Scans a string for the first occurrence of a given substring.
#include <utf8.h> utf8_t *utf8str ( const utf8_t *as1, const utf8_t *as2);
(IN) Points to a null-terminated string to scan.
(IN) Points to a null-terminated substring for which to search.
Returns a pointer to the located string, or a NULL pointer if the string is not found.
The utf8str function locates the first occurrence in the as1 string of the sequence of characters (excluding the null-terminating character) in the string pointed to by as2.