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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2011-2016, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
#ifndef __TZNAMES_IMPL_H__
#define __TZNAMES_IMPL_H__
/**
* \file
* \brief C++ API: TimeZoneNames object
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/tznames.h"
#include "unicode/ures.h"
#include "unicode/locid.h"
#include "uhash.h"
#include "uvector.h"
#include "umutex.h"
#include "charstr.h"
// Some zone display names involving supplementary characters can be over 50 chars, 100 UTF-16 code units, 200 UTF-8 bytes
#define ZONE_NAME_U16_MAX 128
U_NAMESPACE_BEGIN
/*
* ZNStringPool Pool of (char16_t *) strings. Provides for sharing of repeated
* zone strings.
*/
struct ZNStringPoolChunk;
class U_I18N_API ZNStringPool: public UMemory {
public:
ZNStringPool(UErrorCode &status);
~ZNStringPool();
/* Get the pooled string that is equal to the supplied string s.
* Copy the string into the pool if it is not already present.
*
* Life time of the returned string is that of the pool.
*/
const char16_t *get(const char16_t *s, UErrorCode &status);
/* Get the pooled string that is equal to the supplied string s.
* Copy the string into the pool if it is not already present.
*/
const char16_t *get(const UnicodeString &s, UErrorCode &status);
/* Adopt a string into the pool, without copying it.
* Used for strings from resource bundles, which will persist without copying.
*/
const char16_t *adopt(const char16_t *s, UErrorCode &status);
/* Freeze the string pool. Discards the hash table that is used
* for looking up a string. All pointers to pooled strings remain valid.
*/
void freeze();
private:
ZNStringPoolChunk *fChunks;
UHashtable *fHash;
};
/*
* Character node used by TextTrieMap
*/
struct CharacterNode {
// No constructor or destructor.
// We malloc and free an uninitialized array of CharacterNode objects
// and clear and delete them ourselves.
void clear();
void deleteValues(UObjectDeleter *valueDeleter);
void addValue(void *value, UObjectDeleter *valueDeleter, UErrorCode &status);
inline UBool hasValues() const;
inline int32_t countValues() const;
inline const void *getValue(int32_t index) const;
void *fValues; // Union of one single value vs. UVector of values.
char16_t fCharacter; // UTF-16 code unit.
uint16_t fFirstChild; // 0 if no children.
uint16_t fNextSibling; // 0 terminates the list.
UBool fHasValuesVector;
UBool fPadding;
// No value: fValues == nullptr and fHasValuesVector == false
// One value: fValues == value and fHasValuesVector == false
// >=2 values: fValues == UVector of values and fHasValuesVector == true
};
inline UBool CharacterNode::hasValues() const {
return fValues != nullptr;
}
inline int32_t CharacterNode::countValues() const {
return
fValues == nullptr ? 0 :
!fHasValuesVector ? 1 :
static_cast<const UVector*>(fValues)->size();
}
inline const void *CharacterNode::getValue(int32_t index) const {
if (!fHasValuesVector) {
return fValues; // Assume index == 0.
} else {
return static_cast<const UVector*>(fValues)->elementAt(index);
}
}
/*
* Search result handler callback interface used by TextTrieMap search.
*/
class TextTrieMapSearchResultHandler : public UMemory {
public:
virtual UBool handleMatch(int32_t matchLength,
const CharacterNode *node, UErrorCode& status) = 0;
virtual ~TextTrieMapSearchResultHandler(); //added to avoid warning
};
/**
* TextTrieMap is a trie implementation for supporting
* fast prefix match for the string key.
*/
class U_I18N_API TextTrieMap : public UMemory {
public:
TextTrieMap(UBool ignoreCase, UObjectDeleter *valeDeleter);
virtual ~TextTrieMap();
void put(const UnicodeString &key, void *value, ZNStringPool &sp, UErrorCode &status);
void put(const char16_t*, void *value, UErrorCode &status);
void search(const UnicodeString &text, int32_t start,
TextTrieMapSearchResultHandler *handler, UErrorCode& status) const;
int32_t isEmpty() const;
private:
UBool fIgnoreCase;
CharacterNode *fNodes;
int32_t fNodesCapacity;
int32_t fNodesCount;
UVector *fLazyContents;
UBool fIsEmpty;
UObjectDeleter *fValueDeleter;
UBool growNodes();
CharacterNode* addChildNode(CharacterNode *parent, char16_t c, UErrorCode &status);
CharacterNode* getChildNode(CharacterNode *parent, char16_t c) const;
void putImpl(const UnicodeString &key, void *value, UErrorCode &status);
void buildTrie(UErrorCode &status);
void search(CharacterNode *node, const UnicodeString &text, int32_t start,
int32_t index, TextTrieMapSearchResultHandler *handler, UErrorCode &status) const;
};
class ZNames;
class TextTrieMap;
class ZNameSearchHandler;
class TimeZoneNamesImpl : public TimeZoneNames {
public:
TimeZoneNamesImpl(const Locale& locale, UErrorCode& status);
virtual ~TimeZoneNamesImpl();
virtual bool operator==(const TimeZoneNames& other) const override;
virtual TimeZoneNamesImpl* clone() const override;
StringEnumeration* getAvailableMetaZoneIDs(UErrorCode& status) const override;
StringEnumeration* getAvailableMetaZoneIDs(const UnicodeString& tzID, UErrorCode& status) const override;
UnicodeString& getMetaZoneID(const UnicodeString& tzID, UDate date, UnicodeString& mzID) const override;
UnicodeString& getReferenceZoneID(const UnicodeString& mzID, const char* region, UnicodeString& tzID) const override;
UnicodeString& getMetaZoneDisplayName(const UnicodeString& mzID, UTimeZoneNameType type, UnicodeString& name) const override;
UnicodeString& getTimeZoneDisplayName(const UnicodeString& tzID, UTimeZoneNameType type, UnicodeString& name) const override;
UnicodeString& getExemplarLocationName(const UnicodeString& tzID, UnicodeString& name) const override;
TimeZoneNames::MatchInfoCollection* find(const UnicodeString& text, int32_t start, uint32_t types, UErrorCode& status) const override;
void loadAllDisplayNames(UErrorCode& status) override;
void getDisplayNames(const UnicodeString& tzID, const UTimeZoneNameType types[], int32_t numTypes, UDate date, UnicodeString dest[], UErrorCode& status) const override;
static UnicodeString& getDefaultExemplarLocationName(const UnicodeString& tzID, UnicodeString& name);
static StringEnumeration* _getAvailableMetaZoneIDs(UErrorCode& status);
static StringEnumeration* _getAvailableMetaZoneIDs(const UnicodeString& tzID, UErrorCode& status);
static UnicodeString& _getMetaZoneID(const UnicodeString& tzID, UDate date, UnicodeString& mzID);
static UnicodeString& _getReferenceZoneID(const UnicodeString& mzID, const char* region, UnicodeString& tzID);
private:
Locale fLocale;
UResourceBundle* fZoneStrings;
UHashtable* fTZNamesMap;
UHashtable* fMZNamesMap;
UBool fNamesTrieFullyLoaded;
UBool fNamesFullyLoaded;
TextTrieMap fNamesTrie;
void initialize(const Locale& locale, UErrorCode& status);
void cleanup();
void loadStrings(const UnicodeString& tzCanonicalID, UErrorCode& status);
ZNames* loadMetaZoneNames(const UnicodeString& mzId, UErrorCode& status);
ZNames* loadTimeZoneNames(const UnicodeString& mzId, UErrorCode& status);
TimeZoneNames::MatchInfoCollection* doFind(ZNameSearchHandler& handler,
const UnicodeString& text, int32_t start, UErrorCode& status) const;
void addAllNamesIntoTrie(UErrorCode& errorCode);
void internalLoadAllDisplayNames(UErrorCode& status);
struct ZoneStringsLoader;
};
class TZDBNames;
class TZDBTimeZoneNames : public TimeZoneNames {
public:
TZDBTimeZoneNames(const Locale& locale);
virtual ~TZDBTimeZoneNames();
virtual bool operator==(const TimeZoneNames& other) const override;
virtual TZDBTimeZoneNames* clone() const override;
StringEnumeration* getAvailableMetaZoneIDs(UErrorCode& status) const override;
StringEnumeration* getAvailableMetaZoneIDs(const UnicodeString& tzID, UErrorCode& status) const override;
UnicodeString& getMetaZoneID(const UnicodeString& tzID, UDate date, UnicodeString& mzID) const override;
UnicodeString& getReferenceZoneID(const UnicodeString& mzID, const char* region, UnicodeString& tzID) const override;
UnicodeString& getMetaZoneDisplayName(const UnicodeString& mzID, UTimeZoneNameType type, UnicodeString& name) const override;
UnicodeString& getTimeZoneDisplayName(const UnicodeString& tzID, UTimeZoneNameType type, UnicodeString& name) const override;
TimeZoneNames::MatchInfoCollection* find(const UnicodeString& text, int32_t start, uint32_t types, UErrorCode& status) const override;
// When TZDBNames for the metazone is not available, this method returns nullptr,
// but does NOT set U_MISSING_RESOURCE_ERROR to status.
static const TZDBNames* getMetaZoneNames(const UnicodeString& mzId, UErrorCode& status);
private:
Locale fLocale;
CharString fRegion;
};
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif // __TZNAMES_IMPL_H__
//eof
//
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