diff options
Diffstat (limited to 'node_modules/@webassemblyjs/wasm-parser/lib/index.js')
| -rw-r--r-- | node_modules/@webassemblyjs/wasm-parser/lib/index.js | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/wasm-parser/lib/index.js b/node_modules/@webassemblyjs/wasm-parser/lib/index.js new file mode 100644 index 0000000..abd442a --- /dev/null +++ b/node_modules/@webassemblyjs/wasm-parser/lib/index.js @@ -0,0 +1,257 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.decode = decode; + +var decoder = _interopRequireWildcard(require("./decoder")); + +var t = _interopRequireWildcard(require("@webassemblyjs/ast")); + +function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } } + +/** + * TODO(sven): I added initial props, but we should rather fix + * https://github.com/xtuc/webassemblyjs/issues/405 + */ +var defaultDecoderOpts = { + dump: false, + ignoreCodeSection: false, + ignoreDataSection: false, + ignoreCustomNameSection: false +}; // traverses the AST, locating function name metadata, which is then +// used to update index-based identifiers with function names + +function restoreFunctionNames(ast) { + var functionNames = []; + t.traverse(ast, { + FunctionNameMetadata: function FunctionNameMetadata(_ref) { + var node = _ref.node; + functionNames.push({ + name: node.value, + index: node.index + }); + } + }); + + if (functionNames.length === 0) { + return; + } + + t.traverse(ast, { + Func: function (_Func) { + function Func(_x) { + return _Func.apply(this, arguments); + } + + Func.toString = function () { + return _Func.toString(); + }; + + return Func; + }(function (_ref2) { + var node = _ref2.node; + // $FlowIgnore + var nodeName = node.name; + var indexBasedFunctionName = nodeName.value; + var index = Number(indexBasedFunctionName.replace("func_", "")); + var functionName = functionNames.find(function (f) { + return f.index === index; + }); + + if (functionName) { + var oldValue = nodeName.value; + nodeName.value = functionName.name; + nodeName.numeric = oldValue; // $FlowIgnore + + delete nodeName.raw; + } + }), + // Also update the reference in the export + ModuleExport: function (_ModuleExport) { + function ModuleExport(_x2) { + return _ModuleExport.apply(this, arguments); + } + + ModuleExport.toString = function () { + return _ModuleExport.toString(); + }; + + return ModuleExport; + }(function (_ref3) { + var node = _ref3.node; + + if (node.descr.exportType === "Func") { + // $FlowIgnore + var nodeName = node.descr.id; + var index = nodeName.value; + var functionName = functionNames.find(function (f) { + return f.index === index; + }); + + if (functionName) { + node.descr.id = t.identifier(functionName.name); + } + } + }), + ModuleImport: function (_ModuleImport) { + function ModuleImport(_x3) { + return _ModuleImport.apply(this, arguments); + } + + ModuleImport.toString = function () { + return _ModuleImport.toString(); + }; + + return ModuleImport; + }(function (_ref4) { + var node = _ref4.node; + + if (node.descr.type === "FuncImportDescr") { + // $FlowIgnore + var indexBasedFunctionName = node.descr.id; + var index = Number(indexBasedFunctionName.replace("func_", "")); + var functionName = functionNames.find(function (f) { + return f.index === index; + }); + + if (functionName) { + // $FlowIgnore + node.descr.id = t.identifier(functionName.name); + } + } + }), + CallInstruction: function (_CallInstruction) { + function CallInstruction(_x4) { + return _CallInstruction.apply(this, arguments); + } + + CallInstruction.toString = function () { + return _CallInstruction.toString(); + }; + + return CallInstruction; + }(function (nodePath) { + var node = nodePath.node; + var index = node.index.value; + var functionName = functionNames.find(function (f) { + return f.index === index; + }); + + if (functionName) { + var oldValue = node.index; + node.index = t.identifier(functionName.name); + node.numeric = oldValue; // $FlowIgnore + + delete node.raw; + } + }) + }); +} + +function restoreLocalNames(ast) { + var localNames = []; + t.traverse(ast, { + LocalNameMetadata: function LocalNameMetadata(_ref5) { + var node = _ref5.node; + localNames.push({ + name: node.value, + localIndex: node.localIndex, + functionIndex: node.functionIndex + }); + } + }); + + if (localNames.length === 0) { + return; + } + + t.traverse(ast, { + Func: function (_Func2) { + function Func(_x5) { + return _Func2.apply(this, arguments); + } + + Func.toString = function () { + return _Func2.toString(); + }; + + return Func; + }(function (_ref6) { + var node = _ref6.node; + var signature = node.signature; + + if (signature.type !== "Signature") { + return; + } // $FlowIgnore + + + var nodeName = node.name; + var indexBasedFunctionName = nodeName.value; + var functionIndex = Number(indexBasedFunctionName.replace("func_", "")); + signature.params.forEach(function (param, paramIndex) { + var paramName = localNames.find(function (f) { + return f.localIndex === paramIndex && f.functionIndex === functionIndex; + }); + + if (paramName && paramName.name !== "") { + param.id = paramName.name; + } + }); + }) + }); +} + +function restoreModuleName(ast) { + t.traverse(ast, { + ModuleNameMetadata: function (_ModuleNameMetadata) { + function ModuleNameMetadata(_x6) { + return _ModuleNameMetadata.apply(this, arguments); + } + + ModuleNameMetadata.toString = function () { + return _ModuleNameMetadata.toString(); + }; + + return ModuleNameMetadata; + }(function (moduleNameMetadataPath) { + // update module + t.traverse(ast, { + Module: function (_Module) { + function Module(_x7) { + return _Module.apply(this, arguments); + } + + Module.toString = function () { + return _Module.toString(); + }; + + return Module; + }(function (_ref7) { + var node = _ref7.node; + var name = moduleNameMetadataPath.node.value; // compatiblity with wast-parser + + if (name === "") { + name = null; + } + + node.id = name; + }) + }); + }) + }); +} + +function decode(buf, customOpts) { + var opts = Object.assign({}, defaultDecoderOpts, customOpts); + var ast = decoder.decode(buf, opts); + + if (opts.ignoreCustomNameSection === false) { + restoreFunctionNames(ast); + restoreLocalNames(ast); + restoreModuleName(ast); + } + + return ast; +}
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