You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
735 lines
24 KiB
735 lines
24 KiB
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
********************************************************************
|
|
*
|
|
* Copyright (C) 1997-2011, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*
|
|
********************************************************************
|
|
*/
|
|
|
|
#ifndef CHARITER_H
|
|
#define CHARITER_H
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if U_SHOW_CPLUSPLUS_API
|
|
|
|
#include "unicode/uobject.h"
|
|
#include "unicode/unistr.h"
|
|
/**
|
|
* \file
|
|
* \brief C++ API: Character Iterator
|
|
*/
|
|
|
|
U_NAMESPACE_BEGIN
|
|
/**
|
|
* Abstract class that defines an API for forward-only iteration
|
|
* on text objects.
|
|
* This is a minimal interface for iteration without random access
|
|
* or backwards iteration. It is especially useful for wrapping
|
|
* streams with converters into an object for collation or
|
|
* normalization.
|
|
*
|
|
* <p>Characters can be accessed in two ways: as code units or as
|
|
* code points.
|
|
* Unicode code points are 21-bit integers and are the scalar values
|
|
* of Unicode characters. ICU uses the type UChar32 for them.
|
|
* Unicode code units are the storage units of a given
|
|
* Unicode/UCS Transformation Format (a character encoding scheme).
|
|
* With UTF-16, all code points can be represented with either one
|
|
* or two code units ("surrogates").
|
|
* String storage is typically based on code units, while properties
|
|
* of characters are typically determined using code point values.
|
|
* Some processes may be designed to work with sequences of code units,
|
|
* or it may be known that all characters that are important to an
|
|
* algorithm can be represented with single code units.
|
|
* Other processes will need to use the code point access functions.</p>
|
|
*
|
|
* <p>ForwardCharacterIterator provides nextPostInc() to access
|
|
* a code unit and advance an internal position into the text object,
|
|
* similar to a <code>return text[position++]</code>.<br>
|
|
* It provides next32PostInc() to access a code point and advance an internal
|
|
* position.</p>
|
|
*
|
|
* <p>next32PostInc() assumes that the current position is that of
|
|
* the beginning of a code point, i.e., of its first code unit.
|
|
* After next32PostInc(), this will be true again.
|
|
* In general, access to code units and code points in the same
|
|
* iteration loop should not be mixed. In UTF-16, if the current position
|
|
* is on a second code unit (Low Surrogate), then only that code unit
|
|
* is returned even by next32PostInc().</p>
|
|
*
|
|
* <p>For iteration with either function, there are two ways to
|
|
* check for the end of the iteration. When there are no more
|
|
* characters in the text object:
|
|
* <ul>
|
|
* <li>The hasNext() function returns false.</li>
|
|
* <li>nextPostInc() and next32PostInc() return DONE
|
|
* when one attempts to read beyond the end of the text object.</li>
|
|
* </ul>
|
|
*
|
|
* Example:
|
|
* \code
|
|
* void function1(ForwardCharacterIterator &it) {
|
|
* UChar32 c;
|
|
* while(it.hasNext()) {
|
|
* c=it.next32PostInc();
|
|
* // use c
|
|
* }
|
|
* }
|
|
*
|
|
* void function1(ForwardCharacterIterator &it) {
|
|
* char16_t c;
|
|
* while((c=it.nextPostInc())!=ForwardCharacterIterator::DONE) {
|
|
* // use c
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* </p>
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
class U_COMMON_API ForwardCharacterIterator : public UObject {
|
|
public:
|
|
/**
|
|
* Value returned by most of ForwardCharacterIterator's functions
|
|
* when the iterator has reached the limits of its iteration.
|
|
* @stable ICU 2.0
|
|
*/
|
|
enum { DONE = 0xffff };
|
|
|
|
/**
|
|
* Destructor.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual ~ForwardCharacterIterator();
|
|
|
|
/**
|
|
* Returns true when both iterators refer to the same
|
|
* character in the same character-storage object.
|
|
* @param that The ForwardCharacterIterator to be compared for equality
|
|
* @return true when both iterators refer to the same
|
|
* character in the same character-storage object
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool operator==(const ForwardCharacterIterator& that) const = 0;
|
|
|
|
/**
|
|
* Returns true when the iterators refer to different
|
|
* text-storage objects, or to different characters in the
|
|
* same text-storage object.
|
|
* @param that The ForwardCharacterIterator to be compared for inequality
|
|
* @return true when the iterators refer to different
|
|
* text-storage objects, or to different characters in the
|
|
* same text-storage object
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline 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 = 0;
|
|
|
|
/**
|
|
* Returns a UClassID for this ForwardCharacterIterator ("poor man's
|
|
* RTTI").<P> Despite the fact that this function is public,
|
|
* DO NOT CONSIDER IT PART OF CHARACTERITERATOR'S API!
|
|
* @return a UClassID for this ForwardCharacterIterator
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UClassID getDynamicClassID(void) const = 0;
|
|
|
|
/**
|
|
* 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 char16_t nextPostInc(void) = 0;
|
|
|
|
/**
|
|
* 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 code point.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 next32PostInc(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @returns 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() = 0;
|
|
|
|
protected:
|
|
/** Default constructor to be overridden in the implementing class. @stable ICU 2.0*/
|
|
ForwardCharacterIterator();
|
|
|
|
/** Copy constructor to be overridden in the implementing class. @stable ICU 2.0*/
|
|
ForwardCharacterIterator(const ForwardCharacterIterator &other);
|
|
|
|
/**
|
|
* Assignment operator to be overridden in the implementing class.
|
|
* @stable ICU 2.0
|
|
*/
|
|
ForwardCharacterIterator &operator=(const ForwardCharacterIterator&) { return *this; }
|
|
};
|
|
|
|
/**
|
|
* Abstract class that defines an API for iteration
|
|
* on text objects.
|
|
* This is an interface for forward and backward iteration
|
|
* and random access into a text object.
|
|
*
|
|
* <p>The API provides backward compatibility to the Java and older ICU
|
|
* CharacterIterator classes but extends them significantly:
|
|
* <ol>
|
|
* <li>CharacterIterator is now a subclass of ForwardCharacterIterator.</li>
|
|
* <li>While the old API functions provided forward iteration with
|
|
* "pre-increment" semantics, the new one also provides functions
|
|
* with "post-increment" semantics. They are more efficient and should
|
|
* be the preferred iterator functions for new implementations.
|
|
* The backward iteration always had "pre-decrement" semantics, which
|
|
* are efficient.</li>
|
|
* <li>Just like ForwardCharacterIterator, it provides access to
|
|
* both code units and code points. Code point access versions are available
|
|
* for the old and the new iteration semantics.</li>
|
|
* <li>There are new functions for setting and moving the current position
|
|
* without returning a character, for efficiency.</li>
|
|
* </ol>
|
|
*
|
|
* See ForwardCharacterIterator for examples for using the new forward iteration
|
|
* functions. For backward iteration, there is also a hasPrevious() function
|
|
* that can be used analogously to hasNext().
|
|
* The old functions work as before and are shown below.</p>
|
|
*
|
|
* <p>Examples for some of the new functions:</p>
|
|
*
|
|
* Forward iteration with hasNext():
|
|
* \code
|
|
* void forward1(CharacterIterator &it) {
|
|
* UChar32 c;
|
|
* for(it.setToStart(); it.hasNext();) {
|
|
* c=it.next32PostInc();
|
|
* // use c
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* Forward iteration more similar to loops with the old forward iteration,
|
|
* showing a way to convert simple for() loops:
|
|
* \code
|
|
* void forward2(CharacterIterator &it) {
|
|
* char16_t c;
|
|
* for(c=it.firstPostInc(); c!=CharacterIterator::DONE; c=it.nextPostInc()) {
|
|
* // use c
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* Backward iteration with setToEnd() and hasPrevious():
|
|
* \code
|
|
* void backward1(CharacterIterator &it) {
|
|
* UChar32 c;
|
|
* for(it.setToEnd(); it.hasPrevious();) {
|
|
* c=it.previous32();
|
|
* // use c
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* Backward iteration with a more traditional for() loop:
|
|
* \code
|
|
* void backward2(CharacterIterator &it) {
|
|
* char16_t c;
|
|
* for(c=it.last(); c!=CharacterIterator::DONE; c=it.previous()) {
|
|
* // use c
|
|
* }
|
|
* }
|
|
* \endcode
|
|
*
|
|
* Example for random access:
|
|
* \code
|
|
* void random(CharacterIterator &it) {
|
|
* // set to the third code point from the beginning
|
|
* it.move32(3, CharacterIterator::kStart);
|
|
* // get a code point from here without moving the position
|
|
* UChar32 c=it.current32();
|
|
* // get the position
|
|
* int32_t pos=it.getIndex();
|
|
* // get the previous code unit
|
|
* char16_t u=it.previous();
|
|
* // move back one more code unit
|
|
* it.move(-1, CharacterIterator::kCurrent);
|
|
* // set the position back to where it was
|
|
* // and read the same code point c and move beyond it
|
|
* it.setIndex(pos);
|
|
* if(c!=it.next32PostInc()) {
|
|
* exit(1); // CharacterIterator inconsistent
|
|
* }
|
|
* }
|
|
* \endcode
|
|
*
|
|
* <p>Examples, especially for the old API:</p>
|
|
*
|
|
* Function processing characters, in this example simple output
|
|
* <pre>
|
|
* \code
|
|
* void processChar( char16_t c )
|
|
* {
|
|
* cout << " " << c;
|
|
* }
|
|
* \endcode
|
|
* </pre>
|
|
* Traverse the text from start to finish
|
|
* <pre>
|
|
* \code
|
|
* void traverseForward(CharacterIterator& iter)
|
|
* {
|
|
* for(char16_t c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
|
|
* processChar(c);
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* </pre>
|
|
* Traverse the text backwards, from end to start
|
|
* <pre>
|
|
* \code
|
|
* void traverseBackward(CharacterIterator& iter)
|
|
* {
|
|
* for(char16_t c = iter.last(); c != CharacterIterator.DONE; c = iter.previous()) {
|
|
* processChar(c);
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* </pre>
|
|
* Traverse both forward and backward from a given position in the text.
|
|
* Calls to notBoundary() in this example represents some additional stopping criteria.
|
|
* <pre>
|
|
* \code
|
|
* void traverseOut(CharacterIterator& iter, int32_t pos)
|
|
* {
|
|
* char16_t c;
|
|
* for (c = iter.setIndex(pos);
|
|
* c != CharacterIterator.DONE && (Unicode::isLetter(c) || Unicode::isDigit(c));
|
|
* c = iter.next()) {}
|
|
* int32_t end = iter.getIndex();
|
|
* for (c = iter.setIndex(pos);
|
|
* c != CharacterIterator.DONE && (Unicode::isLetter(c) || Unicode::isDigit(c));
|
|
* c = iter.previous()) {}
|
|
* int32_t start = iter.getIndex() + 1;
|
|
*
|
|
* cout << "start: " << start << " end: " << end << endl;
|
|
* for (c = iter.setIndex(start); iter.getIndex() < end; c = iter.next() ) {
|
|
* processChar(c);
|
|
* }
|
|
* }
|
|
* \endcode
|
|
* </pre>
|
|
* Creating a StringCharacterIterator and calling the test functions
|
|
* <pre>
|
|
* \code
|
|
* void CharacterIterator_Example( void )
|
|
* {
|
|
* cout << endl << "===== CharacterIterator_Example: =====" << endl;
|
|
* UnicodeString text("Ein kleiner Satz.");
|
|
* StringCharacterIterator iterator(text);
|
|
* cout << "----- traverseForward: -----------" << endl;
|
|
* traverseForward( iterator );
|
|
* cout << endl << endl << "----- traverseBackward: ----------" << endl;
|
|
* traverseBackward( iterator );
|
|
* cout << endl << endl << "----- traverseOut: ---------------" << endl;
|
|
* traverseOut( iterator, 7 );
|
|
* cout << endl << endl << "-----" << endl;
|
|
* }
|
|
* \endcode
|
|
* </pre>
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
class U_COMMON_API CharacterIterator : public ForwardCharacterIterator {
|
|
public:
|
|
/**
|
|
* Origin enumeration for the move() and move32() functions.
|
|
* @stable ICU 2.0
|
|
*/
|
|
enum EOrigin { kStart, kCurrent, kEnd };
|
|
|
|
/**
|
|
* Destructor.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual ~CharacterIterator();
|
|
|
|
/**
|
|
* Returns a pointer to a new CharacterIterator of the same
|
|
* concrete class as this one, and referring to the same
|
|
* character in the same text-storage object as this one. The
|
|
* caller is responsible for deleting the new clone.
|
|
* @return a pointer to a new CharacterIterator
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual CharacterIterator* clone() const = 0;
|
|
|
|
/**
|
|
* 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 char16_t first(void) = 0;
|
|
|
|
/**
|
|
* 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 char16_t 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) = 0;
|
|
|
|
/**
|
|
* 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 first code unit or code point in its
|
|
* iteration range. This can be used to begin a forward
|
|
* iteration with nextPostInc() or next32PostInc().
|
|
* @return the start position of the iteration range
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t setToStart();
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual char16_t last(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 last32(void) = 0;
|
|
|
|
/**
|
|
* Sets the iterator to the end of its iteration range, just behind
|
|
* the last code unit or code point. This can be used to begin a backward
|
|
* iteration with previous() or previous32().
|
|
* @return the end position of the iteration range
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t setToEnd();
|
|
|
|
/**
|
|
* 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"-th code unit in the text-storage object
|
|
* @return the "position"-th code unit.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual char16_t setIndex(int32_t position) = 0;
|
|
|
|
/**
|
|
* 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"-th code unit in the text-storage object
|
|
* @return the "position"-th code point.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 setIndex32(int32_t position) = 0;
|
|
|
|
/**
|
|
* Returns the code unit the iterator currently refers to.
|
|
* @return the current code unit.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual char16_t current(void) const = 0;
|
|
|
|
/**
|
|
* Returns the code point the iterator currently refers to.
|
|
* @return the current code point.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 current32(void) const = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual char16_t next(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 next32(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual char16_t previous(void) = 0;
|
|
|
|
/**
|
|
* 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.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UChar32 previous32(void) = 0;
|
|
|
|
/**
|
|
* 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, return true otherwise.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual UBool hasPrevious() = 0;
|
|
|
|
/**
|
|
* Returns the numeric index in the underlying text-storage
|
|
* object of the character returned by first(). Since it's
|
|
* possible to create an iterator that iterates across only
|
|
* part of a text-storage object, this number isn't
|
|
* necessarily 0.
|
|
* @returns the numeric index in the underlying text-storage
|
|
* object of the character returned by first().
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t startIndex(void) const;
|
|
|
|
/**
|
|
* Returns the numeric index in the underlying text-storage
|
|
* object of the position immediately BEYOND the character
|
|
* returned by last().
|
|
* @return the numeric index in the underlying text-storage
|
|
* object of the position immediately BEYOND the character
|
|
* returned by last().
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t endIndex(void) const;
|
|
|
|
/**
|
|
* Returns the numeric index in the underlying text-storage
|
|
* object of the character the iterator currently refers to
|
|
* (i.e., the character returned by current()).
|
|
* @return the numeric index in the text-storage object of
|
|
* the character the iterator currently refers to
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t getIndex(void) const;
|
|
|
|
/**
|
|
* Returns the length of the entire text in the underlying
|
|
* text-storage object.
|
|
* @return the length of the entire text in the text-storage object
|
|
* @stable ICU 2.0
|
|
*/
|
|
inline int32_t getLength() const;
|
|
|
|
/**
|
|
* 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) = 0;
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
#ifdef move32
|
|
// One of the system headers right now is sometimes defining a conflicting macro we don't use
|
|
#undef move32
|
|
#endif
|
|
virtual int32_t move32(int32_t delta, EOrigin origin) = 0;
|
|
|
|
/**
|
|
* Copies the text under iteration into the UnicodeString
|
|
* referred to by "result".
|
|
* @param result Receives a copy of the text under iteration.
|
|
* @stable ICU 2.0
|
|
*/
|
|
virtual void getText(UnicodeString& result) = 0;
|
|
|
|
protected:
|
|
/**
|
|
* Empty constructor.
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator();
|
|
|
|
/**
|
|
* Constructor, just setting the length field in this base class.
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator(int32_t length);
|
|
|
|
/**
|
|
* Constructor, just setting the length and position fields in this base class.
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator(int32_t length, int32_t position);
|
|
|
|
/**
|
|
* Constructor, just setting the length, start, end, and position fields in this base class.
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator(int32_t length, int32_t textBegin, int32_t textEnd, int32_t position);
|
|
|
|
/**
|
|
* Copy constructor.
|
|
*
|
|
* @param that The CharacterIterator to be copied
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator(const CharacterIterator &that);
|
|
|
|
/**
|
|
* Assignment operator. Sets this CharacterIterator to have the same behavior,
|
|
* as the one passed in.
|
|
* @param that The CharacterIterator passed in.
|
|
* @return the newly set CharacterIterator.
|
|
* @stable ICU 2.0
|
|
*/
|
|
CharacterIterator &operator=(const CharacterIterator &that);
|
|
|
|
/**
|
|
* Base class text length field.
|
|
* Necessary this for correct getText() and hashCode().
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t textLength;
|
|
|
|
/**
|
|
* Base class field for the current position.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t pos;
|
|
|
|
/**
|
|
* Base class field for the start of the iteration range.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t begin;
|
|
|
|
/**
|
|
* Base class field for the end of the iteration range.
|
|
* @stable ICU 2.0
|
|
*/
|
|
int32_t end;
|
|
};
|
|
|
|
inline UBool
|
|
ForwardCharacterIterator::operator!=(const ForwardCharacterIterator& that) const {
|
|
return !operator==(that);
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::setToStart() {
|
|
return move(0, kStart);
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::setToEnd() {
|
|
return move(0, kEnd);
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::startIndex(void) const {
|
|
return begin;
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::endIndex(void) const {
|
|
return end;
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::getIndex(void) const {
|
|
return pos;
|
|
}
|
|
|
|
inline int32_t
|
|
CharacterIterator::getLength(void) const {
|
|
return textLength;
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* U_SHOW_CPLUSPLUS_API */
|
|
|
|
#endif
|