get_next_line_utils_bonus.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils_bonus.c                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ajaidi <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/17 18:51:53 by ajaidi            #+#    #+#             */
/*   Updated: 2021/11/22 01:52:15 by ajaidi           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

char	*ft_strdup(const char *s1)
{
	int		i;
	char	*ptr;

	i = 0;
	while (s1[i])
		i++;
	ptr = (char *)malloc(i * sizeof(char) + 1);
	if (!ptr)
		return (NULL);
	i = -1;
	while (s1[++i])
		ptr[i] = s1[i];
	ptr[i] = 0;
	return (ptr);
}

int	ft_strchr(char *s, char c)
{
	int	i;

	i = 0;
	while (s[i])
	{
		if (s[i] == c)
			return (i);
		i++;
	}
	return (-1);
}

char	*ft_substr(char const *s, unsigned int start, size_t len)
{
	char	*ptr;
	size_t	i;

	i = -1;
	if (!s)
		return (NULL);
	if (start >= ft_strlen(s))
	{
		ptr = malloc(1);
		ptr[0] = 0;
		return (ptr);
	}
	if (len > (ft_strlen(s) - start))
		ptr = (char *)malloc(ft_strlen(s) - start + 1);
	else
		ptr = (char *)malloc(len + 1);
	if (!ptr)
		return (NULL);
	while (s[start + ++i] && i < len)
		ptr[i] = s[start + i];
	ptr[i] = 0;
	return (ptr);
}

size_t	ft_strlen(const char *s)
{
	size_t	i;

	i = 0;
	while (s[i])
		i++;
	return (i);
}

char	*ft_strjoin(char const *s1, char const *s2)
{
	int		i1;
	int		i;
	char	*ptr;
	int		j;

	i = -1;
	j = -1;
	if (!s2)
		return (NULL);
	i1 = ft_strlen(s1) + ft_strlen(s2);
	ptr = (char *)malloc(i1 * sizeof(char) + 1);
	if (!ptr)
		return (NULL);
	while (s1[++i])
		ptr[i] = s1[i];
	while (s2[++j])
		ptr[i++] = s2[j];
	ptr[i] = 0;
	return (ptr);
}