_ismbslead, _ismbstrail
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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.
Example
#include <mbstring.h> bool checkMBCSString(char* input) { char* ptr = input; /* Check if the given MBCS sequence is correct */ while (*ptr) { if (_ismbslead(input, ptr)) { /* The check succeeds for correct MBCS sequences */ if (!_ismbstrail(input, ptr + 1)) return false; } ptr++; } /* The check succeeded */ return true; }