This project, is a comprehensive text manipulation tool. It implements functionality to search and replace text within files, supporting command-line argument parsing, file I/O operations, and optional wildcard search capabilities.

• Command-Line Argument Parsing: Process arguments including search text, replacement text, optional wildcard flag, and line ranges.
• Text File Processing: Open, read, and write text files to implement the search and replace functionality.
• Search and Replace: Search for specific text in the input file and replace it with provided text in the output file.
• Wildcard Search: Implement an optional wildcard search feature to extend the functionality of text search.

The tool accepts various command-line arguments to specify the input and output files, text to search, replacement text, and additional options. Here's the general syntax:

• -s: Specify the text to search for in the input file. This option is required.
• -r: Specify the text that will replace the search text in the output file. This option is required.
• -w: Enable wildcard searching. This option is optional.
• -l: Specify the start and end lines to process in the input file. Lines outside this range are copied unmodified. This option is optional.

1. Basic Search and Replace

./text_tool -s hello -r world input.txt output.txt

This replaces all occurrences of "hello" with "world" in input.txt and writes the result to output.txt.

2. Wildcard Search

./text_tool -s he* -r wo -w input.txt output.txt

Using the wildcard option, this replaces words starting with "he" with "wo".

3. Line Range Specification

./text_tool -s hello -r world -l 5 10 input.txt output.txt

Performs the replacement only on lines 5 to 10 of the input file.

• Language: The tool is implemented in C.
• Libraries: Utilizes standard C libraries for string processing and file I/O operations.
• Error Handling: Includes comprehensive error handling to manage different edge cases and input errors.

This Text Manipulation Tool is a practical application of systems programming concepts, demonstrating file manipulation, command-line processing, and string operations in C.