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ufieldpositer.h
// © 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
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