| // Copyright 2010 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_FIXED_DTOA_H_ |
| #define V8_FIXED_DTOA_H_ |
| |
| #include "src/vector.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Produces digits necessary to print a given number with |
| // 'fractional_count' digits after the decimal point. |
| // The buffer must be big enough to hold the result plus one terminating null |
| // character. |
| // |
| // The produced digits might be too short in which case the caller has to fill |
| // the gaps with '0's. |
| // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and |
| // decimal_point = -2. |
| // Halfway cases are rounded towards +/-Infinity (away from 0). The call |
| // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. |
| // The returned buffer may contain digits that would be truncated from the |
| // shortest representation of the input. |
| // |
| // This method only works for some parameters. If it can't handle the input it |
| // returns false. The output is null-terminated when the function succeeds. |
| bool FastFixedDtoa(double v, int fractional_count, |
| Vector<char> buffer, int* length, int* decimal_point); |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_FIXED_DTOA_H_ |