mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 15:22:04 +00:00
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*
|
|
sizebuf.c
|
|
|
|
(description)
|
|
|
|
Copyright (C) 1996-1997 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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif
|
|
|
|
#include "QF/sizebuf.h"
|
|
#include "QF/sys.h"
|
|
#include "QF/zone.h"
|
|
|
|
|
|
VISIBLE void
|
|
SZ_Alloc (sizebuf_t *buf, int startsize)
|
|
{
|
|
if (startsize < 256)
|
|
startsize = 256;
|
|
buf->data = Hunk_AllocName (startsize, "sizebuf");
|
|
buf->maxsize = startsize;
|
|
buf->cursize = 0;
|
|
}
|
|
|
|
VISIBLE void
|
|
SZ_Clear (sizebuf_t *buf)
|
|
{
|
|
buf->cursize = 0;
|
|
buf->overflowed = false;
|
|
}
|
|
|
|
VISIBLE void *
|
|
SZ_GetSpace (sizebuf_t *buf, int length)
|
|
{
|
|
void *data;
|
|
|
|
if (buf->cursize + length <= buf->maxsize) {
|
|
getspace:
|
|
data = buf->data + buf->cursize;
|
|
buf->cursize += length;
|
|
return data;
|
|
}
|
|
|
|
if (!buf->allowoverflow)
|
|
Sys_Error ("SZ_GetSpace: overflow without allowoverflow set (%d)",
|
|
buf->maxsize);
|
|
|
|
if (length > buf->maxsize)
|
|
Sys_Error ("SZ_GetSpace: %i is > full buffer size", length);
|
|
|
|
Sys_Printf ("SZ_GetSpace: overflow\n");
|
|
SZ_Clear (buf);
|
|
buf->overflowed = true;
|
|
goto getspace;
|
|
}
|
|
|
|
VISIBLE void
|
|
SZ_Write (sizebuf_t *buf, const void *data, int length)
|
|
{
|
|
memcpy (SZ_GetSpace (buf, length), data, length);
|
|
}
|
|
|
|
VISIBLE void
|
|
SZ_Print (sizebuf_t *buf, const char *data)
|
|
{
|
|
int len;
|
|
|
|
len = strlen (data) + 1;
|
|
if (buf->cursize && !buf->data[buf->cursize - 1])
|
|
buf->cursize--; // write over trailing 0
|
|
|
|
memcpy (SZ_GetSpace (buf, len), data, len);
|
|
}
|