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