Mercurial > gnulib
view lib/c-vasprintf.c @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* Formatted output to strings in C locale. Copyright (C) 1999, 2002, 2006-2019 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include "c-vasprintf.h" #include <errno.h> #include <limits.h> #include <stdlib.h> #include "c-vasnprintf.h" int c_vasprintf (char **resultp, const char *format, va_list args) { size_t length; char *result = c_vasnprintf (NULL, &length, format, args); if (result == NULL) return -1; if (length > INT_MAX) { free (result); errno = EOVERFLOW; return -1; } *resultp = result; /* Return the number of resulting bytes, excluding the trailing NUL. */ return length; }