Check in the pristine copy of ICU 51.2

icu51/source/common/unicode/ucharstriebuilder.h

Index: icu51/source/common/unicode/ucharstriebuilder.h
===================================================================
--- icu51/source/common/unicode/ucharstriebuilder.h	(revision 0)
+++ icu51/source/common/unicode/ucharstriebuilder.h	(revision 0)
@@ -0,0 +1,181 @@
+/*
+*******************************************************************************
+*   Copyright (C) 2010-2012, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*   file name:  ucharstriebuilder.h
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2010nov14
+*   created by: Markus W. Scherer
+*/
+
+#ifndef __UCHARSTRIEBUILDER_H__
+#define __UCHARSTRIEBUILDER_H__
+
+#include "unicode/utypes.h"
+#include "unicode/stringtriebuilder.h"
+#include "unicode/ucharstrie.h"
+#include "unicode/unistr.h"
+
+/**
+ * \file
+ * \brief C++ API: Builder for icu::UCharsTrie
+ */
+
+U_NAMESPACE_BEGIN
+
+class UCharsTrieElement;
+
+/**
+ * Builder class for UCharsTrie.
+ *
+ * This class is not intended for public subclassing.
+ * @stable ICU 4.8
+ */
+class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
+public:
+    /**
+     * Constructs an empty builder.
+     * @param errorCode Standard ICU error code.
+     * @stable ICU 4.8
+     */
+    UCharsTrieBuilder(UErrorCode &errorCode);
+
+    /**
+     * Destructor.
+     * @stable ICU 4.8
+     */
+    virtual ~UCharsTrieBuilder();
+
+    /**
+     * Adds a (string, value) pair.
+     * The string must be unique.
+     * The string contents will be copied; the builder does not keep
+     * a reference to the input UnicodeString or its buffer.
+     * @param s The input string.
+     * @param value The value associated with this string.
+     * @param errorCode Standard ICU error code. Its input value must
+     *                  pass the U_SUCCESS() test, or else the function returns
+     *                  immediately. Check for U_FAILURE() on output or use with
+     *                  function chaining. (See User Guide for details.)
+     * @return *this
+     * @stable ICU 4.8
+     */
+    UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
+
+    /**
+     * Builds a UCharsTrie for the add()ed data.
+     * Once built, no further data can be add()ed until clear() is called.
+     *
+     * This method passes ownership of the builder's internal result array to the new trie object.
+     * Another call to any build() variant will re-serialize the trie.
+     * After clear() has been called, a new array will be used as well.
+     * @param buildOption Build option, see UStringTrieBuildOption.
+     * @param errorCode Standard ICU error code. Its input value must
+     *                  pass the U_SUCCESS() test, or else the function returns
+     *                  immediately. Check for U_FAILURE() on output or use with
+     *                  function chaining. (See User Guide for details.)
+     * @return A new UCharsTrie for the add()ed data.
+     * @stable ICU 4.8
+     */
+    UCharsTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
+
+    /**
+     * Builds a UCharsTrie for the add()ed data and UChar-serializes it.
+     * Once built, no further data can be add()ed until clear() is called.
+     *
+     * Multiple calls to buildUnicodeString() set the UnicodeStrings to the
+     * builder's same UChar array, without rebuilding.
+     * If buildUnicodeString() is called after build(), the trie will be
+     * re-serialized into a new array.
+     * If build() is called after buildUnicodeString(), the trie object will become
+     * the owner of the previously returned array.
+     * After clear() has been called, a new array will be used as well.
+     * @param buildOption Build option, see UStringTrieBuildOption.
+     * @param result A UnicodeString which will be set to the UChar-serialized
+     *               UCharsTrie for the add()ed data.
+     * @param errorCode Standard ICU error code. Its input value must
+     *                  pass the U_SUCCESS() test, or else the function returns
+     *                  immediately. Check for U_FAILURE() on output or use with
+     *                  function chaining. (See User Guide for details.)
+     * @return result
+     * @stable ICU 4.8
+     */
+    UnicodeString &buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result,
+                                      UErrorCode &errorCode);
+
+    /**
+     * Removes all (string, value) pairs.
+     * New data can then be add()ed and a new trie can be built.
+     * @return *this
+     * @stable ICU 4.8
+     */
+    UCharsTrieBuilder &clear() {
+        strings.remove();
+        elementsLength=0;
+        ucharsLength=0;
+        return *this;
+    }
+
+private:
+    UCharsTrieBuilder(const UCharsTrieBuilder &other);  // no copy constructor
+    UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other);  // no assignment operator
+
+    void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
+
+    virtual int32_t getElementStringLength(int32_t i) const;
+    virtual UChar getElementUnit(int32_t i, int32_t unitIndex) const;
+    virtual int32_t getElementValue(int32_t i) const;
+
+    virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const;
+
+    virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const;
+    virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const;
+    virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, UChar unit) const;
+
+    virtual UBool matchNodesCanHaveValues() const { return TRUE; }
+
+    virtual int32_t getMaxBranchLinearSubNodeLength() const { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
+    virtual int32_t getMinLinearMatch() const { return UCharsTrie::kMinLinearMatch; }
+    virtual int32_t getMaxLinearMatchLength() const { return UCharsTrie::kMaxLinearMatchLength; }
+
+#ifndef U_HIDE_INTERNAL_API
+    class UCTLinearMatchNode : public LinearMatchNode {
+    public:
+        UCTLinearMatchNode(const UChar *units, int32_t len, Node *nextNode);
+        virtual UBool operator==(const Node &other) const;
+        virtual void write(StringTrieBuilder &builder);
+    private:
+        const UChar *s;
+    };
+#endif
+
+    virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
+                                        Node *nextNode) const;
+
+    UBool ensureCapacity(int32_t length);
+    virtual int32_t write(int32_t unit);
+    int32_t write(const UChar *s, int32_t length);
+    virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length);
+    virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
+    virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
+    virtual int32_t writeDeltaTo(int32_t jumpTarget);
+
+    UnicodeString strings;
+    UCharsTrieElement *elements;
+    int32_t elementsCapacity;
+    int32_t elementsLength;
+
+    // UChar serialization of the trie.
+    // Grows from the back: ucharsLength measures from the end of the buffer!
+    UChar *uchars;
+    int32_t ucharsCapacity;
+    int32_t ucharsLength;
+};
+
+U_NAMESPACE_END
+
+#endif  // __UCHARSTRIEBUILDER_H__
Property changes on: icu51/source/common/unicode/ucharstriebuilder.h
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