get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: psevilla <psevilla@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/02/24 18:46:04 by gmacias-          #+#    #+#             */
/*   Updated: 2024/11/21 20:27:25 by psevilla         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"
#include <stdio.h>
#include <stdlib.h>

int	ft_strlen(char *s)
{
	int	i;

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

char	*ft_strchr(const char *s, int c)
{
	while (*s)
	{
		if (*s == c)
			return ((char *)s);
		s++;
	}
	if (c == '\0')
		return ((char *)s);
	return (NULL);
}

char	*ft_strdup(char *s)
{
	char	*str;
	int		i;

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

char	*ft_strjoin(char *s1, char *s2)
{
	char	*s;
	int		i;

	s = malloc(ft_strlen(s1) + ft_strlen(s2) + 1);
	if (!s)
		return (NULL);
	i = 0;
	while (*s1)
		s[i++] = *s1++;
	while (*s2)
		s[i++] = *s2++;
	s[i] = '\0';
	return (s);
}

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

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