--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/fontservices/textshaperplugin/IcuSource/common/unicode/uchriter.h Tue Feb 02 02:02:46 2010 +0200
@@ -0,0 +1,381 @@
+/*
+**********************************************************************
+* Copyright (C) 1998-2005, International Business Machines
+* Corporation and others. All Rights Reserved.
+**********************************************************************
+*/
+
+#ifndef UCHRITER_H
+#define UCHRITER_H
+
+#include "unicode/utypes.h"
+#include "unicode/chariter.h"
+
+/**
+ * \file
+ * \brief C++ API: UChar Character Iterator
+ */
+
+U_NAMESPACE_BEGIN
+
+/**
+ * A concrete subclass of CharacterIterator that iterates over the
+ * characters (code units or code points) in a UChar array.
+ * It's possible not only to create an
+ * iterator that iterates over an entire UChar array, but also to
+ * create one that iterates over only a subrange of a UChar array
+ * (iterators over different subranges of the same UChar array don't
+ * compare equal).
+ * @see CharacterIterator
+ * @see ForwardCharacterIterator
+ * @stable ICU 2.0
+ */
+class U_COMMON_API UCharCharacterIterator : public CharacterIterator {
+public:
+ /**
+ * Create an iterator over the UChar array referred to by "textPtr".
+ * The iteration range is 0 to <code>length-1</code>.
+ * text is only aliased, not adopted (the
+ * destructor will not delete it).
+ * @param textPtr The UChar array to be iterated over
+ * @param length The length of the UChar array
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator(const UChar* textPtr, int32_t length);
+
+ /**
+ * Create an iterator over the UChar array referred to by "textPtr".
+ * The iteration range is 0 to <code>length-1</code>.
+ * text is only aliased, not adopted (the
+ * destructor will not delete it).
+ * The starting
+ * position is specified by "position". If "position" is outside the valid
+ * iteration range, the behavior of this object is undefined.
+ * @param textPtr The UChar array to be iteratd over
+ * @param length The length of the UChar array
+ * @param position The starting position of the iteration
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator(const UChar* textPtr, int32_t length,
+ int32_t position);
+
+ /**
+ * Create an iterator over the UChar array referred to by "textPtr".
+ * The iteration range is 0 to <code>end-1</code>.
+ * text is only aliased, not adopted (the
+ * destructor will not delete it).
+ * The starting
+ * position is specified by "position". If begin and end do not
+ * form a valid iteration range or "position" is outside the valid
+ * iteration range, the behavior of this object is undefined.
+ * @param textPtr The UChar array to be iterated over
+ * @param length The length of the UChar array
+ * @param textBegin The begin position of the iteration range
+ * @param textEnd The end position of the iteration range
+ * @param position The starting position of the iteration
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator(const UChar* textPtr, int32_t length,
+ int32_t textBegin,
+ int32_t textEnd,
+ int32_t position);
+
+ /**
+ * Copy constructor. The new iterator iterates over the same range
+ * of the same string as "that", and its initial position is the
+ * same as "that"'s current position.
+ * @param that The UCharCharacterIterator to be copied
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator(const UCharCharacterIterator& that);
+
+ /**
+ * Destructor.
+ * @stable ICU 2.0
+ */
+ virtual ~UCharCharacterIterator();
+
+ /**
+ * Assignment operator. *this is altered to iterate over the sane
+ * range of the same string as "that", and refers to the same
+ * character within that string as "that" does.
+ * @param that The object to be copied
+ * @return the newly created object
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator&
+ operator=(const UCharCharacterIterator& that);
+
+ /**
+ * Returns true if the iterators iterate over the same range of the
+ * same string and are pointing at the same character.
+ * @param that The ForwardCharacterIterator used to be compared for equality
+ * @return true if the iterators iterate over the same range of the
+ * same string and are pointing at the same character.
+ * @stable ICU 2.0
+ */
+ virtual UBool operator==(const ForwardCharacterIterator& that) const;
+
+ /**
+ * Generates a hash code for this iterator.
+ * @return the hash code.
+ * @stable ICU 2.0
+ */
+ virtual int32_t hashCode(void) const;
+
+ /**
+ * Returns a new UCharCharacterIterator referring to the same
+ * character in the same range of the same string as this one. The
+ * caller must delete the new iterator.
+ * @return the CharacterIterator newly created
+ * @stable ICU 2.0
+ */
+ virtual CharacterIterator* clone(void) const;
+
+ /**
+ * Sets the iterator to refer to the first code unit in its
+ * iteration range, and returns that code unit.
+ * This can be used to begin an iteration with next().
+ * @return the first code unit in its iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar first(void);
+
+ /**
+ * Sets the iterator to refer to the first code unit in its
+ * iteration range, returns that code unit, and moves the position
+ * to the second code unit. This is an alternative to setToStart()
+ * for forward iteration with nextPostInc().
+ * @return the first code unit in its iteration range
+ * @stable ICU 2.0
+ */
+ virtual UChar firstPostInc(void);
+
+ /**
+ * Sets the iterator to refer to the first code point in its
+ * iteration range, and returns that code unit,
+ * This can be used to begin an iteration with next32().
+ * Note that an iteration with next32PostInc(), beginning with,
+ * e.g., setToStart() or firstPostInc(), is more efficient.
+ * @return the first code point in its iteration range
+ * @stable ICU 2.0
+ */
+ virtual UChar32 first32(void);
+
+ /**
+ * Sets the iterator to refer to the first code point in its
+ * iteration range, returns that code point, and moves the position
+ * to the second code point. This is an alternative to setToStart()
+ * for forward iteration with next32PostInc().
+ * @return the first code point in its iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 first32PostInc(void);
+
+ /**
+ * Sets the iterator to refer to the last code unit in its
+ * iteration range, and returns that code unit.
+ * This can be used to begin an iteration with previous().
+ * @return the last code unit in its iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar last(void);
+
+ /**
+ * Sets the iterator to refer to the last code point in its
+ * iteration range, and returns that code unit.
+ * This can be used to begin an iteration with previous32().
+ * @return the last code point in its iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 last32(void);
+
+ /**
+ * Sets the iterator to refer to the "position"-th code unit
+ * in the text-storage object the iterator refers to, and
+ * returns that code unit.
+ * @param position the position within the text-storage object
+ * @return the code unit
+ * @stable ICU 2.0
+ */
+ virtual UChar setIndex(int32_t position);
+
+ /**
+ * Sets the iterator to refer to the beginning of the code point
+ * that contains the "position"-th code unit
+ * in the text-storage object the iterator refers to, and
+ * returns that code point.
+ * The current position is adjusted to the beginning of the code point
+ * (its first code unit).
+ * @param position the position within the text-storage object
+ * @return the code unit
+ * @stable ICU 2.0
+ */
+ virtual UChar32 setIndex32(int32_t position);
+
+ /**
+ * Returns the code unit the iterator currently refers to.
+ * @return the code unit the iterator currently refers to.
+ * @stable ICU 2.0
+ */
+ virtual UChar current(void) const;
+
+ /**
+ * Returns the code point the iterator currently refers to.
+ * @return the code point the iterator currently refers to.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 current32(void) const;
+
+ /**
+ * Advances to the next code unit in the iteration range (toward
+ * endIndex()), and returns that code unit. If there are no more
+ * code units to return, returns DONE.
+ * @return the next code unit in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar next(void);
+
+ /**
+ * Gets the current code unit for returning and advances to the next code unit
+ * in the iteration range
+ * (toward endIndex()). If there are
+ * no more code units to return, returns DONE.
+ * @return the current code unit.
+ * @stable ICU 2.0
+ */
+ virtual UChar nextPostInc(void);
+
+ /**
+ * Advances to the next code point in the iteration range (toward
+ * endIndex()), and returns that code point. If there are no more
+ * code points to return, returns DONE.
+ * Note that iteration with "pre-increment" semantics is less
+ * efficient than iteration with "post-increment" semantics
+ * that is provided by next32PostInc().
+ * @return the next code point in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 next32(void);
+
+ /**
+ * Gets the current code point for returning and advances to the next code point
+ * in the iteration range
+ * (toward endIndex()). If there are
+ * no more code points to return, returns DONE.
+ * @return the current point.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 next32PostInc(void);
+
+ /**
+ * Returns FALSE if there are no more code units or code points
+ * at or after the current position in the iteration range.
+ * This is used with nextPostInc() or next32PostInc() in forward
+ * iteration.
+ * @return FALSE if there are no more code units or code points
+ * at or after the current position in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UBool hasNext();
+
+ /**
+ * Advances to the previous code unit in the iteration range (toward
+ * startIndex()), and returns that code unit. If there are no more
+ * code units to return, returns DONE.
+ * @return the previous code unit in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar previous(void);
+
+ /**
+ * Advances to the previous code point in the iteration range (toward
+ * startIndex()), and returns that code point. If there are no more
+ * code points to return, returns DONE.
+ * @return the previous code point in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UChar32 previous32(void);
+
+ /**
+ * Returns FALSE if there are no more code units or code points
+ * before the current position in the iteration range.
+ * This is used with previous() or previous32() in backward
+ * iteration.
+ * @return FALSE if there are no more code units or code points
+ * before the current position in the iteration range.
+ * @stable ICU 2.0
+ */
+ virtual UBool hasPrevious();
+
+ /**
+ * Moves the current position relative to the start or end of the
+ * iteration range, or relative to the current position itself.
+ * The movement is expressed in numbers of code units forward
+ * or backward by specifying a positive or negative delta.
+ * @param delta the position relative to origin. A positive delta means forward;
+ * a negative delta means backward.
+ * @param origin Origin enumeration {kStart, kCurrent, kEnd}
+ * @return the new position
+ * @stable ICU 2.0
+ */
+ virtual int32_t move(int32_t delta, EOrigin origin);
+
+ /**
+ * Moves the current position relative to the start or end of the
+ * iteration range, or relative to the current position itself.
+ * The movement is expressed in numbers of code points forward
+ * or backward by specifying a positive or negative delta.
+ * @param delta the position relative to origin. A positive delta means forward;
+ * a negative delta means backward.
+ * @param origin Origin enumeration {kStart, kCurrent, kEnd}
+ * @return the new position
+ * @stable ICU 2.0
+ */
+ virtual int32_t move32(int32_t delta, EOrigin origin);
+
+ /**
+ * Sets the iterator to iterate over a new range of text
+ * @stable ICU 2.0
+ */
+ void setText(const UChar* newText, int32_t newTextLength);
+
+ /**
+ * Copies the UChar array under iteration into the UnicodeString
+ * referred to by "result". Even if this iterator iterates across
+ * only a part of this string, the whole string is copied.
+ * @param result Receives a copy of the text under iteration.
+ * @stable ICU 2.0
+ */
+ virtual void getText(UnicodeString& result);
+
+ /**
+ * Return a class ID for this class (not really public)
+ * @return a class ID for this class
+ * @stable ICU 2.0
+ */
+ static UClassID U_EXPORT2 getStaticClassID(void);
+
+ /**
+ * Return a class ID for this object (not really public)
+ * @return a class ID for this object.
+ * @stable ICU 2.0
+ */
+ virtual UClassID getDynamicClassID(void) const;
+
+protected:
+ /**
+ * Protected constructor
+ * @stable ICU 2.0
+ */
+ UCharCharacterIterator();
+ /**
+ * Protected member text
+ * @stable ICU 2.0
+ */
+ const UChar* text;
+
+};
+
+U_NAMESPACE_END
+#endif