mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
4caef86ca6
1999-01-23 Ulrich Drepper <drepper@cygnus.com> * nss/nss_files/files-XXX.c (internal_getent): Make sure the buffer has at least two bytes (not one). Correct buflen parameter type. * nss/nss_files/files-alias.c (get_next_alias): Make sure buffer has at least two bytes. Use fgets_unlocked instead of fgets. * ctype/ctype.h: Don't user __tolower directly for tolower implementation. Use inline function which tests for the range first. Make _tolower equivalent to old tolower macros. Likewise for toupper. * ctype/ctype.c: Change tolower/toupper definition accordingly. * argp/argp-help.c: Use _tolower instead of tolower if possible. * inet/ether_aton_r.c: Likewise. * inet/ether_line.c: Likewise. * inet/rcmd.c: Likewise. * intl/l10nflist.c: Likewise. * locale/programs/ld-collate.c: Likewise. * locale/programs/linereader.c: Likewise. * locale/programs/localedef.c: Likewise. * nis/nss_nis/nis-alias.c: Likewise. * nis/nss_nis/nis-network.c: Likewise. * posix/regex.c: Likewise. * resolv/inet_net_pton.c: Likewise. * stdio-common/printf_fp.c: Likewise. * stdio-common/vfscanf.c: Likewise. * sysdeps/generic/strcasestr.c: Likewise. * math/bits/mathcalls.h: Fix typo.
131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/* Return the offset of one string within another.
|
|
Copyright (C) 1994, 1996, 1997, 1998, 1999 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
|
|
|
|
#include <ctype.h>
|
|
|
|
#if defined _LIBC || defined HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
|
|
typedef unsigned chartype;
|
|
|
|
#undef strcasestr
|
|
#undef __strcasestr
|
|
|
|
char *
|
|
__strcasestr (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 = _tolower (*needle);
|
|
if (b != '\0')
|
|
{
|
|
haystack--; /* possible ANSI violation */
|
|
do
|
|
{
|
|
c = *++haystack;
|
|
if (c == '\0')
|
|
goto ret0;
|
|
}
|
|
while (_tolower (c) != b);
|
|
|
|
c = _tolower (*++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 (_tolower (a) == b)
|
|
break;
|
|
a = *++haystack;
|
|
if (a == '\0')
|
|
goto ret0;
|
|
shloop: }
|
|
while (_tolower (a) != b);
|
|
|
|
jin: a = *++haystack;
|
|
if (a == '\0')
|
|
goto ret0;
|
|
|
|
if (_tolower (a) != c)
|
|
goto shloop;
|
|
|
|
rhaystack = haystack-- + 1;
|
|
rneedle = needle;
|
|
a = _tolower (*rneedle);
|
|
|
|
if (_tolower (*rhaystack) == a)
|
|
do
|
|
{
|
|
if (a == '\0')
|
|
goto foundneedle;
|
|
++rhaystack;
|
|
a = _tolower (*++needle);
|
|
if (_tolower (*rhaystack) != a)
|
|
break;
|
|
if (a == '\0')
|
|
goto foundneedle;
|
|
++rhaystack;
|
|
a = _tolower (*++needle);
|
|
}
|
|
while (_tolower (*rhaystack) == a);
|
|
|
|
needle = rneedle; /* took the register-poor approach */
|
|
|
|
if (a == '\0')
|
|
break;
|
|
}
|
|
}
|
|
foundneedle:
|
|
return (char*) haystack;
|
|
ret0:
|
|
return 0;
|
|
}
|
|
|
|
weak_alias (__strcasestr, strcasestr)
|