Arithmo

A fast and simple-to-use library for math expressions processing

Contents

• Usage
• Building and Installation
  • Dependencies
  • Building the project
  • Running example
  • Installing
• License
• Contributing

Usage

Here is an example of usage (for the full version see example/main.c file):

const char* expression = "(23 - 4) * 3";

// Creating an new arithmo instance:
artm_calc_t* calc = artm_calc_init(5); // 5 is the approximate number of variables that will be used

// Processing a mathematical expression:
artm_result_t result = artm_calc_eval(calc, expression);

// Saving the token to see exactly where the error is in the expression:
const artm_token_t* token = &result.as.token;

switch (result.status) {
  case ARTM_NULL_CALC:
    return printf("[ERROR] NULL_CALC\n");
  case ARTM_NULL_EXPR:
    return printf("[ERROR] NULL_EXPR\n");
  case ARTM_ALLOC_ERR:
    return printf("[ERROR] ALLOC_ERR\n");
  case ARTM_INV_TOKEN:
    return printf("[ERROR] INV_TOKEN -> '%.*s'\n", (int) token->size, token.target);
  case ARTM_UNDEF_VAR:
    return printf("[ERROR] UNDEF_VAR -> '%.*s'\n", (int) token->size, token.target);
  case ARTM_SUCCESS:
    return printf("[SUCCESS] %s = %g\n", expression, result.as.value);
}

// Destroying the instance:
artm_calc_free(calc);

After project building you can run this example as you can see here.

Also, you can see xcalc - an real example of using Arithmo.

Building and Installation

Dependencies

• C compiler (gcc, clang, etc…)
• cmake (>= 3.17)

These packages can usually be installed through your distributions package manager.

Building the project

To build the project, we first need to create a separate build directory:

mkdir build

Now that we’ve created our build directory (assuming it’s created in the project root), we can cd into it and run cmake and pass the parent directory path to it, which is where the CMakeLists.txt file is located:

cd build
cmake ..

Once cmake is done generating makefiles, we can build the library by running make inside our build directory:

make

Running example

./example

Installing

To install the library run:

sudo make install

By default, the libraries and headers will be installed in /usr/local/lib and /usr/local/include directories.

License

Arithmo 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. For more details, see LICENSE file.

Contributing

Contributions are welcome. If you have a feature request, or have found a bug, feel free to open a new issue. If you wish to contribute code, see CONTRIBUTING.md for more details.