#include "ast_neg.h"

#include <stdlib.h>

bool ast_is_neg(struct ast *node)
{
    return node != NULL && node->type == AST_NEG;
}

struct ast_neg *ast_get_neg(struct ast *node)
{
    if (ast_is_neg(node))
        return node->data;
    return NULL;
}

struct ast *ast_create_neg(bool negation, struct ast *child)
{
    struct ast_neg *node = malloc(sizeof(struct ast_neg));
    if (!node)
        return NULL;

    node->negation = negation;
    node->child = child;
    return ast_create(AST_NEG, node);
}

void ast_free_neg(struct ast_neg *node)
{
    if (!node)
        return;
    ast_free(&node->child);
    free(node);
}