From 840643efa638de9dc44f45dc4f3f1c81c2985498 Mon Sep 17 00:00:00 2001
From: Fathi Boudra <fabo@debian.org>
Date: Thu, 20 Oct 2011 15:18:11 +0300
Subject: Initial import

---
 code/sys/con_log.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 code/sys/con_log.c

(limited to 'code/sys/con_log.c')

diff --git a/code/sys/con_log.c b/code/sys/con_log.c
new file mode 100644
index 0000000..c3a4a5b
--- /dev/null
+++ b/code/sys/con_log.c
@@ -0,0 +1,129 @@
+/*
+===========================================================================
+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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