minilib.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   minilib.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: nenvoy <nenvoy@student.21-school.ru>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/26 15:37:44 by nenvoy            #+#    #+#             */
/*   Updated: 2021/11/26 15:37:44 by nenvoy           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "pipex.h"

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

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

void	ft_putstr_fd(char *s, int fd)
{
	size_t	i;

	i = 0;
	if (s)
	{
		while (s[i] != '\0')
		{
			write (fd, &s[i], 1);
			i++;
		}
	}
}

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

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

int	ft_strncmp(const char *s1, const char *s2, size_t n)
{
	size_t	i;

	i = 0;
	if (n == 0)
		return (0);
	while (s1[i] != '\0' && s1[i] == s2[i] && i < (n - 1))
		i++;
	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

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

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