projects / apple / icu.git / blame
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|---|---|---|
| 2ca993e8 A |
1 | /* |
| 2 | ******************************************************************************* | |
| 3 | * Copyright (C) 2015, International Business Machines | |
| 4 | * Corporation and others. All Rights Reserved. | |
| 5 | ******************************************************************************* | |
| 6 | * smallintformatter.h | |
| 7 | * | |
| 8 | * created on: 2015jan06 | |
| 9 | * created by: Travis Keep | |
| 10 | */ | |
| 11 | ||
| 12 | #ifndef __SMALLINTFORMATTER_H__ | |
| 13 | #define __SMALLINTFORMATTER_H__ | |
| 14 | ||
| 15 | #include "unicode/uobject.h" | |
| 16 | #include "unicode/utypes.h" | |
| 17 | ||
| 18 | U_NAMESPACE_BEGIN | |
| 19 | ||
| 20 | class UnicodeString; | |
| 21 | ||
| 22 | /** | |
| 23 | * A representation an acceptable range of digit counts for integers. | |
| 24 | */ | |
| 25 | class U_I18N_API IntDigitCountRange : public UMemory { | |
| 26 | public: | |
| 27 | /** | |
| 28 | * No constraints: 0 up to INT32_MAX | |
| 29 | */ | |
| 30 | IntDigitCountRange() : fMin(0), fMax(INT32_MAX) { } | |
| 31 | IntDigitCountRange(int32_t min, int32_t max); | |
| 32 | int32_t pin(int32_t digitCount) const; | |
| 33 | int32_t getMax() const { return fMax; } | |
| 34 | int32_t getMin() const { return fMin; } | |
| 35 | private: | |
| 36 | int32_t fMin; | |
| 37 | int32_t fMax; | |
| 38 | }; | |
| 39 | ||
| 40 | ||
| 41 | /** | |
| 42 | * A formatter for small, positive integers. | |
| 43 | */ | |
| 44 | class U_I18N_API SmallIntFormatter : public UMemory { | |
| 45 | public: | |
| 46 | /** | |
| 47 | * Estimates the actual digit count needed to format positiveValue | |
| 48 | * using the given range of digit counts. | |
| 49 | * Returns a value that is at least the actual digit count needed. | |
| 50 | * | |
| 51 | * @param positiveValue the value to format | |
| 52 | * @param range the acceptable range of digit counts. | |
| 53 | */ | |
| 54 | static int32_t estimateDigitCount( | |
| 55 | int32_t positiveValue, const IntDigitCountRange &range); | |
| 56 | ||
| 57 | /** | |
| 58 | * Returns TRUE if this class can format positiveValue using | |
| 59 | * the given range of digit counts. | |
| 60 | * | |
| 61 | * @param positiveValue the value to format | |
| 62 | * @param range the acceptable range of digit counts. | |
| 63 | */ | |
| 64 | static UBool canFormat( | |
| 65 | int32_t positiveValue, const IntDigitCountRange &range); | |
| 66 | ||
| 67 | /** | |
| 68 | * Formats positiveValue using the given range of digit counts. | |
| 69 | * Always uses standard digits '0' through '9'. Formatted value is | |
| 70 | * left padded with '0' as necessary to achieve minimum digit count. | |
| 71 | * Does not produce any grouping separators or trailing decimal point. | |
| 72 | * Calling format to format a value with a particular digit count range | |
| 73 | * when canFormat indicates that the same value and digit count range | |
| 74 | * cannot be formatted results in undefined behavior. | |
| 75 | * | |
| 76 | * @param positiveValue the value to format | |
| 77 | * @param range the acceptable range of digit counts. | |
| 78 | */ | |
| 79 | static UnicodeString &format( | |
| 80 | int32_t positiveValue, | |
| 81 | const IntDigitCountRange &range, | |
| 82 | UnicodeString &appendTo); | |
| 83 | ||
| 84 | }; | |
| 85 | ||
| 86 | U_NAMESPACE_END | |
| 87 | ||
| 88 | #endif // __SMALLINTFORMATTER_H__ |