get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mohaben- <mohaben-@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/09 13:42:55 by mohaben-          #+#    #+#             */
/*   Updated: 2025/01/17 11:59:55 by mohaben-         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "fdf.h"

char	*ft_strdup(char *s)
{
	char	*dup;
	size_t	i;

	if (s == NULL)
		return (NULL);
	dup = (char *)malloc((ft_strlen(s) + 1) * sizeof(char));
	if (dup == NULL)
		return (NULL);
	i = 0;
	while (s[i] != '\0')
	{
		dup[i] = s[i];
		i++;
	}
	dup[i] = '\0';
	return (dup);
}

char	*ft_substr(char *s, unsigned int start, size_t len)
{
	char	*sub;
	size_t	size;
	size_t	i;

	if (s == NULL)
		return (NULL);
	if (start >= ft_strlen(s))
		return (ft_strdup(""));
	size = ft_strlen(s + start);
	if (size > len)
		size = len;
	sub = (char *)malloc((size + 1) * sizeof(char));
	if (sub == NULL)
		return (NULL);
	i = 0;
	while (i < size)
	{
		sub[i] = s[start + i];
		i++;
	}
	sub[i] = '\0';
	return (sub);
}

char	*ft_strjoin(char *s1, char *s2)
{
	char	*join;
	size_t	i;
	size_t	j;

	if (s1 == NULL && s2 == NULL)
		return (NULL);
	if (s1 == NULL && s2 != NULL)
		return (ft_strdup(s2));
	if (s1 != NULL && s2 == NULL)
		return (ft_strdup(s1));
	join = malloc((ft_strlen(s1) + ft_strlen(s2) + 1) * sizeof(char));
	if (join == NULL)
		return (NULL);
	i = 0;
	j = 0;
	while (s1[j])
		join[i++] = s1[j++];
	j = 0;
	while (s2[j])
		join[i++] = s2[j++];
	join[i] = '\0';
	return (join);
}

char	*ft_strchr(char *s, int c)
{
	if (s == NULL)
		return (NULL);
	while (*s)
	{
		if (*s == (char)c)
			return ((char *)s);
		s++;
	}
	if (*s == (char)c)
		return ((char *)s);
	return (NULL);
}