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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>
static enum nw_state run(struct nw_interp *const i)
{
const struct nw_i_sm_end *const e = &i->sm.end;
struct nw_frame *const f = &i->fr;
if (i->set)
return NW_OK;
else if (f->block_i)
{
f->block_i--;
nwp_interp_resume(i);
}
else
{
const long expected = f->start + f->body_size;
if (e->offset != expected)
{
static const char *const exc = "unexpected end";
#ifdef NW_LOG
nwp_log("%s\n", exc);
#endif
i->exception = exc;
return NW_FATAL;
}
else if (f->child)
nwp_unwind(i);
}
return NW_AGAIN;
}
static enum nw_state get_offset(struct nw_interp *const i)
{
struct nw_i_sm_end *const e = &i->sm.end;
const struct nw_io_cfg *const cfg = &i->cfg.io;
const enum nw_state n = cfg->tell(&e->offset, cfg->user);
if (n)
return n;
return run(i);
}
void nwp_op_end(struct nw_interp *const i)
{
static const struct nw_i_sm_end e;
i->sm.end = e;
i->next = get_offset;
}
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