A 42 school project that implements a function to read a line from a file descriptor. This function reads from a file descriptor line by line, making it easier to process text files or input streams.

The get_next_line function reads a line from a file descriptor and returns it, handling memory efficiently. A line is considered a string of characters terminated by a newline (\n) or the end of file (EOF).

char *get_next_line(int fd);

• fd: The file descriptor to read from

• Returns the line that was read (including the terminating \n character if present)
• Returns NULL if there is nothing else to read or if an error occurred

• Reads from any valid file descriptor
• Works with both files and standard input
• Handles different buffer sizes through the BUFFER_SIZE define
• Memory efficient with proper memory allocation and deallocation
• No memory leaks
• Handles errors gracefully

• get_next_line.c: Main function implementation
• get_next_line_utils.c: Helper functions
• get_next_line.h: Header file with prototypes and includes

• ft_strlen: Calculate string length
• concat_str: Concatenate strings with specified length
• set_zero: Initialize memory to zero
• reset_str_sta: Reset static string buffer

The project should be compiled with the following flags:

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

The BUFFER_SIZE can be modified to any positive value. The project is designed to work efficiently with various buffer sizes.

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

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

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

• Does not handle binary files
• Uses one static variable to maintain the state between function calls
• File descriptor must be valid and readable
• BUFFER_SIZE must be greater than 0

maarjona (< [email protected]>)

This project is part of the 42 school curriculum.