glibc/wcsmbs/wcsstr.c
Ulrich Drepper 33a934a3ab update from main archive 970125
Sun Jan 26 05:41:42 1997  Ulrich Drepper  <drepper@cygnus.com>

	* version.h (VERSION): Bump to 2.0.
	(RELEASE): Now it's "experimental".

	* Makefile (subdirs): Change $(malloc) to malloc.  We have only
	one malloc implementation again.
	* malloc/*: Remove from GNU libc.
	* new-malloc/* Move to malloc/.
	* config.make.in (defines): Remove @USE_NEW_MALLOC@.
	* configure.in: Remove --enable-new-malloc option and check for
	malloc implementation choice.
	* malloc.h: We don't need to check for the implementation to use
	anymore.  Simply include malloc/malloc.h.
	* malloc/Makefile (subdir): Change to malloc.
	* sysdeps/unix/sysv/linux/configure.in: Don't set malloc anymore.

	* Makefile: Add special goal to call generate only-MD5 based crypt
	library.
	* md5-crypt/Makefile: Likewise.

	* stdio-common/tstscanf.c: De-ANSI-declfy.  Update copyright.
	(rounds): Change type to size_t to prevent warning.

	* wcsmbs/btowc.c: Reformat copyright.
	* wcsmbs/mbrlen.c: Likewise.
	* wcsmbs/mbsinit.c: Likewise.
	* wcsmbs/mbsnrtowcs.c: Likewise.
	* wcsmbs/mbsrtowcs.c: Likewise.
	* wcsmbs/wcpcpy.c: Likewise.
	* wcsmbs/wcpncpy.c: Likewise.
	* wcsmbs/wcscat.c: Likewise.
	* wcsmbs/wcscmp.c: Likewise.
	* wcsmbs/wcscoll.c: Likewise.
	* wcsmbs/wcscpy.c: Likewise.
	* wcsmbs/wcscspn.c: Likewise.
	* wcsmbs/wcsdup.c: Likewise.
	* wcsmbs/wcslen.c: Likewise.
	* wcsmbs/wcsncat.c: Likewise.
	* wcsmbs/wcsncpy.c: Likewise.
	* wcsmbs/wcsnrtombs.c: Likewise.
	* wcsmbs/wcsrtombs.c: Likewise.
	* wcsmbs/wcsspn.c: Likewise.
	* wcsmbs/wcsstr.c: Likewise.
	* wcsmbs/wcstod.c: Likewise.
	* wcsmbs/wcstof.c: Likewise.
	* wcsmbs/wcstok.c: Likewise.
	* wcsmbs/wcstol.c: Likewise.
	* wcsmbs/wcstold.c: Likewise.
	* wcsmbs/wcstoq.c: Likewise.
	* wcsmbs/wcstoul.c: Likewise.
	* wcsmbs/wcstouq.c: Likewise.
	* wcsmbs/wcswidth.c: Likewise.
	* wcsmbs/wcsxfrm.c: Likewise.
	* wcsmbs/wctob.c: Likewise.
	* wcsmbs/wcwidth.c: Likewise.
	* wcsmbs/wcwidth.h: Likewise.
	* wcsmbs/wmemchr.c: Likewise.
	* wcsmbs/wmemcmp.c: Likewise.
	* wcsmbs/wmemmove.c: Likewise.
	* wcsmbs/wmemset.c: Likewise.

Sat Jan 25 03:34:14 1997  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/termbits.h: Protect against multiple
	inclusion.  Reported by a sun <asun@zoology.washington.edu>.

	Likewise for scanf4.c
	* stdlib/stdlib.h: Declare reentrant function from rand48 family
1997-01-26 05:33:35 +00:00

98 lines
2.5 KiB
C

/* Copyright (C) 1995, 1996, 1997 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. */
/*
* The original strstr() file contains the following comment:
*
* 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 <wchar.h>
wchar_t *
wcsstr (haystack, needle)
const wchar_t *haystack;
const wchar_t *needle;
{
register wchar_t b, c;
if ((b = *needle) != L'\0')
{
haystack--; /* possible ANSI violation */
do
if ((c = *++haystack) == L'\0')
goto ret0;
while (c != b);
if (!(c = *++needle))
goto foundneedle;
++needle;
goto jin;
for (;;)
{
register wchar_t a;
register const wchar_t *rhaystack, *rneedle;
do
{
if (!(a = *++haystack))
goto ret0;
if (a == b)
break;
if ((a = *++haystack) == L'\0')
goto ret0;
shloop: ;
}
while (a != b);
jin: if (!(a = *++haystack))
goto ret0;
if (a != c)
goto shloop;
if (*(rhaystack = haystack-- + 1) == (a = *(rneedle = needle)))
do
{
if (a == L'\0')
goto foundneedle;
if (*++rhaystack != (a = *++needle))
break;
if (a == L'\0')
goto foundneedle;
}
while (*++rhaystack == (a = *++needle));
needle = rneedle; /* took the register-poor approach */
if (a == L'\0')
break;
}
}
foundneedle:
return (wchar_t*) haystack;
ret0:
return NULL;
}