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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /intl/icu/source/common/mlbe.cpp
parentInitial commit. (diff)
downloadfirefox-esr-upstream.tar.xz
firefox-esr-upstream.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'intl/icu/source/common/mlbe.cpp')
-rw-r--r--intl/icu/source/common/mlbe.cpp270
1 files changed, 270 insertions, 0 deletions
diff --git a/intl/icu/source/common/mlbe.cpp b/intl/icu/source/common/mlbe.cpp
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index 0000000000..7e734f2c8a
--- /dev/null
+++ b/intl/icu/source/common/mlbe.cpp
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+// © 2022 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_BREAK_ITERATION
+
+#include "cmemory.h"
+#include "mlbe.h"
+#include "uassert.h"
+#include "ubrkimpl.h"
+#include "unicode/resbund.h"
+#include "unicode/udata.h"
+#include "unicode/utf16.h"
+#include "uresimp.h"
+#include "util.h"
+#include "uvectr32.h"
+
+U_NAMESPACE_BEGIN
+
+enum class ModelIndex { kUWStart = 0, kBWStart = 6, kTWStart = 9 };
+
+MlBreakEngine::MlBreakEngine(const UnicodeSet &digitOrOpenPunctuationOrAlphabetSet,
+ const UnicodeSet &closePunctuationSet, UErrorCode &status)
+ : fDigitOrOpenPunctuationOrAlphabetSet(digitOrOpenPunctuationOrAlphabetSet),
+ fClosePunctuationSet(closePunctuationSet),
+ fNegativeSum(0) {
+ if (U_FAILURE(status)) {
+ return;
+ }
+ loadMLModel(status);
+}
+
+MlBreakEngine::~MlBreakEngine() {}
+
+int32_t MlBreakEngine::divideUpRange(UText *inText, int32_t rangeStart, int32_t rangeEnd,
+ UVector32 &foundBreaks, const UnicodeString &inString,
+ const LocalPointer<UVector32> &inputMap,
+ UErrorCode &status) const {
+ if (U_FAILURE(status)) {
+ return 0;
+ }
+ if (rangeStart >= rangeEnd) {
+ status = U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ UVector32 boundary(inString.countChar32() + 1, status);
+ if (U_FAILURE(status)) {
+ return 0;
+ }
+ int32_t numBreaks = 0;
+ int32_t codePointLength = inString.countChar32();
+ // The ML algorithm groups six char and evaluates whether the 4th char is a breakpoint.
+ // In each iteration, it evaluates the 4th char and then moves forward one char like a sliding
+ // window. Initially, the first six values in the indexList are [-1, -1, 0, 1, 2, 3]. After
+ // moving forward, finally the last six values in the indexList are
+ // [length-4, length-3, length-2, length-1, -1, -1]. The "+4" here means four extra "-1".
+ int32_t indexSize = codePointLength + 4;
+ int32_t *indexList = (int32_t *)uprv_malloc(indexSize * sizeof(int32_t));
+ if (indexList == nullptr) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+ int32_t numCodeUnits = initIndexList(inString, indexList, status);
+
+ // Add a break for the start.
+ boundary.addElement(0, status);
+ numBreaks++;
+ if (U_FAILURE(status)) return 0;
+
+ for (int32_t idx = 0; idx + 1 < codePointLength && U_SUCCESS(status); idx++) {
+ numBreaks =
+ evaluateBreakpoint(inString, indexList, idx, numCodeUnits, numBreaks, boundary, status);
+ if (idx + 4 < codePointLength) {
+ indexList[idx + 6] = numCodeUnits;
+ numCodeUnits += U16_LENGTH(inString.char32At(indexList[idx + 6]));
+ }
+ }
+ uprv_free(indexList);
+
+ if (U_FAILURE(status)) return 0;
+
+ // Add a break for the end if there is not one there already.
+ if (boundary.lastElementi() != inString.countChar32()) {
+ boundary.addElement(inString.countChar32(), status);
+ numBreaks++;
+ }
+
+ int32_t prevCPPos = -1;
+ int32_t prevUTextPos = -1;
+ int32_t correctedNumBreaks = 0;
+ for (int32_t i = 0; i < numBreaks; i++) {
+ int32_t cpPos = boundary.elementAti(i);
+ int32_t utextPos = inputMap.isValid() ? inputMap->elementAti(cpPos) : cpPos + rangeStart;
+ U_ASSERT(cpPos > prevCPPos);
+ U_ASSERT(utextPos >= prevUTextPos);
+
+ if (utextPos > prevUTextPos) {
+ if (utextPos != rangeStart ||
+ (utextPos > 0 &&
+ fClosePunctuationSet.contains(utext_char32At(inText, utextPos - 1)))) {
+ foundBreaks.push(utextPos, status);
+ correctedNumBreaks++;
+ }
+ } else {
+ // Normalization expanded the input text, the dictionary found a boundary
+ // within the expansion, giving two boundaries with the same index in the
+ // original text. Ignore the second. See ticket #12918.
+ --numBreaks;
+ }
+ prevCPPos = cpPos;
+ prevUTextPos = utextPos;
+ }
+ (void)prevCPPos; // suppress compiler warnings about unused variable
+
+ UChar32 nextChar = utext_char32At(inText, rangeEnd);
+ if (!foundBreaks.isEmpty() && foundBreaks.peeki() == rangeEnd) {
+ // In phrase breaking, there has to be a breakpoint between Cj character and
+ // the number/open punctuation.
+ // E.g. る文字「そうだ、京都」->る▁文字▁「そうだ、▁京都」-> breakpoint between 字 and「
+ // E.g. 乗車率90%程度だろうか -> 乗車▁率▁90%▁程度だろうか -> breakpoint between 率 and 9
+ // E.g. しかもロゴがUnicode! -> しかも▁ロゴが▁Unicode!-> breakpoint between が and U
+ if (!fDigitOrOpenPunctuationOrAlphabetSet.contains(nextChar)) {
+ foundBreaks.popi();
+ correctedNumBreaks--;
+ }
+ }
+
+ return correctedNumBreaks;
+}
+
+int32_t MlBreakEngine::evaluateBreakpoint(const UnicodeString &inString, int32_t *indexList,
+ int32_t startIdx, int32_t numCodeUnits, int32_t numBreaks,
+ UVector32 &boundary, UErrorCode &status) const {
+ if (U_FAILURE(status)) {
+ return numBreaks;
+ }
+ int32_t start = 0, end = 0;
+ int32_t score = fNegativeSum;
+
+ for (int i = 0; i < 6; i++) {
+ // UW1 ~ UW6
+ start = startIdx + i;
+ if (indexList[start] != -1) {
+ end = (indexList[start + 1] != -1) ? indexList[start + 1] : numCodeUnits;
+ score += fModel[static_cast<int32_t>(ModelIndex::kUWStart) + i].geti(
+ inString.tempSubString(indexList[start], end - indexList[start]));
+ }
+ }
+ for (int i = 0; i < 3; i++) {
+ // BW1 ~ BW3
+ start = startIdx + i + 1;
+ if (indexList[start] != -1 && indexList[start + 1] != -1) {
+ end = (indexList[start + 2] != -1) ? indexList[start + 2] : numCodeUnits;
+ score += fModel[static_cast<int32_t>(ModelIndex::kBWStart) + i].geti(
+ inString.tempSubString(indexList[start], end - indexList[start]));
+ }
+ }
+ for (int i = 0; i < 4; i++) {
+ // TW1 ~ TW4
+ start = startIdx + i;
+ if (indexList[start] != -1 && indexList[start + 1] != -1 && indexList[start + 2] != -1) {
+ end = (indexList[start + 3] != -1) ? indexList[start + 3] : numCodeUnits;
+ score += fModel[static_cast<int32_t>(ModelIndex::kTWStart) + i].geti(
+ inString.tempSubString(indexList[start], end - indexList[start]));
+ }
+ }
+
+ if (score > 0) {
+ boundary.addElement(startIdx + 1, status);
+ numBreaks++;
+ }
+ return numBreaks;
+}
+
+int32_t MlBreakEngine::initIndexList(const UnicodeString &inString, int32_t *indexList,
+ UErrorCode &status) const {
+ if (U_FAILURE(status)) {
+ return 0;
+ }
+ int32_t index = 0;
+ int32_t length = inString.countChar32();
+ // Set all (lenght+4) items inside indexLength to -1 presuming -1 is 4 bytes of 0xff.
+ uprv_memset(indexList, 0xff, (length + 4) * sizeof(int32_t));
+ if (length > 0) {
+ indexList[2] = 0;
+ index = U16_LENGTH(inString.char32At(0));
+ if (length > 1) {
+ indexList[3] = index;
+ index += U16_LENGTH(inString.char32At(index));
+ if (length > 2) {
+ indexList[4] = index;
+ index += U16_LENGTH(inString.char32At(index));
+ if (length > 3) {
+ indexList[5] = index;
+ index += U16_LENGTH(inString.char32At(index));
+ }
+ }
+ }
+ }
+ return index;
+}
+
+void MlBreakEngine::loadMLModel(UErrorCode &error) {
+ // BudouX's model consists of thirteen categories, each of which is make up of pairs of the
+ // feature and its score. As integrating it into jaml.txt, we define thirteen kinds of key and
+ // value to represent the feature and the corresponding score respectively.
+
+ if (U_FAILURE(error)) return;
+
+ UnicodeString key;
+ StackUResourceBundle stackTempBundle;
+ ResourceDataValue modelKey;
+
+ LocalUResourceBundlePointer rbp(ures_openDirect(U_ICUDATA_BRKITR, "jaml", &error));
+ UResourceBundle *rb = rbp.getAlias();
+ if (U_FAILURE(error)) return;
+
+ int32_t index = 0;
+ initKeyValue(rb, "UW1Keys", "UW1Values", fModel[index++], error);
+ initKeyValue(rb, "UW2Keys", "UW2Values", fModel[index++], error);
+ initKeyValue(rb, "UW3Keys", "UW3Values", fModel[index++], error);
+ initKeyValue(rb, "UW4Keys", "UW4Values", fModel[index++], error);
+ initKeyValue(rb, "UW5Keys", "UW5Values", fModel[index++], error);
+ initKeyValue(rb, "UW6Keys", "UW6Values", fModel[index++], error);
+ initKeyValue(rb, "BW1Keys", "BW1Values", fModel[index++], error);
+ initKeyValue(rb, "BW2Keys", "BW2Values", fModel[index++], error);
+ initKeyValue(rb, "BW3Keys", "BW3Values", fModel[index++], error);
+ initKeyValue(rb, "TW1Keys", "TW1Values", fModel[index++], error);
+ initKeyValue(rb, "TW2Keys", "TW2Values", fModel[index++], error);
+ initKeyValue(rb, "TW3Keys", "TW3Values", fModel[index++], error);
+ initKeyValue(rb, "TW4Keys", "TW4Values", fModel[index++], error);
+ fNegativeSum /= 2;
+}
+
+void MlBreakEngine::initKeyValue(UResourceBundle *rb, const char *keyName, const char *valueName,
+ Hashtable &model, UErrorCode &error) {
+ int32_t keySize = 0;
+ int32_t valueSize = 0;
+ int32_t stringLength = 0;
+ UnicodeString key;
+ StackUResourceBundle stackTempBundle;
+ ResourceDataValue modelKey;
+
+ // get modelValues
+ LocalUResourceBundlePointer modelValue(ures_getByKey(rb, valueName, nullptr, &error));
+ const int32_t *value = ures_getIntVector(modelValue.getAlias(), &valueSize, &error);
+ if (U_FAILURE(error)) return;
+
+ // get modelKeys
+ ures_getValueWithFallback(rb, keyName, stackTempBundle.getAlias(), modelKey, error);
+ ResourceArray stringArray = modelKey.getArray(error);
+ keySize = stringArray.getSize();
+ if (U_FAILURE(error)) return;
+
+ for (int32_t idx = 0; idx < keySize; idx++) {
+ stringArray.getValue(idx, modelKey);
+ key = UnicodeString(modelKey.getString(stringLength, error));
+ if (U_SUCCESS(error)) {
+ U_ASSERT(idx < valueSize);
+ fNegativeSum -= value[idx];
+ model.puti(key, value[idx], error);
+ }
+ }
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_BREAK_ITERATION */