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