icuSources/i18n/numparse_decimal.h

   1 // © 2018 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3
   4 #include "unicode/utypes.h"
   5
   6 #if !UCONFIG_NO_FORMATTING
   7 #ifndef __NUMPARSE_DECIMAL_H__
   8 #define __NUMPARSE_DECIMAL_H__
   9
  10 #include "unicode/uniset.h"
  11 #include "numparse_types.h"
  12
  13 U_NAMESPACE_BEGIN namespace numparse {
  14 namespace impl {
  15
  16 using ::icu::number::impl::Grouper;
  17
  18 class DecimalMatcher : public NumberParseMatcher, public UMemory {
  19   public:
  20     DecimalMatcher() = default;  // WARNING: Leaves the object in an unusable state
  21
  22     DecimalMatcher(const DecimalFormatSymbols& symbols, const Grouper& grouper,
  23                    parse_flags_t parseFlags);
  24
  25     bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
  26
  27     bool
  28     match(StringSegment& segment, ParsedNumber& result, int8_t exponentSign, UErrorCode& status) const;
  29
  30     bool smokeTest(const StringSegment& segment) const override;
  31
  32     UnicodeString toString() const override;
  33
  34   private:
  35     /** If true, only accept strings whose grouping sizes match the locale */
  36     bool requireGroupingMatch;
  37
  38     /** If true, do not accept grouping separators at all */
  39     bool groupingDisabled;
  40
  41     // Fraction grouping parsing is disabled for now but could be enabled later.
  42     // See http://bugs.icu-project.org/trac/ticket/10794
  43     // bool fractionGrouping;
  44
  45     /** If true, do not accept numbers in the fraction */
  46     bool integerOnly;
  47
  48     int16_t grouping1;
  49     int16_t grouping2;
  50
  51     UnicodeString groupingSeparator;
  52     UnicodeString decimalSeparator;
  53
  54     // Assumption: these sets all consist of single code points. If this assumption needs to be broken,
  55     // fix getLeadCodePoints() as well as matching logic. Be careful of the performance impact.
  56     const UnicodeSet* groupingUniSet;
  57     const UnicodeSet* decimalUniSet;
  58     const UnicodeSet* separatorSet;
  59     const UnicodeSet* leadSet;
  60
  61     // Make this class the owner of a few objects that could be allocated.
  62     // The first three LocalPointers are used for assigning ownership only.
  63     LocalPointer<const UnicodeSet> fLocalDecimalUniSet;
  64     LocalPointer<const UnicodeSet> fLocalSeparatorSet;
  65     LocalArray<const UnicodeString> fLocalDigitStrings;
  66
  67     bool validateGroup(int32_t sepType, int32_t count, bool isPrimary) const;
  68 };
  69
  70
  71 } // namespace impl
  72 } // namespace numparse
  73 U_NAMESPACE_END
  74
  75 #endif //__NUMPARSE_DECIMAL_H__
  76 #endif /* #if !UCONFIG_NO_FORMATTING */