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