Home | History | Annotate | Download | only in src 
      1 // Copyright 2013 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_INTL_SUPPORT
      6 #error Internationalization is expected to be enabled.
      7 #endif  // V8_INTL_SUPPORT
      8 
      9 #ifndef V8_INTL_H_
     10 #define V8_INTL_H_
     11 
     12 #include <string>
     13 
     14 #include "src/base/timezone-cache.h"
     15 #include "src/objects.h"
     16 #include "src/objects/string.h"
     17 #include "unicode/uversion.h"
     18 
     19 namespace U_ICU_NAMESPACE {
     20 class TimeZone;
     21 }
     22 
     23 namespace v8 {
     24 namespace internal {
     25 
     26 enum class IcuService {
     27   kBreakIterator,
     28   kCollator,
     29   kDateFormat,
     30   kNumberFormat,
     31   kPluralRules,
     32   kResourceBundle,
     33   kRelativeDateTimeFormatter,
     34   kListFormatter
     35 };
     36 
     37 const UChar* GetUCharBufferFromFlat(const String::FlatContent& flat,
     38                                     std::unique_ptr<uc16[]>* dest,
     39                                     int32_t length);
     40 MaybeHandle<String> LocaleConvertCase(Handle<String> s, Isolate* isolate,
     41                                       bool is_to_upper, const char* lang);
     42 MaybeHandle<String> ConvertToLower(Handle<String> s, Isolate* isolate);
     43 MaybeHandle<String> ConvertToUpper(Handle<String> s, Isolate* isolate);
     44 MaybeHandle<String> ConvertCase(Handle<String> s, bool is_upper,
     45                                 Isolate* isolate);
     46 
     47 V8_WARN_UNUSED_RESULT String* ConvertOneByteToLower(String* src, String* dst);
     48 
     49 const uint8_t* ToLatin1LowerTable();
     50 
     51 // ICUTimezoneCache calls out to ICU for TimezoneCache
     52 // functionality in a straightforward way.
     53 class ICUTimezoneCache : public base::TimezoneCache {
     54  public:
     55   ICUTimezoneCache();
     56 
     57   ~ICUTimezoneCache() override;
     58 
     59   const char* LocalTimezone(double time_ms) override;
     60 
     61   double DaylightSavingsOffset(double time_ms) override;
     62 
     63   double LocalTimeOffset(double time_ms, bool is_utc) override;
     64 
     65   void Clear() override;
     66 
     67  private:
     68   icu::TimeZone* GetTimeZone();
     69 
     70   bool GetOffsets(double time_ms, bool is_utc, int32_t* raw_offset,
     71                   int32_t* dst_offset);
     72 
     73   icu::TimeZone* timezone_;
     74 
     75   std::string timezone_name_;
     76   std::string dst_timezone_name_;
     77 };
     78 
     79 }  // namespace internal
     80 }  // namespace v8
     81 
     82 #endif  // V8_INTL_H_
     83