https://github.com/ciavash/simple-c-parser

A simple parser for C language.
https://github.com/ciavash/simple-c-parser

Last synced: over 1 year ago
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A simple parser for C language.

• Host: GitHub
• URL: https://github.com/ciavash/simple-c-parser
• Owner: CIAvash
• License: gpl-3.0
• Archived: true
• Created: 2013-07-02T10:38:34.000Z (about 13 years ago)
• Default Branch: master
• Last Pushed: 2013-07-02T10:40:36.000Z (about 13 years ago)
• Last Synced: 2025-03-13T07:27:22.932Z (over 1 year ago)
• Language: Perl
• Homepage: https://codeberg.org/CIAvash/simple-c-parser
• Size: 172 KB
• Stars: 9
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

          
Simple C Parser

===============

This is a simple C parser script I wrote for a university project (Principles of Compiler Design course).

scanner.pl and parser.pl are separate and do not depend on each other. A simplified version of scanner.pl is used in parser.pl.

Scanner does the lexical analysis(using regular expressions) and Parser does the syntax analysis.

The simple C grammar along with FIRST and FOLLOW sets and parse table are in the `documents` directory. The LL(1) C grammar is the LL(1) version of Simple C grammar you get after left factoring and left recursion removal.

Text::SimpleTable module is required for drawing symbol table and output of parser. You can install it with cpanminus:

`sudo cpanm Text::SimpleTable`

Usage

-----

Perl scripts should be marked as executable. You can achieve this with the following command:

`chmod +x scanner.pl parser.pl`

Scanning C source code:

`./scanner.pl [file_name]`

Parsing C source code:

`./parser.pl [-s] [file_name]`

`-s` option tells the script to print the symbol table.

If you want to type the C code directly, don't enter the file name. When you finished entering C code, hit Ctrl-D.

If you can't see the whole output in the terminal, pipe it to `less`:

`./parser.pl [-s] [file_name] | less`

Here is some dummy code to show you what can be parsed and scanned:

For scanner:

    /* Multi-line

    comment */

    int main() {

        int i = 2.56e+2;

        // Comment

        char ch = 'a';

        i++;

        i--;

        i*=5;

        i/=2;

        return 0;

    }

For parser:

    main() {

        int a[10];

        int i;

        int j;

        i = 4;

        j=i*6;

        if(j<10) {

            j = j - 1;

        }

        return 0;

    }