ft_memchr: initial implementation

Makefile

@@ -6,7 +6,7 @@
 #    By: kcolin <marvin@42.fr>                      +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2024/10/14 13:43:59 by kcolin            #+#    #+#              #
-#    Updated: 2024/10/16 13:22:00 by kcolin           ###   ########.fr        #
+#    Updated: 2024/10/16 13:50:09 by kcolin           ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -28,7 +28,8 @@ SOURCES = ft_isalpha.c \
 	ft_tolower.c \
 	ft_strchr.c \
 	ft_strrchr.c \
-	ft_strncmp.c
+	ft_strncmp.c \
+	ft_memchr.c
 OBJECTS = $(SOURCES:.c=.o)
 CC = gcc
 

ft_memchr.c

@@ -0,0 +1,54 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_memchr.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/16 14:01:28 by kcolin            #+#    #+#             */
+/*   Updated: 2024/10/16 14:05:38 by kcolin           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+void	*ft_memchr(const void *s, int c, t_size n)
+{
+	t_size	i;
+
+	i = 0;
+	while (i < n)
+	{
+		if (((const unsigned char *)s)[i] == (unsigned char)c)
+			return ((void *)s + i);
+		i++;
+	}
+	return (0);
+}
+
+/*
+#include <stdio.h>
+#include <string.h>
+
+int	main(int argc, char **argv)
+{
+	char	*result;
+	t_size	cmp_len;
+
+	cmp_len = 5;
+	if (argc > 2)
+	{
+		result = ft_memchr(argv[1], argv[2][0], cmp_len);
+		if (result == 0)
+			printf("(null)\n");
+		else
+			printf("%s\n", result);
+		result = memchr(argv[1], argv[2][0], cmp_len);
+		if (result == 0)
+			printf("(null)\n");
+		else
+			printf("%s\n", result);
+	}
+	return (0);
+}
+*/

libft.h

@@ -37,4 +37,6 @@ char	*ft_strchr(const char *s, int c);
 char	*ft_strrchr(const char *s, int c);
 int		ft_strncmp(const char *s1, const char *s2, t_size n);
 
+void	*ft_memchr(const void *s, int c, t_size n);
+
 #endif