0.5.0

Changed LICENSE from restrictive GPL to permissive MIT

README.md

@@ -1,44 +1,45 @@
 ## Brought to you by:
 [![Quantum Leaps](https://www.state-machine.com/attachments/logo_ql_400.png)](https://www.state-machine.com)
+<hr>
 
----------------------------------------------------------------------
-[![Object-Oriented Programming in C](img/thumbnail.jpg)](https://www.state-machine.com/oop)
+[![GitHub release (latest by date)](https://img.shields.io/github/v/release/QuantumLeaps/OOP-in-C)](https://github.com/QuantumLeaps/OOP-in-C/releases/latest)
+[![GitHub](https://img.shields.io/github/license/QuantumLeaps/OOP-in-C)](https://github.com/QuantumLeaps/OOP-in-C/blob/master/LICENSE)
 
-# The Accompanying Code
+
+# Object-Oriented Programming in C
 This repository provides the code accompanying the article:
 ["Object-Oriented Programming"](https://www.state-machine.com/oop).
 The code can be compiled and executed on any desktop
 computer (running Windows, Linux, or macOS).
 
+<p align="center"><img src="img/thumbnail.jpg"/></p>
+
 Here is the code structure:
 
 ```
-OOP-in-C
-+---doc
+OOP-in-C/
++---doc/
 ¦       AN_OOP_in_C.pdf
 ¦
-+---encapsulation
++---encapsulation/
 ¦       main.c
 ¦       make.bat
-¦       oop_in_c.exe
 ¦       shape.c
 ¦       shape.h
 ¦
-+---inheritance
++---inheritance/
 ¦       main.c
 ¦       make.bat
-¦       oop_in_c.exe
 ¦       rect.c
 ¦       rect.h
 ¦       shape.c
 ¦       shape.h
 ¦
-+---polymorphism
++---polymorphism/
         circle.c
         circle.h
         main.c
         make.bat
-        oop_in_c.exe
         rect.c
         rect.h
         shape.c
@@ -75,13 +76,20 @@ The concepts of OOP in C have been explained in a series of videos:
 
 
 # The PDF Version
-The PDF version of the 
-["Object-Oriented Programming" article](https://www.state-machine.com/oop)
+The PDF version of the
+["Object-Oriented Programming" article](doc/AN_OOP_in_C.pdf)
 is provided in the directory `doc`
 
 [![Object-Oriented Programming in C](img/AN_OOP-in-C.jpg)](doc/AN_OOP_in_C.pdf)
 
 
+# Licensing
+The OOP-in-C source code and examples are released under the terms of the
+permissive [MIT open source license](LICENSE). Please note that the
+attribution clause in the MIT license requires you to preserve the
+original copyright notice in all changes and derivate works.
+
+
 # How to Help this Project?
 If you like this project, please give it a star (in the upper-right corner of your browser window):
 

encapsulation/main.c

@@ -1,27 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2018 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
-
+* 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 "shape.h"  /* Shape class interface */
 #include <stdio.h>  /* for printf() */
 

encapsulation/shape.c

@@ -1,27 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2018 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
-
+* 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 "shape.h" /* Shape class interface */
 
 /* constructor implementation */

encapsulation/shape.h

@@ -1,26 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2017 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
+* 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.
+============================================================================*/
 #ifndef SHAPE_H
 #define SHAPE_H
 

inheritance/main.c

@@ -1,27 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2018 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
-
+* 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 "rect.h"  /* Rectangle class interface */
 #include <stdio.h>  /* for printf() */
 

inheritance/rect.c

@@ -1,27 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2017 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
-
+* 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 "rect.h"
 
 /* constructor implementation */

inheritance/rect.h

@@ -1,26 +1,30 @@
-/*****************************************************************************
-* Code accompanying the Application Note:
+/*============================================================================
+* Code accompanying the Article:
 * "Object-Oriented Programming in C"
-* https://www.state-machine.com/doc/AN_OOP_in_C.pdf
+* https://github.com/QuantumLeaps/OOP-in-C
 *
-* Copyright (C) 2005-2017 Quantum Leaps. All Rights Reserved.
+* Copyright (C) 2006-2023 Quantum Leaps, <state-machine.com>.
 *
-* 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 3 of the License, or
-* (at your option) any later version.
+* SPDX-License-Identifier: MIT
 *
-* 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.
+* 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:
 *
-* You should have received a copy of the GNU General Public License
-* along with this program. If not, see <https://www.gnu.org/licenses/>.
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
 *
-* Contact Information:
-* https://www.state-machine.com
-****************************************************************************/
+* 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.
+============================================================================*/
 #ifndef RECT_H
 #define RECT_H