Bad mess, please ignore

get_next_line.c

@@ -0,0 +1,102 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/23 20:32:46 by kcolin            #+#    #+#             */
+/*   Updated: 2024/10/24 12:34:49 by kcolin           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+#include <stdlib.h>
+
+static char	*ft_realloc(char *ptr, size_t new_size, size_t old_size)
+{
+	char	*outptr;
+	size_t	i;
+
+	outptr = malloc(new_size);
+	if (outptr != NULL)
+	{
+		i = 0;
+		while (i < old_size)
+		{
+			outptr[i] = ptr[i];
+			i++;
+		}
+	}
+	free(ptr);
+	return (outptr);
+}
+
+static char	*ft_strchr(const char *s, int c)
+{
+	int	i;
+
+	i = 0;
+	while (s[i] != '\0')
+	{
+		if (s[i] == (char)c)
+			return ((char *)s + i);
+		i++;
+	}
+	if ((char)c == '\0')
+		return ((char *)s + i);
+	return (0);
+}
+
+char	*get_next_line(int fd)
+{
+	static char		*buffer = NULL;
+	static size_t	buf_size = BUFFER_SIZE;
+	static size_t	length = 0;
+	int				num_bytes_read;
+	char			*newline_addr;
+	char			*out;
+	long			i;
+
+	if (buffer == NULL)
+	{
+		buffer = malloc(BUFFER_SIZE * sizeof(char));
+		buf_size = BUFFER_SIZE;
+		length = 0;
+	}
+	if (buffer == NULL)
+		return (NULL);
+	num_bytes_read = 1;
+	while (num_bytes_read != 0)
+	{
+		if (length == buf_size)
+		{
+			buffer = ft_realloc(buffer, sizeof(char) * buf_size * 1.5, buf_size);
+			if (buffer == NULL)
+				return (NULL);
+			buf_size *= 1.5;
+		}
+		num_bytes_read = read(fd, buffer + length, buf_size - length);
+		if (num_bytes_read < 0)
+		{
+			free(buffer);
+			buffer = NULL;
+			return (NULL);
+		}
+		length += num_bytes_read;
+		newline_addr = ft_strchr(buffer, '\n');
+		if (newline_addr != NULL)
+		{
+			out = malloc((newline_addr - buffer + 1) * sizeof(char));
+			out[(newline_addr - buffer)] = '\0';
+			i = 0;
+			while (i < (newline_addr - buffer))
+			{
+				out[i] = buffer[i];
+				i++;
+			}
+			return (out);
+		}
+	}
+	return (buffer);
+}