1/* Formatted output to strings. 2 Copyright (C) 1999, 2002, 2006-2007 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 17 USA. */ 18 19#include <config.h> 20 21/* Specification. */ 22#ifdef IN_LIBASPRINTF 23# include "vasprintf.h" 24#else 25# include <stdio.h> 26#endif 27 28#include <errno.h> 29#include <limits.h> 30#include <stdlib.h> 31 32#include "vasnprintf.h" 33 34/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */ 35#ifndef EOVERFLOW 36# define EOVERFLOW E2BIG 37#endif 38 39int 40vasprintf (char **resultp, const char *format, va_list args) 41{ 42 size_t length; 43 char *result = vasnprintf (NULL, &length, format, args); 44 if (result == NULL) 45 return -1; 46 47 if (length > INT_MAX) 48 { 49 free (result); 50 errno = EOVERFLOW; 51 return -1; 52 } 53 54 *resultp = result; 55 /* Return the number of resulting bytes, excluding the trailing NUL. */ 56 return length; 57} 58