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