get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   get_next_line_utils.c                              :+:    :+:            */
/*                                                     +:+                    */
/*   By: pavidal <pavidal@student.codam.nl>           +#+                     */
/*                                                   +#+                      */
/*   Created: 2024/12/08 01:27:37 by pavidal       #+#    #+#                 */
/*   Updated: 2024/12/21 18:19:47 by pavidal       ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

char	*ft_strdup(const char	*str)
{
	unsigned int	i;
	char			*new_str;

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

char	*ft_strchr(const char *str, int c)
{
	unsigned char	match;
	int				i;

	i = 0;
	match = (unsigned char)c;
	while (str[i] != '\0')
	{
		if (str[i] == match)
			return ((char *)&str[i]);
		i++;
	}
	if (match == '\0')
		return ((char *)&str[i]);
	return (0);
}

size_t	ft_strlen(const char *str)
{
	size_t	count;

	count = 0;
	while (str[count] != '\0')
		count++;
	return (count);
}

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

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

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

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