02-20-2010
thank you for this, I didn't know how to proceed on getting multibyte chars
the masks are a good thing 2 know
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LEARN ABOUT OSX
multibyte
MULTIBYTE(3) BSD Library Functions Manual MULTIBYTE(3)
NAME
multibyte -- multibyte and wide character manipulation functions
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <limits.h>
#include <stdlib.h>
#include <wchar.h>
DESCRIPTION
The basic elements of some written natural languages, such as Chinese, cannot be represented uniquely with single C chars. The C standard
supports two different ways of dealing with extended natural language encodings: wide characters and multibyte characters. Wide characters
are an internal representation which allows each basic element to map to a single object of type wchar_t. Multibyte characters are used for
input and output and code each basic element as a sequence of C chars. Individual basic elements may map into one or more (up to MB_LEN_MAX)
bytes in a multibyte character.
The current locale (setlocale(3)) governs the interpretation of wide and multibyte characters. The locale category LC_CTYPE specifically
controls this interpretation. The wchar_t type is wide enough to hold the largest value in the wide character representations for all
locales.
Multibyte strings may contain 'shift' indicators to switch to and from particular modes within the given representation. If explicit bytes
are used to signal shifting, these are not recognized as separate characters but are lumped with a neighboring character. There is always a
distinguished 'initial' shift state. Some functions (e.g., mblen(3), mbtowc(3) and wctomb(3)) maintain static shift state internally,
whereas others store it in an mbstate_t object passed by the caller. Shift states are undefined after a call to setlocale(3) with the
LC_CTYPE or LC_ALL categories.
For convenience in processing, the wide character with value 0 (the null wide character) is recognized as the wide character string termina-
tor, and the character with value 0 (the null byte) is recognized as the multibyte character string terminator. Null bytes are not permitted
within multibyte characters.
The C library provides the following functions for dealing with multibyte characters:
Function Description
mblen(3) get number of bytes in a character
mbrlen(3) get number of bytes in a character (restartable)
mbrtowc(3) convert a character to a wide-character code (restartable)
mbsrtowcs(3) convert a character string to a wide-character string (restartable)
mbstowcs(3) convert a character string to a wide-character string
mbtowc(3) convert a character to a wide-character code
wcrtomb(3) convert a wide-character code to a character (restartable)
wcstombs(3) convert a wide-character string to a character string
wcsrtombs(3) convert a wide-character string to a character string (restartable)
wctomb(3) convert a wide-character code to a character
SEE ALSO
mklocale(1), setlocale(3), stdio(3), big5(5), euc(5), gb18030(5), gb2312(5), gbk(5), mskanji(5), utf8(5)
STANDARDS
These functions conform to ISO/IEC 9899:1999 (``ISO C99'').
BSD
April 8, 2004 BSD