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Diffstat (limited to 'deps/v8/src/harmony-string.js')
-rw-r--r-- | deps/v8/src/harmony-string.js | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/deps/v8/src/harmony-string.js b/deps/v8/src/harmony-string.js deleted file mode 100644 index 6bbe139e87..0000000000 --- a/deps/v8/src/harmony-string.js +++ /dev/null @@ -1,194 +0,0 @@ -// Copyright 2014 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. - -"use strict"; - -// This file relies on the fact that the following declaration has been made -// in runtime.js: -// var $String = global.String; -// var $Array = global.Array; - -// ------------------------------------------------------------------- - -// ES6 draft 01-20-14, section 21.1.3.13 -function StringRepeat(count) { - CHECK_OBJECT_COERCIBLE(this, "String.prototype.repeat"); - - var s = TO_STRING_INLINE(this); - var n = ToInteger(count); - // The maximum string length is stored in a smi, so a longer repeat - // must result in a range error. - if (n < 0 || n > %_MaxSmi()) { - throw MakeRangeError("invalid_count_value", []); - } - - var r = ""; - while (true) { - if (n & 1) r += s; - n >>= 1; - if (n === 0) return r; - s += s; - } -} - - -// ES6 draft 04-05-14, section 21.1.3.18 -function StringStartsWith(searchString /* position */) { // length == 1 - CHECK_OBJECT_COERCIBLE(this, "String.prototype.startsWith"); - - var s = TO_STRING_INLINE(this); - - if (IS_REGEXP(searchString)) { - throw MakeTypeError("first_argument_not_regexp", - ["String.prototype.startsWith"]); - } - - var ss = TO_STRING_INLINE(searchString); - var pos = 0; - if (%_ArgumentsLength() > 1) { - pos = %_Arguments(1); // position - pos = ToInteger(pos); - } - - var s_len = s.length; - var start = MathMin(MathMax(pos, 0), s_len); - var ss_len = ss.length; - if (ss_len + start > s_len) { - return false; - } - - return %StringIndexOf(s, ss, start) === start; -} - - -// ES6 draft 04-05-14, section 21.1.3.7 -function StringEndsWith(searchString /* position */) { // length == 1 - CHECK_OBJECT_COERCIBLE(this, "String.prototype.endsWith"); - - var s = TO_STRING_INLINE(this); - - if (IS_REGEXP(searchString)) { - throw MakeTypeError("first_argument_not_regexp", - ["String.prototype.endsWith"]); - } - - var ss = TO_STRING_INLINE(searchString); - var s_len = s.length; - var pos = s_len; - if (%_ArgumentsLength() > 1) { - var arg = %_Arguments(1); // position - if (!IS_UNDEFINED(arg)) { - pos = ToInteger(arg); - } - } - - var end = MathMin(MathMax(pos, 0), s_len); - var ss_len = ss.length; - var start = end - ss_len; - if (start < 0) { - return false; - } - - return %StringLastIndexOf(s, ss, start) === start; -} - - -// ES6 draft 04-05-14, section 21.1.3.6 -function StringIncludes(searchString /* position */) { // length == 1 - CHECK_OBJECT_COERCIBLE(this, "String.prototype.includes"); - - var s = TO_STRING_INLINE(this); - - if (IS_REGEXP(searchString)) { - throw MakeTypeError("first_argument_not_regexp", - ["String.prototype.includes"]); - } - - var ss = TO_STRING_INLINE(searchString); - var pos = 0; - if (%_ArgumentsLength() > 1) { - pos = %_Arguments(1); // position - pos = ToInteger(pos); - } - - var s_len = s.length; - var start = MathMin(MathMax(pos, 0), s_len); - var ss_len = ss.length; - if (ss_len + start > s_len) { - return false; - } - - return %StringIndexOf(s, ss, start) !== -1; -} - - -// ES6 Draft 05-22-2014, section 21.1.3.3 -function StringCodePointAt(pos) { - CHECK_OBJECT_COERCIBLE(this, "String.prototype.codePointAt"); - - var string = TO_STRING_INLINE(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; -} - - -// ES6 Draft 05-22-2014, section 21.1.2.2 -function StringFromCodePoint(_) { // length = 1 - var code; - var length = %_ArgumentsLength(); - var index; - var result = ""; - for (index = 0; index < length; index++) { - code = %_Arguments(index); - if (!%_IsSmi(code)) { - code = ToNumber(code); - } - if (code < 0 || code > 0x10FFFF || code !== TO_INTEGER(code)) { - throw MakeRangeError("invalid_code_point", [code]); - } - if (code <= 0xFFFF) { - result += %_StringCharFromCode(code); - } else { - code -= 0x10000; - result += %_StringCharFromCode((code >>> 10) & 0x3FF | 0xD800); - result += %_StringCharFromCode(code & 0x3FF | 0xDC00); - } - } - return result; -} - - -// ------------------------------------------------------------------- - -function ExtendStringPrototype() { - %CheckIsBootstrapping(); - - // Set up the non-enumerable functions on the String object. - InstallFunctions($String, DONT_ENUM, $Array( - "fromCodePoint", StringFromCodePoint - )); - - // Set up the non-enumerable functions on the String prototype object. - InstallFunctions($String.prototype, DONT_ENUM, $Array( - "codePointAt", StringCodePointAt, - "includes", StringIncludes, - "endsWith", StringEndsWith, - "repeat", StringRepeat, - "startsWith", StringStartsWith - )); -} - -ExtendStringPrototype(); |