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gecko-dev/intl/hyphenation/hyphen/hyphen.c

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34 KiB
C
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/* Libhnj is dual licensed under LGPL and MPL. Boilerplate for both
* licenses follows.
*/
/* LibHnj - a library for high quality hyphenation and justification
* Copyright (C) 1998 Raph Levien,
* (C) 2001 ALTLinux, Moscow (http://www.alt-linux.org),
* (C) 2001 Peter Novodvorsky (nidd@cs.msu.su)
* (C) 2006, 2007, 2008, 2010 László Németh (nemeth at OOo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307 USA.
*/
/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "MPL"); you may not use this file except in
* compliance with the MPL. You may obtain a copy of the MPL at
* http://www.mozilla.org/MPL/
*
* Software distributed under the MPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the MPL
* for the specific language governing rights and limitations under the
* MPL.
*
*/
#include <stdlib.h> /* for NULL, malloc */
#include <stdio.h> /* for fprintf */
#include <string.h> /* for strdup */
#include <limits.h> /* for INT_MAX */
#ifdef UNX
#include <unistd.h> /* for exit */
#endif
#define noVERBOSE
/* calculate hyphenmin values with long ligature length (2 or 3 characters
* instead of 1 or 2) for comparison with hyphenation without ligatures */
#define noLONG_LIGATURE
#ifdef LONG_LIGATURE
#define LIG_xx 1
#define LIG_xxx 2
#else
#define LIG_xx 0
#define LIG_xxx 1
#endif
#include "hnjalloc.h"
#include "hyphen.h"
static char *
hnj_strdup (const char *s)
{
char *newstr;
int l;
l = strlen (s);
newstr = (char *) hnj_malloc (l + 1);
memcpy (newstr, s, l);
newstr[l] = 0;
return newstr;
}
/* remove cross-platform text line end characters */
void hnj_strchomp(char * s)
{
int k = strlen(s);
if ((k > 0) && ((*(s+k-1)=='\r') || (*(s+k-1)=='\n'))) *(s+k-1) = '\0';
if ((k > 1) && (*(s+k-2) == '\r')) *(s+k-2) = '\0';
}
/* a little bit of a hash table implementation. This simply maps strings
to state numbers */
typedef struct _HashTab HashTab;
typedef struct _HashEntry HashEntry;
/* A cheap, but effective, hack. */
#define HASH_SIZE 31627
struct _HashTab {
HashEntry *entries[HASH_SIZE];
};
struct _HashEntry {
HashEntry *next;
char *key;
int val;
};
/* a char* hash function from ASU - adapted from Gtk+ */
static unsigned int
hnj_string_hash (const char *s)
{
const char *p;
unsigned int h=0, g;
for(p = s; *p != '\0'; p += 1) {
h = ( h << 4 ) + *p;
if ( ( g = h & 0xf0000000 ) ) {
h = h ^ (g >> 24);
h = h ^ g;
}
}
return h /* % M */;
}
static HashTab *
hnj_hash_new (void)
{
HashTab *hashtab;
int i;
hashtab = (HashTab *) hnj_malloc (sizeof(HashTab));
for (i = 0; i < HASH_SIZE; i++)
hashtab->entries[i] = NULL;
return hashtab;
}
static void
hnj_hash_free (HashTab *hashtab)
{
int i;
HashEntry *e, *next;
for (i = 0; i < HASH_SIZE; i++)
for (e = hashtab->entries[i]; e; e = next)
{
next = e->next;
hnj_free (e->key);
hnj_free (e);
}
hnj_free (hashtab);
}
/* assumes that key is not already present! */
static void
hnj_hash_insert (HashTab *hashtab, const char *key, int val)
{
int i;
HashEntry *e;
i = hnj_string_hash (key) % HASH_SIZE;
e = (HashEntry *) hnj_malloc (sizeof(HashEntry));
e->next = hashtab->entries[i];
e->key = hnj_strdup (key);
e->val = val;
hashtab->entries[i] = e;
}
/* return val if found, otherwise -1 */
static int
hnj_hash_lookup (HashTab *hashtab, const char *key)
{
int i;
HashEntry *e;
i = hnj_string_hash (key) % HASH_SIZE;
for (e = hashtab->entries[i]; e; e = e->next)
if (!strcmp (key, e->key))
return e->val;
return -1;
}
/* Get the state number, allocating a new state if necessary. */
static int
hnj_get_state (HyphenDict *dict, HashTab *hashtab, const char *string)
{
int state_num;
state_num = hnj_hash_lookup (hashtab, string);
if (state_num >= 0)
return state_num;
hnj_hash_insert (hashtab, string, dict->num_states);
/* predicate is true if dict->num_states is a power of two */
if (!(dict->num_states & (dict->num_states - 1)))
{
dict->states = (HyphenState *) hnj_realloc (dict->states,
(dict->num_states << 1) *
sizeof(HyphenState));
}
dict->states[dict->num_states].match = NULL;
dict->states[dict->num_states].repl = NULL;
dict->states[dict->num_states].fallback_state = -1;
dict->states[dict->num_states].num_trans = 0;
dict->states[dict->num_states].trans = NULL;
return dict->num_states++;
}
/* add a transition from state1 to state2 through ch - assumes that the
transition does not already exist */
static void
hnj_add_trans (HyphenDict *dict, int state1, int state2, char ch)
{
int num_trans;
num_trans = dict->states[state1].num_trans;
if (num_trans == 0)
{
dict->states[state1].trans = (HyphenTrans *) hnj_malloc (sizeof(HyphenTrans));
}
else if (!(num_trans & (num_trans - 1)))
{
dict->states[state1].trans = (HyphenTrans *) hnj_realloc (dict->states[state1].trans,
(num_trans << 1) *
sizeof(HyphenTrans));
}
dict->states[state1].trans[num_trans].ch = ch;
dict->states[state1].trans[num_trans].new_state = state2;
dict->states[state1].num_trans++;
}
#ifdef VERBOSE
HashTab *global[1];
static char *
get_state_str (int state, int level)
{
int i;
HashEntry *e;
for (i = 0; i < HASH_SIZE; i++)
for (e = global[level]->entries[i]; e; e = e->next)
if (e->val == state)
return e->key;
return NULL;
}
#endif
void hnj_hyphen_load_line(char * buf, HyphenDict * dict, HashTab * hashtab) {
int i, j;
char word[MAX_CHARS];
char pattern[MAX_CHARS];
char * repl;
signed char replindex;
signed char replcut;
int state_num = 0;
int last_state;
char ch;
int found;
if (strncmp(buf, "LEFTHYPHENMIN", 13) == 0) {
dict->lhmin = atoi(buf + 13);
return;
} else if (strncmp(buf, "RIGHTHYPHENMIN", 14) == 0) {
dict->rhmin = atoi(buf + 14);
return;
} else if (strncmp(buf, "COMPOUNDLEFTHYPHENMIN", 21) == 0) {
dict->clhmin = atoi(buf + 21);
return;
} else if (strncmp(buf, "COMPOUNDRIGHTHYPHENMIN", 22) == 0) {
dict->crhmin = atoi(buf + 22);
return;
} else if (strncmp(buf, "NOHYPHEN", 8) == 0) {
char * space = buf + 8;
while (*space != '\0' && (*space == ' ' || *space == '\t')) space++;
if (*buf != '\0') dict->nohyphen = hnj_strdup(space);
if (dict->nohyphen) {
char * nhe = dict->nohyphen + strlen(dict->nohyphen) - 1;
*nhe = 0;
for (nhe = nhe - 1; nhe > dict->nohyphen; nhe--) {
if (*nhe == ',') {
dict->nohyphenl++;
*nhe = 0;
}
}
}
return;
}
j = 0;
pattern[j] = '0';
repl = strchr(buf, '/');
replindex = 0;
replcut = 0;
if (repl) {
char * index = strchr(repl + 1, ',');
*repl = '\0';
if (index) {
char * index2 = strchr(index + 1, ',');
*index = '\0';
if (index2) {
*index2 = '\0';
replindex = (signed char) atoi(index + 1) - 1;
replcut = (signed char) atoi(index2 + 1);
}
} else {
hnj_strchomp(repl + 1);
replindex = 0;
replcut = (signed char) strlen(buf);
}
repl = hnj_strdup(repl + 1);
}
for (i = 0; (unsigned char)buf[i] > (unsigned char)' '; i++)
{
if (buf[i] >= '0' && buf[i] <= '9')
pattern[j] = buf[i];
else
{
word[j] = buf[i];
pattern[++j] = '0';
}
}
word[j] = '\0';
pattern[j + 1] = '\0';
i = 0;
if (!repl) {
/* Optimize away leading zeroes */
for (; pattern[i] == '0'; i++);
} else {
if (*word == '.') i++;
/* convert UTF-8 char. positions of discretionary hyph. replacements to 8-bit */
if (dict->utf8) {
int pu = -1; /* unicode character position */
int ps = -1; /* unicode start position (original replindex) */
size_t pc = (*word == '.') ? 1: 0; /* 8-bit character position */
for (; pc < (strlen(word) + 1); pc++) {
/* beginning of an UTF-8 character (not '10' start bits) */
if ((((unsigned char) word[pc]) >> 6) != 2) pu++;
if ((ps < 0) && (replindex == pu)) {
ps = replindex;
replindex = (signed char) pc;
}
if ((ps >= 0) && ((pu - ps) == replcut)) {
replcut = (signed char) (pc - replindex);
break;
}
}
if (*word == '.') replindex--;
}
}
#ifdef VERBOSE
printf ("word %s pattern %s, j = %d repl: %s\n", word, pattern + i, j, repl);
#endif
found = hnj_hash_lookup (hashtab, word);
state_num = hnj_get_state (dict, hashtab, word);
dict->states[state_num].match = hnj_strdup (pattern + i);
dict->states[state_num].repl = repl;
dict->states[state_num].replindex = replindex;
if (!replcut) {
dict->states[state_num].replcut = (signed char) strlen(word);
} else {
dict->states[state_num].replcut = replcut;
}
/* now, put in the prefix transitions */
for (; found < 0 && j > 0; --j)
{
last_state = state_num;
ch = word[j - 1];
word[j - 1] = '\0';
found = hnj_hash_lookup (hashtab, word);
state_num = hnj_get_state (dict, hashtab, word);
hnj_add_trans (dict, state_num, last_state, ch);
}
}
HyphenDict *
hnj_hyphen_load (const char *fn)
{
HyphenDict *result;
FILE *f;
f = fopen (fn, "r");
if (f == NULL)
return NULL;
result = hnj_hyphen_load_file(f);
fclose(f);
return result;
}
HyphenDict *
hnj_hyphen_load_file (FILE *f)
{
HyphenDict *dict[2];
HashTab *hashtab;
char buf[MAX_CHARS];
int nextlevel = 0;
int i, j, k;
HashEntry *e;
int state_num = 0;
/* loading one or two dictionaries (separated by NEXTLEVEL keyword) */
for (k = 0; k < 2; k++) {
hashtab = hnj_hash_new ();
#ifdef VERBOSE
global[k] = hashtab;
#endif
hnj_hash_insert (hashtab, "", 0);
dict[k] = (HyphenDict *) hnj_malloc (sizeof(HyphenDict));
dict[k]->num_states = 1;
dict[k]->states = (HyphenState *) hnj_malloc (sizeof(HyphenState));
dict[k]->states[0].match = NULL;
dict[k]->states[0].repl = NULL;
dict[k]->states[0].fallback_state = -1;
dict[k]->states[0].num_trans = 0;
dict[k]->states[0].trans = NULL;
dict[k]->nextlevel = NULL;
dict[k]->lhmin = 0;
dict[k]->rhmin = 0;
dict[k]->clhmin = 0;
dict[k]->crhmin = 0;
dict[k]->nohyphen = NULL;
dict[k]->nohyphenl = 0;
/* read in character set info */
if (k == 0) {
for (i=0;i<MAX_NAME;i++) dict[k]->cset[i]= 0;
if (fgets(dict[k]->cset, sizeof(dict[k]->cset),f) != NULL) {
for (i=0;i<MAX_NAME;i++)
if ((dict[k]->cset[i] == '\r') || (dict[k]->cset[i] == '\n'))
dict[k]->cset[i] = 0;
} else {
dict[k]->cset[0] = 0;
}
dict[k]->utf8 = (strcmp(dict[k]->cset, "UTF-8") == 0);
} else {
strncpy(dict[k]->cset, dict[0]->cset, sizeof(dict[k]->cset)-1);
dict[k]->cset[sizeof(dict[k]->cset)-1] = '\0';
dict[k]->utf8 = dict[0]->utf8;
}
if (k == 0 || nextlevel) {
while (fgets (buf, sizeof(buf), f) != NULL) {
if (strncmp(buf, "NEXTLEVEL", 9) == 0) {
nextlevel = 1;
break;
} else if (buf[0] != '%') hnj_hyphen_load_line(buf, dict[k], hashtab);
}
} else if (k == 1) {
/* default first level: hyphen and ASCII apostrophe */
if (!dict[0]->utf8) hnj_hyphen_load_line("NOHYPHEN ',-\n", dict[k], hashtab);
else hnj_hyphen_load_line("NOHYPHEN ',\xe2\x80\x93,\xe2\x80\x99,-\n", dict[k], hashtab);
strncpy(buf, "1-1\n", MAX_CHARS-1); /* buf rewritten by hnj_hyphen_load here */
buf[MAX_CHARS-1] = '\0';
hnj_hyphen_load_line(buf, dict[k], hashtab); /* remove hyphen */
hnj_hyphen_load_line("1'1\n", dict[k], hashtab); /* ASCII apostrophe */
if (dict[0]->utf8) {
hnj_hyphen_load_line("1\xe2\x80\x93" "1\n", dict[k], hashtab); /* endash */
hnj_hyphen_load_line("1\xe2\x80\x99" "1\n", dict[k], hashtab); /* apostrophe */
}
}
/* Could do unioning of matches here (instead of the preprocessor script).
If we did, the pseudocode would look something like this:
foreach state in the hash table
foreach i = [1..length(state) - 1]
state to check is substr (state, i)
look it up
if found, and if there is a match, union the match in.
It's also possible to avoid the quadratic blowup by doing the
search in order of increasing state string sizes - then you
can break the loop after finding the first match.
This step should be optional in any case - if there is a
preprocessed rule table, it's always faster to use that.
*/
/* put in the fallback states */
for (i = 0; i < HASH_SIZE; i++)
for (e = hashtab->entries[i]; e; e = e->next)
{
if (*(e->key)) for (j = 1; 1; j++)
{
state_num = hnj_hash_lookup (hashtab, e->key + j);
if (state_num >= 0)
break;
}
/* KBH: FIXME state 0 fallback_state should always be -1? */
if (e->val)
dict[k]->states[e->val].fallback_state = state_num;
}
#ifdef VERBOSE
for (i = 0; i < HASH_SIZE; i++)
for (e = hashtab->entries[i]; e; e = e->next)
{
printf ("%d string %s state %d, fallback=%d\n", i, e->key, e->val,
dict[k]->states[e->val].fallback_state);
for (j = 0; j < dict[k]->states[e->val].num_trans; j++)
printf (" %c->%d\n", dict[k]->states[e->val].trans[j].ch,
dict[k]->states[e->val].trans[j].new_state);
}
#endif
#ifndef VERBOSE
hnj_hash_free (hashtab);
#endif
state_num = 0;
}
if (nextlevel) dict[0]->nextlevel = dict[1];
else {
dict[1] -> nextlevel = dict[0];
dict[1]->lhmin = dict[0]->lhmin;
dict[1]->rhmin = dict[0]->rhmin;
dict[1]->clhmin = (dict[0]->clhmin) ? dict[0]->clhmin : ((dict[0]->lhmin) ? dict[0]->lhmin : 3);
dict[1]->crhmin = (dict[0]->crhmin) ? dict[0]->crhmin : ((dict[0]->rhmin) ? dict[0]->rhmin : 3);
#ifdef VERBOSE
HashTab *r = global[0];
global[0] = global[1];
global[1] = r;
#endif
return dict[1];
}
return dict[0];
}
void hnj_hyphen_free (HyphenDict *dict)
{
int state_num;
HyphenState *hstate;
for (state_num = 0; state_num < dict->num_states; state_num++)
{
hstate = &dict->states[state_num];
if (hstate->match)
hnj_free (hstate->match);
if (hstate->repl)
hnj_free (hstate->repl);
if (hstate->trans)
hnj_free (hstate->trans);
}
if (dict->nextlevel) hnj_hyphen_free(dict->nextlevel);
if (dict->nohyphen) hnj_free(dict->nohyphen);
hnj_free (dict->states);
hnj_free (dict);
}
#define MAX_WORD 256
int hnj_hyphen_hyphenate (HyphenDict *dict,
const char *word, int word_size,
char *hyphens)
{
char *prep_word;
int i, j, k;
int state;
char ch;
HyphenState *hstate;
char *match;
int offset;
prep_word = (char*) hnj_malloc (word_size + 3);
j = 0;
prep_word[j++] = '.';
for (i = 0; i < word_size; i++) {
if (word[i] <= '9' && word[i] >= '0') {
prep_word[j++] = '.';
} else {
prep_word[j++] = word[i];
}
}
prep_word[j++] = '.';
prep_word[j] = '\0';
for (i = 0; i < word_size + 5; i++)
hyphens[i] = '0';
#ifdef VERBOSE
printf ("prep_word = %s\n", prep_word);
#endif
/* now, run the finite state machine */
state = 0;
for (i = 0; i < j; i++)
{
ch = prep_word[i];
for (;;)
{
if (state == -1) {
/* return 1; */
/* KBH: FIXME shouldn't this be as follows? */
state = 0;
goto try_next_letter;
}
#ifdef VERBOSE
char *state_str;
state_str = get_state_str (state, 0);
for (k = 0; k < i - strlen (state_str); k++)
putchar (' ');
printf ("%s", state_str);
#endif
hstate = &dict->states[state];
for (k = 0; k < hstate->num_trans; k++)
if (hstate->trans[k].ch == ch)
{
state = hstate->trans[k].new_state;
goto found_state;
}
state = hstate->fallback_state;
#ifdef VERBOSE
printf (" falling back, fallback_state %d\n", state);
#endif
}
found_state:
#ifdef VERBOSE
printf ("found state %d\n",state);
#endif
/* Additional optimization is possible here - especially,
elimination of trailing zeroes from the match. Leading zeroes
have already been optimized. */
match = dict->states[state].match;
/* replacing rules not handled by hyphen_hyphenate() */
if (match && !dict->states[state].repl)
{
offset = i + 1 - strlen (match);
#ifdef VERBOSE
for (k = 0; k < offset; k++)
putchar (' ');
printf ("%s\n", match);
#endif
/* This is a linear search because I tried a binary search and
found it to be just a teeny bit slower. */
for (k = 0; match[k]; k++)
if (hyphens[offset + k] < match[k])
hyphens[offset + k] = match[k];
}
/* KBH: we need this to make sure we keep looking in a word */
/* for patterns even if the current character is not known in state 0 */
/* since patterns for hyphenation may occur anywhere in the word */
try_next_letter: ;
}
#ifdef VERBOSE
for (i = 0; i < j; i++)
putchar (hyphens[i]);
putchar ('\n');
#endif
for (i = 0; i < j - 4; i++)
#if 0
if (hyphens[i + 1] & 1)
hyphens[i] = '-';
#else
hyphens[i] = hyphens[i + 1];
#endif
hyphens[0] = '0';
for (; i < word_size; i++)
hyphens[i] = '0';
hyphens[word_size] = '\0';
hnj_free (prep_word);
return 0;
}
/* Unicode ligature length */
int hnj_ligature(unsigned char c) {
switch (c) {
case 0x80: /* ff */
case 0x81: /* fi */
case 0x82: return LIG_xx; /* fl */
case 0x83: /* ffi */
case 0x84: return LIG_xxx; /* ffl */
case 0x85: /* long st */
case 0x86: return LIG_xx; /* st */
}
return 0;
}
/* character length of the first n byte of the input word */
int hnj_hyphen_strnlen(const char * word, int n, int utf8)
{
int i = 0;
int j = 0;
while (j < n && word[j] != '\0') {
i++;
/* Unicode ligature support */
if (utf8 && ((unsigned char) word[j] == 0xEF) && ((unsigned char) word[j + 1] == 0xAC)) {
i += hnj_ligature(word[j + 2]);
}
for (j++; utf8 && (word[j] & 0xc0) == 0x80; j++);
}
return i;
}
int hnj_hyphen_lhmin(int utf8, const char *word, int word_size, char * hyphens,
char *** rep, int ** pos, int ** cut, int lhmin)
{
int i = 1, j;
/* Unicode ligature support */
if (utf8 && ((unsigned char) word[0] == 0xEF) && ((unsigned char) word[1] == 0xAC)) {
i += hnj_ligature(word[2]);
}
/* ignore numbers */
for (j = 0; word[j] <= '9' && word[j] >= '0'; j++) i--;
for (j = 0; i < lhmin && word[j] != '\0'; i++) do {
/* check length of the non-standard part */
if (*rep && *pos && *cut && (*rep)[j]) {
char * rh = strchr((*rep)[j], '=');
if (rh && (hnj_hyphen_strnlen(word, j - (*pos)[j] + 1, utf8) +
hnj_hyphen_strnlen((*rep)[j], rh - (*rep)[j], utf8)) < lhmin) {
free((*rep)[j]);
(*rep)[j] = NULL;
hyphens[j] = '0';
}
} else {
hyphens[j] = '0';
}
j++;
/* Unicode ligature support */
if (utf8 && ((unsigned char) word[j] == 0xEF) && ((unsigned char) word[j + 1] == 0xAC)) {
i += hnj_ligature(word[j + 2]);
}
} while (utf8 && (word[j] & 0xc0) == 0x80);
return 0;
}
int hnj_hyphen_rhmin(int utf8, const char *word, int word_size, char * hyphens,
char *** rep, int ** pos, int ** cut, int rhmin)
{
int i = 0;
int j;
/* ignore numbers */
for (j = word_size - 1; j > 0 && word[j] <= '9' && word[j] >= '0'; j--) i--;
for (j = word_size - 1; i < rhmin && j > 0; j--) {
/* check length of the non-standard part */
if (*rep && *pos && *cut && (*rep)[j]) {
char * rh = strchr((*rep)[j], '=');
if (rh && (hnj_hyphen_strnlen(word + j - (*pos)[j] + (*cut)[j] + 1, 100, utf8) +
hnj_hyphen_strnlen(rh + 1, strlen(rh + 1), utf8)) < rhmin) {
free((*rep)[j]);
(*rep)[j] = NULL;
hyphens[j] = '0';
}
} else {
hyphens[j] = '0';
}
if (!utf8 || (word[j] & 0xc0) == 0xc0 || (word[j] & 0x80) != 0x80) i++;
}
return 0;
}
/* recursive function for compound level hyphenation */
int hnj_hyphen_hyph_(HyphenDict *dict, const char *word, int word_size,
char * hyphens, char *** rep, int ** pos, int ** cut,
int clhmin, int crhmin, int lend, int rend)
{
char *prep_word;
int i, j, k;
int state;
char ch;
HyphenState *hstate;
char *match;
char *repl;
signed char replindex;
signed char replcut;
int offset;
int * matchlen;
int * matchindex;
char ** matchrepl;
int isrepl = 0;
int nHyphCount;
size_t prep_word_size = word_size + 3;
prep_word = (char*) hnj_malloc (prep_word_size);
matchlen = (int*) hnj_malloc ((word_size + 3) * sizeof(int));
matchindex = (int*) hnj_malloc ((word_size + 3) * sizeof(int));
matchrepl = (char**) hnj_malloc ((word_size + 3) * sizeof(char *));
j = 0;
prep_word[j++] = '.';
for (i = 0; i < word_size; i++) {
if (word[i] <= '9' && word[i] >= '0') {
prep_word[j++] = '.';
} else {
prep_word[j++] = word[i];
}
}
prep_word[j++] = '.';
prep_word[j] = '\0';
for (i = 0; i < j; i++)
hyphens[i] = '0';
#ifdef VERBOSE
printf ("prep_word = %s\n", prep_word);
#endif
/* now, run the finite state machine */
state = 0;
for (i = 0; i < j; i++)
{
ch = prep_word[i];
for (;;)
{
if (state == -1) {
/* return 1; */
/* KBH: FIXME shouldn't this be as follows? */
state = 0;
goto try_next_letter;
}
#ifdef VERBOSE
char *state_str;
state_str = get_state_str (state, 1);
for (k = 0; k < i - strlen (state_str); k++)
putchar (' ');
printf ("%s", state_str);
#endif
hstate = &dict->states[state];
for (k = 0; k < hstate->num_trans; k++)
if (hstate->trans[k].ch == ch)
{
state = hstate->trans[k].new_state;
goto found_state;
}
state = hstate->fallback_state;
#ifdef VERBOSE
printf (" falling back, fallback_state %d\n", state);
#endif
}
found_state:
#ifdef VERBOSE
printf ("found state %d\n",state);
#endif
/* Additional optimization is possible here - especially,
elimination of trailing zeroes from the match. Leading zeroes
have already been optimized. */
match = dict->states[state].match;
repl = dict->states[state].repl;
replindex = dict->states[state].replindex;
replcut = dict->states[state].replcut;
/* replacing rules not handled by hyphen_hyphenate() */
if (match)
{
offset = i + 1 - strlen (match);
#ifdef VERBOSE
for (k = 0; k < offset; k++)
putchar (' ');
printf ("%s (%s)\n", match, repl);
#endif
if (repl) {
if (!isrepl) for(; isrepl < word_size; isrepl++) {
matchrepl[isrepl] = NULL;
matchindex[isrepl] = -1;
}
matchlen[offset + replindex] = replcut;
}
/* This is a linear search because I tried a binary search and
found it to be just a teeny bit slower. */
for (k = 0; match[k]; k++) {
if ((hyphens[offset + k] < match[k])) {
hyphens[offset + k] = match[k];
if (match[k]&1) {
matchrepl[offset + k] = repl;
if (repl && (k >= replindex) && (k <= replindex + replcut)) {
matchindex[offset + replindex] = offset + k;
}
}
}
}
}
/* KBH: we need this to make sure we keep looking in a word */
/* for patterns even if the current character is not known in state 0 */
/* since patterns for hyphenation may occur anywhere in the word */
try_next_letter: ;
}
#ifdef VERBOSE
for (i = 0; i < j; i++)
putchar (hyphens[i]);
putchar ('\n');
#endif
for (i = 0; i < j - 3; i++)
#if 0
if (hyphens[i + 1] & 1)
hyphens[i] = '-';
#else
hyphens[i] = hyphens[i + 1];
#endif
for (; i < word_size; i++)
hyphens[i] = '0';
hyphens[word_size] = '\0';
/* now create a new char string showing hyphenation positions */
/* count the hyphens and allocate space for the new hyphenated string */
nHyphCount = 0;
for (i = 0; i < word_size; i++)
if (hyphens[i]&1)
nHyphCount++;
j = 0;
for (i = 0; i < word_size; i++) {
if (isrepl && (matchindex[i] >= 0) && matchrepl[matchindex[i]]) {
if (rep && pos && cut) {
if (!*rep)
*rep = (char **) calloc(word_size, sizeof(char *));
if (!*pos)
*pos = (int *) calloc(word_size, sizeof(int));
if (!*cut) {
*cut = (int *) calloc(word_size, sizeof(int));
}
(*rep)[matchindex[i] - 1] = hnj_strdup(matchrepl[matchindex[i]]);
(*pos)[matchindex[i] - 1] = matchindex[i] - i;
(*cut)[matchindex[i] - 1] = matchlen[i];
}
j += strlen(matchrepl[matchindex[i]]);
i += matchlen[i] - 1;
}
}
hnj_free (matchrepl);
hnj_free (matchlen);
hnj_free (matchindex);
/* recursive hyphenation of the first (compound) level segments */
if (dict->nextlevel) {
char ** rep2;
int * pos2;
int * cut2;
char * hyphens2;
int begin = 0;
rep2 = (char**) hnj_malloc (word_size * sizeof(char *));
pos2 = (int*) hnj_malloc (word_size * sizeof(int));
cut2 = (int*) hnj_malloc (word_size * sizeof(int));
hyphens2 = (char*) hnj_malloc (word_size + 3);
for (i = 0; i < word_size; i++) rep2[i] = NULL;
for (i = 0; i < word_size; i++) if
(hyphens[i]&1 || (begin > 0 && i + 1 == word_size)) {
if (i - begin > 0) {
int hyph = 0;
prep_word[i + 2] = '\0';
/* non-standard hyphenation at compound boundary (Schiffahrt) */
if (rep && *rep && *pos && *cut && (*rep)[i]) {
char * l = strchr((*rep)[i], '=');
size_t offset = 2 + i - (*pos)[i];
strncpy(prep_word + offset, (*rep)[i], prep_word_size - offset - 1);
prep_word[prep_word_size - 1] = '\0';
if (l) {
hyph = (l - (*rep)[i]) - (*pos)[i];
prep_word[2 + i + hyph] = '\0';
}
}
hnj_hyphen_hyph_(dict, prep_word + begin + 1, i - begin + 1 + hyph,
hyphens2, &rep2, &pos2, &cut2, clhmin,
crhmin, (begin > 0 ? 0 : lend), (hyphens[i]&1 ? 0 : rend));
for (j = 0; j < i - begin; j++) {
hyphens[begin + j] = hyphens2[j];
if (rep2[j] && rep && pos && cut) {
if (!*rep && !*pos && !*cut) {
int k;
*rep = (char **) malloc(sizeof(char *) * word_size);
*pos = (int *) malloc(sizeof(int) * word_size);
*cut = (int *) malloc(sizeof(int) * word_size);
for (k = 0; k < word_size; k++) {
(*rep)[k] = NULL;
(*pos)[k] = 0;
(*cut)[k] = 0;
}
}
(*rep)[begin + j] = rep2[j];
(*pos)[begin + j] = pos2[j];
(*cut)[begin + j] = cut2[j];
}
}
prep_word[i + 2] = word[i + 1];
if (*rep && *pos && *cut && (*rep)[i]) {
size_t offset = 1;
strncpy(prep_word + offset, word, prep_word_size - offset - 1);
prep_word[prep_word_size - 1] = '\0';
}
}
begin = i + 1;
for (j = 0; j < word_size; j++) rep2[j] = NULL;
}
/* non-compound */
if (begin == 0) {
hnj_hyphen_hyph_(dict->nextlevel, word, word_size,
hyphens, rep, pos, cut, clhmin, crhmin, lend, rend);
if (!lend) hnj_hyphen_lhmin(dict->utf8, word, word_size, hyphens,
rep, pos, cut, clhmin);
if (!rend) hnj_hyphen_rhmin(dict->utf8, word, word_size, hyphens,
rep, pos, cut, crhmin);
}
free(rep2);
free(cut2);
free(pos2);
free(hyphens2);
}
hnj_free (prep_word);
return 0;
}
/* UTF-8 normalization of hyphen and non-standard positions */
int hnj_hyphen_norm(const char *word, int word_size, char * hyphens,
char *** rep, int ** pos, int ** cut)
{
int i, j, k;
if ((((unsigned char) word[0]) >> 6) == 2) {
fprintf(stderr, "error - bad, non UTF-8 input: %s\n", word);
return 1;
}
/* calculate UTF-8 character positions */
for (i = 0, j = -1; i < word_size; i++) {
/* beginning of an UTF-8 character (not '10' start bits) */
if ((((unsigned char) word[i]) >> 6) != 2) j++;
hyphens[j] = hyphens[i];
if (rep && pos && cut && *rep && *pos && *cut) {
int l = (*pos)[i];
(*pos)[j] = 0;
for (k = 0; k < l; k++) {
if ((((unsigned char) word[i - k]) >> 6) != 2) (*pos)[j]++;
}
k = i - l + 1;
l = k + (*cut)[i];
(*cut)[j] = 0;
for (; k < l; k++) {
if ((((unsigned char) word[k]) >> 6) != 2) (*cut)[j]++;
}
(*rep)[j] = (*rep)[i];
if (j < i) {
(*rep)[i] = NULL;
(*pos)[i] = 0;
(*cut)[i] = 0;
}
}
}
hyphens[j + 1] = '\0';
#ifdef VERBOSE
printf ("nums: %s\n", hyphens);
#endif
return 0;
}
/* get the word with all possible hyphenations (output: hyphword) */
void hnj_hyphen_hyphword(const char * word, int word_size, const char * hyphens,
char * hyphword, char *** rep, int ** pos, int ** cut)
{
if (word_size <= 0 || word_size > INT_MAX / 2) {
hyphword[0] = '\0';
return;
}
/* hyphword buffer size must be at least 2 * l */
int hyphword_size = 2 * word_size - 1;
int nonstandard = 0;
if (*rep && *pos && *cut) {
nonstandard = 1;
}
int i;
int j = 0;
for (i = 0; i < word_size && j < hyphword_size; i++) {
hyphword[j++] = word[i];
if (hyphens[i]&1 && j < hyphword_size) {
if (nonstandard && (*rep)[i] && j >= (*pos)[i]) {
/* non-standard */
j -= (*pos)[i];
char *s = (*rep)[i];
while (*s && j < hyphword_size) {
hyphword[j++] = *s++;
}
i += (*cut)[i] - (*pos)[i];
} else {
/* standard */
hyphword[j++] = '=';
}
}
}
hyphword[j] = '\0';
}
/* main api function with default hyphenmin parameters */
int hnj_hyphen_hyphenate2 (HyphenDict *dict,
const char *word, int word_size, char * hyphens,
char *hyphword, char *** rep, int ** pos, int ** cut)
{
hnj_hyphen_hyph_(dict, word, word_size, hyphens, rep, pos, cut,
dict->clhmin, dict->crhmin, 1, 1);
hnj_hyphen_lhmin(dict->utf8, word, word_size,
hyphens, rep, pos, cut, (dict->lhmin > 0 ? dict->lhmin : 2));
hnj_hyphen_rhmin(dict->utf8, word, word_size,
hyphens, rep, pos, cut, (dict->rhmin > 0 ? dict->rhmin : 2));
/* nohyphen */
if (dict->nohyphen) {
char * nh = dict->nohyphen;
int nhi;
for (nhi = 0; nhi <= dict->nohyphenl; nhi++) {
char * nhy = (char *) strstr(word, nh);
while (nhy) {
hyphens[nhy - word + strlen(nh) - 1] = '0';
if (nhy - word - 1 >= 0) hyphens[nhy - word - 1] = '0';
nhy = (char *) strstr(nhy + 1, nh);
}
nh = nh + strlen(nh) + 1;
}
}
if (hyphword) hnj_hyphen_hyphword(word, word_size, hyphens, hyphword, rep, pos, cut);
if (dict->utf8) return hnj_hyphen_norm(word, word_size, hyphens, rep, pos, cut);
#ifdef VERBOSE
printf ("nums: %s\n", hyphens);
#endif
return 0;
}
/* previous main api function with hyphenmin parameters */
int hnj_hyphen_hyphenate3 (HyphenDict *dict,
const char *word, int word_size, char * hyphens,
char *hyphword, char *** rep, int ** pos, int ** cut,
int lhmin, int rhmin, int clhmin, int crhmin)
{
lhmin = (lhmin > dict->lhmin) ? lhmin : dict->lhmin;
rhmin = (rhmin > dict->rhmin) ? rhmin : dict->rhmin;
clhmin = (clhmin > dict->clhmin) ? clhmin : dict->clhmin;
crhmin = (crhmin > dict->crhmin) ? crhmin : dict->crhmin;
hnj_hyphen_hyph_(dict, word, word_size, hyphens, rep, pos, cut,
clhmin, crhmin, 1, 1);
hnj_hyphen_lhmin(dict->utf8, word, word_size, hyphens,
rep, pos, cut, (lhmin > 0 ? lhmin : 2));
hnj_hyphen_rhmin(dict->utf8, word, word_size, hyphens,
rep, pos, cut, (rhmin > 0 ? rhmin : 2));
if (hyphword) hnj_hyphen_hyphword(word, word_size, hyphens, hyphword, rep, pos, cut);
/* nohyphen */
if (dict->nohyphen) {
char * nh = dict->nohyphen;
int nhi;
for (nhi = 0; nhi <= dict->nohyphenl; nhi++) {
char * nhy = (char *) strstr(word, nh);
while (nhy) {
hyphens[nhy - word + strlen(nh) - 1] = 0;
if (nhy - word - 1 >= 0) hyphens[nhy - word - 1] = 0;
nhy = (char *) strstr(nhy + 1, nh);
}
nh = nh + strlen(nh) + 1;
}
}
if (dict->utf8) return hnj_hyphen_norm(word, word_size, hyphens, rep, pos, cut);
return 0;
}
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