1 files changed, 56 insertions, 0 deletions
diff --git a/readall.c b/readall.c
new file mode 100644
index 0000000..3dd976f
--- /dev/null
+++ b/readall.c
@@ -0,0 +1,56 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   readall.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kdx    <kdx   @student.42angouleme.fr      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/10/10 07:51:08 by kdx               #+#    #+#             */
+/*   Updated: 2022/10/10 08:07:42 by kdx              ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft/libft.h"
+#include "readall.h"
+#include <unistd.h>
+
+/* always free src */
+static char	*realloc_buf(char *src, size_t size)
+{
+	char	*cpy;
+	size_t	i;
+
+	cpy = ft_calloc((size + 1) * READALL_BSIZE, sizeof(char));
+	if (cpy == NULL)
+		return (ft_free(src));
+	i = -1;
+	while (++i < size * READALL_BSIZE)
+		cpy[i] = src[i];
+	ft_free(src);
+	return (cpy);
+}
+
+char	*readall(int fd)
+{
+	char	*buf;
+	int		read_rv;
+	size_t	read_cnt;
+
+	buf = realloc_buf(NULL, 0);
+	if (buf == NULL)
+		return (NULL);
+	read_cnt = 0;
+	read_rv = 1;
+	while (read_rv && buf != NULL)
+	{
+		read_rv = read(fd, buf + read_cnt * READALL_BSIZE, READALL_BSIZE);
+		read_cnt++;
+		if (read_rv < 0)
+			return (ft_free(buf));
+		else
+			buf = realloc_buf(buf, read_cnt);
+		if (read_rv != READALL_BSIZE)
+			return (buf);
+	}
+	return (buf);
+}