rpn_engine

Reverse Polish Notation engine for a pocket calculator

Description

A collection of the Classes/Functions for an RPN Calculator. Following classes/functions are provided :

• AntiChattering class: Kill the chattering on physical key.
• Console class : UIF center of a calculator. It support editing and displaying.
• EncodeKey() : Convert the position in key matrix to the command.
• SegmentDecoder class : Convert the digit character to the segment pattern.
• StackStrategy class : Stack machine template.

This is targeting the SHARP EL-21x pocket calculator. Thus, follows restriction exists :

• The Console class assume 9digits display.
• The EncodeKey function assumes the key matrix of the EL-21x.

The rpn2026 project is a client of this library.

To obtain the reference manual, run doxygen :

cd doc
doxygen Doxyfile

The document is generated in the html sub-directory.

Structure

This library contains several classes and a function. Each component has its own functionality and behavior. Thus, their usage is fixed from the first. The Following figure depict the signal flow of an electronic calculator based on this library.

Environment

This library is tested by following environment

• Ubuntu 22.04 LTS
• GitHub Actions ubuntu-latest ( GCC 9 )
• GitHub Actions windows-latest ( MSVC 2022 )
• GCov ( with GCC )
• Doxygen

Install

Run following command :

mkdir build
cd build
cmake ..
cmake --build . 

The library is created in the build/src directory. You can run test program by :

ctest

License

This project is shared with the MIT License.