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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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 #include <stdarg.h> | 5 #include <stdarg.h> |
6 #include <cmath> | 6 #include <cmath> |
7 | 7 |
8 #include "globals.h" | 8 #include "src/globals.h" |
9 #include "utils.h" | 9 #include "src/utils.h" |
10 #include "strtod.h" | 10 #include "src/strtod.h" |
11 #include "bignum.h" | 11 #include "src/bignum.h" |
12 #include "cached-powers.h" | 12 #include "src/cached-powers.h" |
13 #include "double.h" | 13 #include "src/double.h" |
14 | 14 |
15 namespace v8 { | 15 namespace v8 { |
16 namespace internal { | 16 namespace internal { |
17 | 17 |
18 // 2^53 = 9007199254740992. | 18 // 2^53 = 9007199254740992. |
19 // Any integer with at most 15 decimal digits will hence fit into a double | 19 // Any integer with at most 15 decimal digits will hence fit into a double |
20 // (which has a 53bit significand) without loss of precision. | 20 // (which has a 53bit significand) without loss of precision. |
21 static const int kMaxExactDoubleIntegerDecimalDigits = 15; | 21 static const int kMaxExactDoubleIntegerDecimalDigits = 15; |
22 // 2^64 = 18446744073709551616 > 10^19 | 22 // 2^64 = 18446744073709551616 > 10^19 |
23 static const int kMaxUint64DecimalDigits = 19; | 23 static const int kMaxUint64DecimalDigits = 19; |
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411 | 411 |
412 double guess; | 412 double guess; |
413 if (DoubleStrtod(trimmed, exponent, &guess) || | 413 if (DoubleStrtod(trimmed, exponent, &guess) || |
414 DiyFpStrtod(trimmed, exponent, &guess)) { | 414 DiyFpStrtod(trimmed, exponent, &guess)) { |
415 return guess; | 415 return guess; |
416 } | 416 } |
417 return BignumStrtod(trimmed, exponent, guess); | 417 return BignumStrtod(trimmed, exponent, guess); |
418 } | 418 } |
419 | 419 |
420 } } // namespace v8::internal | 420 } } // namespace v8::internal |
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