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" .

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