193 lines
8.8 KiB
C++
193 lines
8.8 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2005, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: rbbidata.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* RBBI data formats Includes
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*
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* Structs that describes the format of the Binary RBBI data,
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* as it is stored in ICU's data file.
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*
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* RBBIDataWrapper - Instances of this class sit between the
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* raw data structs and the RulesBasedBreakIterator objects
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* that are created by applications. The wrapper class
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* provides reference counting for the underlying data,
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* and direct pointers to data that would not otherwise
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* be accessible without ugly pointer arithmetic. The
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* wrapper does not attempt to provide any higher level
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* abstractions for the data itself.
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*
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* There will be only one instance of RBBIDataWrapper for any
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* set of RBBI run time data being shared by instances
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* (clones) of RulesBasedBreakIterator.
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*/
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#ifndef __RBBIDATA_H__
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#define __RBBIDATA_H__
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#include "unicode/utypes.h"
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#include "unicode/udata.h"
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#include "udataswp.h"
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/**
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* Swap RBBI data. See udataswp.h.
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* @internal
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*/
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U_CAPI int32_t U_EXPORT2
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ubrk_swap(const UDataSwapper *ds,
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const void *inData, int32_t length, void *outData,
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UErrorCode *pErrorCode);
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#ifdef XP_CPLUSPLUS
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#include "unicode/uobject.h"
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#include "unicode/unistr.h"
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#include "utrie.h"
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U_NAMESPACE_BEGIN
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/*
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* The following structs map exactly onto the raw data from ICU common data file.
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*/
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struct RBBIDataHeader {
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uint32_t fMagic; /* == 0xbla0 */
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uint8_t fFormatVersion[4]; /* Data Format. Same as the value in struct UDataInfo */
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/* if there is one associated with this data. */
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/* (version originates in rbbi, is copied to UDataInfo) */
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/* For ICU 3.2 and earlier, this field was */
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/* uint32_t fVersion */
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/* with a value of 1. */
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uint32_t fLength; /* Total length in bytes of this RBBI Data, */
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/* including all sections, not just the header. */
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uint32_t fCatCount; /* Number of character categories. */
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/* */
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/* Offsets and sizes of each of the subsections within the RBBI data. */
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/* All offsets are bytes from the start of the RBBIDataHeader. */
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/* All sizes are in bytes. */
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/* */
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uint32_t fFTable; /* forward state transition table. */
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uint32_t fFTableLen;
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uint32_t fRTable; /* Offset to the reverse state transition table. */
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uint32_t fRTableLen;
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uint32_t fSFTable; /* safe point forward transition table */
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uint32_t fSFTableLen;
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uint32_t fSRTable; /* safe point reverse transition table */
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uint32_t fSRTableLen;
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uint32_t fTrie; /* Offset to Trie data for character categories */
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uint32_t fTrieLen;
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uint32_t fRuleSource; /* Offset to the source for for the break */
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uint32_t fRuleSourceLen; /* rules. Stored UChar *. */
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uint32_t fStatusTable; /* Offset to the table of rule status values */
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uint32_t fStatusTableLen;
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uint32_t fReserved[6]; /* Reserved for expansion */
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};
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struct RBBIStateTableRow {
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int16_t fAccepting; /* Non-zero if this row is for an accepting state. */
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/* Value 0: not an accepting state. */
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/* -1: Unconditional Accepting state. */
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/* positive: Look-ahead match has completed. */
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/* Actual boundary position happened earlier */
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/* Value here == fLookAhead in earlier */
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/* state, at actual boundary pos. */
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int16_t fLookAhead; /* Non-zero if this row is for a state that */
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/* corresponds to a '/' in the rule source. */
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/* Value is the same as the fAccepting */
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/* value for the rule (which will appear */
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/* in a different state. */
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int16_t fTagIdx; /* Non-zero if this row covers a {tagged} position */
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/* from a rule. Value is the index in the */
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/* StatusTable of the set of matching */
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/* tags (rule status values) */
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int16_t fReserved;
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uint16_t fNextState[2]; /* Next State, indexed by char category. */
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/* Array Size is fNumCols from the */
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/* state table header. */
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/* CAUTION: see RBBITableBuilder::getTableSize() */
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/* before changing anything here. */
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};
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struct RBBIStateTable {
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uint32_t fNumStates; /* Number of states. */
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uint32_t fRowLen; /* Length of a state table row, in bytes. */
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uint32_t fFlags; /* Option Flags for this state table */
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uint32_t fReserved; /* reserved */
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char fTableData[4]; /* First RBBIStateTableRow begins here. */
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/* (making it char[] simplifies ugly address */
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/* arithmetic for indexing variable length rows.) */
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};
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typedef enum {
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RBBI_LOOKAHEAD_HARD_BREAK = 1
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} RBBIStateTableFlags;
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/* */
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/* The reference counting wrapper class */
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/* */
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class RBBIDataWrapper : public UMemory {
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public:
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RBBIDataWrapper(const RBBIDataHeader *data, UErrorCode &status);
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RBBIDataWrapper(UDataMemory* udm, UErrorCode &status);
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~RBBIDataWrapper();
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void init(const RBBIDataHeader *data, UErrorCode &status);
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RBBIDataWrapper *addReference();
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void removeReference();
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UBool operator ==(const RBBIDataWrapper &other) const;
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int32_t hashCode();
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const UnicodeString &getRuleSourceString() const;
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#ifdef RBBI_DEBUG
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void printData();
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void printTable(const char *heading, const RBBIStateTable *table);
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#else
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#define printData()
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#define printTable(heading, table)
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#endif
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/* */
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/* Pointers to items within the data */
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/* */
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const RBBIDataHeader *fHeader;
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const RBBIStateTable *fForwardTable;
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const RBBIStateTable *fReverseTable;
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const RBBIStateTable *fSafeFwdTable;
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const RBBIStateTable *fSafeRevTable;
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const UChar *fRuleSource;
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const int32_t *fRuleStatusTable;
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/* number of int32_t values in the rule status table. Used to sanity check indexing */
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int32_t fStatusMaxIdx;
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UTrie fTrie;
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private:
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int32_t fRefCount;
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UDataMemory *fUDataMem;
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UnicodeString fRuleString;
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RBBIDataWrapper(const RBBIDataWrapper &other); /* forbid copying of this class */
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RBBIDataWrapper &operator=(const RBBIDataWrapper &other); /* forbid copying of this class */
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};
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U_NAMESPACE_END
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#endif /* C++ */
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#endif
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