blob: d4cc5ca2dfea658464e854a1ca7e19987aa05f6f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/* SPDX-License-Identifier: MIT
* Source: https://ccodearchive.net/info/asprintf.html */
#ifndef CCAN_ASPRINTF_H
#define CCAN_ASPRINTF_H
#include "config.h"
#include <ccan/compiler/compiler.h>
/**
* afmt - allocate and populate a string with the given format.
* @fmt: printf-style format.
*
* This is a simplified asprintf interface. Returns NULL on error.
*/
char *PRINTF_FMT(1, 2) afmt(const char *fmt, ...);
#if HAVE_ASPRINTF
#include <stdio.h>
#else
#include <stdarg.h>
/**
* asprintf - printf to a dynamically-allocated string.
* @strp: pointer to the string to allocate.
* @fmt: printf-style format.
*
* Returns -1 (and leaves @strp undefined) on an error. Otherwise returns
* number of bytes printed into @strp.
*
* Example:
* static char *greeting(const char *name)
* {
* char *str;
* int len = asprintf(&str, "Hello %s", name);
* if (len < 0)
* return NULL;
* return str;
* }
*/
int PRINTF_FMT(2, 3) asprintf(char **strp, const char *fmt, ...);
/**
* vasprintf - vprintf to a dynamically-allocated string.
* @strp: pointer to the string to allocate.
* @fmt: printf-style format.
*
* Returns -1 (and leaves @strp undefined) on an error. Otherwise returns
* number of bytes printed into @strp.
*/
int vasprintf(char **strp, const char *fmt, va_list ap);
#endif
#endif /* CCAN_ASPRINTF_H */
|
