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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 <nanowasm/types.h>
#include <nw/inst.h>
#include <nw/interp.h>
#include <nw/log.h>
#include <nw/routines.h>
#include <stddef.h>
static enum nw_state push(struct nw_interp *const i)
{
const struct nw_i_sm_exp *const e = &i->sm.export;
if (e->kind != NW_KIND_FUNCTION)
{
static const char *const exc = "unexpected import kind";
i->exception = exc;
#ifdef NW_LOG
nwp_log("%s: %d\n", exc, e->kind);
#endif
return NW_FATAL;
}
nwp_call(i, e->index);
return NW_AGAIN;
}
static enum nw_state find_start(struct nw_inst *const inst)
{
struct nw_interp *const i = &inst->interp;
struct nw_interp_cfg cfg;
cfg = i->cfg;
if (nwp_interp_start(i, &cfg, NULL))
{
#ifdef NW_LOG
nwp_log("nwp_interp_start failed\n");
#endif
return NW_FATAL;
}
nwp_find_export(i, inst->entry, push);
inst->next = nwp_inst_run;
return NW_AGAIN;
}
static enum nw_state init_data(struct nw_inst *const i)
{
nwp_init_data(i, find_start);
return NW_AGAIN;
}
int nw_start(struct nw_inst *const i, const struct nw_inst_cfg *const icfg)
{
const struct nw_inst inst = {0};
*i = inst;
i->entry = icfg->entry;
if (nwp_interp_start(&i->interp, &icfg->interp_cfg,
&nwp_interp_initexpr_set))
{
#ifdef NW_LOG
nwp_log("nwp_interp_start failed\n");
#endif
return -1;
}
nwp_init_globals(i, init_data);
return 0;
}
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