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_FIXED_DTOA_H_
6#define V8_FIXED_DTOA_H_
7
8namespace v8 {
9namespace internal {
10
11// Produces digits necessary to print a given number with
12// 'fractional_count' digits after the decimal point.
13// The buffer must be big enough to hold the result plus one terminating null
14// character.
15//
16// The produced digits might be too short in which case the caller has to fill
17// the gaps with '0's.
18// Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and
19// decimal_point = -2.
20// Halfway cases are rounded towards +/-Infinity (away from 0). The call
21// FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0.
22// The returned buffer may contain digits that would be truncated from the
23// shortest representation of the input.
24//
25// This method only works for some parameters. If it can't handle the input it
26// returns false. The output is null-terminated when the function succeeds.
27bool FastFixedDtoa(double v, int fractional_count,
28                   Vector<char> buffer, int* length, int* decimal_point);
29
30} }  // namespace v8::internal
31
32#endif  // V8_FIXED_DTOA_H_
33