low_str_strpbrk

Scan strings for characters in specified character sets. 
l_text	low_str_strpbrk ( 
		cl_text 		s1, 
		cl_text		set 
);

Return Value
Returns a pointer to the first occurrence of any character from @set in 
string @s1, or a NULL pointer if the two string arguments have no characters in common.
Parameters
s1

Null-terminated, searched string
set
Null-terminated character set
Remarks
The low_str_strpbrk function returns a pointer to the first occurrence of a character 
in string @s1 that belongs to the set of characters in @set. 
The search does not include the terminating null character.