Run COBOL using Apache Server

COBOL compiled to an EXE in windows can be placed in Apache cgi-bin folder or any other folder where ExecCGI is enabled

Enable CGI module in Apache

LoadModule cgi_module modules/mod_cgi.so

Write COBOL code "gnucobolcgi.cob"

Run COBOL in windows

Why COBOL in 2020?

The reason is, many migration still happening from mainframe COBOL to Java or .NET

If the developer knows how test the COBOL in his local machine, then it benefits the migration to speed up

This article demonstrates the Cygwin dependencies to compile gnuCOBOL from source code

Install Cygwin with below list of dependencies

Cygwin is an amazing POSIX based development environment which offers unix like environment with shared library options

But, when you try to install, it will ask for administrative privileges

This article helps command line based argument to install Cygwin without admin right

Type this below command to install Cygwin without admin rights

Run REXX in windows

This article explains, how to compile and install REXX in MSYS2 with GCC compiler installation

Step 1: Install Cygwin same as gnuCOBOL installation document 

Additionally install regina-rexx which shipped with cygwin

Step 2: Check GCC version

This article demonstrates easy way of generating C++ stub code including Java Generation for the corresponding C++ Classes using SWIG

The Gradle KTS project contains a sub module which contains the main source code, the header file and the SWIG file

The Gradle KTS is written in such way it will call the "swig" command line and generates the wrappers and copies the files to corresponding locations

The C++ compiler is auto chosen by Gradle cpp-library plugin, there is no need to write CMake or MakeFile or batch files for that

Code written in kotlin will get transformed to JavaScript NPM module which can be executed directly from Node.JS

GitHub https://github.com/dickensas/kotlin-gradle-templates/tree/master/js-nodejs

Simple Kotlin code

fun main() {
   println ("hello")
   test1()
}

The package.json which is manually created at root folder of the project

This article explains how to run STM32 embedded board in an emulator on windows

Step 1: Install Nodejs

Install Nodejs from https://nodejs.org/en/

WebGLRenderingContext is a big API, it has 200+ properties and 100+ methods, writing a JavaScript stub and corresponding Kotlin stub is very difficult 

We need to write 1400+ lines of JavaScript code and 3000+ lines Kotlin code

This Kotlin gradle script provides a simple approach to auto generate the stub and also compile the generated code to .klib

Gradle Stub Code in KTS

Kotlin WebAssembly runtime provides a global JavaScript array called heap

which can be accessed if the pointer of a variable is known

The pointer and size of the variable can be determined by library methods stringPointer and stringLengthBytes

The from JavaScript the value can be updated with below logic

Kotlin Main Code

From JavaScript as of now we cannot pass string to WebAssembly, therefore the string will be converted to an array of bytes and kept in browser's memory object of the kotlin web assembly framework object kotlinObject

From WebAssembly by calling the JavaScript method for each character, transfer the numeric value

Then convert the numeric value to character and combine to a string in kotlin

This is achieved using below code

JavaScript: string to UTF array utlity