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-// © 2016 and later: Unicode, Inc. and others.
-// License & terms of use: http://www.unicode.org/copyright.html
-/*
-********************************************************************************
-* Copyright (C) 1997-2013, International Business Machines
-* Corporation and others. All Rights Reserved.
-********************************************************************************
-*
-* File CHOICFMT.H
-*
-* Modification History:
-*
-* Date Name Description
-* 02/19/97 aliu Converted from java.
-* 03/20/97 helena Finished first cut of implementation and got rid
-* of nextDouble/previousDouble and replaced with
-* boolean array.
-* 4/10/97 aliu Clean up. Modified to work on AIX.
-* 8/6/97 nos Removed overloaded constructor, member var 'buffer'.
-* 07/22/98 stephen Removed operator!= (implemented in Format)
-********************************************************************************
-*/
-
-#ifndef CHOICFMT_H
-#define CHOICFMT_H
-
-#include "unicode/utypes.h"
-
-/**
- * \file
- * \brief C++ API: Choice Format.
- */
-
-#if !UCONFIG_NO_FORMATTING
-#ifndef U_HIDE_DEPRECATED_API
-
-#include "unicode/fieldpos.h"
-#include "unicode/format.h"
-#include "unicode/messagepattern.h"
-#include "unicode/numfmt.h"
-#include "unicode/unistr.h"
-
-U_NAMESPACE_BEGIN
-
-class MessageFormat;
-
-/**
- * ChoiceFormat converts between ranges of numeric values and strings for those ranges.
- * The strings must conform to the MessageFormat pattern syntax.
- *
- * <p><em><code>ChoiceFormat</code> is probably not what you need.
- * Please use <code>MessageFormat</code>
- * with <code>plural</code> arguments for proper plural selection,
- * and <code>select</code> arguments for simple selection among a fixed set of choices!</em></p>
- *
- * <p>A <code>ChoiceFormat</code> splits
- * the real number line \htmlonly<code>-&#x221E;</code> to
- * <code>+&#x221E;</code>\endhtmlonly into two
- * or more contiguous ranges. Each range is mapped to a
- * string.</p>
- *
- * <p><code>ChoiceFormat</code> was originally intended
- * for displaying grammatically correct
- * plurals such as &quot;There is one file.&quot; vs. &quot;There are 2 files.&quot;
- * <em>However,</em> plural rules for many languages
- * are too complex for the capabilities of ChoiceFormat,
- * and its requirement of specifying the precise rules for each message
- * is unmanageable for translators.</p>
- *
- * <p>There are two methods of defining a <code>ChoiceFormat</code>; both
- * are equivalent. The first is by using a string pattern. This is the
- * preferred method in most cases. The second method is through direct
- * specification of the arrays that logically make up the
- * <code>ChoiceFormat</code>.</p>
- *
- * <p>Note: Typically, choice formatting is done (if done at all) via <code>MessageFormat</code>
- * with a <code>choice</code> argument type,
- * rather than using a stand-alone <code>ChoiceFormat</code>.</p>
- *
- * <h5>Patterns and Their Interpretation</h5>
- *
- * <p>The pattern string defines the range boundaries and the strings for each number range.
- * Syntax:
- * <pre>
- * choiceStyle = number separator message ('|' number separator message)*
- * number = normal_number | ['-'] \htmlonly&#x221E;\endhtmlonly (U+221E, infinity)
- * normal_number = double value (unlocalized ASCII string)
- * separator = less_than | less_than_or_equal
- * less_than = '<'
- * less_than_or_equal = '#' | \htmlonly&#x2264;\endhtmlonly (U+2264)
- * message: see {@link MessageFormat}
- * </pre>
- * Pattern_White_Space between syntax elements is ignored, except
- * around each range's sub-message.</p>
- *
- * <p>Each numeric sub-range extends from the current range's number
- * to the next range's number.
- * The number itself is included in its range if a <code>less_than_or_equal</code> sign is used,
- * and excluded from its range (and instead included in the previous range)
- * if a <code>less_than</code> sign is used.</p>
- *
- * <p>When a <code>ChoiceFormat</code> is constructed from
- * arrays of numbers, closure flags and strings,
- * they are interpreted just like
- * the sequence of <code>(number separator string)</code> in an equivalent pattern string.
- * <code>closure[i]==TRUE</code> corresponds to a <code>less_than</code> separator sign.
- * The equivalent pattern string will be constructed automatically.</p>
- *
- * <p>During formatting, a number is mapped to the first range
- * where the number is not greater than the range's upper limit.
- * That range's message string is returned. A NaN maps to the very first range.</p>
- *
- * <p>During parsing, a range is selected for the longest match of
- * any range's message. That range's number is returned, ignoring the separator/closure.
- * Only a simple string match is performed, without parsing of arguments that
- * might be specified in the message strings.</p>
- *
- * <p>Note that the first range's number is ignored in formatting
- * but may be returned from parsing.</p>
- *
- * <h5>Examples</h5>
- *
- * <p>Here is an example of two arrays that map the number
- * <code>1..7</code> to the English day of the week abbreviations
- * <code>Sun..Sat</code>. No closures array is given; this is the same as
- * specifying all closures to be <code>FALSE</code>.</p>
- *
- * <pre> {1,2,3,4,5,6,7},
- * {&quot;Sun&quot;,&quot;Mon&quot;,&quot;Tue&quot;,&quot;Wed&quot;,&quot;Thur&quot;,&quot;Fri&quot;,&quot;Sat&quot;}</pre>
- *
- * <p>Here is an example that maps the ranges [-Inf, 1), [1, 1], and (1,
- * +Inf] to three strings. That is, the number line is split into three
- * ranges: x &lt; 1.0, x = 1.0, and x &gt; 1.0.
- * (The round parentheses in the notation above indicate an exclusive boundary,
- * like the turned bracket in European notation: [-Inf, 1) == [-Inf, 1[ )</p>
- *
- * <pre> {0, 1, 1},
- * {FALSE, FALSE, TRUE},
- * {&quot;no files&quot;, &quot;one file&quot;, &quot;many files&quot;}</pre>
- *
- * <p>Here is an example that shows formatting and parsing: </p>
- *
- * \code
- * #include <unicode/choicfmt.h>
- * #include <unicode/unistr.h>
- * #include <iostream.h>
- *
- * int main(int argc, char *argv[]) {
- * double limits[] = {1,2,3,4,5,6,7};
- * UnicodeString monthNames[] = {
- * "Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
- * ChoiceFormat fmt(limits, monthNames, 7);
- * UnicodeString str;
- * char buf[256];
- * for (double x = 1.0; x <= 8.0; x += 1.0) {
- * fmt.format(x, str);
- * str.extract(0, str.length(), buf, 256, "");
- * str.truncate(0);
- * cout << x << " -> "
- * << buf << endl;
- * }
- * cout << endl;
- * return 0;
- * }
- * \endcode
- *
- * <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.
- *
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
-class U_I18N_API ChoiceFormat: public NumberFormat {
-public:
- /**
- * Constructs a new ChoiceFormat from the pattern string.
- *
- * @param pattern Pattern used to construct object.
- * @param status Output param to receive success code. If the
- * pattern cannot be parsed, set to failure code.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- ChoiceFormat(const UnicodeString& pattern,
- UErrorCode& status);
-
-
- /**
- * Constructs a new ChoiceFormat with the given limits and message strings.
- * All closure flags default to <code>FALSE</code>,
- * equivalent to <code>less_than_or_equal</code> separators.
- *
- * Copies the limits and formats instead of adopting them.
- *
- * @param limits Array of limit values.
- * @param formats Array of formats.
- * @param count Size of 'limits' and 'formats' arrays.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- ChoiceFormat(const double* limits,
- const UnicodeString* formats,
- int32_t count );
-
- /**
- * Constructs a new ChoiceFormat with the given limits, closure flags and message strings.
- *
- * Copies the limits and formats instead of adopting them.
- *
- * @param limits Array of limit values
- * @param closures Array of booleans specifying whether each
- * element of 'limits' is open or closed. If FALSE, then the
- * corresponding limit number is a member of its range.
- * If TRUE, then the limit number belongs to the previous range it.
- * @param formats Array of formats
- * @param count Size of 'limits', 'closures', and 'formats' arrays
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- ChoiceFormat(const double* limits,
- const UBool* closures,
- const UnicodeString* formats,
- int32_t count);
-
- /**
- * Copy constructor.
- *
- * @param that ChoiceFormat object to be copied from
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- ChoiceFormat(const ChoiceFormat& that);
-
- /**
- * Assignment operator.
- *
- * @param that ChoiceFormat object to be copied
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- const ChoiceFormat& operator=(const ChoiceFormat& that);
-
- /**
- * Destructor.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual ~ChoiceFormat();
-
- /**
- * Clones this Format object. The caller owns the
- * result and must delete it when done.
- *
- * @return a copy of this object
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual Format* clone(void) const;
-
- /**
- * Returns true if the given Format objects are semantically equal.
- * Objects of different subclasses are considered unequal.
- *
- * @param other ChoiceFormat object to be compared
- * @return true if other is the same as this.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UBool operator==(const Format& other) const;
-
- /**
- * Sets the pattern.
- * @param pattern The pattern to be applied.
- * @param status Output param set to success/failure code on
- * exit. If the pattern is invalid, this will be
- * set to a failure result.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual void applyPattern(const UnicodeString& pattern,
- UErrorCode& status);
-
- /**
- * Sets the pattern.
- * @param pattern The pattern to be applied.
- * @param parseError Struct to receive information on position
- * of error if an error is encountered
- * @param status Output param set to success/failure code on
- * exit. If the pattern is invalid, this will be
- * set to a failure result.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual void applyPattern(const UnicodeString& pattern,
- UParseError& parseError,
- UErrorCode& status);
- /**
- * Gets the pattern.
- *
- * @param pattern Output param which will receive the pattern
- * Previous contents are deleted.
- * @return A reference to 'pattern'
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UnicodeString& toPattern(UnicodeString &pattern) const;
-
- /**
- * Sets the choices to be used in formatting.
- * For details see the constructor with the same parameter list.
- *
- * @param limitsToCopy Contains the top value that you want
- * parsed with that format,and should be in
- * ascending sorted order. When formatting X,
- * the choice will be the i, where limit[i]
- * &lt;= X &lt; limit[i+1].
- * @param formatsToCopy The format strings you want to use for each limit.
- * @param count The size of the above arrays.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual void setChoices(const double* limitsToCopy,
- const UnicodeString* formatsToCopy,
- int32_t count );
-
- /**
- * Sets the choices to be used in formatting.
- * For details see the constructor with the same parameter list.
- *
- * @param limits Array of limits
- * @param closures Array of limit booleans
- * @param formats Array of format string
- * @param count The size of the above arrays
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual void setChoices(const double* limits,
- const UBool* closures,
- const UnicodeString* formats,
- int32_t count);
-
- /**
- * Returns NULL and 0.
- * Before ICU 4.8, this used to return the choice limits array.
- *
- * @param count Will be set to 0.
- * @return NULL
- * @deprecated ICU 4.8 Use the MessagePattern class to analyze a ChoiceFormat pattern.
- */
- virtual const double* getLimits(int32_t& count) const;
-
- /**
- * Returns NULL and 0.
- * Before ICU 4.8, this used to return the limit booleans array.
- *
- * @param count Will be set to 0.
- * @return NULL
- * @deprecated ICU 4.8 Use the MessagePattern class to analyze a ChoiceFormat pattern.
- */
- virtual const UBool* getClosures(int32_t& count) const;
-
- /**
- * Returns NULL and 0.
- * Before ICU 4.8, this used to return the array of choice strings.
- *
- * @param count Will be set to 0.
- * @return NULL
- * @deprecated ICU 4.8 Use the MessagePattern class to analyze a ChoiceFormat pattern.
- */
- virtual const UnicodeString* getFormats(int32_t& count) const;
-
-
- using NumberFormat::format;
-
- /**
- * Formats a double number using this object's choices.
- *
- * @param number The value to be formatted.
- * @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.
- * @return Reference to 'appendTo' parameter.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UnicodeString& format(double number,
- UnicodeString& appendTo,
- FieldPosition& pos) const;
- /**
- * Formats an int32_t number using this object's choices.
- *
- * @param number The value to be formatted.
- * @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.
- * @return Reference to 'appendTo' parameter.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UnicodeString& format(int32_t number,
- UnicodeString& appendTo,
- FieldPosition& pos) const;
-
- /**
- * Formats an int64_t number using this object's choices.
- *
- * @param number The value to be formatted.
- * @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.
- * @return Reference to 'appendTo' parameter.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UnicodeString& format(int64_t number,
- UnicodeString& appendTo,
- FieldPosition& pos) const;
-
- /**
- * Formats an array of objects using this object's choices.
- *
- * @param objs The array of objects to be formatted.
- * @param cnt The size of objs.
- * @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 success Output param set to success/failure code on
- * exit.
- * @return Reference to 'appendTo' parameter.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UnicodeString& format(const Formattable* objs,
- int32_t cnt,
- UnicodeString& appendTo,
- FieldPosition& pos,
- UErrorCode& success) const;
-
- using NumberFormat::parse;
-
- /**
- * Looks for the longest match of any message string on the input text and,
- * if there is a match, sets the result object to the corresponding range's number.
- *
- * If no string matches, then the parsePosition is unchanged.
- *
- * @param text The text to be parsed.
- * @param result Formattable to be set to the parse result.
- * If parse fails, return contents are undefined.
- * @param parsePosition The position to start parsing at on input.
- * On output, moved to after the last successfully
- * parse character. On parse failure, does not change.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual void parse(const UnicodeString& text,
- Formattable& result,
- ParsePosition& parsePosition) const;
-
- /**
- * Returns a unique class ID POLYMORPHICALLY. Part of ICU's "poor man's RTTI".
- *
- * @return The class ID for this object. All objects of a
- * given class have the same class ID. Objects of
- * other classes have different class IDs.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- virtual UClassID getDynamicClassID(void) const;
-
- /**
- * Returns the class ID for this class. This is useful only for
- * comparing to a return value from getDynamicClassID(). For example:
- * <pre>
- * . Base* polymorphic_pointer = createPolymorphicObject();
- * . if (polymorphic_pointer->getDynamicClassID() ==
- * . Derived::getStaticClassID()) ...
- * </pre>
- * @return The class ID for all objects of this class.
- * @deprecated ICU 49 Use MessageFormat instead, with plural and select arguments.
- */
- static UClassID U_EXPORT2 getStaticClassID(void);
-
-private:
- /**
- * Converts a double value to a string.
- * @param value the double number to be converted.
- * @param string the result string.
- * @return the converted string.
- */
- static UnicodeString& dtos(double value, UnicodeString& string);
-
- ChoiceFormat(); // default constructor not implemented
-
- /**
- * Construct a new ChoiceFormat with the limits and the corresponding formats
- * based on the pattern.
- *
- * @param newPattern Pattern used to construct object.
- * @param parseError Struct to receive information on position
- * of error if an error is encountered.
- * @param status Output param to receive success code. If the
- * pattern cannot be parsed, set to failure code.
- */
- ChoiceFormat(const UnicodeString& newPattern,
- UParseError& parseError,
- UErrorCode& status);
-
- friend class MessageFormat;
-
- virtual void setChoices(const double* limits,
- const UBool* closures,
- const UnicodeString* formats,
- int32_t count,
- UErrorCode &errorCode);
-
- /**
- * Finds the ChoiceFormat sub-message for the given number.
- * @param pattern A MessagePattern.
- * @param partIndex the index of the first ChoiceFormat argument style part.
- * @param number a number to be mapped to one of the ChoiceFormat argument's intervals
- * @return the sub-message start part index.
- */
- static int32_t findSubMessage(const MessagePattern &pattern, int32_t partIndex, double number);
-
- static double parseArgument(
- const MessagePattern &pattern, int32_t partIndex,
- const UnicodeString &source, ParsePosition &pos);
-
- /**
- * Matches the pattern string from the end of the partIndex to
- * the beginning of the limitPartIndex,
- * including all syntax except SKIP_SYNTAX,
- * against the source string starting at sourceOffset.
- * If they match, returns the length of the source string match.
- * Otherwise returns -1.
- */
- static int32_t matchStringUntilLimitPart(
- const MessagePattern &pattern, int32_t partIndex, int32_t limitPartIndex,
- const UnicodeString &source, int32_t sourceOffset);
-
- /**
- * Some of the ChoiceFormat constructors do not have a UErrorCode paramater.
- * We need _some_ way to provide one for the MessagePattern constructor.
- * Alternatively, the MessagePattern could be a pointer field, but that is
- * not nice either.
- */
- UErrorCode constructorErrorCode;
-
- /**
- * The MessagePattern which contains the parsed structure of the pattern string.
- *
- * Starting with ICU 4.8, the MessagePattern contains a sequence of
- * numeric/selector/message parts corresponding to the parsed pattern.
- * For details see the MessagePattern class API docs.
- */
- MessagePattern msgPattern;
-
- /**
- * Docs & fields from before ICU 4.8, before MessagePattern was used.
- * Commented out, and left only for explanation of semantics.
- * --------
- * Each ChoiceFormat divides the range -Inf..+Inf into fCount
- * intervals. The intervals are:
- *
- * 0: fChoiceLimits[0]..fChoiceLimits[1]
- * 1: fChoiceLimits[1]..fChoiceLimits[2]
- * ...
- * fCount-2: fChoiceLimits[fCount-2]..fChoiceLimits[fCount-1]
- * fCount-1: fChoiceLimits[fCount-1]..+Inf
- *
- * Interval 0 is special; during formatting (mapping numbers to
- * strings), it also contains all numbers less than
- * fChoiceLimits[0], as well as NaN values.
- *
- * Interval i maps to and from string fChoiceFormats[i]. When
- * parsing (mapping strings to numbers), then intervals map to
- * their lower limit, that is, interval i maps to fChoiceLimit[i].
- *
- * The intervals may be closed, half open, or open. This affects
- * formatting but does not affect parsing. Interval i is affected
- * by fClosures[i] and fClosures[i+1]. If fClosures[i]
- * is FALSE, then the value fChoiceLimits[i] is in interval i.
- * That is, intervals i and i are:
- *
- * i-1: ... x < fChoiceLimits[i]
- * i: fChoiceLimits[i] <= x ...
- *
- * If fClosures[i] is TRUE, then the value fChoiceLimits[i] is
- * in interval i-1. That is, intervals i-1 and i are:
- *
- * i-1: ... x <= fChoiceLimits[i]
- * i: fChoiceLimits[i] < x ...
- *
- * Because of the nature of interval 0, fClosures[0] has no
- * effect.
- */
- // double* fChoiceLimits;
- // UBool* fClosures;
- // UnicodeString* fChoiceFormats;
- // int32_t fCount;
-};
-
-
-U_NAMESPACE_END
-
-#endif // U_HIDE_DEPRECATED_API
-#endif /* #if !UCONFIG_NO_FORMATTING */
-
-#endif // CHOICFMT_H
-//eof