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<?php
declare(strict_types=1);
namespace Nsfisis\Waddiwasi\WebAssembly\Execution;
use RuntimeException;
use function count;
final class Store
{
/**
* @param list<FuncInst> $funcs
* @param list<TableInst> $tables
* @param list<MemInst> $mems
* @param list<GlobalInst> $globals
* @param list<ElemInst> $elems
* @param list<DataInst> $datas
*/
public function __construct(
public array $funcs,
public array $tables,
public array $mems,
public array $globals,
public array $elems,
public array $datas,
) {
}
public static function empty(): self
{
return new self([], [], [], [], [], []);
}
public function register(Extern $extern): ExternVal
{
switch ($extern::class) {
case Externs\Func::class:
foreach ($this->funcs as $i => $f) {
if ($f === $extern->func) {
return ExternVal::Func($i);
}
}
$this->funcs[] = $extern->func;
return ExternVal::Func(count($this->funcs) - 1);
case Externs\Table::class:
foreach ($this->tables as $i => $t) {
if ($t === $extern->table) {
return ExternVal::Table($i);
}
}
$this->tables[] = $extern->table;
return ExternVal::Table(count($this->tables) - 1);
case Externs\Mem::class:
foreach ($this->mems as $i => $m) {
if ($m === $extern->mem) {
return ExternVal::Mem($i);
}
}
$this->mems[] = $extern->mem;
return ExternVal::Mem(count($this->mems) - 1);
case Externs\Global_::class:
foreach ($this->globals as $i => $g) {
if ($g === $extern->global) {
return ExternVal::Global_($i);
}
}
$this->globals[] = $extern->global;
return ExternVal::Global_(count($this->globals) - 1);
default:
throw new RuntimeException("unreachable");
}
}
}
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