diff options
Diffstat (limited to 'deps/icu-small/source/common/rbbidata.cpp')
| -rw-r--r-- | deps/icu-small/source/common/rbbidata.cpp | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/deps/icu-small/source/common/rbbidata.cpp b/deps/icu-small/source/common/rbbidata.cpp new file mode 100644 index 0000000000..3f151b42bb --- /dev/null +++ b/deps/icu-small/source/common/rbbidata.cpp @@ -0,0 +1,474 @@ +/* +*************************************************************************** +* Copyright (C) 1999-2014 International Business Machines Corporation * +* and others. All rights reserved. * +*************************************************************************** +*/ + +#include "unicode/utypes.h" + +#if !UCONFIG_NO_BREAK_ITERATION + +#include "unicode/utypes.h" +#include "rbbidata.h" +#include "rbbirb.h" +#include "utrie.h" +#include "udatamem.h" +#include "cmemory.h" +#include "cstring.h" +#include "umutex.h" + +#include "uassert.h" + + +//----------------------------------------------------------------------------------- +// +// Trie access folding function. Copied as-is from properties code in uchar.c +// +//----------------------------------------------------------------------------------- +U_CDECL_BEGIN +static int32_t U_CALLCONV +getFoldingOffset(uint32_t data) { + /* if bit 15 is set, then the folding offset is in bits 14..0 of the 16-bit trie result */ + if(data&0x8000) { + return (int32_t)(data&0x7fff); + } else { + return 0; + } +} +U_CDECL_END + +U_NAMESPACE_BEGIN + +//----------------------------------------------------------------------------- +// +// Constructors. +// +//----------------------------------------------------------------------------- +RBBIDataWrapper::RBBIDataWrapper(const RBBIDataHeader *data, UErrorCode &status) { + init0(); + init(data, status); +} + +RBBIDataWrapper::RBBIDataWrapper(const RBBIDataHeader *data, enum EDontAdopt, UErrorCode &status) { + init0(); + init(data, status); + fDontFreeData = TRUE; +} + +RBBIDataWrapper::RBBIDataWrapper(UDataMemory* udm, UErrorCode &status) { + init0(); + if (U_FAILURE(status)) { + return; + } + const DataHeader *dh = udm->pHeader; + int32_t headerSize = dh->dataHeader.headerSize; + if ( !(headerSize >= 20 && + dh->info.isBigEndian == U_IS_BIG_ENDIAN && + dh->info.charsetFamily == U_CHARSET_FAMILY && + dh->info.dataFormat[0] == 0x42 && // dataFormat="Brk " + dh->info.dataFormat[1] == 0x72 && + dh->info.dataFormat[2] == 0x6b && + dh->info.dataFormat[3] == 0x20) + // Note: info.fFormatVersion is duplicated in the RBBIDataHeader, and is + // validated when checking that. + ) { + status = U_INVALID_FORMAT_ERROR; + return; + } + const char *dataAsBytes = reinterpret_cast<const char *>(dh); + const RBBIDataHeader *rbbidh = reinterpret_cast<const RBBIDataHeader *>(dataAsBytes + headerSize); + init(rbbidh, status); + fUDataMem = udm; +} + +//----------------------------------------------------------------------------- +// +// init(). Does most of the work of construction, shared between the +// constructors. +// +//----------------------------------------------------------------------------- +void RBBIDataWrapper::init0() { + fHeader = NULL; + fForwardTable = NULL; + fReverseTable = NULL; + fSafeFwdTable = NULL; + fSafeRevTable = NULL; + fRuleSource = NULL; + fRuleStatusTable = NULL; + fUDataMem = NULL; + fRefCount = 0; + fDontFreeData = TRUE; +} + +void RBBIDataWrapper::init(const RBBIDataHeader *data, UErrorCode &status) { + if (U_FAILURE(status)) { + return; + } + fHeader = data; + if (fHeader->fMagic != 0xb1a0 || fHeader->fFormatVersion[0] != 3) + { + status = U_INVALID_FORMAT_ERROR; + return; + } + // Note: in ICU version 3.2 and earlier, there was a formatVersion 1 + // that is no longer supported. At that time fFormatVersion was + // an int32_t field, rather than an array of 4 bytes. + + fDontFreeData = FALSE; + if (data->fFTableLen != 0) { + fForwardTable = (RBBIStateTable *)((char *)data + fHeader->fFTable); + } + if (data->fRTableLen != 0) { + fReverseTable = (RBBIStateTable *)((char *)data + fHeader->fRTable); + } + if (data->fSFTableLen != 0) { + fSafeFwdTable = (RBBIStateTable *)((char *)data + fHeader->fSFTable); + } + if (data->fSRTableLen != 0) { + fSafeRevTable = (RBBIStateTable *)((char *)data + fHeader->fSRTable); + } + + + utrie_unserialize(&fTrie, + (uint8_t *)data + fHeader->fTrie, + fHeader->fTrieLen, + &status); + if (U_FAILURE(status)) { + return; + } + fTrie.getFoldingOffset=getFoldingOffset; + + + fRuleSource = (UChar *)((char *)data + fHeader->fRuleSource); + fRuleString.setTo(TRUE, fRuleSource, -1); + U_ASSERT(data->fRuleSourceLen > 0); + + fRuleStatusTable = (int32_t *)((char *)data + fHeader->fStatusTable); + fStatusMaxIdx = data->fStatusTableLen / sizeof(int32_t); + + fRefCount = 1; + +#ifdef RBBI_DEBUG + char *debugEnv = getenv("U_RBBIDEBUG"); + if (debugEnv && uprv_strstr(debugEnv, "data")) {this->printData();} +#endif +} + + +//----------------------------------------------------------------------------- +// +// Destructor. Don't call this - use removeReference() instead. +// +//----------------------------------------------------------------------------- +RBBIDataWrapper::~RBBIDataWrapper() { + U_ASSERT(fRefCount == 0); + if (fUDataMem) { + udata_close(fUDataMem); + } else if (!fDontFreeData) { + uprv_free((void *)fHeader); + } +} + + + +//----------------------------------------------------------------------------- +// +// Operator == Consider two RBBIDataWrappers to be equal if they +// refer to the same underlying data. Although +// the data wrappers are normally shared between +// iterator instances, it's possible to independently +// open the same data twice, and get two instances, which +// should still be ==. +// +//----------------------------------------------------------------------------- +UBool RBBIDataWrapper::operator ==(const RBBIDataWrapper &other) const { + if (fHeader == other.fHeader) { + return TRUE; + } + if (fHeader->fLength != other.fHeader->fLength) { + return FALSE; + } + if (uprv_memcmp(fHeader, other.fHeader, fHeader->fLength) == 0) { + return TRUE; + } + return FALSE; +} + +int32_t RBBIDataWrapper::hashCode() { + return fHeader->fFTableLen; +} + + + +//----------------------------------------------------------------------------- +// +// Reference Counting. A single RBBIDataWrapper object is shared among +// however many RulesBasedBreakIterator instances are +// referencing the same data. +// +//----------------------------------------------------------------------------- +void RBBIDataWrapper::removeReference() { + if (umtx_atomic_dec(&fRefCount) == 0) { + delete this; + } +} + + +RBBIDataWrapper *RBBIDataWrapper::addReference() { + umtx_atomic_inc(&fRefCount); + return this; +} + + + +//----------------------------------------------------------------------------- +// +// getRuleSourceString +// +//----------------------------------------------------------------------------- +const UnicodeString &RBBIDataWrapper::getRuleSourceString() const { + return fRuleString; +} + + +//----------------------------------------------------------------------------- +// +// print - debugging function to dump the runtime data tables. +// +//----------------------------------------------------------------------------- +#ifdef RBBI_DEBUG +void RBBIDataWrapper::printTable(const char *heading, const RBBIStateTable *table) { + uint32_t c; + uint32_t s; + + RBBIDebugPrintf(" %s\n", heading); + + RBBIDebugPrintf("State | Acc LA TagIx"); + for (c=0; c<fHeader->fCatCount; c++) {RBBIDebugPrintf("%3d ", c);} + RBBIDebugPrintf("\n------|---------------"); for (c=0;c<fHeader->fCatCount; c++) { + RBBIDebugPrintf("----"); + } + RBBIDebugPrintf("\n"); + + if (table == NULL) { + RBBIDebugPrintf(" N U L L T A B L E\n\n"); + return; + } + for (s=0; s<table->fNumStates; s++) { + RBBIStateTableRow *row = (RBBIStateTableRow *) + (table->fTableData + (table->fRowLen * s)); + RBBIDebugPrintf("%4d | %3d %3d %3d ", s, row->fAccepting, row->fLookAhead, row->fTagIdx); + for (c=0; c<fHeader->fCatCount; c++) { + RBBIDebugPrintf("%3d ", row->fNextState[c]); + } + RBBIDebugPrintf("\n"); + } + RBBIDebugPrintf("\n"); +} +#endif + + +#ifdef RBBI_DEBUG +void RBBIDataWrapper::printData() { + RBBIDebugPrintf("RBBI Data at %p\n", (void *)fHeader); + RBBIDebugPrintf(" Version = {%d %d %d %d}\n", fHeader->fFormatVersion[0], fHeader->fFormatVersion[1], + fHeader->fFormatVersion[2], fHeader->fFormatVersion[3]); + RBBIDebugPrintf(" total length of data = %d\n", fHeader->fLength); + RBBIDebugPrintf(" number of character categories = %d\n\n", fHeader->fCatCount); + + printTable("Forward State Transition Table", fForwardTable); + printTable("Reverse State Transition Table", fReverseTable); + printTable("Safe Forward State Transition Table", fSafeFwdTable); + printTable("Safe Reverse State Transition Table", fSafeRevTable); + + RBBIDebugPrintf("\nOrignal Rules source:\n"); + for (int32_t c=0; fRuleSource[c] != 0; c++) { + RBBIDebugPrintf("%c", fRuleSource[c]); + } + RBBIDebugPrintf("\n\n"); +} +#endif + + +U_NAMESPACE_END +U_NAMESPACE_USE + +//----------------------------------------------------------------------------- +// +// ubrk_swap - byte swap and char encoding swap of RBBI data +// +//----------------------------------------------------------------------------- + +U_CAPI int32_t U_EXPORT2 +ubrk_swap(const UDataSwapper *ds, const void *inData, int32_t length, void *outData, + UErrorCode *status) { + + if (status == NULL || U_FAILURE(*status)) { + return 0; + } + if(ds==NULL || inData==NULL || length<-1 || (length>0 && outData==NULL)) { + *status=U_ILLEGAL_ARGUMENT_ERROR; + return 0; + } + + // + // Check that the data header is for for break data. + // (Header contents are defined in genbrk.cpp) + // + const UDataInfo *pInfo = (const UDataInfo *)((const char *)inData+4); + if(!( pInfo->dataFormat[0]==0x42 && /* dataFormat="Brk " */ + pInfo->dataFormat[1]==0x72 && + pInfo->dataFormat[2]==0x6b && + pInfo->dataFormat[3]==0x20 && + pInfo->formatVersion[0]==3 )) { + udata_printError(ds, "ubrk_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized\n", + pInfo->dataFormat[0], pInfo->dataFormat[1], + pInfo->dataFormat[2], pInfo->dataFormat[3], + pInfo->formatVersion[0]); + *status=U_UNSUPPORTED_ERROR; + return 0; + } + + // + // Swap the data header. (This is the generic ICU Data Header, not the RBBI Specific + // RBBIDataHeader). This swap also conveniently gets us + // the size of the ICU d.h., which lets us locate the start + // of the RBBI specific data. + // + int32_t headerSize=udata_swapDataHeader(ds, inData, length, outData, status); + + + // + // Get the RRBI Data Header, and check that it appears to be OK. + // + // Note: ICU 3.2 and earlier, RBBIDataHeader::fDataFormat was actually + // an int32_t with a value of 1. Starting with ICU 3.4, + // RBBI's fDataFormat matches the dataFormat field from the + // UDataInfo header, four int8_t bytes. The value is {3,1,0,0} + // + const uint8_t *inBytes =(const uint8_t *)inData+headerSize; + RBBIDataHeader *rbbiDH = (RBBIDataHeader *)inBytes; + if (ds->readUInt32(rbbiDH->fMagic) != 0xb1a0 || + rbbiDH->fFormatVersion[0] != 3 || + ds->readUInt32(rbbiDH->fLength) < sizeof(RBBIDataHeader)) + { + udata_printError(ds, "ubrk_swap(): RBBI Data header is invalid.\n"); + *status=U_UNSUPPORTED_ERROR; + return 0; + } + + // + // Prefight operation? Just return the size + // + int32_t breakDataLength = ds->readUInt32(rbbiDH->fLength); + int32_t totalSize = headerSize + breakDataLength; + if (length < 0) { + return totalSize; + } + + // + // Check that length passed in is consistent with length from RBBI data header. + // + if (length < totalSize) { + udata_printError(ds, "ubrk_swap(): too few bytes (%d after ICU Data header) for break data.\n", + breakDataLength); + *status=U_INDEX_OUTOFBOUNDS_ERROR; + return 0; + } + + + // + // Swap the Data. Do the data itself first, then the RBBI Data Header, because + // we need to reference the header to locate the data, and an + // inplace swap of the header leaves it unusable. + // + uint8_t *outBytes = (uint8_t *)outData + headerSize; + RBBIDataHeader *outputDH = (RBBIDataHeader *)outBytes; + + int32_t tableStartOffset; + int32_t tableLength; + + // + // If not swapping in place, zero out the output buffer before starting. + // Individual tables and other data items within are aligned to 8 byte boundaries + // when originally created. Any unused space between items needs to be zero. + // + if (inBytes != outBytes) { + uprv_memset(outBytes, 0, breakDataLength); + } + + // + // Each state table begins with several 32 bit fields. Calculate the size + // in bytes of these. + // + int32_t topSize = offsetof(RBBIStateTable, fTableData); + + // Forward state table. + tableStartOffset = ds->readUInt32(rbbiDH->fFTable); + tableLength = ds->readUInt32(rbbiDH->fFTableLen); + + if (tableLength > 0) { + ds->swapArray32(ds, inBytes+tableStartOffset, topSize, + outBytes+tableStartOffset, status); + ds->swapArray16(ds, inBytes+tableStartOffset+topSize, tableLength-topSize, + outBytes+tableStartOffset+topSize, status); + } + + // Reverse state table. Same layout as forward table, above. + tableStartOffset = ds->readUInt32(rbbiDH->fRTable); + tableLength = ds->readUInt32(rbbiDH->fRTableLen); + + if (tableLength > 0) { + ds->swapArray32(ds, inBytes+tableStartOffset, topSize, + outBytes+tableStartOffset, status); + ds->swapArray16(ds, inBytes+tableStartOffset+topSize, tableLength-topSize, + outBytes+tableStartOffset+topSize, status); + } + + // Safe Forward state table. Same layout as forward table, above. + tableStartOffset = ds->readUInt32(rbbiDH->fSFTable); + tableLength = ds->readUInt32(rbbiDH->fSFTableLen); + + if (tableLength > 0) { + ds->swapArray32(ds, inBytes+tableStartOffset, topSize, + outBytes+tableStartOffset, status); + ds->swapArray16(ds, inBytes+tableStartOffset+topSize, tableLength-topSize, + outBytes+tableStartOffset+topSize, status); + } + + // Safe Reverse state table. Same layout as forward table, above. + tableStartOffset = ds->readUInt32(rbbiDH->fSRTable); + tableLength = ds->readUInt32(rbbiDH->fSRTableLen); + + if (tableLength > 0) { + ds->swapArray32(ds, inBytes+tableStartOffset, topSize, + outBytes+tableStartOffset, status); + ds->swapArray16(ds, inBytes+tableStartOffset+topSize, tableLength-topSize, + outBytes+tableStartOffset+topSize, status); + } + + // Trie table for character categories + utrie_swap(ds, inBytes+ds->readUInt32(rbbiDH->fTrie), ds->readUInt32(rbbiDH->fTrieLen), + outBytes+ds->readUInt32(rbbiDH->fTrie), status); + + // Source Rules Text. It's UChar data + ds->swapArray16(ds, inBytes+ds->readUInt32(rbbiDH->fRuleSource), ds->readUInt32(rbbiDH->fRuleSourceLen), + outBytes+ds->readUInt32(rbbiDH->fRuleSource), status); + + // Table of rule status values. It's all int_32 values + ds->swapArray32(ds, inBytes+ds->readUInt32(rbbiDH->fStatusTable), ds->readUInt32(rbbiDH->fStatusTableLen), + outBytes+ds->readUInt32(rbbiDH->fStatusTable), status); + + // And, last, the header. + // It is all int32_t values except for fFormataVersion, which is an array of four bytes. + // Swap the whole thing as int32_t, then re-swap the one field. + // + ds->swapArray32(ds, inBytes, sizeof(RBBIDataHeader), outBytes, status); + ds->swapArray32(ds, outputDH->fFormatVersion, 4, outputDH->fFormatVersion, status); + + return totalSize; +} + + +#endif /* #if !UCONFIG_NO_BREAK_ITERATION */ |