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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*****************************************************************************************
* Copyright (C) 2015-2016, International Business Machines
* Corporation and others. All Rights Reserved.
*****************************************************************************************
*/
#ifndef UFIELDPOSITER_H
#define UFIELDPOSITER_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/localpointer.h"
/**
* \file
* \brief C API: UFieldPositionIterator for use with format APIs.
*
* Usage:
* ufieldpositer_open creates an empty (unset) UFieldPositionIterator.
* This can be passed to format functions such as {@link #udat_formatForFields},
* which will set it to apply to the fields in a particular formatted string.
* ufieldpositer_next can then be used to iterate over those fields,
* providing for each field its type (using values that are specific to the
* particular format type, such as date or number formats), as well as the
* start and end positions of the field in the formatted string.
* A given UFieldPositionIterator can be re-used for different format calls;
* each such call resets it to apply to that format string.
* ufieldpositer_close should be called to dispose of the UFieldPositionIterator
* when it is no longer needed.
*
* @see FieldPositionIterator
*/
/**
* Opaque UFieldPositionIterator object for use in C.
* @stable ICU 55
*/
struct UFieldPositionIterator;
typedef struct UFieldPositionIterator UFieldPositionIterator; /**< C typedef for struct UFieldPositionIterator. @stable ICU 55 */
/**
* Open a new, unset UFieldPositionIterator object.
* @param status
* A pointer to a UErrorCode to receive any errors.
* @return
* A pointer to an empty (unset) UFieldPositionIterator object,
* or NULL if an error occurred.
* @stable ICU 55
*/
U_STABLE UFieldPositionIterator* U_EXPORT2
ufieldpositer_open(UErrorCode* status);
/**
* Close a UFieldPositionIterator object. Once closed it may no longer be used.
* @param fpositer
* A pointer to the UFieldPositionIterator object to close.
* @stable ICU 55
*/
U_STABLE void U_EXPORT2
ufieldpositer_close(UFieldPositionIterator *fpositer);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUFieldPositionIteratorPointer
* "Smart pointer" class, closes a UFieldPositionIterator via ufieldpositer_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 55
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUFieldPositionIteratorPointer, UFieldPositionIterator, ufieldpositer_close);
U_NAMESPACE_END
#endif
/**
* Get information for the next field in the formatted string to which this
* UFieldPositionIterator currently applies, or return a negative value if there
* are no more fields.
* @param fpositer
* A pointer to the UFieldPositionIterator object containing iteration
* state for the format fields.
* @param beginIndex
* A pointer to an int32_t to receive information about the start offset
* of the field in the formatted string (undefined if the function
* returns a negative value). May be NULL if this information is not needed.
* @param endIndex
* A pointer to an int32_t to receive information about the end offset
* of the field in the formatted string (undefined if the function
* returns a negative value). May be NULL if this information is not needed.
* @return
* The field type (non-negative value), or a negative value if there are
* no more fields for which to provide information. If negative, then any
* values pointed to by beginIndex and endIndex are undefined.
*
* The values for field type depend on what type of formatter the
* UFieldPositionIterator has been set by; for a date formatter, the
* values from the UDateFormatField enum. For more information, see the
* descriptions of format functions that take a UFieldPositionIterator*
* parameter, such as {@link #udat_formatForFields}.
*
* @stable ICU 55
*/
U_STABLE int32_t U_EXPORT2
ufieldpositer_next(UFieldPositionIterator *fpositer,
int32_t *beginIndex, int32_t *endIndex);
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif