get_next_line

Buffered C line reader for UNIX file descriptors.

Overview

get_next_line reads one line at a time from a UNIX file descriptor.

The implementation keeps unread data in a static per-file-descriptor buffer and reads chunks of BUFF_SIZE bytes until it reaches a newline, end of file, or an error.

API

int get_next_line(const int fd, char **line);

Return values:

Value	Meaning
1	A line was read
0	End of file
-1	Error

Build and Run

git clone https://github.com/itkrivoshei/get-next-line-c.git
cd get-next-line-c
make
./get_next_line path/to/file.txt

Read from standard input:

./get_next_line < path/to/file.txt

Change the buffer size at compile time:

make CFLAGS="-Wall -Wextra -Werror -DBUFF_SIZE=128"

Make Targets

Targets are defined in Makefile.

Target	Description
make	Build the get_next_line executable
make test	Run a smoke test for file and stdin input
make clean	Remove object files
make fclean	Remove objects and executable
make re	Rebuild from scratch

Repository Layout

Path	Purpose
get_next_line.c	Line-reading implementation
get_next_line.h	Public function declaration and constants
main.c	CLI smoke runner
libft/	Bundled support library
Makefile	Build, clean, and smoke-test targets

Automation

• ci.yml builds the project and runs the smoke test through GitHub Actions.

License

GPL-3.0