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/*
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "shared/shared.h"
#include "common/protocol.h"
#include "common/sizebuf.h"
void SZ_TagInit(sizebuf_t *buf, void *data, size_t size, uint32_t tag)
{
memset(buf, 0, sizeof(*buf));
buf->data = data;
buf->maxsize = size;
buf->tag = tag;
}
void SZ_Init(sizebuf_t *buf, void *data, size_t size)
{
memset(buf, 0, sizeof(*buf));
buf->data = data;
buf->maxsize = size;
buf->allowoverflow = qtrue;
buf->allowunderflow = qtrue;
}
void SZ_Clear(sizebuf_t *buf)
{
buf->cursize = 0;
buf->readcount = 0;
buf->bitpos = 0;
buf->overflowed = qfalse;
}
void *SZ_GetSpace(sizebuf_t *buf, size_t len)
{
void *data;
if (buf->cursize > buf->maxsize) {
Com_Error(ERR_FATAL,
"%s: %#x: already overflowed",
__func__, buf->tag);
}
if (len > buf->maxsize - buf->cursize) {
if (len > buf->maxsize) {
Com_Error(ERR_FATAL,
"%s: %#x: %"PRIz" is > full buffer size %"PRIz"",
__func__, buf->tag, len, buf->maxsize);
}
if (!buf->allowoverflow) {
Com_Error(ERR_FATAL,
"%s: %#x: overflow without allowoverflow set",
__func__, buf->tag);
}
//Com_DPrintf("%s: %#x: overflow\n", __func__, buf->tag);
SZ_Clear(buf);
buf->overflowed = qtrue;
}
data = buf->data + buf->cursize;
buf->cursize += len;
buf->bitpos = buf->cursize << 3;
return data;
}
void SZ_WriteByte(sizebuf_t *sb, int c)
{
byte *buf;
buf = SZ_GetSpace(sb, 1);
buf[0] = c;
}
void SZ_WriteShort(sizebuf_t *sb, int c)
{
byte *buf;
buf = SZ_GetSpace(sb, 2);
buf[0] = c & 0xff;
buf[1] = c >> 8;
}
void SZ_WriteLong(sizebuf_t *sb, int c)
{
byte *buf;
buf = SZ_GetSpace(sb, 4);
buf[0] = c & 0xff;
buf[1] = (c >> 8) & 0xff;
buf[2] = (c >> 16) & 0xff;
buf[3] = c >> 24;
}
#if USE_MVD_SERVER
void SZ_WriteString(sizebuf_t *sb, const char *s)
{
size_t len;
if (!s) {
SZ_WriteByte(sb, 0);
return;
}
len = strlen(s);
if (len >= MAX_NET_STRING) {
Com_WPrintf("%s: overflow: %"PRIz" chars", __func__, len);
SZ_WriteByte(sb, 0);
return;
}
SZ_Write(sb, s, len + 1);
}
#endif
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