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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(ERROR_CODE) (DecimalQuantity::fromExponentString(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 = ((char16_t) 0x002E);
+static const char16_t SINGLE_QUOTE = ((char16_t) 0x0027);
+static const char16_t SLASH = ((char16_t) 0x002F);
+static const char16_t BACKSLASH = ((char16_t) 0x005C);
+static const char16_t SPACE = ((char16_t) 0x0020);
+static const char16_t EXCLAMATION = ((char16_t) 0x0021);
+static const char16_t QUOTATION_MARK = ((char16_t) 0x0022);
+static const char16_t NUMBER_SIGN = ((char16_t) 0x0023);
+static const char16_t PERCENT_SIGN = ((char16_t) 0x0025);
+static const char16_t ASTERISK = ((char16_t) 0x002A);
+static const char16_t COMMA = ((char16_t) 0x002C);
+static const char16_t HYPHEN = ((char16_t) 0x002D);
+static const char16_t U_ZERO = ((char16_t) 0x0030);
+static const char16_t U_ONE = ((char16_t) 0x0031);
+static const char16_t U_TWO = ((char16_t) 0x0032);
+static const char16_t U_THREE = ((char16_t) 0x0033);
+static const char16_t U_FOUR = ((char16_t) 0x0034);
+static const char16_t U_FIVE = ((char16_t) 0x0035);
+static const char16_t U_SIX = ((char16_t) 0x0036);
+static const char16_t U_SEVEN = ((char16_t) 0x0037);
+static const char16_t U_EIGHT = ((char16_t) 0x0038);
+static const char16_t U_NINE = ((char16_t) 0x0039);
+static const char16_t COLON = ((char16_t) 0x003A);
+static const char16_t SEMI_COLON = ((char16_t) 0x003B);
+static const char16_t EQUALS = ((char16_t) 0x003D);
+static const char16_t AT = ((char16_t) 0x0040);
+static const char16_t CAP_A = ((char16_t) 0x0041);
+static const char16_t CAP_B = ((char16_t) 0x0042);
+static const char16_t CAP_R = ((char16_t) 0x0052);
+static const char16_t CAP_Z = ((char16_t) 0x005A);
+static const char16_t LOWLINE = ((char16_t) 0x005F);
+static const char16_t LEFTBRACE = ((char16_t) 0x007B);
+static const char16_t RIGHTBRACE = ((char16_t) 0x007D);
+static const char16_t TILDE = ((char16_t) 0x007E);
+static const char16_t ELLIPSIS = ((char16_t) 0x2026);
+
+static const char16_t LOW_A = ((char16_t) 0x0061);
+static const char16_t LOW_B = ((char16_t) 0x0062);
+static const char16_t LOW_C = ((char16_t) 0x0063);
+static const char16_t LOW_D = ((char16_t) 0x0064);
+static const char16_t LOW_E = ((char16_t) 0x0065);
+static const char16_t LOW_F = ((char16_t) 0x0066);
+static const char16_t LOW_G = ((char16_t) 0x0067);
+static const char16_t LOW_H = ((char16_t) 0x0068);
+static const char16_t LOW_I = ((char16_t) 0x0069);
+static const char16_t LOW_J = ((char16_t) 0x006a);
+static const char16_t LOW_K = ((char16_t) 0x006B);
+static const char16_t LOW_L = ((char16_t) 0x006C);
+static const char16_t LOW_M = ((char16_t) 0x006D);
+static const char16_t LOW_N = ((char16_t) 0x006E);
+static const char16_t LOW_O = ((char16_t) 0x006F);
+static const char16_t LOW_P = ((char16_t) 0x0070);
+static const char16_t LOW_Q = ((char16_t) 0x0071);
+static const char16_t LOW_R = ((char16_t) 0x0072);
+static const char16_t LOW_S = ((char16_t) 0x0073);
+static const char16_t LOW_T = ((char16_t) 0x0074);
+static const char16_t LOW_U = ((char16_t) 0x0075);
+static const char16_t LOW_V = ((char16_t) 0x0076);
+static const char16_t LOW_W = ((char16_t) 0x0077);
+static const char16_t LOW_Y = ((char16_t) 0x0079);
+static const char16_t LOW_Z = ((char16_t) 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(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 1.2e7, 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() 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 10:52:46 +0000