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c3301189bd
2000-11-26 Ulrich Drepper <drepper@redhat.com> * inet/getnameinfo.c: Adjust casts to avoid warnings. * inet/rcmd.c: Likewise. * inet/ruserpass.c: Likewise. * inet/netinet/in.h (IN6_IS_ADDR_UNSPECIFIED, IN6_IS_ADDR_LOOPBACK, IN6_IS_ADDR_MULTICAST, IN6_IS_ADDR_LINKLOCAL, IN6_IS_ADDR_SITELOCAL, IN6_IS_ADDR_V4MAPPED, IN6_IS_ADDR_V4COMPAT, IN6_ARE_ADDR_EQUAL, IN6_IS_ADDR_MC_NODELOCAL, IN6_IS_ADDR_MC_LINKLOCAL, IN6_IS_ADDR_MC_SITELOCAL, IN6_IS_ADDR_MC_ORGLOCAL, IN6_IS_ADDR_MC_GLOBAL): Preserve const in cast. * include/aliases.h: Add prototypes for internal __getalias* functions. * include/netdb.h: Add prototypes for __old_gethostent_r, __old_gethostbyaddr_r, __old_gethostbyname_r, __old_gethostbyname2_r, __old_getnetent_r, __old_getnetbyaddr_r, __old_getnetbyname_r, __old_getservent_r, __old_getservbyname_r, __old_getservbyport_r, __old_getprotoent_r, __old_getprotobyname_r, __old_getprotobynumber_r. * include/rpc/netdb.h: Add prototypes for __old_getrpcbyname_r, __old_getrpcbynumber_r, __old_getrpcent_r. * include/rpc/netdb.h: Add __getrpcbyname_r, __getrpcbynumber_r, __getrpcent_r prototypes.
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
/* Return the offset of one string within another.
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Copyright (C) 1994,1996,1997,1998,1999,2000 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/*
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* My personal strstr() implementation that beats most other algorithms.
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* Until someone tells me otherwise, I assume that this is the
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* fastest implementation of strstr() in C.
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* I deliberately chose not to comment it. You should have at least
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* as much fun trying to understand it, as I had to write it :-).
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*
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* Stephen R. van den Berg, berg@pool.informatik.rwth-aachen.de */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <ctype.h>
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#if defined _LIBC || defined HAVE_STRING_H
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# include <string.h>
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#endif
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typedef unsigned chartype;
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#undef strcasestr
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#undef __strcasestr
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char *
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__strcasestr (phaystack, pneedle)
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const char *phaystack;
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const char *pneedle;
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{
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register const unsigned char *haystack, *needle;
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register chartype b, c;
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haystack = (const unsigned char *) phaystack;
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needle = (const unsigned char *) pneedle;
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b = _tolower (*needle);
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if (b != '\0')
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{
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haystack--; /* possible ANSI violation */
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do
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{
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c = *++haystack;
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if (c == '\0')
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goto ret0;
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}
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while (_tolower (c) != (int) b);
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c = _tolower (*++needle);
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if (c == '\0')
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goto foundneedle;
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++needle;
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goto jin;
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for (;;)
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{
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register chartype a;
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register const unsigned char *rhaystack, *rneedle;
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do
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{
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a = *++haystack;
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if (a == '\0')
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goto ret0;
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if (_tolower (a) == (int) b)
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break;
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a = *++haystack;
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if (a == '\0')
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goto ret0;
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shloop:
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;
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}
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while (_tolower (a) != (int) b);
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jin: a = *++haystack;
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if (a == '\0')
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goto ret0;
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if (_tolower (a) != (int) c)
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goto shloop;
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rhaystack = haystack-- + 1;
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rneedle = needle;
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a = _tolower (*rneedle);
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if (_tolower (*rhaystack) == (int) a)
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do
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{
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if (a == '\0')
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goto foundneedle;
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++rhaystack;
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a = _tolower (*++needle);
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if (_tolower (*rhaystack) != (int) a)
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break;
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if (a == '\0')
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goto foundneedle;
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++rhaystack;
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a = _tolower (*++needle);
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}
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while (_tolower (*rhaystack) == (int) a);
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needle = rneedle; /* took the register-poor approach */
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if (a == '\0')
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break;
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}
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}
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foundneedle:
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return (char*) haystack;
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ret0:
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return 0;
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}
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weak_alias (__strcasestr, strcasestr)
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