/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2025  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <nanowasm/nw.h>
#include <nw/interp.h>
#include <nw/log.h>
#include <nw/ops.h>

static enum nw_state tell(struct nw_interp *const i)
{
    struct nw_i_sm_unreachable *const u = &i->sm.unreachable;
    const struct nw_io_cfg *const cfg = &i->cfg.io;
    static const char *const exc = "unreachable";
    const enum nw_state n = cfg->tell(&u->offset, cfg->user);

    if (n)
        return n;

    i->exception = exc;
#ifdef NW_LOG
    nwp_log("%s, offset: %ld\n", exc, u->offset);
#endif
    return NW_FATAL;
}

void nwp_op_unreachable(struct nw_interp *const i)
{
    static const struct nw_i_sm_unreachable u;

    i->sm.unreachable = u;
    i->next = tell;
}