#pragma once

typedef uint32 rune;

/*
 * we have to use the preprocessor to ensure we have unsigned constants.
 */

#define UTFmax   4
#define RuneSync 0x80u
#define RuneSelf 0x80u
#define RuneErr  0xFFFDu
#define RuneMax  0x10FFFFu
#define RuneMask 0x1FFFFFu

/*
 * UTF-8 functions.
 */
int     utf8·len(char *s);            // returns number of runes
int     utf8·runelen(rune r);         // returns number of bytes for rune

int     utf8·decode(char *, rune *);  // decode 1 rune from char stream, store into rune, return number of bytes
int     utf8·encode(rune *, char *);  // encode 1 rune from rune stream, store into char, return number of bytes

char   *utf8·find(char *s, rune);     // find rune in char stream
char   *utf8·findlast(char* s, rune); // find last rune in char stream

int     utf8·canfit(char *, int); // XXX: odd function...

int     utf8·isletter(rune r);
int     utf8·isdigit(rune r);
int     utf8·isspace(rune r);
int     utf8·istitle(rune r);

rune    utf8·toupper(rune r);
rune    utf8·tolower(rune r);
rune    utf8·totitle(rune r);