icuSources/i18n/number_utils.h

   1 // © 2017 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 __NUMBER_UTILS_H__
   8 #define __NUMBER_UTILS_H__
   9
  10 #include "unicode/numberformatter.h"
  11 #include "number_types.h"
  12 #include "number_decimalquantity.h"
  13 #include "number_scientific.h"
  14 #include "number_patternstring.h"
  15 #include "number_modifiers.h"
  16 #include "number_multiplier.h"
  17 #include "number_roundingutils.h"
  18 #include "decNumber.h"
  19 #include "charstr.h"
  20
  21 U_NAMESPACE_BEGIN
  22
  23 namespace number {
  24 namespace impl {
  25
  26 enum CldrPatternStyle {
  27     CLDR_PATTERN_STYLE_DECIMAL,
  28     CLDR_PATTERN_STYLE_CURRENCY,
  29     CLDR_PATTERN_STYLE_ACCOUNTING,
  30     CLDR_PATTERN_STYLE_PERCENT,
  31     CLDR_PATTERN_STYLE_SCIENTIFIC,
  32     CLDR_PATTERN_STYLE_COUNT,
  33 };
  34
  35 // Namespace for naked functions
  36 namespace utils {
  37
  38 inline int32_t insertDigitFromSymbols(NumberStringBuilder& output, int32_t index, int8_t digit,
  39                                       const DecimalFormatSymbols& symbols, Field field,
  40                                       UErrorCode& status) {
  41     if (symbols.getCodePointZero() != -1) {
  42         return output.insertCodePoint(index, symbols.getCodePointZero() + digit, field, status);
  43     }
  44     return output.insert(index, symbols.getConstDigitSymbol(digit), field, status);
  45 }
  46
  47 inline bool unitIsCurrency(const MeasureUnit& unit) {
  48     return uprv_strcmp("currency", unit.getType()) == 0;
  49 }
  50
  51 inline bool unitIsNoUnit(const MeasureUnit& unit) {
  52     return uprv_strcmp("none", unit.getType()) == 0;
  53 }
  54
  55 inline bool unitIsPercent(const MeasureUnit& unit) {
  56     return uprv_strcmp("percent", unit.getSubtype()) == 0;
  57 }
  58
  59 inline bool unitIsPermille(const MeasureUnit& unit) {
  60     return uprv_strcmp("permille", unit.getSubtype()) == 0;
  61 }
  62
  63 // NOTE: In Java, this method is in NumberFormat.java
  64 const char16_t*
  65 getPatternForStyle(const Locale& locale, const char* nsName, CldrPatternStyle style, UErrorCode& status);
  66
  67 /**
  68  * Computes the plural form for this number based on the specified set of rules.
  69  *
  70  * @param rules A {@link PluralRules} object representing the set of rules.
  71  * @return The {@link StandardPlural} according to the PluralRules. If the plural form is not in
  72  *     the set of standard plurals, {@link StandardPlural#OTHER} is returned instead.
  73  */
  74 inline StandardPlural::Form getStandardPlural(const PluralRules *rules,
  75                                               const IFixedDecimal &fdec) {
  76     if (rules == nullptr) {
  77         // Fail gracefully if the user didn't provide a PluralRules
  78         return StandardPlural::Form::OTHER;
  79     } else {
  80         UnicodeString ruleString = rules->select(fdec);
  81         return StandardPlural::orOtherFromString(ruleString);
  82     }
  83 }
  84
  85 } // namespace utils
  86
  87 } // namespace impl
  88 } // namespace number
  89
  90 U_NAMESPACE_END
  91
  92 #endif //__NUMBER_UTILS_H__
  93
  94 #endif /* #if !UCONFIG_NO_FORMATTING */