First Commit

node_modules/fastparse/lib/Parser.js

@@ -0,0 +1,108 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+function ignoreFunction() {}
+
+function createReturningFunction(value) {
+	return function() {
+		return value;
+	};
+}
+
+function Parser(states) {
+	this.states = this.compileStates(states);
+}
+
+Parser.prototype.compileStates = function(states) {
+	var result = {};
+	Object.keys(states).forEach(function(name) {
+		result[name] = this.compileState(states[name], states);
+	}, this);
+	return result;
+};
+
+Parser.prototype.compileState = function(state, states) {
+	var regExps = [];
+	function iterator(str, value) {
+		regExps.push({
+			groups: Parser.getGroupCount(str),
+			regExp: str,
+			value: value
+		});
+	}
+	function processState(statePart) {
+		if(Array.isArray(statePart)) {
+			statePart.forEach(processState);
+		} else if(typeof statePart === "object") {
+			Object.keys(statePart).forEach(function(key) {
+				iterator(key, statePart[key]);
+			});
+		} else if(typeof statePart === "string") {
+			processState(states[statePart]);
+		} else {
+			throw new Error("Unexpected 'state' format");
+		}
+	}
+	processState(state);
+	var total = regExps.map(function(r) {
+		return "(" + r.regExp + ")";
+	}).join("|");
+	var actions = [];
+	var pos = 1;
+	regExps.forEach(function(r) {
+		var fn;
+		if(typeof r.value === "function") {
+			fn = r.value;
+		} else if(typeof r.value === "string") {
+			fn = createReturningFunction(r.value);
+		} else {
+			fn = ignoreFunction;
+		}
+		actions.push({
+			name: r.regExp,
+			fn: fn,
+			pos: pos,
+			pos2: pos + r.groups + 1
+		});
+		pos += r.groups + 1;
+	});
+	return {
+		regExp: new RegExp(total, "g"),
+		actions: actions
+	};
+};
+
+Parser.getGroupCount = function(regExpStr) {
+	return new RegExp("(" + regExpStr + ")|^$").exec("").length - 2;
+};
+
+Parser.prototype.parse = function(initialState, string, context) {
+	context = context || {};
+	var currentState = initialState;
+	var currentIndex = 0;
+	for(;;) {
+		var state = this.states[currentState];
+		var regExp = state.regExp;
+		regExp.lastIndex = currentIndex;
+		var match = regExp.exec(string);
+		if(!match) return context;
+		var actions = state.actions;
+		currentIndex = state.regExp.lastIndex;
+		for(var i = 0; i < actions.length; i++) {
+			var action = actions[i];
+			if(match[action.pos]) {
+				var ret = action.fn.apply(context, Array.prototype.slice.call(match, action.pos, action.pos2).concat([state.regExp.lastIndex - match[0].length, match[0].length]));
+				if(ret) {
+					if(!(ret in this.states))
+						throw new Error("State '" + ret + "' doesn't exist");
+					currentState = ret;
+				}
+				break;
+			}
+		}
+	}
+};
+
+module.exports = Parser;