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/*
* SZ.java
* Copyright (C) 2003
*
* $Id: SZ.java,v 1.1 2004-07-07 19:59:33 hzi Exp $
*/
/*
Copyright (C) 1997-2001 Id Software, Inc.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package jake2.qcommon;
import java.util.Arrays;
import jake2.Defines;
/**
* SZ
*/
public final class SZ {
public static void Clear(sizebuf_t buf) {
buf.clear();
}
//===========================================================================
public static void Init(sizebuf_t buf, byte data[], int length) {
//memset (buf, 0, sizeof(*buf));
//TODO: slow but safe;
Arrays.fill(data,(byte)0);
buf.data = data;
buf.maxsize = length;
}
/** Ask for the pointer using sizebuf_t.cursize (RST) */
public static int GetSpace(sizebuf_t buf, int length) {
int oldsize;
if (buf.cursize + length > buf.maxsize) {
if (!buf.allowoverflow)
Com.Error(Defines.ERR_FATAL, "SZ_GetSpace: overflow without allowoverflow set");
if (length > buf.maxsize)
Com.Error(Defines.ERR_FATAL, "SZ_GetSpace: " + length + " is > full buffer size");
Com.Printf("SZ_GetSpace: overflow\n");
Clear(buf);
buf.overflowed = true;
}
oldsize = buf.cursize;
buf.cursize += length;
return oldsize;
}
public static void Write(sizebuf_t buf, byte data[], int length) {
//memcpy(SZ_GetSpace(buf, length), data, length);
System.arraycopy(data, 0, buf.data, GetSpace(buf, length), length);
}
public static void Write(sizebuf_t buf, byte data[], int offset, int length) {
System.arraycopy(data, offset, buf.data, GetSpace(buf, length), length);
}
public static void Write(sizebuf_t buf, byte data[]) {
int length = data.length;
//memcpy(SZ_GetSpace(buf, length), data, length);
System.arraycopy(data, 0, buf.data, GetSpace(buf, length), length);
}
//
public static void Print(sizebuf_t buf, String data) {
int length = data.length();
byte str[] = data.getBytes();
if (buf.cursize != 0) {
if (buf.data[buf.cursize - 1] != 0) {
//memcpy( SZ_GetSpace(buf, len), data, len); // no trailing 0
System.arraycopy(str, 0, buf.data, GetSpace(buf, length+1), length);
} else {
System.arraycopy(str, 0, buf.data, GetSpace(buf, length)-1, length);
//memcpy(SZ_GetSpace(buf, len - 1) - 1, data, len); // write over trailing 0
}
} else
// first print.
System.arraycopy(str, 0, buf.data, GetSpace(buf, length), length);
//memcpy(SZ_GetSpace(buf, len), data, len);
buf.data[buf.cursize - 1]=0;
}
}
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