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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>
#include <string.h>
static enum nw_state run(struct nw_mod *const m)
{
static const unsigned char version[] = {1, 0, 0, 0};
struct nw_sm_cv *const cv = &m->sm.check_version;
const struct nw_io_cfg *const cfg = &m->cfg.io;
const enum nw_state n = nwp_io_read(cfg, &cv->io, cfg->user);
if (n)
return n;
if (memcmp(&cv->version, version, sizeof cv->version))
{
#ifdef NW_LOG
nwp_log("wrong version bytes\n");
#endif
return NW_FATAL;
}
nwp_section(m);
return NW_AGAIN;
}
void nwp_check_version(struct nw_mod *const m)
{
const struct nw_sm_cv cv = {0};
struct nw_sm_cv *const pcv = &m->sm.check_version;
struct nw_sm_io *const io = &pcv->io;
*pcv = cv;
io->buf = &pcv->version;
io->n = sizeof pcv->version;
m->next = run;
}
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