lua_module-simplecalc

A very simple lua_module calculator made with only 40 line of C code and is for learning purpose. The code demonstrating uses of typedef, struct, and simple string parsing in C programming and how to use Lua C API. calclua accept string expression in this format:

(number) (operator) (number)

example

calc("66+33")
calc("100/95")
calc("3.142*66")
calc("88-13")

calclua only support addition, multiplication, division and substraction.

Accuracy of this module is never tested and must never be used in serious work/production.

example

Lua 5.3.5  Copyright (C) 1994-2018 Lua.org, PUC-Rio
> require("calclua")
true
> calc("88+7")
95.0
> calc("90*5")
450.0
> calc("90h5")
wrong operator. simplecalc only support addition, multiplication, division and substraction
0.0

compilation

Just compile the main source file calclua.c with your favorite C compiler, e.g gcc -L. -shared -fPIC -o calclua.so calclua.c -llua

license

MIT License

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:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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.