src/routines/section/skip.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/io.h>
#include <nw/log.h>
#include <nw/routines.h>

static enum nw_state skip(struct nw_mod *const m)
{
    const struct nw_mod_section *const s = &m->section;
    const struct nw_io_cfg *const cfg = &m->cfg.io;
    const long offset = s->cur + s->len;
    const enum nw_state n = cfg->seek(offset, cfg->user);

    if (n)
        return n;

    nwp_section(m);
    return NW_AGAIN;
}

static enum nw_state tell(struct nw_mod *const m)
{
    struct nw_mod_section *const s = &m->section;
    const struct nw_io_cfg *const cfg = &m->cfg.io;
    const enum nw_state n = cfg->tell(&s->cur, cfg->user);

    if (n)
        return n;

    m->next = skip;
    return NW_AGAIN;
}

void nwp_section_skip(struct nw_mod *const m)
{
    m->next = tell;
}