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libft/ft_vecint.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   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;
+}