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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/@webassemblyjs/helper-fsm/lib/index.js
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Diffstat (limited to 'node_modules/@webassemblyjs/helper-fsm/lib/index.js')
-rw-r--r--node_modules/@webassemblyjs/helper-fsm/lib/index.js109
1 files changed, 109 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/helper-fsm/lib/index.js b/node_modules/@webassemblyjs/helper-fsm/lib/index.js
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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.makeTransition = makeTransition;
+exports.FSM = void 0;
+
+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"); } }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+var STOP = Symbol("STOP");
+
+function makeTransition(regex, nextState) {
+ var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
+ _ref$n = _ref.n,
+ n = _ref$n === void 0 ? 1 : _ref$n,
+ allowedSeparator = _ref.allowedSeparator;
+
+ return function (instance) {
+ if (allowedSeparator) {
+ if (instance.input[instance.ptr] === allowedSeparator) {
+ if (regex.test(instance.input.substring(instance.ptr - 1, instance.ptr))) {
+ // Consume the separator and stay in current state
+ return [instance.currentState, 1];
+ } else {
+ return [instance.terminatingState, 0];
+ }
+ }
+ }
+
+ if (regex.test(instance.input.substring(instance.ptr, instance.ptr + n))) {
+ return [nextState, n];
+ }
+
+ return false;
+ };
+}
+
+function combineTransitions(transitions) {
+ return function () {
+ var match = false;
+ var currentTransitions = transitions[this.currentState] || [];
+
+ for (var i = 0; i < currentTransitions.length; ++i) {
+ match = currentTransitions[i](this);
+
+ if (match !== false) {
+ break;
+ }
+ }
+
+ return match || [this.terminatingState, 0];
+ };
+}
+
+var FSM =
+/*#__PURE__*/
+function () {
+ function FSM(transitions, initialState) {
+ var terminatingState = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : STOP;
+
+ _classCallCheck(this, FSM);
+
+ this.initialState = initialState;
+ this.terminatingState = terminatingState;
+
+ if (terminatingState === STOP || !transitions[terminatingState]) {
+ transitions[terminatingState] = [];
+ }
+
+ this.transitionFunction = combineTransitions.call(this, transitions);
+ }
+
+ _createClass(FSM, [{
+ key: "run",
+ value: function run(input) {
+ this.input = input;
+ this.ptr = 0;
+ this.currentState = this.initialState;
+ var value = "";
+ var eatLength, nextState;
+
+ while (this.currentState !== this.terminatingState && this.ptr < this.input.length) {
+ var _transitionFunction = this.transitionFunction();
+
+ var _transitionFunction2 = _slicedToArray(_transitionFunction, 2);
+
+ nextState = _transitionFunction2[0];
+ eatLength = _transitionFunction2[1];
+ value += this.input.substring(this.ptr, this.ptr += eatLength);
+ this.currentState = nextState;
+ }
+
+ return value;
+ }
+ }]);
+
+ return FSM;
+}();
+
+exports.FSM = FSM; \ No newline at end of file