Diff Utility (x86-64 Assembly)

This project is a simplified version of the Unix diff tool, implemented in x86-64 assembly (AT&T syntax).
It compares two text inputs line by line and highlights the differences, with optional flags for case-insensitivity and blank-line handling.

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📂 Project Structure

• diff.s
  Contains the full implementation:

  • main: Parses command-line arguments and sets flags (-i, -B).
  • diff: Core comparison logic.
  • compareLines: Compares two lines, optionally ignoring case (-i).
  • printDifferentLines: Outputs differences in a readable format.

• Example input (hardcoded in diff.s for now):

  file1 = "a\nkFds\nfdsan\nabc\n"
  file2 = "A\nkFds"
  
  

⚙️ Building

Use gcc to assemble and link the program. For example:

gcc -no-pie diff.s -o diff

This creates an executable called diff.

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▶️ Usage

For now, diff.s contains two hardcoded input strings (file1 and file2).
When you run the program, it compares those and prints the differences.

Example:

./diff

Output format:

1c1
< a
----
> A

Command-line flags

The program supports two optional flags:

• -i → Ignore case differences (e.g., "a" == "A")
• -B → Ignore blank lines when comparing

Example:

./diff -i
./diff -B
./diff -i -B