From f7ce583baeafd7059c53a423b4162cba364cf5ec Mon Sep 17 00:00:00 2001
From: lalgarra <lalgarra@student.42madrid.com>
Date: Mon, 6 Oct 2025 18:53:47 +0200
Subject: [PATCH] ft_strncmp()

---
 Makefile                   |  4 +-
 ft_strncmp_expected.output |  4 ++
 ft_strncmp_test.c          | 95 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 2 deletions(-)
 create mode 100644 ft_strncmp_expected.output
 create mode 100644 ft_strncmp_test.c

diff --git a/Makefile b/Makefile
index 828840e..5d30317 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: lalgarra <lalgarra@student.42madrid.com>   +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2025/10/03 18:03:12 by lalgarra          #+#    #+#              #
-#    Updated: 2025/10/06 18:17:51 by lalgarra         ###   ########.fr        #
+#    Updated: 2025/10/06 18:50:13 by lalgarra         ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -21,7 +21,7 @@ TESTS := ft_isalpha_test ft_isdigit_test ft_isalnum_test ft_isascii_test \
 	ft_isprint_test ft_toupper_test ft_tolower_test ft_strlen_test \
 	ft_memset_test ft_bzero_test ft_memcpy_test ft_calloc_test \
 	ft_memmove_test ft_strlcpy_test ft_strlcat_test ft_strchr_test \
-	ft_strrchr_test
+	ft_strrchr_test ft_strncmp_test
 
 %_test : %_test.c
 	$(CC) $(CFLAGS) $*_test.c -L$(LIBDIR) -lft -o $*_test
diff --git a/ft_strncmp_expected.output b/ft_strncmp_expected.output
new file mode 100644
index 0000000..690b690
--- /dev/null
+++ b/ft_strncmp_expected.output
@@ -0,0 +1,4 @@
+test 1: size:[10], str1:[ ips], str2:[Lorem], result:[44]
+test 2: size:[10], str1:[ ipsu], str2:[Lrem], result:[44]
+test 3: size:[5], str1:[], str2:[], result:[0]
+test 4: size:[0], str1:[], str2:[Lorem ip], result:[0]
diff --git a/ft_strncmp_test.c b/ft_strncmp_test.c
new file mode 100644
index 0000000..8d782d1
--- /dev/null
+++ b/ft_strncmp_test.c
@@ -0,0 +1,95 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strncmp_test.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: lalgarra <lalgarra@student.42madrid.com>   +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/10/05 13:21:43 by lalgarra          #+#    #+#             */
+/*   Updated: 2025/10/06 18:52:36 by lalgarra         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include <stdio.h>
+#include <string.h>
+
+static void	test(char *prefix, char str1[], char str2[], size_t size)
+{
+	int	res;
+	int	fd;
+
+	fd = STDOUT_FILENO;
+	ft_putstr_fd(prefix, fd);
+	ft_putstr_fd("size:[", fd);
+	ft_putnbr_fd((int) size, fd);
+	ft_putstr_fd("], str1:[", fd);
+	ft_putstr_fd(str1, fd);
+	ft_putstr_fd("], str2:[", fd);
+	ft_putstr_fd(str2, fd);
+	res = ft_strncmp(str2, str1, size);
+	ft_putstr_fd("], result:[", fd);
+	ft_putnbr_fd(res, fd);
+	ft_putendl_fd("]", fd);
+}
+
+static void	zero(char src[], char dest[])
+{
+	bzero(src, 128);
+	bzero(dest, 128);
+}
+
+static void	do_test1(char *prefix, char src[], char dest[])
+{
+	size_t	size;
+
+	size = 10;
+	zero(src, dest);
+	memcpy(dest, "Lorem ipsum dolor sit amet consectetur adipiscing elit.", 5);
+	memcpy(src, " ipsum dolor sit amet consectetur adipiscing elit.", 4);
+	test(prefix, src, dest, size);
+}
+
+static void	do_test2(char *prefix, char src[], char dest[])
+{
+	size_t	size;
+
+	zero(src, dest);
+	size = 10;
+	memcpy(dest, "L\x06rem ipsum dolor sit amet consectetur adipiscing elit.",
+		5);
+	memcpy(src, " ipsum dolor sit amet consectetur adipiscing elit.", 5);
+	test(prefix, src, dest, size);
+}
+
+static void	do_test3(char *prefix, char src[], char dest[])
+{
+	size_t	size;
+
+	zero(src, dest);
+	size = 5;
+	test(prefix, src, dest, size);
+}
+
+static void	do_test4(char *prefix, char src[], char dest[])
+{
+	size_t	size;
+
+	zero(src, dest);
+	size = 0;
+	memcpy(dest, "Lorem ipsum dolor sit amet consectetur adipiscing elit.",
+		8);
+	test(prefix, src, dest, size);
+}
+
+int	main(void)
+{
+	char	src[128];
+	char	dest[128];
+
+	do_test1("test 1: ", src, dest);
+	do_test2("test 2: ", src, dest);
+	do_test3("test 3: ", src, dest);
+	do_test4("test 4: ", src, dest);
+	return (0);
+}