235 lines
7.5 KiB
C++
235 lines
7.5 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 2007-2013, International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*
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* File PLURRULE_IMPL.H
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*
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*******************************************************************************
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*/
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#ifndef PLURRULE_IMPLE
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#define PLURRULE_IMPLE
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// Internal definitions for the PluralRules implementation.
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/format.h"
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#include "unicode/locid.h"
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#include "unicode/parseerr.h"
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#include "unicode/utypes.h"
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#include "uvector.h"
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#include "hash.h"
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U_NAMESPACE_BEGIN
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static const UChar DOT = ((UChar)0x002E);
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static const UChar SINGLE_QUOTE = ((UChar)0x0027);
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static const UChar SLASH = ((UChar)0x002F);
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static const UChar BACKSLASH = ((UChar)0x005C);
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static const UChar SPACE = ((UChar)0x0020);
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static const UChar EXCLAMATION = ((UChar)0x0021);
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static const UChar QUOTATION_MARK = ((UChar)0x0022);
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static const UChar NUMBER_SIGN = ((UChar)0x0023);
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static const UChar PERCENT_SIGN = ((UChar)0x0025);
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static const UChar ASTERISK = ((UChar)0x002A);
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static const UChar COMMA = ((UChar)0x002C);
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static const UChar HYPHEN = ((UChar)0x002D);
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static const UChar U_ZERO = ((UChar)0x0030);
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static const UChar U_ONE = ((UChar)0x0031);
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static const UChar U_TWO = ((UChar)0x0032);
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static const UChar U_THREE = ((UChar)0x0033);
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static const UChar U_FOUR = ((UChar)0x0034);
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static const UChar U_FIVE = ((UChar)0x0035);
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static const UChar U_SIX = ((UChar)0x0036);
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static const UChar U_SEVEN = ((UChar)0x0037);
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static const UChar U_EIGHT = ((UChar)0x0038);
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static const UChar U_NINE = ((UChar)0x0039);
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static const UChar COLON = ((UChar)0x003A);
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static const UChar SEMI_COLON = ((UChar)0x003B);
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static const UChar EQUALS = ((UChar)0x003D);
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static const UChar CAP_A = ((UChar)0x0041);
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static const UChar CAP_B = ((UChar)0x0042);
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static const UChar CAP_R = ((UChar)0x0052);
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static const UChar CAP_Z = ((UChar)0x005A);
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static const UChar LOWLINE = ((UChar)0x005F);
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static const UChar LEFTBRACE = ((UChar)0x007B);
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static const UChar RIGHTBRACE = ((UChar)0x007D);
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static const UChar LOW_A = ((UChar)0x0061);
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static const UChar LOW_B = ((UChar)0x0062);
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static const UChar LOW_C = ((UChar)0x0063);
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static const UChar LOW_D = ((UChar)0x0064);
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static const UChar LOW_E = ((UChar)0x0065);
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static const UChar LOW_F = ((UChar)0x0066);
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static const UChar LOW_G = ((UChar)0x0067);
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static const UChar LOW_H = ((UChar)0x0068);
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static const UChar LOW_I = ((UChar)0x0069);
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static const UChar LOW_J = ((UChar)0x006a);
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static const UChar LOW_K = ((UChar)0x006B);
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static const UChar LOW_L = ((UChar)0x006C);
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static const UChar LOW_M = ((UChar)0x006D);
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static const UChar LOW_N = ((UChar)0x006E);
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static const UChar LOW_O = ((UChar)0x006F);
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static const UChar LOW_P = ((UChar)0x0070);
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static const UChar LOW_Q = ((UChar)0x0071);
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static const UChar LOW_R = ((UChar)0x0072);
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static const UChar LOW_S = ((UChar)0x0073);
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static const UChar LOW_T = ((UChar)0x0074);
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static const UChar LOW_U = ((UChar)0x0075);
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static const UChar LOW_V = ((UChar)0x0076);
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static const UChar LOW_W = ((UChar)0x0077);
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static const UChar LOW_Y = ((UChar)0x0079);
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static const UChar LOW_Z = ((UChar)0x007A);
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static const int32_t PLURAL_RANGE_HIGH = 0x7fffffff;
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enum tokenType {
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none,
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tLetter,
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tNumber,
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tComma,
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tSemiColon,
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tSpace,
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tColon,
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tDot,
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tKeyword,
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tAnd,
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tOr,
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tMod,
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tNot,
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tIn,
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tWithin,
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tVariableN,
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tVariableI,
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tVariableF,
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tVariableV,
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tVariableJ,
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tVariableT,
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tIs,
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tEOF
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};
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class RuleParser : public UMemory {
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public:
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RuleParser();
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virtual ~RuleParser();
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void getNextToken(const UnicodeString& ruleData, int32_t *ruleIndex, UnicodeString& token,
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tokenType& type, UErrorCode &status);
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void checkSyntax(tokenType prevType, tokenType curType, UErrorCode &status);
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private:
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void getKeyType(const UnicodeString& token, tokenType& type, UErrorCode &status);
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UBool inRange(UChar ch, tokenType& type);
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UBool isValidKeyword(const UnicodeString& token);
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};
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class U_I18N_API NumberInfo: public UMemory {
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public:
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/**
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* @param n the number
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* @param v The number of visible fraction digits
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* @param f The fraction digits.
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*
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*/
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NumberInfo(double n, int32_t v, int64_t f);
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NumberInfo(double n, int32_t);
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explicit NumberInfo(double n);
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double get(tokenType operand) const;
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int32_t getVisibleFractionDigitCount() const;
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private:
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void init(double n, int32_t v, int64_t f);
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static int32_t getFractionalDigits(double n, int32_t v);
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static int32_t decimals(double n);
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double source;
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int32_t visibleFractionDigitCount;
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int64_t fractionalDigits;
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int64_t fractionalDigitsWithoutTrailingZeros;
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int64_t intValue;
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UBool hasIntegerValue;
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UBool isNegative;
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};
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class AndConstraint : public UMemory {
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public:
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typedef enum RuleOp {
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NONE,
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MOD
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} RuleOp;
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RuleOp op;
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int32_t opNum; // for mod expressions, the right operand of the mod.
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int32_t value; // valid for 'is' rules only.
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UVector32 *rangeList; // for 'in', 'within' rules. Null otherwise.
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UBool negated; // TRUE for negated rules.
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UBool integerOnly; // TRUE for 'within' rules.
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tokenType digitsType; // n | i | v | f constraint.
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AndConstraint *next;
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AndConstraint();
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AndConstraint(const AndConstraint& other);
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virtual ~AndConstraint();
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AndConstraint* add();
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// UBool isFulfilled(double number);
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UBool isFulfilled(const NumberInfo &number);
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UBool isLimited();
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};
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class OrConstraint : public UMemory {
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public:
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AndConstraint *childNode;
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OrConstraint *next;
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OrConstraint();
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OrConstraint(const OrConstraint& other);
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virtual ~OrConstraint();
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AndConstraint* add();
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// UBool isFulfilled(double number);
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UBool isFulfilled(const NumberInfo &number);
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UBool isLimited();
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};
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class RuleChain : public UMemory {
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public:
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OrConstraint *ruleHeader;
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UnicodeString keyword;
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RuleChain();
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RuleChain(const RuleChain& other);
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RuleChain *next;
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virtual ~RuleChain();
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UnicodeString select(const NumberInfo &number) const;
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void dumpRules(UnicodeString& result);
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UBool isLimited();
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UErrorCode getKeywords(int32_t maxArraySize, UnicodeString *keywords, int32_t& arraySize) const;
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UBool isKeyword(const UnicodeString& keyword) const;
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};
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class PluralKeywordEnumeration : public StringEnumeration {
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public:
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PluralKeywordEnumeration(RuleChain *header, UErrorCode& status);
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virtual ~PluralKeywordEnumeration();
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static UClassID U_EXPORT2 getStaticClassID(void);
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virtual UClassID getDynamicClassID(void) const;
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virtual const UnicodeString* snext(UErrorCode& status);
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virtual void reset(UErrorCode& status);
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virtual int32_t count(UErrorCode& status) const;
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private:
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int32_t pos;
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UVector fKeywordNames;
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};
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U_NAMESPACE_END
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#endif /* #if !UCONFIG_NO_FORMATTING */
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#endif // _PLURRULE_IMPL
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//eof
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