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+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2010, International Business Machines
+ * Corporation and others. All Rights Reserved.
+ *******************************************************************************
+*/
+
+#ifndef UDAT_H
+#define UDAT_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/localpointer.h"
+#include "unicode/ucal.h"
+#include "unicode/unum.h"
+/**
+ * \file
+ * \brief C API: DateFormat
+ *
+ * <h2> Date Format C API</h2>
+ *
+ * Date Format C API consists of functions that convert dates and
+ * times from their internal representations to textual form and back again in a
+ * language-independent manner. Converting from the internal representation (milliseconds
+ * since midnight, January 1, 1970) to text is known as "formatting," and converting
+ * from text to millis is known as "parsing." We currently define only one concrete
+ * structure UDateFormat, which can handle pretty much all normal
+ * date formatting and parsing actions.
+ * <P>
+ * Date Format helps you to format and parse dates for any locale. Your code can
+ * be completely independent of the locale conventions for months, days of the
+ * week, or even the calendar format: lunar vs. solar.
+ * <P>
+ * To format a date for the current Locale with default time and date style,
+ * use one of the static factory methods:
+ * <pre>
+ * \code
+ * UErrorCode status = U_ZERO_ERROR;
+ * UChar *myString;
+ * int32_t myStrlen = 0;
+ * UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, -1, &status);
+ * myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, NULL, &status);
+ * if (status==U_BUFFER_OVERFLOW_ERROR){
+ * status=U_ZERO_ERROR;
+ * myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
+ * udat_format(dfmt, myDate, myString, myStrlen+1, NULL, &status);
+ * }
+ * \endcode
+ * </pre>
+ * If you are formatting multiple numbers, it is more efficient to get the
+ * format and use it multiple times so that the system doesn't have to fetch the
+ * information about the local language and country conventions multiple times.
+ * <pre>
+ * \code
+ * UErrorCode status = U_ZERO_ERROR;
+ * int32_t i, myStrlen = 0;
+ * UChar* myString;
+ * char buffer[1024];
+ * UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values
+ * UDateFormat* df = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, 0, &status);
+ * for (i = 0; i < 3; i++) {
+ * myStrlen = udat_format(df, myDateArr[i], NULL, myStrlen, NULL, &status);
+ * if(status == U_BUFFER_OVERFLOW_ERROR){
+ * status = U_ZERO_ERROR;
+ * myString = (UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
+ * udat_format(df, myDateArr[i], myString, myStrlen+1, NULL, &status);
+ * printf("%s\n", u_austrcpy(buffer, myString) );
+ * free(myString);
+ * }
+ * }
+ * \endcode
+ * </pre>
+ * To get specific fields of a date, you can use UFieldPosition to
+ * get specific fields.
+ * <pre>
+ * \code
+ * UErrorCode status = U_ZERO_ERROR;
+ * UFieldPosition pos;
+ * UChar *myString;
+ * int32_t myStrlen = 0;
+ * char buffer[1024];
+ *
+ * pos.field = 1; // Same as the DateFormat::EField enum
+ * UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, -1, NULL, 0, &status);
+ * myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, &pos, &status);
+ * if (status==U_BUFFER_OVERFLOW_ERROR){
+ * status=U_ZERO_ERROR;
+ * myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
+ * udat_format(dfmt, myDate, myString, myStrlen+1, &pos, &status);
+ * }
+ * printf("date format: %s\n", u_austrcpy(buffer, myString));
+ * buffer[pos.endIndex] = 0; // NULL terminate the string.
+ * printf("UFieldPosition position equals %s\n", &buffer[pos.beginIndex]);
+ * \endcode
+ * </pre>
+ * To format a date for a different Locale, specify it in the call to
+ * udat_open()
+ * <pre>
+ * \code
+ * UDateFormat* df = udat_open(UDAT_SHORT, UDAT_SHORT, "fr_FR", NULL, -1, NULL, 0, &status);
+ * \endcode
+ * </pre>
+ * You can use a DateFormat API udat_parse() to parse.
+ * <pre>
+ * \code
+ * UErrorCode status = U_ZERO_ERROR;
+ * int32_t parsepos=0;
+ * UDate myDate = udat_parse(df, myString, u_strlen(myString), &parsepos, &status);
+ * \endcode
+ * </pre>
+ * You can pass in different options for the arguments for date and time style
+ * to control the length of the result; from SHORT to MEDIUM to LONG to FULL.
+ * The exact result depends on the locale, but generally:
+ * see UDateFormatStyle for more details
+ * <ul type=round>
+ * <li> UDAT_SHORT is completely numeric, such as 12/13/52 or 3:30pm
+ * <li> UDAT_MEDIUM is longer, such as Jan 12, 1952
+ * <li> UDAT_LONG is longer, such as January 12, 1952 or 3:30:32pm
+ * <li> UDAT_FULL is pretty completely specified, such as
+ * Tuesday, April 12, 1952 AD or 3:30:42pm PST.
+ * </ul>
+ * You can also set the time zone on the format if you wish.
+ * <P>
+ * You can also use forms of the parse and format methods with Parse Position and
+ * UFieldPosition to allow you to
+ * <ul type=round>
+ * <li> Progressively parse through pieces of a string.
+ * <li> Align any particular field, or find out where it is for selection
+ * on the screen.
+ * </ul>
+ */
+
+/** A date formatter.
+ * For usage in C programs.
+ * @stable ICU 2.6
+ */
+typedef void* UDateFormat;
+
+/** The possible date/time format styles
+ * @stable ICU 2.6
+ */
+typedef enum UDateFormatStyle {
+ /** Full style */
+ UDAT_FULL,
+ /** Long style */
+ UDAT_LONG,
+ /** Medium style */
+ UDAT_MEDIUM,
+ /** Short style */
+ UDAT_SHORT,
+ /** Default style */
+ UDAT_DEFAULT = UDAT_MEDIUM,
+
+ /** Bitfield for relative date */
+ UDAT_RELATIVE = (1 << 7),
+
+ UDAT_FULL_RELATIVE = UDAT_FULL | UDAT_RELATIVE,
+
+ UDAT_LONG_RELATIVE = UDAT_LONG | UDAT_RELATIVE,
+
+ UDAT_MEDIUM_RELATIVE = UDAT_MEDIUM | UDAT_RELATIVE,
+
+ UDAT_SHORT_RELATIVE = UDAT_SHORT | UDAT_RELATIVE,
+
+
+ /** No style */
+ UDAT_NONE = -1,
+ /** for internal API use only */
+ UDAT_IGNORE = -2
+
+} UDateFormatStyle;
+
+
+/**
+ * @{
+ * Below are a set of pre-defined skeletons.
+ *
+ * <P>
+ * A skeleton
+ * <ol>
+ * <li>
+ * only keeps the field pattern letter and ignores all other parts
+ * in a pattern, such as space, punctuations, and string literals.
+ * </li>
+ * <li>
+ * hides the order of fields.
+ * </li>
+ * <li>
+ * might hide a field's pattern letter length.
+ *
+ * For those non-digit calendar fields, the pattern letter length is
+ * important, such as MMM, MMMM, and MMMMM; EEE and EEEE,
+ * and the field's pattern letter length is honored.
+ *
+ * For the digit calendar fields, such as M or MM, d or dd, yy or yyyy,
+ * the field pattern length is ignored and the best match, which is defined
+ * in date time patterns, will be returned without honor the field pattern
+ * letter length in skeleton.
+ * </li>
+ * </ol>
+ *
+ * @stable ICU 4.0
+ */
+
+#define UDAT_MINUTE_SECOND "ms"
+#define UDAT_HOUR24_MINUTE "Hm"
+#define UDAT_HOUR24_MINUTE_SECOND "Hms"
+#define UDAT_HOUR_MINUTE_SECOND "hms"
+#define UDAT_STANDALONE_MONTH "LLLL"
+#define UDAT_ABBR_STANDALONE_MONTH "LLL"
+#define UDAT_YEAR_QUARTER "yQQQ"
+#define UDAT_YEAR_ABBR_QUARTER "yQ"
+
+/** @} */
+
+/**
+ * @{
+ * Below are a set of pre-defined skeletons that
+ * have pre-defined interval patterns in resource files.
+ * Users are encouraged to use them in date interval format factory methods.
+ *
+ * @stable ICU 4.0
+ */
+#define UDAT_HOUR_MINUTE "hm"
+#define UDAT_YEAR "y"
+#define UDAT_DAY "d"
+#define UDAT_NUM_MONTH_WEEKDAY_DAY "MEd"
+#define UDAT_YEAR_NUM_MONTH "yM"
+#define UDAT_NUM_MONTH_DAY "Md"
+#define UDAT_YEAR_NUM_MONTH_WEEKDAY_DAY "yMEd"
+#define UDAT_ABBR_MONTH_WEEKDAY_DAY "MMMEd"
+#define UDAT_YEAR_MONTH "yMMMM"
+#define UDAT_YEAR_ABBR_MONTH "yMMM"
+#define UDAT_MONTH_DAY "MMMMd"
+#define UDAT_ABBR_MONTH_DAY "MMMd"
+#define UDAT_MONTH_WEEKDAY_DAY "MMMMEEEEd"
+#define UDAT_YEAR_ABBR_MONTH_WEEKDAY_DAY "yMMMEd"
+#define UDAT_YEAR_MONTH_WEEKDAY_DAY "yMMMMEEEEd"
+#define UDAT_YEAR_MONTH_DAY "yMMMMd"
+#define UDAT_YEAR_ABBR_MONTH_DAY "yMMMd"
+#define UDAT_YEAR_NUM_MONTH_DAY "yMd"
+#define UDAT_NUM_MONTH "M"
+#define UDAT_ABBR_MONTH "MMM"
+#define UDAT_MONTH "MMMM"
+#define UDAT_HOUR_MINUTE_GENERIC_TZ "hmv"
+#define UDAT_HOUR_MINUTE_TZ "hmz"
+#define UDAT_HOUR "h"
+#define UDAT_HOUR_GENERIC_TZ "hv"
+#define UDAT_HOUR_TZ "hz"
+
+/** @} */
+
+
+/**
+ * FieldPosition and UFieldPosition selectors for format fields
+ * defined by DateFormat and UDateFormat.
+ * @stable ICU 3.0
+ */
+typedef enum UDateFormatField {
+ /**
+ * FieldPosition and UFieldPosition selector for 'G' field alignment,
+ * corresponding to the UCAL_ERA field.
+ * @stable ICU 3.0
+ */
+ UDAT_ERA_FIELD = 0,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'y' field alignment,
+ * corresponding to the UCAL_YEAR field.
+ * @stable ICU 3.0
+ */
+ UDAT_YEAR_FIELD = 1,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'M' field alignment,
+ * corresponding to the UCAL_MONTH field.
+ * @stable ICU 3.0
+ */
+ UDAT_MONTH_FIELD = 2,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'd' field alignment,
+ * corresponding to the UCAL_DATE field.
+ * @stable ICU 3.0
+ */
+ UDAT_DATE_FIELD = 3,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'k' field alignment,
+ * corresponding to the UCAL_HOUR_OF_DAY field.
+ * UDAT_HOUR_OF_DAY1_FIELD is used for the one-based 24-hour clock.
+ * For example, 23:59 + 01:00 results in 24:59.
+ * @stable ICU 3.0
+ */
+ UDAT_HOUR_OF_DAY1_FIELD = 4,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'H' field alignment,
+ * corresponding to the UCAL_HOUR_OF_DAY field.
+ * UDAT_HOUR_OF_DAY0_FIELD is used for the zero-based 24-hour clock.
+ * For example, 23:59 + 01:00 results in 00:59.
+ * @stable ICU 3.0
+ */
+ UDAT_HOUR_OF_DAY0_FIELD = 5,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'm' field alignment,
+ * corresponding to the UCAL_MINUTE field.
+ * @stable ICU 3.0
+ */
+ UDAT_MINUTE_FIELD = 6,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 's' field alignment,
+ * corresponding to the UCAL_SECOND field.
+ * @stable ICU 3.0
+ */
+ UDAT_SECOND_FIELD = 7,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'S' field alignment,
+ * corresponding to the UCAL_MILLISECOND field.
+ * @stable ICU 3.0
+ */
+ UDAT_FRACTIONAL_SECOND_FIELD = 8,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'E' field alignment,
+ * corresponding to the UCAL_DAY_OF_WEEK field.
+ * @stable ICU 3.0
+ */
+ UDAT_DAY_OF_WEEK_FIELD = 9,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'D' field alignment,
+ * corresponding to the UCAL_DAY_OF_YEAR field.
+ * @stable ICU 3.0
+ */
+ UDAT_DAY_OF_YEAR_FIELD = 10,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'F' field alignment,
+ * corresponding to the UCAL_DAY_OF_WEEK_IN_MONTH field.
+ * @stable ICU 3.0
+ */
+ UDAT_DAY_OF_WEEK_IN_MONTH_FIELD = 11,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'w' field alignment,
+ * corresponding to the UCAL_WEEK_OF_YEAR field.
+ * @stable ICU 3.0
+ */
+ UDAT_WEEK_OF_YEAR_FIELD = 12,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'W' field alignment,
+ * corresponding to the UCAL_WEEK_OF_MONTH field.
+ * @stable ICU 3.0
+ */
+ UDAT_WEEK_OF_MONTH_FIELD = 13,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'a' field alignment,
+ * corresponding to the UCAL_AM_PM field.
+ * @stable ICU 3.0
+ */
+ UDAT_AM_PM_FIELD = 14,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'h' field alignment,
+ * corresponding to the UCAL_HOUR field.
+ * UDAT_HOUR1_FIELD is used for the one-based 12-hour clock.
+ * For example, 11:30 PM + 1 hour results in 12:30 AM.
+ * @stable ICU 3.0
+ */
+ UDAT_HOUR1_FIELD = 15,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'K' field alignment,
+ * corresponding to the UCAL_HOUR field.
+ * UDAT_HOUR0_FIELD is used for the zero-based 12-hour clock.
+ * For example, 11:30 PM + 1 hour results in 00:30 AM.
+ * @stable ICU 3.0
+ */
+ UDAT_HOUR0_FIELD = 16,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'z' field alignment,
+ * corresponding to the UCAL_ZONE_OFFSET and
+ * UCAL_DST_OFFSET fields.
+ * @stable ICU 3.0
+ */
+ UDAT_TIMEZONE_FIELD = 17,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'Y' field alignment,
+ * corresponding to the UCAL_YEAR_WOY field.
+ * @stable ICU 3.0
+ */
+ UDAT_YEAR_WOY_FIELD = 18,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'e' field alignment,
+ * corresponding to the UCAL_DOW_LOCAL field.
+ * @stable ICU 3.0
+ */
+ UDAT_DOW_LOCAL_FIELD = 19,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'u' field alignment,
+ * corresponding to the UCAL_EXTENDED_YEAR field.
+ * @stable ICU 3.0
+ */
+ UDAT_EXTENDED_YEAR_FIELD = 20,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'g' field alignment,
+ * corresponding to the UCAL_JULIAN_DAY field.
+ * @stable ICU 3.0
+ */
+ UDAT_JULIAN_DAY_FIELD = 21,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'A' field alignment,
+ * corresponding to the UCAL_MILLISECONDS_IN_DAY field.
+ * @stable ICU 3.0
+ */
+ UDAT_MILLISECONDS_IN_DAY_FIELD = 22,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'Z' field alignment,
+ * corresponding to the UCAL_ZONE_OFFSET and
+ * UCAL_DST_OFFSET fields.
+ * @stable ICU 3.0
+ */
+ UDAT_TIMEZONE_RFC_FIELD = 23,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'v' field alignment,
+ * corresponding to the UCAL_ZONE_OFFSET field.
+ * @stable ICU 3.4
+ */
+ UDAT_TIMEZONE_GENERIC_FIELD = 24,
+ /**
+ * FieldPosition selector for 'c' field alignment,
+ * corresponding to the {@link #UCAL_DOW_LOCAL} field.
+ * This displays the stand alone day name, if available.
+ * @stable ICU 3.4
+ */
+ UDAT_STANDALONE_DAY_FIELD = 25,
+
+ /**
+ * FieldPosition selector for 'L' field alignment,
+ * corresponding to the {@link #UCAL_MONTH} field.
+ * This displays the stand alone month name, if available.
+ * @stable ICU 3.4
+ */
+ UDAT_STANDALONE_MONTH_FIELD = 26,
+
+ /**
+ * FieldPosition selector for "Q" field alignment,
+ * corresponding to quarters. This is implemented
+ * using the {@link #UCAL_MONTH} field. This
+ * displays the quarter.
+ * @stable ICU 3.6
+ */
+ UDAT_QUARTER_FIELD = 27,
+
+ /**
+ * FieldPosition selector for the "q" field alignment,
+ * corresponding to stand-alone quarters. This is
+ * implemented using the {@link #UCAL_MONTH} field.
+ * This displays the stand-alone quarter.
+ * @stable ICU 3.6
+ */
+ UDAT_STANDALONE_QUARTER_FIELD = 28,
+
+ /**
+ * FieldPosition and UFieldPosition selector for 'V' field alignment,
+ * corresponding to the UCAL_ZONE_OFFSET field.
+ * @stable ICU 3.8
+ */
+ UDAT_TIMEZONE_SPECIAL_FIELD = 29,
+
+ /**
+ * Number of FieldPosition and UFieldPosition selectors for
+ * DateFormat and UDateFormat.
+ * Valid selectors range from 0 to UDAT_FIELD_COUNT-1.
+ * This value is subject to change if new fields are defined
+ * in the future.
+ * @stable ICU 3.0
+ */
+ UDAT_FIELD_COUNT = 30
+
+} UDateFormatField;
+
+
+/**
+ * Maps from a UDateFormatField to the corresponding UCalendarDateFields.
+ * Note: since the mapping is many-to-one, there is no inverse mapping.
+ * @param field the UDateFormatField.
+ * @return the UCalendarDateField. This will be UCAL_FIELD_COUNT in case
+ * of error (e.g., the input field is UDAT_FIELD_COUNT).
+ * @stable ICU 4.4
+ */
+U_STABLE UCalendarDateFields U_EXPORT2
+udat_toCalendarDateField(UDateFormatField field);
+
+
+/**
+ * Open a new UDateFormat for formatting and parsing dates and times.
+ * A UDateFormat may be used to format dates in calls to {@link #udat_format },
+ * and to parse dates in calls to {@link #udat_parse }.
+ * @param timeStyle The style used to format times; one of UDAT_FULL, UDAT_LONG,
+ * UDAT_MEDIUM, UDAT_SHORT, UDAT_DEFAULT, or UDAT_NONE (relative time styles
+ * are not currently supported)
+ * @param dateStyle The style used to format dates; one of UDAT_FULL, UDAT_LONG,
+ * UDAT_MEDIUM, UDAT_SHORT, UDAT_DEFAULT, UDAT_FULL_RELATIVE, UDAT_LONG_RELATIVE,
+ * UDAT_MEDIUM_RELATIVE, UDAT_SHORT_RELATIVE, or UDAT_NONE
+ * @param locale The locale specifying the formatting conventions
+ * @param tzID A timezone ID specifying the timezone to use. If 0, use
+ * the default timezone.
+ * @param tzIDLength The length of tzID, or -1 if null-terminated.
+ * @param pattern A pattern specifying the format to use.
+ * @param patternLength The number of characters in the pattern, or -1 if null-terminated.
+ * @param status A pointer to an UErrorCode to receive any errors
+ * @return A pointer to a UDateFormat to use for formatting dates and times, or 0 if
+ * an error occurred.
+ * @stable ICU 2.0
+ */
+U_STABLE UDateFormat* U_EXPORT2
+udat_open(UDateFormatStyle timeStyle,
+ UDateFormatStyle dateStyle,
+ const char *locale,
+ const UChar *tzID,
+ int32_t tzIDLength,
+ const UChar *pattern,
+ int32_t patternLength,
+ UErrorCode *status);
+
+
+/**
+* Close a UDateFormat.
+* Once closed, a UDateFormat may no longer be used.
+* @param format The formatter to close.
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_close(UDateFormat* format);
+
+#if U_SHOW_CPLUSPLUS_API
+
+U_NAMESPACE_BEGIN
+
+/**
+ * \class LocalUDateFormatPointer
+ * "Smart pointer" class, closes a UDateFormat via udat_close().
+ * For most methods see the LocalPointerBase base class.
+ *
+ * @see LocalPointerBase
+ * @see LocalPointer
+ * @stable ICU 4.4
+ */
+U_DEFINE_LOCAL_OPEN_POINTER(LocalUDateFormatPointer, UDateFormat, udat_close);
+
+U_NAMESPACE_END
+
+#endif
+
+/**
+ * Open a copy of a UDateFormat.
+ * This function performs a deep copy.
+ * @param fmt The format to copy
+ * @param status A pointer to an UErrorCode to receive any errors.
+ * @return A pointer to a UDateFormat identical to fmt.
+ * @stable ICU 2.0
+ */
+U_STABLE UDateFormat* U_EXPORT2
+udat_clone(const UDateFormat *fmt,
+ UErrorCode *status);
+
+/**
+* Format a date using an UDateFormat.
+* The date will be formatted using the conventions specified in {@link #udat_open }
+* @param format The formatter to use
+* @param dateToFormat The date to format
+* @param result A pointer to a buffer to receive the formatted number.
+* @param resultLength The maximum size of result.
+* @param position A pointer to a UFieldPosition. On input, position->field
+* is read. On output, position->beginIndex and position->endIndex indicate
+* the beginning and ending indices of field number position->field, if such
+* a field exists. This parameter may be NULL, in which case no field
+* position data is returned.
+* @param status A pointer to an UErrorCode to receive any errors
+* @return The total buffer size needed; if greater than resultLength, the output was truncated.
+* @see udat_parse
+* @see UFieldPosition
+* @stable ICU 2.0
+*/
+U_STABLE int32_t U_EXPORT2
+udat_format( const UDateFormat* format,
+ UDate dateToFormat,
+ UChar* result,
+ int32_t resultLength,
+ UFieldPosition* position,
+ UErrorCode* status);
+
+/**
+* Parse a string into an date/time using a UDateFormat.
+* The date will be parsed using the conventions specified in {@link #udat_open }
+* @param format The formatter to use.
+* @param text The text to parse.
+* @param textLength The length of text, or -1 if null-terminated.
+* @param parsePos If not 0, on input a pointer to an integer specifying the offset at which
+* to begin parsing. If not 0, on output the offset at which parsing ended.
+* @param status A pointer to an UErrorCode to receive any errors
+* @return The value of the parsed date/time
+* @see udat_format
+* @stable ICU 2.0
+*/
+U_STABLE UDate U_EXPORT2
+udat_parse( const UDateFormat* format,
+ const UChar* text,
+ int32_t textLength,
+ int32_t *parsePos,
+ UErrorCode *status);
+
+/**
+* Parse a string into an date/time using a UDateFormat.
+* The date will be parsed using the conventions specified in {@link #udat_open }
+* @param format The formatter to use.
+* @param calendar The calendar in which to store the parsed data.
+* @param text The text to parse.
+* @param textLength The length of text, or -1 if null-terminated.
+* @param parsePos If not 0, on input a pointer to an integer specifying the offset at which
+* to begin parsing. If not 0, on output the offset at which parsing ended.
+* @param status A pointer to an UErrorCode to receive any errors
+* @see udat_format
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_parseCalendar(const UDateFormat* format,
+ UCalendar* calendar,
+ const UChar* text,
+ int32_t textLength,
+ int32_t *parsePos,
+ UErrorCode *status);
+
+/**
+* Determine if an UDateFormat will perform lenient parsing.
+* With lenient parsing, the parser may use heuristics to interpret inputs that do not
+* precisely match the pattern. With strict parsing, inputs must match the pattern.
+* @param fmt The formatter to query
+* @return TRUE if fmt is set to perform lenient parsing, FALSE otherwise.
+* @see udat_setLenient
+* @stable ICU 2.0
+*/
+U_STABLE UBool U_EXPORT2
+udat_isLenient(const UDateFormat* fmt);
+
+/**
+* Specify whether an UDateFormat will perform lenient parsing.
+* With lenient parsing, the parser may use heuristics to interpret inputs that do not
+* precisely match the pattern. With strict parsing, inputs must match the pattern.
+* @param fmt The formatter to set
+* @param isLenient TRUE if fmt should perform lenient parsing, FALSE otherwise.
+* @see dat_isLenient
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_setLenient( UDateFormat* fmt,
+ UBool isLenient);
+
+/**
+* Get the UCalendar associated with an UDateFormat.
+* A UDateFormat uses a UCalendar to convert a raw value to, for example,
+* the day of the week.
+* @param fmt The formatter to query.
+* @return A pointer to the UCalendar used by fmt.
+* @see udat_setCalendar
+* @stable ICU 2.0
+*/
+U_STABLE const UCalendar* U_EXPORT2
+udat_getCalendar(const UDateFormat* fmt);
+
+/**
+* Set the UCalendar associated with an UDateFormat.
+* A UDateFormat uses a UCalendar to convert a raw value to, for example,
+* the day of the week.
+* @param fmt The formatter to set.
+* @param calendarToSet A pointer to an UCalendar to be used by fmt.
+* @see udat_setCalendar
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_setCalendar( UDateFormat* fmt,
+ const UCalendar* calendarToSet);
+
+/**
+* Get the UNumberFormat associated with an UDateFormat.
+* A UDateFormat uses a UNumberFormat to format numbers within a date,
+* for example the day number.
+* @param fmt The formatter to query.
+* @return A pointer to the UNumberFormat used by fmt to format numbers.
+* @see udat_setNumberFormat
+* @stable ICU 2.0
+*/
+U_STABLE const UNumberFormat* U_EXPORT2
+udat_getNumberFormat(const UDateFormat* fmt);
+
+/**
+* Set the UNumberFormat associated with an UDateFormat.
+* A UDateFormat uses a UNumberFormat to format numbers within a date,
+* for example the day number.
+* @param fmt The formatter to set.
+* @param numberFormatToSet A pointer to the UNumberFormat to be used by fmt to format numbers.
+* @see udat_getNumberFormat
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_setNumberFormat( UDateFormat* fmt,
+ const UNumberFormat* numberFormatToSet);
+
+/**
+* Get a locale for which date/time formatting patterns are available.
+* A UDateFormat in a locale returned by this function will perform the correct
+* formatting and parsing for the locale.
+* @param localeIndex The index of the desired locale.
+* @return A locale for which date/time formatting patterns are available, or 0 if none.
+* @see udat_countAvailable
+* @stable ICU 2.0
+*/
+U_STABLE const char* U_EXPORT2
+udat_getAvailable(int32_t localeIndex);
+
+/**
+* Determine how many locales have date/time formatting patterns available.
+* This function is most useful as determining the loop ending condition for
+* calls to {@link #udat_getAvailable }.
+* @return The number of locales for which date/time formatting patterns are available.
+* @see udat_getAvailable
+* @stable ICU 2.0
+*/
+U_STABLE int32_t U_EXPORT2
+udat_countAvailable(void);
+
+/**
+* Get the year relative to which all 2-digit years are interpreted.
+* For example, if the 2-digit start year is 2100, the year 99 will be
+* interpreted as 2199.
+* @param fmt The formatter to query.
+* @param status A pointer to an UErrorCode to receive any errors
+* @return The year relative to which all 2-digit years are interpreted.
+* @see udat_Set2DigitYearStart
+* @stable ICU 2.0
+*/
+U_STABLE UDate U_EXPORT2
+udat_get2DigitYearStart( const UDateFormat *fmt,
+ UErrorCode *status);
+
+/**
+* Set the year relative to which all 2-digit years will be interpreted.
+* For example, if the 2-digit start year is 2100, the year 99 will be
+* interpreted as 2199.
+* @param fmt The formatter to set.
+* @param d The year relative to which all 2-digit years will be interpreted.
+* @param status A pointer to an UErrorCode to receive any errors
+* @see udat_Set2DigitYearStart
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_set2DigitYearStart( UDateFormat *fmt,
+ UDate d,
+ UErrorCode *status);
+
+/**
+* Extract the pattern from a UDateFormat.
+* The pattern will follow the pattern syntax rules.
+* @param fmt The formatter to query.
+* @param localized TRUE if the pattern should be localized, FALSE otherwise.
+* @param result A pointer to a buffer to receive the pattern.
+* @param resultLength The maximum size of result.
+* @param status A pointer to an UErrorCode to receive any errors
+* @return The total buffer size needed; if greater than resultLength, the output was truncated.
+* @see udat_applyPattern
+* @stable ICU 2.0
+*/
+U_STABLE int32_t U_EXPORT2
+udat_toPattern( const UDateFormat *fmt,
+ UBool localized,
+ UChar *result,
+ int32_t resultLength,
+ UErrorCode *status);
+
+/**
+* Set the pattern used by an UDateFormat.
+* The pattern should follow the pattern syntax rules.
+* @param format The formatter to set.
+* @param localized TRUE if the pattern is localized, FALSE otherwise.
+* @param pattern The new pattern
+* @param patternLength The length of pattern, or -1 if null-terminated.
+* @see udat_toPattern
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_applyPattern( UDateFormat *format,
+ UBool localized,
+ const UChar *pattern,
+ int32_t patternLength);
+
+/**
+ * The possible types of date format symbols
+ * @stable ICU 2.6
+ */
+typedef enum UDateFormatSymbolType {
+ /** The era names, for example AD */
+ UDAT_ERAS,
+ /** The month names, for example February */
+ UDAT_MONTHS,
+ /** The short month names, for example Feb. */
+ UDAT_SHORT_MONTHS,
+ /** The weekday names, for example Monday */
+ UDAT_WEEKDAYS,
+ /** The short weekday names, for example Mon. */
+ UDAT_SHORT_WEEKDAYS,
+ /** The AM/PM names, for example AM */
+ UDAT_AM_PMS,
+ /** The localized characters */
+ UDAT_LOCALIZED_CHARS,
+ /** The long era names, for example Anno Domini */
+ UDAT_ERA_NAMES,
+ /** The narrow month names, for example F */
+ UDAT_NARROW_MONTHS,
+ /** The narrow weekday names, for example N */
+ UDAT_NARROW_WEEKDAYS,
+ /** Standalone context versions of months */
+ UDAT_STANDALONE_MONTHS,
+ UDAT_STANDALONE_SHORT_MONTHS,
+ UDAT_STANDALONE_NARROW_MONTHS,
+ /** Standalone context versions of weekdays */
+ UDAT_STANDALONE_WEEKDAYS,
+ UDAT_STANDALONE_SHORT_WEEKDAYS,
+ UDAT_STANDALONE_NARROW_WEEKDAYS,
+ /** The quarters, for example 1st Quarter */
+ UDAT_QUARTERS,
+ /** The short quarter names, for example Q1 */
+ UDAT_SHORT_QUARTERS,
+ /** Standalone context versions of quarters */
+ UDAT_STANDALONE_QUARTERS,
+ UDAT_STANDALONE_SHORT_QUARTERS
+
+} UDateFormatSymbolType;
+
+struct UDateFormatSymbols;
+/** Date format symbols.
+ * For usage in C programs.
+ * @stable ICU 2.6
+ */
+typedef struct UDateFormatSymbols UDateFormatSymbols;
+
+/**
+* Get the symbols associated with an UDateFormat.
+* The symbols are what a UDateFormat uses to represent locale-specific data,
+* for example month or day names.
+* @param fmt The formatter to query.
+* @param type The type of symbols to get. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS,
+* UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS
+* @param symbolIndex The desired symbol of type type.
+* @param result A pointer to a buffer to receive the pattern.
+* @param resultLength The maximum size of result.
+* @param status A pointer to an UErrorCode to receive any errors
+* @return The total buffer size needed; if greater than resultLength, the output was truncated.
+* @see udat_countSymbols
+* @see udat_setSymbols
+* @stable ICU 2.0
+*/
+U_STABLE int32_t U_EXPORT2
+udat_getSymbols(const UDateFormat *fmt,
+ UDateFormatSymbolType type,
+ int32_t symbolIndex,
+ UChar *result,
+ int32_t resultLength,
+ UErrorCode *status);
+
+/**
+* Count the number of particular symbols for an UDateFormat.
+* This function is most useful as for detemining the loop termination condition
+* for calls to {@link #udat_getSymbols }.
+* @param fmt The formatter to query.
+* @param type The type of symbols to count. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS,
+* UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS
+* @return The number of symbols of type type.
+* @see udat_getSymbols
+* @see udat_setSymbols
+* @stable ICU 2.0
+*/
+U_STABLE int32_t U_EXPORT2
+udat_countSymbols( const UDateFormat *fmt,
+ UDateFormatSymbolType type);
+
+/**
+* Set the symbols associated with an UDateFormat.
+* The symbols are what a UDateFormat uses to represent locale-specific data,
+* for example month or day names.
+* @param format The formatter to set
+* @param type The type of symbols to set. One of UDAT_ERAS, UDAT_MONTHS, UDAT_SHORT_MONTHS,
+* UDAT_WEEKDAYS, UDAT_SHORT_WEEKDAYS, UDAT_AM_PMS, or UDAT_LOCALIZED_CHARS
+* @param symbolIndex The index of the symbol to set of type type.
+* @param value The new value
+* @param valueLength The length of value, or -1 if null-terminated
+* @param status A pointer to an UErrorCode to receive any errors
+* @see udat_getSymbols
+* @see udat_countSymbols
+* @stable ICU 2.0
+*/
+U_STABLE void U_EXPORT2
+udat_setSymbols( UDateFormat *format,
+ UDateFormatSymbolType type,
+ int32_t symbolIndex,
+ UChar *value,
+ int32_t valueLength,
+ UErrorCode *status);
+
+/**
+ * Get the locale for this date format object.
+ * You can choose between valid and actual locale.
+ * @param fmt The formatter to get the locale from
+ * @param type type of the locale we're looking for (valid or actual)
+ * @param status error code for the operation
+ * @return the locale name
+ * @stable ICU 2.8
+ */
+U_STABLE const char* U_EXPORT2
+udat_getLocaleByType(const UDateFormat *fmt,
+ ULocDataLocaleType type,
+ UErrorCode* status);
+
+/**
+* Extract the date pattern from a UDateFormat set for relative date formatting.
+* The pattern will follow the pattern syntax rules.
+* @param fmt The formatter to query.
+* @param result A pointer to a buffer to receive the pattern.
+* @param resultLength The maximum size of result.
+* @param status A pointer to a UErrorCode to receive any errors
+* @return The total buffer size needed; if greater than resultLength, the output was truncated.
+* @see udat_applyPatternRelative
+* @internal ICU 4.2 technology preview
+*/
+U_INTERNAL int32_t U_EXPORT2
+udat_toPatternRelativeDate(const UDateFormat *fmt,
+ UChar *result,
+ int32_t resultLength,
+ UErrorCode *status);
+
+/**
+* Extract the time pattern from a UDateFormat set for relative date formatting.
+* The pattern will follow the pattern syntax rules.
+* @param fmt The formatter to query.
+* @param result A pointer to a buffer to receive the pattern.
+* @param resultLength The maximum size of result.
+* @param status A pointer to a UErrorCode to receive any errors
+* @return The total buffer size needed; if greater than resultLength, the output was truncated.
+* @see udat_applyPatternRelative
+* @internal ICU 4.2 technology preview
+*/
+U_INTERNAL int32_t U_EXPORT2
+udat_toPatternRelativeTime(const UDateFormat *fmt,
+ UChar *result,
+ int32_t resultLength,
+ UErrorCode *status);
+
+/**
+* Set the date & time patterns used by a UDateFormat set for relative date formatting.
+* The patterns should follow the pattern syntax rules.
+* @param format The formatter to set.
+* @param datePattern The new date pattern
+* @param datePatternLength The length of datePattern, or -1 if null-terminated.
+* @param timePattern The new time pattern
+* @param timePatternLength The length of timePattern, or -1 if null-terminated.
+* @param status A pointer to a UErrorCode to receive any errors
+* @see udat_toPatternRelativeDate, udat_toPatternRelativeTime
+* @internal ICU 4.2 technology preview
+*/
+U_INTERNAL void U_EXPORT2
+udat_applyPatternRelative(UDateFormat *format,
+ const UChar *datePattern,
+ int32_t datePatternLength,
+ const UChar *timePattern,
+ int32_t timePatternLength,
+ UErrorCode *status);
+
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif