ref: b3dc2af6d671b6311ccfc8a5f053dc85151cb7ed
dir: /sys/src/cmd/ktrans/main.c/
/*
* Mostly based on the original source codes of Plan 9 release 2
* distribution.
* by Kenji Okamoto, August 4 2000
* Osaka Prefecture Univ.
* okamoto@granite.cias.osakafu-u.ac.jp
*/
/*
* A glossary on some of the Japanese vocabulary used:
* kana: syllabic letting, either hiragana(ひらがな) or katakana(カタカナ)
* kanji(漢字): borrowed characters, 楽 in 楽しい
* Okurigana(送り仮名): kana tail to kanji, しい in 楽しい
* Joshi(助詞): particle, は in 私は
* Jisho(辞書): dictionary
* kouho(候補): candidate
*/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "hash.h"
#include "ktrans.h"
#define LSIZE 256
Rune lbuf[LSIZE]; /* hiragana buffer for key input written by send() */
Hmap *table;
uchar okurigana[LSIZE]; /* buffer for okurigana */
char okuri = 0; /* buffer/flag for capital input char */
int in, out;
int llen, olen, joshi = 0;
int natural = 1; /* not Japanese but English mode */
int changelang(int);
int dotrans(Hmap*);
int nrune(char *);
void send(uchar *, int);
Hmap* opendict(Hmap *, char *);
void
kbdopen(void)
{
int n, kinfd, koutfd, fd[2];
char buf[128];
int kbd;
kbd = 1;
if((kinfd = open("/dev/kbd", OREAD)) < 0){
kbd = 0;
if((kinfd = open("/dev/cons", OREAD)) < 0)
sysfatal("open kbd: %r");
}
if(bind("#|", "/n/temp", MREPL) < 0)
sysfatal("bind /n/temp: %r");
if((koutfd = open("/n/temp/data1", OWRITE)) < 0)
sysfatal("open kbd pipe: %r");
if(bind("/n/temp/data", kbd? "/dev/kbd": "/dev/cons", MREPL) < 0)
sysfatal("bind kbd pipe: %r");
unmount(nil, "/n/temp");
if(!kbd){
in = kinfd;
out = koutfd;
return;
}
if(pipe(fd) < 0)
sysfatal("pipe: %r");
if(fork()){
in = out = fd[0];
close(fd[1]);
close(kinfd);
close(koutfd);
return;
}
close(fd[0]);
if(fork()){
Biobuf b;
long r;
Binit(&b, fd[1], OREAD);
while((r = Bgetrune(&b)) >= 0){
n = snprint(buf, sizeof(buf), "c%C", (Rune)r)+1;
write(koutfd, buf, n); /* pass on result */
}
} else
while((n = read(kinfd, buf, sizeof(buf))) > 0){
buf[n-1] = 0;
if(n < 2 || buf[0] != 'c')
write(koutfd, buf, n); /* pass on */
else
write(fd[1], buf+1, n-2); /* to translator */
}
exits(nil);
}
Map signalmore = {
"_", nil, 1,
};
Hmap*
initmap(Map *m, int n)
{
int i, j;
char buf[16];
char *s;
Map prev;
Hmap *h;
h = hmapalloc(n, sizeof(Map));
for(i = 0; i < n; i++){
if(m[i].roma == nil || m[i].roma[0] == '\0')
continue;
//We mark all partial strings so we know when
//we have partial match when ingesting.
j = 2;
for(s = m[i].roma; *s && j <= sizeof buf; s++){
snprint(buf, j, "%s", m[i].roma);
prev = m[i];
if(hmapget(h, buf, &prev) == 0){
if(prev.leadstomore == 1 && s[1] == '\0'){
//confict; partial & valid input
prev = m[i];
prev.leadstomore = 1;
}
}
if(s[1] == '\0'){
hmaprepl(&h, strdup(buf), &prev, nil, 1);
} else {
hmaprepl(&h, strdup(buf), &signalmore, nil, 1);
}
j++;
}
}
return h;
}
void
usage(void)
{
fprint(2, "usage: %s\n", argv0);
exits("usage");
}
void
main(int argc, char *argv[])
{
uchar *bp, *ep, buf[128];
Map lkup, last;
int wantmore;
int n, c;
char *jishoname, *zidianname;
Hmap *jisho, *zidian;
ARGBEGIN{
default: usage();
}ARGEND;
if(argc != 0)
usage();
if((jishoname = getenv("jisho")) == nil)
jishoname = "/lib/kanji.jisho";
jisho = opendict(nil, jishoname);
if((zidianname = getenv("zidian")) == nil)
zidianname = "/lib/hanzi.zidian";
zidian = opendict(nil, zidianname);
hira = table = initmap(mhira, nelem(mhira));
kata = initmap(mkata, nelem(mkata));
greek = initmap(mgreek, nelem(mgreek));
cyril = initmap(mcyril, nelem(mcyril));
hangul = initmap(mhangul, nelem(mhangul));
last = (Map){nil, nil, -1};
kbdopen();
if(fork())
exits(nil); /* parent process will exit */
bp = ep = buf;
wantmore = 0;
for (;;) { /* key board input loop */
getmore:
if (bp>=ep || wantmore) {
if (wantmore==0)
bp = ep = buf; /* clear all */
n = read(in, ep, &buf[sizeof(buf)]-ep);
if (n<=0)
exits("");
ep += n;
*ep = '\0';
}
while (bp<ep) { /* there are input data */
if (table == hira && natural != 1 && (*bp>'A' && *bp<='Z') && ep-bp<2
&& !strchr("EIOU", *bp)) {
wantmore = 1;
goto getmore;
}
if (!fullrune((char *)bp, ep-bp)) { /* not enough length of input */
wantmore = 1;
goto getmore;
}
wantmore = 0;
if (*bp=='') { /* ^x read ktrans-jisho once more */
jisho = opendict(jisho, jishoname);
zidian = opendict(zidian, zidianname);
llen = 0;
olen = okuri = joshi = 0;
wantmore=0;
bp=ep=buf;
continue;
}
if (*bp==' ') { /* ^\ (start translation command) */
if (table == hanzi)
c = dotrans(zidian);
else
c = dotrans(jisho);
if (c)
*bp = c; /* pointer to translated rune */
else
bp++;
continue;
}
if (*bp==' ') { /* ^l (no translate command) */
bp++;
llen = 0;
olen = okuri = joshi = 0;
last.kana = nil;
continue;
}
if (changelang(*bp)) { /* change language mode OK */
bp++;
olen = okuri = joshi = 0;
last.kana = nil;
continue;
}
if (natural || *bp<=' ' || *bp>='{') { /* English mode but not ascii */
Rune r;
int rlen = chartorune(&r, (char *)bp);
send(bp, rlen); /* write bp to /dev/cons */
bp += rlen;
last.kana = nil;
continue;
}
if (table == hira && (*bp >= 'A' && *bp <= 'Z') && (*(bp+1) < 'A'
|| *(bp+1) > 'Z')) {
*bp = okuri = tolower(*bp);
joshi = olen = 0;
} else if (table == hira && (*bp >= 'A' && *bp <= 'Z') &&
(*(bp+1) >= 'A' && *(bp+1) <= 'Z')) {
*bp = okuri = tolower(*bp);
*(bp+1) = tolower(*(bp+1));
joshi = 1;
olen = 0;
}
if(hmapget(table, (char*)bp, &lkup) < 0){
if(last.kana != nil){
send((uchar*)last.kana, strlen(last.kana));
bp += strlen(last.roma);
} else
send(bp++, 1);
last.kana = nil;
break;
}
/* concatinations; only advance a single character */
if(lkup.kana != nil && strstr("ッっ", lkup.kana))
lkup.roma = "_";
/* partial match */
if(lkup.kana == nil || lkup.leadstomore == 1){
if(lkup.kana != nil)
last = lkup;
wantmore = 1;
break;
}
last.kana = nil;
send((uchar*)lkup.kana, strlen(lkup.kana));
bp += strlen(lkup.roma);
}
}
}
/*
* send UTF string (p) with length (n) to stdout
* and write rune (r) in global lbuf[] buffer
* or okurigana[] buffer if okuri (verb or joshi) mode
*/
void
send(uchar *p, int n)
{
Rune r;
uchar *ep;
if (write(out, (char*)p, n) != n)
sysfatal("write: %r");
if (llen>LSIZE-64) {
memmove((char*)lbuf, (char*)lbuf+64, 64*sizeof(Rune));
llen -= 64;
}
if(table != hira && table != hanzi)
return;
if(natural && table != hanzi)
return;
ep = p+n;
if(okuri)
while (olen<LSIZE && p<ep)
okurigana[olen++] = *p++;
else
while (llen<LSIZE && p<ep) {
p += chartorune(&r, (char*)p);
if (r=='\b') {
if (llen>0)
llen--;
continue;
}
if (r==0x80) /* ignore view key */
continue;
lbuf[llen++] = r;
}
}
int
changelang(int c)
{
switch(c){
case '': /* ^t (English mode) */
natural = 1;
table = hira;
llen = 0;
return 1;
break;
case '': /* ^n (Japanese hiragana mode ) */
natural = 0;
table = hira;
llen = 0;
return 1;
break;
case ' ': /* ^k (Japanese katakana mode) */
natural = 0;
table = kata;
llen = 0;
return 1;
break;
case '': /* ^r (Russian mode) */
natural = 0;
table = cyril;
llen = 0;
return 1;
break;
case '': /* ^o (Greek mode) */
natural = 0;
table = greek;
llen = 0;
return 1;
break;
case '': /* ^s (Korean mode) */
natural = 0;
table = hangul;
llen = 0;
return 1;
break;
case '': /* ^c (Chinese mode) */
natural = 1;
table = hanzi;
llen = 0;
return 1;
break;
}
return 0;
}
Hmap*
opendict(Hmap *h, char *name)
{
Biobuf *b;
char *p;
char *dot, *rest;
char *kouho[16];
int i;
b = Bopen(name, OREAD);
if(b == nil)
return nil;
if(h == nil)
h = hmapalloc(8192, sizeof(kouho));
else
hmapreset(h, 1);
while(p = Brdstr(b, '\n', 1)){
if(p[0] == '\0' || p[0] == ';'){
Err:
free(p);
continue;
}
dot = utfrune(p, '\t');
if(dot == nil)
goto Err;
*dot = '\0';
rest = dot+1;
if(*rest == '\0')
goto Err;
memset(kouho, 0, sizeof kouho);
i = 0;
while(i < nelem(kouho)-1 && (dot = utfrune(rest, ' '))){
*dot = '\0';
kouho[i++] = rest;
rest = dot+1;
}
if(i < nelem(kouho)-1)
kouho[i] = rest;
/* key is the base pointer; overwrites clean up for us */
hmaprepl(&h, p, kouho, nil, 1);
}
Bterm(b);
return h;
}
/*
* write translated kanji runes to stdout and return last character
* if it's not ctl-\. if the last is ctl-\, proceed with
* translation of the next kouho
*/
int
dotrans(Hmap *dic)
{
Rune *res, r[1];
char v[1024], *p, tbuf[64], hirabuf[64];
int j, lastlen, nokouho = 0;
char ch;
int i;
char *kouho[16];
if (llen==0)
return 0; /* don't use kanji transform function */
if (okuri && joshi != 1) {
lbuf[llen++] = (Rune)okuri;
lbuf[llen] = 0;
}else
lbuf[llen] = 0;
okurigana[olen] = 0;
/*
* search the matched index for the key word in the dict hash table, and
* return a pointer to the matched kouho, 0 otherwise.
*/
res = lbuf;
for (j=0; *res != L'\0'; j += runetochar(v+j, res++))
;
v[j] = '\0';
strcpy(tbuf, v);
strcpy(hirabuf, v); /* to remember the initial hiragana input */
if (okuri && joshi != 1) /* verb mode */
hirabuf[strlen(hirabuf) - 1] = '\0';
if(hmapget(dic, v, kouho) < 0){
llen = olen = okuri = joshi = 0;
okurigana[0] = 0;
return 0;
}
for(i = 0; i < nelem(kouho) && kouho[i] != nil; i++) {
p = kouho[i];
lastlen = nrune(tbuf); /* number of rune chars */
if (okuri && joshi != 1) /* verb mode */
for (j=0; j<lastlen-1; j++)
write(out, "\b", 1); /* clear hiragana input */
else
for (j=0; j<lastlen; j++)
write(out, "\b", 1); /* clear hiragana input */
if (okuri) {
lastlen = nrune((char *)okurigana);
for (j=0; j<lastlen; j++)
write(out, "\b", 1);
}
write(out, p, strlen(p)); /* write kanji to stdout */
if (okuri)
write(out, (char *)okurigana, olen);
if (read(in, &ch, 1)<=0) /* read from stdin */
exits(nil);
if (ch == ' ') { /* if next input is ^\, once again */
if(i+1 < nelem(kouho) && kouho[i+1] != nil) { /* have next kouho */
nokouho = 0;
strcpy(tbuf, p);
if (okuri && joshi != 1) /* verb mode */
for (j=0; j<nrune(tbuf); j++)
write(out, "\b", 1);
continue;
} else { /* the last kouho */
if (okuri) {
lastlen = nrune((char *)okurigana);
for (j=0; j<lastlen; j++)
write(out, "\b", 1);
}
for (lastlen=0; *p != 0; p += j) {
j = chartorune(r, p);
lastlen++;
}
for (j=0; j<lastlen; j++)
write(out, "\b", 1);
if(hirabuf[0])
write(out, hirabuf, strlen(hirabuf));
if(okurigana[0])
write(out, (char *)okurigana, olen);
olen = okuri = joshi = 0;
okurigana[0] = 0;
break;
}
} else {
if(!nokouho && i != 0){ /* learn the previous use of the kouho */
p = kouho[0];
kouho[0] = kouho[i];
kouho[i] = p;
hmapupd(&dic, v, kouho);
}
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;
}