Header File 

mbstring.h 

Category 

Classification Routines 

Prototype 

int _ismbslead(const unsigned char *s1, const unsigned char *s2); 

int _ismbstrail(const unsigned char *s1, const unsigned char *s2); 

Description 

The _ismbslead and _ismbstrail functions test the s1 argument to determine whether the s2 argument is a pointer to the lead byte or the trail byte. The test is case-sensitive. 

Return Value 

The _ismbslead and _ismbstrail routines return -1 if s2 points to a lead byte or a trail byte, respectively. If the test is false, the routines return zero.