CSET(3C) Standard C Library Functions CSET(3C)

NAME

cset, csetlen, csetcol, csetno, wcsetno - get information on EUC
codesets

SYNOPSIS

#include <euc.h>

int csetlen(int codeset);


int csetcol(int codeset);


int csetno(unsigned char c);


#include <widec.h>

int wcsetno(wchar_t pc);

DESCRIPTION

Both csetlen() and csetcol() take a code set number codeset, which
must be 0, 1, 2, or 3. The csetlen() function returns the number of
bytes needed to represent a character of the given Extended Unix Code
(EUC) code set, excluding the single-shift characters SS2 and SS3 for
codesets 2 and 3. The csetcol() function returns the number of
columns a character in the given EUC code set would take on the
display.


The csetno() function is implemented as a macro that returns a
codeset number (0, 1, 2, or 3) for the EUC character whose first byte
is c. For example,

#include <euc.h>
...
x+=csetcol(csetno(c));


increments a counter "x" (such as the cursor position) by the width
of the character whose first byte is c.


The wcsetno() function is implemented as a macro that returns a
codeset number (0, 1, 2, or 3) for the given process code character
pc. For example,

#include <euc.h>
#include <widec.h>
...
x+=csetcol(wcsetno(pc));


increments a counter "x" (such as the cursor position) by the width
of the Process Code character pc.

USAGE

These functions work only for the EUC locales.


The cset(), csetlen(), csetcol(), csetno(), and wcsetno() functions
can be used safely in multithreaded applications, as long as
setlocale(3C) is not being called to change the locale.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+-------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-------------------------+
|MT-Level | MT-Safe with exceptions |
+---------------+-------------------------+

SEE ALSO

euclen(3C), setlocale(3C), attributes(7)

June 18, 2021 CSET(3C)