forked from zhurui/management
303 lines
8.2 KiB
JavaScript
303 lines
8.2 KiB
JavaScript
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
|
|
|
|
import * as leb from "@webassemblyjs/leb128";
|
|
import * as ieee754 from "@webassemblyjs/ieee754";
|
|
import * as utf8 from "@webassemblyjs/utf8";
|
|
import constants from "@webassemblyjs/helper-wasm-bytecode";
|
|
import { encodeNode } from "../index";
|
|
|
|
function assertNotIdentifierNode(n) {
|
|
if (n.type === "Identifier") {
|
|
throw new Error("Unsupported node Identifier");
|
|
}
|
|
}
|
|
|
|
export function encodeVersion(v) {
|
|
var bytes = constants.moduleVersion;
|
|
bytes[0] = v;
|
|
return bytes;
|
|
}
|
|
export function encodeHeader() {
|
|
return constants.magicModuleHeader;
|
|
}
|
|
export function encodeU32(v) {
|
|
var uint8view = new Uint8Array(leb.encodeU32(v));
|
|
|
|
var array = _toConsumableArray(uint8view);
|
|
|
|
return array;
|
|
}
|
|
export function encodeI32(v) {
|
|
var uint8view = new Uint8Array(leb.encodeI32(v));
|
|
|
|
var array = _toConsumableArray(uint8view);
|
|
|
|
return array;
|
|
}
|
|
export function encodeI64(v) {
|
|
var uint8view = new Uint8Array(leb.encodeI64(v));
|
|
|
|
var array = _toConsumableArray(uint8view);
|
|
|
|
return array;
|
|
}
|
|
export function encodeVec(elements) {
|
|
var size = encodeU32(elements.length);
|
|
return _toConsumableArray(size).concat(_toConsumableArray(elements));
|
|
}
|
|
export function encodeValtype(v) {
|
|
var byte = constants.valtypesByString[v];
|
|
|
|
if (typeof byte === "undefined") {
|
|
throw new Error("Unknown valtype: " + v);
|
|
}
|
|
|
|
return parseInt(byte, 10);
|
|
}
|
|
export function encodeMutability(v) {
|
|
var byte = constants.globalTypesByString[v];
|
|
|
|
if (typeof byte === "undefined") {
|
|
throw new Error("Unknown mutability: " + v);
|
|
}
|
|
|
|
return parseInt(byte, 10);
|
|
}
|
|
export function encodeUTF8Vec(str) {
|
|
return encodeVec(utf8.encode(str));
|
|
}
|
|
export function encodeLimits(n) {
|
|
var out = [];
|
|
|
|
if (typeof n.max === "number") {
|
|
out.push(0x01);
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.min))); // $FlowIgnore: ensured by the typeof
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.max)));
|
|
} else {
|
|
out.push(0x00);
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.min)));
|
|
}
|
|
|
|
return out;
|
|
}
|
|
export function encodeModuleImport(n) {
|
|
var out = [];
|
|
out.push.apply(out, _toConsumableArray(encodeUTF8Vec(n.module)));
|
|
out.push.apply(out, _toConsumableArray(encodeUTF8Vec(n.name)));
|
|
|
|
switch (n.descr.type) {
|
|
case "GlobalType":
|
|
{
|
|
out.push(0x03); // $FlowIgnore: GlobalType ensure that these props exists
|
|
|
|
out.push(encodeValtype(n.descr.valtype)); // $FlowIgnore: GlobalType ensure that these props exists
|
|
|
|
out.push(encodeMutability(n.descr.mutability));
|
|
break;
|
|
}
|
|
|
|
case "Memory":
|
|
{
|
|
out.push(0x02); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeLimits(n.descr.limits)));
|
|
break;
|
|
}
|
|
|
|
case "Table":
|
|
{
|
|
out.push(0x01);
|
|
out.push(0x70); // element type
|
|
// $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeLimits(n.descr.limits)));
|
|
break;
|
|
}
|
|
|
|
case "FuncImportDescr":
|
|
{
|
|
out.push(0x00); // $FlowIgnore
|
|
|
|
assertNotIdentifierNode(n.descr.id); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.descr.id.value)));
|
|
break;
|
|
}
|
|
|
|
default:
|
|
throw new Error("Unsupport operation: encode module import of type: " + n.descr.type);
|
|
}
|
|
|
|
return out;
|
|
}
|
|
export function encodeSectionMetadata(n) {
|
|
var out = [];
|
|
var sectionId = constants.sections[n.section];
|
|
|
|
if (typeof sectionId === "undefined") {
|
|
throw new Error("Unknown section: " + n.section);
|
|
}
|
|
|
|
if (n.section === "start") {
|
|
/**
|
|
* This is not implemented yet because it's a special case which
|
|
* doesn't have a vector in its section.
|
|
*/
|
|
throw new Error("Unsupported section encoding of type start");
|
|
}
|
|
|
|
out.push(sectionId);
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.size.value)));
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.vectorOfSize.value)));
|
|
return out;
|
|
}
|
|
export function encodeCallInstruction(n) {
|
|
var out = [];
|
|
assertNotIdentifierNode(n.index);
|
|
out.push(0x10); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.index.value)));
|
|
return out;
|
|
}
|
|
export function encodeCallIndirectInstruction(n) {
|
|
var out = []; // $FlowIgnore
|
|
|
|
assertNotIdentifierNode(n.index);
|
|
out.push(0x11); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.index.value))); // add a reserved byte
|
|
|
|
out.push(0x00);
|
|
return out;
|
|
}
|
|
export function encodeModuleExport(n) {
|
|
var out = [];
|
|
assertNotIdentifierNode(n.descr.id);
|
|
var exportTypeByteString = constants.exportTypesByName[n.descr.exportType];
|
|
|
|
if (typeof exportTypeByteString === "undefined") {
|
|
throw new Error("Unknown export of type: " + n.descr.exportType);
|
|
}
|
|
|
|
var exportTypeByte = parseInt(exportTypeByteString, 10);
|
|
out.push.apply(out, _toConsumableArray(encodeUTF8Vec(n.name)));
|
|
out.push(exportTypeByte); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.descr.id.value)));
|
|
return out;
|
|
}
|
|
export function encodeTypeInstruction(n) {
|
|
var out = [0x60];
|
|
var params = n.functype.params.map(function (x) {
|
|
return x.valtype;
|
|
}).map(encodeValtype);
|
|
var results = n.functype.results.map(encodeValtype);
|
|
out.push.apply(out, _toConsumableArray(encodeVec(params)));
|
|
out.push.apply(out, _toConsumableArray(encodeVec(results)));
|
|
return out;
|
|
}
|
|
export function encodeInstr(n) {
|
|
var out = [];
|
|
var instructionName = n.id;
|
|
|
|
if (typeof n.object === "string") {
|
|
instructionName = "".concat(n.object, ".").concat(String(n.id));
|
|
}
|
|
|
|
var byteString = constants.symbolsByName[instructionName];
|
|
|
|
if (typeof byteString === "undefined") {
|
|
throw new Error("encodeInstr: unknown instruction " + JSON.stringify(instructionName));
|
|
}
|
|
|
|
var byte = parseInt(byteString, 10);
|
|
out.push(byte);
|
|
|
|
if (n.args) {
|
|
n.args.forEach(function (arg) {
|
|
var encoder = encodeU32; // find correct encoder
|
|
|
|
if (n.object === "i32") {
|
|
encoder = encodeI32;
|
|
}
|
|
|
|
if (n.object === "i64") {
|
|
encoder = encodeI64;
|
|
}
|
|
|
|
if (n.object === "f32") {
|
|
encoder = ieee754.encodeF32;
|
|
}
|
|
|
|
if (n.object === "f64") {
|
|
encoder = ieee754.encodeF64;
|
|
}
|
|
|
|
if (arg.type === "NumberLiteral" || arg.type === "FloatLiteral" || arg.type === "LongNumberLiteral") {
|
|
// $FlowIgnore
|
|
out.push.apply(out, _toConsumableArray(encoder(arg.value)));
|
|
} else {
|
|
throw new Error("Unsupported instruction argument encoding " + JSON.stringify(arg.type));
|
|
}
|
|
});
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
function encodeExpr(instrs) {
|
|
var out = [];
|
|
instrs.forEach(function (instr) {
|
|
// $FlowIgnore
|
|
var n = encodeNode(instr);
|
|
out.push.apply(out, _toConsumableArray(n));
|
|
});
|
|
out.push(0x0b); // end
|
|
|
|
return out;
|
|
}
|
|
|
|
export function encodeStringLiteral(n) {
|
|
return encodeUTF8Vec(n.value);
|
|
}
|
|
export function encodeGlobal(n) {
|
|
var out = [];
|
|
var _n$globalType = n.globalType,
|
|
valtype = _n$globalType.valtype,
|
|
mutability = _n$globalType.mutability;
|
|
out.push(encodeValtype(valtype));
|
|
out.push(encodeMutability(mutability));
|
|
out.push.apply(out, _toConsumableArray(encodeExpr(n.init)));
|
|
return out;
|
|
}
|
|
export function encodeFuncBody(n) {
|
|
var out = [];
|
|
out.push(-1); // temporary function body size
|
|
// FIXME(sven): get the func locals?
|
|
|
|
var localBytes = encodeVec([]);
|
|
out.push.apply(out, _toConsumableArray(localBytes));
|
|
var funcBodyBytes = encodeExpr(n.body);
|
|
out[0] = funcBodyBytes.length + localBytes.length;
|
|
out.push.apply(out, _toConsumableArray(funcBodyBytes));
|
|
return out;
|
|
}
|
|
export function encodeIndexInFuncSection(n) {
|
|
assertNotIdentifierNode(n.index); // $FlowIgnore
|
|
|
|
return encodeU32(n.index.value);
|
|
}
|
|
export function encodeElem(n) {
|
|
var out = [];
|
|
assertNotIdentifierNode(n.table); // $FlowIgnore
|
|
|
|
out.push.apply(out, _toConsumableArray(encodeU32(n.table.value)));
|
|
out.push.apply(out, _toConsumableArray(encodeExpr(n.offset))); // $FlowIgnore
|
|
|
|
var funcs = n.funcs.reduce(function (acc, x) {
|
|
return _toConsumableArray(acc).concat(_toConsumableArray(encodeU32(x.value)));
|
|
}, []);
|
|
out.push.apply(out, _toConsumableArray(encodeVec(funcs)));
|
|
return out;
|
|
} |