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// Copyright (C) 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
* Copyright (C) 1998-2005, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
*
* File schriter.h
*
* Modification History:
*
* Date Name Description
* 05/05/99 stephen Cleaned up.
******************************************************************************
*/
#ifndef SCHRITER_H
#define SCHRITER_H
#include "unicode/utypes.h"
#include "unicode/chariter.h"
#include "unicode/uchriter.h"
/**
* \file
* \brief C++ API: String Character Iterator
*/
U_NAMESPACE_BEGIN
/**
* A concrete subclass of CharacterIterator that iterates over the
* characters (code units or code points) in a UnicodeString.
* It's possible not only to create an
* iterator that iterates over an entire UnicodeString, but also to
* create one that iterates over only a subrange of a UnicodeString
* (iterators over different subranges of the same UnicodeString don't
* compare equal).
* @see CharacterIterator
* @see ForwardCharacterIterator
* @stable ICU 2.0
*/
class U_COMMON_API StringCharacterIterator : public UCharCharacterIterator {
public:
/**
* Create an iterator over the UnicodeString referred to by "textStr".
* The UnicodeString object is copied.
* The iteration range is the whole string, and the starting position is 0.
* @param textStr The unicode string used to create an iterator
* @stable ICU 2.0
*/
StringCharacterIterator(const UnicodeString& textStr);
/**
* Create an iterator over the UnicodeString referred to by "textStr".
* The iteration range is the whole string, and the starting
* position is specified by "textPos". If "textPos" is outside the valid
* iteration range, the behavior of this object is undefined.
* @param textStr The unicode string used to create an iterator
* @param textPos The starting position of the iteration
* @stable ICU 2.0
*/
StringCharacterIterator(const UnicodeString& textStr,
int32_t textPos);
/**
* Create an iterator over the UnicodeString referred to by "textStr".
* The UnicodeString object is copied.
* The iteration range begins with the code unit specified by
* "textBegin" and ends with the code unit BEFORE the code unit specfied
* by "textEnd". The starting position is specified by "textPos". If
* "textBegin" and "textEnd" don't form a valid range on "text" (i.e.,
* textBegin >= textEnd or either is negative or greater than text.size()),
* or "textPos" is outside the range defined by "textBegin" and "textEnd",
* the behavior of this iterator is undefined.
* @param textStr The unicode string used to create the StringCharacterIterator
* @param textBegin The begin position of the iteration range
* @param textEnd The end position of the iteration range
* @param textPos The starting position of the iteration
* @stable ICU 2.0
*/
StringCharacterIterator(const UnicodeString& textStr,
int32_t textBegin,
int32_t textEnd,
int32_t textPos);
/**
* 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.
* The UnicodeString object in "that" is copied.
* @param that The StringCharacterIterator to be copied
* @stable ICU 2.0
*/
StringCharacterIterator(const StringCharacterIterator& that);
/**
* Destructor.
* @stable ICU 2.0
*/
virtual ~StringCharacterIterator();
/**
* Assignment operator. *this is altered to iterate over the same
* 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
*/
StringCharacterIterator&
operator=(const StringCharacterIterator& 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 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;
/**
* Returns a new StringCharacterIterator 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 newly cloned object.
* @stable ICU 2.0
*/
virtual CharacterIterator* clone(void) const;
/**
* Sets the iterator to iterate over the provided string.
* @param newText The string to be iterated over
* @stable ICU 2.0
*/
void setText(const UnicodeString& newText);
/**
* Copies the UnicodeString 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 object (not really public)
* @return a class ID for this object.
* @stable ICU 2.0
*/
virtual UClassID getDynamicClassID(void) const;
/**
* 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);
protected:
/**
* Default constructor, iteration over empty string.
* @stable ICU 2.0
*/
StringCharacterIterator();
/**
* Sets the iterator to iterate over the provided string.
* @param newText The string to be iterated over
* @param newTextLength The length of the String
* @stable ICU 2.0
*/
void setText(const UChar* newText, int32_t newTextLength);
/**
* Copy of the iterated string object.
* @stable ICU 2.0
*/
UnicodeString text;
};
U_NAMESPACE_END
#endif
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