mirror of
https://github.com/reactos/reactos.git
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91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
/*
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* Copyright (C) 2005 Casper S. Hornstrup
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "pch.h"
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#include <assert.h>
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#include "rbuild.h"
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using std::string;
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/* static */ void
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FileSupportCode::WriteIfChanged ( char* outbuf,
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const string& filename,
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bool ignoreError )
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{
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FILE* out;
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unsigned int end;
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char* cmpbuf;
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unsigned int stat;
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out = fopen ( filename.c_str (), "rb" );
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if ( out == NULL )
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{
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out = fopen ( filename.c_str (), "wb" );
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if ( out == NULL )
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{
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if ( ignoreError )
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return;
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throw AccessDeniedException ( filename );
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}
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fputs ( outbuf, out );
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fclose ( out );
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return;
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}
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fseek ( out, 0, SEEK_END );
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end = ftell ( out );
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cmpbuf = (char*) malloc ( end );
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if ( cmpbuf == NULL )
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{
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fclose ( out );
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throw OutOfMemoryException ();
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}
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fseek ( out, 0, SEEK_SET );
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stat = fread ( cmpbuf, 1, end, out );
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if ( stat != end )
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{
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free ( cmpbuf );
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fclose ( out );
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throw AccessDeniedException ( filename );
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}
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if ( end == strlen ( outbuf ) && memcmp ( cmpbuf, outbuf, end ) == 0 )
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{
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free ( cmpbuf );
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fclose ( out );
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return;
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}
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free ( cmpbuf );
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fclose ( out );
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out = fopen ( filename.c_str (), "wb" );
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if ( out == NULL )
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{
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throw AccessDeniedException ( filename );
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}
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stat = fwrite ( outbuf, 1, strlen ( outbuf ), out);
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if ( strlen ( outbuf ) != stat )
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{
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fclose ( out );
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throw AccessDeniedException ( filename );
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}
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fclose ( out );
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}
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