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95 lines
2.7 KiB
JavaScript
95 lines
2.7 KiB
JavaScript
14 years ago
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/* ===== PEG.ArrayUtils ===== */
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/* Array manipulation utility functions. */
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PEG.ArrayUtils = {
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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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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]);
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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]);
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}
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return result;
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}
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};
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/* ===== PEG.StringUtils ===== */
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/* String manipulation utility functions. */
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PEG.StringUtils = {
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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 th 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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return '"' + s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/"/g, '\\"') // closing quote character
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.replace(/\r/g, '\\r') // carriage return
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.replace(/\u2028/g, '\\u2028') // line separator
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.replace(/\u2029/g, '\\u2029') // paragraph separator
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.replace(/\n/g, '\\n') // line feed
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+ '"';
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}
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};
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/* ===== PEG.RegExpUtils ===== */
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/* RegExp manipulation utility functions. */
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PEG.RegExpUtils = {
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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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quoteForClass: function(s) {
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/* Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1. */
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return s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/\0/g, '\\0') // null, IE needs this
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.replace(/\//g, '\\/') // closing slash
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.replace(/]/g, '\\]') // closing bracket
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.replace(/-/g, '\\-') // dash
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.replace(/\r/g, '\\r') // carriage return
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.replace(/\u2028/g, '\\u2028') // line separator
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.replace(/\u2029/g, '\\u2029') // paragraph separator
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.replace(/\n/g, '\\n') // line feed
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}
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};
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