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-rw-r--r--intl/icu/source/i18n/uspoof_conf.cpp477
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diff --git a/intl/icu/source/i18n/uspoof_conf.cpp b/intl/icu/source/i18n/uspoof_conf.cpp
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+*
+* Copyright (C) 2008-2015, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+******************************************************************************
+* file name: uspoof_conf.cpp
+* encoding: UTF-8
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 2009Jan05 (refactoring earlier files)
+* created by: Andy Heninger
+*
+* Internal classes for compiling confusable data into its binary (runtime) form.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/uspoof.h"
+#if !UCONFIG_NO_REGULAR_EXPRESSIONS
+#if !UCONFIG_NO_NORMALIZATION
+
+#include "unicode/unorm.h"
+#include "unicode/uregex.h"
+#include "unicode/ustring.h"
+#include "cmemory.h"
+#include "uspoof_impl.h"
+#include "uhash.h"
+#include "uvector.h"
+#include "uassert.h"
+#include "uarrsort.h"
+#include "uspoof_conf.h"
+
+U_NAMESPACE_USE
+
+
+//---------------------------------------------------------------------
+//
+// buildConfusableData Compile the source confusable data, as defined by
+// the Unicode data file confusables.txt, into the binary
+// structures used by the confusable detector.
+//
+// The binary structures are described in uspoof_impl.h
+//
+// 1. Parse the data, making a hash table mapping from a UChar32 to a String.
+//
+// 2. Sort all of the strings encountered by length, since they will need to
+// be stored in that order in the final string table.
+// TODO: Sorting these strings by length is no longer needed since the removal of
+// the string lengths table. This logic can be removed to save processing time
+// when building confusables data.
+//
+// 3. Build a list of keys (UChar32s) from the four mapping tables. Sort the
+// list because that will be the ordering of our runtime table.
+//
+// 4. Generate the run time string table. This is generated before the key & value
+// tables because we need the string indexes when building those tables.
+//
+// 5. Build the run-time key and value tables. These are parallel tables, and are built
+// at the same time
+//
+
+SPUString::SPUString(LocalPointer<UnicodeString> s) {
+ fStr = std::move(s);
+ fCharOrStrTableIndex = 0;
+}
+
+
+SPUString::~SPUString() {
+}
+
+
+SPUStringPool::SPUStringPool(UErrorCode &status) : fVec(nullptr), fHash(nullptr) {
+ LocalPointer<UVector> vec(new UVector(status), status);
+ if (U_FAILURE(status)) {
+ return;
+ }
+ vec->setDeleter(
+ [](void *obj) {delete (SPUString *)obj;});
+ fVec = vec.orphan();
+ fHash = uhash_open(uhash_hashUnicodeString, // key hash function
+ uhash_compareUnicodeString, // Key Comparator
+ nullptr, // Value Comparator
+ &status);
+}
+
+
+SPUStringPool::~SPUStringPool() {
+ delete fVec;
+ uhash_close(fHash);
+}
+
+
+int32_t SPUStringPool::size() {
+ return fVec->size();
+}
+
+SPUString *SPUStringPool::getByIndex(int32_t index) {
+ SPUString *retString = (SPUString *)fVec->elementAt(index);
+ return retString;
+}
+
+
+// Comparison function for ordering strings in the string pool.
+// Compare by length first, then, within a group of the same length,
+// by code point order.
+// Conforms to the type signature for a USortComparator in uvector.h
+
+static int32_t U_CALLCONV SPUStringCompare(UHashTok left, UHashTok right) {
+ const SPUString *sL = const_cast<const SPUString *>(
+ static_cast<SPUString *>(left.pointer));
+ const SPUString *sR = const_cast<const SPUString *>(
+ static_cast<SPUString *>(right.pointer));
+ int32_t lenL = sL->fStr->length();
+ int32_t lenR = sR->fStr->length();
+ if (lenL < lenR) {
+ return -1;
+ } else if (lenL > lenR) {
+ return 1;
+ } else {
+ return sL->fStr->compare(*(sR->fStr));
+ }
+}
+
+void SPUStringPool::sort(UErrorCode &status) {
+ fVec->sort(SPUStringCompare, status);
+}
+
+
+SPUString *SPUStringPool::addString(UnicodeString *src, UErrorCode &status) {
+ LocalPointer<UnicodeString> lpSrc(src);
+ if (U_FAILURE(status)) {
+ return nullptr;
+ }
+ SPUString *hashedString = static_cast<SPUString *>(uhash_get(fHash, src));
+ if (hashedString != nullptr) {
+ return hashedString;
+ }
+ LocalPointer<SPUString> spuStr(new SPUString(std::move(lpSrc)), status);
+ hashedString = spuStr.getAlias();
+ fVec->adoptElement(spuStr.orphan(), status);
+ if (U_FAILURE(status)) {
+ return nullptr;
+ }
+ uhash_put(fHash, src, hashedString, &status);
+ return hashedString;
+}
+
+
+
+ConfusabledataBuilder::ConfusabledataBuilder(SpoofImpl *spImpl, UErrorCode &status) :
+ fSpoofImpl(spImpl),
+ fInput(nullptr),
+ fTable(nullptr),
+ fKeySet(nullptr),
+ fKeyVec(nullptr),
+ fValueVec(nullptr),
+ fStringTable(nullptr),
+ stringPool(nullptr),
+ fParseLine(nullptr),
+ fParseHexNum(nullptr),
+ fLineNum(0)
+{
+ if (U_FAILURE(status)) {
+ return;
+ }
+
+ fTable = uhash_open(uhash_hashLong, uhash_compareLong, nullptr, &status);
+
+ fKeySet = new UnicodeSet();
+ if (fKeySet == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+
+ fKeyVec = new UVector(status);
+ if (fKeyVec == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+
+ fValueVec = new UVector(status);
+ if (fValueVec == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+
+ stringPool = new SPUStringPool(status);
+ if (stringPool == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+}
+
+
+ConfusabledataBuilder::~ConfusabledataBuilder() {
+ uprv_free(fInput);
+ uregex_close(fParseLine);
+ uregex_close(fParseHexNum);
+ uhash_close(fTable);
+ delete fKeySet;
+ delete fKeyVec;
+ delete fStringTable;
+ delete fValueVec;
+ delete stringPool;
+}
+
+
+void ConfusabledataBuilder::buildConfusableData(SpoofImpl * spImpl, const char * confusables,
+ int32_t confusablesLen, int32_t *errorType, UParseError *pe, UErrorCode &status) {
+
+ if (U_FAILURE(status)) {
+ return;
+ }
+ ConfusabledataBuilder builder(spImpl, status);
+ builder.build(confusables, confusablesLen, status);
+ if (U_FAILURE(status) && errorType != nullptr) {
+ *errorType = USPOOF_SINGLE_SCRIPT_CONFUSABLE;
+ pe->line = builder.fLineNum;
+ }
+}
+
+
+void ConfusabledataBuilder::build(const char * confusables, int32_t confusablesLen,
+ UErrorCode &status) {
+
+ // Convert the user input data from UTF-8 to char16_t (UTF-16)
+ int32_t inputLen = 0;
+ if (U_FAILURE(status)) {
+ return;
+ }
+ u_strFromUTF8(nullptr, 0, &inputLen, confusables, confusablesLen, &status);
+ if (status != U_BUFFER_OVERFLOW_ERROR) {
+ return;
+ }
+ status = U_ZERO_ERROR;
+ fInput = static_cast<char16_t *>(uprv_malloc((inputLen+1) * sizeof(char16_t)));
+ if (fInput == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ u_strFromUTF8(fInput, inputLen+1, nullptr, confusables, confusablesLen, &status);
+
+
+ // Regular Expression to parse a line from Confusables.txt. The expression will match
+ // any line. What was matched is determined by examining which capture groups have a match.
+ // Capture Group 1: the source char
+ // Capture Group 2: the replacement chars
+ // Capture Group 3-6 the table type, SL, SA, ML, or MA (deprecated)
+ // Capture Group 7: A blank or comment only line.
+ // Capture Group 8: A syntactically invalid line. Anything that didn't match before.
+ // Example Line from the confusables.txt source file:
+ // "1D702 ; 006E 0329 ; SL # MATHEMATICAL ITALIC SMALL ETA ... "
+ UnicodeString pattern(
+ "(?m)^[ \\t]*([0-9A-Fa-f]+)[ \\t]+;" // Match the source char
+ "[ \\t]*([0-9A-Fa-f]+" // Match the replacement char(s)
+ "(?:[ \\t]+[0-9A-Fa-f]+)*)[ \\t]*;" // (continued)
+ "\\s*(?:(SL)|(SA)|(ML)|(MA))" // Match the table type
+ "[ \\t]*(?:#.*?)?$" // Match any trailing #comment
+ "|^([ \\t]*(?:#.*?)?)$" // OR match empty lines or lines with only a #comment
+ "|^(.*?)$", -1, US_INV); // OR match any line, which catches illegal lines.
+ // TODO: Why are we using the regex C API here? C++ would just take UnicodeString...
+ fParseLine = uregex_open(pattern.getBuffer(), pattern.length(), 0, nullptr, &status);
+
+ // Regular expression for parsing a hex number out of a space-separated list of them.
+ // Capture group 1 gets the number, with spaces removed.
+ pattern = UNICODE_STRING_SIMPLE("\\s*([0-9A-F]+)");
+ fParseHexNum = uregex_open(pattern.getBuffer(), pattern.length(), 0, nullptr, &status);
+
+ // Zap any Byte Order Mark at the start of input. Changing it to a space is benign
+ // given the syntax of the input.
+ if (*fInput == 0xfeff) {
+ *fInput = 0x20;
+ }
+
+ // Parse the input, one line per iteration of this loop.
+ uregex_setText(fParseLine, fInput, inputLen, &status);
+ while (uregex_findNext(fParseLine, &status)) {
+ fLineNum++;
+ if (uregex_start(fParseLine, 7, &status) >= 0) {
+ // this was a blank or comment line.
+ continue;
+ }
+ if (uregex_start(fParseLine, 8, &status) >= 0) {
+ // input file syntax error.
+ status = U_PARSE_ERROR;
+ return;
+ }
+
+ // We have a good input line. Extract the key character and mapping string, and
+ // put them into the appropriate mapping table.
+ UChar32 keyChar = SpoofImpl::ScanHex(fInput, uregex_start(fParseLine, 1, &status),
+ uregex_end(fParseLine, 1, &status), status);
+
+ int32_t mapStringStart = uregex_start(fParseLine, 2, &status);
+ int32_t mapStringLength = uregex_end(fParseLine, 2, &status) - mapStringStart;
+ uregex_setText(fParseHexNum, &fInput[mapStringStart], mapStringLength, &status);
+
+ UnicodeString *mapString = new UnicodeString();
+ if (mapString == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ while (uregex_findNext(fParseHexNum, &status)) {
+ UChar32 c = SpoofImpl::ScanHex(&fInput[mapStringStart], uregex_start(fParseHexNum, 1, &status),
+ uregex_end(fParseHexNum, 1, &status), status);
+ mapString->append(c);
+ }
+ U_ASSERT(mapString->length() >= 1);
+
+ // Put the map (value) string into the string pool
+ // This a little like a Java intern() - any duplicates will be eliminated.
+ SPUString *smapString = stringPool->addString(mapString, status);
+
+ // Add the UChar32 -> string mapping to the table.
+ // For Unicode 8, the SL, SA and ML tables have been discontinued.
+ // All input data from confusables.txt is tagged MA.
+ uhash_iput(fTable, keyChar, smapString, &status);
+ if (U_FAILURE(status)) { return; }
+ fKeySet->add(keyChar);
+ }
+
+ // Input data is now all parsed and collected.
+ // Now create the run-time binary form of the data.
+ //
+ // This is done in two steps. First the data is assembled into vectors and strings,
+ // for ease of construction, then the contents of these collections are dumped
+ // into the actual raw-bytes data storage.
+
+ // Build up the string array, and record the index of each string therein
+ // in the (build time only) string pool.
+ // Strings of length one are not entered into the strings array.
+ // (Strings in the table are sorted by length)
+ stringPool->sort(status);
+ fStringTable = new UnicodeString();
+ int32_t poolSize = stringPool->size();
+ int32_t i;
+ for (i=0; i<poolSize; i++) {
+ SPUString *s = stringPool->getByIndex(i);
+ int32_t strLen = s->fStr->length();
+ int32_t strIndex = fStringTable->length();
+ if (strLen == 1) {
+ // strings of length one do not get an entry in the string table.
+ // Keep the single string character itself here, which is the same
+ // convention that is used in the final run-time string table index.
+ s->fCharOrStrTableIndex = s->fStr->charAt(0);
+ } else {
+ s->fCharOrStrTableIndex = strIndex;
+ fStringTable->append(*(s->fStr));
+ }
+ }
+
+ // Construct the compile-time Key and Value tables
+ //
+ // For each key code point, check which mapping tables it applies to,
+ // and create the final data for the key & value structures.
+ //
+ // The four logical mapping tables are conflated into one combined table.
+ // If multiple logical tables have the same mapping for some key, they
+ // share a single entry in the combined table.
+ // If more than one mapping exists for the same key code point, multiple
+ // entries will be created in the table
+
+ for (int32_t range=0; range<fKeySet->getRangeCount(); range++) {
+ // It is an oddity of the UnicodeSet API that simply enumerating the contained
+ // code points requires a nested loop.
+ for (UChar32 keyChar=fKeySet->getRangeStart(range);
+ keyChar <= fKeySet->getRangeEnd(range); keyChar++) {
+ SPUString *targetMapping = static_cast<SPUString *>(uhash_iget(fTable, keyChar));
+ U_ASSERT(targetMapping != nullptr);
+
+ // Set an error code if trying to consume a long string. Otherwise,
+ // codePointAndLengthToKey will abort on a U_ASSERT.
+ if (targetMapping->fStr->length() > 256) {
+ status = U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ int32_t key = ConfusableDataUtils::codePointAndLengthToKey(keyChar,
+ targetMapping->fStr->length());
+ int32_t value = targetMapping->fCharOrStrTableIndex;
+
+ fKeyVec->addElement(key, status);
+ fValueVec->addElement(value, status);
+ }
+ }
+
+ // Put the assembled data into the flat runtime array
+ outputData(status);
+
+ // All of the intermediate allocated data belongs to the ConfusabledataBuilder
+ // object (this), and is deleted in the destructor.
+ return;
+}
+
+//
+// outputData The confusable data has been compiled and stored in intermediate
+// collections and strings. Copy it from there to the final flat
+// binary array.
+//
+// Note that as each section is added to the output data, the
+// expand (reserveSpace() function will likely relocate it in memory.
+// Be careful with pointers.
+//
+void ConfusabledataBuilder::outputData(UErrorCode &status) {
+
+ U_ASSERT(fSpoofImpl->fSpoofData->fDataOwned);
+
+ // The Key Table
+ // While copying the keys to the runtime array,
+ // also sanity check that they are sorted.
+
+ int32_t numKeys = fKeyVec->size();
+ int32_t *keys =
+ static_cast<int32_t *>(fSpoofImpl->fSpoofData->reserveSpace(numKeys*sizeof(int32_t), status));
+ if (U_FAILURE(status)) {
+ return;
+ }
+ int i;
+ UChar32 previousCodePoint = 0;
+ for (i=0; i<numKeys; i++) {
+ int32_t key = fKeyVec->elementAti(i);
+ UChar32 codePoint = ConfusableDataUtils::keyToCodePoint(key);
+ (void)previousCodePoint; // Suppress unused variable warning.
+ // strictly greater because there can be only one entry per code point
+ U_ASSERT(codePoint > previousCodePoint);
+ keys[i] = key;
+ previousCodePoint = codePoint;
+ }
+ SpoofDataHeader *rawData = fSpoofImpl->fSpoofData->fRawData;
+ rawData->fCFUKeys = (int32_t)((char *)keys - (char *)rawData);
+ rawData->fCFUKeysSize = numKeys;
+ fSpoofImpl->fSpoofData->fCFUKeys = keys;
+
+
+ // The Value Table, parallels the key table
+ int32_t numValues = fValueVec->size();
+ U_ASSERT(numKeys == numValues);
+ uint16_t *values =
+ static_cast<uint16_t *>(fSpoofImpl->fSpoofData->reserveSpace(numKeys*sizeof(uint16_t), status));
+ if (U_FAILURE(status)) {
+ return;
+ }
+ for (i=0; i<numValues; i++) {
+ uint32_t value = static_cast<uint32_t>(fValueVec->elementAti(i));
+ U_ASSERT(value < 0xffff);
+ values[i] = static_cast<uint16_t>(value);
+ }
+ rawData = fSpoofImpl->fSpoofData->fRawData;
+ rawData->fCFUStringIndex = (int32_t)((char *)values - (char *)rawData);
+ rawData->fCFUStringIndexSize = numValues;
+ fSpoofImpl->fSpoofData->fCFUValues = values;
+
+ // The Strings Table.
+
+ uint32_t stringsLength = fStringTable->length();
+ // Reserve an extra space so the string will be nul-terminated. This is
+ // only a convenience, for when debugging; it is not needed otherwise.
+ char16_t *strings =
+ static_cast<char16_t *>(fSpoofImpl->fSpoofData->reserveSpace(stringsLength*sizeof(char16_t)+2, status));
+ if (U_FAILURE(status)) {
+ return;
+ }
+ fStringTable->extract(strings, stringsLength+1, status);
+ rawData = fSpoofImpl->fSpoofData->fRawData;
+ U_ASSERT(rawData->fCFUStringTable == 0);
+ rawData->fCFUStringTable = (int32_t)((char *)strings - (char *)rawData);
+ rawData->fCFUStringTableLen = stringsLength;
+ fSpoofImpl->fSpoofData->fCFUStrings = strings;
+}
+
+#endif
+#endif // !UCONFIG_NO_REGULAR_EXPRESSIONS
+
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