mfbt/decimal/moz-decimal-utils.h@7e26c7da4463 (annotated)
mfbt/decimal/moz-decimal-utils.h
Wed, 31 Dec 2014 06:55:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:50 +0100
- changeset 2
- 7e26c7da4463
- permissions
- -rw-r--r--
Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef MOZ_DECIMAL_UTILS_H |
| michael@0 | 7 | #define MOZ_DECIMAL_UTILS_H |
| michael@0 | 8 | |
| michael@0 | 9 | // This file contains extra includes, defines and typedefs to allow compilation |
| michael@0 | 10 | // of Decimal.cpp under the Mozilla source without blink core dependencies. Do |
| michael@0 | 11 | // not include it into any file other than Decimal.cpp. |
| michael@0 | 12 | |
| michael@0 | 13 | #include "../double-conversion/double-conversion.h" |
| michael@0 | 14 | #include "mozilla/ArrayUtils.h" |
| michael@0 | 15 | #include "mozilla/Casting.h" |
| michael@0 | 16 | #include "mozilla/FloatingPoint.h" |
| michael@0 | 17 | #include "mozilla/NullPtr.h" |
| michael@0 | 18 | |
| michael@0 | 19 | #include <cmath> |
| michael@0 | 20 | #include <cstring> |
| michael@0 | 21 | #include <iomanip> |
| michael@0 | 22 | #include <limits> |
| michael@0 | 23 | #include <sstream> |
| michael@0 | 24 | |
| michael@0 | 25 | #ifndef UINT64_C |
| michael@0 | 26 | // For Android toolchain |
| michael@0 | 27 | #define UINT64_C(c) (c ## ULL) |
| michael@0 | 28 | #endif |
| michael@0 | 29 | |
| michael@0 | 30 | #ifdef ASSERT |
| michael@0 | 31 | #undef ASSERT |
| michael@0 | 32 | #endif |
| michael@0 | 33 | #define ASSERT MOZ_ASSERT |
| michael@0 | 34 | |
| michael@0 | 35 | #define ASSERT_NOT_REACHED() MOZ_ASSUME_UNREACHABLE("moz-decimal-utils.h") |
| michael@0 | 36 | |
| michael@0 | 37 | #define WTF_MAKE_NONCOPYABLE(ClassName) \ |
| michael@0 | 38 | private: \ |
| michael@0 | 39 | ClassName(const ClassName&) MOZ_DELETE; \ |
| michael@0 | 40 | void operator=(const ClassName&) MOZ_DELETE; |
| michael@0 | 41 | |
| michael@0 | 42 | #if defined(_MSC_VER) |
| michael@0 | 43 | namespace std { |
| michael@0 | 44 | inline bool isinf(double num) { return mozilla::IsInfinite(num); } |
| michael@0 | 45 | inline bool isnan(double num) { return mozilla::IsNaN(num); } |
| michael@0 | 46 | inline bool isfinite(double num) { return mozilla::IsFinite(num); } |
| michael@0 | 47 | } |
| michael@0 | 48 | #endif |
| michael@0 | 49 | |
| michael@0 | 50 | typedef std::string String; |
| michael@0 | 51 | |
| michael@0 | 52 | double mozToDouble(const String &aStr, bool *valid) { |
| michael@0 | 53 | double_conversion::StringToDoubleConverter converter( |
| michael@0 | 54 | double_conversion::StringToDoubleConverter::NO_FLAGS, |
| michael@0 | 55 | mozilla::UnspecifiedNaN<double>(), mozilla::UnspecifiedNaN<double>(), nullptr, nullptr); |
| michael@0 | 56 | const char* str = aStr.c_str(); |
| michael@0 | 57 | int length = mozilla::SafeCast<int>(strlen(str)); |
| michael@0 | 58 | int processed_char_count; // unused - NO_FLAGS requires the whole string to parse |
| michael@0 | 59 | double result = converter.StringToDouble(str, length, &processed_char_count); |
| michael@0 | 60 | *valid = mozilla::IsFinite(result); |
| michael@0 | 61 | return result; |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | String mozToString(double aNum) { |
| michael@0 | 65 | char buffer[64]; |
| michael@0 | 66 | int buffer_length = mozilla::ArrayLength(buffer); |
| michael@0 | 67 | const double_conversion::DoubleToStringConverter& converter = |
| michael@0 | 68 | double_conversion::DoubleToStringConverter::EcmaScriptConverter(); |
| michael@0 | 69 | double_conversion::StringBuilder builder(buffer, buffer_length); |
| michael@0 | 70 | converter.ToShortest(aNum, &builder); |
| michael@0 | 71 | return String(builder.Finalize()); |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | String mozToString(int64_t aNum) { |
| michael@0 | 75 | std::ostringstream o; |
| michael@0 | 76 | o << std::setprecision(std::numeric_limits<int64_t>::digits10) << aNum; |
| michael@0 | 77 | return o.str(); |
| michael@0 | 78 | } |
| michael@0 | 79 | |
| michael@0 | 80 | String mozToString(uint64_t aNum) { |
| michael@0 | 81 | std::ostringstream o; |
| michael@0 | 82 | o << std::setprecision(std::numeric_limits<uint64_t>::digits10) << aNum; |
| michael@0 | 83 | return o.str(); |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | namespace moz_decimal_utils { |
| michael@0 | 87 | |
| michael@0 | 88 | class StringBuilder |
| michael@0 | 89 | { |
| michael@0 | 90 | public: |
| michael@0 | 91 | void append(char c) { |
| michael@0 | 92 | mStr += c; |
| michael@0 | 93 | } |
| michael@0 | 94 | void appendLiteral(const char *aStr) { |
| michael@0 | 95 | mStr += aStr; |
| michael@0 | 96 | } |
| michael@0 | 97 | void appendNumber(int aNum) { |
| michael@0 | 98 | mStr += mozToString(int64_t(aNum)); |
| michael@0 | 99 | } |
| michael@0 | 100 | void append(const String& aStr) { |
| michael@0 | 101 | mStr += aStr; |
| michael@0 | 102 | } |
| michael@0 | 103 | std::string toString() const { |
| michael@0 | 104 | return mStr; |
| michael@0 | 105 | } |
| michael@0 | 106 | private: |
| michael@0 | 107 | std::string mStr; |
| michael@0 | 108 | }; |
| michael@0 | 109 | |
| michael@0 | 110 | } // namespace moz-decimal-utils |
| michael@0 | 111 | |
| michael@0 | 112 | #endif |
| michael@0 | 113 |
