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libft/ft_strnstr.c

@@ -0,0 +1,91 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strnstr.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/14 17:50:28 by thrieg            #+#    #+#             */
+/*   Updated: 2025/02/16 19:05:13 by thrieg           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+char	*ft_strnstr(const char *big, const char *little, size_t len)
+{
+	size_t	i;
+	size_t	j;
+
+	if (*little == '\0')
+		return ((char *)big);
+	i = 0;
+	while (big[i] != '\0' && i < len)
+	{
+		j = 0;
+		while (little[j] != '\0' && big[i + j] == little[j] && (i + j) < len)
+			j++;
+		if (little[j] == '\0')
+			return ((char *)big + i);
+		i++;
+	}
+	return (NULL);
+}
+
+int	ft_strhassuffix(const char *s, const char *suffix)
+{
+	size_t				i;
+	size_t				j;
+
+	i = ft_strlen(s);
+	j = ft_strlen(suffix);
+	if (i == 0 || j == 0)
+		return (0);
+	i--;
+	j--;
+	while (i > 0 && j > 0)
+	{
+		if (s[i] != suffix[j])
+			return (0);
+		i--;
+		j--;
+	}
+	return (1);
+}
+
+/*
+ * Same as ft_strcmp() but ignores eventual `\n` in the
+ * comparison.
+ */
+int	ft_linecmp(const char *s1, const char *s2)
+{
+	size_t				i;
+	const unsigned char	*a;
+	const unsigned char	*b;
+
+	i = 0;
+	a = (const unsigned char *) s1;
+	b = (const unsigned char *) s2;
+	while (1)
+	{
+		if ((a[i] == '\n' && b[i] == '\0')
+			|| (a[i] == '\0' && b[i] == '\n'))
+			break ;
+		if (a[i] != b[i])
+			return (a[i] - b[i]);
+		if (a[i] == '\0')
+			break ;
+		i++;
+	}
+	return (0);
+}
+
+size_t	ft_linelen(const char *line)
+{
+	size_t	i;
+
+	i = 0;
+	while (line[i] != '\0' && line[i] != '\n')
+		i++;
+	return (i);
+}