Check in the pristine copy of ICU 4.6...

icu46/source/i18n/quant.cpp

+/*
+**********************************************************************
+*   Copyright (C) 2001-2008, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   Date        Name        Description
+*   07/26/01    aliu        Creation.
+**********************************************************************
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION
+
+#include "quant.h"
+#include "unicode/unistr.h"
+#include "util.h"
+
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(Quantifier)
+
+Quantifier::Quantifier(UnicodeFunctor *adoptedMatcher,
+                       uint32_t _minCount, uint32_t _maxCount) {
+    // assert(adopted != 0);
+    // assert(minCount <= maxCount);
+    matcher = adoptedMatcher;
+    this->minCount = _minCount;
+    this->maxCount = _maxCount;
+}
+
+Quantifier::Quantifier(const Quantifier& o) :
+    UnicodeFunctor(o),
+    UnicodeMatcher(o),
+    matcher(o.matcher->clone()),
+    minCount(o.minCount),
+    maxCount(o.maxCount)
+{
+}
+
+Quantifier::~Quantifier() {
+    delete matcher;
+}
+
+/**
+ * Implement UnicodeFunctor
+ */
+UnicodeFunctor* Quantifier::clone() const {
+    return new Quantifier(*this);
+}
+
+/**
+ * UnicodeFunctor API.  Cast 'this' to a UnicodeMatcher* pointer
+ * and return the pointer.
+ */
+UnicodeMatcher* Quantifier::toMatcher() const {
+    return (UnicodeMatcher*) this;
+}
+
+UMatchDegree Quantifier::matches(const Replaceable& text,
+                                 int32_t& offset,
+                                 int32_t limit,
+                                 UBool incremental) {
+    int32_t start = offset;
+    uint32_t count = 0;
+    while (count < maxCount) {
+        int32_t pos = offset;
+        UMatchDegree m = matcher->toMatcher()->matches(text, offset, limit, incremental);
+        if (m == U_MATCH) {
+            ++count;
+            if (pos == offset) {
+                // If offset has not moved we have a zero-width match.
+                // Don't keep matching it infinitely.
+                break;
+            }
+        } else if (incremental && m == U_PARTIAL_MATCH) {
+            return U_PARTIAL_MATCH;
+        } else {
+            break;
+        }
+    }
+    if (incremental && offset == limit) {
+        return U_PARTIAL_MATCH;
+    }
+    if (count >= minCount) {
+        return U_MATCH;
+    }
+    offset = start;
+    return U_MISMATCH;
+}
+
+/**
+ * Implement UnicodeMatcher
+ */
+UnicodeString& Quantifier::toPattern(UnicodeString& result,
+                                     UBool escapeUnprintable) const {
+        result.truncate(0);
+    matcher->toMatcher()->toPattern(result, escapeUnprintable);
+    if (minCount == 0) {
+        if (maxCount == 1) {
+            return result.append((UChar)63); /*?*/
+        } else if (maxCount == MAX) {
+            return result.append((UChar)42); /***/
+        }
+        // else fall through
+    } else if (minCount == 1 && maxCount == MAX) {
+        return result.append((UChar)43); /*+*/
+    }
+    result.append((UChar)123); /*{*/
+    ICU_Utility::appendNumber(result, minCount);
+    result.append((UChar)44); /*,*/
+    if (maxCount != MAX) {
+        ICU_Utility::appendNumber(result, maxCount);
+    }
+    result.append((UChar)125); /*}*/
+    return result;
+}
+
+/**
+ * Implement UnicodeMatcher
+ */
+UBool Quantifier::matchesIndexValue(uint8_t v) const {
+    return (minCount == 0) || matcher->toMatcher()->matchesIndexValue(v);
+}
+
+/**
+ * Implement UnicodeMatcher
+ */
+void Quantifier::addMatchSetTo(UnicodeSet& toUnionTo) const {
+    if (maxCount > 0) {
+        matcher->toMatcher()->addMatchSetTo(toUnionTo);
+    }
+}
+
+/**
+ * Implement UnicodeFunctor
+ */
+void Quantifier::setData(const TransliterationRuleData* d) {
+                matcher->setData(d);
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */
+
+//eof