Get_next_line

The get_next_line project of 42 school aims to create a function in C that reads a line from a file descriptor efficiently.

Description

The get_next_line function allows reading a complete line from a file descriptor each time it is called, returning the line read including the newline character (\n) if present. The function should handle multiple calls continuously, allowing successive lines to be read from the file.

Functions

The project includes the following functions:

• ft_read_write: Reads from the file descriptor and saves the content in a buffer until a newline character is found.
• ft_print: Extracts and returns the line read from the buffer.
• ft_cleansave: Cleans and updates the buffer by removing the line that has already been read.
• get_next_line: The main function that coordinates the reading, printing, and cleaning of the buffer.

Usage

To use the get_next_line function, follow these steps:

1. Compile the code along with a main file (main.c) that calls get_next_line.
2. Open a file using the open function to obtain its file descriptor.
3. Call get_next_line passing the file descriptor and process the returned line.
4. Repeat the process until get_next_line returns NULL, indicating there are no more lines to read.

Example Usage

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

int main(void)
{
    int fd;
    char *line;

    fd = open("example.txt", O_RDONLY);
    if (fd < 0)
        return (1);
    while ((line = get_next_line(fd)) != NULL)
    {
        printf("%s", line);
        free(line);
    }
    close(fd);
    return (0);
}