src/routines/section/exit.c


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/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2024  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>

enum nw_state nwp_section_exit(struct nw_mod *const m)
{
    long offset;
    const struct nw_io_cfg *const cfg = &m->cfg.io;
    const enum nw_state n = cfg->tell(&offset, cfg->user);

    if (n)
        return n;

    const struct nw_mod_section *const s = &m->section;
    const unsigned long size = offset - s->offset;

    if (size != s->len)
    {
        LOG("%s: size exceeded (%lu expected, got %lu)\n",
            __func__, (unsigned long)s->len, size);
        return NW_FATAL;
    }

    nwp_section(m);
    return NW_AGAIN;
}