| /* Checking sprintf. |
| Copyright (C) 2005, 2009 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC 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 3, or (at your option) any later |
| version. |
| |
| In addition to the permissions in the GNU General Public License, the |
| Free Software Foundation gives you unlimited permission to link the |
| compiled version of this file into combinations with other programs, |
| and to distribute those combinations without any restriction coming |
| from the use of this file. (The General Public License restrictions |
| do apply in other respects; for example, they cover modification of |
| the file, and distribution when not linked into a combine |
| executable.) |
| |
| GCC 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| |
| #include "config.h" |
| #include <ssp/ssp.h> |
| #include <stdarg.h> |
| #ifdef HAVE_LIMITS_H |
| # include <limits.h> |
| #endif |
| #ifdef HAVE_STDIO_H |
| # include <stdio.h> |
| #endif |
| |
| extern void __chk_fail (void) __attribute__((__noreturn__)); |
| |
| #ifdef HAVE_USABLE_VSNPRINTF |
| int |
| __sprintf_chk (char *s, int flags __attribute__((unused)), |
| size_t slen, const char *format, ...) |
| { |
| va_list arg; |
| int done; |
| |
| va_start (arg, format); |
| if (slen > (size_t) INT_MAX) |
| done = vsprintf (s, format, arg); |
| else |
| { |
| done = vsnprintf (s, slen, format, arg); |
| if (done >= 0 && (size_t) done >= slen) |
| __chk_fail (); |
| } |
| va_end (arg); |
| return done; |
| } |
| #endif |