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lib/string.c: simplify stricmp()

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Removes 32 bytes on core2 with gcc 4.4.1:
   text    data     bss     dec     hex filename
   3196       0       0    3196     c7c lib/string-BEFORE.o
   3164       0       0    3164     c5c lib/string-AFTER.o

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
André Goddard Rosa 2010-03-05 13:43:11 -08:00 committed by Linus Torvalds
parent 8a6e25357d
commit a11d2b64e1
1 changed files with 15 additions and 19 deletions
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34
lib/string.c
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@ -36,25 +36,21 @@ int strnicmp(const char *s1, const char *s2, size_t len)
/* Yes, Virginia, it had better be unsigned */ /* Yes, Virginia, it had better be unsigned */
unsigned char c1, c2; unsigned char c1, c2;
c1 = c2 = 0; if (!len)
if (len) { return 0;
do {
c1 = *s1; do {
c2 = *s2; c1 = *s1++;
s1++; c2 = *s2++;
s2++; if (!c1 || !c2)
if (!c1) break;
break; if (c1 == c2)
if (!c2) continue;
break; c1 = tolower(c1);
if (c1 == c2) c2 = tolower(c2);
continue; if (c1 != c2)
c1 = tolower(c1); break;
c2 = tolower(c2); } while (--len);
if (c1 != c2)
break;
} while (--len);
}
return (int)c1 - (int)c2; return (int)c1 - (int)c2;
} }
EXPORT_SYMBOL(strnicmp); EXPORT_SYMBOL(strnicmp);