quakeforge/libs/gamecode/pr_zone.c
Bill Currie 349f8067c3 [gamecode] Conform with libc malloc for pr zone
Allocating 0 bytes returns null and freeing a null pointer is safe.
2021-09-26 12:03:44 +09:00

110 lines
2.2 KiB
C

/*
pr_zone.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 <stdarg.h>
#include "QF/cvar.h"
#include "QF/mathlib.h"
#include "QF/progs.h"
#include "QF/sys.h"
#include "QF/zone.h"
#include "compat.h"
static void
pr_zone_error (void *_pr, const char *msg)
{
progs_t *pr = (progs_t *) _pr;
Z_Print (pr->zone);
PR_RunError (pr, "%s", msg);
}
void
PR_Zone_Init (progs_t *pr)
{
Z_ClearZone (pr->zone, pr->zone_size,
(pr_type_t *)pr->zone - pr->pr_globals, sizeof (pr_type_t));
Z_SetError (pr->zone, pr_zone_error, pr);
}
VISIBLE void
PR_Zone_Free (progs_t *pr, void *ptr)
{
if (ptr) {
Z_Free (pr->zone, ptr);
}
}
VISIBLE void *
PR_Zone_Malloc (progs_t *pr, pr_int_t size)
{
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_Malloc (pr->zone, size);
}
VISIBLE void *
PR_Zone_TagMalloc (progs_t *pr, int size, int tag)
{
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_TagMalloc (pr->zone, size, tag);
}
VISIBLE void *
PR_Zone_Realloc (progs_t *pr, void *ptr, pr_int_t size)
{
if (ptr && !size) {
Z_Free (pr->zone, ptr);
return 0;
}
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_Realloc (pr->zone, ptr, size);
}