| // 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) { |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalString = global.String; |
| var matchSymbol = utils.ImportNow("match_symbol"); |
| var searchSymbol = utils.ImportNow("search_symbol"); |
| |
| //------------------------------------------------------------------- |
| |
| // ECMA-262, section 15.5.4.6 |
| function StringConcat(other /* and more */) { // length == 1 |
| "use strict"; |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.concat"); |
| var s = TO_STRING(this); |
| var len = arguments.length; |
| for (var i = 0; i < len; ++i) { |
| s = s + TO_STRING(arguments[i]); |
| } |
| return s; |
| } |
| |
| |
| // ES6 21.1.3.11. |
| function StringMatchJS(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); |
| } |
| |
| // ES6 21.1.3.15. |
| function StringSearch(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); |
| } |
| |
| |
| // ECMA-262 section 15.5.4.13 |
| function StringSlice(start, end) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.slice"); |
| |
| var s = TO_STRING(this); |
| var s_len = s.length; |
| var start_i = TO_INTEGER(start); |
| var end_i = s_len; |
| if (!IS_UNDEFINED(end)) { |
| end_i = TO_INTEGER(end); |
| } |
| |
| if (start_i < 0) { |
| start_i += s_len; |
| if (start_i < 0) { |
| start_i = 0; |
| } |
| } else { |
| if (start_i > s_len) { |
| return ''; |
| } |
| } |
| |
| if (end_i < 0) { |
| end_i += s_len; |
| if (end_i < 0) { |
| return ''; |
| } |
| } else { |
| if (end_i > s_len) { |
| end_i = s_len; |
| } |
| } |
| |
| if (end_i <= start_i) { |
| return ''; |
| } |
| |
| return %_SubString(s, start_i, end_i); |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.2.1 |
| function HtmlEscape(str) { |
| return %RegExpInternalReplace(/"/g, TO_STRING(str), """); |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.2 |
| function StringAnchor(name) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.anchor"); |
| return "<a name=\"" + HtmlEscape(name) + "\">" + TO_STRING(this) + |
| "</a>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.3 |
| function StringBig() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.big"); |
| return "<big>" + TO_STRING(this) + "</big>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.4 |
| function StringBlink() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.blink"); |
| return "<blink>" + TO_STRING(this) + "</blink>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.5 |
| function StringBold() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.bold"); |
| return "<b>" + TO_STRING(this) + "</b>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.6 |
| function StringFixed() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fixed"); |
| return "<tt>" + TO_STRING(this) + "</tt>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.7 |
| function StringFontcolor(color) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontcolor"); |
| return "<font color=\"" + HtmlEscape(color) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.8 |
| function StringFontsize(size) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.fontsize"); |
| return "<font size=\"" + HtmlEscape(size) + "\">" + TO_STRING(this) + |
| "</font>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.9 |
| function StringItalics() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.italics"); |
| return "<i>" + TO_STRING(this) + "</i>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.10 |
| function StringLink(s) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.link"); |
| return "<a href=\"" + HtmlEscape(s) + "\">" + TO_STRING(this) + "</a>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.11 |
| function StringSmall() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.small"); |
| return "<small>" + TO_STRING(this) + "</small>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.12 |
| function StringStrike() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.strike"); |
| return "<strike>" + TO_STRING(this) + "</strike>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.13 |
| function StringSub() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sub"); |
| return "<sub>" + TO_STRING(this) + "</sub>"; |
| } |
| |
| |
| // ES6 draft, revision 26 (2014-07-18), section B.2.3.14 |
| function StringSup() { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.sup"); |
| return "<sup>" + TO_STRING(this) + "</sup>"; |
| } |
| |
| // ES6, section 21.1.3.13 |
| function StringRepeat(count) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.repeat"); |
| |
| var s = TO_STRING(this); |
| var n = TO_INTEGER(count); |
| |
| if (n < 0 || n === INFINITY) throw %make_range_error(kInvalidCountValue); |
| |
| // Early return to allow an arbitrarily-large repeat of the empty string. |
| if (s.length === 0) return ""; |
| |
| // The maximum string length is stored in a smi, so a longer repeat |
| // must result in a range error. |
| if (n > %_MaxSmi()) throw %make_range_error(kInvalidCountValue); |
| |
| var r = ""; |
| while (true) { |
| if (n & 1) r += s; |
| n >>= 1; |
| if (n === 0) return r; |
| s += s; |
| } |
| } |
| |
| |
| // ES6 Draft 05-22-2014, section 21.1.3.3 |
| function StringCodePointAt(pos) { |
| CHECK_OBJECT_COERCIBLE(this, "String.prototype.codePointAt"); |
| |
| var string = TO_STRING(this); |
| var size = string.length; |
| pos = TO_INTEGER(pos); |
| if (pos < 0 || pos >= size) { |
| return UNDEFINED; |
| } |
| var first = %_StringCharCodeAt(string, pos); |
| if (first < 0xD800 || first > 0xDBFF || pos + 1 == size) { |
| return first; |
| } |
| var second = %_StringCharCodeAt(string, pos + 1); |
| if (second < 0xDC00 || second > 0xDFFF) { |
| return first; |
| } |
| return (first - 0xD800) * 0x400 + second + 0x2400; |
| } |
| |
| |
| // ------------------------------------------------------------------- |
| // String methods related to templates |
| |
| // ES6 Draft 03-17-2015, section 21.1.2.4 |
| function StringRaw(callSite) { |
| "use strict"; |
| 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; |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| // Set up the non-enumerable functions on the String object. |
| utils.InstallFunctions(GlobalString, DONT_ENUM, [ |
| "raw", StringRaw |
| ]); |
| |
| // Set up the non-enumerable functions on the String prototype object. |
| utils.InstallFunctions(GlobalString.prototype, DONT_ENUM, [ |
| "codePointAt", StringCodePointAt, |
| "concat", StringConcat, |
| "match", StringMatchJS, |
| "repeat", StringRepeat, |
| "search", StringSearch, |
| "slice", StringSlice, |
| |
| "link", StringLink, |
| "anchor", StringAnchor, |
| "fontcolor", StringFontcolor, |
| "fontsize", StringFontsize, |
| "big", StringBig, |
| "blink", StringBlink, |
| "bold", StringBold, |
| "fixed", StringFixed, |
| "italics", StringItalics, |
| "small", StringSmall, |
| "strike", StringStrike, |
| "sub", StringSub, |
| "sup", StringSup |
| ]); |
| |
| }) |