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Edit File : format.h \| Size : 12.50 KB
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************** * Copyright (C) 1997-2011, International Business Machines Corporation and others. * All Rights Reserved. ******************************************************************************** * * File FORMAT.H * * Modification History: * * Date Name Description * 02/19/97 aliu Converted from java. * 03/17/97 clhuang Updated per C++ implementation. * 03/27/97 helena Updated to pass the simple test after code review. ******************************************************************************** / // ************************************************************************** // This file was generated from the java source file Format.java // ************************************************************************* #ifndef FORMAT_H #define FORMAT_H #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API / * \file * \brief C++ API: Base class for all formats. / #if !UCONFIG_NO_FORMATTING #include "unicode/unistr.h" #include "unicode/fmtable.h" #include "unicode/fieldpos.h" #include "unicode/fpositer.h" #include "unicode/parsepos.h" #include "unicode/parseerr.h" #include "unicode/locid.h" U_NAMESPACE_BEGIN /* * Base class for all formats. This is an abstract base class which * specifies the protocol for classes which convert other objects or * values, such as numeric values and dates, and their string * representations. In some cases these representations may be * localized or contain localized characters or strings. For example, * a numeric formatter such as DecimalFormat may convert a numeric * value such as 12345 to the string "$12,345". It may also parse * the string back into a numeric value. A date and time formatter * like SimpleDateFormat may represent a specific date, encoded * numerically, as a string such as "Wednesday, February 26, 1997 AD". * <P> * Many of the concrete subclasses of Format employ the notion of * a pattern. A pattern is a string representation of the rules which * govern the interconversion between values and strings. For example, * a DecimalFormat object may be associated with the pattern * "$#,##0.00;($#,##0.00)", which is a common US English format for * currency values, yielding strings such as "$1,234.45" for 1234.45, * and "($987.65)" for 987.6543. The specific syntax of a pattern * is defined by each subclass. * <P> * Even though many subclasses use patterns, the notion of a pattern * is not inherent to Format classes in general, and is not part of * the explicit base class protocol. * <P> * Two complex formatting classes bear mentioning. These are * MessageFormat and ChoiceFormat. ChoiceFormat is a subclass of * NumberFormat which allows the user to format different number ranges * as strings. For instance, 0 may be represented as "no files", 1 as * "one file", and any number greater than 1 as "many files". * MessageFormat is a formatter which utilizes other Format objects to * format a string containing with multiple values. For instance, * A MessageFormat object might produce the string "There are no files * on the disk MyDisk on February 27, 1997." given the arguments 0, * "MyDisk", and the date value of 2/27/97. See the ChoiceFormat * and MessageFormat headers for further information. * <P> * If formatting is unsuccessful, a failing UErrorCode is returned when * the Format cannot format the type of object, otherwise if there is * something illformed about the the Unicode replacement character * 0xFFFD is returned. * <P> * If there is no match when parsing, a parse failure UErrorCode is * retured for methods which take no ParsePosition. For the method * that takes a ParsePosition, the index parameter is left unchanged. * <P> * <em>User subclasses are not supported.</em> While clients may write * subclasses, such code will not necessarily work and will not be * guaranteed to work stably from release to release. / class U_I18N_API Format : public UObject { public: /* Destructor * @stable ICU 2.4 / virtual ~Format(); /* * Return true if the given Format objects are semantically equal. * Objects of different subclasses are considered unequal. * @param other the object to be compared with. * @return Return true if the given Format objects are semantically equal. * Objects of different subclasses are considered unequal. * @stable ICU 2.0 / virtual UBool operator==(const Format& other) const = 0; /* * Return true if the given Format objects are not semantically * equal. * @param other the object to be compared with. * @return Return true if the given Format objects are not semantically. * @stable ICU 2.0 / UBool operator!=(const Format& other) const { return !operator==(other); } /* * Clone this object polymorphically. The caller is responsible * for deleting the result when done. * @return A copy of the object * @stable ICU 2.0 / virtual Format clone() const = 0; /** * Formats an object to produce a string. * * @param obj The object to format. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param status Output parameter filled in with success or failure status. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 / UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, UErrorCode& status) const; /* * Format an object to produce a string. This is a pure virtual method which * subclasses must implement. This method allows polymorphic formatting * of Formattable objects. If a subclass of Format receives a Formattable * object type it doesn't handle (e.g., if a numeric Formattable is passed * to a DateFormat object) then it returns a failing UErrorCode. * * @param obj The object to format. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param pos On input: an alignment field, if desired. * On output: the offsets of the alignment field. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable ICU 2.0 / virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, FieldPosition& pos, UErrorCode& status) const = 0; /* * Format an object to produce a string. Subclasses should override this * method. This method allows polymorphic formatting of Formattable objects. * If a subclass of Format receives a Formattable object type it doesn't * handle (e.g., if a numeric Formattable is passed to a DateFormat object) * then it returns a failing UErrorCode. * * @param obj The object to format. * @param appendTo Output parameter to receive result. * Result is appended to existing contents. * @param posIter On return, can be used to iterate over positions * of fields generated by this format call. * @param status Output param filled with success/failure status. * @return Reference to 'appendTo' parameter. * @stable ICU 4.4 / virtual UnicodeString& format(const Formattable& obj, UnicodeString& appendTo, FieldPositionIterator posIter, UErrorCode& status) const; /** * Parse a string to produce an object. This is a pure virtual * method which subclasses must implement. This method allows * polymorphic parsing of strings into Formattable objects. * <P> * Before calling, set parse_pos.index to the offset you want to * start parsing at in the source. After calling, parse_pos.index * is the end of the text you parsed. If error occurs, index is * unchanged. * <P> * When parsing, leading whitespace is discarded (with successful * parse), while trailing whitespace is left as is. * <P> * Example: * <P> * Parsing "_12_xy" (where _ represents a space) for a number, * with index == 0 will result in the number 12, with * parse_pos.index updated to 3 (just before the second space). * Parsing a second time will result in a failing UErrorCode since * "xy" is not a number, and leave index at 3. * <P> * Subclasses will typically supply specific parse methods that * return different types of values. Since methods can't overload * on return types, these will typically be named "parse", while * this polymorphic method will always be called parseObject. Any * parse method that does not take a parse_pos should set status * to an error value when no text in the required format is at the * start position. * * @param source The string to be parsed into an object. * @param result Formattable to be set to the parse result. * If parse fails, return contents are undefined. * @param parse_pos The position to start parsing at. Upon return * this param is set to the position after the * last character successfully parsed. If the * source is not parsed successfully, this param * will remain unchanged. * @stable ICU 2.0 / virtual void parseObject(const UnicodeString& source, Formattable& result, ParsePosition& parse_pos) const = 0; /* * Parses a string to produce an object. This is a convenience method * which calls the pure virtual parseObject() method, and returns a * failure UErrorCode if the ParsePosition indicates failure. * * @param source The string to be parsed into an object. * @param result Formattable to be set to the parse result. * If parse fails, return contents are undefined. * @param status Output param to be filled with success/failure * result code. * @stable ICU 2.0 / void parseObject(const UnicodeString& source, Formattable& result, UErrorCode& status) const; /* Get the locale for this format object. You can choose between valid and actual locale. * @param type type of the locale we're looking for (valid or actual) * @param status error code for the operation * @return the locale * @stable ICU 2.8 / Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const; #ifndef U_HIDE_INTERNAL_API /* Get the locale for this format object. You can choose between valid and actual locale. * @param type type of the locale we're looking for (valid or actual) * @param status error code for the operation * @return the locale * @internal / const char getLocaleID(ULocDataLocaleType type, UErrorCode &status) const; #endif /* U_HIDE_INTERNAL_API / protected: /* @stable ICU 2.8 / void setLocaleIDs(const char valid, const char* actual); protected: /** * Default constructor for subclass use only. Does nothing. * @stable ICU 2.0 / Format(); /* * @stable ICU 2.0 / Format(const Format&); // Does nothing; for subclasses only /* * @stable ICU 2.0 / Format& operator=(const Format&); // Does nothing; for subclasses /* * Simple function for initializing a UParseError from a UnicodeString. * * @param pattern The pattern to copy into the parseError * @param pos The position in pattern where the error occured * @param parseError The UParseError object to fill in * @stable ICU 2.4 / static void syntaxError(const UnicodeString& pattern, int32_t pos, UParseError& parseError); private: char actualLocale[ULOC_FULLNAME_CAPACITY]; char validLocale[ULOC_FULLNAME_CAPACITY]; }; U_NAMESPACE_END #endif / #if !UCONFIG_NO_FORMATTING / #endif / U_SHOW_CPLUSPLUS_API */ #endif // _FORMAT //eof Back

Edit File : format.h | Size : 12.50 KB

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
********************************************************************************
* Copyright (C) 1997-2011, International Business Machines Corporation and others.
* All Rights Reserved.
********************************************************************************
*
* File FORMAT.H
*
* Modification History:
*
*   Date        Name        Description
*   02/19/97    aliu        Converted from java.
*   03/17/97    clhuang     Updated per C++ implementation.
*   03/27/97    helena      Updated to pass the simple test after code review.
********************************************************************************
*/
// *****************************************************************************
// This file was generated from the java source file Format.java
// *****************************************************************************

#ifndef FORMAT_H
#define FORMAT_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

/**
 * \file 
 * \brief C++ API: Base class for all formats. 
 */

#if !UCONFIG_NO_FORMATTING

#include "unicode/unistr.h"
#include "unicode/fmtable.h"
#include "unicode/fieldpos.h"
#include "unicode/fpositer.h"
#include "unicode/parsepos.h"
#include "unicode/parseerr.h" 
#include "unicode/locid.h"

U_NAMESPACE_BEGIN

/**
 * Base class for all formats. This is an abstract base class which
 * specifies the protocol for classes which convert other objects or
 * values, such as numeric values and dates, and their string
 * representations. In some cases these representations may be
 * localized or contain localized characters or strings. For example,
 * a numeric formatter such as DecimalFormat may convert a numeric
 * value such as 12345 to the string "$12,345". It may also parse
 * the string back into a numeric value. A date and time formatter
 * like SimpleDateFormat may represent a specific date, encoded
 * numerically, as a string such as "Wednesday, February 26, 1997 AD".
 * 
 * Many of the concrete subclasses of Format employ the notion of
 * a pattern. A pattern is a string representation of the rules which
 * govern the interconversion between values and strings. For example,
 * a DecimalFormat object may be associated with the pattern
 * "$#,##0.00;($#,##0.00)", which is a common US English format for
 * currency values, yielding strings such as "$1,234.45" for 1234.45,
 * and "($987.65)" for 987.6543. The specific syntax of a pattern
 * is defined by each subclass.
 * 
 * Even though many subclasses use patterns, the notion of a pattern
 * is not inherent to Format classes in general, and is not part of
 * the explicit base class protocol.
 * 
 * Two complex formatting classes bear mentioning. These are
 * MessageFormat and ChoiceFormat. ChoiceFormat is a subclass of
 * NumberFormat which allows the user to format different number ranges
 * as strings. For instance, 0 may be represented as "no files", 1 as
 * "one file", and any number greater than 1 as "many files".
 * MessageFormat is a formatter which utilizes other Format objects to
 * format a string containing with multiple values. For instance,
 * A MessageFormat object might produce the string "There are no files
 * on the disk MyDisk on February 27, 1997." given the arguments 0,
 * "MyDisk", and the date value of 2/27/97. See the ChoiceFormat
 * and MessageFormat headers for further information.
 * 
 * If formatting is unsuccessful, a failing UErrorCode is returned when
 * the Format cannot format the type of object, otherwise if there is
 * something illformed about the the Unicode replacement character
 * 0xFFFD is returned.
 * 
 * If there is no match when parsing, a parse failure UErrorCode is
 * retured for methods which take no ParsePosition. For the method
 * that takes a ParsePosition, the index parameter is left unchanged.
 * 
 * User subclasses are not supported. While clients may write
 * subclasses, such code will not necessarily work and will not be
 * guaranteed to work stably from release to release.
 */
class U_I18N_API Format : public UObject {
public:

/** Destructor
     * @stable ICU 2.4
     */
    virtual ~Format();

/**
     * Return true if the given Format objects are semantically equal.
     * Objects of different subclasses are considered unequal.
     * @param other    the object to be compared with.
     * @return         Return true if the given Format objects are semantically equal.
     *                 Objects of different subclasses are considered unequal.
     * @stable ICU 2.0
     */
    virtual UBool operator==(const Format& other) const = 0;

/**
     * Return true if the given Format objects are not semantically
     * equal.
     * @param other    the object to be compared with.
     * @return         Return true if the given Format objects are not semantically.
     * @stable ICU 2.0
     */
    UBool operator!=(const Format& other) const { return !operator==(other); }

/**
     * Clone this object polymorphically.  The caller is responsible
     * for deleting the result when done.
     * @return    A copy of the object
     * @stable ICU 2.0
     */
    virtual Format* clone() const = 0;

/**
     * Formats an object to produce a string.
     *
     * @param obj       The object to format.
     * @param appendTo  Output parameter to receive result.
     *                  Result is appended to existing contents.
     * @param status    Output parameter filled in with success or failure status.
     * @return          Reference to 'appendTo' parameter.
     * @stable ICU 2.0
     */
    UnicodeString& format(const Formattable& obj,
                          UnicodeString& appendTo,
                          UErrorCode& status) const;

/**
     * Format an object to produce a string.  This is a pure virtual method which
     * subclasses must implement. This method allows polymorphic formatting
     * of Formattable objects. If a subclass of Format receives a Formattable
     * object type it doesn't handle (e.g., if a numeric Formattable is passed
     * to a DateFormat object) then it returns a failing UErrorCode.
     *
     * @param obj       The object to format.
     * @param appendTo  Output parameter to receive result.
     *                  Result is appended to existing contents.
     * @param pos       On input: an alignment field, if desired.
     *                  On output: the offsets of the alignment field.
     * @param status    Output param filled with success/failure status.
     * @return          Reference to 'appendTo' parameter.
     * @stable ICU 2.0
     */
    virtual UnicodeString& format(const Formattable& obj,
                                  UnicodeString& appendTo,
                                  FieldPosition& pos,
                                  UErrorCode& status) const = 0;
    /**
     * Format an object to produce a string.  Subclasses should override this
     * method. This method allows polymorphic formatting of Formattable objects.
     * If a subclass of Format receives a Formattable object type it doesn't
     * handle (e.g., if a numeric Formattable is passed to a DateFormat object)
     * then it returns a failing UErrorCode.
     *
     * @param obj       The object to format.
     * @param appendTo  Output parameter to receive result.
     *                  Result is appended to existing contents.
     * @param posIter   On return, can be used to iterate over positions
     *                  of fields generated by this format call.
     * @param status    Output param filled with success/failure status.
     * @return          Reference to 'appendTo' parameter.
     * @stable ICU 4.4
     */
    virtual UnicodeString& format(const Formattable& obj,
                                  UnicodeString& appendTo,
                                  FieldPositionIterator* posIter,
                                  UErrorCode& status) const;

/**
 * Parse a string to produce an object. This is a pure virtual
 * method which subclasses must implement. This method allows
 * polymorphic parsing of strings into Formattable objects.
 * 
 * Before calling, set parse_pos.index to the offset you want to
 * start parsing at in the source. After calling, parse_pos.index
 * is the end of the text you parsed. If error occurs, index is
 * unchanged.
 * 
 * When parsing, leading whitespace is discarded (with successful
 * parse), while trailing whitespace is left as is.
 * 
 * Example:
 * 
 * Parsing "_12_xy" (where _ represents a space) for a number,
 * with index == 0 will result in the number 12, with
 * parse_pos.index updated to 3 (just before the second space).
 * Parsing a second time will result in a failing UErrorCode since
 * "xy" is not a number, and leave index at 3.
 * 
 * Subclasses will typically supply specific parse methods that
 * return different types of values. Since methods can't overload
 * on return types, these will typically be named "parse", while
 * this polymorphic method will always be called parseObject. Any
 * parse method that does not take a parse_pos should set status
 * to an error value when no text in the required format is at the
 * start position.
 *
 * @param source The string to be parsed into an object.
 * @param result Formattable to be set to the parse result.
 * If parse fails, return contents are undefined.
 * @param parse_pos The position to start parsing at. Upon return
 * this param is set to the position after the
 * last character successfully parsed. If the
 * source is not parsed successfully, this param
 * will remain unchanged.
 * @stable ICU 2.0
 */
 virtual void parseObject(const UnicodeString& source,
 Formattable& result,
 ParsePosition& parse_pos) const = 0;

/**
     * Parses a string to produce an object. This is a convenience method
     * which calls the pure virtual parseObject() method, and returns a
     * failure UErrorCode if the ParsePosition indicates failure.
     *
     * @param source    The string to be parsed into an object.
     * @param result    Formattable to be set to the parse result.
     *                  If parse fails, return contents are undefined.
     * @param status    Output param to be filled with success/failure
     *                  result code.
     * @stable ICU 2.0
     */
    void parseObject(const UnicodeString& source,
                     Formattable& result,
                     UErrorCode& status) const;

/** Get the locale for this format object. You can choose between valid and actual locale.
     *  @param type type of the locale we're looking for (valid or actual) 
     *  @param status error code for the operation
     *  @return the locale
     *  @stable ICU 2.8
     */
    Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const;

#ifndef U_HIDE_INTERNAL_API
    /** Get the locale for this format object. You can choose between valid and actual locale.
     *  @param type type of the locale we're looking for (valid or actual) 
     *  @param status error code for the operation
     *  @return the locale
     *  @internal
     */
    const char* getLocaleID(ULocDataLocaleType type, UErrorCode &status) const;
#endif  /* U_HIDE_INTERNAL_API */

protected:
    /** @stable ICU 2.8 */
    void setLocaleIDs(const char* valid, const char* actual);

protected:
    /**
     * Default constructor for subclass use only.  Does nothing.
     * @stable ICU 2.0
     */
    Format();

/**
     * @stable ICU 2.0
     */
    Format(const Format&); // Does nothing; for subclasses only

/**
     * @stable ICU 2.0
     */
    Format& operator=(const Format&); // Does nothing; for subclasses

/**
     * Simple function for initializing a UParseError from a UnicodeString.
     *
     * @param pattern The pattern to copy into the parseError
     * @param pos The position in pattern where the error occured
     * @param parseError The UParseError object to fill in
     * @stable ICU 2.4
     */
    static void syntaxError(const UnicodeString& pattern,
                            int32_t pos,
                            UParseError& parseError);

private:
    char actualLocale[ULOC_FULLNAME_CAPACITY];
    char validLocale[ULOC_FULLNAME_CAPACITY];
};

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // _FORMAT
//eof

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