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/*
*******************************************************************************
* Copyright (C) 2010-2012, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: ucharstriebuilder.h
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2010nov14
* created by: Markus W. Scherer
*/
#ifndef __UCHARSTRIEBUILDER_H__
#define __UCHARSTRIEBUILDER_H__
#include "unicode/utypes.h"
#include "unicode/stringtriebuilder.h"
#include "unicode/ucharstrie.h"
#include "unicode/unistr.h"
/**
* \file
* \brief C++ API: Builder for icu::UCharsTrie
*/
U_NAMESPACE_BEGIN
class UCharsTrieElement;
/**
* Builder class for UCharsTrie.
*
* This class is not intended for public subclassing.
* @stable ICU 4.8
*/
class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
public:
/**
* Constructs an empty builder.
* @param errorCode Standard ICU error code.
* @stable ICU 4.8
*/
UCharsTrieBuilder(UErrorCode &errorCode);
/**
* Destructor.
* @stable ICU 4.8
*/
virtual ~UCharsTrieBuilder();
/**
* Adds a (string, value) pair.
* The string must be unique.
* The string contents will be copied; the builder does not keep
* a reference to the input UnicodeString or its buffer.
* @param s The input string.
* @param value The value associated with this string.
* @param errorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return *this
* @stable ICU 4.8
*/
UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
/**
* Builds a UCharsTrie for the add()ed data.
* Once built, no further data can be add()ed until clear() is called.
*
* This method passes ownership of the builder's internal result array to the new trie object.
* Another call to any build() variant will re-serialize the trie.
* After clear() has been called, a new array will be used as well.
* @param buildOption Build option, see UStringTrieBuildOption.
* @param errorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return A new UCharsTrie for the add()ed data.
* @stable ICU 4.8
*/
UCharsTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
/**
* Builds a UCharsTrie for the add()ed data and UChar-serializes it.
* Once built, no further data can be add()ed until clear() is called.
*
* Multiple calls to buildUnicodeString() set the UnicodeStrings to the
* builder's same UChar array, without rebuilding.
* If buildUnicodeString() is called after build(), the trie will be
* re-serialized into a new array.
* If build() is called after buildUnicodeString(), the trie object will become
* the owner of the previously returned array.
* After clear() has been called, a new array will be used as well.
* @param buildOption Build option, see UStringTrieBuildOption.
* @param result A UnicodeString which will be set to the UChar-serialized
* UCharsTrie for the add()ed data.
* @param errorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return result
* @stable ICU 4.8
*/
UnicodeString &buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result,
UErrorCode &errorCode);
/**
* Removes all (string, value) pairs.
* New data can then be add()ed and a new trie can be built.
* @return *this
* @stable ICU 4.8
*/
UCharsTrieBuilder &clear() {
strings.remove();
elementsLength=0;
ucharsLength=0;
return *this;
}
private:
UCharsTrieBuilder(const UCharsTrieBuilder &other); // no copy constructor
UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other); // no assignment operator
void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
virtual int32_t getElementStringLength(int32_t i) const;
virtual UChar getElementUnit(int32_t i, int32_t unitIndex) const;
virtual int32_t getElementValue(int32_t i) const;
virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const;
virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const;
virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const;
virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, UChar unit) const;
virtual UBool matchNodesCanHaveValues() const { return TRUE; }
virtual int32_t getMaxBranchLinearSubNodeLength() const { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
virtual int32_t getMinLinearMatch() const { return UCharsTrie::kMinLinearMatch; }
virtual int32_t getMaxLinearMatchLength() const { return UCharsTrie::kMaxLinearMatchLength; }
#ifndef U_HIDE_INTERNAL_API
class UCTLinearMatchNode : public LinearMatchNode {
public:
UCTLinearMatchNode(const UChar *units, int32_t len, Node *nextNode);
virtual UBool operator==(const Node &other) const;
virtual void write(StringTrieBuilder &builder);
private:
const UChar *s;
};
#endif
virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
Node *nextNode) const;
UBool ensureCapacity(int32_t length);
virtual int32_t write(int32_t unit);
int32_t write(const UChar *s, int32_t length);
virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length);
virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
virtual int32_t writeDeltaTo(int32_t jumpTarget);
UnicodeString strings;
UCharsTrieElement *elements;
int32_t elementsCapacity;
int32_t elementsLength;
// UChar serialization of the trie.
// Grows from the back: ucharsLength measures from the end of the buffer!
UChar *uchars;
int32_t ucharsCapacity;
int32_t ucharsLength;
};
U_NAMESPACE_END
#endif // __UCHARSTRIEBUILDER_H__