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authorClaudio Fontana <sick_soul@users.sourceforge.net>2005-11-01 09:18:33 +0000
committerClaudio Fontana <sick_soul@users.sourceforge.net>2005-11-01 09:18:33 +0000
commit0ed9e9bda21cf18774e2864d7312b76b94284578 (patch)
treef23a19cc7a3cdc2fcf75a3513cc14fe23a57638d /lib/strstr.c
parent1844565490b35f025e47445596a4577cc5afe13f (diff)
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Diffstat (limited to 'lib/strstr.c')
-rw-r--r--lib/strstr.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/lib/strstr.c b/lib/strstr.c
deleted file mode 100644
index cdee621..0000000
--- a/lib/strstr.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* Copyright (C) 1994 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-This program 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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; 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 */
-
-#include <string.h>
-#include <sys/types.h>
-
-typedef unsigned chartype;
-
-char *
-strstr (phaystack, pneedle)
- 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 aproach */
-
- if (a == '\0')
- break;
- }
- }
-foundneedle:
- return (char*) haystack;
-ret0:
- return 0;
-}