Merge remote-tracking branch 'origin/minishell'

1 files changed, 41 insertions, 0 deletions

diff --git a/src/str/ft_strsub.c b/src/str/ft_strsub.c
new file mode 100644
index 0000000..c7121bd
--- /dev/null
+++ b/src/str/ft_strsub.c
@@ -0,0 +1,41 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strsub.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/10/17 08:28:49 by cacharle          #+#    #+#             */
+/*   Updated: 2020/05/09 12:30:39 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_str.h"
+
+/*
+** \brief      Extract a substring from a string
+** \param s    String to extract from
+** \param start  Starting index of the substring
+** \param len    Substring length
+** \return       The created substring or NULL on error
+*/
+
+char	*ft_strsub(char const *s, size_t start, size_t len)
+{
+	char	*sub;
+	size_t	s_len;
+
+	if (s == NULL)
+		return (NULL);
+	s_len = ft_strlen(s);
+	if (start > s_len)
+		return (NULL);
+	if (start + len > s_len)
+		len = s_len - start;
+	if ((sub = (char*)malloc(sizeof(char) * (len + 1))) == NULL)
+		return (NULL);
+	sub[len] = '\0';
+	if (start > ft_strlen(s))
+		return (sub);
+	return (ft_strncpy(sub, s + start, len));
+}