_mbsbtype
Remonter à string.h - Index
Header File
mbstring.h
Category
Classification Routines
Prototype
int _mbsbtype(const unsigned char *str, size_t nbyte);
Description
The nbyte argument specifies the number of bytes from the start of the zero-based string.
The _mbsbtype function inspects the argument str to determine whether the byte at the position specified by nbyte is a single-byte character, or whether it is the leadbyte or trailing byte in a multibyte character. The _mbsbtype function can determine whether the byte pointed at is an invalid character or a NULL byte.
Any invalid bytes in str before nbyte are ignored.
Return Value
The value that _mbsbtype returns is one of the following manifest constants, defined in mbctype.h.
Example
#include <mbstring.h> #include <mbctype.h> int count_chars(char* input) { int type, i = 0, chars = 0; while (input[i]) { /* Obtain the type of the i-th char in the string */ type = _mbsbtype(input, i); /* Consider single and MBCS chars as whole chars */ switch (type) { case _MBC_LEAD: case _MBC_SINGLE: chars++; break; case _MBC_ILLEGAL: return -1; } i++; } /* The number of chars */ return chars; }