diff options
author | Bruno Haible <bruno@clisp.org> | 2003-02-13 21:38:24 +0000 |
---|---|---|
committer | Bruno Haible <bruno@clisp.org> | 2009-06-23 12:09:14 +0200 |
commit | 7b9bbc4ebf2fce14e99a9a54b13ff3424a39c4e0 (patch) | |
tree | 97d4a62e8597b6d43310d4d9bbd5586384261df9 /lib | |
parent | 7369811271d83ac8d8fad1ba9e9182ebcf900bea (diff) | |
download | external_gettext-7b9bbc4ebf2fce14e99a9a54b13ff3424a39c4e0.zip external_gettext-7b9bbc4ebf2fce14e99a9a54b13ff3424a39c4e0.tar.gz external_gettext-7b9bbc4ebf2fce14e99a9a54b13ff3424a39c4e0.tar.bz2 |
Move lib/strstr.c to gettext-tools/lib/strstr.c.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/strstr.c | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/lib/strstr.c b/lib/strstr.c deleted file mode 100644 index b16346b..0000000 --- a/lib/strstr.c +++ /dev/null @@ -1,123 +0,0 @@ -/* Return the offset of one string within another. - Copyright (C) 1994, 1996, 1997, 2000, 2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* - * My personal strstr() implementation that beats most other algorithms. - * Until someone tells me otherwise, I assume that this is the - * fastest implementation of strstr() in C. - * I deliberately chose not to comment it. You should have at least - * as much fun trying to understand it, as I had to write it :-). - * - * Stephen R. van den Berg, berg@pool.informatik.rwth-aachen.de */ - -#if HAVE_CONFIG_H -# include <config.h> -#endif - -#if defined _LIBC || defined HAVE_STRING_H -# include <string.h> -#endif - -typedef unsigned chartype; - -#undef strstr - -char * -strstr (const char *phaystack, const char *pneedle) -{ - register const unsigned char *haystack, *needle; - register chartype b, c; - - haystack = (const unsigned char *) phaystack; - needle = (const unsigned char *) pneedle; - - b = *needle; - if (b != '\0') - { - haystack--; /* possible ANSI violation */ - do - { - c = *++haystack; - if (c == '\0') - goto ret0; - } - while (c != b); - - c = *++needle; - if (c == '\0') - goto foundneedle; - ++needle; - goto jin; - - for (;;) - { - register chartype a; - register const unsigned char *rhaystack, *rneedle; - - do - { - a = *++haystack; - if (a == '\0') - goto ret0; - if (a == b) - break; - a = *++haystack; - if (a == '\0') - goto ret0; -shloop:; } - while (a != b); - -jin: a = *++haystack; - if (a == '\0') - goto ret0; - - if (a != c) - goto shloop; - - rhaystack = haystack-- + 1; - rneedle = needle; - a = *rneedle; - - if (*rhaystack == a) - do - { - if (a == '\0') - goto foundneedle; - ++rhaystack; - a = *++needle; - if (*rhaystack != a) - break; - if (a == '\0') - goto foundneedle; - ++rhaystack; - a = *++needle; - } - while (*rhaystack == a); - - needle = rneedle; /* took the register-poor approach */ - - if (a == '\0') - break; - } - } -foundneedle: - return (char*) haystack; -ret0: - return 0; -} |