55 lines
1.1 KiB
Text
55 lines
1.1 KiB
Text
|
.TH ISALPHARUNE 2
|
||
|
|
.SH NAME
|
||
|
|
isalpharune, islowerrune, isspacerune, istitlerune, isupperrune, isdigitrune, tolowerrune, totitlerune, toupperrune \- Unicode character classes and cases
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.B #include <u.h>
|
||
|
|
.br
|
||
|
|
.B #include <libc.h>
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int isalpharune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int islowerrune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int isspacerune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int istitlerune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int isupperrune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
int isdigitrune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
Rune tolowerrune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
Rune totitlerune(Rune c)
|
||
|
|
.PP
|
||
|
|
.B
|
||
|
|
Rune toupperrune(Rune c)
|
||
|
|
.SH DESCRIPTION
|
||
|
|
These routines examine and operate on Unicode characters,
|
||
|
|
in particular a subset of their properties as defined in the Unicode standard.
|
||
|
|
Unicode defines some characters as alphabetic and specifies three cases:
|
||
|
|
upper, lower, and title.
|
||
|
|
Analogously to
|
||
|
|
.IR ctype (2)
|
||
|
|
for
|
||
|
|
.SM ASCII\c
|
||
|
|
,
|
||
|
|
these routines
|
||
|
|
test types and modify cases for Unicode characters.
|
||
|
|
The names are self-explanatory.
|
||
|
|
.PP
|
||
|
|
The case-conversion routines return the character unchanged if it has no case.
|
||
|
|
.SH SOURCE
|
||
|
|
.B /sys/src/libc/port/runetype.c
|
||
|
|
.SH "SEE ALSO
|
||
|
|
.IR ctype (2) ,
|
||
|
|
.IR "The Unicode Standard" .
|