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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "../qcommon/q_shared.h"
#include "../qcommon/qcommon.h"
#include "sys_local.h"
#define MAX_LOG 32768
static char consoleLog[ MAX_LOG ];
static unsigned int writePos = 0;
static unsigned int readPos = 0;
/*
==================
CON_LogSize
==================
*/
unsigned int CON_LogSize( void )
{
if( readPos <= writePos )
return writePos - readPos;
else
return writePos + MAX_LOG - readPos;
}
/*
==================
CON_LogFree
==================
*/
static unsigned int CON_LogFree( void )
{
return MAX_LOG - CON_LogSize( ) - 1;
}
/*
==================
CON_LogWrite
==================
*/
unsigned int CON_LogWrite( const char *in )
{
unsigned int length = strlen( in );
unsigned int firstChunk;
unsigned int secondChunk;
while( CON_LogFree( ) < length && CON_LogSize( ) > 0 )
{
// Free enough space
while( consoleLog[ readPos ] != '\n' && CON_LogSize( ) > 1 )
readPos = ( readPos + 1 ) % MAX_LOG;
// Skip past the '\n'
readPos = ( readPos + 1 ) % MAX_LOG;
}
if( CON_LogFree( ) < length )
return 0;
if( writePos + length > MAX_LOG )
{
firstChunk = MAX_LOG - writePos;
secondChunk = length - firstChunk;
}
else
{
firstChunk = length;
secondChunk = 0;
}
Com_Memcpy( consoleLog + writePos, in, firstChunk );
Com_Memcpy( consoleLog, in + firstChunk, secondChunk );
writePos = ( writePos + length ) % MAX_LOG;
return length;
}
/*
==================
CON_LogRead
==================
*/
unsigned int CON_LogRead( char *out, unsigned int outSize )
{
unsigned int firstChunk;
unsigned int secondChunk;
if( CON_LogSize( ) < outSize )
outSize = CON_LogSize( );
if( readPos + outSize > MAX_LOG )
{
firstChunk = MAX_LOG - readPos;
secondChunk = outSize - firstChunk;
}
else
{
firstChunk = outSize;
secondChunk = 0;
}
Com_Memcpy( out, consoleLog + readPos, firstChunk );
Com_Memcpy( out + firstChunk, out, secondChunk );
readPos = ( readPos + outSize ) % MAX_LOG;
return outSize;
}
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