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libc: strncasecmp that more closely matches strncmp

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This commit is contained in:
K. Lange 2018-10-12 15:55:18 +09:00
parent 399a1f2e0c
commit b5b2efd8da
1 changed files with 5 additions and 6 deletions
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11
libc/strings/strcasecmp.c
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@ -7,13 +7,12 @@ int strcasecmp(const char * s1, const char * s2) {
}
int strncasecmp(const char *s1, const char *s2, size_t n) {
size_t i = 0;
while (i < n && tolower(*s1) && tolower(*s2)) {
if (tolower(*s1) < tolower(*s2)) return -1;
if (tolower(*s1) > tolower(*s2)) return 1;
if (n == 0) return 0;
while (n-- && tolower(*s1) == tolower(*s2)) {
if (!n || !*s1) break;
s1++;
s2++;
i++;
}
return 0;
return (unsigned int)tolower(*s1) - (unsigned int)tolower(*s2);
}