Add get_next_line to libft

5 files changed, 176 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index 6bf4a1a..7bab267 100644
--- a/Makefile
+++ b/Makefile
@@ -39,7 +39,9 @@ SRC_FILES = ft_atoi.c \
 			ft_printf.c \
 			ft_printnbr.c \
 			ft_printhex.c \
-			ft_printaddr.c
+			ft_printaddr.c \
+			get_next_line.c \
+			get_next_line_utils.c
 
 
 OBJ_FILES = $(SRC_FILES:.c=.o)
@@ -62,7 +64,7 @@ $(NAME): $(OBJ_FILES)
 	ar rcs $(NAME) $(OBJ_FILES)
 
 clean:
-	rm -f $(OBJ_FILES) $(BONUS_FILES)
+	rm -f $(OBJ_FILES) $(BONUS_OBJ)
 
 fclean: clean
 	rm -f $(NAME)
diff --git a/get_next_line.c b/get_next_line.c
new file mode 100644
index 0000000..46edb73
--- /dev/null
+++ b/get_next_line.c
@@ -0,0 +1,84 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/15 14:13:51 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/25 15:26:21 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+
+static int	get_next_line_len(char *buf, int pos)
+{
+	int	len;
+
+	len = 0;
+	while (pos + len < BUFFER_SIZE)
+	{
+		if (buf[pos + len] == '\n')
+		{
+			len++;
+			break ;
+		}
+		if (!buf[pos + len])
+			break ;
+		len++;
+	}
+	return (len);
+}
+
+static void	get_next_line_rec(int fd, char *buf, char **result, int pos)
+{
+	int	len;
+	int	i;
+	int	readlen;
+
+	len = get_next_line_len(buf, pos);
+	*result = str_add_buffer(*result, buf + pos, len);
+	if (pos + len == BUFFER_SIZE && buf[BUFFER_SIZE - 1] == '\n')
+		return (clear_buffer(buf, pos));
+	i = 0;
+	while (i < len)
+		buf[pos + i++] = '\0';
+	if (pos + len == BUFFER_SIZE && *result)
+	{
+		readlen = read(fd, buf, BUFFER_SIZE);
+		if (readlen < 0)
+		{
+			clear_buffer(buf, 0);
+			free(*result);
+			*result = NULL;
+		}
+		else if (readlen > 0)
+			get_next_line_rec(fd, buf, result, 0);
+	}
+}
+
+char	*get_next_line(int fd)
+{
+	static char	buf[BUFFER_SIZE];
+	int			i;
+	char		*result;
+	int			readlen;
+
+	i = 0;
+	readlen = 0;
+	result = NULL;
+	while (i < BUFFER_SIZE && !buf[i])
+		i++;
+	if (i == BUFFER_SIZE)
+	{
+		readlen = read(fd, buf, BUFFER_SIZE);
+		if (readlen < 0)
+			clear_buffer(buf, 0);
+		else if (readlen > 0)
+			return (get_next_line(fd));
+		return (NULL);
+	}
+	get_next_line_rec(fd, buf, &result, i);
+	return (result);
+}
diff --git a/get_next_line.h b/get_next_line.h
new file mode 100644
index 0000000..63c477b
--- /dev/null
+++ b/get_next_line.h
@@ -0,0 +1,26 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line.h                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/15 14:14:07 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/25 14:19:27 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef GET_NEXT_LINE_H
+# define GET_NEXT_LINE_H
+# include <stdlib.h>
+# include <unistd.h>
+
+# ifndef BUFFER_SIZE
+#  define BUFFER_SIZE 42
+# endif
+
+int		ft_strlen(const char *str);
+char	*get_next_line(int fd);
+void	clear_buffer(char *buf, int start);
+char	*str_add_buffer(char *old_str, char *buf, int buf_len);
+#endif // GET_NEXT_LINE_H
diff --git a/get_next_line_utils.c b/get_next_line_utils.c
new file mode 100644
index 0000000..61171be
--- /dev/null
+++ b/get_next_line_utils.c
@@ -0,0 +1,60 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line_utils.c                              :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/15 14:14:59 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/03/26 10:49:08 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+
+int	ft_strlen(const char *str)
+{
+	int	len;
+
+	if (!str)
+		return (0);
+	len = 0;
+	while (str[len])
+		len++;
+	return (len);
+}
+
+void	clear_buffer(char *buf, int start)
+{
+	while (start < BUFFER_SIZE)
+		buf[start++] = '\0';
+}
+
+char	*str_add_buffer(char *old_str, char *buf, int buf_len)
+{
+	char	*result;
+	int		len;
+	int		i;
+
+	if (!old_str)
+		len = buf_len;
+	else
+		len = ft_strlen(old_str) + buf_len;
+	result = malloc(sizeof(char) * (len + 1));
+	if (!result)
+	{
+		free(old_str);
+		return (NULL);
+	}
+	result[len] = '\0';
+	i = 0;
+	while (old_str && old_str[i])
+	{
+		result[i] = old_str[i];
+		i++;
+	}
+	while (i < len)
+		result[i++] = *(buf++);
+	free(old_str);
+	return (result);
+}
diff --git a/libft.h b/libft.h
index 0e35f35..e0c1691 100644
--- a/libft.h
+++ b/libft.h
@@ -6,7 +6,7 @@
 /*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/03/10 16:37:54 by dkaiser           #+#    #+#             */
-/*   Updated: 2024/04/12 16:44:02 by dkaiser          ###   ########.fr       */
+/*   Updated: 2024/04/12 16:50:28 by dkaiser          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,6 +14,7 @@
 # define LIBFT_H
 
 # include "ft_printf.h"
+# include "get_next_line.h"
 # include <stdlib.h>
 # include <string.h>
 # include <unistd.h>