| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| (function(global, utils) { |
| |
| "use strict"; |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalString = global.String; |
| var matchSymbol = utils.ImportNow("match_symbol"); |
| var searchSymbol = utils.ImportNow("search_symbol"); |
| |
| //------------------------------------------------------------------- |
| |
| // Set up the non-enumerable functions on the String prototype object. |
| DEFINE_METHODS( |
| GlobalString.prototype, |
| { |
| /* ES#sec-string.prototype.match */ |
| match(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.match"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var matcher = pattern[matchSymbol]; |
| if (!IS_UNDEFINED(matcher)) { |
| return %_Call(matcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| // Equivalent to RegExpCreate (ES#sec-regexpcreate) |
| var regexp = %RegExpCreate(pattern); |
| return regexp[matchSymbol](subject); |
| } |
| |
| /* ES#sec-string.prototype.search */ |
| search(pattern) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.search"); |
| |
| if (!IS_NULL_OR_UNDEFINED(pattern)) { |
| var searcher = pattern[searchSymbol]; |
| if (!IS_UNDEFINED(searcher)) { |
| return %_Call(searcher, pattern, this); |
| } |
| } |
| |
| var subject = TO_STRING(this); |
| |
| // Equivalent to RegExpCreate (ES#sec-regexpcreate) |
| var regexp = %RegExpCreate(pattern); |
| return %_Call(regexp[searchSymbol], regexp, subject); |
| } |
| } |
| ); |
| |
| function StringPad(thisString, maxLength, fillString) { |
| maxLength = TO_LENGTH(maxLength); |
| var stringLength = thisString.length; |
| |
| if (maxLength <= stringLength) return ""; |
| |
| if (IS_UNDEFINED(fillString)) { |
| fillString = " "; |
| } else { |
| fillString = TO_STRING(fillString); |
| if (fillString === "") { |
| // If filler is the empty String, return S. |
| return ""; |
| } |
| } |
| |
| var fillLength = maxLength - stringLength; |
| var repetitions = (fillLength / fillString.length) | 0; |
| var remainingChars = (fillLength - fillString.length * repetitions) | 0; |
| |
| var filler = ""; |
| while (true) { |
| if (repetitions & 1) filler += fillString; |
| repetitions >>= 1; |
| if (repetitions === 0) break; |
| fillString += fillString; |
| } |
| |
| if (remainingChars) { |
| filler += %_SubString(fillString, 0, remainingChars); |
| } |
| |
| return filler; |
| } |
| |
| DEFINE_METHODS_LEN( |
| GlobalString.prototype, |
| { |
| /* ES#sec-string.prototype.padstart */ |
| /* String.prototype.padStart(maxLength [, fillString]) */ |
| padStart(maxLength, fillString) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.padStart"); |
| var thisString = TO_STRING(this); |
| |
| return StringPad(thisString, maxLength, fillString) + thisString; |
| } |
| |
| /* ES#sec-string.prototype.padend */ |
| /* String.prototype.padEnd(maxLength [, fillString]) */ |
| padEnd(maxLength, fillString) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.padEnd"); |
| var thisString = TO_STRING(this); |
| |
| return thisString + StringPad(thisString, maxLength, fillString); |
| } |
| }, |
| 1 /* Set functions length */ |
| ); |
| |
| // ------------------------------------------------------------------- |
| // String methods related to templates |
| |
| // Set up the non-enumerable functions on the String object. |
| DEFINE_METHOD( |
| GlobalString, |
| |
| /* ES#sec-string.raw */ |
| raw(callSite) { |
| var numberOfSubstitutions = arguments.length; |
| var cooked = TO_OBJECT(callSite); |
| var raw = TO_OBJECT(cooked.raw); |
| var literalSegments = TO_LENGTH(raw.length); |
| if (literalSegments <= 0) return ""; |
| |
| var result = TO_STRING(raw[0]); |
| |
| for (var i = 1; i < literalSegments; ++i) { |
| if (i < numberOfSubstitutions) { |
| result += TO_STRING(arguments[i]); |
| } |
| result += TO_STRING(raw[i]); |
| } |
| |
| return result; |
| } |
| ); |
| |
| // ------------------------------------------------------------------- |
| |
| }) |