add gnl and strcmp to libft

libft/src/get_next_line/get_next_line.c

@@ -0,0 +1,124 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                  :::  o_   ::::::    :::   */
+/*   get_next_line.c                               :+:  /    :+::+:    :+:    */
+/*                                                +:+   >   +:++:+    +:+     */
+/*   By: whaffman <whaffman@student.codam.nl>    +#+  +:+  +#++#++:++#++      */
+/*                                              +#+ +#+#+ +#++#+    +#+ \o/   */
+/*   Created: 2024/07/15 16:59:55 by whaffman   #+#+# #+#+# #+#    #+#   |    */
+/*   Updated: 2024/07/15 17:00:24 by whaffman   ###   ###  ###    ###   / \   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include <unistd.h>
+#include <stdlib.h>
+
+static void    gnl_clean(void **ptr)
+{
+        if (*ptr)
+        {
+                free(*ptr);
+                *ptr = NULL;
+        }
+}
+
+static int     gnl_check_and_extract(char **line, char **stock)
+{
+        char    *temp1;
+        char    *temp2;
+
+        if (!stock || !*stock)
+                return (0);
+        temp1 = *stock;
+        while (temp1 && *temp1 != '\n')
+                if (!*temp1++)
+                        return (0);
+        if (temp1)
+                temp1++;
+        temp2 = ft_strdup(temp1);
+        *temp1 = '\0';
+        *line = ft_strdup(*stock);
+        free(*stock);
+        *stock = temp2;
+        if (!*line || !*stock)
+        {
+                gnl_clean((void **)line);
+                gnl_clean((void **)stock);
+                return (-1);
+        }
+        return (1);
+}
+
+static int     gnl_read(int fd, char **buffer, size_t size)
+{
+        int     bytes_read;
+
+        if (!*buffer)
+        {
+                *buffer = malloc(sizeof(char) * (BUFFER_SIZE + 1));
+                if (!*buffer)
+                        return (-1);
+        }
+        bytes_read = read(fd, *buffer, size);
+        if (bytes_read >= 0)
+                (*buffer)[bytes_read] = '\0';
+        return (bytes_read);
+}
+
+static int     gnl_read_file(int fd, char **stock, char **line)
+{
+        char    *buffer;
+        char    *temp;
+        int             bytes_read;
+
+        buffer = NULL;
+        bytes_read = gnl_read(fd, &buffer, BUFFER_SIZE);
+        while (bytes_read > 0)
+        {
+                if (!*stock)
+                        *stock = ft_strdup(buffer);
+                else
+                {
+                        temp = *stock;
+                        *stock = ft_strjoin(temp, buffer);
+                        free(temp);
+                }
+                if (gnl_check_and_extract(line, stock))
+                        break ;
+                bytes_read = gnl_read(fd, &buffer, BUFFER_SIZE);
+        }
+        free(buffer);
+        if (!*stock)
+                return (-1);
+        return (bytes_read);
+}
+
+char    *get_next_line(int fd)
+{
+        static char     *stock[OPEN_MAX];
+        char            *line;
+        int                     status;
+
+        if (fd < 0 || fd >= OPEN_MAX || BUFFER_SIZE <= 0)
+                return (NULL);
+        if (stock[fd] && gnl_check_and_extract(&line, &stock[fd]))
+                return (line);
+        status = gnl_read_file(fd, &stock[fd], &line);
+        if (status > 0)
+                return (line);
+        else if (status < 0)
+        {
+                gnl_clean((void **)&stock[fd]);
+                return (NULL);
+        }
+        if (stock[fd] && *stock[fd])
+        {
+                line = ft_strdup(stock[fd]);
+                gnl_clean((void **)&stock[fd]);
+                if (line)
+                        return (line);
+        }
+        gnl_clean((void **)&stock[fd]);
+        return (NULL);
+}

libft/src/string/ft_strcmp.c

@@ -0,0 +1,11 @@
+#include <stddef.h>
+
+int ft_strcmp(const char *s1, const char *s2)
+{
+    size_t	i;
+
+    i = 0;
+    while (s1[i] && s2[i] && s1[i] == s2[i])
+        i++;
+    return ((unsigned char)s1[i] - (unsigned char)s2[i]);
+}