The source codes is from infintuary.org: http://www.infintuary.org/stpcsc.php
This is the license specified in the source codes:
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// This source code is provided 'as-is', without any express or implied //
// warranty. In no event will Infintuary be held liable for any damages //
// arising from the use of this software. //
// //
// Infintuary does not warrant, that the source code will be free from //
// defects in design or workmanship or that operation of the source code //
// will be error-free. No implied or statutory warranty of merchantability //
// or fitness for a particular purpose shall apply. The entire risk of //
// quality and performance is with the user of this source code. //
// //
// Permission is granted to anyone to use this software for any purpose, //
// including commercial applications, and to alter it and redistribute it //
// freely, subject to the following restrictions: //
// //
// 1. The origin of this source code must not be misrepresented; you must //
// not claim that you wrote the original source code. //
// //
// 2. Altered source versions must be plainly marked as such, and must not //
// be misrepresented as being the original source code. //
// //
// 3. This notice may not be removed or altered from any source //
// distribution. //
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