/* Strings_extensions.c
 *
 * Copyright (C) 1993-2004 David Weenink
 *
 * 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 2 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 to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 djmw 20011003
 djmw 20020813 GPL header
 djmw 20030107 Added Strings_setString
 djmw 20031212 Added Strings_extractPart
 djmw 20040301 Added Strings_createFixedLength.
 djmw 20040308 Corrected bug in strings_to_Strings.
 djmw 20040427 Strings_append added.
*/

#include "Strings_extensions.h"
#include "NUM2.h"

Strings Strings_createFixedLength (long numberOfStrings)
{
	Strings me = new (Strings);
	if (me == NULL || numberOfStrings <= 0) return NULL;
	my numberOfStrings = numberOfStrings;
	my strings = NUMpvector (1, numberOfStrings);
	if (my strings == NULL) forget (me);
	else my numberOfStrings = numberOfStrings;
	return me;
}

Strings Strings_append (Strings me, Strings thee)
{
	long i, k, numberOfStrings = my numberOfStrings + thy numberOfStrings;
	Strings him = Strings_createFixedLength (numberOfStrings);
	
	if (him == NULL) return NULL;
	for (i = 1; i <= my numberOfStrings; i++)
	{
		if (my strings[i] == NULL) continue;
		his strings [i] = Melder_strdup (my strings[i]);
		if (his strings[i] == NULL) goto end;
	}
	for (i = 1; i <= thy numberOfStrings; i++)
	{
		if (thy strings[i] == NULL) continue;
		k = my numberOfStrings + i;
		his strings [k] = Melder_strdup (thy strings[i]);
		if (his strings[k] == NULL) goto end;
	}
end:
	if (Melder_hasError ()) forget (him);
	return him;	
}

Strings Strings_change (Strings me, char *search, char *replace, 
	int maximumNumberOfReplaces, long *nmatches, long *nstringmatches, 
	int use_regexp)
{
	char **strings;
	Strings thee = new (Strings);
	if (thee == NULL) return NULL;
	
	strings = strs_replace (my strings, 1, my numberOfStrings, 
		search, replace, maximumNumberOfReplaces, nmatches, 
		nstringmatches, use_regexp);
		
	if (strings == NULL)
	{
		forget (thee);
		return NULL;
	}
	thy numberOfStrings = my numberOfStrings;
	thy strings = strings;
	return thee;
}

int Strings_setString (Strings me, char *new, long index)
{
	char *s;
	if (index < 1 || index > my numberOfStrings) return Melder_error 
		("Strings_setString: index must be in range [1, %d].", my numberOfStrings);

	s = Melder_strdup (new);
	if (my strings[index]) Melder_free (my strings[index]);
	my strings[index] = s;
	return 1;
}

Strings strings_to_Strings (char **strings, long from, long to)
{
	Strings thee;
	long i, k;
	
	thee = Strings_createFixedLength (to - from + 1);
	if (thee == NULL) goto end;
	
	for (i = from, k = 1; i <= to; i++, k++)
	{
		if (strings[i] && 
			((thy strings[k]  = Melder_strdup (strings[i])) == NULL)) goto end;
	}
end:
	if (Melder_hasError ()) forget (thee);
	return thee;
}

Strings Strings_extractPart (Strings me, long from, long to)
{
	if (from < 1 || to > my numberOfStrings || from > to) return Melder_errorp 
		("Strings_extractPart: begin and end must be in interval [1, %d].", my numberOfStrings);
	return strings_to_Strings (my strings, from, to);
}

Strings strings_to_Strings_link (char** strings, long n)
{
	long i;
	Strings me = Strings_createFixedLength (n);
	if (me == NULL) return NULL;
	for (i = 1; i <= n; i++)
	{
		my strings[i] = strings[i];
	}
	return me;
}

void _Strings_unlink (Strings me)
{
	my numberOfStrings = 0;
}

/* End of file Strings_extensions.c */
