464 lines
18 KiB
C
464 lines
18 KiB
C
/*
|
|
*******************************************************************************
|
|
* *
|
|
* COPYRIGHT: *
|
|
* (C) Copyright Taligent, Inc., 1996 *
|
|
* (C) Copyright International Business Machines Corporation, 1998-1999 *
|
|
* Licensed Material - Program-Property of IBM - All Rights Reserved. *
|
|
* US Government Users Restricted Rights - Use, duplication, or disclosure *
|
|
* restricted by GSA ADP Schedule Contract with IBM Corp. *
|
|
* *
|
|
*******************************************************************************
|
|
*/
|
|
|
|
#ifndef UDAT_H
|
|
#define UDAT_H
|
|
|
|
#include "utypes.h"
|
|
#include "ucal.h"
|
|
#include "unum.h"
|
|
/**
|
|
* @name Date Format C API
|
|
*
|
|
* 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>
|
|
* . UErrorCode status;
|
|
* . UFieldPosition pos;
|
|
* . UChar *myString;
|
|
* . t_int32 myStrlen=0;
|
|
* . UDateFormat* dfmt = udat_open(UCAL_DEFAULT, UCAL_DEFAULT, NULL, "PST", &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);
|
|
* . }
|
|
* </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>
|
|
* . t_int32 i, myStrlen=0;
|
|
* . UChar* myString;
|
|
* . UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values
|
|
* . UDateFormat* df = udat_open(UCAL_DEFAULT, UCAL_DEFAULT, NULL, "GMT", &status);
|
|
* . for (i = 0; i < 3; ++i) {
|
|
* . myStrlen = udat_format(df, myDate, NULL, myStrlen, &pos, &status);
|
|
* . if(status==U_BUFFER_OVERFLOW_ERROR){
|
|
* . status=U_ZERO_ERROR;
|
|
* . myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
|
|
* . udat_format(df, myDate, myString, myStrlen+1, &pos, &status);
|
|
* . }
|
|
* . printf("%s \n", austrdup(myString) ); //austrdup( a function used to convert UChar* to char*)
|
|
* . free(myString);
|
|
* . }
|
|
* </pre>
|
|
* To format a date for a different Locale, specify it in the call to
|
|
* udat_open()
|
|
* <pre>
|
|
* . UDateFormat* df = udat_open(UDAT_SHORT, UDAT_SHORT, "fr_FR", "GMT", &status);
|
|
* </pre>
|
|
* You can use a DateFormat API udat_parse() to parse.
|
|
* <pre>
|
|
* . UErrorCode status = U_ZERO_ERROR;
|
|
* . t_int32 parsepos=0;
|
|
* . UDate myDate = udat_parse(df, myString, u_strlen(myString), &parsepos, &status);
|
|
* </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.
|
|
*/
|
|
typedef void* UDateFormat;
|
|
|
|
/** The possible date/time format styles */
|
|
enum UDateFormatStyle {
|
|
/** Full style */
|
|
UDAT_FULL,
|
|
/** Long style */
|
|
UDAT_LONG,
|
|
/** Medium style */
|
|
UDAT_MEDIUM,
|
|
/** Short style */
|
|
UDAT_SHORT,
|
|
/** Default style */
|
|
UDAT_DEFAULT = UDAT_MEDIUM,
|
|
/** No style */
|
|
UDAT_NONE = -1
|
|
};
|
|
typedef enum UDateFormatStyle UDateFormatStyle;
|
|
|
|
/**
|
|
* Open a new UDateFormat for formatting and parsing dates and times.
|
|
* A UDateFormat may be used to format dates in calls to \Ref{udat_format},
|
|
* and to parse dates in calls to \Ref{udat_parse}.
|
|
* @param timeStyle The style used to format times; one of UDAT_FULL_STYLE, UDAT_LONG_STYLE,
|
|
* UDAT_MEDIUM_STYLE, UDAT_SHORT_STYLE, or UDAT_DEFAULT_STYLE
|
|
* @param dateStyle The style used to format dates; one of UDAT_FULL_STYLE, UDAT_LONG_STYLE,
|
|
* UDAT_MEDIUM_STYLE, UDAT_SHORT_STYLE, or UDAT_DEFAULT_STYLE
|
|
* @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 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.
|
|
* @see udat_openPattern
|
|
*/
|
|
U_CAPI UDateFormat*
|
|
udat_open(UDateFormatStyle timeStyle,
|
|
UDateFormatStyle dateStyle,
|
|
const char *locale,
|
|
const UChar *tzID,
|
|
int32_t tzIDLength,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Open a new UDateFormat for formatting dates and times.
|
|
* A UDateFormat may be used to format dates in calls to \Ref{udat_format},
|
|
* and to parse dates in calls to \Ref{udat_parse}.
|
|
* @param pattern A pattern specifying the format to use.
|
|
* @param patternLength The number of characters in the pattern, or -1 if null-terminated.
|
|
* @param locale The locale specifying the formatting conventions
|
|
* @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.
|
|
* @see udat_open
|
|
*/
|
|
U_CAPI UDateFormat*
|
|
udat_openPattern( const UChar *pattern,
|
|
int32_t patternLength,
|
|
const char *locale,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Close a UDateFormat.
|
|
* Once closed, a UDateFormat may no longer be used.
|
|
* @param fmt The formatter to close.
|
|
*/
|
|
U_CAPI void
|
|
udat_close(UDateFormat* format);
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
U_CAPI UDateFormat*
|
|
udat_clone(const UDateFormat *fmt,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Format a date using an UDateFormat.
|
|
* The date will be formatted using the conventions specified in \Ref{udat_open}
|
|
* or \Ref{udat_openPattern}
|
|
* @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 pos If not 0, a UFieldPosition which will receive the information on a specific field.
|
|
* @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
|
|
*/
|
|
U_CAPI int32_t
|
|
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 \Ref{udat_open}
|
|
* or \Ref{udat_openPattern}
|
|
* @param fmt 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
|
|
*/
|
|
U_CAPI UDate
|
|
udat_parse( const UDateFormat* format,
|
|
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
|
|
*/
|
|
U_CAPI bool_t
|
|
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
|
|
*/
|
|
U_CAPI void
|
|
udat_setLenient( UDateFormat* fmt,
|
|
bool_t 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
|
|
*/
|
|
U_CAPI const UCalendar*
|
|
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
|
|
*/
|
|
U_CAPI void
|
|
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
|
|
*/
|
|
U_CAPI const UNumberFormat*
|
|
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
|
|
*/
|
|
U_CAPI void
|
|
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 index The index of the desired locale.
|
|
* @return A locale for which date/time formatting patterns are available, or 0 if none.
|
|
* @see udat_countAvailable
|
|
*/
|
|
U_CAPI const char*
|
|
udat_getAvailable(int32_t index);
|
|
|
|
/**
|
|
* Determine how many locales have date/time formatting patterns available.
|
|
* This function is most useful as determining the loop ending condition for
|
|
* calls to \Ref{udat_getAvailable}.
|
|
* @return The number of locales for which date/time formatting patterns are available.
|
|
* @see udat_getAvailable
|
|
*/
|
|
U_CAPI int32_t
|
|
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
|
|
*/
|
|
U_CAPI UDate
|
|
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
|
|
*/
|
|
U_CAPI void
|
|
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
|
|
*/
|
|
U_CAPI int32_t
|
|
udat_toPattern( const UDateFormat *fmt,
|
|
bool_t localized,
|
|
UChar *result,
|
|
int32_t resultLength,
|
|
UErrorCode *status);
|
|
|
|
/**
|
|
* Set the pattern used by an UDateFormat.
|
|
* The pattern should follow the pattern syntax rules.
|
|
* @param fmt 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
|
|
*/
|
|
U_CAPI void
|
|
udat_applyPattern( UDateFormat *format,
|
|
bool_t localized,
|
|
const UChar *pattern,
|
|
int32_t patternLength);
|
|
|
|
/** The possible types of date format symbols */
|
|
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
|
|
};
|
|
typedef enum UDateFormatSymbolType UDateFormatSymbolType;
|
|
|
|
/** Date format symbols.
|
|
* For usage in C programs.
|
|
*/
|
|
struct UDateFormatSymbols;
|
|
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 index 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
|
|
*/
|
|
U_CAPI int32_t
|
|
udat_getSymbols(const UDateFormat *fmt,
|
|
UDateFormatSymbolType type,
|
|
int32_t index,
|
|
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 \Ref{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
|
|
*/
|
|
U_CAPI int32_t
|
|
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 fmt 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 index 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
|
|
* @return A pointer to result.
|
|
* @see udat_getSymbols
|
|
* @see udat_countSymbols
|
|
*/
|
|
U_CAPI void
|
|
udat_setSymbols( UDateFormat *format,
|
|
UDateFormatSymbolType type,
|
|
int32_t index,
|
|
UChar *value,
|
|
int32_t valueLength,
|
|
UErrorCode *status);
|
|
|
|
#endif
|