/**********************************************************************
 * Copyright (c) 2002, Leo Seib, Hannover
 *
 * Project:SQLiteDataset C++ Dynamic Library
 * Module: StringHelper class realisation file
 * Author: Leo Seib      E-Mail: lev@almaty.pointstrike.net
 * Begin: 5/04/2002
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 **********************************************************************/

#include "stringhelper.h"

str_helper::str_helper()
{
	work_str = "";
}

str_helper::str_helper(const char *s)
{
	work_str = s;
}

string str_helper::get_str()
{
	return work_str;
}

void str_helper::set_str(const char *s)
{
	work_str = s;
};

string str_helper::before(string s, bool & is_found)
{
	is_found = false;
	int pos = work_str.find(s);
	int idx = pos + s.length();

	is_found = pos >= 0;
	if (idx == (int) work_str.length())
		return work_str.substr(0, pos);
	else
		if ((pos >= 0)
				&&
				(!((work_str[idx] > 48 && work_str[idx] < 58)
					 || (work_str[idx] > 64 && work_str[idx] < 91)
					 || (work_str[idx] > 97 && work_str[idx] < 123)
					 || work_str[idx] == 95)))
		return work_str.substr(0, pos);
	else													//return (string)NULL;
	{
		string tmp("");

		return tmp;
	}
}

string str_helper::after(string s)
{
	return work_str.substr(work_str.find(s) + s.length(), work_str.length());
}

string str_helper::replace(string pattern, string by_what)
{
	bool is_found;
	string bf = before(pattern, is_found);
	string aft("");
	string result("");

	while (is_found)
	{
		aft = after(pattern);
		result = bf + by_what + aft;
		work_str.assign(result);
		bf = before(pattern, is_found);
	}
	if (result.length() == 0)
		result = work_str.c_str();
	return result;
}