404 lines
14 KiB
C++
404 lines
14 KiB
C++
/*
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***************************************************************************
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* Copyright (C) 1999-2003 International Business Machines Corporation *
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* and others. All rights reserved. *
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***************************************************************************
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_BREAK_ITERATION
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#include "unicode/utypes.h"
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#include "rbbidata.h"
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#include "rbbirb.h"
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#include "utrie.h"
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#include "udatamem.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "umutex.h"
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#include "uassert.h"
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//-----------------------------------------------------------------------------------
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//
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// Trie access folding function. Copied as-is from properties code in uchar.c
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//
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//-----------------------------------------------------------------------------------
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U_CDECL_BEGIN
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static int32_t U_CALLCONV
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getFoldingOffset(uint32_t data) {
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/* if bit 15 is set, then the folding offset is in bits 14..0 of the 16-bit trie result */
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if(data&0x8000) {
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return (int32_t)(data&0x7fff);
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} else {
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return 0;
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}
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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//-----------------------------------------------------------------------------
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//
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// Constructors.
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//
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//-----------------------------------------------------------------------------
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RBBIDataWrapper::RBBIDataWrapper(const RBBIDataHeader *data, UErrorCode &status) {
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init(data, status);
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}
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RBBIDataWrapper::RBBIDataWrapper(UDataMemory* udm, UErrorCode &status) {
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const RBBIDataHeader *d = (const RBBIDataHeader *)
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// ((char *)&(udm->pHeader->info) + udm->pHeader->info.size);
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// taking into consideration the padding added in by udata_write
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((char *)(udm->pHeader) + udm->pHeader->dataHeader.headerSize);
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init(d, status);
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fUDataMem = udm;
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}
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//-----------------------------------------------------------------------------
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//
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// init(). Does most of the work of construction, shared between the
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// constructors.
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//
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//-----------------------------------------------------------------------------
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void RBBIDataWrapper::init(const RBBIDataHeader *data, UErrorCode &status) {
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if (U_FAILURE(status)) {
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return;
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}
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fHeader = data;
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if (fHeader->fMagic != 0xb1a0) {
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status = U_BRK_INTERNAL_ERROR;
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return;
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}
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fUDataMem = NULL;
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fReverseTable = NULL;
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fSafeFwdTable = NULL;
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fSafeRevTable = NULL;
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if (data->fFTableLen != 0) {
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fForwardTable = (RBBIStateTable *)((char *)data + fHeader->fFTable);
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}
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if (data->fRTableLen != 0) {
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fReverseTable = (RBBIStateTable *)((char *)data + fHeader->fRTable);
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}
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if (data->fSFTableLen != 0) {
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fSafeFwdTable = (RBBIStateTable *)((char *)data + fHeader->fSFTable);
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}
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if (data->fSRTableLen != 0) {
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fSafeRevTable = (RBBIStateTable *)((char *)data + fHeader->fSRTable);
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}
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utrie_unserialize(&fTrie,
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(uint8_t *)data + fHeader->fTrie,
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fHeader->fTrieLen,
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&status);
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if (U_FAILURE(status)) {
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return;
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}
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fTrie.getFoldingOffset=getFoldingOffset;
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fRuleSource = (UChar *)((char *)data + fHeader->fRuleSource);
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fRuleString.setTo(TRUE, fRuleSource, -1);
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fRefCount = 1;
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/// todo: maybe add this formally to the builder
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UnicodeString hardbreak = UNICODE_STRING_SIMPLE("!!lookAheadHardBreak");
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if (fRuleString.indexOf(hardbreak) >= 0) {
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fLookAheadHardBreak = TRUE;
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}
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else {
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fLookAheadHardBreak = FALSE;
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}
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#ifdef RBBI_DEBUG
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char *debugEnv = getenv("U_RBBIDEBUG");
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if (debugEnv && uprv_strstr(debugEnv, "data")) {this->printData();}
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#endif
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}
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//-----------------------------------------------------------------------------
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//
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// Destructor. Don't call this - use removeReferenc() instead.
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//
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//-----------------------------------------------------------------------------
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RBBIDataWrapper::~RBBIDataWrapper() {
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U_ASSERT(fRefCount == 0);
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if (fUDataMem) {
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udata_close(fUDataMem);
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} else {
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uprv_free((void *)fHeader);
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}
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}
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//-----------------------------------------------------------------------------
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//
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// Operator == Consider two RBBIDataWrappers to be equal if they
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// refer to the same underlying data. Although
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// the data wrappers are normally shared between
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// iterator instances, it's possible to independently
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// open the same data twice, and get two instances, which
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// should still be ==.
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//
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//-----------------------------------------------------------------------------
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UBool RBBIDataWrapper::operator ==(const RBBIDataWrapper &other) const {
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if (fHeader == other.fHeader) {
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return TRUE;
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}
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if (fHeader->fLength != other.fHeader->fLength) {
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return FALSE;
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}
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if (uprv_memcmp(fHeader, other.fHeader, fHeader->fLength) == 0) {
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return TRUE;
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}
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return FALSE;
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}
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int32_t RBBIDataWrapper::hashCode() {
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return fHeader->fFTableLen;
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}
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//-----------------------------------------------------------------------------
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//
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// Reference Counting. A single RBBIDataWrapper object is shared among
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// however many RulesBasedBreakIterator instances are
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// referencing the same data.
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//
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//-----------------------------------------------------------------------------
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void RBBIDataWrapper::removeReference() {
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if (umtx_atomic_dec(&fRefCount) == 0) {
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delete this;
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}
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}
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RBBIDataWrapper *RBBIDataWrapper::addReference() {
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umtx_atomic_inc(&fRefCount);
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return this;
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}
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//-----------------------------------------------------------------------------
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//
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// getRuleSourceString
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//
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//-----------------------------------------------------------------------------
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const UnicodeString &RBBIDataWrapper::getRuleSourceString() {
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return fRuleString;
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}
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//-----------------------------------------------------------------------------
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//
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// print - debugging function to dump the runtime data tables.
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//
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//-----------------------------------------------------------------------------
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void RBBIDataWrapper::printTable(const char *heading, const RBBIStateTable *table) {
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#ifdef RBBI_DEBUG
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uint32_t c;
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uint32_t s;
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RBBIDebugPrintf(" %s\n", heading);
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RBBIDebugPrintf("State | Acc LA Tag");
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for (c=0; c<fHeader->fCatCount; c++) {RBBIDebugPrintf("%3d ", c);}
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RBBIDebugPrintf("\n------|---------------"); for (c=0;c<fHeader->fCatCount; c++) {
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RBBIDebugPrintf("----");
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}
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RBBIDebugPrintf("\n");
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if (table == NULL) {
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RBBIDebugPrintf(" N U L L T A B L E\n\n");
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return;
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}
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for (s=0; s<table->fNumStates; s++) {
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RBBIStateTableRow *row = (RBBIStateTableRow *)
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(table->fTableData + (table->fRowLen * s));
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RBBIDebugPrintf("%4d | %3d %3d %3d ", s, row->fAccepting, row->fLookAhead, row->fTag);
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for (c=0; c<fHeader->fCatCount; c++) {
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RBBIDebugPrintf("%3d ", row->fNextState[c]);
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}
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RBBIDebugPrintf("\n");
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}
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RBBIDebugPrintf("\n");
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#endif
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}
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void RBBIDataWrapper::printData() {
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#ifdef RBBI_DEBUG
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RBBIDebugPrintf("RBBI Data at %p\n", (void *)fHeader);
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RBBIDebugPrintf(" Version = %d\n", fHeader->fVersion);
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RBBIDebugPrintf(" total length of data = %d\n", fHeader->fLength);
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RBBIDebugPrintf(" number of character categories = %d\n\n", fHeader->fCatCount);
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printTable("Forward State Transition Table", fForwardTable);
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printTable("Reverse State Transition Table", fReverseTable);
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printTable("Safe Forward State Transition Table", fSafeFwdTable);
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printTable("Safe Reverse State Transition Table", fSafeRevTable);
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RBBIDebugPrintf("\nOrignal Rules source:\n");
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for (int32_t c=0; fRuleSource[c] != 0; c++) {
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RBBIDebugPrintf("%c", fRuleSource[c]);
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}
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RBBIDebugPrintf("\n\n");
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#endif
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}
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U_NAMESPACE_END
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//-----------------------------------------------------------------------------
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//
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// ubrk_swap - byte swap and char encoding swap of RBBI data
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//
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//-----------------------------------------------------------------------------
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U_CAPI int32_t U_EXPORT2
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ubrk_swap(const UDataSwapper *ds, const void *inData, int32_t length, void *outData,
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UErrorCode *status) {
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if (status == NULL || U_FAILURE(*status)) {
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return 0;
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}
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//
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// Check that the data header is for for break data.
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// (Header contents are defined in genbrk.cpp)
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//
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const UDataInfo *pInfo = (const UDataInfo *)((const char *)inData+4);
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if(!( pInfo->dataFormat[0]==0x42 && /* dataFormat="Brk " */
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pInfo->dataFormat[1]==0x72 &&
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pInfo->dataFormat[2]==0x6b &&
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pInfo->dataFormat[3]==0x20 &&
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pInfo->formatVersion[0]==3 )) {
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udata_printError(ds, "ubrk_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized\n",
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pInfo->dataFormat[0], pInfo->dataFormat[1],
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pInfo->dataFormat[2], pInfo->dataFormat[3],
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pInfo->formatVersion[0]);
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*status=U_UNSUPPORTED_ERROR;
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return 0;
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}
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//
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// Swap the data header. (This is the generic ICU Data Header, not the RBBI Specific
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// RBBIDataHeader). This swap also conveniently gets us
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// the size of the ICU d.h., which lets us locate the start
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// of the RBBI specific data.
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//
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int32_t headerSize=udata_swapDataHeader(ds, inData, length, outData, status);
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//
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// Get the RRBI Data Header, and check that it appears to be OK.
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//
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const uint8_t *inBytes =(const uint8_t *)inData+headerSize;
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RBBIDataHeader *rbbiDH = (RBBIDataHeader *)inBytes;
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if (ds->readUInt32(rbbiDH->fMagic) != 0xb1a0 ||
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ds->readUInt32(rbbiDH->fVersion) != 1 ||
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ds->readUInt32(rbbiDH->fLength) < sizeof(RBBIDataHeader))
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{
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udata_printError(ds, "ubrk_swap(): RBBI Data header is invalid.\n");
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*status=U_UNSUPPORTED_ERROR;
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return 0;
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}
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//
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// Prefight operation? Just return the size
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//
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int32_t totalSize = headerSize + ds->readUInt32(rbbiDH->fLength);
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if (length < 0) {
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return totalSize;
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}
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//
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// Check that length passed in is consistent with length from RBBI data header.
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//
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if (length > 0) {
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length -= headerSize;
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if ((uint32_t)length < ds->readUInt32(rbbiDH->fLength)) {
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udata_printError(ds, "ubrk_swap(): too few bytes (%d after ICU Data header) for break data.\n",
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length);
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*status=U_INDEX_OUTOFBOUNDS_ERROR;
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return 0;
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}
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}
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//
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// Swap the Data. Do the data itself first, then the RBBI Data Header, because
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// we need to reference the header to locate the data, and an
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// inplace swap of the header leaves it unusable.
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//
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uint8_t *outBytes = (uint8_t *)outData + headerSize;
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int32_t tableStartOffset;
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int32_t tableLength;
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//
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// If not swapping in place, zero out the output buffer before starting.
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// Individual tables and other data items within are aligned to 8 byte boundaries
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// when originally created. Any unused space between items needs to be zero.
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//
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if (inBytes != outBytes) {
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uprv_memset(outBytes, 0, length);
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}
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// Forward state table. Two int32_t vars at the start, then all int16_ts.
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tableStartOffset = ds->readUInt32(rbbiDH->fFTable);
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tableLength = ds->readUInt32(rbbiDH->fFTableLen);
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ds->swapArray32(ds, inBytes+tableStartOffset, 8,
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outBytes+tableStartOffset, status);
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ds->swapArray16(ds, inBytes+tableStartOffset+8, tableLength-8,
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outBytes+tableStartOffset+8, status);
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// Reverse state table. Same layout as forward table, above.
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tableStartOffset = ds->readUInt32(rbbiDH->fRTable);
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tableLength = ds->readUInt32(rbbiDH->fRTableLen);
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ds->swapArray32(ds, inBytes+tableStartOffset, 8,
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outBytes+tableStartOffset, status);
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ds->swapArray16(ds, inBytes+tableStartOffset+8, tableLength-8,
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outBytes+tableStartOffset+8, status);
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// Safe Forward state table. Same layout as forward table, above.
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tableStartOffset = ds->readUInt32(rbbiDH->fSFTable);
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tableLength = ds->readUInt32(rbbiDH->fSFTableLen);
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ds->swapArray32(ds, inBytes+tableStartOffset, 8,
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outBytes+tableStartOffset, status);
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ds->swapArray16(ds, inBytes+tableStartOffset+8, tableLength-8,
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outBytes+tableStartOffset+8, status);
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// Safe Reverse state table. Same layout as forward table, above.
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tableStartOffset = ds->readUInt32(rbbiDH->fSRTable);
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tableLength = ds->readUInt32(rbbiDH->fSRTableLen);
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ds->swapArray32(ds, inBytes+tableStartOffset, 8,
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outBytes+tableStartOffset, status);
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ds->swapArray16(ds, inBytes+tableStartOffset+8, tableLength-8,
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outBytes+tableStartOffset+8, status);
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// Trie table for character categories
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utrie_swap(ds, inBytes+ds->readUInt32(rbbiDH->fTrie), ds->readUInt32(rbbiDH->fTrieLen),
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outBytes+ds->readUInt32(rbbiDH->fTrie), status);
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// Source Rules Text. It's UChar data
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ds->swapArray16(ds, inBytes+ds->readUInt32(rbbiDH->fRuleSource), ds->readUInt32(rbbiDH->fRuleSourceLen),
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outBytes+ds->readUInt32(rbbiDH->fRuleSource), status);
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// And, last, the header. All 32 bit values.
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ds->swapArray32(ds, inBytes, sizeof(RBBIDataHeader), outBytes, status);
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return totalSize;
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}
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#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
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