get_next_line is a crucial project in the 42 School curriculum, focusing on file I/O operations and static variables in C. This function allows you to read content line by line from a file descriptor, enhancing your understanding of:

• File descriptors
• Static variables
• Memory allocation and management
• Buffer handling

The main goal is to create a function that reads a line from a file descriptor each time it's called, returning the line that was read. If there's nothing else to read or if an error occurred, it should return NULL.

• Reads from any file descriptor (files, standard input, etc.)
• Returns one line at a time
• Handles multiple file descriptors simultaneously
• Efficient memory management to prevent leaks
• Graceful handling of various edge cases

• Uses only one static variable
• Manages multiple file descriptors without losing the reading thread on each of them

1. Clone the repository: bash git clone https://github.com/melaniereis/get_next_line.git cd get_next_line

2. Compile the project: bash gcc -Wall -Wextra -Werror -D BUFFER_SIZE=32 *.c

3. Include the header in your C file:

#include "get_next_line.h"

5. Use get_next_line in your code:

char *line = get_next_line(fd);

#include "get_next_line.h" #include <fcntl.h> #include <stdio.h>

int main(void) { int fd = open("example.txt", O_RDONLY); char *line;

while ((line = get_next_line(fd)) != NULL)
{
    printf("%s", line);
    free(line);
}
close(fd);
return 0;

}

text . ├── get_next_line.c # Main function implementation ├── get_next_line.h # Header file with function prototypes ├── get_next_line_utils.c # Utility functions └── Makefile # Compilation rules

Empty files
Files with only newline characters
Files with no newline characters
Very large files
Files with long lines
Files with varying line lengths
Reading from standard input
Reading from multiple file descriptors

You can create test files or use existing text files to cover these cases.