Awesome

ShivC (deprecated - see ShivyC instead)

SHIVC IS A DEPRECATED PROJECT:

I've moved to working on ShivyC, a complete rewrite of ShivC, for a few reasons:

• My coding style has improved significantly in 2016. ShivC's code is quite badly documented, badly tested, and tough to maintain by my current standards.
• ShivC was written in just a couple weeks, with no regard for optimization. The generated binaries are times exceedingly inefficient, and implementing some desired improvements would require very heavy rewrite of the code.
• ShivC produces assembly that is incompatble with x86 conventions in many ways, making it impossible to link ShivC binaries with files compiled by another compiler.
• My Python is getting sloppy, and I could use a refresher. I will no longer be contributing to ShivC, as my efforts are now focused on the improved ShivyC.

ShivC

A small C compiler witten in Python in a couple weeks over my winter break. Generates x64 Intel-format assembly, which is then assembled and linked by nasm and ld.

Tested on OS X El Capitan 10.11.1 64-bit, Python 3.4.3, and NASM 2.11.08. The assembly uses OS X system calls, so it certainly won't run on Linux or Windows, and it may not run on other versions of OS X.

Note: ShivC is not meant to generate binaries that run quickly. The output code is at times extremely inoptimal.

Features

See the tests folder for examples that compile. The function_test.c test is representative of the range of ShivC.

• Math
  • Operations: +, -, *, /, %, ++, --, &&, ||, !
  • Assignment: =, +=, -=, *=, /=, %=
  • Comparison: ==, !=, <, <=, >, >=
• int type variables
• Control structures:
  • if
  • while
  • for
  • break
  • continue
• Pointers (referencing and dereferencing)
• Arrays
• Function definition and calling
• \* ... */-form comments
• print statement: print n outputs the integer n to stdout.
  • This isn't in the C spec, but I included it to facilitate outputting values from the program; ShivC is nowhere near being able to compile the stdio C libraries.