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