Utility functions cleanup: Split lib/utils.js
Split lib/utils.js into multiple files. Some of the functions were generic, these were moved into files in lib/utils. Other funtions were specific for the compiler, these were moved to files in lib/compiler. This commit only moves functions around -- there is no renaming and cleanup performed. Both will come later.redux
David Majda
10 years ago
parent
ff8e877fce
commit
5adad3ae12
@ -0,0 +1,14 @@
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var arrays = require("../utils/arrays");
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/* AST utilities. */
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var asts = {
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findRuleByName: function(ast, name) {
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return arrays.find(ast.rules, function(r) { return r.name === name; });
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},
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indexOfRuleByName: function(ast, name) {
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return arrays.indexOf(ast.rules, function(r) { return r.name === name; });
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}
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};
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module.exports = asts;
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@ -0,0 +1,99 @@
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/* JavaScript code generation helpers. */
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var javascript = {
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/*
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* Returns a string padded on the left to a desired length with a character.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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padLeft: function(input, padding, length) {
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var result = input;
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var padLength = length - input.length;
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for (var i = 0; i < padLength; i++) {
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result = padding + result;
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}
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return result;
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},
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/*
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* Returns an escape sequence for given character. Uses \x for characters <=
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* 0xFF to save space, \u for the rest.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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escape: function(ch) {
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var charCode = ch.charCodeAt(0);
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var escapeChar;
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var length;
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if (charCode <= 0xFF) {
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escapeChar = 'x';
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length = 2;
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} else {
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escapeChar = 'u';
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length = 4;
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}
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return '\\' + escapeChar + javascript.padLeft(charCode.toString(16).toUpperCase(), '0', length);
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},
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/*
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* Surrounds the string with quotes and escapes characters inside so that the
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* result is a valid JavaScript string.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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quote: function(s) {
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/*
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* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
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* literal except for the closing quote character, backslash, carriage
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* return, line separator, paragraph separator, and line feed. Any character
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* may appear in the form of an escape sequence.
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*
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* For portability, we also escape all control and non-ASCII characters.
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* Note that "\0" and "\v" escape sequences are not used because JSHint does
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* not like the first and IE the second.
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*/
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return '"' + s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/"/g, '\\"') // closing quote character
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.replace(/\x08/g, '\\b') // backspace
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.replace(/\t/g, '\\t') // horizontal tab
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.replace(/\n/g, '\\n') // line feed
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.replace(/\f/g, '\\f') // form feed
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.replace(/\r/g, '\\r') // carriage return
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.replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, javascript.escape)
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+ '"';
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},
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/*
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* Escapes characters inside the string so that it can be used as a list of
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* characters in a character class of a regular expression.
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*/
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quoteForRegexpClass: function(s) {
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/*
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* Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1.
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*
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* For portability, we also escape all control and non-ASCII characters.
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*/
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return s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/\//g, '\\/') // closing slash
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.replace(/\]/g, '\\]') // closing bracket
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.replace(/\^/g, '\\^') // caret
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.replace(/-/g, '\\-') // dash
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.replace(/\0/g, '\\0') // null
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.replace(/\t/g, '\\t') // horizontal tab
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.replace(/\n/g, '\\n') // line feed
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.replace(/\v/g, '\\x0B') // vertical tab
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.replace(/\f/g, '\\f') // form feed
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.replace(/\r/g, '\\r') // carriage return
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.replace(/[\x01-\x08\x0E-\x1F\x80-\uFFFF]/g, javascript.escape);
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}
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};
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module.exports = javascript;
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@ -0,0 +1,17 @@
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/* Simple AST node visitor builder. */
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var visitor = {
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/*
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* Builds a node visitor -- a function which takes a node and any number of
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* other parameters, calls an appropriate function according to the node type,
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* passes it all its parameters and returns its value. The functions for
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* various node types are passed in a parameter to |buildNodeVisitor| as a
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* hash.
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*/
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buildNodeVisitor: function(functions) {
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return function(node) {
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return functions[node.type].apply(null, arguments);
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};
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}
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};
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module.exports = visitor;
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@ -1,236 +0,0 @@
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var utils = {
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/* Like Python's |range|, but without |step|. */
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range: function(start, stop) {
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if (stop === undefined) {
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stop = start;
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start = 0;
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}
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var result = new Array(Math.max(0, stop - start));
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for (var i = 0, j = start; j < stop; i++, j++) {
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result[i] = j;
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}
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return result;
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},
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find: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (callback(array[i])) {
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return array[i];
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}
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}
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},
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indexOf: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (callback(array[i])) {
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return i;
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}
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}
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return -1;
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},
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contains: function(array, value) {
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/*
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* Stupid IE does not have Array.prototype.indexOf, otherwise this function
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* would be a one-liner.
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*/
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (array[i] === value) {
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return true;
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}
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}
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return false;
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},
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each: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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callback(array[i], i);
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}
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},
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map: function(array, callback) {
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var result = [];
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var length = array.length;
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for (var i = 0; i < length; i++) {
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result[i] = callback(array[i], i);
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}
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return result;
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},
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pluck: function(array, key) {
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return utils.map(array, function (e) { return e[key]; });
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},
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keys: function(object) {
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var result = [];
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result.push(key);
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}
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}
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return result;
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},
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values: function(object) {
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var result = [];
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result.push(object[key]);
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}
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}
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return result;
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},
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clone: function(object) {
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var result = {};
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result[key] = object[key];
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}
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}
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return result;
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},
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defaults: function(object, defaults) {
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for (var key in defaults) {
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if (defaults.hasOwnProperty(key)) {
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if (!(key in object)) {
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object[key] = defaults[key];
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}
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}
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}
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},
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/*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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subclass: function(child, parent) {
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function ctor() { this.constructor = child; }
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ctor.prototype = parent.prototype;
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child.prototype = new ctor();
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},
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/*
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* Returns a string padded on the left to a desired length with a character.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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padLeft: function(input, padding, length) {
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var result = input;
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var padLength = length - input.length;
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for (var i = 0; i < padLength; i++) {
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result = padding + result;
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}
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return result;
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},
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/*
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* Returns an escape sequence for given character. Uses \x for characters <=
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* 0xFF to save space, \u for the rest.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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escape: function(ch) {
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var charCode = ch.charCodeAt(0);
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var escapeChar;
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var length;
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if (charCode <= 0xFF) {
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escapeChar = 'x';
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length = 2;
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} else {
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escapeChar = 'u';
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length = 4;
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}
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return '\\' + escapeChar + utils.padLeft(charCode.toString(16).toUpperCase(), '0', length);
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},
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/*
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* Surrounds the string with quotes and escapes characters inside so that the
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* result is a valid JavaScript string.
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*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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quote: function(s) {
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/*
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* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
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* literal except for the closing quote character, backslash, carriage
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* return, line separator, paragraph separator, and line feed. Any character
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* may appear in the form of an escape sequence.
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*
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* For portability, we also escape all control and non-ASCII characters.
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* Note that "\0" and "\v" escape sequences are not used because JSHint does
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* not like the first and IE the second.
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*/
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return '"' + s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/"/g, '\\"') // closing quote character
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.replace(/\x08/g, '\\b') // backspace
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.replace(/\t/g, '\\t') // horizontal tab
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.replace(/\n/g, '\\n') // line feed
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.replace(/\f/g, '\\f') // form feed
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.replace(/\r/g, '\\r') // carriage return
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.replace(/[\x00-\x07\x0B\x0E-\x1F\x80-\uFFFF]/g, utils.escape)
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+ '"';
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},
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/*
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* Escapes characters inside the string so that it can be used as a list of
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* characters in a character class of a regular expression.
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*/
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quoteForRegexpClass: function(s) {
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/*
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* Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1.
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*
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* For portability, we also escape all control and non-ASCII characters.
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*/
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return s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/\//g, '\\/') // closing slash
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.replace(/\]/g, '\\]') // closing bracket
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.replace(/\^/g, '\\^') // caret
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.replace(/-/g, '\\-') // dash
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.replace(/\0/g, '\\0') // null
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.replace(/\t/g, '\\t') // horizontal tab
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.replace(/\n/g, '\\n') // line feed
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.replace(/\v/g, '\\x0B') // vertical tab
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.replace(/\f/g, '\\f') // form feed
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.replace(/\r/g, '\\r') // carriage return
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.replace(/[\x01-\x08\x0E-\x1F\x80-\uFFFF]/g, utils.escape);
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},
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/*
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* Builds a node visitor -- a function which takes a node and any number of
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* other parameters, calls an appropriate function according to the node type,
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* passes it all its parameters and returns its value. The functions for
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* various node types are passed in a parameter to |buildNodeVisitor| as a
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* hash.
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*/
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buildNodeVisitor: function(functions) {
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return function(node) {
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return functions[node.type].apply(null, arguments);
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};
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},
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findRuleByName: function(ast, name) {
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return utils.find(ast.rules, function(r) { return r.name === name; });
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},
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indexOfRuleByName: function(ast, name) {
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return utils.indexOf(ast.rules, function(r) { return r.name === name; });
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}
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};
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module.exports = utils;
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@ -0,0 +1,71 @@
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/* Array utilities. */
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var arrays = {
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/* Like Python's |range|, but without |step|. */
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range: function(start, stop) {
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if (stop === undefined) {
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stop = start;
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start = 0;
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}
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var result = new Array(Math.max(0, stop - start));
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for (var i = 0, j = start; j < stop; i++, j++) {
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result[i] = j;
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}
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return result;
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},
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find: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (callback(array[i])) {
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return array[i];
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}
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}
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},
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indexOf: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (callback(array[i])) {
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return i;
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}
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}
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return -1;
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},
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contains: function(array, value) {
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/*
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* Stupid IE does not have Array.prototype.indexOf, otherwise this function
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* would be a one-liner.
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*/
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var length = array.length;
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for (var i = 0; i < length; i++) {
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if (array[i] === value) {
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return true;
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}
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}
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return false;
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},
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each: function(array, callback) {
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var length = array.length;
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for (var i = 0; i < length; i++) {
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callback(array[i], i);
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}
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},
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map: function(array, callback) {
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var result = [];
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var length = array.length;
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for (var i = 0; i < length; i++) {
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result[i] = callback(array[i], i);
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}
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return result;
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},
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pluck: function(array, key) {
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return arrays.map(array, function (e) { return e[key]; });
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}
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};
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module.exports = arrays;
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@ -0,0 +1,14 @@
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/* Class utilities */
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var classes = {
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/*
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* The code needs to be in sync with the code template in the compilation
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* function for "action" nodes.
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*/
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subclass: function(child, parent) {
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function ctor() { this.constructor = child; }
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ctor.prototype = parent.prototype;
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child.prototype = new ctor();
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},
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};
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module.exports = classes;
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@ -0,0 +1,44 @@
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/* Object utilities. */
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var objects = {
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keys: function(object) {
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var result = [];
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result.push(key);
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}
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}
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return result;
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},
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values: function(object) {
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var result = [];
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result.push(object[key]);
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}
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}
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return result;
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},
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clone: function(object) {
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var result = {};
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for (var key in object) {
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if (object.hasOwnProperty(key)) {
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result[key] = object[key];
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}
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}
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return result;
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},
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defaults: function(object, defaults) {
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for (var key in defaults) {
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if (defaults.hasOwnProperty(key)) {
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if (!(key in object)) {
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object[key] = defaults[key];
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}
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}
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}
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}
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};
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module.exports = objects;
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