/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_vector.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/21 17:45:12 by thrieg            #+#    #+#             */
/*   Updated: 2025/02/16 19:05:42 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_vector.h"
#include "libft.h"

//creates a vector of initial size size
//returns its address, or NULL if any allocations fails
t_vector	*ft_create_vector(size_t size)
{
	t_vector	*ret;

	ret = malloc(sizeof(t_vector));
	if (!ret)
		return (NULL);
	ret->buffer = malloc(sizeof(char) * size);
	if (!ret->buffer)
	{
		free(ret);
		return (NULL);
	}
	ret->index = 0;
	ret->size = size;
	ret->finished = 0;
	return (ret);
}

//append c to the vector dest
//returns NULL if the allocation fail and the adress of dest if all goes well
t_vector	*ft_vector_pushback(t_vector *dest, char c)
{
	char	*buff;

	if (dest->index >= dest->size)
	{
		buff = malloc(sizeof(char) * ((dest->size + 1) * 2));
		if (!buff)
			return (NULL);
		ft_memcpy(buff, dest->buffer, dest->index);
		dest->size = (dest->size + 1) * 2;
		free(dest->buffer);
		dest->buffer = buff;
	}
	dest->buffer[dest->index] = c;
	dest->index++;
	return (dest);
}

//append size bytes at src to the vector dest
//returns NULL if the allocation fail and the adress of dest if all goes well
//returns NULL if dest or src is NULL without doing anything
t_vector	*ft_vector_concat(t_vector *dest, const void *src, size_t size)
{
	char	*buff;

	if (!dest || !src)
		return (NULL);
	if ((dest->index + size) >= dest->size)
	{
		buff = malloc(sizeof(char) * ((dest->size + size) * 2));
		if (!buff)
			return (NULL);
		ft_memcpy(buff, dest->buffer, dest->index);
		dest->size = (dest->size + size) * 2;
		free(dest->buffer);
		dest->buffer = buff;
	}
	ft_memcpy(dest->buffer + dest->index, src, size);
	dest->index += size;
	return (dest);
}

//duplicates the content of a vector into an appropriately sized string
//returns NULL if allocation fails or if vec or vec->buffer is NULL
char	*ft_vtoc(t_vector *vec)
{
	char	*ret;

	if (!vec)
		return (NULL);
	if (!vec->buffer)
		return (NULL);
	ret = malloc(sizeof(char) * (vec->index + 1));
	if (!ret)
		return (NULL);
	ft_memcpy(ret, vec->buffer, vec->index);
	ret[vec->index] = '\0';
	return (ret);
}

//frees vec and all its members, sets vec to NULL and returns NULL
void	ft_free_vector(t_vector **vec)
{
	if (!vec)
		return ;
	if (!(*vec))
		return ;
	if ((*vec)->buffer)
		free((*vec)->buffer);
	free(*vec);
	*vec = NULL;
}