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ICU 77.1: i18n/unicode/ufieldpositer.h File Reference

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 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 also

FieldPositionIterator

Definition in file ufieldpositer.h.

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.

Parameters

fpositer A pointer to the UFieldPositionIterator object containing iteration state for the format fields. 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. 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.

Returns

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 udat_formatForFields.

Stable:

ICU 55

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