99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/*
|
|
* Copyright © {1999}, International Business Machines Corporation and others. All Rights Reserved.
|
|
**********************************************************************
|
|
* Date Name Description
|
|
* 11/17/99 aliu Creation.
|
|
**********************************************************************
|
|
*/
|
|
#ifndef RBT_DATA_H
|
|
#define RBT_DATA_H
|
|
|
|
#include "rbt_set.h"
|
|
|
|
class UnicodeString;
|
|
class UnicodeSet;
|
|
class Hashtable;
|
|
|
|
/**
|
|
* The rule data for a RuleBasedTransliterators. RBT objects hold
|
|
* a const pointer to a TRD object that they do not own. TRD objects
|
|
* are essentially the parsed rules in compact, usable form. The
|
|
* TRD objects themselves are held for the life of the process in
|
|
* a static cache owned by Transliterator.
|
|
*
|
|
* This class' API is a little asymmetric. There is a method to
|
|
* define a variable, but no way to define a set. This is because the
|
|
* sets are defined by the parser in a UVector, and the vector is
|
|
* copied into a fixed-size array here. Once this is done, no new
|
|
* sets may be defined. In practice, there is no need to do so, since
|
|
* generating the data and using it are discrete phases. When there
|
|
* is a need to access the set data during the parse phase, another
|
|
* data structure handles this. See the parsing code for more
|
|
* details.
|
|
*/
|
|
class TransliterationRuleData {
|
|
|
|
public:
|
|
|
|
/**
|
|
* Rule table. May be empty.
|
|
*
|
|
* PUBLIC DATA MEMBER for internal use by RBT
|
|
*/
|
|
TransliterationRuleSet ruleSet;
|
|
|
|
/**
|
|
* Map variable name (UnicodeString) to variable (Character).
|
|
* A variable name may correspond to a single literal
|
|
* character, in which case the character is stored in this
|
|
* hash. It may also correspond to a UnicodeSet, in which
|
|
* case a character is again stored in this hash, but the
|
|
* character is a stand-in: it is a key for a secondary lookup
|
|
* in data.setVariables. The stand-in also represents the
|
|
* UnicodeSet in the stored rules.
|
|
*
|
|
* PUBLIC DATA MEMBER for internal use by RBT
|
|
*/
|
|
Hashtable* variableNames;
|
|
|
|
/**
|
|
* Map category variable (Character) to set (UnicodeSet).
|
|
* Variables that correspond to a set of characters are mapped
|
|
* from variable name to a stand-in character in data.variableNames.
|
|
* The stand-in then serves as a key in this hash to lookup the
|
|
* actual UnicodeSet object. In addition, the stand-in is
|
|
* stored in the rule text to represent the set of characters.
|
|
* setVariables[i] represents character (setVariablesBase + i).
|
|
*
|
|
* PUBLIC DATA MEMBER for internal use by RBT
|
|
*/
|
|
UnicodeSet** setVariables;
|
|
|
|
/**
|
|
* The character represented by setVariables[0].
|
|
*/
|
|
UChar setVariablesBase;
|
|
|
|
/**
|
|
* The length of setVariables.
|
|
*/
|
|
int32_t setVariablesLength;
|
|
|
|
TransliterationRuleData(UErrorCode& status);
|
|
|
|
~TransliterationRuleData();
|
|
|
|
void defineVariable(const UnicodeString& name,
|
|
UChar value,
|
|
UErrorCode& status);
|
|
|
|
UChar lookupVariable(const UnicodeString& name,
|
|
UErrorCode& status) const;
|
|
|
|
const UnicodeSet* lookupSet(UChar standIn) const;
|
|
|
|
UBool isVariableDefined(const UnicodeString& name) const;
|
|
};
|
|
|
|
#endif
|