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 3 // found in the LICENSE file. 4 5 #ifndef V8_BASE_NUMBERS_FIXED_DTOA_H_ 6 #define V8_BASE_NUMBERS_FIXED_DTOA_H_ 7 8 #include "src/base/vector.h" 9 10 namespace v8 { 11 namespace base { 12 13 // Produces digits necessary to print a given number with 14 // 'fractional_count' digits after the decimal point. 15 // The buffer must be big enough to hold the result plus one terminating null 16 // character. 17 // 18 // The produced digits might be too short in which case the caller has to fill 19 // the gaps with '0's. 20 // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and 21 // decimal_point = -2. 22 // Halfway cases are rounded towards +/-Infinity (away from 0). The call 23 // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. 24 // The returned buffer may contain digits that would be truncated from the 25 // shortest representation of the input. 26 // 27 // This method only works for some parameters. If it can't handle the input it 28 // returns false. The output is null-terminated when the function succeeds. 29 V8_BASE_EXPORT bool FastFixedDtoa(double v, int fractional_count, 30 Vector<char> buffer, int* length, 31 int* decimal_point); 32 33 } // namespace base 34 } // namespace v8 35 36 #endif // V8_BASE_NUMBERS_FIXED_DTOA_H_ 37