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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 "use strict"; | 28 "use strict"; |
29 | 29 |
30 var $ArrayBuffer = global.ArrayBuffer; | 30 var $ArrayBuffer = global.ArrayBuffer; |
31 | 31 |
32 // ------------------------------------------------------------------- | 32 // ------------------------------------------------------------------- |
33 | 33 |
34 function ArrayBufferConstructor(byteLength) { // length = 1 | 34 function ArrayBufferConstructor(length) { // length = 1 |
35 if (%_IsConstructCall()) { | 35 if (%_IsConstructCall()) { |
36 var l = TO_POSITIVE_INTEGER(byteLength); | 36 var byteLength = ToPositiveInteger(length, 'invalid_array_buffer_length'); |
37 %ArrayBufferInitialize(this, l); | 37 %ArrayBufferInitialize(this, byteLength); |
38 } else { | 38 } else { |
39 return new $ArrayBuffer(byteLength); | 39 return new $ArrayBuffer(length); |
40 } | 40 } |
41 } | 41 } |
42 | 42 |
43 function ArrayBufferGetByteLength() { | 43 function ArrayBufferGetByteLength() { |
44 if (!IS_ARRAYBUFFER(this)) { | 44 if (!IS_ARRAYBUFFER(this)) { |
45 throw MakeTypeError('incompatible_method_receiver', | 45 throw MakeTypeError('incompatible_method_receiver', |
46 ['ArrayBuffer.prototype.byteLength', this]); | 46 ['ArrayBuffer.prototype.byteLength', this]); |
47 } | 47 } |
48 return %ArrayBufferGetByteLength(this); | 48 return %ArrayBufferGetByteLength(this); |
49 } | 49 } |
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63 first = MathMin(relativeStart, this.byteLength); | 63 first = MathMin(relativeStart, this.byteLength); |
64 } | 64 } |
65 var relativeEnd = IS_UNDEFINED(end) ? this.byteLength : TO_INTEGER(end); | 65 var relativeEnd = IS_UNDEFINED(end) ? this.byteLength : TO_INTEGER(end); |
66 var fin; | 66 var fin; |
67 if (relativeEnd < 0) { | 67 if (relativeEnd < 0) { |
68 fin = MathMax(this.byteLength + relativeEnd, 0); | 68 fin = MathMax(this.byteLength + relativeEnd, 0); |
69 } else { | 69 } else { |
70 fin = MathMin(relativeEnd, this.byteLength); | 70 fin = MathMin(relativeEnd, this.byteLength); |
71 } | 71 } |
72 | 72 |
| 73 if (fin < first) { |
| 74 fin = first; |
| 75 } |
73 var newLen = fin - first; | 76 var newLen = fin - first; |
74 // TODO(dslomov): implement inheritance | 77 // TODO(dslomov): implement inheritance |
75 var result = new $ArrayBuffer(newLen); | 78 var result = new $ArrayBuffer(newLen); |
76 | 79 |
77 %ArrayBufferSliceImpl(this, result, first); | 80 %ArrayBufferSliceImpl(this, result, first); |
78 return result; | 81 return result; |
79 } | 82 } |
80 | 83 |
81 function SetUpArrayBuffer() { | 84 function SetUpArrayBuffer() { |
82 %CheckIsBootstrapping(); | 85 %CheckIsBootstrapping(); |
83 | 86 |
84 // Set up the ArrayBuffer constructor function. | 87 // Set up the ArrayBuffer constructor function. |
85 %SetCode($ArrayBuffer, ArrayBufferConstructor); | 88 %SetCode($ArrayBuffer, ArrayBufferConstructor); |
86 %FunctionSetPrototype($ArrayBuffer, new $Object()); | 89 %FunctionSetPrototype($ArrayBuffer, new $Object()); |
87 | 90 |
88 // Set up the constructor property on the ArrayBuffer prototype object. | 91 // Set up the constructor property on the ArrayBuffer prototype object. |
89 %SetProperty($ArrayBuffer.prototype, "constructor", $ArrayBuffer, DONT_ENUM); | 92 %SetProperty($ArrayBuffer.prototype, "constructor", $ArrayBuffer, DONT_ENUM); |
90 | 93 |
91 InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength); | 94 InstallGetter($ArrayBuffer.prototype, "byteLength", ArrayBufferGetByteLength); |
92 | 95 |
93 InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array( | 96 InstallFunctions($ArrayBuffer.prototype, DONT_ENUM, $Array( |
94 "slice", ArrayBufferSlice | 97 "slice", ArrayBufferSlice |
95 )); | 98 )); |
96 } | 99 } |
97 | 100 |
98 SetUpArrayBuffer(); | 101 SetUpArrayBuffer(); |
99 | 102 |
100 | 103 |
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