quakeforge/libs/ruamoko/rua_runtime.c
Bill Currie d90d409d2c [ruamoko] Handle 0-length @va_list for va_copy
Fixes a progs crash when using vsprintf with no format elements +
params.
2020-06-29 14:19:50 +09:00

81 lines
1.9 KiB
C

/*
bi_runtime.c
QuakeC runtime api
Copyright (C) 2020 Bill Currie
Author: Bill Currie <bill@taniwha.org>
Date: 2020/4/1
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 <stdlib.h>
#include "qfalloca.h"
#if defined(_WIN32) && defined(HAVE_MALLOC_H)
#include <malloc.h>
#endif
#include "QF/progs.h"
#include "rua_internal.h"
static void
bi_va_copy (progs_t *pr)
{
__auto_type src_args = (pr_va_list_t *) &P_POINTER (pr, 0);
__auto_type src_list = &G_STRUCT (pr, pr_type_t, src_args->list);
size_t parm_size = pr->pr_param_size * sizeof(pr_type_t);
size_t size = src_args->count * parm_size;
string_t dst_list_block = 0;
pr_type_t *dst_list = 0;
if (size) {
dst_list_block = PR_AllocTempBlock (pr, size);
dst_list = (pr_type_t *) PR_GetString (pr, dst_list_block);
}
memcpy (dst_list, src_list, size);
R_PACKED (pr, pr_va_list_t).count = src_args->count;
R_PACKED (pr, pr_va_list_t).list = PR_SetPointer (pr, dst_list);
}
static builtin_t builtins[] = {
{"va_copy", bi_va_copy, -1},
{0}
};
void
RUA_Runtime_Init (progs_t *pr, int secure)
{
PR_RegisterBuiltins (pr, builtins);
}