/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_vecint.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/18 11:14:16 by thrieg            #+#    #+#             */
/*   Updated: 2025/02/16 19:05:45 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_vecint.h"
#include "libft.h"

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

	ret = malloc(sizeof(t_vecint));
	if (!ret)
		return (NULL);
	ret->buffer = malloc(sizeof(int) * 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_vecint	*ft_vecint_pushback(t_vecint *dest, int c)
{
	int	*buff;

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

//append size ints (NOT 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_vecint	*ft_vecint_concat(t_vecint *dest, const void *src, size_t size)
{
	int	*buff;

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

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