                 :            : #include <osl/diagnose.h>
      34                 :            : #include <system.h>
      35                 :            : 
      36                 :       5851 : sal_Bool safeWrite(int fd, void* data, sal_uInt32 dataSize)
      37                 :            : {
      38                 :       5851 :     sal_Int32 nToWrite = dataSize;
      39                 :       5851 :     unsigned char* dataToWrite = data;
      40                 :            : 
      41                 :            :     // Check for overflow as we convert a signed to an unsigned.
      42                 :            :     OSL_ASSERT(dataSize == (sal_uInt32)nToWrite);
      43         [ +  + ]:      11702 :     while ( nToWrite ) {
      44                 :       5851 :         sal_Int32 nWritten = write(fd, dataToWrite, nToWrite);
      45         [ -  + ]:       5851 :         if ( nWritten < 0 ) {
      46         [ #  # ]:          0 :             if ( errno == EINTR )
      47                 :          0 :                 continue;
      48                 :            : 
      49                 :          0 :             return sal_False;
      50                 :            : 
      51                 :            :         }
      52                 :            : 
      53                 :            :         OSL_ASSERT(nWritten > 0);
      54                 :       5851 :         nToWrite -= nWritten;
      55                 :       5851 :         dataToWrite += nWritten;
      56                 :            :     }
      57                 :            : 
      58                 :       5851 :     return sal_True;
      59                 :            : }
      60                 :            : 
      61                 :          0 : sal_Bool safeRead( int fd, void* buffer, sal_uInt32 count )
      62                 :            : {
      63                 :          0 :     sal_Int32 nToRead = count;
      64                 :          0 :     unsigned char* bufferForReading = buffer;
      65                 :            : 
      66                 :            :     // Check for overflow as we convert a signed to an unsigned.
      67                 :            :     OSL_ASSERT(count == (sal_uInt32)nToRead);
      68         [ #  # ]:          0 :     while ( nToRead ) {
      69                 :          0 :         sal_Int32 nRead = read(fd, bufferForReading, nToRead);
      70         [ #  # ]:          0 :         if ( nRead < 0 ) {
      71                 :            :             // We were interrupted before reading, retry.
      72         [ #  # ]:          0 :             if (errno == EINTR)
      73                 :          0 :                 continue;
      74                 :            : 
      75                 :          0 :             return sal_False;
      76                 :            :         }
      77                 :            : 
      78                 :            :         // If we reach the EOF, we consider this a partial transfer and thus
      79                 :            :         // an error.
      80         [ #  # ]:          0 :         if ( nRead == 0 )
      81                 :          0 :             return sal_False;
      82                 :            : 
      83                 :          0 :         nToRead -= nRead;
      84                 :          0 :         bufferForReading += nRead;
      85                 :            :     }
      86                 :            : 
      87                 :          0 :     return sal_True;
      88                 :            : }
      89                 :            : 
      90                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */