get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: pveiga-c <pveiga-c@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/05/18 18:13:05 by pveiga-c          #+#    #+#             */
/*   Updated: 2023/05/24 17:48:10 by pveiga-c         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

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

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

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

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

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

	i = 0;
	if (!s)
		return (NULL);
	while (s[i] != '\0')
	{
		if (s[i] == (char)c)
			return ((char *)(s + i));
		i++;
	}
	if (s[i] == (char)c)
		return ((char *)(s + i));
	return (NULL);
}

void	*ft_memmove(void *dst, const void *src, size_t len)
{
	int	i;

	if (!dst && !src)
		return (NULL);
	if (dst > src)
	{
		i = len - 1;
		while (i >= 0)
		{
			*(char *)(dst + i) = *(char *)(src + i);
			i--;
		}
	}
	else
	{
		i = 0;
		while (i < (int)len)
		{
			*(char *)(dst + i) = *(char *)(src + i);
			i++;
		}
	}
	return (dst);
}