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

#include "utils/ast/ast_redir.h"

#include <stdlib.h>

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

struct ast_redir *ast_get_redir(struct ast *node)
{
    if (ast_is_redir(node))
        return (struct ast_redir *)node->data;
    return NULL;
}

struct ast *ast_create_redir(struct ast *child, char *filename, int io_number,
                             enum ast_redir_type type)
{
    struct ast_redir *redir = malloc(sizeof(struct ast_redir));
    if (!redir)
        return NULL;
    redir->child = child;
    redir->filename =
        filename; // Takes ownership? Usually yes in simple ASTs, or dup. Let's
                  // assume pointer copy for now, but user must manage memory.
    redir->io_number = io_number;
    redir->type = type;

    return ast_create(AST_REDIR, redir);
}

void ast_free_redir(struct ast_redir *redir)
{
    if (!redir)
        return;
    ast_free(&redir->child);
    free(redir->filename);
    free(redir);
}