// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
***************************************************************************
* 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 "utrie2.h"
#include "udatamem.h"
#include "cmemory.h"
#include "cstring.h"
#include "umutex.h"
#include "uassert.h"
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 &&
isDataVersionAcceptable(dh->info.formatVersion))
) {
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;
}
UBool RBBIDataWrapper::isDataVersionAcceptable(const UVersionInfo version) {
return RBBI_DATA_FORMAT_VERSION[0] == version[0];
}
//-----------------------------------------------------------------------------
//
// init(). Does most of the work of construction, shared between the
// constructors.
//
//-----------------------------------------------------------------------------
void RBBIDataWrapper::init0() {
fHeader = NULL;
fForwardTable = NULL;
fReverseTable = NULL;
fRuleSource = NULL;
fRuleStatusTable = NULL;
fTrie = 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 || !isDataVersionAcceptable(fHeader->fFormatVersion)) {
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);
}
fTrie = utrie2_openFromSerialized(UTRIE2_16_VALUE_BITS,
(uint8_t *)data + fHeader->fTrie,
fHeader->fTrieLen,
NULL, // *actual length
&status);
if (U_FAILURE(status)) {
return;
}
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);
utrie2_close(fTrie);
fTrie = NULL;
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
void RBBIDataWrapper::printData() {
#ifdef RBBI_DEBUG
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);
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 &&
RBBIDataWrapper::isDataVersionAcceptable(pInfo->formatVersion) )) {
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.
//
const uint8_t *inBytes =(const uint8_t *)inData+headerSize;
RBBIDataHeader *rbbiDH = (RBBIDataHeader *)inBytes;
if (ds->readUInt32(rbbiDH->fMagic) != 0xb1a0 ||
!RBBIDataWrapper::isDataVersionAcceptable(rbbiDH->fFormatVersion) ||
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);
}
// Trie table for character categories
utrie2_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 */