ccpy

C compiler implemented in Python for x86, CS335 2021-22 II, Group No. 10

Our implementation of the C compiler follows grammar rules for ANSI C (C89). One of major differences in this version of C is the need to declare variables at the start of the scope. Therefore our compiler would be able to work with code that is compliant with C89 standards.

Source Language : C (ANSI C89)
Implementation Language : Python 3
Target Language : x86 Assembly (32-bit)

Usage

Lexer

python src/lexer.py -h
usage: lexer.py [-h] [-d] [-o OUT] infile

positional arguments:
  infile             Input File

optional arguments:
  -h, --help         show this help message and exit
  -d, --debug        Debug Mode
  -o OUT, --out OUT  Store output of lexer in a file

Parser

python src/parser.py -h
usage: parser.py [-h] [-d] [-o OUT] infile

positional arguments:
  infile             Input File

optional arguments:
  -h, --help         show this help message and exit
  -d, --debug        Parser Debug Mode
  -o OUT, --out OUT  Store output of parser in a file

Codegen

python src/codegen.py
usage: codegen.py  infile

Generating Automaton Graph

Note: This is a time consuming step.

Make sure you have graphviz installed, which is a tool for generating graphs.

You need to first run parser in debug mode to generate parser.out

$ python src/automaton.py
$ dot -Tpdf -O automaton.dot

Structure

For installing Dependencies

$ make install
# OR
$ pip install --ignore-installed -r ./requirements.txt  

For running individual lexer tests

• make sure that you are the home directory, i.e., ccpy

$ python3 ./src/lexer.py -o out/lexer/1.out ./test/lexer/test1.c

For running all lexer tests at once

$ make lexer-tests 

For running individual parser tests

• make sure that you are the home directory, i.e., ccpy

$ python3 ./src/parser.py -o out/parser/1.out ./test/parser/test1.c

For running all parser tests at once

$ make parser-tests 

For cleaning the test outputs

$ make clean 

Contributors

Naman Gupta
Ayush Shakya
Soham Ghosal
Lakshay Rastogi