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| 1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef V8_BIGNUM_H_ | 5 #ifndef V8_BIGNUM_H_ |
| 6 #define V8_BIGNUM_H_ | 6 #define V8_BIGNUM_H_ |
| 7 | 7 |
| 8 #include "src/vector.h" |
| 9 |
| 8 namespace v8 { | 10 namespace v8 { |
| 9 namespace internal { | 11 namespace internal { |
| 10 | 12 |
| 11 class Bignum { | 13 class Bignum { |
| 12 public: | 14 public: |
| 13 // 3584 = 128 * 28. We can represent 2^3584 > 10^1000 accurately. | 15 // 3584 = 128 * 28. We can represent 2^3584 > 10^1000 accurately. |
| 14 // This bignum can encode much bigger numbers, since it contains an | 16 // This bignum can encode much bigger numbers, since it contains an |
| 15 // exponent. | 17 // exponent. |
| 16 static const int kMaxSignificantBits = 3584; | 18 static const int kMaxSignificantBits = 3584; |
| 17 | 19 |
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| 109 int used_digits_; | 111 int used_digits_; |
| 110 // The Bignum's value equals value(bigits_) * 2^(exponent_ * kBigitSize). | 112 // The Bignum's value equals value(bigits_) * 2^(exponent_ * kBigitSize). |
| 111 int exponent_; | 113 int exponent_; |
| 112 | 114 |
| 113 DISALLOW_COPY_AND_ASSIGN(Bignum); | 115 DISALLOW_COPY_AND_ASSIGN(Bignum); |
| 114 }; | 116 }; |
| 115 | 117 |
| 116 } } // namespace v8::internal | 118 } } // namespace v8::internal |
| 117 | 119 |
| 118 #endif // V8_BIGNUM_H_ | 120 #endif // V8_BIGNUM_H_ |
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