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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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36 // result will be the most accurate number of this length. Longer | 36 // result will be the most accurate number of this length. Longer |
37 // representations might be more accurate. | 37 // representations might be more accurate. |
38 FAST_DTOA_SHORTEST, | 38 FAST_DTOA_SHORTEST, |
39 // Computes a representation where the precision (number of digits) is | 39 // Computes a representation where the precision (number of digits) is |
40 // given as input. The precision is independent of the decimal point. | 40 // given as input. The precision is independent of the decimal point. |
41 FAST_DTOA_PRECISION | 41 FAST_DTOA_PRECISION |
42 }; | 42 }; |
43 | 43 |
44 // FastDtoa will produce at most kFastDtoaMaximalLength digits. This does not | 44 // FastDtoa will produce at most kFastDtoaMaximalLength digits. This does not |
45 // include the terminating '\0' character. | 45 // include the terminating '\0' character. |
46 static const int kFastDtoaMaximalLength = 17; | 46 const int kFastDtoaMaximalLength = 17; |
47 | 47 |
48 // Provides a decimal representation of v. | 48 // Provides a decimal representation of v. |
49 // The result should be interpreted as buffer * 10^(point - length). | 49 // The result should be interpreted as buffer * 10^(point - length). |
50 // | 50 // |
51 // Precondition: | 51 // Precondition: |
52 // * v must be a strictly positive finite double. | 52 // * v must be a strictly positive finite double. |
53 // | 53 // |
54 // Returns true if it succeeds, otherwise the result can not be trusted. | 54 // Returns true if it succeeds, otherwise the result can not be trusted. |
55 // There will be *length digits inside the buffer followed by a null terminator. | 55 // There will be *length digits inside the buffer followed by a null terminator. |
56 // If the function returns true and mode equals | 56 // If the function returns true and mode equals |
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74 bool FastDtoa(double d, | 74 bool FastDtoa(double d, |
75 FastDtoaMode mode, | 75 FastDtoaMode mode, |
76 int requested_digits, | 76 int requested_digits, |
77 Vector<char> buffer, | 77 Vector<char> buffer, |
78 int* length, | 78 int* length, |
79 int* decimal_point); | 79 int* decimal_point); |
80 | 80 |
81 } } // namespace v8::internal | 81 } } // namespace v8::internal |
82 | 82 |
83 #endif // V8_FAST_DTOA_H_ | 83 #endif // V8_FAST_DTOA_H_ |
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