<html><head></head><body><div style="width: 100%; padding: 24px 0 16px 0; background-color: #f5f5f5; text-align: center;"><div style="display: inline-block; width: 90%; min-width: 280px; text-align: left; font-family: Roboto,Arial,Helvetica,sans-serif;"><div style="height: 0px;" dir="ltr"></div><div style="display: block; padding: 0 2px;"><div style="display: block; background: #fff; height: 2px;"></div></div><div style="border-left: 1px solid #f0f0f0; border-right: 1px solid #f0f0f0;"><div style="padding: 24px 32px 32px 32px; background:#fff; border-right: 1px solid #eaeaea; border-left: 1px solid #eaeaea;" dir="ltr"><div style="font-size: 14px; line-height: 18px; color: #444;"><a href="mailto:mohitkumra95@gmail.com" style="color:inherit;text-decoration:none">Mohit Kumra</a> has invited you to comment on the following document:</div><div style="height: 10px;"></div><div style="font-size: 18px; display: table;"><div style="display: table-row; border-bottom: 4px solid #fff;"><div style="height: 32px;"><img src="https://ssl.gstatic.com/docs/documents/share/images/services/document-4.png" aria-label="Document" style="vertical-align: middle; max-width: 24px;"/></div><a href="https://docs.google.com/document/d/1H3BfMBfTh8yHVpaGKfdfXtm_ZD6Mnd7impXOiRfpka4/edit?usp=sharing_eid&invite=CPzb1pEG&ts=56f4f059" style="color: #3367d6; text-decoration: none; vertical-align: middle;">GSOC_2016_proposal_Compilation_Firewall</a><div itemprop="action" itemscope itemtype="http://schema.org/ViewAction"><meta itemprop="url" content="https://docs.google.com/document/d/1H3BfMBfTh8yHVpaGKfdfXtm_ZD6Mnd7impXOiRfpka4/edit?usp=sharing_eid&invite=CPzb1pEG&ts=56f4f059"></div></div></div><div style="height: 16px;"></div><div style="height: 1px; background-color: #eee;"></div><div style="height: 24px;"></div><div style="display: table-row;"><img style="display: table-cell;" width="50" src="https://drive.google.com/c/u/0/photos/public/AIbEiAIAAABDCN2ZuOeS0oHLAiILdmNhcmRfcGhvdG8qKGFkZmE5NjM2ZmIxNTk4YjgzYjQ4ODE0ZjVmZjU5MTQ5MmZhOTZiZGYwAYBRF6Ik2ntwOYZ0yz2ldMw4XvEf" alt="Sender's profile photo">I am extremely interested in working for the OutputDevice class Compilation Firewall project I have C,C++,Java,scripting,Python,and have working proficiency of STL. It is requested to review the Proposal for Output-Device use a Compilation Firewall for Libreoffice. Thank you for the consideration.A quick reply is appreciated!!</div><div style="height: 32px;"></div><div><a href="https://docs.google.com/document/d/1H3BfMBfTh8yHVpaGKfdfXtm_ZD6Mnd7impXOiRfpka4/edit?usp=sharing_eid&invite=CPzb1pEG&ts=56f4f059" target="_blank" style="background-color: #4d90fe; border: 1px solid #3079ed; border-radius: 2px; color: white; display: inline-block; font-family: Roboto,Arial,Helvetica,sans-serif; font-size: 11px; font-weight: bold; height: 29px; line-height: 29px; min-width: 54px; outline: 0px; padding: 0 8px; text-align: center; text-decoration: none">Open in Docs</a></div><div style="height: 24px;"></div><div style="background: #fce8b2; font-size: 13px; color: #444; border-radius: 2px; padding: 5px 10px;">This email grants access to this item without logging in. Only forward it to people you trust.</div><div style="height: 16px;"></div><div style="height: 1px; background-color: #eee;"></div><div style="height: 24px;"></div><div style="font-style: italic;">Snapshot of the item below:</div><div style="padding: 10px 0;"><h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.6;font-family:"Arial";text-align:center;padding-right:0">Output-Device use a Compilation Firewall for Libreoffice</h3><h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.6;font-family:"Arial";text-align:center;padding-right:0">MOHIT KUMRA</h3><h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.6;font-family:"Arial";text-align:center;padding-right:0">MARCH 23rd 2016</h3><h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.6;font-family:"Arial";height:14pt;text-align:center;padding-right:0"></h3>MENTOR: Chris Sherlock<h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.15;font-family:"Arial";text-align:left;padding-right:0">Student Name: MOHIT KUMRA</h3>DATE: MARCH 23rd 2016TITLE: Compilation firewall for Libreoffice and Modularizing the Output-Device class.<h3 style="padding-top:4pt;margin:0;color:#434343;padding-left:0;font-size:14pt;padding-bottom:0pt;line-height:1.6;font-family:"Arial";text-align:left;padding-right:0">SYNOPSIS:</h3>Data abstraction refers to, providing only essential information to the outside world and hiding their background details.With the introduction of this concept programs and developers now could easily write the code and had lesser chances of depiction of all the features to all thus minimizing the threat of code corruption.I would recommend to make the compilation firewall for the Output-Device class and to split the functionality of the Output-Device class. This would minimize the massive load due to functionality being encapsulated into a dense form in the Output-Device class, thereby enabling programs to run faster with inclusion of the Compilation Firewall.The Project:In any programming language writing code does not imply that it is in alignment with the guidelines but one needs to ensure that the code is protected and secure against corruption/malwares thereby having zero or minimal code smells.The concept of Data abstraction provides us with the feature of hiding the details and depicting only the essential details to the end user. For this we use the PIMPL Idiom (Pointer to IMPLementation) is a technique for implementation hiding in which a public class wraps a structure or class that cannot be seen outside the library the public class is part of. This hides internal implementation details and data from the user of the library.These are the Benefits of using PIMPL Idiom:Benefits:<ol style="padding:0;margin:0"><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Changing private member variables of a class does not require recompiling classes that depend on it, thus make times are faster, and the well known Fragile Binary Interface Problem() is reduced.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">The header file does not need to #include classes that are used 'by value' in private member variables, thus compile times are faster.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">This is sort of like the way Small Talk (a well known unusual syntax based language) automatically handles classes... more pure encapsulation.</li></ol>The Implementation of making the Compilation Firewall file with the help of the pmlpl idom format is as follows:How to do it:<ol style="padding:0;margin:0"><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Put all the private member variables into a struct.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Put the struct definition in the .cpp file.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">In the header file, put only the Forward Declaration of the struct.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">In the class definition, declare a (smart) pointer to the struct as the only private member variable.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">The constructors for the class need to create the struct.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">The destructor of the class needs to destroy the struct (possibly implicitly due to use of a smart pointer).</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">The assignment operator and Copy Constructor need to copy the struct appropriately or else be disabled.</li></ol>To study for Compilation file links are:<ol style="padding:0;margin:0"><li style="margin-left:108pt;padding:0;color:#000000;font-size:11pt;font-family:"Arial";margin-top:0;margin-bottom:0;margin-right:0"><a href="https://www.google.com/url?q=http://c2.com/cgi/wiki?PimplIdiom&sa=D&ust=1458896488814000&usg=AFQjCNF92l549sJWoCrSXIdcjzGOWKYZ9A" style="color:inherit;text-decoration:inherit">http://c2.com/cgi/wiki?PimplIdiom</a></li><li style="margin-left:108pt;padding:0;color:#000000;font-size:11pt;font-family:"Arial";margin-top:0;margin-bottom:0;margin-right:0"><a href="https://www.google.com/url?q=http://stackoverflow.com/questions/60570/why-should-the-pimpl-idiom-be-used&sa=D&ust=1458896488815000&usg=AFQjCNGbw8lwAK_xGSfz8PQkt_iL0k8GOg" style="color:inherit;text-decoration:inherit">http://stackoverflow.com/questions/60570/why-should-the-pimpl-idiom-be-used</a></li><li style="margin-left:108pt;padding:0;color:#000000;font-size:11pt;font-family:"Arial";margin-top:0;margin-bottom:0;margin-right:0"><a href="https://www.google.com/url?q=http://herbsutter.com/gotw/_100/&sa=D&ust=1458896488816000&usg=AFQjCNF8I_uyZuyRssarUN-e7p4gzM98DQ" style="color:inherit;text-decoration:inherit">http://herbsutter.com/gotw/_100/</a></li></ol>Example:#include <iostream>using namespace std;class Adder1{ public: // constructor Adder1(int i = 0) { total1 = i; } // interface to outside world void addNum1(int number) { total1 += number; } // interface to outside world int getTotal1() { return total1; }; private: // hidden data from outside world int total1;};int main( ){ Adder1 a; a.addNum1(10); a.addNum1(20); a.addNum1(30); cout << "Total " << a.getTotal1() <<endl; system("pause"); return 0;}The Output is : Total 60Above class adds numbers together, and returns the sum. The public members addNum1 and getTotal1 are the interfaces to the outside world and a user needs to know them to use the class. The private member total1 is something that the user doesn't need to know about, but is needed for the class to operate properly.Road-Map: For Project Development, following steps would be followed:1. Review: On acceptance of the proposal for the project I would review the code provided by the Mentors and try to analyse and familiarize with the Data members and Data functions being used in the code. (May 23rd - May 30th 2016)2. Refactor: After reviewing the code, I will use my skillset for refactoring the code. Thus making the code more effective and efficient in terms of complexity( Time + Space ) and would modularize the code as much as possible. This would take less than a week to complete.(June 2016)3. Step 2 would help in achieving the goal of reducing the massive Output-Device class code into modules and subclasses.4. Develop: Parallel to modularizing the Output-Device class code I would deduce and implement a methodology for making the compilation firewall for the Output-Device class of the LibreOffice.(June 20th - July 20th 2016 ) Design Strategy: Abstraction separates code into interface and implementation. So while designing the component, I will keep interface independent of the implementation so that if I change underlying implementation the interface would remain intact.Steps to be followed would include:a. Put all the private member variables into a struct.b. Put the struct definition in the .cpp file.c. In the header file, put only the Forward Declaration of the struct.d. In the class definition, declare a pointer to the struct as the only private member variable.e. The constructors for the class need to create the struct.f. The destructor of the class needs to destroy the struct (possibly implicitly due to use of a smart pointer).g. The assignment operator and Copy Constructor need to copy the struct appropriately or else be disabled.5. Reconcile:On achieving the goal of the project would Reconcile the work and provide the Mentor with all possible updates and features of the development with the help of DFD (Data flow Diagrams) and all the documentation required by the Mentor.(Last week of July- August 2016)Conclusion:When the Project would achieve the goals it would be suitable for implementation to the system. The Output-Device class would then be modularized and its compilation firewall would also be implemented effectively. Proficiency:<ul style="padding:0;margin:0"><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">I am proficient in C,C++,JAVA and have worked on developmental projects undertaking these languages.</li><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:11pt;line-height:1.2717391304347827;margin-right:0;margin-left:36pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Resume link: <a href="https://www.google.com/url?q=https://drive.google.com/file/d/0B7RrMabDB-4FU3VURDBMUlprU3M/view?usp%3Dsharing&sa=D&ust=1458896488834000&usg=AFQjCNGCsIQTt1B3q22MvUy1UsNT4Wuq8g" style="color:inherit;text-decoration:inherit">https://drive.google.com/file/d/0B7RrMabDB-4FU3VURDBMUlprU3M/view?usp=sharing</a></li></ul>University Information:<ul style="padding:0;margin:0"><li style="padding-top:0;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:35pt;line-height:1.6000000000000003;margin-right:0;margin-left:72pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">University Name: JAYPEE INSTITUTE OF INFORMATION TECHNOLOGY</li><li style="padding-top:2pt;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:35pt;line-height:1.6000000000000003;margin-right:0;margin-left:72pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Major:COMPUTER SCIENCE ENGINEERING</li><li style="padding-top:2pt;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:35pt;line-height:1.6000000000000003;margin-right:0;margin-left:72pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Current Year and Expected Graduation date: 3rd YEAR & 31-06-2017</li><li style="padding-top:2pt;color:#000000;padding-left:0pt;font-size:11pt;padding-bottom:35pt;line-height:1.6000000000000003;margin-right:0;margin-left:72pt;font-family:"Arial";margin-top:0;margin-bottom:0;padding-right:0">Degree (e.g. BSc, PhD):B.Tech </li></ul></div></div></div><table style="width: 100%; border-collapse: collapse;" role="presentation"><tr><td style="padding: 0px;"><table style="border-collapse: collapse; width: 3px;" role="presentation"><tr height="1"><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td><td width="1" bgcolor="#e5e5e5" style="padding: 0px;"></td></tr><tr height="1"><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td></tr><tr height="1"><td width="1" bgcolor="#f5f5f5" style="padding: 0px;"></td><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td></tr></table></td><td style="width: 100%; padding: 0px;"><div style="height: 1px; width: auto; border-top: 1px solid #ddd; background:#eaeaea; border-bottom: 1px solid #f0f0f0;"></div></td><td style="padding: 0px;"><table style="border-collapse: collapse; width: 3px;" role="presentation"><tr height="1"><td width="1" bgcolor="#e5e5e5" style="padding: 0px;"></td><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td></tr><tr height="1"><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td><td width="1" bgcolor="#eaeaea" style="padding: 0px;"></td><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td></tr><tr height="1"><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td><td width="1" bgcolor="#f0f0f0" style="padding: 0px;"></td><td width="1" bgcolor="#f5f5f5" style="padding: 0px;"></td></tr></table></td></tr></table><table style="padding: 14px 10px 0 10px;" role="presentation" dir="ltr"><tr><td style="width: 100%; font-size:11px; font-family: Roboto,Arial,Helvetica,sans-serif; color:#646464; line-height: 20px; min-height: 40px; vertical-align: middle;">Google Docs: Create and edit documents online.</td><td style="padding-left: 20px; vertical-align: middle;"><a href="https://drive.google.com" target="_blank"><img src="https://www.gstatic.com/images/branding/googlelogo/1x/googlelogo_tm_black54_color_96x40dp.png" width="96" alt="Logo for Google Docs" border="0"></a></td></tr></table></div></div></body></html>