gl/vasnprintf.h

   1 /* vsprintf with automatic memory allocation.
   2    Copyright (C) 2002-2003 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU Library General Public License as published
   6    by the Free Software Foundation; either version 2, 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 GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17    USA.  */
  18
  19 #ifndef _VASNPRINTF_H
  20 #define _VASNPRINTF_H
  21
  22 /* Get va_list.  */
  23 #include <stdarg.h>
  24
  25 /* Get size_t.  */
  26 #include <stddef.h>
  27
  28 #ifndef __attribute__
  29 /* This feature is available in gcc versions 2.5 and later.  */
  30 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
  31 #  define __attribute__(Spec) /* empty */
  32 # endif
  33 /* The __-protected variants of `format' and `printf' attributes
  34    are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
  35 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
  36 #  define __format__ format
  37 #  define __printf__ printf
  38 # endif
  39 #endif
  40
  41 #ifdef  __cplusplus
  42 extern "C" {
  43 #endif
  44
  45 /* Write formatted output to a string dynamically allocated with malloc().
  46    You can pass a preallocated buffer for the result in RESULTBUF and its
  47    size in *LENGTHP; otherwise you pass RESULTBUF = NULL.
  48    If successful, return the address of the string (this may be = RESULTBUF
  49    if no dynamic memory allocation was necessary) and set *LENGTHP to the
  50    number of resulting bytes, excluding the trailing NUL.  Upon error, set
  51    errno and return NULL.  */
  52 extern char * asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
  53        __attribute__ ((__format__ (__printf__, 3, 4)));
  54 extern char * vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
  55        __attribute__ ((__format__ (__printf__, 3, 0)));
  56
  57 #ifdef  __cplusplus
  58 }
  59 #endif
  60
  61 #endif /* _VASNPRINTF_H */