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Issue 2764243002: Move files in wtf/ to platform/wtf/ (Part 9). (Closed)
Patch Set: Rebase. Created 3 years, 9 months ago
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1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2017 The Chromium Authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Use of this source code is governed by a BSD-style license that can be
3 // modification, are permitted provided that the following conditions are 3 // found in the LICENSE file.
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 4
28 #ifndef DOUBLE_CONVERSION_CACHED_POWERS_H_ 5 #include "platform/wtf/dtoa/cached-powers.h"
29 #define DOUBLE_CONVERSION_CACHED_POWERS_H_
30 6
31 #include "diy-fp.h" 7 // The contents of this header was moved to platform/wtf as part of
32 8 // WTF migration project. See the following post for details:
33 namespace WTF { 9 // https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gY CAAJ
34
35 namespace double_conversion {
36
37 class PowersOfTenCache {
38 public:
39 // Not all powers of ten are cached. The decimal exponent of two neighboring
40 // cached numbers will differ by kDecimalExponentDistance.
41 static const int kDecimalExponentDistance;
42
43 static const int kMinDecimalExponent;
44 static const int kMaxDecimalExponent;
45
46 // Returns a cached power-of-ten with a binary exponent in the range
47 // [min_exponent; max_exponent] (boundaries included).
48 static void GetCachedPowerForBinaryExponentRange(int min_exponent,
49 int max_exponent,
50 DiyFp* power,
51 int* decimal_exponent);
52
53 // Returns a cached power of ten x ~= 10^k such that
54 // k <= decimal_exponent < k + kCachedPowersDecimalDistance.
55 // The given decimal_exponent must satisfy
56 // kMinDecimalExponent <= requested_exponent, and
57 // requested_exponent < kMaxDecimalExponent + kDecimalExponentDistance.
58 static void GetCachedPowerForDecimalExponent(int requested_exponent,
59 DiyFp* power,
60 int* found_exponent);
61 };
62 } // namespace double_conversion
63
64 } // namespace WTF
65
66 #endif // DOUBLE_CONVERSION_CACHED_POWERS_H_
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