'\" te
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.TH CSET 3C "June 18, 2021"
.SH NAME
cset, csetlen, csetcol, csetno, wcsetno \- get information on EUC codesets
.SH SYNOPSIS
.nf
#include <euc.h>

\fBint\fR \fBcsetlen\fR(\fBint\fR \fIcodeset\fR);
.fi

.LP
.nf
\fBint\fR \fBcsetcol\fR(\fBint\fR \fIcodeset\fR);
.fi

.LP
.nf
\fBint\fR \fBcsetno\fR(\fBunsigned char\fR \fIc\fR);
.fi

.LP
.nf
#include <widec.h>

\fBint\fR \fBwcsetno\fR(\fBwchar_t\fR \fIpc\fR);
.fi

.SH DESCRIPTION
Both \fBcsetlen()\fR and \fBcsetcol()\fR take a code set number \fIcodeset\fR,
which must be 0, 1, 2, or 3. The \fBcsetlen()\fR 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 \fBcsetcol()\fR function returns the number of columns a character in
the given \fBEUC\fR code set would take on the display.
.sp
.LP
The \fBcsetno()\fR function is implemented as a macro that returns a codeset
number (0, 1, 2, or 3) for the \fBEUC\fR character whose first byte is \fIc\fR.
For example,
.sp
.in +2
.nf
#include <euc.h>
\|.\|.\|.
x+=csetcol(csetno(c));
.fi
.in -2

.sp
.LP
increments a counter "x" (such as the cursor position) by the width of the
character whose first byte is \fIc\fR.
.sp
.LP
The \fBwcsetno()\fR function is implemented as a macro that returns a codeset
number (0, 1, 2, or 3) for the given process code character \fIpc\fR. For
example,
.sp
.in +2
.nf
#include <euc.h>
#include <widec.h>
\|.\|.\|.
x+=csetcol(wcsetno(pc));
.fi
.in -2

.sp
.LP
increments a counter "x" (such as the cursor position) by the width of the
Process Code character \fIpc\fR.
.SH USAGE
These functions work only for the EUC locales.
.sp
.LP
The \fBcset()\fR, \fBcsetlen()\fR, \fBcsetcol()\fR, \fBcsetno()\fR, and
\fBwcsetno()\fR functions can be used safely in multithreaded applications, as
long as \fBsetlocale\fR(3C) is not being called to change the locale.
.SH ATTRIBUTES
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
MT-Level	MT-Safe with exceptions
.TE

.SH SEE ALSO
\fBsetlocale\fR(3C), \fBeuclen\fR(3C), \fBattributes\fR(5)