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2004-03-15  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/generic/strcasestr.c (__strcasestr): Optimize use of
	tolower function.
This commit is contained in:
Ulrich Drepper 2004-03-15 08:55:28 +00:00
parent 58101473df
commit 4f514b6bf2
2 changed files with 28 additions and 13 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-03-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/generic/strcasestr.c (__strcasestr): Optimize use of
tolower function.
2004-03-13 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/i386/sysconf.c (intel_02_known): Add const.

36
sysdeps/generic/strcasestr.c
View File

@ -1,5 +1,5 @@
/* Return the offset of one string within another.
Copyright (C) 1994,1996,1997,1998,1999,2000 Free Software Foundation, Inc.
Copyright (C) 1994, 1996-2000, 2004 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
@ -36,6 +36,13 @@
# include <string.h>
#endif
#ifdef _LIBC
# include <locale/localeinfo.h>
# define TOLOWER(c) __tolower_l (c, loc)
#else
# define TOLOWER(c) _tolower (c)
#endif
typedef unsigned chartype;
#undef strcasestr
@ -48,11 +55,14 @@ __strcasestr (phaystack, pneedle)
{
register const unsigned char *haystack, *needle;
register chartype b, c;
#ifdef _LIBC
__locale_t loc = _NL_CURRENT_LOCALE;
#endif
haystack = (const unsigned char *) phaystack;
needle = (const unsigned char *) pneedle;
b = _tolower (*needle);
b = TOLOWER (*needle);
if (b != '\0')
{
haystack--; /* possible ANSI violation */
@ -62,9 +72,9 @@ __strcasestr (phaystack, pneedle)
if (c == '\0')
goto ret0;
}
while (_tolower (c) != (int) b);
while (TOLOWER (c) != (int) b);
c = _tolower (*++needle);
c = TOLOWER (*++needle);
if (c == '\0')
goto foundneedle;
++needle;
@ -80,7 +90,7 @@ __strcasestr (phaystack, pneedle)
a = *++haystack;
if (a == '\0')
goto ret0;
if (_tolower (a) == (int) b)
if (TOLOWER (a) == (int) b)
break;
a = *++haystack;
if (a == '\0')
@ -88,34 +98,34 @@ __strcasestr (phaystack, pneedle)
shloop:
;
}
while (_tolower (a) != (int) b);
while (TOLOWER (a) != (int) b);
jin: a = *++haystack;
if (a == '\0')
goto ret0;
if (_tolower (a) != (int) c)
if (TOLOWER (a) != (int) c)
goto shloop;
rhaystack = haystack-- + 1;
rneedle = needle;
a = _tolower (*rneedle);
a = TOLOWER (*rneedle);
if (_tolower (*rhaystack) == (int) a)
if (TOLOWER (*rhaystack) == (int) a)
do
{
if (a == '\0')
goto foundneedle;
++rhaystack;
a = _tolower (*++needle);
if (_tolower (*rhaystack) != (int) a)
a = TOLOWER (*++needle);
if (TOLOWER (*rhaystack) != (int) a)
break;
if (a == '\0')
goto foundneedle;
++rhaystack;
a = _tolower (*++needle);
a = TOLOWER (*++needle);
}
while (_tolower (*rhaystack) == (int) a);
while (TOLOWER (*rhaystack) == (int) a);
needle = rneedle; /* took the register-poor approach */