Differential D3459 Diff 8301 include/secure/_strings.h

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include/secure/_strings.h

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				/*-
				* Copyright (C) 2015 Olivér Pintér
				* All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* * Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* * Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in
				* the documentation and/or other materials provided with the
				* distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
				* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
				* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
				* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
				* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
				* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
				* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
				* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
				* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
				* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
				* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* $FreeBSD$
				*/

				#ifndef _STRINGS_H_
				#error "You should not use <secure/_strings.h> directly; include <sys/strings.h> instead."
				#endif

				#ifndef _SECURE_STRINGS_H_
				#define _SECURE_STRINGS_H_

				#include <secure/security.h>

				__BEGIN_DECLS

				extern void __bcopy_chk(void , const void *, size_t, size_t) __RENAME(__memmove_chk);
				extern void __bcopy_real(const void , void , size_t) __RENAME(bcopy);
				extern void __bzero_chk(void , int, size_t, size_t) __RENAME(__memset_chk);
				extern void __bzero_real(void *, size_t) __RENAME(bzero);
				extern char __rindex_chk(const char , int, size_t);
				extern char __rindex_real(const char , int) __RENAME(rindex);

				#ifdef __BSD_FORTIFY
				#if __BSD_VISIBLE \|\| __POSIX_VISIBLE <= 200112
				__FORTIFY_INLINE void
				bcopy(const void _s, void _d, size_t _l)
				{
				size_t _bos = __bos0(_d);

				#ifndef __clang__
				if (_bos == __FORTIFY_UNKNOWN_SIZE)
				__bcopy_real(_s, _d, _l);
				#endif

				(void)(__bcopy_chk(_d, _s, _l, _bos));
				}
				#endif


				#if __BSD_VISIBLE \|\| __POSIX_VISIBLE <= 200112
				__FORTIFY_INLINE void
				bzero(void *_s, size_t _n)
				{
				size_t _bos = __bos(_s);

				#ifndef __clang__
				if (_bos == __FORTIFY_UNKNOWN_SIZE)
				__bzero_real(_s, _n);
				#endif

				(void)(__bzero_chk(_s, '\0', _n, _bos));
				}
				#endif


				#if __BSD_VISIBLE \|\| __POSIX_VISIBLE <= 200112
				__FORTIFY_INLINE char *
				rindex(const char *_s, int _c)
				{
				size_t _bos = __bos(_s);
				#ifndef __clang__
				size_t _slen;

				/* Compiler doesn't know destination size. Don't call __strrchr_chk. */
				if (_bos == __FORTIFY_UNKNOWN_SIZE)
				return (__rindex_real(_s, _c));

				/*
				* Compiler can prove, at compile time, that the passed in size
				* is always <= the actual object size. Don't call __rindex_chk.
				*/
				_slen = __builtin_strlen(_s);
				if (__builtin_constant_p(_slen) && (_slen < _bos))
				return (__rindex_real(_s, _c));
				#endif

				return (__rindex_chk(_s, _c, _bos));
				}
				#endif


				#endif /* !__BSD_FORTIFY */

				__END_DECLS

				#endif /* !defined(_SECURE_STRINGS_H_) */