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/*
* open jisho file, and set the size of this jisho etc
*
* Kenji Okamoto August 4, 2000
* Osaka Prefecture Univ.
* okamoto@granite.cias.osakafu-u.ac.jp
*/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "jisho.h"
Dictionary *openQDIC(char *);
void freeQDIC(Dictionary*);
KouhoList *getKouhoHash(Dictionary*, char *);
KouhoList *getKouhoFile(DicList*, char *);
void selectKouho(KouhoList **, KouhoList*);
int hashVal(char *);
void addHash(Hash **, DicList*);
/*
* Open QuickDIC (hashed personal dictionary)
* open skk styled ktrans dictionary file, and make its hash table
* based on individual header kana strings
*
* KouhoList
* |---------|
* Hash |---->kouho---->kouhotop
* |-------| |
* dic---->dhash---->dicindex---->kanahead
* |--------| |--------|
* Dictionary DicList
*
*/
Dictionary *
openQDIC(char *dicname)
{
Biobuf *f;
void *Bbuf;
Dictionary *dic;
DicList *dicitem; /* for a future extension */
char buf[1024], *startstr, *endstr;
int i;
SET(dicitem); /* yes, I know I'm wrong, but... */
dic = (Dictionary*)malloc(sizeof(Dictionary));
/* make room for pointer array (size=HASHSIZE) of hash table */
for(i=0; i< HASHSIZE; i++) dic->dhash[i] = 0;
dic->dlist = 0; /* for a future extension (more than one dics ^_^ */
if ((f = Bopen(dicname, OREAD)) == 0)
return dic;
/* make hash table by the dic's header word */
while(Bbuf = Brdline(f, '\n')) {
strncpy(buf, (char *)Bbuf, Blinelen(f));
if (buf[0] == ';') /* comment line */
continue;
else {
/* get header word from jisho */
startstr = buf;
if(!(endstr = utfutf(startstr, "\t"))) break;
*endstr = '\0';
/* dicitem includes each header word from the jisho */
dicitem = (DicList*)malloc(sizeof(DicList)+(endstr-startstr+1));
dicitem->nextitem = 0; /* for a future extension */
strcpy(dicitem->kanahead, startstr);
dicitem->kouho = getKouhoFile(dicitem, endstr); /* read kouho from jisho */
addHash(dic->dhash, dicitem);
}
continue;
}
dic->dlist = dicitem;
Bterm(f);
return dic;
}
/*
* free dynamically allocated memory
*/
void
freeQDIC(Dictionary *dic)
{
Hash *hash1, *hash2;
DicList *dlist, *dlist2;
int l;
for (dlist = dic->dlist;
dlist != 0;
dlist2 = dlist, dlist = dlist->nextitem, free((void *)dlist2));
for (l = 0; l < HASHSIZE; l++) {
for (hash1 = dic->dhash[l]; hash1; hash1 = hash2) {
if (hash1->next !=0) {
hash2 = hash1->next;
free((void *)hash1);
}else
break;
}
}
free((void *)dic);
}
int
hashVal(char *s)
{
uint h;
h = 0x811c9dc5;
while(*s != 0)
h = (h^(uchar)*s++) * 0x1000193;
return h % HASHSIZE;
}
void
addHash(Hash **hash, DicList *ditem)
{
Hash *h;
int v;
v = hashVal(ditem->kanahead);
h = (Hash*)malloc(sizeof(Hash));
h->dicindex = ditem;
h->length = strlen(ditem->kanahead);
h->next = hash[v];
hash[v] = h;
}
/*
* read Kouho list from the jisho file defined by Biobuf descriptor f
*
* revised for Plan 9 by K.Okamoto
*/
KouhoList *
getKouhoFile(DicList *dicitem, char * endstr)
{
char *kouhostart, *kouhoend;
KouhoList *kouhoitem, *currntkouhoitem=0, *prevkouhoitem;
prevkouhoitem = 0;
kouhostart = endstr + 1;
while((kouhoend = utfutf(kouhostart, " ")) ||
(kouhoend = utfutf(kouhostart, "\n"))) {
*kouhoend = '\0';
kouhoitem = (KouhoList*)malloc(sizeof(KouhoList)+(kouhoend-kouhostart+1));
kouhoitem->nextkouho = 0;
kouhoitem->prevkouho = prevkouhoitem;
kouhoitem->dicitem = dicitem;
strcpy(kouhoitem->kouhotop, kouhostart);
if (prevkouhoitem)
prevkouhoitem->nextkouho = kouhoitem;
else
currntkouhoitem = kouhoitem;
prevkouhoitem = kouhoitem;
kouhostart = kouhoend + 1;
}
return currntkouhoitem;
}
/*
* get matched kouho from the hash table of header word of the dict
* if found, returns pointer to the first candidate in the hash table.
* if not found, returns 0.
*
* from getCand() in skklib.c by Akinori Ito et al.,(aito@ei5sun.yz.yamagata-u.ac.jp)
*/
KouhoList *
getKouhoHash(Dictionary *dic, char *s)
{
int l, v;
Hash *h;
l = strlen(s);
v = hashVal(s);
for (h = dic->dhash[v]; h != 0; h = h->next) {
if (h->length != l ||
strcmp(h->dicindex->kanahead, s)) continue;
return h->dicindex->kouho; /* return matched kouho */
}
return 0;
}
/*
* from skklib.c by Akinori Ito et al.,(aito@ei5sun.yz.yamagata-u.ac.jp)
* just modified to read easier for current purpose
*/
void
selectKouho(KouhoList **first, KouhoList *current)
{
/* take off currentkouho from the kouholist table */
if (current->prevkouho) {
current->prevkouho->nextkouho = current->nextkouho;
if (current->nextkouho)
current->nextkouho->prevkouho = current->prevkouho;
current->prevkouho = 0;
}
/* take place of firstkouho by currentkouho */
if (*first != current) {
(*first)->prevkouho = current;
current->nextkouho = *first;
*first = current;
}
}
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