1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/builtin/String.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,202 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/*global intl_Collator: false, */
1.9 +
1.10 +/* ES6 Draft September 5, 2013 21.1.3.3 */
1.11 +function String_codePointAt(pos) {
1.12 + // Steps 1-3.
1.13 + CheckObjectCoercible(this);
1.14 + var S = ToString(this);
1.15 +
1.16 + // Steps 4-5.
1.17 + var position = ToInteger(pos);
1.18 +
1.19 + // Step 6.
1.20 + var size = S.length;
1.21 +
1.22 + // Step 7.
1.23 + if (position < 0 || position >= size)
1.24 + return undefined;
1.25 +
1.26 + // Steps 8-9.
1.27 + var first = callFunction(std_String_charCodeAt, S, position);
1.28 + if (first < 0xD800 || first > 0xDBFF || position + 1 === size)
1.29 + return first;
1.30 +
1.31 + // Steps 10-11.
1.32 + var second = callFunction(std_String_charCodeAt, S, position + 1);
1.33 + if (second < 0xDC00 || second > 0xDFFF)
1.34 + return first;
1.35 +
1.36 + // Step 12.
1.37 + return (first - 0xD800) * 0x400 + (second - 0xDC00) + 0x10000;
1.38 +}
1.39 +
1.40 +var collatorCache = new Record();
1.41 +
1.42 +/* ES6 20121122 draft 15.5.4.21. */
1.43 +function String_repeat(count) {
1.44 + // Steps 1-3.
1.45 + CheckObjectCoercible(this);
1.46 + var S = ToString(this);
1.47 +
1.48 + // Steps 4-5.
1.49 + var n = ToInteger(count);
1.50 +
1.51 + // Steps 6-7.
1.52 + if (n < 0)
1.53 + ThrowError(JSMSG_NEGATIVE_REPETITION_COUNT); // a RangeError
1.54 +
1.55 + if (!(n * S.length < (1 << 28)))
1.56 + ThrowError(JSMSG_RESULTING_STRING_TOO_LARGE); // a RangeError
1.57 +
1.58 + // Communicate |n|'s possible range to the compiler.
1.59 + n = n & ((1 << 28) - 1);
1.60 +
1.61 + // Steps 8-9.
1.62 + var T = "";
1.63 + for (;;) {
1.64 + if (n & 1)
1.65 + T += S;
1.66 + n >>= 1;
1.67 + if (n)
1.68 + S += S;
1.69 + else
1.70 + break;
1.71 + }
1.72 + return T;
1.73 +}
1.74 +
1.75 +#define STRING_ITERATOR_SLOT_ITERATED_OBJECT 0
1.76 +#define STRING_ITERATOR_SLOT_NEXT_INDEX 1
1.77 +
1.78 +// ES6 draft specification, section 21.1.3.27, version 2013-09-27.
1.79 +function String_iterator() {
1.80 + CheckObjectCoercible(this);
1.81 + var S = ToString(this);
1.82 + var iterator = NewStringIterator();
1.83 + UnsafeSetReservedSlot(iterator, STRING_ITERATOR_SLOT_ITERATED_OBJECT, S);
1.84 + UnsafeSetReservedSlot(iterator, STRING_ITERATOR_SLOT_NEXT_INDEX, 0);
1.85 + return iterator;
1.86 +}
1.87 +
1.88 +function StringIteratorIdentity() {
1.89 + return this;
1.90 +}
1.91 +
1.92 +function StringIteratorNext() {
1.93 + // FIXME: Cross-compartment wrapper StringIterator objects should pass this test. Bug 924059.
1.94 + if (!IsObject(this) || !IsStringIterator(this))
1.95 + ThrowError(JSMSG_INCOMPATIBLE_METHOD, "StringIterator", "next", ToString(this));
1.96 +
1.97 + var S = UnsafeGetReservedSlot(this, STRING_ITERATOR_SLOT_ITERATED_OBJECT);
1.98 + var index = UnsafeGetReservedSlot(this, STRING_ITERATOR_SLOT_NEXT_INDEX);
1.99 + var size = S.length;
1.100 +
1.101 + if (index >= size) {
1.102 + return { value: undefined, done: true };
1.103 + }
1.104 +
1.105 + var charCount = 1;
1.106 + var first = callFunction(std_String_charCodeAt, S, index);
1.107 + if (first >= 0xD800 && first <= 0xDBFF && index + 1 < size) {
1.108 + var second = callFunction(std_String_charCodeAt, S, index + 1);
1.109 + if (second >= 0xDC00 && second <= 0xDFFF) {
1.110 + charCount = 2;
1.111 + }
1.112 + }
1.113 +
1.114 + UnsafeSetReservedSlot(this, STRING_ITERATOR_SLOT_NEXT_INDEX, index + charCount);
1.115 + var value = callFunction(std_String_substring, S, index, index + charCount);
1.116 +
1.117 + return { value: value, done: false };
1.118 +}
1.119 +
1.120 +/**
1.121 + * Compare this String against that String, using the locale and collation
1.122 + * options provided.
1.123 + *
1.124 + * Spec: ECMAScript Internationalization API Specification, 13.1.1.
1.125 + */
1.126 +function String_localeCompare(that) {
1.127 + // Steps 1-3.
1.128 + CheckObjectCoercible(this);
1.129 + var S = ToString(this);
1.130 + var That = ToString(that);
1.131 +
1.132 + // Steps 4-5.
1.133 + var locales = arguments.length > 1 ? arguments[1] : undefined;
1.134 + var options = arguments.length > 2 ? arguments[2] : undefined;
1.135 +
1.136 + // Step 6.
1.137 + var collator;
1.138 + if (locales === undefined && options === undefined) {
1.139 + // This cache only optimizes for the old ES5 localeCompare without
1.140 + // locales and options.
1.141 + if (collatorCache.collator === undefined)
1.142 + collatorCache.collator = intl_Collator(locales, options);
1.143 + collator = collatorCache.collator;
1.144 + } else {
1.145 + collator = intl_Collator(locales, options);
1.146 + }
1.147 +
1.148 + // Step 7.
1.149 + return intl_CompareStrings(collator, S, That);
1.150 +}
1.151 +
1.152 +/* ES6 Draft September 5, 2013 21.1.2.2 */
1.153 +function String_static_fromCodePoint() {
1.154 + // Step 1. is not relevant
1.155 + // Step 2.
1.156 + var length = arguments.length;
1.157 +
1.158 + // Step 3.
1.159 + var elements = new List();
1.160 +
1.161 + // Step 4-5., 5g.
1.162 + for (var nextIndex = 0; nextIndex < length; nextIndex++) {
1.163 + // Step 5a.
1.164 + var next = arguments[nextIndex];
1.165 + // Step 5b-c.
1.166 + var nextCP = ToNumber(next);
1.167 +
1.168 + // Step 5d.
1.169 + if (nextCP !== ToInteger(nextCP) || std_isNaN(nextCP))
1.170 + ThrowError(JSMSG_NOT_A_CODEPOINT, ToString(nextCP));
1.171 +
1.172 + // Step 5e.
1.173 + if (nextCP < 0 || nextCP > 0x10FFFF)
1.174 + ThrowError(JSMSG_NOT_A_CODEPOINT, ToString(nextCP));
1.175 +
1.176 + // Step 5f.
1.177 + // Inlined UTF-16 Encoding
1.178 + if (nextCP <= 0xFFFF) {
1.179 + elements.push(nextCP);
1.180 + continue;
1.181 + }
1.182 +
1.183 + elements.push((((nextCP - 0x10000) / 0x400) | 0) + 0xD800);
1.184 + elements.push((nextCP - 0x10000) % 0x400 + 0xDC00);
1.185 + }
1.186 +
1.187 + // Step 6.
1.188 + return callFunction(std_Function_apply, std_String_fromCharCode, null, elements);
1.189 +}
1.190 +
1.191 +/**
1.192 + * Compare String str1 against String str2, using the locale and collation
1.193 + * options provided.
1.194 + *
1.195 + * Mozilla proprietary.
1.196 + * Spec: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String#String_generic_methods
1.197 + */
1.198 +function String_static_localeCompare(str1, str2) {
1.199 + if (arguments.length < 1)
1.200 + ThrowError(JSMSG_MISSING_FUN_ARG, 0, "String.localeCompare");
1.201 + var locales = arguments.length > 2 ? arguments[2] : undefined;
1.202 + var options = arguments.length > 3 ? arguments[3] : undefined;
1.203 + return callFunction(String_localeCompare, str1, str2, locales, options);
1.204 +}
1.205 +
