1// Copyright 2010 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#ifndef V8_FIXED_DTOA_H_ 29#define V8_FIXED_DTOA_H_ 30 31namespace v8 { 32namespace internal { 33 34// Produces digits necessary to print a given number with 35// 'fractional_count' digits after the decimal point. 36// The buffer must be big enough to hold the result plus one terminating null 37// character. 38// 39// The produced digits might be too short in which case the caller has to fill 40// the gaps with '0's. 41// Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and 42// decimal_point = -2. 43// Halfway cases are rounded towards +/-Infinity (away from 0). The call 44// FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. 45// The returned buffer may contain digits that would be truncated from the 46// shortest representation of the input. 47// 48// This method only works for some parameters. If it can't handle the input it 49// returns false. The output is null-terminated when the function succeeds. 50bool FastFixedDtoa(double v, int fractional_count, 51 Vector<char> buffer, int* length, int* decimal_point); 52 53} } // namespace v8::internal 54 55#endif // V8_FIXED_DTOA_H_ 56