ISALPHARUNE(2) ISALPHARUNE(2) NAME isalpharune, islowerrune, isspacerune, istitlerune, isupperrune, isdigitrune, 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) int isdigitrune(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 ctype(2) 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. If a rune contains a value that is not a valid codepoint (ie, greater than Runemax), these routines return 0. SOURCE /sys/src/libc/port/mkrunetype.c /sys/src/libc/port/runeistype.c /sys/src/libc/port/runetotype.c SEE ALSO ctype(2), The Unicode Standard. Page 1 Plan 9 (printed 12/23/24)