mbrlen

 

C

Language

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Type support

Dynamic memory management

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Program utilities

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Numerics

Input/output support

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Atomic operations (C11)

 

Strings library

Byte strings

Multibyte strings

Wide strings

 

Null-terminated multibyte strings

Wide/multibyte conversions
mbsinit
mbtowc mbstowcs btowc mbrtowc mbsrtowcs mblen mbrtoc16 c16rtomb	wctomb wcstombs wctob wcrtomb wcsrtombs mbrlen mbrtoc32 c32rtomb
Types
mbstate_t

 

Defined in header <wchar.h>
size_t mbrlen( const char* s, size_t n, mbstate_t* ps );

Determines the size, in bytes, of the remainder of the multibyte character whose first byte is pointed to by s, given the current conversion state ps.

This function is equivalent to the call mbrtowc(nullptr, s, n, ps?ps:&internal) for some hidden object internal of type mbstate_t, except that the expression ps is evaluated only once.

Parameters

s	-	pointer to an element of a multibyte character string
n	-	limit on the number of bytes in s that can be examined
ps	-	pointer to the variable holding the conversion state

Return value

​0​ if the next n or fewer bytes complete the null character.

The number of bytes (between 1 and n) that complete a valid multibyte character

(size_t)-1 if encoding error occurs

(size_t)-2 if the next n bytes are part of a possibly valid multibyte character, which is still incomplete after examining all n bytes

See also

mbrtowc	converts the next multibyte character to wide character, given state (function)
mblen	returns the number of bytes in the next multibyte character (function)
C++ documentation for mbrlen