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rOACCT/node_modules/@webassemblyjs/ast/lib/transform/wast-identifier-to-index/index.js
324418211df6validity_dates

index.js
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			"use strict";

			Object.defineProperty(exports, "__esModule", {
			value: true
			});
			exports.transform = transform;

			var _index = require("../../index");

			var _helperModuleContext = require("@webassemblyjs/helper-module-context");

			function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

			function _sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

			function _slicedToArray(arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return _sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }

			// FIXME(sven): do the same with all block instructions, must be more generic here
			function newUnexpectedFunction(i) {
			return new Error("unknown function at offset: " + i);
			}

			function transform(ast) {
			var module;
			(0, _index.traverse)(ast, {
			Module: function (_Module) {
			function Module(_x) {
			return _Module.apply(this, arguments);
			}

			Module.toString = function () {
			return _Module.toString();
			};

			return Module;
			}(function (path) {
			module = path.node;
			})
			});
			var moduleContext = (0, _helperModuleContext.moduleContextFromModuleAST)(module); // Transform the actual instruction in function bodies

			(0, _index.traverse)(ast, {
			Func: function (_Func) {
			function Func(_x2) {
			return _Func.apply(this, arguments);
			}

			Func.toString = function () {
			return _Func.toString();
			};

			return Func;
			}(function (path) {
			transformFuncPath(path, moduleContext);
			}),
			Start: function (_Start) {
			function Start(_x3) {
			return _Start.apply(this, arguments);
			}

			Start.toString = function () {
			return _Start.toString();
			};

			return Start;
			}(function (path) {
			var index = path.node.index;

			if ((0, _index.isIdentifier)(index) === true) {
			var offsetInModule = moduleContext.getFunctionOffsetByIdentifier(index.value);

			if (typeof offsetInModule === "undefined") {
			throw newUnexpectedFunction(index.value);
			} // Replace the index Identifier
			// $FlowIgnore: reference?


			path.node.index = (0, _index.numberLiteralFromRaw)(offsetInModule);
			}
			})
			});
			}

			function transformFuncPath(funcPath, moduleContext) {
			var funcNode = funcPath.node;
			var signature = funcNode.signature;

			if (signature.type !== "Signature") {
			throw new Error("Function signatures must be denormalised before execution");
			}

			var params = signature.params; // Add func locals in the context

			params.forEach(function (p) {
			return moduleContext.addLocal(p.valtype);
			});
			(0, _index.traverse)(funcNode, {
			Instr: function (_Instr) {
			function Instr(_x4) {
			return _Instr.apply(this, arguments);
			}

			Instr.toString = function () {
			return _Instr.toString();
			};

			return Instr;
			}(function (instrPath) {
			var instrNode = instrPath.node;
			/**
			* Local access
			*/

			if (instrNode.id === "get_local" \|\| instrNode.id === "set_local" \|\| instrNode.id === "tee_local") {
			var _instrNode$args = _slicedToArray(instrNode.args, 1),
			firstArg = _instrNode$args[0];

			if (firstArg.type === "Identifier") {
			var offsetInParams = params.findIndex(function (_ref) {
			var id = _ref.id;
			return id === firstArg.value;
			});

			if (offsetInParams === -1) {
			throw new Error("".concat(firstArg.value, " not found in ").concat(instrNode.id, ": not declared in func params"));
			} // Replace the Identifer node by our new NumberLiteral node


			instrNode.args[0] = (0, _index.numberLiteralFromRaw)(offsetInParams);
			}
			}
			/**
			* Global access
			*/


			if (instrNode.id === "get_global" \|\| instrNode.id === "set_global") {
			var _instrNode$args2 = _slicedToArray(instrNode.args, 1),
			_firstArg = _instrNode$args2[0];

			if ((0, _index.isIdentifier)(_firstArg) === true) {
			var globalOffset = moduleContext.getGlobalOffsetByIdentifier( // $FlowIgnore: reference?
			_firstArg.value);

			if (typeof globalOffset === "undefined") {
			// $FlowIgnore: reference?
			throw new Error("global ".concat(_firstArg.value, " not found in module"));
			} // Replace the Identifer node by our new NumberLiteral node


			instrNode.args[0] = (0, _index.numberLiteralFromRaw)(globalOffset);
			}
			}
			/**
			* Labels lookup
			*/


			if (instrNode.id === "br") {
			var _instrNode$args3 = _slicedToArray(instrNode.args, 1),
			_firstArg2 = _instrNode$args3[0];

			if ((0, _index.isIdentifier)(_firstArg2) === true) {
			// if the labels is not found it is going to be replaced with -1
			// which is invalid.
			var relativeBlockCount = -1; // $FlowIgnore: reference?

			instrPath.findParent(function (_ref2) {
			var node = _ref2.node;

			if ((0, _index.isBlock)(node)) {
			relativeBlockCount++; // $FlowIgnore: reference?

			var name = node.label \|\| node.name;

			if (_typeof(name) === "object") {
			// $FlowIgnore: isIdentifier ensures that
			if (name.value === _firstArg2.value) {
			// Found it
			return false;
			}
			}
			}

			if ((0, _index.isFunc)(node)) {
			return false;
			}
			}); // Replace the Identifer node by our new NumberLiteral node

			instrNode.args[0] = (0, _index.numberLiteralFromRaw)(relativeBlockCount);
			}
			}
			}),

			/**
			* Func lookup
			*/
			CallInstruction: function (_CallInstruction) {
			function CallInstruction(_x5) {
			return _CallInstruction.apply(this, arguments);
			}

			CallInstruction.toString = function () {
			return _CallInstruction.toString();
			};

			return CallInstruction;
			}(function (_ref3) {
			var node = _ref3.node;
			var index = node.index;

			if ((0, _index.isIdentifier)(index) === true) {
			var offsetInModule = moduleContext.getFunctionOffsetByIdentifier(index.value);

			if (typeof offsetInModule === "undefined") {
			throw newUnexpectedFunction(index.value);
			} // Replace the index Identifier
			// $FlowIgnore: reference?


			node.index = (0, _index.numberLiteralFromRaw)(offsetInModule);
			}
			})
			});
			}