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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
11 // with the distribution. | 11 // with the distribution. |
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27 | 27 |
28 'use strict'; | 28 'use strict'; |
29 | 29 |
30 // This file relies on the fact that the following declaration has been made | 30 // This file relies on the fact that the following declaration has been made |
31 // in runtime.js: | 31 // in runtime.js: |
32 // var $String = global.String; | 32 // var $String = global.String; |
33 // var $Array = global.Array; | 33 // var $Array = global.Array; |
34 | 34 |
35 // ------------------------------------------------------------------- | 35 // ------------------------------------------------------------------- |
36 | 36 |
37 // ES6 draft 07-15-13, section 15.5.3.21 | 37 // ES6 draft 01-20-14, section 21.1.3.13 |
38 function StringRepeat(count) { | 38 function StringRepeat(count) { |
39 if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) { | 39 CHECK_OBJECT_COERCIBLE(this, "String.prototype.repeat"); |
40 throw MakeTypeError("called_on_null_or_undefined", | |
41 ["String.prototype.repeat"]); | |
42 } | |
43 | 40 |
44 var s = TO_STRING_INLINE(this); | 41 var s = TO_STRING_INLINE(this); |
45 var n = ToInteger(count); | 42 var n = ToInteger(count); |
46 if (n < 0 || !NUMBER_IS_FINITE(n)) { | 43 if (n < 0 || !NUMBER_IS_FINITE(n)) { |
47 throw MakeRangeError("invalid_count_value", []); | 44 throw MakeRangeError("invalid_count_value", []); |
48 } | 45 } |
49 | 46 |
50 var elements = new InternalArray(n); | 47 var elements = new InternalArray(n); |
51 for (var i = 0; i < n; i++) { | 48 for (var i = 0; i < n; i++) { |
52 elements[i] = s; | 49 elements[i] = s; |
53 } | 50 } |
54 | 51 |
55 return %StringBuilderConcat(elements, n, ""); | 52 return %StringBuilderConcat(elements, n, ""); |
56 } | 53 } |
57 | 54 |
58 | 55 |
59 // ES6 draft 07-15-13, section 15.5.3.22 | 56 // ES6 draft 01-20-14, section 21.1.3.18 |
60 function StringStartsWith(searchString /* position */) { // length == 1 | 57 function StringStartsWith(searchString /* position */) { // length == 1 |
61 if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) { | 58 CHECK_OBJECT_COERCIBLE(this, "String.prototype.startsWith"); |
62 throw MakeTypeError("called_on_null_or_undefined", | 59 |
| 60 var s = TO_STRING_INLINE(this); |
| 61 |
| 62 if (IS_REGEXP(searchString)) { |
| 63 throw MakeTypeError("first_argument_not_regexp", |
63 ["String.prototype.startsWith"]); | 64 ["String.prototype.startsWith"]); |
64 } | 65 } |
65 | 66 |
66 var s = TO_STRING_INLINE(this); | |
67 var ss = TO_STRING_INLINE(searchString); | 67 var ss = TO_STRING_INLINE(searchString); |
68 var pos = 0; | 68 var pos = 0; |
69 if (%_ArgumentsLength() > 1) { | 69 if (%_ArgumentsLength() > 1) { |
70 pos = %_Arguments(1); // position | 70 pos = %_Arguments(1); // position |
71 pos = ToInteger(pos); | 71 pos = ToInteger(pos); |
72 } | 72 } |
73 | 73 |
74 var s_len = s.length; | 74 var s_len = s.length; |
75 var start = MathMin(MathMax(pos, 0), s_len); | 75 var start = MathMin(MathMax(pos, 0), s_len); |
76 var ss_len = ss.length; | 76 var ss_len = ss.length; |
77 if (ss_len + start > s_len) { | 77 if (ss_len + start > s_len) { |
78 return false; | 78 return false; |
79 } | 79 } |
80 | 80 |
81 return %StringIndexOf(s, ss, start) === start; | 81 return %StringIndexOf(s, ss, start) === start; |
82 } | 82 } |
83 | 83 |
84 | 84 |
85 // ES6 draft 07-15-13, section 15.5.3.23 | 85 // ES6 draft 01-20-14, section 21.1.3.7 |
86 function StringEndsWith(searchString /* position */) { // length == 1 | 86 function StringEndsWith(searchString /* position */) { // length == 1 |
87 if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) { | 87 CHECK_OBJECT_COERCIBLE(this, "String.prototype.endsWith"); |
88 throw MakeTypeError("called_on_null_or_undefined", | 88 |
| 89 var s = TO_STRING_INLINE(this); |
| 90 |
| 91 if (IS_REGEXP(searchString)) { |
| 92 throw MakeTypeError("first_argument_not_regexp", |
89 ["String.prototype.endsWith"]); | 93 ["String.prototype.endsWith"]); |
90 } | 94 } |
91 | 95 |
92 var s = TO_STRING_INLINE(this); | |
93 var ss = TO_STRING_INLINE(searchString); | 96 var ss = TO_STRING_INLINE(searchString); |
94 var s_len = s.length; | 97 var s_len = s.length; |
95 var pos = s_len; | 98 var pos = s_len; |
96 if (%_ArgumentsLength() > 1) { | 99 if (%_ArgumentsLength() > 1) { |
97 var arg = %_Arguments(1); // position | 100 var arg = %_Arguments(1); // position |
98 if (!IS_UNDEFINED(arg)) { | 101 if (!IS_UNDEFINED(arg)) { |
99 pos = ToInteger(arg); | 102 pos = ToInteger(arg); |
100 } | 103 } |
101 } | 104 } |
102 | 105 |
103 var end = MathMin(MathMax(pos, 0), s_len); | 106 var end = MathMin(MathMax(pos, 0), s_len); |
104 var ss_len = ss.length; | 107 var ss_len = ss.length; |
105 var start = end - ss_len; | 108 var start = end - ss_len; |
106 if (start < 0) { | 109 if (start < 0) { |
107 return false; | 110 return false; |
108 } | 111 } |
109 | 112 |
110 return %StringLastIndexOf(s, ss, start) === start; | 113 return %StringLastIndexOf(s, ss, start) === start; |
111 } | 114 } |
112 | 115 |
113 | 116 |
114 // ES6 draft 07-15-13, section 15.5.3.24 | 117 // ES6 draft 01-20-14, section 21.1.3.6 |
115 function StringContains(searchString /* position */) { // length == 1 | 118 function StringContains(searchString /* position */) { // length == 1 |
116 if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) { | 119 CHECK_OBJECT_COERCIBLE(this, "String.prototype.contains"); |
117 throw MakeTypeError("called_on_null_or_undefined", | |
118 ["String.prototype.contains"]); | |
119 } | |
120 | 120 |
121 var s = TO_STRING_INLINE(this); | 121 var s = TO_STRING_INLINE(this); |
122 var ss = TO_STRING_INLINE(searchString); | 122 var ss = TO_STRING_INLINE(searchString); |
123 var pos = 0; | 123 var pos = 0; |
124 if (%_ArgumentsLength() > 1) { | 124 if (%_ArgumentsLength() > 1) { |
125 pos = %_Arguments(1); // position | 125 pos = %_Arguments(1); // position |
126 pos = ToInteger(pos); | 126 pos = ToInteger(pos); |
127 } | 127 } |
128 | 128 |
129 var s_len = s.length; | 129 var s_len = s.length; |
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145 // Set up the non-enumerable functions on the String prototype object. | 145 // Set up the non-enumerable functions on the String prototype object. |
146 InstallFunctions($String.prototype, DONT_ENUM, $Array( | 146 InstallFunctions($String.prototype, DONT_ENUM, $Array( |
147 "repeat", StringRepeat, | 147 "repeat", StringRepeat, |
148 "startsWith", StringStartsWith, | 148 "startsWith", StringStartsWith, |
149 "endsWith", StringEndsWith, | 149 "endsWith", StringEndsWith, |
150 "contains", StringContains | 150 "contains", StringContains |
151 )); | 151 )); |
152 } | 152 } |
153 | 153 |
154 ExtendStringPrototype(); | 154 ExtendStringPrototype(); |
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