Scans a specified string for the initial segment not containing any subset of the given set of characters.
#include <unilib.h> size_t unicspn ( const unicode_t *string, const unicode_t *charset);
(IN) Points to the string to be scanned.
(IN) Points to the character set.
Returns the length of the initial segment of string, consisting entirely of characters not from charset.
The unicspn function corresponds to the strcspn function.