1 /*
2 * Copyright (c) 1990, 2007 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * and/or other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16 */
17 /* This code was copied from sprintf.c */
18 /* doc in sprintf.c */
19
20 #define _DEFAULT_SOURCE
21 #include <_ansi.h>
22 #include <stdio.h>
23 #include <stdarg.h>
24 #include <limits.h>
25 #include "local.h"
26
27 int
asprintf(char ** __restrict strp,const char * __restrict fmt,...)28 asprintf (char **__restrict strp,
29 const char *__restrict fmt, ...)
30 {
31 int ret;
32 va_list ap;
33 FILE f;
34
35 /* mark a zero-length reallocatable buffer */
36 f._flags = __SWR | __SSTR | __SMBF;
37 f._flags2 = 0;
38 f._bf._base = f._p = NULL;
39 f._bf._size = f._w = 0;
40 f._file = -1; /* No file. */
41 va_start (ap, fmt);
42 ret = svfprintf ( &f, fmt, ap);
43 va_end (ap);
44 if (ret >= 0)
45 {
46 *f._p = 0;
47 *strp = (char *) f._bf._base;
48 }
49 return (ret);
50 }
51
52 #ifdef _NANO_FORMATTED_IO
53 int
54 asiprintf (char **, const char *, ...)
55 _ATTRIBUTE ((__alias__("asprintf")));
56 #endif
57
