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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 // 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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| 27 | 27 |
| 28 #ifndef DOUBLE_CONVERSION_FIXED_DTOA_H_ | 28 #ifndef DOUBLE_CONVERSION_FIXED_DTOA_H_ |
| 29 #define DOUBLE_CONVERSION_FIXED_DTOA_H_ | 29 #define DOUBLE_CONVERSION_FIXED_DTOA_H_ |
| 30 | 30 |
| 31 #include "utils.h" | 31 #include "utils.h" |
| 32 | 32 |
| 33 namespace WTF { | 33 namespace WTF { |
| 34 | 34 |
| 35 namespace double_conversion { | 35 namespace double_conversion { |
| 36 | 36 |
| 37 // Produces digits necessary to print a given number with | 37 // Produces digits necessary to print a given number with |
| 38 // 'fractional_count' digits after the decimal point. | 38 // 'fractional_count' digits after the decimal point. |
| 39 // The buffer must be big enough to hold the result plus one terminating nul
l | 39 // The buffer must be big enough to hold the result plus one terminating null |
| 40 // character. | 40 // character. |
| 41 // | 41 // |
| 42 // The produced digits might be too short in which case the caller has to fi
ll | 42 // The produced digits might be too short in which case the caller has to fill |
| 43 // the gaps with '0's. | 43 // the gaps with '0's. |
| 44 // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1",
and | 44 // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and |
| 45 // decimal_point = -2. | 45 // decimal_point = -2. |
| 46 // Halfway cases are rounded towards +/-Infinity (away from 0). The call | 46 // Halfway cases are rounded towards +/-Infinity (away from 0). The call |
| 47 // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. | 47 // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. |
| 48 // The returned buffer may contain digits that would be truncated from the | 48 // The returned buffer may contain digits that would be truncated from the |
| 49 // shortest representation of the input. | 49 // shortest representation of the input. |
| 50 // | 50 // |
| 51 // This method only works for some parameters. If it can't handle the input
it | 51 // This method only works for some parameters. If it can't handle the input it |
| 52 // returns false. The output is null-terminated when the function succeeds. | 52 // returns false. The output is null-terminated when the function succeeds. |
| 53 bool FastFixedDtoa(double v, int fractional_count, | 53 bool FastFixedDtoa(double v, |
| 54 Vector<char> buffer, int* length, int* decimal_point); | 54 int fractional_count, |
| 55 Vector<char> buffer, |
| 56 int* length, |
| 57 int* decimal_point); |
| 55 | 58 |
| 56 } // namespace double_conversion | 59 } // namespace double_conversion |
| 57 | 60 |
| 58 } // namespace WTF | 61 } // namespace WTF |
| 59 | 62 |
| 60 #endif // DOUBLE_CONVERSION_FIXED_DTOA_H_ | 63 #endif // DOUBLE_CONVERSION_FIXED_DTOA_H_ |
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