get_next_line/get_next_line_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   get_next_line_utils.c                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/01 12:31:58 by kcolin            #+#    #+#             */
/*   Updated: 2024/11/01 12:37:32 by kcolin           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

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

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

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

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

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

size_t	ft_strlcpy(char *dst, const char *src, size_t size)
{
	size_t	i;

	i = 0;
	while (src[i] != 0)
	{
		if (i < size)
			dst[i] = src[i];
		i++;
	}
	if (size > 0)
	{
		if (size - 1 > i)
			dst[i] = '\0';
		else
			dst[size - 1] = '\0';
	}
	return (i);
}

size_t	ft_strlcat(char *dst, const char *src, size_t size)
{
	size_t	dst_len;
	size_t	src_len;
	size_t	i;

	dst_len = 0;
	while (dst[dst_len] != '\0')
		dst_len++;
	src_len = 0;
	while (src[src_len] != '\0')
		src_len++;
	if (size <= dst_len)
		return (size + src_len);
	i = 0;
	while (src[i] != '\0' && i < size - dst_len - 1)
	{
		dst[dst_len + i] = src[i];
		i++;
	}
	dst[dst_len + i] = '\0';
	return (dst_len + src_len);
}

char	*ft_strjoin_and_free_originals(char const *s1, char const *s2)
{
	char	*out;
	size_t	len;

	len = ft_strlen(s1) + ft_strlen(s2) + 1;
	out = malloc(len);
	if (out == NULL)
	{
		free((void *)s1);
		free((void *)s2);
		return (NULL);
	}
	ft_strlcpy(out, s1, len);
	ft_strlcat(out, s2, len);
	free((void *)s1);
	return (out);
}