// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright ( C ) 2007 - 2016 , International Business Machines Corporation and
* others . All Rights Reserved .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* File PLURRULE_IMPL . H
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
#ifndef PLURRULE_IMPL
#define PLURRULE_IMPL
// Internal definitions for the PluralRules implementation.
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/format.h"
#include "unicode/locid.h"
#include "unicode/parseerr.h"
#include "unicode/strenum.h"
#include "unicode/ures.h"
#include "uvector.h"
#include "hash.h"
#include "uassert.h"
/**
* A FixedDecimal version of UPLRULES_NO_UNIQUE_VALUE used in PluralRulesTest
* for parsing of samples .
*/
#define UPLRULES_NO_UNIQUE_VALUE_DECIMAL(ERROR_CODE) (DecimalQuantity::fromExponen
tString(u"-0.00123456777" , ERROR_CODE))
class PluralRulesTest;
U_NAMESPACE_BEGIN
class AndConstraint;
class RuleChain;
class DigitInterval;
class PluralRules;
class VisibleDigits;
namespace pluralimpl {
// TODO: Remove this and replace with u"" literals. Was for EBCDIC compatibility.
static const char16_t DOT = static_cast<char16_t>(0 x002E);
static const char16_t SINGLE_QUOTE = static_cast<char16_t>(0 x0027);
static const char16_t SLASH = static_cast<char16_t>(0 x002F);
static const char16_t BACKSLASH = static_cast<char16_t>(0 x005C);
static const char16_t SPACE = static_cast<char16_t>(0 x0020);
static const char16_t EXCLAMATION = static_cast<char16_t>(0 x0021);
static const char16_t QUOTATION_MARK = static_cast<char16_t>(0 x0022);
static const char16_t NUMBER_SIGN = static_cast<char16_t>(0 x0023);
static const char16_t PERCENT_SIGN = static_cast<char16_t>(0 x0025);
static const char16_t ASTERISK = static_cast<char16_t>(0 x002A);
static const char16_t COMMA = static_cast<char16_t>(0 x002C);
static const char16_t HYPHEN = static_cast<char16_t>(0 x002D);
static const char16_t U_ZERO = static_cast<char16_t>(0 x0030);
static const char16_t U_ONE = static_cast<char16_t>(0 x0031);
static const char16_t U_TWO = static_cast<char16_t>(0 x0032);
static const char16_t U_THREE = static_cast<char16_t>(0 x0033);
static const char16_t U_FOUR = static_cast<char16_t>(0 x0034);
static const char16_t U_FIVE = static_cast<char16_t>(0 x0035);
static const char16_t U_SIX = static_cast<char16_t>(0 x0036);
static const char16_t U_SEVEN = static_cast<char16_t>(0 x0037);
static const char16_t U_EIGHT = static_cast<char16_t>(0 x0038);
static const char16_t U_NINE = static_cast<char16_t>(0 x0039);
static const char16_t COLON = static_cast<char16_t>(0 x003A);
static const char16_t SEMI_COLON = static_cast<char16_t>(0 x003B);
static const char16_t EQUALS = static_cast<char16_t>(0 x003D);
static const char16_t AT = static_cast<char16_t>(0 x0040);
static const char16_t CAP_A = static_cast<char16_t>(0 x0041);
static const char16_t CAP_B = static_cast<char16_t>(0 x0042);
static const char16_t CAP_R = static_cast<char16_t>(0 x0052);
static const char16_t CAP_Z = static_cast<char16_t>(0 x005A);
static const char16_t LOWLINE = static_cast<char16_t>(0 x005F);
static const char16_t LEFTBRACE = static_cast<char16_t>(0 x007B);
static const char16_t RIGHTBRACE = static_cast<char16_t>(0 x007D);
static const char16_t TILDE = static_cast<char16_t>(0 x007E);
static const char16_t ELLIPSIS = static_cast<char16_t>(0 x2026);
static const char16_t LOW_A = static_cast<char16_t>(0 x0061);
static const char16_t LOW_B = static_cast<char16_t>(0 x0062);
static const char16_t LOW_C = static_cast<char16_t>(0 x0063);
static const char16_t LOW_D = static_cast<char16_t>(0 x0064);
static const char16_t LOW_E = static_cast<char16_t>(0 x0065);
static const char16_t LOW_F = static_cast<char16_t>(0 x0066);
static const char16_t LOW_G = static_cast<char16_t>(0 x0067);
static const char16_t LOW_H = static_cast<char16_t>(0 x0068);
static const char16_t LOW_I = static_cast<char16_t>(0 x0069);
static const char16_t LOW_J = static_cast<char16_t>(0 x006a);
static const char16_t LOW_K = static_cast<char16_t>(0 x006B);
static const char16_t LOW_L = static_cast<char16_t>(0 x006C);
static const char16_t LOW_M = static_cast<char16_t>(0 x006D);
static const char16_t LOW_N = static_cast<char16_t>(0 x006E);
static const char16_t LOW_O = static_cast<char16_t>(0 x006F);
static const char16_t LOW_P = static_cast<char16_t>(0 x0070);
static const char16_t LOW_Q = static_cast<char16_t>(0 x0071);
static const char16_t LOW_R = static_cast<char16_t>(0 x0072);
static const char16_t LOW_S = static_cast<char16_t>(0 x0073);
static const char16_t LOW_T = static_cast<char16_t>(0 x0074);
static const char16_t LOW_U = static_cast<char16_t>(0 x0075);
static const char16_t LOW_V = static_cast<char16_t>(0 x0076);
static const char16_t LOW_W = static_cast<char16_t>(0 x0077);
static const char16_t LOW_Y = static_cast<char16_t>(0 x0079);
static const char16_t LOW_Z = static_cast<char16_t>(0 x007A);
}
static const int32_t PLURAL_RANGE_HIGH = 0 x7fffffff;
enum tokenType {
none,
tNumber,
tComma,
tSemiColon,
tSpace,
tColon,
tAt, // '@'
tDot,
tDot2,
tEllipsis,
tKeyword,
tAnd,
tOr,
tMod, // 'mod' or '%'
tNot, // 'not' only.
tIn, // 'in' only.
tEqual, // '=' only.
tNotEqual, // '!='
tTilde,
tWithin,
tIs,
tVariableN,
tVariableI,
tVariableF,
tVariableV,
tVariableT,
tVariableE,
tVariableC,
tDecimal,
tInteger,
tEOF
};
class PluralRuleParser: public UMemory {
public:
PluralRuleParser();
virtual ~PluralRuleParser();
void parse(const UnicodeString &rules, PluralRules *dest, UErrorCode &status);
void getNextToken(UErrorCode &status);
void checkSyntax(UErrorCode &status);
static int32_t getNumberValue(const UnicodeString &token);
private :
static tokenType getKeyType(const UnicodeString& token, tokenType type);
static tokenType charType(char16_t ch);
static UBool isValidKeyword(const UnicodeString& token);
const UnicodeString *ruleSrc; // The rules string.
int32_t ruleIndex; // String index in the input rules, the current parse position.
UnicodeString token; // Token most recently scanned.
tokenType type;
tokenType prevType;
// The items currently being parsed & built.
// Note: currentChain may not be the last RuleChain in the
// list because the "other" chain is forced to the end.
AndConstraint *curAndConstraint;
RuleChain *currentChain;
int32_t rangeLowIdx; // Indices in the UVector of ranges of the
int32_t rangeHiIdx; // low and hi values currently being parsed.
enum EParseState {
kKeyword,
kExpr,
kValue,
kRangeList,
kSamples
};
};
enum PluralOperand {
/**
* The double value of the entire number .
*/
PLURAL_OPERAND_N,
/**
* The integer value , with the fraction digits truncated off .
*/
PLURAL_OPERAND_I,
/**
* All visible fraction digits as an integer , including trailing zeros .
*/
PLURAL_OPERAND_F,
/**
* Visible fraction digits as an integer , not including trailing zeros .
*/
PLURAL_OPERAND_T,
/**
* Number of visible fraction digits .
*/
PLURAL_OPERAND_V,
/**
* Number of visible fraction digits , not including trailing zeros .
*/
PLURAL_OPERAND_W,
/**
* Suppressed exponent for scientific notation ( exponent needed in
* scientific notation to approximate i ) .
*/
PLURAL_OPERAND_E,
/**
* This operand is currently treated as an alias for ` PLURAL_OPERAND_E ` .
* In the future , it will represent :
*
* Suppressed exponent for compact notation ( exponent needed in
* compact notation to approximate i ) .
*/
PLURAL_OPERAND_C,
/**
* THIS OPERAND IS DEPRECATED AND HAS BEEN REMOVED FROM THE SPEC .
*
* < p > Returns the integer value , but will fail if the number has fraction digits .
* That is , using " j " instead of " i " is like implicitly adding " v is 0 " .
*
* < p > For example , " j is 3 " is equivalent to " i is 3 and v is 0 " : it matches
* " 3 " but not " 3 . 1 " or " 3 . 0 " .
*/
PLURAL_OPERAND_J
};
/**
* Converts from the tokenType enum to PluralOperand . Asserts that the given
* tokenType can be mapped to a PluralOperand .
*/
PluralOperand tokenTypeToPluralOperand(tokenType tt);
/**
* An interface to FixedDecimal , allowing for other implementations .
* @ internal
*/
class U_I18N_API IFixedDecimal {
public:
virtual ~IFixedDecimal();
/**
* Returns the value corresponding to the specified operand ( n , i , f , t , v , or w ) .
* If the operand is ' n ' , returns a double ; otherwise , returns an integer .
*/
virtual double getPluralOperand(PluralOperand operand) const = 0 ;
virtual bool isNaN() const = 0 ;
virtual bool isInfinite() const = 0 ;
/** Whether the number has no nonzero fraction digits. */
virtual bool hasIntegerValue() const = 0 ;
};
/**
* class FixedDecimal serves to communicate the properties
* of a formatted number from a decimal formatter to PluralRules : : select ( )
*
* see DecimalFormat : : getFixedDecimal ( )
* @ internal
*/
class U_I18N_API FixedDecimal: public IFixedDecimal, public UObject {
public:
/**
* @ param n the number , e . g . 12 . 345
* @ param v The number of visible fraction digits , e . g . 3
* @ param f The fraction digits , e . g . 345
* @ param e The exponent , e . g . 7 in 1 . 2 e7 , for scientific notation
* @ param c Currently : an alias for param ` e ` .
*/
FixedDecimal(double n, int32_t v, int64_t f, int32_t e, int32_t c);
FixedDecimal(double n, int32_t v, int64_t f, int32_t e);
FixedDecimal(double n, int32_t v, int64_t f);
FixedDecimal(double n, int32_t);
explicit FixedDecimal(double n);
FixedDecimal();
~FixedDecimal() override;
FixedDecimal(const UnicodeString &s, UErrorCode &ec);
FixedDecimal(const FixedDecimal &other);
static FixedDecimal createWithExponent(double n, int32_t v, int32_t e);
double getPluralOperand(PluralOperand operand) const override;
bool isNaN() const override;
bool isInfinite() const override;
bool hasIntegerValue() const override;
bool isNanOrInfinity() const ; // used in decimfmtimpl.cpp
int32_t getVisibleFractionDigitCount() const ;
void init(double n, int32_t v, int64_t f, int32_t e, int32_t c);
void init(double n, int32_t v, int64_t f, int32_t e);
void init(double n, int32_t v, int64_t f);
void init(double n);
UBool quickInit(double n); // Try a fast-path only initialization,
// return true if successful.
void adjustForMinFractionDigits(int32_t min);
static int64_t getFractionalDigits(double n, int32_t v);
static int32_t decimals(double n);
FixedDecimal& operator =(const FixedDecimal& other) = default ;
bool operator ==(const FixedDecimal &other) const ;
UnicodeString toString() const ;
double doubleValue() const ;
int64_t longValue() const ;
double source;
int32_t visibleDecimalDigitCount;
int64_t decimalDigits;
int64_t decimalDigitsWithoutTrailingZeros;
int64_t intValue;
int32_t exponent;
UBool _hasIntegerValue;
UBool isNegative;
UBool _isNaN;
UBool _isInfinite;
};
class AndConstraint : public UMemory {
public:
typedef enum RuleOp {
NONE,
MOD
} RuleOp;
RuleOp op = AndConstraint::NONE;
int32_t opNum = -1 ; // for mod expressions, the right operand of the mod.
int32_t value = -1 ; // valid for 'is' rules only.
UVector32 *rangeList = nullptr; // for 'in', 'within' rules. Null otherwise.
UBool negated = false ; // true for negated rules.
UBool integerOnly = false ; // true for 'within' rules.
tokenType digitsType = none; // n | i | v | f constraint.
AndConstraint *next = nullptr;
// Internal error status, used for errors that occur during the copy constructor.
UErrorCode fInternalStatus = U_ZERO_ERROR;
AndConstraint() = default ;
AndConstraint(const AndConstraint& other);
virtual ~AndConstraint();
AndConstraint* add(UErrorCode& status);
// UBool isFulfilled(double number);
UBool isFulfilled(const IFixedDecimal &number);
};
class OrConstraint : public UMemory {
public:
AndConstraint *childNode = nullptr;
OrConstraint *next = nullptr;
// Internal error status, used for errors that occur during the copy constructor.
UErrorCode fInternalStatus = U_ZERO_ERROR;
OrConstraint() = default ;
OrConstraint(const OrConstraint& other);
virtual ~OrConstraint();
AndConstraint* add(UErrorCode& status);
// UBool isFulfilled(double number);
UBool isFulfilled(const IFixedDecimal &number);
};
class RuleChain : public UMemory {
public:
UnicodeString fKeyword;
RuleChain *fNext = nullptr;
OrConstraint *ruleHeader = nullptr;
UnicodeString fDecimalSamples; // Samples strings from rule source
UnicodeString fIntegerSamples; // without @decimal or @integer, otherwise unprocessed.
UBool fDecimalSamplesUnbounded = false ;
UBool fIntegerSamplesUnbounded = false ;
// Internal error status, used for errors that occur during the copy constructor.
UErrorCode fInternalStatus = U_ZERO_ERROR;
RuleChain() = default ;
RuleChain(const RuleChain& other);
virtual ~RuleChain();
UnicodeString select(const IFixedDecimal &number) const ;
void dumpRules(UnicodeString& result);
UErrorCode getKeywords(int32_t maxArraySize, UnicodeString *keywords, int32_t& arraySize) const ;
UBool isKeyword(const UnicodeString& keyword) const ;
};
class PluralKeywordEnumeration : public StringEnumeration {
public:
PluralKeywordEnumeration(RuleChain *header, UErrorCode& status);
virtual ~PluralKeywordEnumeration();
static UClassID U_EXPORT2 getStaticClassID();
virtual UClassID getDynamicClassID() const override;
virtual const UnicodeString* snext(UErrorCode& status) override;
virtual void reset(UErrorCode& status) override;
virtual int32_t count(UErrorCode& status) const override;
private :
int32_t pos;
UVector fKeywordNames;
};
class U_I18N_API PluralAvailableLocalesEnumeration: public StringEnumeration {
public:
PluralAvailableLocalesEnumeration(UErrorCode &status);
virtual ~PluralAvailableLocalesEnumeration();
virtual const char * next(int32_t *resultLength, UErrorCode& status) override;
virtual void reset(UErrorCode& status) override;
virtual int32_t count(UErrorCode& status) const override;
private :
UErrorCode fOpenStatus;
UResourceBundle *fLocales = nullptr;
UResourceBundle *fRes = nullptr;
};
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif // _PLURRULE_IMPL
//eof
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