0xmisha / math.h

Recreating the standard math.h library.

Summary of the math.h Project

The math.h project focuses on recreating the standard math.h library in the C programming language. This initiative has been designed to give developers a comprehensive understanding of computational methods while reinforcing the principles of structured programming.

Installation

git clone https://github.com/0xmisha/math.h.git
cd math.h/src
make

Requirements

• Gcc
• Make
• check.h (for tests)

Info

Here's a quick rundown of what was achieved:

• Reimplementation of math.h Functions: The project successfully reimplemented the following functions from the math.h library:

  • abs
  • acos
  • asin
  • atan
  • ceil
  • cos
  • exp
  • fabs
  • floor
  • fmod
  • log
  • pow
  • sin
  • sqrt
  • tan

• C11 Standard Compliance: All coding was done following the C11 standard using the gcc compiler.

• Code Structuring: Adherence to the Google coding style was maintained, and the project was structured as a static library. All source codes were organized in the src folder within the develop branch.

• Legacy Code Avoidance: Outdated and obsolete language constructs were deliberately avoided, and the POSIX.1-2017 standard was adhered to.

• Prefixing: Each function was prefixed with s21_ to maintain clarity and uniqueness.

• Unit Testing: A rigorous testing regime was set up using the Check library. The tests compared the results from the s21_math library with the standard math.h library to ensure accuracy.

• Coverage: Tests covered at least 80% of each function's code, as verified with gcov.

• Build Automation: A Makefile was provided to simplify the building process. It included targets like all, clean, test, s21_math.a, and gcov_report.

• gcov Reporting: The gcov report was made accessible in an HTML format to ensure transparency.

• Accuracy: A stringent accuracy threshold was maintained, with 16 significant digits for the total verifiable accuracy and up to 6 decimal places for the fractional part.