/* -----------------------------------------------------------------------------
 * The Cyberiada GraphML library implemention
 *
 * The string utilities
 *
 * Copyright (C) 2024 Alexey Fedoseev <aleksey@fedoseev.net>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser 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 https://www.gnu.org/licenses/
 *
 * ----------------------------------------------------------------------------- */

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

#include "cyberiadaml.h"
#include "cyb_string.h"

int cyberiada_copy_string(char** target, size_t* size, const char* source)
{
	char* target_str;
	size_t strsize;
	if (!source) {
		*target = NULL;
		*size = 0;
		return CYBERIADA_NO_ERROR;
	}
	strsize = strlen(source);  
	if (strsize > MAX_STR_LEN - 1) {
		strsize = MAX_STR_LEN - 1;
	}
	target_str = (char*)malloc(strsize + 1);
	strncpy(target_str, source, strsize);
	target_str[strsize] = 0;
	*target = target_str;
	if (size) {
		*size = strsize;
	}
	return CYBERIADA_NO_ERROR;
}

int cyberiada_string_is_empty(const char* s)
{
	while(*s) {
		if (!isspace(*s)) {
			return 0;
		}
		s++;
	}
	return 1;
}

int cyberiada_string_trim(char* orig)
{
	char* s;
	if (!orig) return 1;
	if (!*orig) return 0;
	s = orig + strlen(orig) - 1;
	while(s > orig) {
		if (isspace(*s)) {
			*s = 0;
			s--;
		} else {
			break;
		}
	}
	return 0;
}