First commitHEADmain

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/ft_strnstr.c b/lib/ft_strnstr.c
new file mode 100644
index 0000000..819ea86
--- /dev/null
+++ b/lib/ft_strnstr.c
@@ -0,0 +1,41 @@
+/*
+Libft Copyright (C) 2026 yctct
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include "libft.h"
+
+char	*ft_strnstr(const char *big, const char *little, size_t len)
+{
+	unsigned long	i;
+	int				j;
+
+	if (ft_strlen(little) <= 0)
+		return ((char *)(big));
+	i = 0;
+	while (big[i] != '\0' && i < len)
+	{
+		if (big[i] == little[0])
+		{
+			j = 0;
+			while (big[i + j] == little[j] && little[j] && (i + j) < len)
+				j++;
+			if (little[j] == '\0')
+				return ((char *)(&big[i]));
+		}
+		i++;
+	}
+	return (NULL);
+}