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1 // Copyright 2014 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 |
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46 | 46 |
47 var elements = new InternalArray(n); | 47 var elements = new InternalArray(n); |
48 for (var i = 0; i < n; i++) { | 48 for (var i = 0; i < n; i++) { |
49 elements[i] = s; | 49 elements[i] = s; |
50 } | 50 } |
51 | 51 |
52 return %StringBuilderConcat(elements, n, ""); | 52 return %StringBuilderConcat(elements, n, ""); |
53 } | 53 } |
54 | 54 |
55 | 55 |
56 // ES6 draft 01-20-14, section 21.1.3.18 | 56 // ES6 draft 04-05-14, section 21.1.3.18 |
57 function StringStartsWith(searchString /* position */) { // length == 1 | 57 function StringStartsWith(searchString /* position */) { // length == 1 |
58 CHECK_OBJECT_COERCIBLE(this, "String.prototype.startsWith"); | 58 CHECK_OBJECT_COERCIBLE(this, "String.prototype.startsWith"); |
59 | 59 |
60 var s = TO_STRING_INLINE(this); | 60 var s = TO_STRING_INLINE(this); |
61 | 61 |
62 if (IS_REGEXP(searchString)) { | 62 if (IS_REGEXP(searchString)) { |
63 throw MakeTypeError("first_argument_not_regexp", | 63 throw MakeTypeError("first_argument_not_regexp", |
64 ["String.prototype.startsWith"]); | 64 ["String.prototype.startsWith"]); |
65 } | 65 } |
66 | 66 |
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 01-20-14, section 21.1.3.7 | 85 // ES6 draft 04-05-14, section 21.1.3.7 |
86 function StringEndsWith(searchString /* position */) { // length == 1 | 86 function StringEndsWith(searchString /* position */) { // length == 1 |
87 CHECK_OBJECT_COERCIBLE(this, "String.prototype.endsWith"); | 87 CHECK_OBJECT_COERCIBLE(this, "String.prototype.endsWith"); |
88 | 88 |
89 var s = TO_STRING_INLINE(this); | 89 var s = TO_STRING_INLINE(this); |
90 | 90 |
91 if (IS_REGEXP(searchString)) { | 91 if (IS_REGEXP(searchString)) { |
92 throw MakeTypeError("first_argument_not_regexp", | 92 throw MakeTypeError("first_argument_not_regexp", |
93 ["String.prototype.endsWith"]); | 93 ["String.prototype.endsWith"]); |
94 } | 94 } |
95 | 95 |
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107 var ss_len = ss.length; | 107 var ss_len = ss.length; |
108 var start = end - ss_len; | 108 var start = end - ss_len; |
109 if (start < 0) { | 109 if (start < 0) { |
110 return false; | 110 return false; |
111 } | 111 } |
112 | 112 |
113 return %StringLastIndexOf(s, ss, start) === start; | 113 return %StringLastIndexOf(s, ss, start) === start; |
114 } | 114 } |
115 | 115 |
116 | 116 |
117 // ES6 draft 01-20-14, section 21.1.3.6 | 117 // ES6 draft 04-05-14, section 21.1.3.6 |
118 function StringContains(searchString /* position */) { // length == 1 | 118 function StringContains(searchString /* position */) { // length == 1 |
119 CHECK_OBJECT_COERCIBLE(this, "String.prototype.contains"); | 119 CHECK_OBJECT_COERCIBLE(this, "String.prototype.contains"); |
120 | 120 |
121 var s = TO_STRING_INLINE(this); | 121 var s = TO_STRING_INLINE(this); |
| 122 |
| 123 if (IS_REGEXP(searchString)) { |
| 124 throw MakeTypeError("first_argument_not_regexp", |
| 125 ["String.prototype.contains"]); |
| 126 } |
| 127 |
122 var ss = TO_STRING_INLINE(searchString); | 128 var ss = TO_STRING_INLINE(searchString); |
123 var pos = 0; | 129 var pos = 0; |
124 if (%_ArgumentsLength() > 1) { | 130 if (%_ArgumentsLength() > 1) { |
125 pos = %_Arguments(1); // position | 131 pos = %_Arguments(1); // position |
126 pos = ToInteger(pos); | 132 pos = ToInteger(pos); |
127 } | 133 } |
128 | 134 |
129 var s_len = s.length; | 135 var s_len = s.length; |
130 var start = MathMin(MathMax(pos, 0), s_len); | 136 var start = MathMin(MathMax(pos, 0), s_len); |
131 var ss_len = ss.length; | 137 var ss_len = ss.length; |
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145 // Set up the non-enumerable functions on the String prototype object. | 151 // Set up the non-enumerable functions on the String prototype object. |
146 InstallFunctions($String.prototype, DONT_ENUM, $Array( | 152 InstallFunctions($String.prototype, DONT_ENUM, $Array( |
147 "repeat", StringRepeat, | 153 "repeat", StringRepeat, |
148 "startsWith", StringStartsWith, | 154 "startsWith", StringStartsWith, |
149 "endsWith", StringEndsWith, | 155 "endsWith", StringEndsWith, |
150 "contains", StringContains | 156 "contains", StringContains |
151 )); | 157 )); |
152 } | 158 } |
153 | 159 |
154 ExtendStringPrototype(); | 160 ExtendStringPrototype(); |
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