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ICU-973 speed tweaks to u_strcmp() & u_strcmpCodePointOrder().

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X-SVN-Rev: 5204
This commit is contained in:
Andy Heninger 2001-07-09 19:44:54 +00:00
parent 0f4896e90b
commit 27b4977f7f
1 changed files with 10 additions and 18 deletions
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28
icu4c/source/common/ustring.c
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@ -318,18 +318,16 @@ int32_t
u_strcmp(const UChar *s1,
const UChar *s2)
{
int32_t rc;
UChar c1, c2;
for(;;) {
c1=*s1;
c2=*s2;
rc = (int32_t)c1 - (int32_t)c2;
if(rc != 0 || c1 == 0) {
return rc;
c1=*s1++;
c2=*s2++;
if (c1 != c2 || c1 == 0) {
break;
}
++s1;
++s2;
}
return (int32_t)c1 - (int32_t)c2;
}
/* rotate surrogates to the top to get code point order; assume c>=0xd800 */
@ -349,20 +347,14 @@ u_strcmpCodePointOrder(const UChar *s1, const UChar *s2) {
/* compare identical prefixes - they do not need to be fixed up */
for(;;) {
c1=*s1;
c2=*s2;
if(c1==c2) {
if(c1==0) {
return 0;
}
++s1;
++s2;
} else {
c1=*s1++;
c2=*s2++;
if (c1 != c2 || c1 == 0) {
break;
}
}
/* c1!=c2, fix up each one if they're both in or above the surrogate range, then compare them */
/* if both values are in or above the surrogate range, Fix them up. */
if (c1 >= 0xD800 && c2 >= 0xD800) {
UTF16FIXUP(c1);
UTF16FIXUP(c2);