42sh/src/utils/ast/ast_neg.c

#include "ast_neg.h"

#include <stdio.h>
#include <stdlib.h>

struct ast_neg *ast_get_neg(struct ast *node)
{
    if (node == NULL || node->type != AST_NEG)
        return NULL;
    return node->data;
}

struct ast *ast_create_neg(bool negation, struct ast *child)
{
    struct ast_neg *neg_data = malloc(sizeof(struct ast_neg));
    if (neg_data == NULL)
    {
        perror("Error: could not allocate more memory");
        return NULL;
    }

    neg_data->negation = negation;
    neg_data->child = child;
    struct ast *result = ast_create(AST_NEG, neg_data);
    if (result == NULL)
        free(neg_data);

    return result;
}

void ast_free_neg(struct ast_neg *node)
{
    if (node == NULL)
        return;

    ast_free(&node->child);
    free(node);
}