mbstring(3C)

NAME

mbstring, mbstowcs, wcstombs − multibyte string functions

SYNOPSIS

#include <stdlib.h>

size_t mbstowcs(wchar_t ∗pwcs, const char ∗s, size_t n);
size_t wcstombs(char ∗s, const wchar_t ∗pwcs, size_t n);

MT-LEVEL

MT-Safe with exceptions

DESCRIPTION

mbstowcs() converts a sequence of multibyte characters from the array pointed to by s into a sequence of corresponding wide character codes and stores these codes into the array pointed to by pwcs, stopping after n codes are stored or a code with value zero (a converted null character) is stored. If an invalid multibyte character is encountered, mbstowcs() returns (size_t) −1; otherwise, mbstowcs() returns the number of array elements modified, not including the terminating zero code, if any.

wcstombs() converts a sequence of wide character codes from the array pointed to by pwcs into a sequence of multibyte characters and stores these multibyte characters into the array pointed to by s, stopping if a multibyte character would exceed the limit of n total bytes or if a null character is stored. If a wide character code is encountered that does not correspond to a valid multibyte character, wcstombs() returns (size_t) −1; otherwise, wcstombs() returns the number of bytes modified, not including a terminating null character, if any. If s is a null pointer, wcstombs() returns the number of bytes required for the character array.

NOTES

mbstowcs and wcstombs can be used safely in a multi-thread application, as long as setlocale(3C) is not being called to change the locale.

SunOS 5.5/x86 — Last change: 23 May 1994

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