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| -rw-r--r-- | intl/icu/source/common/unicode/parsepos.h | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/intl/icu/source/common/unicode/parsepos.h b/intl/icu/source/common/unicode/parsepos.h new file mode 100644 index 0000000000..d33a812ad0 --- /dev/null +++ b/intl/icu/source/common/unicode/parsepos.h @@ -0,0 +1,237 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +* Copyright (C) 1997-2005, International Business Machines Corporation and others. All Rights Reserved. +******************************************************************************* +* +* File PARSEPOS.H +* +* Modification History: +* +* Date Name Description +* 07/09/97 helena Converted from java. +* 07/17/98 stephen Added errorIndex support. +* 05/11/99 stephen Cleaned up. +******************************************************************************* +*/ + +#ifndef PARSEPOS_H +#define PARSEPOS_H + +#include "unicode/utypes.h" + +#if U_SHOW_CPLUSPLUS_API + +#include "unicode/uobject.h" + + +U_NAMESPACE_BEGIN + +/** + * \file + * \brief C++ API: Canonical Iterator + */ +/** + * <code>ParsePosition</code> is a simple class used by <code>Format</code> + * and its subclasses to keep track of the current position during parsing. + * The <code>parseObject</code> method in the various <code>Format</code> + * classes requires a <code>ParsePosition</code> object as an argument. + * + * <p> + * By design, as you parse through a string with different formats, + * you can use the same <code>ParsePosition</code>, since the index parameter + * records the current position. + * + * The ParsePosition class is not suitable for subclassing. + * + * @version 1.3 10/30/97 + * @author Mark Davis, Helena Shih + * @see java.text.Format + */ + +class U_COMMON_API ParsePosition : public UObject { +public: + /** + * Default constructor, the index starts with 0 as default. + * @stable ICU 2.0 + */ + ParsePosition() + : UObject(), + index(0), + errorIndex(-1) + {} + + /** + * Create a new ParsePosition with the given initial index. + * @param newIndex the new text offset. + * @stable ICU 2.0 + */ + ParsePosition(int32_t newIndex) + : UObject(), + index(newIndex), + errorIndex(-1) + {} + + /** + * Copy constructor + * @param copy the object to be copied from. + * @stable ICU 2.0 + */ + ParsePosition(const ParsePosition& copy) + : UObject(copy), + index(copy.index), + errorIndex(copy.errorIndex) + {} + + /** + * Destructor + * @stable ICU 2.0 + */ + virtual ~ParsePosition(); + + /** + * Assignment operator + * @stable ICU 2.0 + */ + inline ParsePosition& operator=(const ParsePosition& copy); + + /** + * Equality operator. + * @return true if the two parse positions are equal, false otherwise. + * @stable ICU 2.0 + */ + inline bool operator==(const ParsePosition& that) const; + + /** + * Equality operator. + * @return true if the two parse positions are not equal, false otherwise. + * @stable ICU 2.0 + */ + inline bool operator!=(const ParsePosition& that) const; + + /** + * Clone this object. + * Clones can be used concurrently in multiple threads. + * If an error occurs, then nullptr is returned. + * The caller must delete the clone. + * + * @return a clone of this object + * + * @see getDynamicClassID + * @stable ICU 2.8 + */ + ParsePosition *clone() const; + + /** + * Retrieve the current parse position. On input to a parse method, this + * is the index of the character at which parsing will begin; on output, it + * is the index of the character following the last character parsed. + * @return the current index. + * @stable ICU 2.0 + */ + inline int32_t getIndex(void) const; + + /** + * Set the current parse position. + * @param index the new index. + * @stable ICU 2.0 + */ + inline void setIndex(int32_t index); + + /** + * Set the index at which a parse error occurred. Formatters + * should set this before returning an error code from their + * parseObject method. The default value is -1 if this is not + * set. + * @stable ICU 2.0 + */ + inline void setErrorIndex(int32_t ei); + + /** + * Retrieve the index at which an error occurred, or -1 if the + * error index has not been set. + * @stable ICU 2.0 + */ + inline int32_t getErrorIndex(void) const; + + /** + * ICU "poor man's RTTI", returns a UClassID for this class. + * + * @stable ICU 2.2 + */ + static UClassID U_EXPORT2 getStaticClassID(); + + /** + * ICU "poor man's RTTI", returns a UClassID for the actual class. + * + * @stable ICU 2.2 + */ + virtual UClassID getDynamicClassID() const override; + +private: + /** + * Input: the place you start parsing. + * <br>Output: position where the parse stopped. + * This is designed to be used serially, + * with each call setting index up for the next one. + */ + int32_t index; + + /** + * The index at which a parse error occurred. + */ + int32_t errorIndex; + +}; + +inline ParsePosition& +ParsePosition::operator=(const ParsePosition& copy) +{ + index = copy.index; + errorIndex = copy.errorIndex; + return *this; +} + +inline bool +ParsePosition::operator==(const ParsePosition& copy) const +{ + if(index != copy.index || errorIndex != copy.errorIndex) + return false; + else + return true; +} + +inline bool +ParsePosition::operator!=(const ParsePosition& copy) const +{ + return !operator==(copy); +} + +inline int32_t +ParsePosition::getIndex() const +{ + return index; +} + +inline void +ParsePosition::setIndex(int32_t offset) +{ + this->index = offset; +} + +inline int32_t +ParsePosition::getErrorIndex() const +{ + return errorIndex; +} + +inline void +ParsePosition::setErrorIndex(int32_t ei) +{ + this->errorIndex = ei; +} +U_NAMESPACE_END + +#endif /* U_SHOW_CPLUSPLUS_API */ + +#endif |