/GetNextLine

Primary LanguageC

# Get Next Line

Get Next Line

Project

Get Next Line is one of the three project in the 42 program second circle. It aims to introduce the students to 2 new concept of C language, the File Descriptor and the static variable by creating a function to read line by line a file.

Constraints

According to the subject there is 3 contraints for this project:

  • The global variables are prohibited.
  • The lseek function is forbidden.
  • The whole files of the projects need to follow 42 norm (Link)

External function(s) allowed

  • read
  • malloc
  • free

Behavior

Argument(s)

  • A int containing the fd of the file to read.

Return

  • The next readable line ended by a "\n" if that's not the last line of the file.
  • if the next readable line is empty the function return NULL

Bonus part

Description Mark
Use one or less static variable. ✅
Be able to read multiple File Descriptor at the same time. ✅

Usage

  1. Include Get Next Line Header " get_next_line.h " in your main file
  2. Print the return of the function.
  3. Compile your files with: 
    cc -Wall -Wextra -Werror -D BUFFER_SIZE=42 <files>.c
  4. Launch the compiled program.

Usage exemple

Here a simple main exemple

#include "get_next_line.h"
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main()
{
	int fd = open("testfile.txt", O_RDONLY);
	if (fd <= 2)
	{
		write(2, "No such file\n", 14);
		return 1;
	}
	char *buffer = NULL;
	buffer = get_next_line(fd);
	while (buffer != NULL)
	{
		printf("%s", buffer);
		free(buffer);
		buffer = get_next_line(fd);
	}
	close(fd);
}