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android13/external/icu/icu4c/source/i18n/plurrule_impl.h

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// © 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 (FixedDecimal((double)-0.00123456777))
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 UChar DOT = ((UChar) 0x002E);
static const UChar SINGLE_QUOTE = ((UChar) 0x0027);
static const UChar SLASH = ((UChar) 0x002F);
static const UChar BACKSLASH = ((UChar) 0x005C);
static const UChar SPACE = ((UChar) 0x0020);
static const UChar EXCLAMATION = ((UChar) 0x0021);
static const UChar QUOTATION_MARK = ((UChar) 0x0022);
static const UChar NUMBER_SIGN = ((UChar) 0x0023);
static const UChar PERCENT_SIGN = ((UChar) 0x0025);
static const UChar ASTERISK = ((UChar) 0x002A);
static const UChar COMMA = ((UChar) 0x002C);
static const UChar HYPHEN = ((UChar) 0x002D);
static const UChar U_ZERO = ((UChar) 0x0030);
static const UChar U_ONE = ((UChar) 0x0031);
static const UChar U_TWO = ((UChar) 0x0032);
static const UChar U_THREE = ((UChar) 0x0033);
static const UChar U_FOUR = ((UChar) 0x0034);
static const UChar U_FIVE = ((UChar) 0x0035);
static const UChar U_SIX = ((UChar) 0x0036);
static const UChar U_SEVEN = ((UChar) 0x0037);
static const UChar U_EIGHT = ((UChar) 0x0038);
static const UChar U_NINE = ((UChar) 0x0039);
static const UChar COLON = ((UChar) 0x003A);
static const UChar SEMI_COLON = ((UChar) 0x003B);
static const UChar EQUALS = ((UChar) 0x003D);
static const UChar AT = ((UChar) 0x0040);
static const UChar CAP_A = ((UChar) 0x0041);
static const UChar CAP_B = ((UChar) 0x0042);
static const UChar CAP_R = ((UChar) 0x0052);
static const UChar CAP_Z = ((UChar) 0x005A);
static const UChar LOWLINE = ((UChar) 0x005F);
static const UChar LEFTBRACE = ((UChar) 0x007B);
static const UChar RIGHTBRACE = ((UChar) 0x007D);
static const UChar TILDE = ((UChar) 0x007E);
static const UChar ELLIPSIS = ((UChar) 0x2026);
static const UChar LOW_A = ((UChar) 0x0061);
static const UChar LOW_B = ((UChar) 0x0062);
static const UChar LOW_C = ((UChar) 0x0063);
static const UChar LOW_D = ((UChar) 0x0064);
static const UChar LOW_E = ((UChar) 0x0065);
static const UChar LOW_F = ((UChar) 0x0066);
static const UChar LOW_G = ((UChar) 0x0067);
static const UChar LOW_H = ((UChar) 0x0068);
static const UChar LOW_I = ((UChar) 0x0069);
static const UChar LOW_J = ((UChar) 0x006a);
static const UChar LOW_K = ((UChar) 0x006B);
static const UChar LOW_L = ((UChar) 0x006C);
static const UChar LOW_M = ((UChar) 0x006D);
static const UChar LOW_N = ((UChar) 0x006E);
static const UChar LOW_O = ((UChar) 0x006F);
static const UChar LOW_P = ((UChar) 0x0070);
static const UChar LOW_Q = ((UChar) 0x0071);
static const UChar LOW_R = ((UChar) 0x0072);
static const UChar LOW_S = ((UChar) 0x0073);
static const UChar LOW_T = ((UChar) 0x0074);
static const UChar LOW_U = ((UChar) 0x0075);
static const UChar LOW_V = ((UChar) 0x0076);
static const UChar LOW_W = ((UChar) 0x0077);
static const UChar LOW_Y = ((UChar) 0x0079);
static const UChar LOW_Z = ((UChar) 0x007A);
}
static const int32_t PLURAL_RANGE_HIGH = 0x7fffffff;
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(UChar 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 1.2e7, 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() U_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 U_OVERRIDE;
bool isNaN() const U_OVERRIDE;
bool isInfinite() const U_OVERRIDE;
bool hasIntegerValue() const U_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(void);
virtual UClassID getDynamicClassID(void) 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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