FM / unicode

/usr/include/unicode

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alphaindex.h	27118	0644	edit dl rm
appendable.h	8694	0644	edit dl rm
basictz.h	9491	0644	edit dl rm
brkiter.h	28464	0644	edit dl rm
bytestream.h	11037	0644	edit dl rm
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calendar.h	108278	0644	edit dl rm
caniter.h	7611	0644	edit dl rm
casemap.h	25933	0644	edit dl rm
char16ptr.h	7393	0644	edit dl rm
chariter.h	24632	0644	edit dl rm
choicfmt.h	24482	0644	edit dl rm
coleitr.h	14094	0644	edit dl rm
coll.h	57581	0644	edit dl rm
compactdecimalformat.h	7047	0644	edit dl rm
curramt.h	3851	0644	edit dl rm
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currunit.h	4094	0644	edit dl rm
datefmt.h	41641	0644	edit dl rm
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dtintrv.h	3930	0644	edit dl rm
dtitvfmt.h	47634	0644	edit dl rm
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dtptngen.h	26419	0644	edit dl rm
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gender.h	3408	0644	edit dl rm
gregocal.h	32472	0644	edit dl rm
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listformatter.h	9493	0644	edit dl rm
localebuilder.h	11502	0644	edit dl rm
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localpointer.h	19829	0644	edit dl rm
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measfmt.h	11603	0644	edit dl rm
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messagepattern.h	34521	0644	edit dl rm
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normalizer2.h	34851	0644	edit dl rm
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numberformatter.h	86276	0644	edit dl rm
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numfmt.h	50950	0644	edit dl rm
numsys.h	7500	0644	edit dl rm
parseerr.h	3155	0644	edit dl rm
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platform.h	28751	0644	edit dl rm
plurfmt.h	25800	0644	edit dl rm
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ptypes.h	3577	0644	edit dl rm
putil.h	6487	0644	edit dl rm
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regex.h	86367	0644	edit dl rm
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rep.h	9599	0644	edit dl rm
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schriter.h	6475	0644	edit dl rm
scientificnumberformatter.h	6553	0644	edit dl rm
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selfmt.h	14643	0644	edit dl rm
simpleformatter.h	12888	0644	edit dl rm
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sortkey.h	11444	0644	edit dl rm
std_string.h	1076	0644	edit dl rm
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stringoptions.h	5926	0644	edit dl rm
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tblcoll.h	37489	0644	edit dl rm
timezone.h	42005	0644	edit dl rm
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ubidi.h	91711	0644	edit dl rm
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ubrk.h	24547	0644	edit dl rm
ucal.h	58265	0644	edit dl rm
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ucat.h	5484	0644	edit dl rm
uchar.h	144630	0644	edit dl rm
ucharstrie.h	23120	0644	edit dl rm
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uchriter.h	13521	0644	edit dl rm
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ucol.h	62939	0644	edit dl rm
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uconfig.h	12356	0644	edit dl rm
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udat.h	62851	0644	edit dl rm
udata.h	15930	0644	edit dl rm
udateintervalformat.h	10995	0644	edit dl rm
udatpg.h	27447	0644	edit dl rm
udisplaycontext.h	6029	0644	edit dl rm
uenum.h	7970	0644	edit dl rm
ufieldpositer.h	4461	0644	edit dl rm
uformattable.h	11198	0644	edit dl rm
uformattedvalue.h	12413	0644	edit dl rm
ugender.h	2052	0644	edit dl rm
uidna.h	34169	0644	edit dl rm
uiter.h	23319	0644	edit dl rm
uldnames.h	10702	0644	edit dl rm
ulistformatter.h	11086	0644	edit dl rm
uloc.h	54432	0644	edit dl rm
ulocdata.h	11533	0644	edit dl rm
umachine.h	14884	0644	edit dl rm
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umsg.h	24812	0644	edit dl rm
umutablecptrie.h	8435	0644	edit dl rm
unifilt.h	4055	0644	edit dl rm
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unirepl.h	3464	0644	edit dl rm
uniset.h	66459	0644	edit dl rm
unistr.h	174523	0644	edit dl rm
unorm.h	21015	0644	edit dl rm
unorm2.h	25254	0644	edit dl rm
unum.h	54743	0644	edit dl rm
unumberformatter.h	25824	0644	edit dl rm
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uobject.h	10936	0644	edit dl rm
upluralrules.h	8013	0644	edit dl rm
uregex.h	73784	0644	edit dl rm
uregion.h	10073	0644	edit dl rm
ureldatefmt.h	17409	0644	edit dl rm
urename.h	134449	0644	edit dl rm
urep.h	5507	0644	edit dl rm
ures.h	37415	0644	edit dl rm
uscript.h	27867	0644	edit dl rm
usearch.h	39039	0644	edit dl rm
uset.h	40958	0644	edit dl rm
usetiter.h	9781	0644	edit dl rm
ushape.h	18432	0644	edit dl rm
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usprep.h	8331	0644	edit dl rm
ustdio.h	39469	0644	edit dl rm
ustream.h	1934	0644	edit dl rm
ustring.h	74211	0644	edit dl rm
ustringtrie.h	3224	0644	edit dl rm
utext.h	59527	0644	edit dl rm
utf.h	8046	0644	edit dl rm
utf8.h	31700	0644	edit dl rm
utf16.h	23878	0644	edit dl rm
utf32.h	763	0644	edit dl rm
utf_old.h	46929	0644	edit dl rm
utmscale.h	14113	0644	edit dl rm
utrace.h	17706	0644	edit dl rm
utrans.h	26130	0644	edit dl rm
utypes.h	31481	0644	edit dl rm
uvernum.h	6832	0644	edit dl rm
uversion.h	6145	0644	edit dl rm
vtzone.h	20784	0644	edit dl rm

Edit: /usr/include/unicode/udatpg.h (27447B)

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
*   Copyright (C) 2007-2015, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  udatpg.h
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2007jul30
*   created by: Markus W. Scherer
*/

#ifndef __UDATPG_H__
#define __UDATPG_H__

#include "unicode/utypes.h"
#include "unicode/udat.h"
#include "unicode/uenum.h"
#include "unicode/localpointer.h"

/**
 * \file
 * \brief C API: Wrapper for icu::DateTimePatternGenerator (unicode/dtptngen.h).
 *
 * UDateTimePatternGenerator provides flexible generation of date format patterns, 
 * like "yy-MM-dd". The user can build up the generator by adding successive 
 * patterns. Once that is done, a query can be made using a "skeleton", which is 
 * a pattern which just includes the desired fields and lengths. The generator 
 * will return the "best fit" pattern corresponding to that skeleton.
 * The main method people will use is udatpg_getBestPattern, since normally
 * UDateTimePatternGenerator is pre-built with data from a particular locale. 
 * However, generators can be built directly from other data as well.
 * Issue: may be useful to also have a function that returns the list of 
 * fields in a pattern, in order, since we have that internally.
 * That would be useful for getting the UI order of field elements.
 */

/**
 * Opaque type for a date/time pattern generator object.
 * @stable ICU 3.8
 */
typedef void *UDateTimePatternGenerator;

/**
 * Field number constants for udatpg_getAppendItemFormats() and similar functions.
 * These constants are separate from UDateFormatField despite semantic overlap
 * because some fields are merged for the date/time pattern generator.
 * @stable ICU 3.8
 */
typedef enum UDateTimePatternField {
    /** @stable ICU 3.8 */
    UDATPG_ERA_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_YEAR_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_QUARTER_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_MONTH_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_WEEK_OF_YEAR_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_WEEK_OF_MONTH_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_WEEKDAY_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_DAY_OF_YEAR_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_DAY_OF_WEEK_IN_MONTH_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_DAY_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_DAYPERIOD_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_HOUR_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_MINUTE_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_SECOND_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_FRACTIONAL_SECOND_FIELD,
    /** @stable ICU 3.8 */
    UDATPG_ZONE_FIELD,

/* Do not conditionalize the following with #ifndef U_HIDE_DEPRECATED_API,
     * it is needed for layout of DateTimePatternGenerator object. */
#ifndef U_FORCE_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal UDateTimePatternField value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    UDATPG_FIELD_COUNT
#endif  // U_FORCE_HIDE_DEPRECATED_API
} UDateTimePatternField;

/**
 * Field display name width constants for udatpg_getFieldDisplayName().
 * @stable ICU 61
 */
typedef enum UDateTimePGDisplayWidth {
    /** @stable ICU 61 */
    UDATPG_WIDE,
    /** @stable ICU 61 */
    UDATPG_ABBREVIATED,
    /** @stable ICU 61 */
    UDATPG_NARROW
} UDateTimePGDisplayWidth;

/**
 * Masks to control forcing the length of specified fields in the returned
 * pattern to match those in the skeleton (when this would not happen
 * otherwise). These may be combined to force the length of multiple fields.
 * Used with udatpg_getBestPatternWithOptions, udatpg_replaceFieldTypesWithOptions.
 * @stable ICU 4.4
 */
typedef enum UDateTimePatternMatchOptions {
 /** @stable ICU 4.4 */
 UDATPG_MATCH_NO_OPTIONS = 0,
 /** @stable ICU 4.4 */
 UDATPG_MATCH_HOUR_FIELD_LENGTH = 1 << UDATPG_HOUR_FIELD,
#ifndef U_HIDE_INTERNAL_API
 /** @internal ICU 4.4 */
 UDATPG_MATCH_MINUTE_FIELD_LENGTH = 1 << UDATPG_MINUTE_FIELD,
 /** @internal ICU 4.4 */
 UDATPG_MATCH_SECOND_FIELD_LENGTH = 1 << UDATPG_SECOND_FIELD,
#endif /* U_HIDE_INTERNAL_API */
 /** @stable ICU 4.4 */
 UDATPG_MATCH_ALL_FIELDS_LENGTH = (1 << UDATPG_FIELD_COUNT) - 1
} UDateTimePatternMatchOptions;

/**
 * Status return values from udatpg_addPattern().
 * @stable ICU 3.8
 */
typedef enum UDateTimePatternConflict {
    /** @stable ICU 3.8 */
    UDATPG_NO_CONFLICT,
    /** @stable ICU 3.8 */
    UDATPG_BASE_CONFLICT,
    /** @stable ICU 3.8 */
    UDATPG_CONFLICT,
#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal UDateTimePatternConflict value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    UDATPG_CONFLICT_COUNT
#endif  // U_HIDE_DEPRECATED_API
} UDateTimePatternConflict;

/**
  * Open a generator according to a given locale.
  * @param locale
  * @param pErrorCode a pointer to the UErrorCode which must not indicate a
  *                   failure before the function call.
  * @return a pointer to UDateTimePatternGenerator.
  * @stable ICU 3.8
  */
U_STABLE UDateTimePatternGenerator * U_EXPORT2
udatpg_open(const char *locale, UErrorCode *pErrorCode);

/**
  * Open an empty generator, to be constructed with udatpg_addPattern(...) etc.
  * @param pErrorCode a pointer to the UErrorCode which must not indicate a
  *                   failure before the function call.
  * @return a pointer to UDateTimePatternGenerator.
  * @stable ICU 3.8
  */
U_STABLE UDateTimePatternGenerator * U_EXPORT2
udatpg_openEmpty(UErrorCode *pErrorCode);

/**
  * Close a generator.
  * @param dtpg a pointer to UDateTimePatternGenerator.
  * @stable ICU 3.8
  */
U_STABLE void U_EXPORT2
udatpg_close(UDateTimePatternGenerator *dtpg);

#if U_SHOW_CPLUSPLUS_API

U_NAMESPACE_BEGIN

/**
 * \class LocalUDateTimePatternGeneratorPointer
 * "Smart pointer" class, closes a UDateTimePatternGenerator via udatpg_close().
 * For most methods see the LocalPointerBase base class.
 *
 * @see LocalPointerBase
 * @see LocalPointer
 * @stable ICU 4.4
 */
U_DEFINE_LOCAL_OPEN_POINTER(LocalUDateTimePatternGeneratorPointer, UDateTimePatternGenerator, udatpg_close);

U_NAMESPACE_END

#endif

/**
  * Create a copy pf a generator.
  * @param dtpg a pointer to UDateTimePatternGenerator to be copied.
  * @param pErrorCode a pointer to the UErrorCode which must not indicate a
  *                   failure before the function call.
  * @return a pointer to a new UDateTimePatternGenerator.
  * @stable ICU 3.8
 */
U_STABLE UDateTimePatternGenerator * U_EXPORT2
udatpg_clone(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);

/**
 * Get the best pattern matching the input skeleton. It is guaranteed to
 * have all of the fields in the skeleton.
 * 
 * Note that this function uses a non-const UDateTimePatternGenerator:
 * It uses a stateful pattern parser which is set up for each generator object,
 * rather than creating one for each function call.
 * Consecutive calls to this function do not affect each other,
 * but this function cannot be used concurrently on a single generator object.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param skeleton
 *            The skeleton is a pattern containing only the variable fields.
 *            For example, "MMMdd" and "mmhh" are skeletons.
 * @param length the length of skeleton
 * @param bestPattern
 *            The best pattern found from the given skeleton.
 * @param capacity the capacity of bestPattern.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                   failure before the function call.
 * @return the length of bestPattern.
 * @stable ICU 3.8
 */
U_STABLE int32_t U_EXPORT2
udatpg_getBestPattern(UDateTimePatternGenerator *dtpg,
                      const UChar *skeleton, int32_t length,
                      UChar *bestPattern, int32_t capacity,
                      UErrorCode *pErrorCode);

/**
 * Get the best pattern matching the input skeleton. It is guaranteed to
 * have all of the fields in the skeleton.
 * 
 * Note that this function uses a non-const UDateTimePatternGenerator:
 * It uses a stateful pattern parser which is set up for each generator object,
 * rather than creating one for each function call.
 * Consecutive calls to this function do not affect each other,
 * but this function cannot be used concurrently on a single generator object.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param skeleton
 *            The skeleton is a pattern containing only the variable fields.
 *            For example, "MMMdd" and "mmhh" are skeletons.
 * @param length the length of skeleton
 * @param options
 *            Options for forcing the length of specified fields in the
 *            returned pattern to match those in the skeleton (when this
 *            would not happen otherwise). For default behavior, use
 *            UDATPG_MATCH_NO_OPTIONS.
 * @param bestPattern
 *            The best pattern found from the given skeleton.
 * @param capacity
 *            the capacity of bestPattern.
 * @param pErrorCode
 *            a pointer to the UErrorCode which must not indicate a
 *            failure before the function call.
 * @return the length of bestPattern.
 * @stable ICU 4.4
 */
U_STABLE int32_t U_EXPORT2
udatpg_getBestPatternWithOptions(UDateTimePatternGenerator *dtpg,
                                 const UChar *skeleton, int32_t length,
                                 UDateTimePatternMatchOptions options,
                                 UChar *bestPattern, int32_t capacity,
                                 UErrorCode *pErrorCode);

/**
  * Get a unique skeleton from a given pattern. For example,
  * both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
  * 
  * Note that this function uses a non-const UDateTimePatternGenerator:
  * It uses a stateful pattern parser which is set up for each generator object,
  * rather than creating one for each function call.
  * Consecutive calls to this function do not affect each other,
  * but this function cannot be used concurrently on a single generator object.
  *
  * @param unusedDtpg     a pointer to UDateTimePatternGenerator.
  *    This parameter is no longer used. Callers may pass NULL.
  * @param pattern  input pattern, such as "dd/MMM".
  * @param length   the length of pattern.
  * @param skeleton such as "MMMdd"
  * @param capacity the capacity of skeleton.
  * @param pErrorCode a pointer to the UErrorCode which must not indicate a
  *                  failure before the function call.
  * @return the length of skeleton.
  * @stable ICU 3.8
  */
U_STABLE int32_t U_EXPORT2
udatpg_getSkeleton(UDateTimePatternGenerator *unusedDtpg,
                   const UChar *pattern, int32_t length,
                   UChar *skeleton, int32_t capacity,
                   UErrorCode *pErrorCode);

/**
 * Get a unique base skeleton from a given pattern. This is the same
 * as the skeleton, except that differences in length are minimized so
 * as to only preserve the difference between string and numeric form. So
 * for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
 * (notice the single d).
 *
 * Note that this function uses a non-const UDateTimePatternGenerator:
 * It uses a stateful pattern parser which is set up for each generator object,
 * rather than creating one for each function call.
 * Consecutive calls to this function do not affect each other,
 * but this function cannot be used concurrently on a single generator object.
 *
 * @param unusedDtpg     a pointer to UDateTimePatternGenerator.
 *    This parameter is no longer used. Callers may pass NULL.
 * @param pattern  input pattern, such as "dd/MMM".
 * @param length   the length of pattern.
 * @param baseSkeleton such as "Md"
 * @param capacity the capacity of base skeleton.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                  failure before the function call.
 * @return the length of baseSkeleton.
 * @stable ICU 3.8
 */
U_STABLE int32_t U_EXPORT2
udatpg_getBaseSkeleton(UDateTimePatternGenerator *unusedDtpg,
                       const UChar *pattern, int32_t length,
                       UChar *baseSkeleton, int32_t capacity,
                       UErrorCode *pErrorCode);

/**
 * Adds a pattern to the generator. If the pattern has the same skeleton as
 * an existing pattern, and the override parameter is set, then the previous
 * value is overriden. Otherwise, the previous value is retained. In either
 * case, the conflicting status is set and previous vale is stored in 
 * conflicting pattern.
 * 
 * Note that single-field patterns (like "MMM") are automatically added, and
 * don't need to be added explicitly!
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pattern input pattern, such as "dd/MMM"
 * @param patternLength the length of pattern.
 * @param override When existing values are to be overridden use true, 
 * otherwise use false.
 * @param conflictingPattern Previous pattern with the same skeleton.
 * @param capacity the capacity of conflictingPattern.
 * @param pLength a pointer to the length of conflictingPattern.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 * failure before the function call.
 * @return conflicting status. The value could be UDATPG_NO_CONFLICT, 
 * UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
 * @stable ICU 3.8
 */
U_STABLE UDateTimePatternConflict U_EXPORT2
udatpg_addPattern(UDateTimePatternGenerator *dtpg,
 const UChar *pattern, int32_t patternLength,
 UBool override,
 UChar *conflictingPattern, int32_t capacity, int32_t *pLength,
 UErrorCode *pErrorCode);

/**
 * An AppendItem format is a pattern used to append a field if there is no
 * good match. For example, suppose that the input skeleton is "GyyyyMMMd",
 * and there is no matching pattern internally, but there is a pattern
 * matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
 * G. The way these two are conjoined is by using the AppendItemFormat for G
 * (era). So if that value is, say "{0}, {1}" then the final resulting
 * pattern is "d-MM-yyyy, G".
 * 
 * There are actually three available variables: {0} is the pattern so far,
 * {1} is the element we are adding, and {2} is the name of the element.
 * 
 * This reflects the way that the CLDR data is organized.
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param field UDateTimePatternField, such as UDATPG_ERA_FIELD
 * @param value pattern, such as "{0}, {1}"
 * @param length the length of value.
 * @stable ICU 3.8
 */
U_STABLE void U_EXPORT2
udatpg_setAppendItemFormat(UDateTimePatternGenerator *dtpg,
 UDateTimePatternField field,
 const UChar *value, int32_t length);

/**
 * Getter corresponding to setAppendItemFormat. Values below 0 or at or
 * above UDATPG_FIELD_COUNT are illegal arguments.
 *
 * @param dtpg   A pointer to UDateTimePatternGenerator.
 * @param field  UDateTimePatternField, such as UDATPG_ERA_FIELD
 * @param pLength A pointer that will receive the length of appendItemFormat.
 * @return appendItemFormat for field.
 * @stable ICU 3.8
 */
U_STABLE const UChar * U_EXPORT2
udatpg_getAppendItemFormat(const UDateTimePatternGenerator *dtpg,
                           UDateTimePatternField field,
                           int32_t *pLength);

/**
 * Set the name of field, eg "era" in English for ERA. These are only
 * used if the corresponding AppendItemFormat is used, and if it contains a
 * {2} variable.
 * 
 * This reflects the way that the CLDR data is organized.
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param field UDateTimePatternField
 * @param value name for the field.
 * @param length the length of value.
 * @stable ICU 3.8
 */
U_STABLE void U_EXPORT2
udatpg_setAppendItemName(UDateTimePatternGenerator *dtpg,
 UDateTimePatternField field,
 const UChar *value, int32_t length);

/**
 * Getter corresponding to setAppendItemNames. Values below 0 or at or above
 * UDATPG_FIELD_COUNT are illegal arguments. Note: The more general function
 * for getting date/time field display names is udatpg_getFieldDisplayName.
 *
 * @param dtpg   a pointer to UDateTimePatternGenerator.
 * @param field  UDateTimePatternField, such as UDATPG_ERA_FIELD
 * @param pLength A pointer that will receive the length of the name for field.
 * @return name for field
 * @see udatpg_getFieldDisplayName
 * @stable ICU 3.8
 */
U_STABLE const UChar * U_EXPORT2
udatpg_getAppendItemName(const UDateTimePatternGenerator *dtpg,
                         UDateTimePatternField field,
                         int32_t *pLength);

/**
 * The general interface to get a display name for a particular date/time field,
 * in one of several possible display widths.
 *
 * @param dtpg
 *          A pointer to the UDateTimePatternGenerator object with the localized
 *          display names.
 * @param field
 *          The desired UDateTimePatternField, such as UDATPG_ERA_FIELD.
 * @param width
 *          The desired UDateTimePGDisplayWidth, such as UDATPG_ABBREVIATED.
 * @param fieldName
 *          A pointer to a buffer to receive the NULL-terminated display name. If the name
 *          fits into fieldName but cannot be  NULL-terminated (length == capacity) then
 *          the error code is set to U_STRING_NOT_TERMINATED_WARNING. If the name doesn't
 *          fit into fieldName then the error code is set to U_BUFFER_OVERFLOW_ERROR.
 * @param capacity
 *          The size of fieldName (in UChars).
 * @param pErrorCode
 *          A pointer to a UErrorCode to receive any errors
 * @return
 *         The full length of the name; if greater than capacity, fieldName contains a
 *         truncated result.
 * @stable ICU 61
 */
U_STABLE int32_t U_EXPORT2
udatpg_getFieldDisplayName(const UDateTimePatternGenerator *dtpg,
                           UDateTimePatternField field,
                           UDateTimePGDisplayWidth width,
                           UChar *fieldName, int32_t capacity,
                           UErrorCode *pErrorCode);

/**
 * The DateTimeFormat is a message format pattern used to compose date and
 * time patterns. The default pattern in the root locale is "{1} {0}", where
 * {1} will be replaced by the date pattern and {0} will be replaced by the
 * time pattern; however, other locales may specify patterns such as
 * "{1}, {0}" or "{1} 'at' {0}", etc.
 * 
 * This is used when the input skeleton contains both date and time fields,
 * but there is not a close match among the added patterns. For example,
 * suppose that this object was created by adding "dd-MMM" and "hh:mm", and
 * its DateTimeFormat is the default "{1} {0}". Then if the input skeleton
 * is "MMMdhmm", there is not an exact match, so the input skeleton is
 * broken up into two components "MMMd" and "hmm". There are close matches
 * for those two skeletons, so the result is put together with this pattern,
 * resulting in "d-MMM h:mm".
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param dtFormat
 * message format pattern, here {1} will be replaced by the date
 * pattern and {0} will be replaced by the time pattern.
 * @param length the length of dtFormat.
 * @stable ICU 3.8
 */
U_STABLE void U_EXPORT2
udatpg_setDateTimeFormat(const UDateTimePatternGenerator *dtpg,
 const UChar *dtFormat, int32_t length);

/**
 * Getter corresponding to setDateTimeFormat.
 * @param dtpg   a pointer to UDateTimePatternGenerator.
 * @param pLength A pointer that will receive the length of the format
 * @return dateTimeFormat.
 * @stable ICU 3.8
 */
U_STABLE const UChar * U_EXPORT2
udatpg_getDateTimeFormat(const UDateTimePatternGenerator *dtpg,
                         int32_t *pLength);

/**
 * The decimal value is used in formatting fractions of seconds. If the
 * skeleton contains fractional seconds, then this is used with the
 * fractional seconds. For example, suppose that the input pattern is
 * "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and
 * the decimal string is ",". Then the resulting pattern is modified to be
 * "H:mm:ss,SSSS"
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param decimal
 * @param length the length of decimal.
 * @stable ICU 3.8
 */
U_STABLE void U_EXPORT2
udatpg_setDecimal(UDateTimePatternGenerator *dtpg,
                  const UChar *decimal, int32_t length);

/**
 * Getter corresponding to setDecimal.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pLength A pointer that will receive the length of the decimal string.
 * @return corresponding to the decimal point.
 * @stable ICU 3.8
 */
U_STABLE const UChar * U_EXPORT2
udatpg_getDecimal(const UDateTimePatternGenerator *dtpg,
                  int32_t *pLength);

/**
 * Adjusts the field types (width and subtype) of a pattern to match what is
 * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
 * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
 * "dd-MMMM hh:mm". This is used internally to get the best match for the
 * input skeleton, but can also be used externally.
 *
 * Note that this function uses a non-const UDateTimePatternGenerator:
 * It uses a stateful pattern parser which is set up for each generator object,
 * rather than creating one for each function call.
 * Consecutive calls to this function do not affect each other,
 * but this function cannot be used concurrently on a single generator object.
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pattern Input pattern
 * @param patternLength the length of input pattern.
 * @param skeleton
 * @param skeletonLength the length of input skeleton.
 * @param dest  pattern adjusted to match the skeleton fields widths and subtypes.
 * @param destCapacity the capacity of dest.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                  failure before the function call.
 * @return the length of dest.
 * @stable ICU 3.8
 */
U_STABLE int32_t U_EXPORT2
udatpg_replaceFieldTypes(UDateTimePatternGenerator *dtpg,
                         const UChar *pattern, int32_t patternLength,
                         const UChar *skeleton, int32_t skeletonLength,
                         UChar *dest, int32_t destCapacity,
                         UErrorCode *pErrorCode);

/**
 * Adjusts the field types (width and subtype) of a pattern to match what is
 * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
 * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
 * "dd-MMMM hh:mm". This is used internally to get the best match for the
 * input skeleton, but can also be used externally.
 *
 * Note that this function uses a non-const UDateTimePatternGenerator:
 * It uses a stateful pattern parser which is set up for each generator object,
 * rather than creating one for each function call.
 * Consecutive calls to this function do not affect each other,
 * but this function cannot be used concurrently on a single generator object.
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pattern Input pattern
 * @param patternLength the length of input pattern.
 * @param skeleton
 * @param skeletonLength the length of input skeleton.
 * @param options
 *            Options controlling whether the length of specified fields in the
 *            pattern are adjusted to match those in the skeleton (when this
 *            would not happen otherwise). For default behavior, use
 *            UDATPG_MATCH_NO_OPTIONS.
 * @param dest  pattern adjusted to match the skeleton fields widths and subtypes.
 * @param destCapacity the capacity of dest.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                  failure before the function call.
 * @return the length of dest.
 * @stable ICU 4.4
 */
U_STABLE int32_t U_EXPORT2
udatpg_replaceFieldTypesWithOptions(UDateTimePatternGenerator *dtpg,
                                    const UChar *pattern, int32_t patternLength,
                                    const UChar *skeleton, int32_t skeletonLength,
                                    UDateTimePatternMatchOptions options,
                                    UChar *dest, int32_t destCapacity,
                                    UErrorCode *pErrorCode);

/**
 * Return a UEnumeration list of all the skeletons in canonical form.
 * Call udatpg_getPatternForSkeleton() to get the corresponding pattern.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                  failure before the function call
 * @return a UEnumeration list of all the skeletons
 *         The caller must close the object.
 * @stable ICU 3.8
 */
U_STABLE UEnumeration * U_EXPORT2
udatpg_openSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);

/**
 * Return a UEnumeration list of all the base skeletons in canonical form.
 *
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *             failure before the function call.
 * @return a UEnumeration list of all the base skeletons
 *             The caller must close the object.
 * @stable ICU 3.8
 */
U_STABLE UEnumeration * U_EXPORT2
udatpg_openBaseSkeletons(const UDateTimePatternGenerator *dtpg, UErrorCode *pErrorCode);

/**
 * Get the pattern corresponding to a given skeleton.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param skeleton 
 * @param skeletonLength pointer to the length of skeleton.
 * @param pLength pointer to the length of return pattern.
 * @return pattern corresponding to a given skeleton.
 * @stable ICU 3.8
 */
U_STABLE const UChar * U_EXPORT2
udatpg_getPatternForSkeleton(const UDateTimePatternGenerator *dtpg,
                             const UChar *skeleton, int32_t skeletonLength,
                             int32_t *pLength);

#if !UCONFIG_NO_FORMATTING

#ifndef U_HIDE_DRAFT_API
/**
 * Return the default hour cycle for a locale. Uses the locale that the
 * UDateTimePatternGenerator was initially created with.
 * 
 * Cannot be used on an empty UDateTimePatternGenerator instance.
 * 
 * @param dtpg a pointer to UDateTimePatternGenerator.
 * @param pErrorCode a pointer to the UErrorCode which must not indicate a
 *                   failure before the function call. Set to U_UNSUPPORTED_ERROR
 *                   if used on an empty instance.
 * @return the default hour cycle.
 * @draft ICU 67
 */
U_DRAFT UDateFormatHourCycle U_EXPORT2
udatpg_getDefaultHourCycle(const UDateTimePatternGenerator *dtpg, UErrorCode* pErrorCode);
#endif  /* U_HIDE_DRAFT_API */

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif

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