mirror of
https://github.com/reactos/reactos.git
synced 2025-07-23 11:03:49 +00:00
85 lines
2 KiB
C++
85 lines
2 KiB
C++
/*
|
|
* Copyright (C) 2005 Casper S. Hornstrup
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include "pch.h"
|
|
#include <assert.h>
|
|
|
|
#include "rbuild.h"
|
|
|
|
using std::string;
|
|
|
|
/* static */ void
|
|
FileSupportCode::WriteIfChanged ( char* outbuf,
|
|
string filename )
|
|
{
|
|
FILE* out;
|
|
unsigned int end;
|
|
char* cmpbuf;
|
|
unsigned int stat;
|
|
|
|
out = fopen ( filename.c_str (), "rb" );
|
|
if ( out == NULL )
|
|
{
|
|
out = fopen ( filename.c_str (), "wb" );
|
|
if ( out == NULL )
|
|
throw AccessDeniedException ( filename );
|
|
fputs ( outbuf, out );
|
|
fclose ( out );
|
|
return;
|
|
}
|
|
|
|
fseek ( out, 0, SEEK_END );
|
|
end = ftell ( out );
|
|
cmpbuf = (char*) malloc ( end );
|
|
if ( cmpbuf == NULL )
|
|
{
|
|
fclose ( out );
|
|
throw OutOfMemoryException ();
|
|
}
|
|
|
|
fseek ( out, 0, SEEK_SET );
|
|
stat = fread ( cmpbuf, 1, end, out );
|
|
if ( stat != end )
|
|
{
|
|
free ( cmpbuf );
|
|
fclose ( out );
|
|
throw AccessDeniedException ( filename );
|
|
}
|
|
if ( end == strlen ( outbuf ) && memcmp ( cmpbuf, outbuf, end ) == 0 )
|
|
{
|
|
free ( cmpbuf );
|
|
fclose ( out );
|
|
return;
|
|
}
|
|
|
|
free ( cmpbuf );
|
|
fclose ( out );
|
|
out = fopen ( filename.c_str (), "wb" );
|
|
if ( out == NULL )
|
|
{
|
|
throw AccessDeniedException ( filename );
|
|
}
|
|
|
|
stat = fwrite ( outbuf, 1, strlen ( outbuf ), out);
|
|
if ( strlen ( outbuf ) != stat )
|
|
{
|
|
fclose ( out );
|
|
throw AccessDeniedException ( filename );
|
|
}
|
|
|
|
fclose ( out );
|
|
}
|