This project has been created as part of the 42 curriculum by sarfreit.

Description

The get_next_line project consists of implementing a function that reads and returns one line at a time from a file descriptor. Its goal is to allow efficient line-by-line reading while handling partial reads and preserving state between function calls.

✅ Mandatory part

The project must:

• Read text one line per call
• Use only the read() function for input
• Store unfinished data in a static variable
• Return NULL when nothing is left to read
• Handle arbitrarily long lines and any buffer size

🧩 Bonus part

Additionally, the bonus version must:

• Support multiple file descriptors simultaneously
• Keep a separate static buffer for each FD
• Ensure the function remains independent across calls

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Instructions

The project is written in C and must be compiled with a defined BUFFER_SIZE.

Define BUFFER_SIZE and compile the mandatory files

cc -Wall -Wextra -Werror -D BUFFER_SIZE=42 main_mandatory.c get_next_line.c get_next_line_utils.c -o test_mandatory

Execute the tester

./test_mandatory

Define BUFFER_SIZE and compile the bonus files

cc -Wall -Wextra -Werror -D BUFFER_SIZE=10 main_bonus.c get_next_line_bonus.c get_next_line_utils_bonus.c -o test_bonus

Execute the tester

./test_bonus

Check for Leaks

valgrind --leak-check=full --show-leak-kinds=all ./test_mandatory

valgrind --leak-check=full --show-leak-kinds=all ./test_bonus

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Resources

For this project I used the help of some GitBooks from older students, and websites like GeeksforGeeks and W3Schools.