567 lines
11 KiB
C
567 lines
11 KiB
C
/*
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* Mostly based on the original source codes of Plan 9 release 2
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* distribution.
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* by Kenji Okamoto, August 4 2000
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* Osaka Prefecture Univ.
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* okamoto@granite.cias.osakafu-u.ac.jp
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*/
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/*
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* A glossary on some of the Japanese vocabulary used:
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* kana: syllabic letting, either hiragana(ひらがな) or katakana(カタカナ)
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* kanji(漢字): borrowed characters, 楽 in 楽しい
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* Okurigana(送り仮名): kana tail to kanji, しい in 楽しい
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* Joshi(助詞): particle, は in 私は
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* Jisho(辞書): dictionary
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* kouho(候補): candidate
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*/
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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include "hash.h"
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#include "ktrans.h"
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#define LSIZE 256
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Rune lbuf[LSIZE]; /* hiragana buffer for key input written by send() */
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Hmap *table;
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uchar okurigana[LSIZE]; /* buffer for okurigana */
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char okuri = 0; /* buffer/flag for capital input char */
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int in, out;
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int llen, olen, joshi = 0;
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int natural = 1; /* not Japanese but English mode */
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int changelang(int);
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int dotrans(Hmap*);
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int nrune(char *);
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void send(uchar *, int);
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Hmap* opendict(Hmap *, char *);
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void
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kbdopen(void)
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{
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int n, kinfd, koutfd, fd[2];
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char buf[128];
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int kbd;
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kbd = 1;
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if((kinfd = open("/dev/kbd", OREAD)) < 0){
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kbd = 0;
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if((kinfd = open("/dev/cons", OREAD)) < 0)
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sysfatal("open kbd: %r");
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}
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if(bind("#|", "/n/temp", MREPL) < 0)
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sysfatal("bind /n/temp: %r");
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if((koutfd = open("/n/temp/data1", OWRITE)) < 0)
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sysfatal("open kbd pipe: %r");
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if(bind("/n/temp/data", kbd? "/dev/kbd": "/dev/cons", MREPL) < 0)
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sysfatal("bind kbd pipe: %r");
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unmount(nil, "/n/temp");
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if(!kbd){
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in = kinfd;
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out = koutfd;
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return;
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}
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if(pipe(fd) < 0)
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sysfatal("pipe: %r");
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if(fork()){
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in = out = fd[0];
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close(fd[1]);
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close(kinfd);
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close(koutfd);
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return;
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}
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close(fd[0]);
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if(fork()){
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Biobuf b;
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long r;
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Binit(&b, fd[1], OREAD);
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while((r = Bgetrune(&b)) >= 0){
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n = snprint(buf, sizeof(buf), "c%C", (Rune)r)+1;
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write(koutfd, buf, n); /* pass on result */
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}
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} else
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while((n = read(kinfd, buf, sizeof(buf))) > 0){
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buf[n-1] = 0;
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if(n < 2 || buf[0] != 'c')
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write(koutfd, buf, n); /* pass on */
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else
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write(fd[1], buf+1, n-2); /* to translator */
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}
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exits(nil);
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}
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Map signalmore = {
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"_", nil, 1,
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};
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Hmap*
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initmap(Map *m, int n)
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{
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int i, j;
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char buf[16];
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char *s;
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Map prev;
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Hmap *h;
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h = hmapalloc(n, sizeof(Map));
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for(i = 0; i < n; i++){
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if(m[i].roma == nil || m[i].roma[0] == '\0')
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continue;
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//We mark all partial strings so we know when
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//we have partial match when ingesting.
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j = 2;
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for(s = m[i].roma; *s && j <= sizeof buf; s++){
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snprint(buf, j, "%s", m[i].roma);
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prev = m[i];
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if(hmapget(h, buf, &prev) == 0){
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if(prev.leadstomore == 1 && s[1] == '\0'){
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//confict; partial & valid input
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prev = m[i];
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prev.leadstomore = 1;
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free(hmapkey(h, buf));
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}
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}
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if(s[1] == '\0'){
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hmapset(&h, strdup(buf), &prev, nil);
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} else {
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hmapset(&h, strdup(buf), &signalmore, nil);
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}
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j++;
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}
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}
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return h;
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}
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void
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usage(void)
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{
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fprint(2, "usage: %s\n", argv0);
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exits("usage");
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}
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void
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main(int argc, char *argv[])
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{
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uchar *bp, *ep, buf[128];
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Map lkup, last;
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int wantmore;
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int n, c;
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char *jishoname, *zidianname;
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Hmap *jisho, *zidian;
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ARGBEGIN{
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default: usage();
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}ARGEND;
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if(argc != 0)
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usage();
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if((jishoname = getenv("jisho")) == nil)
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jishoname = "/lib/kanji.jisho";
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jisho = opendict(nil, jishoname);
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if((zidianname = getenv("zidian")) == nil)
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zidianname = "/lib/hanzi.zidian";
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zidian = opendict(nil, zidianname);
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hira = table = initmap(mhira, nelem(mhira));
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kata = initmap(mkata, nelem(mkata));
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greek = initmap(mgreek, nelem(mgreek));
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cyril = initmap(mcyril, nelem(mcyril));
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hangul = initmap(mhangul, nelem(mhangul));
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last = (Map){nil, nil, -1};
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kbdopen();
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if(fork())
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exits(nil); /* parent process will exit */
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bp = ep = buf;
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wantmore = 0;
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for (;;) { /* key board input loop */
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getmore:
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if (bp>=ep || wantmore) {
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if (wantmore==0)
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bp = ep = buf; /* clear all */
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n = read(in, ep, &buf[sizeof(buf)]-ep);
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if (n<=0)
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exits("");
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ep += n;
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*ep = '\0';
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}
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while (bp<ep) { /* there are input data */
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if (table == hira && natural != 1 && (*bp>'A' && *bp<='Z') && ep-bp<2
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&& !strchr("EIOU", *bp)) {
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wantmore = 1;
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goto getmore;
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}
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if (!fullrune((char *)bp, ep-bp)) { /* not enough length of input */
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wantmore = 1;
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goto getmore;
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}
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wantmore = 0;
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if (*bp=='') { /* ^x read ktrans-jisho once more */
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jisho = opendict(jisho, jishoname);
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zidian = opendict(zidian, zidianname);
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llen = 0;
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olen = okuri = joshi = 0;
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wantmore=0;
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bp=ep=buf;
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continue;
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}
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if (*bp==' ') { /* ^\ (start translation command) */
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if (table == hanzi)
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c = dotrans(zidian);
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else
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c = dotrans(jisho);
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if (c)
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*bp = c; /* pointer to translated rune */
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else
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bp++;
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continue;
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}
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if (*bp==' ') { /* ^l (no translate command) */
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bp++;
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llen = 0;
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olen = okuri = joshi = 0;
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last.kana = nil;
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continue;
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}
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if (changelang(*bp)) { /* change language mode OK */
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bp++;
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olen = okuri = joshi = 0;
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last.kana = nil;
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continue;
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}
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if (natural || *bp<=' ' || *bp>='{') { /* English mode but not ascii */
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Rune r;
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int rlen = chartorune(&r, (char *)bp);
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send(bp, rlen); /* write bp to /dev/cons */
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bp += rlen;
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last.kana = nil;
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continue;
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}
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if (table == hira && (*bp >= 'A' && *bp <= 'Z') && (*(bp+1) < 'A'
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|| *(bp+1) > 'Z')) {
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*bp = okuri = tolower(*bp);
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joshi = olen = 0;
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} else if (table == hira && (*bp >= 'A' && *bp <= 'Z') &&
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(*(bp+1) >= 'A' && *(bp+1) <= 'Z')) {
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*bp = okuri = tolower(*bp);
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*(bp+1) = tolower(*(bp+1));
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joshi = 1;
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olen = 0;
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}
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if(hmapget(table, (char*)bp, &lkup) < 0){
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if(last.kana != nil){
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send((uchar*)last.kana, strlen(last.kana));
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bp += strlen(last.roma);
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} else
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send(bp++, 1);
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last.kana = nil;
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break;
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}
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/* concatinations; only advance a single character */
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if(lkup.kana != nil && strstr("ッっ", lkup.kana))
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lkup.roma = "_";
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/* partial match */
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if(lkup.kana == nil || lkup.leadstomore == 1){
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if(lkup.kana != nil)
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last = lkup;
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wantmore = 1;
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break;
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}
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last.kana = nil;
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send((uchar*)lkup.kana, strlen(lkup.kana));
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bp += strlen(lkup.roma);
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}
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}
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}
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/*
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* send UTF string (p) with length (n) to stdout
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* and write rune (r) in global lbuf[] buffer
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* or okurigana[] buffer if okuri (verb or joshi) mode
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*/
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void
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send(uchar *p, int n)
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{
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Rune r;
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uchar *ep;
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if (write(out, (char*)p, n) != n)
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sysfatal("write: %r");
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if (llen>LSIZE-64) {
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memmove((char*)lbuf, (char*)lbuf+64, 64*sizeof(Rune));
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llen -= 64;
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}
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if(table != hira && table != hanzi)
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return;
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if(natural && table != hanzi)
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return;
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ep = p+n;
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if(okuri)
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while (olen<LSIZE && p<ep)
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okurigana[olen++] = *p++;
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else
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while (llen<LSIZE && p<ep) {
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p += chartorune(&r, (char*)p);
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if (r=='\b') {
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if (llen>0)
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llen--;
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continue;
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}
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if (r==0x80) /* ignore view key */
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continue;
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lbuf[llen++] = r;
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}
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}
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int
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changelang(int c)
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{
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switch(c){
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case '': /* ^t (English mode) */
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natural = 1;
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table = hira;
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llen = 0;
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return 1;
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break;
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case '': /* ^n (Japanese hiragana mode ) */
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natural = 0;
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table = hira;
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llen = 0;
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return 1;
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break;
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case ' ': /* ^k (Japanese katakana mode) */
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natural = 0;
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table = kata;
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llen = 0;
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return 1;
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break;
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case '': /* ^r (Russian mode) */
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natural = 0;
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table = cyril;
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llen = 0;
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return 1;
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break;
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case '': /* ^o (Greek mode) */
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natural = 0;
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table = greek;
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llen = 0;
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return 1;
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break;
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case '': /* ^s (Korean mode) */
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natural = 0;
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table = hangul;
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llen = 0;
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return 1;
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break;
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case '': /* ^c (Chinese mode) */
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natural = 1;
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table = hanzi;
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llen = 0;
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return 1;
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break;
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}
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return 0;
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}
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Hmap*
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opendict(Hmap *h, char *name)
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{
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Biobuf *b;
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char *p;
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char *dot, *rest;
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char *kouho[16];
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int i;
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b = Bopen(name, OREAD);
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if(b == nil)
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return nil;
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if(h == nil)
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h = hmapalloc(8192, sizeof(kouho));
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else
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hmapreset(h, 1);
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while(p = Brdstr(b, '\n', 1)){
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if(p[0] == '\0' || p[0] == ';'){
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Err:
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free(p);
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continue;
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}
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dot = utfrune(p, '\t');
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if(dot == nil)
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goto Err;
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*dot = '\0';
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rest = dot+1;
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if(*rest == '\0')
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goto Err;
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memset(kouho, 0, sizeof kouho);
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i = 0;
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while(i < nelem(kouho)-1 && (dot = utfrune(rest, ' '))){
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*dot = '\0';
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kouho[i++] = rest;
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rest = dot+1;
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}
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if(i < nelem(kouho)-1)
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kouho[i] = rest;
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/* key is the base pointer; overwrites clean up for us */
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hmapset(&h, p, kouho, nil);
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}
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Bterm(b);
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return h;
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}
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/*
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* write translated kanji runes to stdout and return last character
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* if it's not ctl-\. if the last is ctl-\, proceed with
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* translation of the next kouho
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*/
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int
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dotrans(Hmap *dic)
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{
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Rune *res, r[1];
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char v[1024], *p, tbuf[64], hirabuf[64];
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int j, lastlen, nokouho = 0;
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char ch;
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int i;
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char *kouho[16];
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if (llen==0)
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return 0; /* don't use kanji transform function */
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if (okuri && joshi != 1) {
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lbuf[llen++] = (Rune)okuri;
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lbuf[llen] = 0;
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}else
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lbuf[llen] = 0;
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okurigana[olen] = 0;
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/*
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* search the matched index for the key word in the dict hash table, and
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* return a pointer to the matched kouho, 0 otherwise.
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*/
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res = lbuf;
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for (j=0; *res != L'\0'; j += runetochar(v+j, res++))
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;
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v[j] = '\0';
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strcpy(tbuf, v);
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strcpy(hirabuf, v); /* to remember the initial hiragana input */
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if (okuri && joshi != 1) /* verb mode */
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hirabuf[strlen(hirabuf) - 1] = '\0';
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if(hmapget(dic, v, kouho) < 0){
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llen = olen = okuri = joshi = 0;
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okurigana[0] = 0;
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return 0;
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}
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for(i = 0; i < nelem(kouho) && kouho[i] != nil; i++) {
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p = kouho[i];
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lastlen = nrune(tbuf); /* number of rune chars */
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if (okuri && joshi != 1) /* verb mode */
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for (j=0; j<lastlen-1; j++)
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write(out, "\b", 1); /* clear hiragana input */
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else
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for (j=0; j<lastlen; j++)
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write(out, "\b", 1); /* clear hiragana input */
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if (okuri) {
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lastlen = nrune((char *)okurigana);
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for (j=0; j<lastlen; j++)
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write(out, "\b", 1);
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}
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write(out, p, strlen(p)); /* write kanji to stdout */
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if (okuri)
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write(out, (char *)okurigana, olen);
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if (read(in, &ch, 1)<=0) /* read from stdin */
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exits(nil);
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if (ch == ' ') { /* if next input is ^\, once again */
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if(i+1 < nelem(kouho) && kouho[i+1] != nil) { /* have next kouho */
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nokouho = 0;
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strcpy(tbuf, p);
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if (okuri && joshi != 1) /* verb mode */
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for (j=0; j<nrune(tbuf); j++)
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write(out, "\b", 1);
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continue;
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} else { /* the last kouho */
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if (okuri) {
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lastlen = nrune((char *)okurigana);
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for (j=0; j<lastlen; j++)
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write(out, "\b", 1);
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}
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for (lastlen=0; *p != 0; p += j) {
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j = chartorune(r, p);
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lastlen++;
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}
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for (j=0; j<lastlen; j++)
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write(out, "\b", 1);
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if(hirabuf[0])
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write(out, hirabuf, strlen(hirabuf));
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if(okurigana[0])
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write(out, (char *)okurigana, olen);
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olen = okuri = joshi = 0;
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okurigana[0] = 0;
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break;
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}
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} else {
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if(!nokouho && i != 0){ /* learn the previous use of the kouho */
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p = kouho[0];
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kouho[0] = kouho[i];
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kouho[i] = p;
|
||
hmapset(&dic, hmapkey(dic, v), kouho, nil);
|
||
}
|
||
|
||
olen = okuri = joshi = 0;
|
||
okurigana[0] = 0;
|
||
break;
|
||
}
|
||
}
|
||
llen = 0;
|
||
return ch;
|
||
}
|
||
|
||
/*
|
||
* returns the number of characters in the pointed Rune
|
||
*/
|
||
int
|
||
nrune(char *p)
|
||
{
|
||
int n = 0;
|
||
Rune r;
|
||
|
||
while (*p) {
|
||
p += chartorune(&r, p);
|
||
n++;
|
||
}
|
||
return n;
|
||
}
|