/*
 * 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 <nanowasm/linear.h>
#include <nw/linear.h>
#include <nw/interp.h>
#include <nw/mem.h>
#include <nw/log.h>

enum nw_state nwp_linear_load(struct nw_interp *const i,
    struct nw_sm_io *const io, const unsigned long offset)
{
    const struct nw_interp_cfg *const cfg = &i->cfg;
    enum nw_state n;

    if (nwp_linear_check(i, offset, io->n))
    {
        static const char *const exc = "out-of-bounds read access to "
            "linear memory";

#ifdef NW_LOG
        nwp_log("%s, addr=%#lx, sz=%#lx\n", exc, offset, io->n);
#endif
        i->exception = exc;
        return NW_FATAL;
    }

    n = nwp_mem_load(&cfg->linear, io, offset, cfg->user);

    if (n == NW_FATAL)
    {
        static const char *const exc = "failed to load from linear memory";

#ifdef NW_LOG
        nwp_log("%s\n", exc);
#endif
        i->exception = exc;
    }

    return n;
}

enum nw_state nw_linear_load(struct nw_inst *const i,
    struct nw_sm_io *const io, const unsigned long offset)
{
    return nwp_linear_load(&i->interp, io, offset);
}