/***************************************************************************
 *   Copyright (C) 2005 to 2007 by Jonathan Duddington                     *
 *   email: jonsd@users.sourceforge.net                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write see:                           *
 *               <http://www.gnu.org/licenses/>.                           *
 ***************************************************************************/

#include "StdAfx.h"

#define LOG_TRANSLATE
 
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include <wctype.h>
////#include <wchar.h>

#include "speak_lib.h"
#include "speech.h"
#include "phoneme.h"
#include "synthesize.h"
#include "translate.h"


int dictionary_skipwords;
char dictionary_name[40];

extern MNEM_TAB mnem_flags[];
extern PHONEME_TAB_LIST phoneme_tab_list[N_PHONEME_TABS];

// accented characters which indicate (in some languages) the start of a separate syllable
//static const unsigned short diereses_list[7] = {L'ä',L'ë',L'ď',L'ö',L'ü',L'˙',0};
static const unsigned short diereses_list[7] = {0xe4,0xeb,0xef,0xf6,0xfc,0xff,0};

// convert characters to an approximate 7 bit ascii equivalent
// used for checking for vowels
static unsigned char remove_accent[] = {
'a','a','a','a','a','a','a','c','e','e','e','e','i','i','i','i',  // 0c0
'd','n','o','o','o','o','o', 0, 'o','u','u','u','u','y','t','s',  // 0d0
'a','a','a','a','a','a','a','c','e','e','e','e','i','i','i','i',  // 0e0
'd','n','o','o','o','o','o', 0 ,'o','u','u','u','u','y','t','y',  // 0f0

'a','a','a','a','a','a','c','c','c','c','c','c','c','c','d','d',  // 100
'd','d','e','e','e','e','e','e','e','e','e','e','g','g','g','g',  // 110
'g','g','g','g','h','h','h','h','i','i','i','i','i','i','i','i',  // 120
'i','i','i','i','j','j','k','k','k','l','l','l','l','l','l','l',  // 130
'l','l','l','n','n','n','n','n','n','n','n','n','o','o','o','o',  // 140
'o','o','o','o','r','r','r','r','r','r','s','s','s','s','s','s',  // 150
's','s','t','t','t','t','t','t','u','u','u','u','u','u','u','u',  // 160
'u','u','u','u','w','w','y','y','y','z','z','z','z','z','z','s',  // 170
'b','b','b','b', 0,  0, 'o','c','c','d','d','d','d','d','e','e',  // 180
'e','f','f','g','g','h','i','i','k','k','l','l','m','n','n','o',  // 190
'o','o','o','o','p','p','y', 0,  0, 's','s','t','t','t','t','u',  // 1a0
'u','u','v','y','y','z','z','z','z','z','z','z', 0,  0,  0, 'w',  // 1b0
't','t','t','k','d','d','d','l','l','l','n','n','n','a','a','i',  // 1c0
'i','o','o','u','u','u','u','u','u','u','u','u','u','e','a','a',  // 1d0
'a','a','a','a','g','g','g','g','k','k','o','o','o','o','z','z',  // 1e0
'j','d','d','d','g','g','w','w','n','n','a','a','a','a','o','o',  // 1f0

'a','a','a','a','e','e','e','e','i','i','i','i','o','o','o','o',  // 200
'r','r','r','r','u','u','u','u','s','s','t','t','y','y','h','h',  // 210
'n','d','o','o','z','z','a','a','e','e','o','o','o','o','o','o',  // 220
'o','o','y','y','l','n','t','j','d','q','a','c','c','l','t','s',  // 230
'z', 0 };




void strncpy0(char *to,const char *from, int size)
{//===============================================
	// strcpy with limit, ensures a zero terminator
	strncpy(to,from,size);
	to[size-1] = 0;
}


static int reverse_word_bytes(int word)
{//=============================
	// reverse the order of bytes from little-endian to big-endian
#ifdef ARCH_BIG
	int ix;
	int word2 = 0;

	for(ix=0; ix<=24; ix+=8)
	{
		word2 = word2 << 8;
		word2 |= (word >> ix) & 0xff;
	}
	return(word2);
#else
	return(word);
#endif
}


int LookupMnem(MNEM_TAB *table, char *string)
{//==========================================
	while(table->mnem != NULL)
	{
		if(strcmp(string,table->mnem)==0)
			return(table->value);
		table++;
	}
	return(table->value);
}

const char *LookupMnem(MNEM_TAB *table, int value)
{//===============================================
	while(table->mnem != NULL)
	{
		if(table->value == value)
			return(table->mnem);
		table++;
	}
	return("");
}



//=============================================================================================
//   Read pronunciation rules and pronunciation lookup dictionary
//
//=============================================================================================



int Translator::LoadDictionary(const char *name, int no_error)
{//===========================================================
	int hash;
	char *p;
	int *pw;
	int length;
	FILE *f;
	unsigned int size;
	char fname[sizeof(path_home)+20];

	strcpy(dictionary_name,name);   // currently loaded dictionary name

	if(no_error)   // don't load dictionary, just set the dictionary_name
		return(1);

	// Load a pronunciation data file into memory
	// bytes 0-3:  offset to rules data
	// bytes 4-7:  number of hash table entries
	sprintf(fname,"%s%c%s_dict",path_home,PATHSEP,name);
	size = GetFileLength(fname);

	f = fopen(fname,"rb");
	if((f == NULL) || (size <= 0))
	{
		if(no_error == 0)
		{
			fprintf(stderr,"Can't read dictionary file: '%s'\n",fname);
		}
		return(1);
	}

	if(data_dictlist != NULL)
		Free(data_dictlist);

	data_dictlist = Alloc(size);
	fread(data_dictlist,size,1,f);
	fclose(f);


	pw = (int *)data_dictlist;
	length = reverse_word_bytes(pw[1]);

	if(size <= (N_HASH_DICT + sizeof(int)*2))
	{
		fprintf(stderr,"Empty _dict file: '%s\n",fname);
		return(2);
	}

	if((reverse_word_bytes(pw[0]) != N_HASH_DICT) ||
	   (length <= 0) || (length > 0x8000000))
	{
		fprintf(stderr,"Bad data: '%s' (%x length=%x)\n",fname,reverse_word_bytes(pw[0]),length);
		return(2);
	}
	data_dictrules = &data_dictlist[length];

	// set up indices into data_dictrules
	InitGroups();
	if(groups1[0] == NULL)
	{
		fprintf(stderr,"Error in %s_rules, no default rule group\n",name);
	}

	// set up hash table for data_dictlist
	p = &data_dictlist[8];

	for(hash=0; hash<N_HASH_DICT; hash++)
	{
		dict_hashtab[hash] = p;
		while((length = *p) != 0)
		{
			p += length;
		}
		p++;   // skip over the zero which terminates the list for this hash value
	}

	return(0);
}  //  end of LoadDictionary


void Translator::InitGroups(void)
{//==============================
/* Called after dictionary 1 is loaded, to set up table of entry points for translation rule chains
	for single-letters and two-letter combinations
*/

	int  ix;
	char *p;
	char *p_name;
	unsigned int *pw;
	unsigned char c, c2;
	int len;

	n_groups2 = 0;
	for(ix=0; ix<256; ix++)
	{
		groups1[ix]=NULL;
		groups2_count[ix]=0;
		groups2_start[ix]=255;  // indicates "not set"
	}
	memset(letterGroups,0,sizeof(letterGroups));

	p = data_dictrules;
	while(*p != 0)
	{
		if(*p != RULE_GROUP_START)
		{
			fprintf(stderr,"Bad rules data in '%s_dict' at 0x%x\n",dictionary_name,(unsigned int)(p-data_dictrules));
			break;
		}
		p++;

		if(p[0] == RULE_REPLACEMENTS)
		{
			pw = (unsigned int *)(((long)p+4) & ~3);  // advance to next word boundary
			langopts.replace_chars = pw;
			while(pw[0] != 0)
			{
				pw += 2;   // find the end of the replacement list, each entry is 2 words.
			}
			p = (char *)(pw+1);

#ifdef ARCH_BIG
			pw = (unsigned int *)langopts.replace_chars;
			while(*pw != 0)
			{
				*pw = reverse_word_bytes(*pw);
				pw++;
				*pw = reverse_word_bytes(*pw);
				pw++;
			}
#endif
			continue;
		}

		if(p[0] == RULE_LETTERGP2)
		{
			ix = p[1] - 'A';
			p += 2;
			if((ix >= 0) && (ix < N_LETTER_GROUPS))
			{
				letterGroups[ix] = p;
			}
		}
		else
		{
			len = strlen(p);
			p_name = p;
			c = p_name[0];
			
			p += (len+1);
			if(len == 1)
			{
				groups1[c] = p;
			}
			else
			if(len == 0)
			{
				groups1[0] = p;
			}
			else
			{
				if(groups2_start[c] == 255)
					groups2_start[c] = n_groups2;
	
				groups2_count[c]++;
				groups2[n_groups2] = p;
				c2 = p_name[1];
				groups2_name[n_groups2++] = (c + (c2 << 8));
			}
		}

		// skip over all the rules in this group
		while(*p != RULE_GROUP_END)
		{
			p += (strlen(p) + 1);
		}
		p++;
	}

}  //  end of InitGroups


int HashDictionary(const char *string)
//====================================
/* Generate a hash code from the specified string
	This is used to access the dictionary_2 word-lookup dictionary
*/
{
   int  c;
	int  chars=0;
   int  hash=0;

   while((c = (*string++ & 0xff)) != 0)
   {
      hash = hash * 8 + c;
      hash = (hash & 0x3ff) ^ (hash >> 8);    /* exclusive or */
		chars++;
   }

   return((hash+chars) & 0x3ff);  // a 10 bit hash code
}   //  end of HashDictionary



//=============================================================================================
//   Translate between internal representation of phonemes and a mnemonic form for display
//
//=============================================================================================



char *EncodePhonemes(char *p, char *outptr, unsigned char *bad_phoneme)
/*********************************************************************/
/* Translate a phoneme string from ascii mnemonics to internal phoneme numbers,
   from 'p' up to next blank .
   Returns advanced 'p'
   outptr contains encoded phonemes, unrecognised phonemes are encoded as 255
   bad_phoneme must point to char array of length 2 of more
*/
{
	int ix;
	unsigned char  c;
	int  count;    /* num. of matching characters */
	int  max;      /* highest num. of matching found so far */
	int  max_ph;   /* corresponding phoneme with highest matching */
	int  consumed;
	unsigned int  mnemonic_word;

	bad_phoneme[0] = 0;

	// skip initial blanks
	while(isspace(*p))
	{
		p++;
	}

	while(((c = *p) != 0) && !isspace(c))
	{
		consumed = 0;

		switch(c)
		{
		case '|':
			// used to separate phoneme mnemonics if needed, to prevent characters being treated
			// as a multi-letter mnemonic

			if((c = p[1]) == '|')
			{
				// treat double || as a word-break symbol, drop through
            // to the default case with c = '|'
			}
			else
			{
				p++;
				break;
			}

		default:
			// lookup the phoneme mnemonic, find the phoneme with the highest number of
			// matching characters
			max= -1;
			max_ph= 0;

			for(ix=1; ix<n_phoneme_tab; ix++)
			{
				if(phoneme_tab[ix] == NULL)
					continue;
				if(phoneme_tab[ix]->type == phINVALID)
					continue;       // this phoneme is not defined for this language

				count = 0;
				mnemonic_word = phoneme_tab[ix]->mnemonic;

				while(((c = p[count]) > ' ') && (count < 4) &&
										(c == ((mnemonic_word >> (count*8)) & 0xff)))
					count++;

				if((count > max) &&
					((count == 4) || (((mnemonic_word >> (count*8)) & 0xff)==0)))
				{
					max = count;
					max_ph = phoneme_tab[ix]->code;
				}
			}

			if(max_ph == 0)
			{
				max_ph = 255;   /* not recognised */
				bad_phoneme[0] = *p;
				bad_phoneme[1] = 0;
			}

			if(max <= 0)
				max = 1;
			p += (consumed + max);
			*outptr++ = (char)(max_ph);

			if(max_ph == phonSWITCH)
			{
				// Switch Language: this phoneme is followed by a text string
				char *p_lang = outptr;
				while(!isspace(c = *p) && (c != 0))
				{
					p++;
					*outptr++ = tolower(c);
				}
				*outptr = 0;
				if(c == 0)
				{
					if(strcmp(p_lang,"en")==0)
					{
						*p_lang = 0;   // don't need "en", it's assumed by default
						return(p);
					}
				}
				else
				{
					*outptr++ = '|';  // more phonemes follow, terminate language string with separator
				}
			}
			break;
		}
	}
	/* terminate the encoded string */
	*outptr = 0;
	return(p);
}   // end of EncodePhonemes



void DecodePhonemes(const char *inptr, char *outptr)
//==================================================
// Translate from internal phoneme codes into phoneme mnemonics
{
	unsigned char phcode;
	unsigned char c;
	unsigned int  mnem;
	PHONEME_TAB *ph;
	static const char *stress_chars = "==,,'*  ";

	while((phcode = *inptr++) > 0)
	{
		if(phcode == 255)
			continue;     /* indicates unrecognised phoneme */
		if((ph = phoneme_tab[phcode]) == NULL)
			continue;
	
		if((ph->type == phSTRESS) && (ph->std_length <= 4) && (ph->spect == 0))
		{
			if(ph->std_length > 1)
				*outptr++ = stress_chars[ph->std_length];
		}
		else
		{
			mnem = ph->mnemonic;

			while((c = (mnem & 0xff)) != 0)	
			{
				*outptr++ = c;
				mnem = mnem >> 8;
			}
			if(phcode == phonSWITCH)
			{
				while(isalpha(*inptr))
				{
					*outptr++ = *inptr++;
				}
			}
		}
	}
	*outptr = 0;    /* string terminator */
}   //  end of DecodePhonemes



void Translator::WriteMnemonic(int *ix, int mnem)
{//==============================================
	unsigned char c;

	while((c = mnem & 0xff) != 0)
	{
		if((c == '/') && (option_phoneme_variants==0))
			break;      // discard phoneme variant indicator
		phon_out[(*ix)++]= c;
	//	phon_out[phon_out_ix++]= ipa1[c];
		mnem = mnem >> 8;
	}
}


void Translator::GetTranslatedPhonemeString(char *phon_out, int n_phon_out)
{//========================================================================
/* Can be called after a clause has been translated into phonemes, in order
   to display the clause in phoneme mnemonic form.
*/

	int  ix;
	int  phon_out_ix=0;
	int  stress;
	char *p;
	PHONEME_LIST *plist;
	
	static const char *stress_chars = "==,,''";

	if(phon_out != NULL)
	{
		for(ix=1; ix<(n_phoneme_list-2) && (phon_out_ix < (n_phon_out - 6)); ix++)
		{
			plist = &phoneme_list[ix];
			if(plist->newword)
				phon_out[phon_out_ix++] = ' ';

			if(plist->synthflags & SFLAG_SYLLABLE)
			{
				if((stress = plist->tone) > 1)
				{
					if(stress > 5) stress = 5;
					phon_out[phon_out_ix++] = stress_chars[stress];
				}
			}
			WriteMnemonic(&phon_out_ix,plist->ph->mnemonic);

			if(plist->synthflags & SFLAG_LENGTHEN)
			{
				WriteMnemonic(&phon_out_ix,phoneme_tab[phonLENGTHEN]->mnemonic);
			}
			if((plist->synthflags & SFLAG_SYLLABLE) && (plist->type != phVOWEL))
			{
				// syllablic consonant
				WriteMnemonic(&phon_out_ix,phoneme_tab[phonSYLLABIC]->mnemonic);
			}
			if(plist->ph->code == phonSWITCH)
			{
				// the tone_ph field contains a phoneme table number
				p = phoneme_tab_list[plist->tone_ph].name;
				while(*p != 0)
				{
					phon_out[phon_out_ix++] = *p++;
				}
				phon_out[phon_out_ix++] = ' ';
			}
			else
			if(plist->tone_ph > 0)
			{
				WriteMnemonic(&phon_out_ix,phoneme_tab[plist->tone_ph]->mnemonic);
			}
		}
	
		if(phon_out_ix >= n_phon_out)
			phon_out_ix = n_phon_out - 1;
		phon_out[phon_out_ix] = 0;
	}
}  // end of Translator::GetTranslatedPhonemeString



//=============================================================================================
//   Is a word Unpronouncable - and so should be spoken as individual letters
//
//=============================================================================================


#ifdef deleted
// this is the initials_bitmap for english
static unsigned char initials_bitmap[86] = {
 0x00, 0x00, 0x00, 0x00, 0x22, 0x08, 0x00, 0x88,  //  0
 0x20, 0x24, 0x20, 0x80, 0x10, 0x00, 0x00, 0x00,
 0x00, 0x28, 0x08, 0x00, 0x88, 0x22, 0x04, 0x00,  // 16
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 0x00, 0x88, 0x22, 0x04, 0x00, 0x02, 0x00, 0x00,  // 32
 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 0x00, 0x28, 0x8a, 0x03, 0x00, 0x00, 0x40, 0x00,  // 48
 0x02, 0x00, 0x41, 0xca, 0x9b, 0x06, 0x20, 0x80,
 0x91, 0x00, 0x00, 0x00, 0x00, 0x20, 0x08, 0x00,  // 64
 0x08, 0x20, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
 0x00, 0x00, 0x22, 0x00, 0x01, 0x00, };
#endif


int Translator::Unpronouncable(char *word)
{//=======================================
/* Determines whether a word in 'unpronouncable', i.e. whether it should
	be spoken as individual letters.

	This function may be language specific. This is a generic version.
*/

	int  c;
	int  c1=0;
	int  vowel_posn=9;
	int  index;
	int  count;
	int  apostrophe=0;

	if(langopts.param[LOPT_UNPRONOUNCABLE] == 1)
		return(0);

	if((*word == ' ') || (*word == 0))
		return(0);

	index = 0;
	count = 0;
	for(;;)
	{
		index += utf8_in(&c,&word[index],0);
		if((c==0) || (c==' '))
			break;

		if(count==0)
			c1 = c;
		count++;

		if(IsVowel(c))
		{
			vowel_posn = count;    // position of the first vowel
			break;
		}

		if(c == '\'')
			apostrophe = 1;
		else
		if(!iswalpha(c))
			return(0);        // letter (not vowel) outside a-z range or apostrophe, abort test
	}

	if((vowel_posn < 9) && (langopts.param[LOPT_UNPRONOUNCABLE] == 2))
		return(0);   // option means allow any word with a vowel

	if(c1 == langopts.param[LOPT_UNPRONOUNCABLE])
		vowel_posn--;   // disregard this as the initial letter when counting

	if(vowel_posn > (langopts.max_initial_consonants+1))
		return(1);  // no vowel, or no vowel in first four letters

return(0);

}   /* end of Unpronounceable */



int Translator::IsLetterGroup(char *word, int group, int pre)
{//==========================================================
	// match the word against a list of utf-8 strings
	char *p;
	char *w;

	p = letterGroups[group];

	while(*p != RULE_GROUP_END)
	{
		w = word;
		while(*p == *w)
		{
			w++;
			p++;
		}
		if(*p == 0)
			return(w-word);   // matched a complete string

		while(*p++ != 0);  // skip to end of string
	}
	return(0);
}


int Translator::IsLetter(int letter, int group)
{//============================================
	int letter2;

	if(letter_groups[group] != NULL)
	{
		if(wcschr(letter_groups[group],letter))
			return(1);
		return(0);
	}

	if(group > 7)
		return(0);

	if(letter_bits_offset > 0)
	{
		if(((letter2 = (letter - letter_bits_offset)) > 0) && (letter2 < 0x80))
				letter = letter2;
		else
			return(0);
	}
	else
	{
		if((letter >= 0xc0) && (letter <= 0x241))
			return(letter_bits[remove_accent[letter-0xc0]] & (1L << group));
	}

	if((letter >= 0) && (letter < 0x80))
		return(letter_bits[letter] & (1L << group));

	return(0);
}


int Translator::IsVowel(int letter)
{//================================
	return(IsLetter(letter,0));
}

void SetLetterVowel(Translator *tr, int c)
{//=======================================
	tr->letter_bits[c] = (tr->letter_bits[c] & 0x40) | 0x81;  // keep value for group 6 (front vowels e,i,y)
}

void ResetLetterBits(Translator *tr, int groups)
{//=============================================
// Clear all the specified groups
	unsigned int ix;
	unsigned int mask;

	mask = ~groups;

	for(ix=0; ix<sizeof(tr->letter_bits); ix++)
	{
		tr->letter_bits[ix] &= mask;
	}
}


void SetLetterBits(Translator *tr, int group, const char *string)
{//==============================================================
	int bits;
	unsigned char c;
	
	bits = (1L << group);
	while((c = *string++) != 0)
		tr->letter_bits[c] |= bits;
}

void SetLetterBitsRange(Translator *tr, int group, int first, int last)
{//====================================================================
	int bits;
	int ix;

	bits = (1L << group);
	for(ix=first; ix<=last; ix++)
	{
		tr->letter_bits[ix] |= bits;
	}
}



//=============================================================================================
//   Determine the stress pattern of a word
//
//=============================================================================================



static int GetVowelStress(Translator *tr, unsigned char *phonemes, unsigned char *vowel_stress, int &vowel_count, int &stressed_syllable, int control)
{//====================================================================================================================================================
// control = 1, set stress to 1 for forced unstressed vowels
	unsigned char phcode;
	PHONEME_TAB *ph;
	unsigned char *ph_out = phonemes;
	int count = 1;
	int max_stress = 0;
	int ix;
	int j;
	int stress = 0;
	int primary_posn = 0;

	vowel_stress[0] = 0;
	while(((phcode = *phonemes++) != 0) && (count < (N_WORD_PHONEMES/2)-1))
	{
		if((ph = phoneme_tab[phcode]) == NULL)
			continue;

		if((ph->type == phSTRESS) && (ph->spect == 0))
		{
			/* stress marker, use this for the following vowel */

			if(phcode == phonSTRESS_PREV)
			{
				/* primary stress on preceeding vowel */
				j = count - 1;
				while((j > 0) && (stressed_syllable == 0) && (vowel_stress[j] < 4))
				{
					if(vowel_stress[j] != 1)
					{
						// don't promote a phoneme which must be unstressed
						vowel_stress[j] = 4;

						if(max_stress < 4)
						{
							max_stress = 4;
							primary_posn = j;
						}
	
						/* reduce any preceding primary stress markers */
						for(ix=1; ix<j; ix++)
						{
							if(vowel_stress[ix] == 4)
								vowel_stress[ix] = 3;
						}
						break;
					}
					j--;
				}
			}
			else
			{
				if((ph->std_length < 4) || (stressed_syllable == 0))
				{
					stress = ph->std_length;

					if(stress > max_stress)
						max_stress = stress;
				}
			}
			continue;
		}

		if((ph->type == phVOWEL) && !(ph->phflags & phNONSYLLABIC))
		{
			vowel_stress[count] = (char)stress;
			if((stress >= 4) && (stress >= max_stress))
			{
				primary_posn = count;
				max_stress = stress;
			}

			if((stress == 0) && (control & 1) && (ph->phflags & phUNSTRESSED))
				vowel_stress[count] = 1;   /* weak vowel, must be unstressed */

			count++;
			stress = 0;
		}
		else
		if(phcode == phonSYLLABIC)
		{
			// previous consonant phoneme is syllablic
			vowel_stress[count] = (char)stress;
			if((stress == 0) && (control & 1))
				vowel_stress[count++] = 1;    // syllabic consonant, usually unstressed
		}

		*ph_out++ = phcode;
	}
	vowel_stress[count] = 0;
	*ph_out = 0;

	/* has the position of the primary stress been specified by $1, $2, etc? */
	if(stressed_syllable > 0)
	{
		if(stressed_syllable >= count)
			stressed_syllable = count-1;   // the final syllable

		vowel_stress[stressed_syllable] = 4;
		max_stress = 4;
		primary_posn = stressed_syllable;
	}

	if(max_stress == 5)
	{
		// priority stress, replaces any other primary stress marker
		for(ix=1; ix<count; ix++)
		{
			if(vowel_stress[ix] == 4)
			{
				if(tr->langopts.stress_flags & 0x20000)
					vowel_stress[ix] = 0;
				else
					vowel_stress[ix] = 3;
			}

			if(vowel_stress[ix] == 5)
			{
				vowel_stress[ix] = 4;
				primary_posn = ix;
			}
		}
		max_stress = 4;
	}

	stressed_syllable = primary_posn;
	vowel_count = count;
	return(max_stress);
}  // end of GetVowelStress



static char stress_phonemes[] = {phonSTRESS_U, phonSTRESS_D, phonSTRESS_2, phonSTRESS_3,
		phonSTRESS_P, phonSTRESS_P2, phonSTRESS_TONIC};


void ChangeWordStress(Translator *tr, char *word, int new_stress)
{//==============================================================
	int ix;
	unsigned char *p;
	int  max_stress;
	int  vowel_count;              // num of vowels + 1
	int  stressed_syllable=0;      // position of stressed syllable
	unsigned char phonetic[N_WORD_PHONEMES];
	unsigned char vowel_stress[N_WORD_PHONEMES/2];

	strcpy((char *)phonetic,word);
	max_stress = GetVowelStress(tr, phonetic, vowel_stress, vowel_count, stressed_syllable, 0);

	if(new_stress >= 4)
	{
		// promote to primary stress
		for(ix=1; ix<vowel_count; ix++)
		{
			if(vowel_stress[ix] >= max_stress)
			{
				vowel_stress[ix] = new_stress;
				break;
			}
		}
	}
	else
	{
		// remove primary stress
		for(ix=1; ix<vowel_count; ix++)
		{
			if(vowel_stress[ix] > new_stress)   // >= allows for diminished stress (=1)
				vowel_stress[ix] = new_stress;
		}
	}

	// write out phonemes
	ix = 1;
	p = phonetic;
	while(*p != 0)
	{
		if((phoneme_tab[*p]->type == phVOWEL) && !(phoneme_tab[*p]->phflags & phNONSYLLABIC))
		{
			if(vowel_stress[ix] != 0)
				*word++ = stress_phonemes[vowel_stress[ix]];

			ix++;
		}
		*word++ = *p++;
	}
	*word = 0;
}  // end of ChangeWordStress



void Translator::SetWordStress(char *output, unsigned int dictionary_flags, int tonic, int prev_stress)
{//===================================================================================================
/* Guess stress pattern of word.  This is language specific

   'dictionary_flags' has bits 0-3   position of stressed vowel (if > 0)
                                     or unstressed (if == 7) or syllables 1 and 2 (if == 6)
                          bits 8...  dictionary flags

   If 'tonic' is set (>= 0), replace highest stress by this value.

   Parameter used for input and output
*/

	unsigned char phcode;
	unsigned char *p;
	PHONEME_TAB *ph;
	int  stress;
	int  max_stress;
	int  vowel_count;      // num of vowels + 1
	int  ix;
	int  v;
	int  v_stress;
	int  stressed_syllable;      // position of stressed syllable
	int  max_stress_posn;
	int  unstressed_word = 0;
	char *max_output;
	int final_ph;
	int mnem;
	int post_tonic;
	int opt_length;
	int done;

	unsigned char vowel_stress[N_WORD_PHONEMES/2];
	char syllable_weight[N_WORD_PHONEMES/2];
	unsigned char phonetic[N_WORD_PHONEMES];

	static char consonant_types[16] = {0,0,0,1,1,1,1,1,1,1,0,0,0,0,0,0};


	/* stress numbers  STRESS_BASE +
		0  diminished, unstressed within a word
		1  unstressed, weak
		2
		3  secondary stress
		4  main stress */

	/* copy input string into internal buffer */
	for(ix=0; ix<N_WORD_PHONEMES; ix++)
	{
		phonetic[ix] = output[ix];
		// check for unknown phoneme codes
		if(phonetic[ix] >= n_phoneme_tab)
			phonetic[ix] = phonSCHWA;
		if(phonetic[ix] == 0)
			break;
	}
	if(ix == 0) return;
	final_ph = phonetic[ix-1];

	max_output = output + (N_WORD_PHONEMES-3);   /* check for overrun */

	// any stress position marked in the xx_list dictionary ? 
	stressed_syllable = dictionary_flags & 0x7;
	if(dictionary_flags & 0x8)
	{
		// this indicates a word without a primary stress
		stressed_syllable = dictionary_flags & 0x3;
		unstressed_word = 1;
	}

	max_stress = GetVowelStress(this, phonetic, vowel_stress, vowel_count, stressed_syllable, 1);

	// heavy or light syllables
	ix = 1;
	for(p = phonetic; *p != 0; p++)
	{
		if((phoneme_tab[p[0]]->type == phVOWEL) && !(phoneme_tab[p[0]]->phflags & phNONSYLLABIC))
		{
			int weight = 0;
			int lengthened = 0;

			if(phoneme_tab[p[1]]->code == phonLENGTHEN)
				lengthened = 1;

			if(lengthened || (phoneme_tab[p[0]]->phflags & phLONG))
			{
				// long vowel, increase syllable weight
				weight++;
			}

			if(lengthened) p++;  // advance over phonLENGTHEN

			if(consonant_types[phoneme_tab[p[1]]->type] && ((phoneme_tab[p[2]]->type != phVOWEL) || (phoneme_tab[p[1]]->phflags & phLONG)))
			{
				// followed by two consonants, a long consonant, or consonant and end-of-word
				weight++;
			}
			syllable_weight[ix] = weight;
			ix++;
		}
	}
	
	switch(langopts.stress_rule)
	{
	case 8:
		// stress on first syllable, unless it is a light syllable
		if(syllable_weight[1] > 0)
			break;
		// else drop through to case 1
	case 1:
		// stress on second syllable
		if((stressed_syllable == 0) && (vowel_count > 2))
		{
			stressed_syllable = 2;
			if(max_stress == 0)
			{
				vowel_stress[stressed_syllable] = 4;
			}
			max_stress = 4;
		}
		break;

	case 2:
		// a language with stress on penultimate vowel

		if(stressed_syllable == 0)
		{
			/* no explicit stress - stress the penultimate vowel */
			max_stress = 4;

			if(vowel_count > 2)
			{
				stressed_syllable = vowel_count - 2;

				if(langopts.stress_flags & 0x300)
				{
					// LANG=Spanish, stress on last vowel if the word ends in a consonant other than 'n' or 's'
					if(phoneme_tab[final_ph]->type != phVOWEL)
					{
						if(langopts.stress_flags & 0x100)
						{
							stressed_syllable = vowel_count - 1;
						}
						else
						{
							mnem = phoneme_tab[final_ph]->mnemonic;
							if((mnem != 'n') && (mnem != 's'))
							{
								stressed_syllable = vowel_count - 1;
							}
						}
					}
				}

				if(vowel_stress[stressed_syllable] == 1)
				{
					// but this vowel is explicitly marked as unstressed
					if(stressed_syllable > 1)
						stressed_syllable--;
					else
						stressed_syllable++;
				}
			}
			else
			{
				stressed_syllable = 1;
				if(langopts.stress_flags & 0x1)
					max_stress = 3;   // don't give full stress to monosyllables
			}

			// only set the stress if it's not already marked explicitly
			if(vowel_stress[stressed_syllable] == 0)
			{
				// don't stress if next and prev syllables are stressed
				if((vowel_stress[stressed_syllable-1] < 4) || (vowel_stress[stressed_syllable+1] < 4))
					vowel_stress[stressed_syllable] = max_stress;
			}
		}
		break;

   case 3:
		// stress on last vowel
		if(stressed_syllable == 0)
		{
			/* no explicit stress - stress the final vowel */
			stressed_syllable = vowel_count - 1;
			if(max_stress == 0)
			{
				while(stressed_syllable > 0)
				{
					if(vowel_stress[stressed_syllable] == 0)
					{
						vowel_stress[stressed_syllable] = 4;
						break;
					}
					else
						stressed_syllable--;
				}
			}
			max_stress = 4;
		}
		break;

	case 4:   // stress on antipenultimate vowel
		if(stressed_syllable == 0)
		{
			stressed_syllable = vowel_count - 3;
			if(stressed_syllable < 1)
				stressed_syllable = 1;

			if(max_stress == 0)
			{
				vowel_stress[stressed_syllable] = 4;
			}
			max_stress = 4;
		}
		break;

	case 5:
		// LANG=Russian
		if(stressed_syllable == 0)
		{
			/* no explicit stress - guess the stress from the number of syllables */
			static char guess_ru[16] =   {0,0,1,1,2,3,3,4,5,6,7,7,8,9,10,11};
			static char guess_ru_v[16] = {0,0,1,1,2,2,3,3,4,5,6,7,7,8,9,10};  // for final phoneme is a vowel
			static char guess_ru_t[16] = {0,0,1,2,3,3,3,4,5,6,7,7,7,8,9,10};  // for final phoneme is an unvoiced stop

			stressed_syllable = vowel_count - 3;
			if(vowel_count < 16)
			{
				if(phoneme_tab[final_ph]->type == phVOWEL)
					stressed_syllable = guess_ru_v[vowel_count];
				else
				if(phoneme_tab[final_ph]->type == phSTOP)
					stressed_syllable = guess_ru_t[vowel_count];
				else
					stressed_syllable = guess_ru[vowel_count];
			}
			vowel_stress[stressed_syllable] = 4;
			max_stress = 4;
		}
		break;

	case 6:    // LANG=hi stress on the last heaviest syllable
		if(stressed_syllable == 0)
		{
			int wt;
			int max_weight = -1;
			int prev_stressed;

			// find the heaviest syllable, excluding the final syllable
			for(ix = 1; ix < (vowel_count-1); ix++)
			{
				if(vowel_stress[ix] == 0)
				{
					if((wt = syllable_weight[ix]) >= max_weight)
					{
						max_weight = wt;
						prev_stressed = stressed_syllable;
						stressed_syllable = ix;
					}
				}
			}

			if((syllable_weight[vowel_count-1] == 2) &&  (max_weight< 2))
			{
				// the only double=heavy syllable is the final syllable, so stress this
				stressed_syllable = vowel_count-1;
			}
			else
			if(max_weight <= 0)
			{
				// all syllables, exclusing the last, are light. Stress the first syllable
				stressed_syllable = 1;
			}

			vowel_stress[stressed_syllable] = 4;
			max_stress = 4;
		}
		break;

	case 7:  // LANG=tr, the last syllable for any vowel markes explicitly as unstressed
		if(stressed_syllable == 0)
		{
			stressed_syllable = vowel_count - 1;
			for(ix=1; ix < vowel_count; ix++)
			{
				if(vowel_stress[ix] == 1)
				{
					stressed_syllable = ix-1;
					break;
				}
			}
			vowel_stress[stressed_syllable] = 4;
			max_stress = 4;
		}
		break;

	case 9:  // mark all as stressed
		for(ix=1; ix<vowel_count; ix++)
		{
			if(vowel_stress[ix] == 0)
				vowel_stress[ix] = 4;
		}
		break;
	}

	/* now guess the complete stress pattern */
	if(max_stress < 4)
		stress = 4;  /* no primary stress marked, use for 1st syllable */
	else
		stress = 3;


	if((langopts.stress_flags & 0x1000) && (vowel_count == 2))
	{
		// Two syllable word, if one syllable has primary stress, then give the other secondary stress
		if(vowel_stress[1] == 4)
			vowel_stress[2] = 3;
		if(vowel_stress[2] == 4)
			vowel_stress[1] = 3;
	}
#if deleted
	if((langopts.stress_flags & 0x2000) && (vowel_stress[1] == 0))
	{
		// If there is only one syllable before the primary stress, give it a secondary stress
		if((vowel_count > 2) && (vowel_stress[2] >= 4))
		{
			vowel_stress[1] = 3;
		}
	}
#endif

	done = 0;
	for(v=1; v<vowel_count; v++)
	{
		if(vowel_stress[v] == 0)
		{
			if((langopts.stress_flags & 0x10) && (stress < 4) && (v == vowel_count-1))
			{
				// flag: don't give secondary stress to final vowel
			}
			else
			if((langopts.stress_flags & 0x8000) && (done == 0))
			{
				vowel_stress[v] = (char)stress;
				done =1;
				stress = 3;  /* use secondary stress for remaining syllables */
			}
			else
			if((vowel_stress[v-1] <= 1) && (vowel_stress[v+1] <= 1))
			{
				/* trochaic: give stress to vowel surrounded by unstressed vowels */

				if((stress == 3) && (langopts.stress_flags & 0x20))
					continue;      // don't use secondary stress

				if((v > 1) && (langopts.stress_flags & 0x40) && (syllable_weight[v]==0) && (syllable_weight[v+1]>0))
				{
					// don't put secondary stress on a light syllable which is followed by a heavy syllable
					continue;
				}

// should start with secondary stress on the first syllable, or should it count back from
// the primary stress and put secondary stress on alternate syllables?
				vowel_stress[v] = (char)stress;
				done =1;
				stress = 3;  /* use secondary stress for remaining syllables */
			}
		}
	}

	if((unstressed_word) && (tonic < 0))
	{
		if(vowel_count <= 2)
			tonic = langopts.unstressed_wd1;   /* monosyllable - unstressed */
		else
			tonic = langopts.unstressed_wd2;   /* more than one syllable, used secondary stress as the main stress */
	}

	max_stress = 0;
	max_stress_posn = 0;
	for(v=1; v<vowel_count; v++)
	{
		if(vowel_stress[v] >= max_stress)
		{
			max_stress = vowel_stress[v];
			max_stress_posn = v;
		}
	}

	if(tonic >= 0)
	{
		/* find position of highest stress, and replace it by 'tonic' */

		/* don't disturb an explicitly set stress by 'unstress-at-end' flag */
		if((tonic > max_stress) || (max_stress <= 4))
			vowel_stress[max_stress_posn] = (char)tonic;
		max_stress = tonic;
	}


	/* produce output phoneme string */
	p = phonetic;
	v = 1;

	if((ph = phoneme_tab[*p]) != NULL)
	{

		if(ph->type == phSTRESS)
			ph = phoneme_tab[p[1]];

#ifdef deleted
		int gap = langopts.word_gap & 0x700;
		if((gap) && (vowel_stress[1] >= 4) && (prev_stress >= 4))
		{
			/* two primary stresses together, insert a short pause */
			*output++ = pause_phonemes[gap >> 8];
		}
		else
#endif
		if((langopts.vowel_pause & 0x30) && (ph->type == phVOWEL))
		{
			// word starts with a vowel

			if((langopts.vowel_pause & 0x20) && (vowel_stress[1] >= 4))
			{
					*output++ = phonPAUSE_NOLINK;   // not to be replaced by link
			}
			else
			{
				*output++ = phonPAUSE_VSHORT;     // break, but no pause
			}
		}
	}

	p = phonetic;
	post_tonic = 0;
	while(((phcode = *p++) != 0) && (output < max_output))
	{
		if((ph = phoneme_tab[phcode]) == NULL)
			continue;

//		if(ph->type == phSTRESS)
//			continue;

		if(ph->type == phPAUSE)
		{
			prev_last_stress = 0;
		}
		else
		if(((ph->type == phVOWEL) && !(ph->phflags & phNONSYLLABIC)) || (*p == phonSYLLABIC))
		{
			// a vowel, or a consonant followed by a syllabic consonant marker

			v_stress = vowel_stress[v];
			prev_last_stress = v_stress;

			if(vowel_stress[v-1] >= max_stress)
				post_tonic = 1;

			if(v_stress <= 1)
			{
				if((v > 1) && (max_stress >= 4) && (langopts.stress_flags & 4) && (v == (vowel_count-1)))
				{
					// option: mark unstressed final syllable as diminished
					v_stress = 1;
				}
				else
				if((langopts.stress_flags & 2) || (v == 1) || (v == (vowel_count-1)))
				{
					// first or last syllable, or option 'don't set diminished stress'
					v_stress = 0;
				}
				else
				if((v == (vowel_count-2)) && (vowel_stress[vowel_count-1] <= 1))
				{
					// penultimate syllable, followed by an unstressed final syllable
					v_stress = 0;
				}
				else
				{
					// unstressed syllable within a word
					if((vowel_stress[v-1] != 1) || ((langopts.stress_flags & 0x10000) == 0))
					{
						v_stress = 1;      /* change from 0 (unstressed) to 1 (diminished stress) */
						vowel_stress[v] = v_stress;
					}
				}
			}

			if(v_stress > 0)
				*output++ = stress_phonemes[v_stress];  // mark stress of all vowels except 0 (unstressed)


			if(vowel_stress[v] > max_stress)
			{
				max_stress = vowel_stress[v];
			}

			if((*p == phonLENGTHEN) && ((opt_length = langopts.param[LOPT_IT_LENGTHEN]) != 0))
			{
				// remove lengthen indicator from non-stressed syllables
				int shorten=0;

				if(opt_length & 0x10)
				{
					// only allow lengthen indicator on the highest stress syllable in the word
					if(v != max_stress_posn)
						shorten = 1;
				}
				else
				if(v_stress < 4)
				{
					// only allow lengthen indicator if stress >= 4.
					shorten = 1;
				}

				if(((opt_length & 0xf)==2) && (v != (vowel_count - 2)))
					shorten = 1;    // LANG=Italian, remove lengthen indicator from non-penultimate syllables

				if(shorten)
					p++;
			}

			v++;
		}

		if(phcode != 1)
			*output++ = phcode;
	}
	*output++ = 0;

}  /* end of SetWordStress */




//=============================================================================================
//   Look up a word in the pronunciation rules
//
//=============================================================================================


#ifdef LOG_TRANSLATE
char *Translator::DecodeRule(const char *group, char *rule)
{//==================================================
/* Convert compiled match template to ascii */

   unsigned char rb;
	unsigned char c;
	char *p;
   int  ix;
	int  match_type;
	int  finished=0;
	int  value;
	int  linenum=0;
	int  flags;
	int  suffix_char;
	int  condition_num=0;
   char buf[60];
   char buf_pre[60];
	char suffix[20];
	static char output[60];

	static char symbols[] = {' ',' ',' ',' ',' ',' ',' ',' ',' ',
			'@','&','%','+','#','S','D','Z','A','L',' ',' ',' ',' ',' ','N','K','V',' ','T','X','?','W'};

	static char symbols_lg[] = {'A','B','C','H','F','G','Y'};

	match_type = 0;
   buf_pre[0] = 0;
	strcpy(buf,group);
	p = &buf[strlen(buf)];
   while(!finished)
   {
		rb = *rule++;

		if(rb <= RULE_LINENUM)
		{
			switch(rb)
			{
			case 0:
			case RULE_PHONEMES:
				finished=1;
				break;
			case RULE_PRE:
				match_type = RULE_PRE;
				*p = 0;
				p = buf_pre;
				break;
			case RULE_POST:
				match_type = RULE_POST;
				*p = 0;
				strcat(buf," (");
				p = &buf[strlen(buf)];
				break;
			case RULE_PH_COMMON:
				break;
			case RULE_CONDITION:
				/* conditional rule, next byte gives condition number */
				condition_num = *rule++;
				break;
			case RULE_LINENUM:
				value = (rule[1] & 0xff) - 1;
				linenum = (rule[0] & 0xff) - 1 + (value * 255);
				rule+=2;
				break;
			}
			continue;
		}
		
		if(rb == RULE_ENDING)
		{
			static const char *flag_chars = "ei vtfq t";
			flags = ((rule[0] & 0x7f)<< 8) + (rule[1] & 0x7f);
			suffix_char = 'S';
			if(flags & (SUFX_P >> 8))
				suffix_char = 'P';
			sprintf(suffix,"%c%d",suffix_char,rule[2] & 0x7f);
			rule += 3;
			for(ix=0;ix<9;ix++)
			{
				if(flags & 1)
					sprintf(&suffix[strlen(suffix)],"%c",flag_chars[ix]);
				flags = (flags >> 1);
			}
			strcpy(p,suffix);
			p += strlen(suffix);
			c = ' ';
		}
		else
		if(rb == RULE_LETTERGP)
		{
			c = symbols_lg[*rule++ - 'A'];
		}
		else
		if(rb == RULE_LETTERGP2)
		{
			value = *rule++ - 'A';
			p[0] = 'L';
			p[1] = (value / 10) + '0';
			c = (value % 10) + '0';

			if(match_type == RULE_PRE)
			{
				p[0] = c;
				c = 'L';
			}
			p+=2;
		}
		else
		if(rb <= RULE_LAST_RULE)
			c = symbols[rb];
		else
		if(rb == RULE_SPACE)
			c = '_';
		else
			c = rb;
		*p++ = c;
	}
	*p = 0;

	p = output;
	if(linenum > 0)
	{
		sprintf(p,"%5d:\t",linenum);
		p += 7;
	}
	if(condition_num > 0)
	{
		sprintf(p,"?%d ",condition_num);
		p = &p[strlen(p)];
	}
	if((ix = strlen(buf_pre)) > 0)
	{
		while(--ix >= 0)
			*p++ = buf_pre[ix];
		*p++ = ')';
		*p++ = ' ';
	}
	*p = 0;
	strcat(p,buf);
	ix = strlen(output);
	while(ix < 8)
		output[ix++]=' ';
	output[ix]=0;
   return(output);
}   /* end of decode_match */
#endif



void Translator::AppendPhonemes(char *string, int size, const char *ph)
{//====================================================================
/* Add new phoneme string "ph" to "string"
	Keeps count of the number of vowel phonemes in the word, and whether these
   can be stressed syllables.  These values can be used in translation rules
*/	
	const char *p;
	unsigned char  c;
	int  unstress_mark;
	int length;

	length = strlen(ph) + strlen(string);
	if(length >= size)
	{
		return;
	}

	/* any stressable vowel ? */
	unstress_mark = 0;
	p = ph;
	while((c = *p++) != 0)
	{
		if(c >= n_phoneme_tab) continue;

		if(phoneme_tab[c]->type == phSTRESS)
		{
			if(phoneme_tab[c]->std_length < 4)
				unstress_mark = 1;
		}
		else
		{
			if(phoneme_tab[c]->type == phVOWEL)
			{
				if(((phoneme_tab[c]->phflags & phUNSTRESSED) == 0) &&
					(unstress_mark == 0))
				{
					word_stressed_count++;
				}
				unstress_mark = 0;
				word_vowel_count++;
			}
		}
	}
	
	if(string != NULL)
		strcat(string,ph);
}   /* end of AppendPhonemes */



void Translator::MatchRule(char *word[], const char *group, char *rule, MatchRecord *match_out, int word_flags, int dict_flags)
{//============================================================================================================================
/* Checks a specified word against dictionary rules.
	Returns with phoneme code string, or NULL if no match found.

	word (indirect) points to current character group within the input word
			This is advanced by this procedure as characters are consumed

	group:  the initial characters used to choose the rules group

	rule:  address of dictionary rule data for this character group

	match_out:  returns best points score

	word_flags:  indicates whether this is a retranslation after a suffix has been removed
*/

	unsigned char rb;     // current instuction from rule
	unsigned char letter;   // current letter from input word, single byte
	int letter_w;         // current letter, wide character
	int letter_xbytes;    // number of extra bytes of multibyte character (num bytes - 1)
	unsigned char last_letter;

	char *pre_ptr;
	char *post_ptr;       /* pointer to first character after group */

	char *rule_start;       /* start of current match template */
	char *p;

	int  match_type;      /* left, right, or consume */
	int  failed;
	int  consumed;        /* number of letters consumed from input */
	int  count;           /* count through rules in the group */
	int  syllable_count;
	int  vowel;
	int  letter_group;
	int  distance_right;
	int  distance_left;
	int  lg_pts;
	int  n_bytes;

	MatchRecord match;
	static MatchRecord best;

	int  total_consumed;  /* letters consumed for best match */
	int  group_length;

	unsigned char condition_num;
	char *common_phonemes;  /* common to a group of entries */



	if(rule == NULL)
	{
		match_out->points = 0;
		(*word)++;
		return;
	}


	total_consumed = 0;
	count = 0;
	common_phonemes = NULL;
	match_type = 0;

	best.points = 0;
	best.phonemes = "";
	best.end_type = 0;
	best.del_fwd = NULL;

	group_length = strlen(group);
	
	/* search through dictionary rules */
	while(rule[0] != RULE_GROUP_END)
	{
		match_type=0;
		consumed = 0;
		letter = 0;
		distance_right= -6;   /* used to reduce points for matches further away the current letter */
		distance_left= -2;
		count++;

		match.points = 1;
		match.end_type = 0;
		match.del_fwd = NULL;
		
		pre_ptr = *word;
		post_ptr = *word + group_length;

		/* work through next rule until end, or until no-match proved */
		rule_start = rule;
		failed = 0;
		while(!failed)
		{
			rb = *rule++;

			if(rb <= RULE_LINENUM)
			{
				switch(rb)
				{
				case 0:  // no phoneme string for this rule, use previous common rule
					if(common_phonemes != NULL)
					{
						match.phonemes = common_phonemes;
						if(*match.phonemes == RULE_CONDITION)
							match.phonemes += 2;   // skip over condition number
						while(((rb = *match.phonemes++) != 0) && (rb != RULE_PHONEMES));
					}
					else
					{
						match.phonemes = "";
					}
					rule--;      // so we are still pointing at the 0
					failed=2;    // matched OK
					break;
				case RULE_PRE:
					match_type = RULE_PRE;
					break;
				case RULE_POST:
					match_type = RULE_POST;
					break;
				case RULE_PHONEMES:
					match.phonemes = rule;
					failed=2;     // matched OK
					break;
				case RULE_PH_COMMON:
					common_phonemes = rule;
					break;
				case RULE_CONDITION:
					/* conditional rule, next byte gives condition number */
					condition_num = *rule++;
					
					if(condition_num >= 32)
					{
						// allow the rule only if the condition number is NOT set
						if((dict_condition & (1L << (condition_num-32))) != 0)
							failed = 1;
					}
					else
					{
						// allow the rule only if the condition number is set
						if((dict_condition & (1L << condition_num)) == 0)
							failed = 1;
					}

					if(!failed)
						match.points++;  // add one point for a matched conditional rule
					break;
				case RULE_LINENUM:
					rule+=2;
					break;
				}
				continue;
			}

			switch(match_type)
			{
			case 0:
				/* match and consume this letter */
				last_letter = letter;
				letter = *post_ptr++;

				if((letter == rb) || ((letter==(unsigned char)REPLACED_E) && (rb=='e')))
				{
					match.points += 21;
					consumed++;
				}
				else
					failed = 1;
				break;


			case RULE_POST:
				/* continue moving fowards */
				distance_right += 6;
				if(distance_right > 18)
					distance_right = 19;
				last_letter = letter;
				letter_xbytes = utf8_in(&letter_w,post_ptr,0)-1;
				letter = *post_ptr++;

				switch(rb)
				{
				case RULE_LETTERGP:
					letter_group = *rule++ - 'A';
					if(IsLetter(letter_w,letter_group))
					{
						lg_pts = 20;
						if(letter_group==2)
							lg_pts = 19;  // fewer points for C, general consonant
						match.points += (lg_pts-distance_right);
						post_ptr += letter_xbytes;
					}
					else
						failed = 1;
					break;

				case RULE_LETTERGP2:   // match against a list of utf-8 strings
					letter_group = *rule++ - 'A';
					if((n_bytes = IsLetterGroup(post_ptr-1,letter_group,0)) >0)
					{
						match.points += (20-distance_right);
						post_ptr += (n_bytes-1);
					}
					else
						failed =1;
					break;

				case RULE_NOTVOWEL:
					if(!IsLetter(letter_w,0))
					{
						match.points += (20-distance_right);
						post_ptr += letter_xbytes;
					}
					else
						failed = 1;
					break;

				case RULE_DIGIT:
					if(IsDigit(letter_w))
					{
						match.points += (20-distance_right);
						post_ptr += letter_xbytes;
					}
					else
					if(langopts.tone_numbers)
					{
						// also match if there is no digit
						match.points += (20-distance_right);
						post_ptr--;
					}
					else
						failed = 1;
					break;
					
				case RULE_NONALPHA:
					if(!iswalpha(letter_w))
					{
						match.points += (21-distance_right);
						post_ptr += letter_xbytes;
					}
					else
						failed = 1;
					break;

				case RULE_DOUBLE:
					if(letter == last_letter)
						match.points += (21-distance_right);
					else
						failed = 1;
					break;

				case RULE_ALT1:
					if(dict_flags & FLAG_ALT_TRANS)
						match.points++;
					else
						failed = 1;
					break;

				case '-':
					if((letter == '-') || ((letter == ' ') && (word_flags & FLAG_HYPHEN_AFTER)))
					{
						match.points += (22-distance_right);    // one point more than match against space
					}
					else
						failed = 1;
					break;

				case RULE_SYLLABLE:
					{
						/* more than specified number of vowel letters to the right */
						char *p = post_ptr + letter_xbytes;

						syllable_count = 1;
						while(*rule == RULE_SYLLABLE)
						{
							rule++;
							syllable_count+=1;   /* number of syllables to match */
						}
						vowel = 0;
						while(letter_w != RULE_SPACE)
						{
							if((vowel==0) && IsLetter(letter_w,LETTERGP_VOWEL2))
							{
								// this is counting vowels which are separated by non-vowels
								syllable_count--;
							}
							vowel = IsLetter(letter_w,LETTERGP_VOWEL2);
							p += utf8_in(&letter_w,p,0);
						}
						if(syllable_count <= 0)
							match.points+= (19-distance_right);
						else
							failed = 1;
					}
					break;

				case RULE_NOVOWELS:
					{
						char *p = post_ptr + letter_xbytes;
						while(letter_w != RULE_SPACE)
						{
							if(IsLetter(letter_w,LETTERGP_VOWEL2))
							{
								failed = 1;
								break;
							}
							p += utf8_in(&letter_w,p,0);
						}
						if(!failed)
							match.points += (19-distance_right);
					}
					break;

				case RULE_INC_SCORE:
					match.points += 20;      // force an increase in points
					break;

				case RULE_DEL_FWD:
					// find the next 'e' in the word and replace by ''
					for(p = *word + group_length; *p != ' '; p++)
					{
						if(*p == 'e')
						{
							match.del_fwd = p;
							break;
						}
					}
					break;

				case RULE_ENDING:
					// next 3 bytes are a (non-zero) ending type. 2 bytes of flags + suffix length
					match.end_type = (rule[0] << 16) + ((rule[1] & 0x7f) << 8) + (rule[2] & 0x7f);
					rule += 3;
					break;

				case RULE_NO_SUFFIX:
					if(word_flags & FLAG_SUFFIX_REMOVED)
						failed = 1;             // a suffix has been removed
					else
						match.points++;
					break;

				default:
					if(letter == rb)
					{
						if(letter == RULE_SPACE)
							match.points += (21-distance_right);
						else
							match.points += (21-distance_right);
					}
					else
						failed = 1;
					break;
				}
				break;


			case RULE_PRE:
				/*…