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#include <string.h>
#include <ctype.h>
int strcasecmp(const char *_l, const char *_r)
{
const unsigned char *l=(void *)_l, *r=(void *)_r;
for (; *l && *r && (*l == *r || tolower(*l) == tolower(*r)); l++, r++);
return tolower(*l) - tolower(*r);
}
int strncasecmp(const char *_l, const char *_r, size_t n)
{
const unsigned char *l=(void *)_l, *r=(void *)_r;
if (!n--) return 0;
for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
return tolower(*l) - tolower(*r);
}
char *strcasestr(const char *h, const char *n)
{
size_t l = strlen(n);
for (; *h; h++) if (!strncasecmp(h, n, l)) return (char *)h;
return 0;
}
char *strtok_r(char *s, const char *sep, char **p)
{
if (!s && !(s = *p)) return NULL;
s += strspn(s, sep);
if (!*s) return *p = 0;
*p = s + strcspn(s, sep);
if (**p) *(*p)++ = 0;
else *p = 0;
return s;
}
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