170 lines
4.2 KiB
C++
170 lines
4.2 KiB
C++
/*
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* Copyright © {1997-1999}, International Business Machines Corporation and others. All Rights Reserved.
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*******************************************************************************
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*
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* File PARSEPOS.H
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*
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* Modification History:
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*
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* Date Name Description
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* 07/09/97 helena Converted from java.
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* 07/17/98 stephen Added errorIndex support.
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* 05/11/99 stephen Cleaned up.
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*******************************************************************************
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*/
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#ifndef PARSEPOS_H
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#define PARSEPOS_H
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#include "utypes.h"
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/**
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* <code>ParsePosition</code> is a simple class used by <code>Format</code>
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* and its subclasses to keep track of the current position during parsing.
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* The <code>parseObject</code> method in the various <code>Format</code>
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* classes requires a <code>ParsePosition</code> object as an argument.
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*
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* <p>
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* By design, as you parse through a string with different formats,
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* you can use the same <code>ParsePosition</code>, since the index parameter
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* records the current position.
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*
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* @version 1.3 10/30/97
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* @author Mark Davis, Helena Shih
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* @see java.text.Format
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*/
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class U_I18N_API ParsePosition {
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public:
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/**
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* Default constructor, the index starts with 0 as default.
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*/
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ParsePosition()
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{ this->index = 0; this->errorIndex = -1; }
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/**
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* Create a new ParsePosition with the given initial index.
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* @param newIndex the new text offset.
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*/
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ParsePosition(UTextOffset newIndex)
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{ this->index = newIndex; this->errorIndex = -1; }
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/**
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* Copy constructor
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* @param copy the object to be copied from.
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*/
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ParsePosition(const ParsePosition& copy)
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{ this->index = copy.index; this->errorIndex = copy.errorIndex; }
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/**
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* Destructor
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*/
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~ParsePosition() {}
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/**
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* Assignment operator
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*/
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ParsePosition& operator=(const ParsePosition& copy);
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/**
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* Equality operator.
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* @return TRUE if the two parse positions are equal, FALSE otherwise.
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*/
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bool_t operator==(const ParsePosition& that) const;
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/**
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* Equality operator.
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* @return TRUE if the two parse positions are not equal, FALSE otherwise.
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*/
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bool_t operator!=(const ParsePosition& that) const;
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/**
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* Retrieve the current parse position. On input to a parse method, this
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* is the index of the character at which parsing will begin; on output, it
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* is the index of the character following the last character parsed.
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* @return the current index.
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*/
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UTextOffset getIndex(void) const;
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/**
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* Set the current parse position.
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* @param index the new index.
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*/
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void setIndex(UTextOffset index);
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/**
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* Set the index at which a parse error occurred. Formatters
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* should set this before returning an error code from their
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* parseObject method. The default value is -1 if this is not
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* set. */
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void setErrorIndex(UTextOffset ei);
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/**
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* Retrieve the index at which an error occurred, or -1 if the
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* error index has not been set. */
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UTextOffset getErrorIndex(void) const;
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private:
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/**
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* Input: the place you start parsing.
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* <br>Output: position where the parse stopped.
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* This is designed to be used serially,
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* with each call setting index up for the next one.
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*/
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UTextOffset index;
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/**
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* The index at which a parse error occurred.
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*/
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UTextOffset errorIndex;
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};
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inline ParsePosition&
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ParsePosition::operator=(const ParsePosition& copy)
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{
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index = copy.index;
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errorIndex = copy.errorIndex;
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return *this;
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}
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inline bool_t
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ParsePosition::operator==(const ParsePosition& copy) const
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{
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if(index != copy.index || errorIndex != copy.errorIndex)
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return FALSE;
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else
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return TRUE;
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}
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inline bool_t
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ParsePosition::operator!=(const ParsePosition& copy) const
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{
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return !operator==(copy);
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}
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inline UTextOffset
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ParsePosition::getIndex() const
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{
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return index;
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}
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inline void
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ParsePosition::setIndex(UTextOffset idx)
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{
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this->index = idx;
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}
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inline UTextOffset
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ParsePosition::getErrorIndex() const
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{
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return errorIndex;
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}
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inline void
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ParsePosition::setErrorIndex(UTextOffset ei)
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{
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this->errorIndex = ei;
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}
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#endif
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