1 /* Formatted output to strings. 2 Copyright (C) 1999, 2002, 2006-2021 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 /* Specification. */ 20 #ifdef IN_LIBASPRINTF 21 # include "vasprintf.h" 22 #else 23 # include <stdio.h> 24 #endif 25 26 #include <errno.h> 27 #include <limits.h> 28 #include <stdlib.h> 29 30 #include "vasnprintf.h" 31 32 int 33 vasprintf (char **resultp, const char *format, va_list args) /* */ 34 { 35 size_t length; 36 char *result = vasnprintf (NULL, &length, format, args); 37 if (result == NULL) 38 return -1; 39 40 if (length > INT_MAX) 41 { 42 free (result); 43 errno = EOVERFLOW; 44 return -1; 45 } 46 47 *resultp = result; 48 /* Return the number of resulting bytes, excluding the trailing NUL. */ 49 return length; 50 }