postgresql/contrib/tsearch2/ispell/spell.c

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

#include "postgres.h"

#include "spell.h"

#define MAX_NORM 1024
#define MAXNORMLEN 256

#define STRNCASECMP(x,y)		(strncasecmp(x,y,strlen(y)))
#define GETWCHAR(W,L,N,T) ( ((uint8*)(W))[ ((T)=='p') ? (N) : ( (L) - 1 - (N) ) ] )
#define GETCHAR(A,N,T)	  GETWCHAR( (A)->repl, (A)->replen, N, T )


#define MEMOUT(X)  if ( !(X) ) ereport(ERROR, (errcode(ERRCODE_OUT_OF_MEMORY), errmsg("out of memory")))

static int
cmpspell(const void *s1, const void *s2)
{
	return (strcmp(((const SPELL *) s1)->word, ((const SPELL *) s2)->word));
}
static int
cmpspellaffix(const void *s1, const void *s2)
{
	return (strcmp(((const SPELL *) s1)->p.flag, ((const SPELL *) s2)->p.flag));
}

static void
strlower(char *str)
{
	unsigned char *ptr = (unsigned char *) str;

	while (*ptr)
	{
		*ptr = tolower(*ptr);
		ptr++;
	}
}

static char* 
strnduplicate(char *s, int len) {
	char *d=(char*)palloc( len + 1 );
	memcpy(d, s, len );
	d[len]='\0';
	return d;
}
/* backward string compaire for suffix tree operations */
static int
strbcmp(const unsigned char *s1, const unsigned char *s2)
{
	int			l1 = strlen(s1) - 1,
				l2 = strlen(s2) - 1;

	while (l1 >= 0 && l2 >= 0)
	{
		if (s1[l1] < s2[l2])
			return -1;
		if (s1[l1] > s2[l2])
			return 1;
		l1--;
		l2--;
	}
	if (l1 < l2)
		return -1;
	if (l1 > l2)
		return 1;

	return 0;
}
static int
strbncmp(const unsigned char *s1, const unsigned char *s2, size_t count)
{
	int			l1 = strlen(s1) - 1,
				l2 = strlen(s2) - 1,
				l = count;

	while (l1 >= 0 && l2 >= 0 && l > 0)
	{
		if (s1[l1] < s2[l2])
			return -1;
		if (s1[l1] > s2[l2])
			return 1;
		l1--;
		l2--;
		l--;
	}
	if (l == 0)
		return 0;
	if (l1 < l2)
		return -1;
	if (l1 > l2)
		return 1;
	return 0;
}

static int
cmpaffix(const void *s1, const void *s2)
{
	if (((const AFFIX *) s1)->type < ((const AFFIX *) s2)->type)
		return -1;
	if (((const AFFIX *) s1)->type > ((const AFFIX *) s2)->type)
		return 1;
	if (((const AFFIX *) s1)->type == 'p')
		return (strcmp(((const AFFIX *) s1)->repl, ((const AFFIX *) s2)->repl));
	else
		return (strbcmp(((const AFFIX *) s1)->repl, ((const AFFIX *) s2)->repl));
}

int
NIAddSpell(IspellDict * Conf, const char *word, const char *flag)
{
	if (Conf->nspell >= Conf->mspell)
	{
		if (Conf->mspell)
		{
			Conf->mspell += 1024 * 20;
			Conf->Spell = (SPELL *) realloc(Conf->Spell, Conf->mspell * sizeof(SPELL));
		}
		else
		{
			Conf->mspell = 1024 * 20;
			Conf->Spell = (SPELL *) malloc(Conf->mspell * sizeof(SPELL));
		}
		MEMOUT(Conf->Spell);
	}
	Conf->Spell[Conf->nspell].word = strdup(word);
	MEMOUT(Conf->Spell[Conf->nspell].word);
	strncpy(Conf->Spell[Conf->nspell].p.flag, flag, 16);
	Conf->nspell++;
	return (0);
}


int
NIImportDictionary(IspellDict * Conf, const char *filename)
{
	unsigned char str[BUFSIZ];
	FILE	   *dict;

	if (!(dict = fopen(filename, "r")))
		return (1);
	while (fgets(str, sizeof(str), dict))
	{
		unsigned char *s;
		const unsigned char *flag;

		flag = NULL;
		if ((s = strchr(str, '/')))
		{
			*s = 0;
			s++;
			flag = s;
			while (*s)
			{
				if (isprint(*s) && !isspace(*s))
					s++;
				else
				{
					*s = 0;
					break;
				}
			}
		}
		else
			flag = "";
		strlower(str);
		/* Dont load words if first letter is not required */
		/* It allows to optimize loading at  search time   */
		s = str;
		while (*s)
		{
			if (*s == '\r')
				*s = 0;
			if (*s == '\n')
				*s = 0;
			s++;
		}
		NIAddSpell(Conf, str, flag);
	}
	fclose(dict);
	return (0);
}


static int
FindWord(IspellDict * Conf, const char *word, int affixflag, char compoundonly)
{
	SPNode *node = Conf->Dictionary;
	SPNodeData *StopLow, *StopHigh, *StopMiddle;
	int level=0, wrdlen=strlen(word);

	while( node && level<wrdlen) {
		StopLow = node->data;
		StopHigh = node->data+node->length;
		while (StopLow < StopHigh) {
			StopMiddle = StopLow + (StopHigh - StopLow) / 2;
			if ( StopMiddle->val == ((uint8*)(word))[level] ) {
				if ( wrdlen==level+1 && StopMiddle->isword ) {
					if ( compoundonly && !StopMiddle->compoundallow )
						return 0;
					if ( (affixflag == 0) || (strchr(Conf->AffixData[StopMiddle->affix], affixflag) != NULL))
						return 1;
				}
				node=StopMiddle->node;
				level++;
				break;
			} else if ( StopMiddle->val < ((uint8*)(word))[level] ) {
				StopLow = StopMiddle + 1;
			} else {
				StopHigh = StopMiddle;
			}
		}
		if ( StopLow >= StopHigh )
			break; 
	}
	return 0;
}

int
NIAddAffix(IspellDict * Conf, int flag, char flagflags, const char *mask, const char *find, const char *repl, int type)
{
	if (Conf->naffixes >= Conf->maffixes)
	{
		if (Conf->maffixes)
		{
			Conf->maffixes += 16;
			Conf->Affix = (AFFIX *) realloc((void *) Conf->Affix, Conf->maffixes * sizeof(AFFIX));
		}
		else
		{
			Conf->maffixes = 16;
			Conf->Affix = (AFFIX *) malloc(Conf->maffixes * sizeof(AFFIX));
		}
		MEMOUT(Conf->Affix);
	}
	if (type == 's')
		sprintf(Conf->Affix[Conf->naffixes].mask, "%s$", mask);
	else
		sprintf(Conf->Affix[Conf->naffixes].mask, "^%s", mask);
	Conf->Affix[Conf->naffixes].compile = 1;
	Conf->Affix[Conf->naffixes].flagflags = flagflags;
	Conf->Affix[Conf->naffixes].flag = flag;
	Conf->Affix[Conf->naffixes].type = type;

	strcpy(Conf->Affix[Conf->naffixes].find, find);
	strcpy(Conf->Affix[Conf->naffixes].repl, repl);
	Conf->Affix[Conf->naffixes].replen = strlen(repl);
	Conf->naffixes++;
	return (0);
}

static char *
remove_spaces(char *dist, char *src)
{
	char	   *d,
			   *s;

	d = dist;
	s = src;
	while (*s)
	{
		if (*s != ' ' && *s != '-' && *s != '\t')
		{
			*d = *s;
			d++;
		}
		s++;
	}
	*d = 0;
	return (dist);
}


int
NIImportAffixes(IspellDict * Conf, const char *filename)
{
	unsigned char str[BUFSIZ];
	unsigned char flag = 0;
	unsigned char mask[BUFSIZ] = "";
	unsigned char find[BUFSIZ] = "";
	unsigned char repl[BUFSIZ] = "";
	unsigned char *s;
	int			i;
	int			suffixes = 0;
	int			prefixes = 0;
	unsigned char flagflags = 0;
	FILE	   *affix;

	if (!(affix = fopen(filename, "r")))
		return (1);
	Conf->compoundcontrol='\t';

	while (fgets(str, sizeof(str), affix))
	{
		if (STRNCASECMP(str, "compoundwords")==0) {
			s=strchr(str, 'l');
			if ( s ) {
				while( *s!=' ' ) s++;
				while( *s==' ' ) s++;
				Conf->compoundcontrol = *s;
				continue; 
			}
		}
		if (!STRNCASECMP(str, "suffixes"))
		{
			suffixes = 1;
			prefixes = 0;
			continue;
		}
		if (!STRNCASECMP(str, "prefixes"))
		{
			suffixes = 0;
			prefixes = 1;
			continue;
		}
		if (!STRNCASECMP(str, "flag "))
		{
			s = str + 5;
			flagflags=0;
			while( *s==' ' ) s++;
			if ( *s=='*' ) {
				flagflags|=FF_CROSSPRODUCT;
				s++;
			} else if ( *s=='~' ) {
				flagflags|=FF_COMPOUNDONLYAFX;
				s++;
			}

			if ( *s=='\\' ) s++;
		
			flag = *s;
			continue;
		}
		if ((!suffixes) && (!prefixes))
			continue;
		if ((s = strchr(str, '#')))
			*s = 0;
		if (!*str)
			continue;
		strlower(str);
		strcpy(mask, "");
		strcpy(find, "");
		strcpy(repl, "");
		i = sscanf(str, "%[^>\n]>%[^,\n],%[^\n]", mask, find, repl);
		remove_spaces(str, repl);
		strcpy(repl, str);
		remove_spaces(str, find);
		strcpy(find, str);
		remove_spaces(str, mask);
		strcpy(mask, str);
		switch (i)
		{
			case 3:
				break;
			case 2:
				if (*find != '\0')
				{
					strcpy(repl, find);
					strcpy(find, "");
				}
				break;
			default:
				continue;
		}

		NIAddAffix(Conf, (int) flag, (char) flagflags, mask, find, repl, suffixes ? 's' : 'p');

	}
	fclose(affix);

	return (0);
}

static int 
MergeAffix(IspellDict *Conf, int a1, int a2) {
	int naffix=0;
	char **ptr=Conf->AffixData;

	while(*ptr) {
		naffix++;
		ptr++;
	}
	
	Conf->AffixData=(char**)realloc( Conf->AffixData, (naffix+2)*sizeof(char*) );
	MEMOUT(Conf->AffixData);
	ptr = Conf->AffixData + naffix;
	*ptr=malloc( strlen(Conf->AffixData[a1]) + strlen(Conf->AffixData[a2]) + 1 /* space */ + 1 /* \0 */ );
	MEMOUT(ptr);
	sprintf(*ptr, "%s %s", Conf->AffixData[a1], Conf->AffixData[a2]);
	ptr++;
	*ptr='\0';
	return naffix; 
}


static SPNode* 
mkSPNode(IspellDict *Conf, int low, int high, int level) {
	int i;
	int nchar=0;
	char lastchar='\0';
	SPNode *rs;
	SPNodeData *data;
	int lownew=low;

	for(i=low; i<high; i++)
		if ( Conf->Spell[i].p.d.len>level && lastchar!=Conf->Spell[i].word[level] ) {
			nchar++;
			lastchar=Conf->Spell[i].word[level];
		}

	if (!nchar)
		return NULL;

	rs=(SPNode*)malloc(SPNHRDSZ+nchar*sizeof(SPNodeData));
	MEMOUT(rs);
	memset(rs,0,SPNHRDSZ+nchar*sizeof(SPNodeData));
	rs->length = nchar;
	data=rs->data;

	lastchar='\0';
	for(i=low; i<high; i++)
		if ( Conf->Spell[i].p.d.len>level ) {
			if ( lastchar!=Conf->Spell[i].word[level] ) {
				if ( lastchar ) {
					data->node = mkSPNode(Conf, lownew, i, level+1);
					lownew=i;
					data++;
				}
				lastchar=Conf->Spell[i].word[level];
			}
			data->val=((uint8*)(Conf->Spell[i].word))[level];
			if ( Conf->Spell[i].p.d.len == level+1 ) {
				if ( data->isword && data->affix!=Conf->Spell[i].p.d.affix) {
					/* 
					fprintf(stderr,"Word already exists: %s (affixes: '%s' and '%s')\n", 
						Conf->Spell[i].word, 
						Conf->AffixData[data->affix],
						Conf->AffixData[Conf->Spell[i].p.d.affix]
					); 
					*/
					/* MergeAffix called a few times */
					data->affix = MergeAffix(Conf, data->affix, Conf->Spell[i].p.d.affix);
				} else
					data->affix = Conf->Spell[i].p.d.affix;
				data->isword=1;
				if ( strchr( Conf->AffixData[ data->affix ], Conf->compoundcontrol ) )
					data->compoundallow=1;
			}
		}
		
	data->node = mkSPNode(Conf, lownew, high, level+1);

	return rs;
}



void
NISortDictionary(IspellDict * Conf)
{
	size_t		i;
	int	naffix=3;
	
	/* compress affixes */
	qsort((void *) Conf->Spell, Conf->nspell, sizeof(SPELL), cmpspellaffix);
	for (i = 1; i < Conf->nspell; i++)
		if ( strcmp(Conf->Spell[i].p.flag,Conf->Spell[i-1].p.flag) )
			naffix++;

	Conf->AffixData=(char**)malloc( naffix*sizeof(char*) );
	MEMOUT(Conf->AffixData);
	memset(Conf->AffixData, 0, naffix*sizeof(char*));
	naffix=1;
	Conf->AffixData[0]=strdup("");
	MEMOUT(Conf->AffixData[0]);
	Conf->AffixData[1]=strdup( Conf->Spell[0].p.flag );
	MEMOUT(Conf->AffixData[1]);
	Conf->Spell[0].p.d.affix = 1;
	Conf->Spell[0].p.d.len = strlen(Conf->Spell[0].word);
	for (i = 1; i < Conf->nspell; i++) {
		if ( strcmp(Conf->Spell[i].p.flag, Conf->AffixData[naffix]) ) {
			naffix++;
			Conf->AffixData[naffix] = strdup( Conf->Spell[i].p.flag );
			MEMOUT(Conf->AffixData[naffix]);
		}
		Conf->Spell[i].p.d.affix = naffix;
		Conf->Spell[i].p.d.len = strlen(Conf->Spell[i].word);
	}
	
	qsort((void *) Conf->Spell, Conf->nspell, sizeof(SPELL), cmpspell);
	Conf->Dictionary = mkSPNode(Conf, 0, Conf->nspell, 0);
	
	for (i = 0; i < Conf->nspell; i++) 
		free( Conf->Spell[i].word );
	free( Conf->Spell );
	Conf->Spell=NULL;
}

static AffixNode*
mkANode(IspellDict *Conf, int low, int high, int level, int type) {
	int i;
	int nchar=0;
	uint8 lastchar='\0';
	AffixNode *rs;
	AffixNodeData *data;
	int lownew=low;

	for(i=low; i<high; i++)
		if ( Conf->Affix[i].replen>level && lastchar!=GETCHAR( Conf->Affix + i, level, type ) ) {
			nchar++;
			lastchar=GETCHAR( Conf->Affix + i, level, type );
		}

	if (!nchar)
		return NULL;

	rs=(AffixNode*)malloc(ANHRDSZ+nchar*sizeof(AffixNodeData));
	MEMOUT(rs);
	memset(rs,0,ANHRDSZ+nchar*sizeof(AffixNodeData));
	rs->length = nchar;
	data=rs->data;

	lastchar='\0';
	for(i=low; i<high; i++)
		if ( Conf->Affix[i].replen>level ) {
			if ( lastchar!=GETCHAR( Conf->Affix + i, level, type ) ) {
				if ( lastchar ) {
					data->node = mkANode(Conf, lownew, i, level+1, type);
					lownew=i;
					data++;
				}
				lastchar=GETCHAR( Conf->Affix + i, level, type );
			}
			data->val=GETCHAR( Conf->Affix + i, level, type );
			if ( Conf->Affix[i].replen == level+1 ) { /* affix stopped */
				if ( !data->naff ) {
					data->aff=(AFFIX**)malloc(sizeof(AFFIX*)*(high-i+1));
					MEMOUT(data->aff);
				}
				data->aff[ data->naff ] = Conf->Affix + i;
				data->naff++;
			}
		}
		
	data->node = mkANode(Conf, lownew, high, level+1, type);

	return rs;
}

void
NISortAffixes(IspellDict * Conf)
{
	AFFIX	   *Affix;
	size_t		i;
	CMPDAffix* ptr;
	int	firstsuffix=-1;

	if (Conf->naffixes > 1)
		qsort((void *) Conf->Affix, Conf->naffixes, sizeof(AFFIX), cmpaffix);

	Conf->CompoundAffix = ptr = (CMPDAffix*)malloc( sizeof(CMPDAffix) * Conf->naffixes );
	MEMOUT(Conf->CompoundAffix);
	ptr->affix=NULL;

	for (i = 0; i < Conf->naffixes; i++) {
		Affix = &(((AFFIX *) Conf->Affix)[i]);
		if ( Affix->type == 's' ) {
			if ( firstsuffix<0 ) firstsuffix=i;
			if ( Affix->flagflags & FF_COMPOUNDONLYAFX ) {
				if ( !ptr->affix || strbncmp((ptr-1)->affix, Affix->repl, (ptr-1)->len) ) {
					/* leave only unique and minimals suffixes */
					ptr->affix=Affix->repl;
					ptr->len=Affix->replen;
					ptr++;
				}
			}
		}
	}
	ptr->affix = NULL;
	Conf->CompoundAffix = (CMPDAffix*)realloc( Conf->CompoundAffix, sizeof(CMPDAffix) * (ptr-Conf->CompoundAffix+1) );

	Conf->Prefix = mkANode(Conf, 0, firstsuffix, 0, 'p'); 
	Conf->Suffix = mkANode(Conf, firstsuffix, Conf->naffixes, 0, 's');
}

static AffixNodeData*
FinfAffixes(AffixNode *node, const char *word, int wrdlen, int *level, int type) {
	AffixNodeData *StopLow, *StopHigh, *StopMiddle;
	uint8 symbol;

	while( node && *level<wrdlen) {
		StopLow = node->data;
		StopHigh = node->data+node->length;
		while (StopLow < StopHigh) {
			StopMiddle = StopLow + (StopHigh - StopLow) / 2;
			symbol = GETWCHAR(word,wrdlen,*level,type);
			if ( StopMiddle->val == symbol ) {
				if ( StopMiddle->naff ) 
					return StopMiddle;
				node=StopMiddle->node;
				(*level)++;
				break;
			} else if ( StopMiddle->val < symbol ) {
				StopLow = StopMiddle + 1;
			} else {
				StopHigh = StopMiddle;
			}
		}
		if ( StopLow >= StopHigh )
			break; 
	}
	return NULL;
}

static char *
CheckAffix(const char *word, size_t len, AFFIX * Affix, char flagflags, char *newword) {
	regmatch_t	subs[2];		/* workaround for apache&linux */
	int			err;

	if ( flagflags & FF_COMPOUNDONLYAFX ) {
		if ( (Affix->flagflags & FF_COMPOUNDONLYAFX) == 0 )
			return NULL;
	} else {
		if ( Affix->flagflags & FF_COMPOUNDONLYAFX )
			return NULL;
	} 

	if ( Affix->type=='s' ) {
		strcpy(newword, word);
		strcpy(newword + len - Affix->replen, Affix->find);
	} else {
		strcpy(newword, Affix->find);
		strcat(newword, word + Affix->replen);
	}

	if (Affix->compile)
	{
		err = regcomp(&(Affix->reg), Affix->mask, REG_EXTENDED | REG_ICASE | REG_NOSUB);
		if (err)
		{
			/* regerror(err, &(Affix->reg), regerrstr, ERRSTRSIZE); */
			regfree(&(Affix->reg));
			return (NULL);
		}
		Affix->compile = 0;
	}
	if (!(err = regexec(&(Affix->reg), newword, 1, subs, 0))) 
			return newword;
	return NULL;
}


static char	  **
NormalizeSubWord(IspellDict * Conf, char *word, char flag) {
	AffixNodeData	*suffix=NULL, *prefix=NULL;
	int 	slevel=0, plevel=0;
	int wrdlen = strlen(word), swrdlen;
	char	  **forms;
	char	  **cur;
	char		newword[2 * MAXNORMLEN] = "";
	char		pnewword[2 * MAXNORMLEN] = "";
	AffixNode *snode = Conf->Suffix, *pnode;
	int i,j;

	if (wrdlen > MAXNORMLEN) return NULL;
	strlower(word);	
	cur = forms = (char **) palloc(MAX_NORM * sizeof(char *));
	*cur = NULL;


	/* Check that the word itself is normal form */
	if (FindWord(Conf, word, 0, flag & FF_COMPOUNDWORD)) {
		*cur = pstrdup(word);
		cur++;
		*cur = NULL;
	}

	/* Find all other NORMAL forms of the 'word' (check only prefix)*/
	pnode=Conf->Prefix;
	plevel=0;
	while(pnode) {
		prefix=FinfAffixes(pnode, word, wrdlen, &plevel,'p');
		if (!prefix) break;
		for(j=0;j<prefix->naff;j++) {	
			if ( CheckAffix(word,wrdlen,prefix->aff[j], flag, newword) ) {
				/* prefix success */
				if ( FindWord(Conf, newword, prefix->aff[j]->flag, flag&FF_COMPOUNDWORD) && (cur - forms) < (MAX_NORM-1) ) {
					/* word search success */
					*cur = pstrdup(newword);
					cur++;
					*cur=NULL;
				}
			}
		}
		pnode = prefix->node;
		plevel++;
	}
 
	/* Find all other NORMAL forms of the 'word' (check suffix and then prefix)*/
	while( snode ) {
		/* find possible suffix */
		suffix = FinfAffixes(snode, word, wrdlen, &slevel, 's');
		if (!suffix) break;
		/* foreach suffix check affix */
		for(i=0;i<suffix->naff;i++) {
			if ( CheckAffix(word, wrdlen, suffix->aff[i], flag, newword) ) {
				/* suffix success */
				if ( FindWord(Conf, newword, suffix->aff[i]->flag, flag&FF_COMPOUNDWORD) && (cur - forms) < (MAX_NORM-1) ) {
					/* word search success */
					*cur = pstrdup(newword);
					cur++;
					*cur=NULL;
				}
				/* now we will look changed word with prefixes */
				pnode=Conf->Prefix;
				plevel=0;
				swrdlen=strlen(newword);
				while(pnode) {
					prefix=FinfAffixes(pnode, newword, swrdlen, &plevel,'p');
					if (!prefix) break;
					for(j=0;j<prefix->naff;j++) {	
						if ( CheckAffix(newword,swrdlen,prefix->aff[j], flag, pnewword) ) {
							/* prefix success */
							int ff=( prefix->aff[j]->flagflags & suffix->aff[i]->flagflags & FF_CROSSPRODUCT ) ?
								 0 : prefix->aff[j]->flag; 
							if ( FindWord(Conf, pnewword, ff, flag&FF_COMPOUNDWORD) && (cur - forms) < (MAX_NORM-1) ) {
								/* word search success */
								*cur = pstrdup(pnewword);
								cur++;
								*cur=NULL;
							}
						}
					}
					pnode = prefix->node;
					plevel++;
				} 
			}
		}

		snode=suffix->node;
		slevel++;
	}

	if (cur == forms) {
		pfree(forms);
		return (NULL);
	}
	return (forms);
}

typedef struct SplitVar {
	int	nstem;
	char	**stem;	
	struct	SplitVar *next;
} SplitVar;

static int 
CheckCompoundAffixes(CMPDAffix **ptr, char *word, int len) {
	while( (*ptr)->affix ) {
		if ( len > (*ptr)->len && strncmp((*ptr)->affix, word, (*ptr)->len)==0 ) {
			len = (*ptr)->len;
			(*ptr)++;
			return len;
		}
		(*ptr)++;
	}
	return 0;
}

static SplitVar*
CopyVar(SplitVar *s, int makedup) {
	SplitVar *v = (SplitVar*)palloc(sizeof(SplitVar));

	v->stem=(char**)palloc( sizeof(char*) * (MAX_NORM) );
	v->next=NULL;
	if ( s ) {
		int i;
		v->nstem = s->nstem;
		for(i=0;i<s->nstem;i++)
			v->stem[i] = (makedup) ? pstrdup( s->stem[i] ) : s->stem[i];
	} else {
		v->nstem=0;
	}
	return v;
}


static SplitVar*
SplitToVariants( IspellDict * Conf, SPNode *snode, SplitVar * orig, char *word, int wordlen, int startpos, int minpos ) {
	SplitVar *var=NULL;
	SPNodeData *StopLow, *StopHigh, *StopMiddle;
	SPNode *node = (snode) ? snode : Conf->Dictionary;
	int level=(snode) ? minpos : startpos; /* recursive minpos==level*/
	int lenaff;
	CMPDAffix *caff;
	char	notprobed[wordlen];

	memset(notprobed,1,wordlen);
	var = CopyVar(orig,1);

	while( node && level<wordlen) {
		StopLow = node->data;
		StopHigh = node->data+node->length;
		while (StopLow < StopHigh) {
			StopMiddle = StopLow + (StopHigh - StopLow) / 2;
			if ( StopMiddle->val == ((uint8*)(word))[level] ) {
				break;
			} else if ( StopMiddle->val < ((uint8*)(word))[level] ) {
				StopLow = StopMiddle + 1;
			} else {
				StopHigh = StopMiddle;
			}
		}
		if ( StopLow >= StopHigh )
			break;

		/* find word with epenthetic */
		caff = Conf->CompoundAffix;
		while ( level>startpos && (lenaff=CheckCompoundAffixes( &caff, word + level, wordlen - level ))>0 ) {
			/* there is one of compound suffixes, so check word for existings */
			char buf[MAXNORMLEN];
			char **subres;

			lenaff=level-startpos+lenaff;
		
			if ( !notprobed[startpos+lenaff-1] )
				continue;
				
			if ( level+lenaff-1 <= minpos )
				continue;

			memcpy(buf, word+startpos, lenaff);
			buf[lenaff]='\0';

			subres = NormalizeSubWord(Conf, buf, FF_COMPOUNDWORD | FF_COMPOUNDONLYAFX);
			if ( subres ) {
				/* Yes, it was a word from dictionary */
				SplitVar *new=CopyVar(var,0);
				SplitVar *ptr=var;
				char **sptr=subres;
			
				notprobed[startpos+lenaff-1]=0;
	
				while(*sptr) {
					new->stem[ new->nstem ] = *sptr;
					new->nstem++;
					sptr++;
				}
				pfree(subres);

				while( ptr->next ) 
					ptr = ptr->next;
				ptr->next = SplitToVariants(Conf, NULL, new, word, wordlen, startpos+lenaff, startpos+lenaff);
 
				pfree(new->stem);
				pfree(new);
			}
		}

		/* find infinitive */
		if ( StopMiddle->isword && StopMiddle->compoundallow && notprobed[level] ) {
			/* ok, we found full compoundallowed word*/
			if ( level>minpos ) {
				/* and its length more than minimal */
				if ( wordlen==level+1 ) {
					/* well, it was last word */
					var->stem[ var->nstem ] = strnduplicate(word + startpos, wordlen - startpos);
					var->nstem++;
					return var;
				} else {
					/* then we will search more big word at the same point */
					SplitVar *ptr=var;
					while( ptr->next ) 
						ptr = ptr->next;
					ptr->next=SplitToVariants(Conf, node, var, word, wordlen, startpos, level);
					/* we can find next word */
					level++;
					var->stem[ var->nstem ] = strnduplicate(word + startpos, level - startpos);
					var->nstem++;
					node = Conf->Dictionary;
					startpos=level;
					continue;
				}
			}
		}
		level++;
		node=StopMiddle->node;
	}

	var->stem[ var->nstem ] = strnduplicate(word + startpos, wordlen - startpos);
	var->nstem++;
	return var;
} 

char  **
NINormalizeWord(IspellDict * Conf, char *word) {
	char **res= NormalizeSubWord(Conf, word, 0);

	if ( Conf->compoundcontrol != '\t' ) {
		int wordlen=strlen(word);
		SplitVar *ptr, *var = SplitToVariants(Conf,NULL,NULL, word, wordlen, 0, -1);
		char **cur=res;
		int i;
	
		while(var) {
			if ( var->nstem > 1 ) {
				char **subres = NormalizeSubWord(Conf, var->stem[ var->nstem-1 ], FF_COMPOUNDWORD);
				if ( subres ) {
					char **ptr=subres;
	
					if ( cur ) {
						while(*cur) 
							cur++;
					} else {
						res=cur=(char **) palloc(MAX_NORM * sizeof(char *));
					}
	
					for(i=0;i<var->nstem-1;i++) {
						*cur=var->stem[ i ];
						cur++;
					}
					while(*ptr) {
						*cur=*ptr;
						cur++; ptr++;
					}
					*cur=NULL;
					pfree(subres);
					var->stem[ 0 ] = NULL;
				}
			}
	
			for(i=0;i<var->nstem && var->stem[ i ];i++)
				pfree( var->stem[i] );	
			ptr = var->next;
			pfree(var->stem);
			pfree(var);	
			var=ptr;
		}
	}
	return res;
}


static void freeSPNode(SPNode *node) {
	SPNodeData *data;

	if (!node) return;
	data=node->data;
	while( node->length ) {
		freeSPNode(data->node);
		data++;
		node->length--;
	}
	free(node);
}
	
static void freeANode(AffixNode *node) {
	AffixNodeData *data;

	if (!node) return;
	data=node->data;
	while( node->length ) {
		freeANode(data->node);
		if (data->naff)
			free(data->aff);	
		data++;
		node->length--;
	}
	free(node);
}
	

void
NIFree(IspellDict * Conf)
{
	int			i;
	AFFIX	   *Affix = (AFFIX *) Conf->Affix;
	char**     aff = Conf->AffixData;

	if ( aff ) {
		while(*aff) {
			free(*aff);
			aff++;
		}
		free(Conf->AffixData);
	}

	
	for (i = 0; i < Conf->naffixes; i++)
	{
		if (Affix[i].compile == 0)
			regfree(&(Affix[i].reg));
	}
	if (Conf->Spell) {
		for (i = 0; i < Conf->nspell; i++)
			free(Conf->Spell[i].word);
		free(Conf->Spell);
	}

	if (Conf->Affix) free(Conf->Affix);
	if ( Conf->CompoundAffix ) free(Conf->CompoundAffix);
	freeSPNode(Conf->Dictionary);
	freeANode(Conf->Suffix);
	freeANode(Conf->Prefix);
	memset((void *) Conf, 0, sizeof(IspellDict));
	return;
}