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Diffstat (limited to 'string/bits/string2.h')
| -rw-r--r-- | string/bits/string2.h | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/string/bits/string2.h b/string/bits/string2.h deleted file mode 100644 index 6a26e2b..0000000 --- a/string/bits/string2.h +++ /dev/null @@ -1,119 +0,0 @@ -/* Machine-independant string function optimizations. - Copyright (C) 1997-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _STRING_H -# error "Never use <bits/string2.h> directly; include <string.h> instead." -#endif - -#ifndef __NO_STRING_INLINES - -/* Unlike the definitions in the header <bits/string.h> the - definitions contained here are not optimized down to assembler - level. Those optimizations are not always a good idea since this - means the code size increases a lot. Instead the definitions here - optimize some functions in a way which do not dramatically - increase the code size and which do not use assembler. The main - trick is to use GCC's `__builtin_constant_p' function. - - Every function XXX which has a defined version in - <bits/string.h> must be accompanied by a symbol _HAVE_STRING_ARCH_XXX - to make sure we don't get redefinitions. - - We must use here macros instead of inline functions since the - trick won't work with the latter. */ - -#ifndef __STRING_INLINE -# ifdef __cplusplus -# define __STRING_INLINE inline -# else -# define __STRING_INLINE __extern_inline -# endif -#endif - -/* Dereferencing a pointer arg to run sizeof on it fails for the void - pointer case, so we use this instead. - Note that __x is evaluated twice. */ -#define __string2_1bptr_p(__x) \ - ((size_t)(const void *)((__x) + 1) - (size_t)(const void *)(__x) == 1) - -/* Set N bytes of S to 0. */ -#if !defined _HAVE_STRING_ARCH_memset -# define __bzero(s, n) __builtin_memset (s, '\0', n) -#endif - - -/* Copy SRC to DEST, returning pointer to final NUL byte. */ -#ifdef __USE_GNU -# ifndef _HAVE_STRING_ARCH_stpcpy -# define __stpcpy(dest, src) __builtin_stpcpy (dest, src) -/* In glibc we use this function frequently but for namespace reasons - we have to use the name `__stpcpy'. */ -# define stpcpy(dest, src) __stpcpy (dest, src) -# endif -#endif - - -/* Copy no more than N characters of SRC to DEST. */ -#ifndef _HAVE_STRING_ARCH_strncpy -# define strncpy(dest, src, n) __builtin_strncpy (dest, src, n) -#endif - - -/* Append no more than N characters from SRC onto DEST. */ -#ifndef _HAVE_STRING_ARCH_strncat -# ifdef _USE_STRING_ARCH_strchr -# define strncat(dest, src, n) \ - (__extension__ ({ char *__dest = (dest); \ - __builtin_constant_p (src) && __builtin_constant_p (n) \ - ? (strlen (src) < ((size_t) (n)) \ - ? strcat (__dest, src) \ - : (*((char *) __mempcpy (strchr (__dest, '\0'), \ - src, n)) = '\0', __dest)) \ - : strncat (dest, src, n); })) -# else -# define strncat(dest, src, n) __builtin_strncat (dest, src, n) -# endif -#endif - - -/* Return the length of the initial segment of S which - consists entirely of characters not in REJECT. */ -#ifndef _HAVE_STRING_ARCH_strcspn -# define strcspn(s, reject) __builtin_strcspn (s, reject) -#endif - - -/* Return the length of the initial segment of S which - consists entirely of characters in ACCEPT. */ -#ifndef _HAVE_STRING_ARCH_strspn -# define strspn(s, accept) __builtin_strspn (s, accept) -#endif - - -/* Find the first occurrence in S of any character in ACCEPT. */ -#ifndef _HAVE_STRING_ARCH_strpbrk -# define strpbrk(s, accept) __builtin_strpbrk (s, accept) -#endif - - -#ifndef _FORCE_INLINES -# undef __STRING_INLINE -#endif - -#endif /* No string inlines. */ |