680 lines
19 KiB
C++
680 lines
19 KiB
C++
#include "license.hun"
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#include "license.mys"
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#include <cstdlib>
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#include <cstring>
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#include <cctype>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <cstdio>
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#include "hashmgr.hxx"
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#include "csutil.hxx"
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#if !defined(_MSC_VER)
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#include <unistd.h>
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using namespace std;
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#endif
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// build a hash table from a munched word list
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HashMgr::HashMgr(const char * tpath, const char * apath)
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{
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tablesize = 0;
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tableptr = NULL;
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flag_mode = FLAG_CHAR;
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complexprefixes = 0;
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utf8 = 0;
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numaliasf = 0;
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aliasf = NULL;
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numaliasm = 0;
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aliasm = NULL;
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load_config(apath);
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int ec = load_tables(tpath);
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if (ec) {
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/* error condition - what should we do here */
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fprintf(stderr,"Hash Manager Error : %d\n",ec);
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fflush(stderr);
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if (tableptr) {
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free(tableptr);
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}
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tablesize = 0;
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}
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}
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HashMgr::~HashMgr()
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{
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if (tableptr) {
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// now pass through hash table freeing up everything
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// go through column by column of the table
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for (int i=0; i < tablesize; i++) {
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struct hentry * pt = &tableptr[i];
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struct hentry * nt = NULL;
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if (pt) {
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if (pt->astr && !aliasf) free(pt->astr);
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if (pt->word) free(pt->word);
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if (pt->description && !aliasm) free(pt->description);
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pt = pt->next;
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}
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while(pt) {
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nt = pt->next;
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if (pt->astr && !aliasf) free(pt->astr);
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if (pt->word) free(pt->word);
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if (pt->description && !aliasm) free(pt->description);
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free(pt);
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pt = nt;
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}
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}
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free(tableptr);
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}
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tablesize = 0;
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if (aliasf) {
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for (int j = 0; j < (numaliasf); j++) free(aliasf[j]);
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free(aliasf);
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aliasf = NULL;
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if (aliasflen) {
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free(aliasflen);
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aliasflen = NULL;
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}
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}
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if (aliasm) {
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for (int j = 0; j < (numaliasm); j++) free(aliasm[j]);
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free(aliasm);
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aliasm = NULL;
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}
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}
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// lookup a root word in the hashtable
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struct hentry * HashMgr::lookup(const char *word) const
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{
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struct hentry * dp;
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if (tableptr) {
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dp = &tableptr[hash(word)];
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if (dp->word == NULL) return NULL;
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for ( ; dp != NULL; dp = dp->next) {
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if (strcmp(word,dp->word) == 0) return dp;
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}
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}
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return NULL;
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}
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// add a word to the hash table (private)
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int HashMgr::add_word(const char * word, int wl, unsigned short * aff, int al, const char * desc)
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{
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char * st = mystrdup(word);
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if (wl && !st) return 1;
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if (complexprefixes) {
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if (utf8) reverseword_utf(st); else reverseword(st);
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}
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int i = hash(st);
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struct hentry * dp = &tableptr[i];
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if (dp->word == NULL) {
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dp->wlen = wl;
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dp->alen = al;
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dp->word = st;
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dp->astr = aff;
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dp->next = NULL;
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dp->next_homonym = NULL;
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if (aliasm) {
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dp->description = (desc) ? get_aliasm(atoi(desc)) : mystrdup(desc);
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} else {
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dp->description = mystrdup(desc);
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if (desc && !dp->description) return 1;
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if (dp->description && complexprefixes) {
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if (utf8) reverseword_utf(dp->description); else reverseword(dp->description);
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}
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}
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} else {
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struct hentry* hp = (struct hentry *) malloc (sizeof(struct hentry));
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if (!hp) return 1;
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hp->wlen = wl;
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hp->alen = al;
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hp->word = st;
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hp->astr = aff;
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hp->next = NULL;
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hp->next_homonym = NULL;
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if (aliasm) {
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hp->description = (desc) ? get_aliasm(atoi(desc)) : mystrdup(desc);
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} else {
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hp->description = mystrdup(desc);
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if (desc && !hp->description) return 1;
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if (dp->description && complexprefixes) {
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if (utf8) reverseword_utf(hp->description); else reverseword(hp->description);
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}
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}
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while (dp->next != NULL) {
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if ((!dp->next_homonym) && (strcmp(hp->word, dp->word) == 0)) dp->next_homonym = hp;
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dp=dp->next;
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}
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if ((!dp->next_homonym) && (strcmp(hp->word, dp->word) == 0)) dp->next_homonym = hp;
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dp->next = hp;
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}
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return 0;
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}
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// add a custom dic. word to the hash table (public)
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int HashMgr::put_word(const char * word, int wl, char * aff)
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{
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unsigned short * flags;
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int al = 0;
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if (aff) {
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al = decode_flags(&flags, aff);
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flag_qsort(flags, 0, al);
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} else {
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flags = NULL;
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}
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add_word(word, wl, flags, al, NULL);
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return 0;
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}
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int HashMgr::put_word_pattern(const char * word, int wl, const char * pattern)
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{
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unsigned short * flags;
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struct hentry * dp = lookup(pattern);
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if (!dp || !dp->astr) return 1;
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flags = (unsigned short *) malloc (dp->alen * sizeof(short));
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memcpy((void *) flags, (void *) dp->astr, dp->alen * sizeof(short));
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add_word(word, wl, flags, dp->alen, NULL);
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return 0;
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}
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// walk the hash table entry by entry - null at end
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struct hentry * HashMgr::walk_hashtable(int &col, struct hentry * hp) const
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{
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//reset to start
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if ((col < 0) || (hp == NULL)) {
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col = -1;
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hp = NULL;
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}
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if (hp && hp->next != NULL) {
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hp = hp->next;
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} else {
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col++;
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hp = (col < tablesize) ? &tableptr[col] : NULL;
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// search for next non-blank column entry
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while (hp && (hp->word == NULL)) {
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col ++;
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hp = (col < tablesize) ? &tableptr[col] : NULL;
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}
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if (col < tablesize) return hp;
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hp = NULL;
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col = -1;
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}
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return hp;
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}
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// load a munched word list and build a hash table on the fly
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int HashMgr::load_tables(const char * tpath)
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{
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int wl, al;
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char * ap;
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char * dp;
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unsigned short * flags;
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// raw dictionary - munched file
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FILE * rawdict = fopen(tpath, "r");
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if (rawdict == NULL) return 1;
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// first read the first line of file to get hash table size */
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char ts[MAXDELEN];
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if (! fgets(ts, MAXDELEN-1,rawdict)) return 2;
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mychomp(ts);
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if ((*ts < '1') || (*ts > '9')) fprintf(stderr, "error - missing word count in dictionary file\n");
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tablesize = atoi(ts);
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if (!tablesize) return 4;
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tablesize = tablesize + 5 + USERWORD;
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if ((tablesize %2) == 0) tablesize++;
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// allocate the hash table
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tableptr = (struct hentry *) calloc(tablesize, sizeof(struct hentry));
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if (! tableptr) return 3;
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for (int i=0; i<tablesize; i++) tableptr[i].word = NULL;
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// loop through all words on much list and add to hash
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// table and create word and affix strings
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while (fgets(ts,MAXDELEN-1,rawdict)) {
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mychomp(ts);
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// split each line into word and morphological description
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dp = strchr(ts,'\t');
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if (dp) {
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*dp = '\0';
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dp++;
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} else {
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dp = NULL;
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}
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// split each line into word and affix char strings
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// "\/" signs slash in words (not affix separator)
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// "/" at beginning of the line is word character (not affix separator)
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ap = ts;
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while (ap = strchr(ap,'/')) {
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if (ap == ts) {
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ap++;
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continue;
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} else if (*(ap - 1) != '\\') break;
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// replace "\/" with "/"
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for (char * sp = ap - 1; *sp; *sp = *(sp + 1), sp++);
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}
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if (ap) {
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*ap = '\0';
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if (aliasf) {
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int index = atoi(ap + 1);
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al = get_aliasf(index, &flags);
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if (!al) {
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fprintf(stderr, "error - bad flag vector alias: %s\n", ts);
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*ap = '\0';
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}
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} else {
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al = decode_flags(&flags, ap + 1);
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flag_qsort(flags, 0, al);
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}
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} else {
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al = 0;
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ap = NULL;
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flags = NULL;
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}
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wl = strlen(ts);
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// add the word and its index
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if (add_word(ts,wl,flags,al,dp)) return 5;
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}
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fclose(rawdict);
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return 0;
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}
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// the hash function is a simple load and rotate
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// algorithm borrowed
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int HashMgr::hash(const char * word) const
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{
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long hv = 0;
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for (int i=0; i < 4 && *word != 0; i++)
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hv = (hv << 8) | (*word++);
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while (*word != 0) {
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ROTATE(hv,ROTATE_LEN);
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hv ^= (*word++);
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}
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return (unsigned long) hv % tablesize;
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}
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int HashMgr::decode_flags(unsigned short ** result, char * flags) {
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int len;
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switch (flag_mode) {
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case FLAG_LONG: { // two-character flags (1x2yZz -> 1x 2y Zz)
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len = strlen(flags);
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if (len%2 == 1) fprintf(stderr,"error: length of FLAG_LONG flagvector is odd: %s\n", flags);
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len = len/2;
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*result = (unsigned short *) malloc(len * sizeof(short));
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for (int i = 0; i < len; i++) {
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(*result)[i] = (((unsigned short) flags[i * 2]) << 8) + (unsigned short) flags[i * 2 + 1];
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}
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break;
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}
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case FLAG_NUM: { // decimal numbers separated by comma (4521,23,233 -> 4521 23 233)
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len = 1;
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char * src = flags;
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unsigned short * dest;
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char * p;
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for (p = flags; *p; p++) {
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if (*p == ',') len++;
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}
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*result = (unsigned short *) malloc(len * sizeof(short));
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dest = *result;
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for (p = flags; *p; p++) {
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if (*p == ',') {
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*dest = (unsigned short) atoi(src);
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if (*dest == 0) fprintf(stderr, "error: 0 is wrong flag id\n");
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src = p + 1;
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dest++;
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}
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}
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*dest = (unsigned short) atoi(src);
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if (*dest == 0) fprintf(stderr, "error: 0 is wrong flag id\n");
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break;
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}
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case FLAG_UNI: { // UTF-8 characters
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w_char w[MAXDELEN/2];
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len = u8_u16(w, MAXDELEN/2, flags);
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*result = (unsigned short *) malloc(len * sizeof(short));
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memcpy(*result, w, len * sizeof(short));
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break;
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}
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default: { // Ispell's one-character flags (erfg -> e r f g)
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unsigned short * dest;
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len = strlen(flags);
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*result = (unsigned short *) malloc(len * sizeof(short));
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dest = *result;
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for (unsigned char * p = (unsigned char *) flags; *p; p++) {
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*dest = (unsigned short) *p;
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dest++;
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}
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}
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}
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return len;
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}
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unsigned short HashMgr::decode_flag(const char * f) {
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unsigned short s = 0;
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switch (flag_mode) {
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case FLAG_LONG:
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s = ((unsigned short) f[0] << 8) + (unsigned short) f[1];
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break;
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case FLAG_NUM:
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s = (unsigned short) atoi(f);
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break;
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case FLAG_UNI:
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u8_u16((w_char *) &s, 1, f);
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break;
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default:
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s = (unsigned short) *((unsigned char *)f);
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}
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if (!s) fprintf(stderr, "error: 0 is wrong flag id\n");
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return s;
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}
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char * HashMgr::encode_flag(unsigned short f) {
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unsigned char ch[10];
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if (f==0) return mystrdup("(NULL)");
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if (flag_mode == FLAG_LONG) {
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ch[0] = (unsigned char) (f >> 8);
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ch[1] = (unsigned char) (f - ((f >> 8) << 8));
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ch[2] = '\0';
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} else if (flag_mode == FLAG_NUM) {
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sprintf((char *) ch, "%d", f);
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} else if (flag_mode == FLAG_UNI) {
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u16_u8((char *) &ch, 10, (w_char *) &f, 1);
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} else {
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ch[0] = (unsigned char) (f);
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ch[1] = '\0';
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}
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return mystrdup((char *) ch);
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}
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// read in aff file and set flag mode
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int HashMgr::load_config(const char * affpath)
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{
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// io buffers
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char line[MAXDELEN+1];
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// open the affix file
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FILE * afflst;
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afflst = fopen(affpath,"r");
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if (!afflst) {
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fprintf(stderr,"Error - could not open affix description file %s\n",affpath);
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return 1;
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}
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// read in each line ignoring any that do not
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// start with a known line type indicator
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while (fgets(line,MAXDELEN,afflst)) {
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mychomp(line);
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/* parse in the try string */
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if ((strncmp(line,"FLAG",4) == 0) && isspace(line[4])) {
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if (flag_mode != FLAG_CHAR) {
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fprintf(stderr,"error: duplicate FLAG parameter\n");
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}
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if (strstr(line, "long")) flag_mode = FLAG_LONG;
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if (strstr(line, "num")) flag_mode = FLAG_NUM;
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if (strstr(line, "UTF-8")) flag_mode = FLAG_UNI;
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if (flag_mode == FLAG_CHAR) {
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fprintf(stderr,"error: FLAG need `num', `long' or `UTF-8' parameter: %s\n", line);
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}
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}
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if ((strncmp(line,"SET",3) == 0) && isspace(line[3]) && strstr(line, "UTF-8")) utf8 = 1;
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if ((strncmp(line,"AF",2) == 0) && isspace(line[2])) {
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if (parse_aliasf(line, afflst)) {
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return 1;
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}
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}
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if ((strncmp(line,"AM",2) == 0) && isspace(line[2])) {
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if (parse_aliasm(line, afflst)) {
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return 1;
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}
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}
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if (strncmp(line,"COMPLEXPREFIXES",15) == 0) complexprefixes = 1;
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if (((strncmp(line,"SFX",3) == 0) || (strncmp(line,"PFX",3) == 0)) && isspace(line[3])) break;
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}
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fclose(afflst);
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return 0;
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}
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/* parse in the ALIAS table */
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int HashMgr::parse_aliasf(char * line, FILE * af)
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{
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if (numaliasf != 0) {
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fprintf(stderr,"error: duplicate AF (alias for flag vector) tables used\n");
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return 1;
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}
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char * tp = line;
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char * piece;
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int i = 0;
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int np = 0;
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while ((piece=mystrsep(&tp, 0))) {
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if (*piece != '\0') {
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switch(i) {
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case 0: { np++; break; }
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case 1: {
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numaliasf = atoi(piece);
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if (numaliasf < 1) {
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numaliasf = 0;
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aliasf = NULL;
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aliasflen = NULL;
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fprintf(stderr,"incorrect number of entries in AF table\n");
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free(piece);
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return 1;
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}
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aliasf = (unsigned short **) malloc(numaliasf * sizeof(unsigned short *));
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aliasflen = (unsigned short *) malloc(numaliasf * sizeof(short));
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if (!aliasf || !aliasflen) {
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numaliasf = 0;
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if (aliasf) free(aliasf);
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if (aliasflen) free(aliasflen);
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aliasf = NULL;
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aliasflen = NULL;
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return 1;
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}
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np++;
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break;
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}
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default: break;
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}
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i++;
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}
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free(piece);
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}
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if (np != 2) {
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numaliasf = 0;
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free(aliasf);
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free(aliasflen);
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aliasf = NULL;
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aliasflen = NULL;
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fprintf(stderr,"error: missing AF table information\n");
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return 1;
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}
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/* now parse the numaliasf lines to read in the remainder of the table */
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char * nl = line;
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for (int j=0; j < numaliasf; j++) {
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if (!fgets(nl,MAXDELEN,af)) return 1;
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mychomp(nl);
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tp = nl;
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i = 0;
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aliasf[j] = NULL;
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aliasflen[j] = 0;
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while ((piece=mystrsep(&tp, 0))) {
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|
if (*piece != '\0') {
|
|
switch(i) {
|
|
case 0: {
|
|
if (strncmp(piece,"AF",2) != 0) {
|
|
numaliasf = 0;
|
|
free(aliasf);
|
|
free(aliasflen);
|
|
aliasf = NULL;
|
|
aliasflen = NULL;
|
|
fprintf(stderr,"error: AF table is corrupt\n");
|
|
free(piece);
|
|
return 1;
|
|
}
|
|
break;
|
|
}
|
|
case 1: {
|
|
aliasflen[j] = decode_flags(&(aliasf[j]), piece);
|
|
flag_qsort(aliasf[j], 0, aliasflen[j]);
|
|
break;
|
|
}
|
|
default: break;
|
|
}
|
|
i++;
|
|
}
|
|
free(piece);
|
|
}
|
|
if (!aliasf[j]) {
|
|
free(aliasf);
|
|
free(aliasflen);
|
|
aliasf = NULL;
|
|
aliasflen = NULL;
|
|
numaliasf = 0;
|
|
fprintf(stderr,"error: AF table is corrupt\n");
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* parse morph alias definitions */
|
|
int HashMgr::parse_aliasm(char * line, FILE * af)
|
|
{
|
|
if (numaliasm != 0) {
|
|
fprintf(stderr,"error: duplicate AM (aliases for morphological descriptions) tables used\n");
|
|
return 1;
|
|
}
|
|
char * tp = line;
|
|
char * piece;
|
|
int i = 0;
|
|
int np = 0;
|
|
while ((piece=mystrsep(&tp, 0))) {
|
|
if (*piece != '\0') {
|
|
switch(i) {
|
|
case 0: { np++; break; }
|
|
case 1: {
|
|
numaliasm = atoi(piece);
|
|
if (numaliasm < 1) {
|
|
fprintf(stderr,"incorrect number of entries in AM table\n");
|
|
free(piece);
|
|
return 1;
|
|
}
|
|
aliasm = (char **) malloc(numaliasm * sizeof(char *));
|
|
if (!aliasm) {
|
|
numaliasm = 0;
|
|
return 1;
|
|
}
|
|
np++;
|
|
break;
|
|
}
|
|
default: break;
|
|
}
|
|
i++;
|
|
}
|
|
free(piece);
|
|
}
|
|
if (np != 2) {
|
|
numaliasm = 0;
|
|
free(aliasm);
|
|
aliasm = NULL;
|
|
fprintf(stderr,"error: missing AM alias information\n");
|
|
return 1;
|
|
}
|
|
|
|
/* now parse the numaliasm lines to read in the remainder of the table */
|
|
char * nl = line;
|
|
for (int j=0; j < numaliasm; j++) {
|
|
if (!fgets(nl,MAXDELEN,af)) return 1;
|
|
mychomp(nl);
|
|
tp = nl;
|
|
i = 0;
|
|
aliasm[j] = NULL;
|
|
while ((piece=mystrsep(&tp, 0))) {
|
|
if (*piece != '\0') {
|
|
switch(i) {
|
|
case 0: {
|
|
if (strncmp(piece,"AM",2) != 0) {
|
|
fprintf(stderr,"error: AM table is corrupt\n");
|
|
free(piece);
|
|
numaliasm = 0;
|
|
free(aliasm);
|
|
aliasm = NULL;
|
|
return 1;
|
|
}
|
|
break;
|
|
}
|
|
case 1: {
|
|
if (complexprefixes) {
|
|
if (utf8) reverseword_utf(piece);
|
|
else reverseword(piece);
|
|
}
|
|
aliasm[j] = mystrdup(piece);
|
|
break; }
|
|
default: break;
|
|
}
|
|
i++;
|
|
}
|
|
free(piece);
|
|
}
|
|
if (!aliasm[j]) {
|
|
numaliasm = 0;
|
|
free(aliasm);
|
|
aliasm = NULL;
|
|
fprintf(stderr,"error: map table is corrupt\n");
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int HashMgr::is_aliasf() {
|
|
return (aliasf != NULL);
|
|
}
|
|
|
|
int HashMgr::is_aliasm() {
|
|
return (aliasm != NULL);
|
|
}
|
|
|
|
int HashMgr::get_aliasf(int index, unsigned short ** fvec) {
|
|
if ((index > 0) && (index <= numaliasf)) {
|
|
*fvec = aliasf[index - 1];
|
|
return aliasflen[index - 1];
|
|
}
|
|
fprintf(stderr,"error: bad flag alias index: %d\n", index);
|
|
fprintf(stderr,"hiba: %d\n", index);
|
|
*fvec = NULL;
|
|
return 0;
|
|
}
|
|
|
|
char * HashMgr::get_aliasm(int index) {
|
|
if ((index > 0) && (index <= numaliasm)) return aliasm[index - 1];
|
|
fprintf(stderr,"error: bad morph. alias index: %d\n", index);
|
|
return NULL;
|
|
}
|