|
398
|
1 /* vsprintf with automatic memory allocation.
|
|
|
2 Copyright (C) 2002-2004, 2007-2010 Free Software Foundation, Inc.
|
|
|
3
|
|
|
4 This program is free software; you can redistribute it and/or modify
|
|
|
5 it under the terms of the GNU General Public License as published by
|
|
|
6 the Free Software Foundation; either version 3, or (at your option)
|
|
|
7 any later version.
|
|
|
8
|
|
|
9 This program is distributed in the hope that it will be useful,
|
|
|
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
12 GNU General Public License for more details.
|
|
|
13
|
|
|
14 You should have received a copy of the GNU General Public License along
|
|
|
15 with this program; if not, write to the Free Software Foundation,
|
|
|
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
17
|
|
|
18 #ifndef _VASNPRINTF_H
|
|
|
19 #define _VASNPRINTF_H
|
|
|
20
|
|
|
21 /* Get va_list. */
|
|
|
22 #include <stdarg.h>
|
|
|
23
|
|
|
24 /* Get size_t. */
|
|
|
25 #include <stddef.h>
|
|
|
26
|
|
|
27 #ifndef __attribute__
|
|
|
28 /* This feature is available in gcc versions 2.5 and later. */
|
|
|
29 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
|
|
|
30 # define __attribute__(Spec) /* empty */
|
|
|
31 # endif
|
|
|
32 /* The __-protected variants of `format' and `printf' attributes
|
|
|
33 are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
|
|
|
34 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
|
|
|
35 # define __format__ format
|
|
|
36 # define __printf__ printf
|
|
|
37 # endif
|
|
|
38 #endif
|
|
|
39
|
|
|
40 #ifdef __cplusplus
|
|
|
41 extern "C" {
|
|
|
42 #endif
|
|
|
43
|
|
|
44 /* Write formatted output to a string dynamically allocated with malloc().
|
|
|
45 You can pass a preallocated buffer for the result in RESULTBUF and its
|
|
|
46 size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
|
|
|
47 If successful, return the address of the string (this may be = RESULTBUF
|
|
|
48 if no dynamic memory allocation was necessary) and set *LENGTHP to the
|
|
|
49 number of resulting bytes, excluding the trailing NUL. Upon error, set
|
|
|
50 errno and return NULL.
|
|
|
51
|
|
|
52 When dynamic memory allocation occurs, the preallocated buffer is left
|
|
|
53 alone (with possibly modified contents). This makes it possible to use
|
|
|
54 a statically allocated or stack-allocated buffer, like this:
|
|
|
55
|
|
|
56 char buf[100];
|
|
|
57 size_t len = sizeof (buf);
|
|
|
58 char *output = vasnprintf (buf, &len, format, args);
|
|
|
59 if (output == NULL)
|
|
|
60 ... error handling ...;
|
|
|
61 else
|
|
|
62 {
|
|
|
63 ... use the output string ...;
|
|
|
64 if (output != buf)
|
|
|
65 free (output);
|
|
|
66 }
|
|
|
67 */
|
|
|
68 #if REPLACE_VASNPRINTF
|
|
|
69 # define asnprintf rpl_asnprintf
|
|
|
70 # define vasnprintf rpl_vasnprintf
|
|
|
71 #endif
|
|
|
72 extern char * asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
|
|
|
73 __attribute__ ((__format__ (__printf__, 3, 4)));
|
|
|
74 extern char * vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
|
|
|
75 __attribute__ ((__format__ (__printf__, 3, 0)));
|
|
|
76
|
|
|
77 #ifdef __cplusplus
|
|
|
78 }
|
|
|
79 #endif
|
|
|
80
|
|
|
81 #endif /* _VASNPRINTF_H */
|
