view lwlib/lw_stringlist.c @ 467:a6c9129e5948

Move version header into a common direction to better reflect what it is. The version header isn't really associated with lwlib itself since that is intended to be some generic type routines that can be used by other programs. It is, however, directly associated with lwtools. Thus, it should be related to lwtools itself rather than the more generic lwlib.
author William Astle <lost@l-w.ca>
date Thu, 01 Mar 2018 21:25:51 -0700
parents a1a88a8ddc98
children
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/*
lw_stringlist.c

Copyright © 2010 William Astle

This file is part of LWTOOLS.

LWTOOLS 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, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>

#define ___lw_stringlist_c_seen___
#include "lw_stringlist.h"
#include "lw_string.h"
#include "lw_alloc.h"

lw_stringlist_t lw_stringlist_create(void)
{
	lw_stringlist_t s;
	
	
	s = lw_alloc(sizeof(struct lw_stringlist_priv));
	s -> strings = NULL;
	s -> nstrings = 0;
	s -> cstring = 0;
	
	return s;
}

void lw_stringlist_destroy(lw_stringlist_t S)
{
	if (S)
	{
		int i;
		for (i = 0; i < S -> nstrings; i++)
		{
			lw_free(S -> strings[i]);
		}
		lw_free(S -> strings);
		lw_free(S);
	}
}

void lw_stringlist_addstring(lw_stringlist_t S, char *str)
{
	S -> strings = lw_realloc(S -> strings, sizeof(char *) * (S -> nstrings + 1));
	S -> strings[S -> nstrings] = lw_strdup(str);
	S -> nstrings++;
}

void lw_stringlist_reset(lw_stringlist_t S)
{
	S -> cstring = 0;
}

char *lw_stringlist_current(lw_stringlist_t S)
{
	if (S -> cstring >= S -> nstrings)
		return NULL;
	return S -> strings[S -> cstring];
}

char *lw_stringlist_next(lw_stringlist_t S)
{
	S -> cstring++;
	return lw_stringlist_current(S);
}

int lw_stringlist_nstrings(lw_stringlist_t S)
{
	return S -> nstrings;
}

lw_stringlist_t lw_stringlist_copy(lw_stringlist_t S)
{
	lw_stringlist_t r;
	
	r = lw_alloc(sizeof(lw_stringlist_t));
	r -> nstrings = S -> nstrings;
	if (S -> nstrings)
	{
		int i;
		
		r -> strings = lw_alloc(sizeof(char *) * S -> nstrings);
		for (i = 0; i < S -> nstrings; i++)
		{
			r -> strings[i] = lw_strdup(S -> strings[i]);
		}
	}
	return r;
}