ISALPHARUNE(3)                                     ISALPHARUNE(3)

     NAME
          isalpharune, islowerrune, isspacerune, istitlerune,
          isupperrune, tolowerrune, totitlerune, toupperrune - Unicode
          character classes and cases

     SYNOPSIS
          #include <u.h>
          #include <libc.h>

          int isalpharune(Rune c)

          int islowerrune(Rune c)

          int isspacerune(Rune c)

          int istitlerune(Rune c)

          int isupperrune(Rune c)

          Rune tolowerrune(Rune c)

          Rune totitlerune(Rune c)

          Rune toupperrune(Rune c)

     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 alpha-
          betic and specifies three cases: upper, lower, and title.
          Analogously to isalpha(3) for ASCII, these routines test
          types and modify cases for Unicode characters.  The names
          are self-explanatory.

          The case-conversion routines return the character unchanged
          if it has no case.

     SOURCE
          /src/lib9/utf/runetype.c

     SEE ALSO
          isalpha(3), The Unicode Standard.