michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*global intl_Collator: false, */
michael@0: 
michael@0: /* ES6 Draft September 5, 2013 21.1.3.3 */
michael@0: function String_codePointAt(pos) {
michael@0:     // Steps 1-3.
michael@0:     CheckObjectCoercible(this);
michael@0:     var S = ToString(this);
michael@0: 
michael@0:     // Steps 4-5.
michael@0:     var position = ToInteger(pos);
michael@0: 
michael@0:     // Step 6.
michael@0:     var size = S.length;
michael@0: 
michael@0:     // Step 7.
michael@0:     if (position < 0 || position >= size)
michael@0:         return undefined;
michael@0: 
michael@0:     // Steps 8-9.
michael@0:     var first = callFunction(std_String_charCodeAt, S, position);
michael@0:     if (first < 0xD800 || first > 0xDBFF || position + 1 === size)
michael@0:         return first;
michael@0: 
michael@0:     // Steps 10-11.
michael@0:     var second = callFunction(std_String_charCodeAt, S, position + 1);
michael@0:     if (second < 0xDC00 || second > 0xDFFF)
michael@0:         return first;
michael@0: 
michael@0:     // Step 12.
michael@0:     return (first - 0xD800) * 0x400 + (second - 0xDC00) + 0x10000;
michael@0: }
michael@0: 
michael@0: var collatorCache = new Record();
michael@0: 
michael@0: /* ES6 20121122 draft 15.5.4.21. */
michael@0: function String_repeat(count) {
michael@0:     // Steps 1-3.
michael@0:     CheckObjectCoercible(this);
michael@0:     var S = ToString(this);
michael@0: 
michael@0:     // Steps 4-5.
michael@0:     var n = ToInteger(count);
michael@0: 
michael@0:     // Steps 6-7.
michael@0:     if (n < 0)
michael@0:         ThrowError(JSMSG_NEGATIVE_REPETITION_COUNT); // a RangeError
michael@0: 
michael@0:     if (!(n * S.length < (1 << 28)))
michael@0:         ThrowError(JSMSG_RESULTING_STRING_TOO_LARGE); // a RangeError
michael@0: 
michael@0:     // Communicate |n|'s possible range to the compiler.
michael@0:     n = n & ((1 << 28) - 1);
michael@0: 
michael@0:     // Steps 8-9.
michael@0:     var T = "";
michael@0:     for (;;) {
michael@0:         if (n & 1)
michael@0:             T += S;
michael@0:         n >>= 1;
michael@0:         if (n)
michael@0:             S += S;
michael@0:         else
michael@0:             break;
michael@0:     }
michael@0:     return T;
michael@0: }
michael@0: 
michael@0: #define STRING_ITERATOR_SLOT_ITERATED_OBJECT 0
michael@0: #define STRING_ITERATOR_SLOT_NEXT_INDEX 1
michael@0: 
michael@0: // ES6 draft specification, section 21.1.3.27, version 2013-09-27.
michael@0: function String_iterator() {
michael@0:     CheckObjectCoercible(this);
michael@0:     var S = ToString(this);
michael@0:     var iterator = NewStringIterator();
michael@0:     UnsafeSetReservedSlot(iterator, STRING_ITERATOR_SLOT_ITERATED_OBJECT, S);
michael@0:     UnsafeSetReservedSlot(iterator, STRING_ITERATOR_SLOT_NEXT_INDEX, 0);
michael@0:     return iterator;
michael@0: }
michael@0: 
michael@0: function StringIteratorIdentity() {
michael@0:     return this;
michael@0: }
michael@0: 
michael@0: function StringIteratorNext() {
michael@0:     // FIXME: Cross-compartment wrapper StringIterator objects should pass this test.  Bug 924059.
michael@0:     if (!IsObject(this) || !IsStringIterator(this))
michael@0:         ThrowError(JSMSG_INCOMPATIBLE_METHOD, "StringIterator", "next", ToString(this));
michael@0: 
michael@0:     var S = UnsafeGetReservedSlot(this, STRING_ITERATOR_SLOT_ITERATED_OBJECT);
michael@0:     var index = UnsafeGetReservedSlot(this, STRING_ITERATOR_SLOT_NEXT_INDEX);
michael@0:     var size = S.length;
michael@0: 
michael@0:     if (index >= size) {
michael@0:         return { value: undefined, done: true };
michael@0:     }
michael@0: 
michael@0:     var charCount = 1;
michael@0:     var first = callFunction(std_String_charCodeAt, S, index);
michael@0:     if (first >= 0xD800 && first <= 0xDBFF && index + 1 < size) {
michael@0:         var second = callFunction(std_String_charCodeAt, S, index + 1);
michael@0:         if (second >= 0xDC00 && second <= 0xDFFF) {
michael@0:             charCount = 2;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     UnsafeSetReservedSlot(this, STRING_ITERATOR_SLOT_NEXT_INDEX, index + charCount);
michael@0:     var value = callFunction(std_String_substring, S, index, index + charCount);
michael@0: 
michael@0:     return { value: value, done: false };
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Compare this String against that String, using the locale and collation
michael@0:  * options provided.
michael@0:  *
michael@0:  * Spec: ECMAScript Internationalization API Specification, 13.1.1.
michael@0:  */
michael@0: function String_localeCompare(that) {
michael@0:     // Steps 1-3.
michael@0:     CheckObjectCoercible(this);
michael@0:     var S = ToString(this);
michael@0:     var That = ToString(that);
michael@0: 
michael@0:     // Steps 4-5.
michael@0:     var locales = arguments.length > 1 ? arguments[1] : undefined;
michael@0:     var options = arguments.length > 2 ? arguments[2] : undefined;
michael@0: 
michael@0:     // Step 6.
michael@0:     var collator;
michael@0:     if (locales === undefined && options === undefined) {
michael@0:         // This cache only optimizes for the old ES5 localeCompare without
michael@0:         // locales and options.
michael@0:         if (collatorCache.collator === undefined)
michael@0:             collatorCache.collator = intl_Collator(locales, options);
michael@0:         collator = collatorCache.collator;
michael@0:     } else {
michael@0:         collator = intl_Collator(locales, options);
michael@0:     }
michael@0: 
michael@0:     // Step 7.
michael@0:     return intl_CompareStrings(collator, S, That);
michael@0: }
michael@0: 
michael@0: /* ES6 Draft September 5, 2013 21.1.2.2 */
michael@0: function String_static_fromCodePoint() {
michael@0:     // Step 1. is not relevant
michael@0:     // Step 2.
michael@0:     var length = arguments.length;
michael@0: 
michael@0:     // Step 3.
michael@0:     var elements = new List();
michael@0: 
michael@0:     // Step 4-5., 5g.
michael@0:     for (var nextIndex = 0; nextIndex < length; nextIndex++) {
michael@0:         // Step 5a.
michael@0:         var next = arguments[nextIndex];
michael@0:         // Step 5b-c.
michael@0:         var nextCP = ToNumber(next);
michael@0: 
michael@0:         // Step 5d.
michael@0:         if (nextCP !== ToInteger(nextCP) || std_isNaN(nextCP))
michael@0:             ThrowError(JSMSG_NOT_A_CODEPOINT, ToString(nextCP));
michael@0: 
michael@0:         // Step 5e.
michael@0:         if (nextCP < 0 || nextCP > 0x10FFFF)
michael@0:             ThrowError(JSMSG_NOT_A_CODEPOINT, ToString(nextCP));
michael@0: 
michael@0:         // Step 5f.
michael@0:         // Inlined UTF-16 Encoding
michael@0:         if (nextCP <= 0xFFFF) {
michael@0:             elements.push(nextCP);
michael@0:             continue;
michael@0:         }
michael@0: 
michael@0:         elements.push((((nextCP - 0x10000) / 0x400) | 0) + 0xD800);
michael@0:         elements.push((nextCP - 0x10000) % 0x400 + 0xDC00);
michael@0:     }
michael@0: 
michael@0:     // Step 6.
michael@0:     return callFunction(std_Function_apply, std_String_fromCharCode, null, elements);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Compare String str1 against String str2, using the locale and collation
michael@0:  * options provided.
michael@0:  *
michael@0:  * Mozilla proprietary.
michael@0:  * Spec: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/String#String_generic_methods
michael@0:  */
michael@0: function String_static_localeCompare(str1, str2) {
michael@0:     if (arguments.length < 1)
michael@0:         ThrowError(JSMSG_MISSING_FUN_ARG, 0, "String.localeCompare");
michael@0:     var locales = arguments.length > 2 ? arguments[2] : undefined;
michael@0:     var options = arguments.length > 3 ? arguments[3] : undefined;
michael@0:     return callFunction(String_localeCompare, str1, str2, locales, options);
michael@0: }
michael@0: