create

Author: mharriso

get_next_line.c

@@ -0,0 +1,36 @@
+#include "get_next_line.h"
+
+static	char			*ft_joinchr(char const *line, char c, size_t len)
+{
+	char		*s;
+	size_t		i;
+
+	if (!(s = (char*)malloc((len + 1) * sizeof(char))))
+		return (NULL);
+	i = 0;
+	while (i < len)
+		s[i++] = (*line) ? *line++ : c;
+	s[i] = '\0';
+	return (s);
+}
+
+int	get_next_line(char **line)
+{
+	char		buffer;
+	int			res;
+	char		*tmp;
+	size_t		len;
+
+	if (!line || !(*line = (char *)malloc(1)))
+		return (-1);
+	**line = '\0';
+	len = 0;
+	while ((res = read(0, &buffer, 1)) > 0 && buffer != '\n')
+	{
+		if (!(tmp = ft_joinchr(*line, buffer, ++len)))
+			return -1;
+		free(*line);
+		*line = tmp;
+	}
+	return (res);
+}

get_next_line.h

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+#ifndef GET_NEXT_LINE_H
+# define GET_NEXT_LINE_H
+
+# include <unistd.h>
+# include <stdlib.h>
+
+int	get_next_line(char **line);
+
+#endif

main.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   main.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: ncolomer <[email protected]>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/11 16:29:19 by ncolomer          #+#    #+#             */
+/*   Updated: 2019/11/14 19:20:21 by ncolomer         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "get_next_line.h"
+
+int
+	main(void)
+{
+	int		r;
+	char	*line;
+
+	line = NULL;
+	while ((r = get_next_line(&line)) > 0)
+	{
+		printf("%s\n", line);
+		free(line);
+		line = NULL;
+	}
+	printf("%s", line);
+	free(line);
+	line = NULL;
+}

subject.en.txt

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+Assignment name  : get_next_line
+Expected files   : get_next_line.c get_next_line.h
+Allowed functions: read, free, malloc
+--------------------------------------------------------------------------------
+
+Write a function will store, in the parameter "line", a line that has been read from the file descriptor 0.
+
+Your function must be prototyped as follows: int get_next_line(char **line);
+
+Your function should be memory leak free.
+
+What we call a "line that has been read" is a succession of 0 to n characters that end with '\n' (ascii code 0x0a) or with End Of File (EOF).
+
+The string stored in the parameter "line" should not contained any '\n'.
+
+The parameter is the address of a pointer to a character that will be used to store the line read.
+
+The return value can be 1, 0 or -1 depending on whether a line has been read, when the reading has been completed (meaning read has returned 0), or if an error has happened respectively.
+
+When you've reached the End Of File, you must store the current buffer in "line". If the buffer is empty you must store an empty string in "line".
+
+When you've reached the End Of File, your function should keep 0 memory allocated with malloc except the last buffer that you should have stored in "line".
+
+What you've stored in "line" should be free-able.
+
+Calling your function get_next_line in a loop will therefore allow you to read the text available on a file descriptor one line at a time until the end of the text, no matter the size of either the text or one of its lines.
+
+Make sure that your function behaves well when it reads from a file, from the standard output, from a redirection etc.
+
+No call to another function will be done on the file descriptor between 2 calls of get_next_line.
+
+Finally we consider that get_next_line has an undefined behavior when reading from a binary file.
+
+You should use the test.sh to help you test your get_next_line.

test.sh

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+gcc -Wall -Werror -Wextra get_next_line.c main.c -o get_next_line
+./get_next_line < get_next_line.c > yours_.res
+cat -e yours_.res > yours.res
+cat -e < get_next_line.c > original.res
+diff -y --suppress-common-line original.res yours.res
+rm -rf original.res yours_.res yours.res get_next_line