1 /*
2 * Copyright 2021, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /*
18 * This is a reimplementation of obstack_printf for use by libcpu, which
19 * uses it to print an error message.
20 */
21
22 #include <stdarg.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <obstack.h>
26
obstack_printf(struct obstack * obs,const char * format,...)27 int __attribute__((__format__(printf, 2, 3))) obstack_printf(struct obstack *obs, const char *format, ...) {
28
29 va_list ap;
30 va_start(ap, format);
31
32 char* str = NULL;
33 int len = vasprintf(&str, format, ap);
34 if (len < 0) {
35 return len;
36 }
37
38 obstack_grow(obs, str, len);
39 free(str);
40
41 return len;
42 }
43