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/* Copyright (C) 2004, 2005, 2007, 2009, 2010 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with the GNU C Library; if not, write to the Free |
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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02111-1307 USA. */ |
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#ifndef _STRING_H |
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# error "Never use directly; include instead." |
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#endif |
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__warndecl (__warn_memset_zero_len, |
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"memset used with constant zero length parameter; this could be due to transposed parameters"); |
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#ifndef __cplusplus |
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/* XXX This is temporarily. We should not redefine any of the symbols |
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and instead integrate the error checking into the original |
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definitions. */ |
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# undef memcpy |
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# undef memmove |
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# undef memset |
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# undef strcat |
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# undef strcpy |
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# undef strncat |
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# undef strncpy |
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# ifdef __USE_GNU |
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# undef mempcpy |
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# undef stpcpy |
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# endif |
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# ifdef __USE_BSD |
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# undef bcopy |
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# undef bzero |
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# endif |
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#endif |
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__extern_always_inline void * |
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__NTH (memcpy (void *__restrict __dest, __const void *__restrict __src, |
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size_t __len)) |
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{ |
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return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest)); |
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} |
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__extern_always_inline void * |
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__NTH (memmove (void *__dest, __const void *__src, size_t __len)) |
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{ |
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return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest)); |
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} |
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#ifdef __USE_GNU |
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__extern_always_inline void * |
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__NTH (mempcpy (void *__restrict __dest, __const void *__restrict __src, |
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size_t __len)) |
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{ |
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return __builtin___mempcpy_chk (__dest, __src, __len, __bos0 (__dest)); |
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} |
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#endif |
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/* The first two tests here help to catch a somewhat common problem |
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where the second and third parameter are transposed. This is |
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especially problematic if the intended fill value is zero. In this |
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case no work is done at all. We detect these problems by referring |
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non-existing functions. */ |
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__extern_always_inline void * |
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__NTH (memset (void *__dest, int __ch, size_t __len)) |
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{ |
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if (__builtin_constant_p (__len) && __len == 0 |
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&& (!__builtin_constant_p (__ch) || __ch != 0)) |
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{ |
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__warn_memset_zero_len (); |
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return __dest; |
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} |
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return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest)); |
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} |
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#ifdef __USE_BSD |
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__extern_always_inline void |
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__NTH (bcopy (__const void *__src, void *__dest, size_t __len)) |
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{ |
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(void) __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest)); |
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} |
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__extern_always_inline void |
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__NTH (bzero (void *__dest, size_t __len)) |
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{ |
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(void) __builtin___memset_chk (__dest, '\0', __len, __bos0 (__dest)); |
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} |
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#endif |
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__extern_always_inline char * |
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__NTH (strcpy (char *__restrict __dest, __const char *__restrict __src)) |
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{ |
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return __builtin___strcpy_chk (__dest, __src, __bos (__dest)); |
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} |
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#ifdef __USE_GNU |
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__extern_always_inline char * |
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__NTH (stpcpy (char *__restrict __dest, __const char *__restrict __src)) |
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{ |
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return __builtin___stpcpy_chk (__dest, __src, __bos (__dest)); |
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} |
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#endif |
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__extern_always_inline char * |
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__NTH (strncpy (char *__restrict __dest, __const char *__restrict __src, |
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size_t __len)) |
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{ |
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return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest)); |
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} |
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// XXX We have no corresponding builtin yet. |
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extern char *__stpncpy_chk (char *__dest, __const char *__src, size_t __n, |
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size_t __destlen) __THROW; |
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extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, |
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__const char *__src, |
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size_t __n), stpncpy); |
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__extern_always_inline char * |
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__NTH (stpncpy (char *__dest, __const char *__src, size_t __n)) |
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{ |
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if (__bos (__dest) != (size_t) -1 |
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&& (!__builtin_constant_p (__n) || __n <= __bos (__dest))) |
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return __stpncpy_chk (__dest, __src, __n, __bos (__dest)); |
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return __stpncpy_alias (__dest, __src, __n); |
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} |
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__extern_always_inline char * |
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__NTH (strcat (char *__restrict __dest, __const char *__restrict __src)) |
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{ |
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return __builtin___strcat_chk (__dest, __src, __bos (__dest)); |
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} |
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__extern_always_inline char * |
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__NTH (strncat (char *__restrict __dest, __const char *__restrict __src, |
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size_t __len)) |
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{ |
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return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest)); |
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} |