c03 and begin c04

1 files changed, 48 insertions, 0 deletions

diff --git a/c03/ex04/ft_strstr.c b/c03/ex04/ft_strstr.c
new file mode 100644
index 0000000..e27ffc8
--- /dev/null
+++ b/c03/ex04/ft_strstr.c
@@ -0,0 +1,48 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strstr.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <charles.cabergs@gmail.com>       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/07/05 15:20:54 by cacharle          #+#    #+#             */
+/*   Updated: 2019/07/05 16:46:57 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#define MY_NULL 0x0
+
+int	ft_strlen(char *str)
+{
+	int counter;
+
+	counter = 0;
+	while (*str != '\0')
+	{
+		counter++;
+		str++;
+	}
+	return (counter);
+}
+
+char *ft_strstr(char *str, char *to_find)
+{
+	int	i;
+
+	if (!ft_strlen(to_find))
+		return str;
+	while (*str)
+	{
+		i = 0;
+		while (to_find[i] && str[i])
+		{
+			if (to_find[i] != str[i])
+				break;
+			i++;
+		}
+		if (i == ft_strlen(to_find))
+			return (str);
+		str++;
+	}
+	return (MY_NULL);
+}