src/op/tee_local.c


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/*
 * 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>
#include <nw/routines.h>
#include <nw/stack.h>

static enum nw_state push(struct nw_interp *const i)
{
    struct nw_i_sm_tee_local *const t = &i->sm.tee_local;
    const enum nw_state n = nwp_stack_push(i, &t->io);

    if (n)
        return n;

    nwp_interp_resume(i);
    return NW_AGAIN;
}

static enum nw_state prepare(struct nw_interp *const i)
{
    struct nw_i_sm_tee_local *const t = &i->sm.tee_local;
    struct nw_i_sm_set_local_out o;
    size_t sz;

    o = i->sm.set_local.out;

    if (nwp_type_sz(o.type, &sz))
    {
        static const char *const exc = "invalid local type";

        i->exception = exc;
#ifdef NW_LOG
        nwp_log("%s: %#x\n", exc, (unsigned)o.type);
#endif
        return NW_FATAL;
    }
    else
    {
        struct nw_i_sm_tee_local tl = {{0}};

        tl.in = o;
        tl.io.buf = &t->in.value;
        tl.io.n = sz;
        *t = tl;
        i->next = push;
    }

    return NW_AGAIN;
}

void nwp_op_tee_local(struct nw_interp *const i)
{
    nwp_set_local(i, prepare);
}