get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: doley <doley@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/17 12:31:33 by doley             #+#    #+#             */
/*   Updated: 2024/10/17 14:25:57 by doley            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "get_next_line.h"

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

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

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

	ch = (char)c;
	while (*s)
	{
		if (*s == ch)
			return ((char *)s);
		s++;
	}
	if (ch == '\0')
		return ((char *)s);
	return (NULL);
}

char	*ft_strdup(const char *s1)
{
	size_t	i;
	size_t	len;
	char	*dup;

	i = 0;
	len = ft_strlen(s1);
	dup = malloc(len + 1);
	if (!dup)
		return (NULL);
	while (s1[i])
	{
		dup[i] = s1[i];
		i++;
	}
	dup[i] = '\0';
	return (dup);
}

char	*ft_substr(char const *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);
}

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);
}