mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-25 19:07:45 +00:00
79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
|
/* vsprintf with automatic memory allocation.
|
||
|
|
Copyright (C) 2002-2004 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify it
|
||
|
|
under the terms of the GNU Library General Public License as published
|
||
|
|
by the Free Software Foundation; either version 2, 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with this program; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
||
|
|
USA. */
|
||
|
|
|
||
|
|
#ifndef _VASNPRINTF_H
|
||
|
|
#define _VASNPRINTF_H
|
||
|
|
|
||
|
|
/* Get va_list. */
|
||
|
|
#include <stdarg.h>
|
||
|
|
|
||
|
|
/* Get size_t. */
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#ifndef __attribute__
|
||
|
|
/* This feature is available in gcc versions 2.5 and later. */
|
||
|
|
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
|
||
|
|
# define __attribute__(Spec) /* empty */
|
||
|
|
# endif
|
||
|
|
/* The __-protected variants of `format' and `printf' attributes
|
||
|
|
are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
|
||
|
|
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
|
||
|
|
# define __format__ format
|
||
|
|
# define __printf__ printf
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Write formatted output to a string dynamically allocated with malloc().
|
||
|
|
You can pass a preallocated buffer for the result in RESULTBUF and its
|
||
|
|
size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
|
||
|
|
If successful, return the address of the string (this may be = RESULTBUF
|
||
|
|
if no dynamic memory allocation was necessary) and set *LENGTHP to the
|
||
|
|
number of resulting bytes, excluding the trailing NUL. Upon error, set
|
||
|
|
errno and return NULL.
|
||
|
|
|
||
|
|
When dynamic memory allocation occurs, the preallocated buffer is left
|
||
|
|
alone (with possibly modified contents). This makes it possible to use
|
||
|
|
a statically allocated or stack-allocated buffer, like this:
|
||
|
|
|
||
|
|
char buf[100];
|
||
|
|
size_t len = sizeof (buf);
|
||
|
|
char *output = vasnprintf (buf, &len, format, args);
|
||
|
|
if (output == NULL)
|
||
|
|
... error handling ...;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
... use the output string ...;
|
||
|
|
if (output != buf)
|
||
|
|
free (output);
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
extern char * asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
|
||
|
|
__attribute__ ((__format__ (__printf__, 3, 4)));
|
||
|
|
extern char * vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
|
||
|
|
__attribute__ ((__format__ (__printf__, 3, 0)));
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _VASNPRINTF_H */
|