91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* smallintformatter.h
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*
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* created on: 2015jan06
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* created by: Travis Keep
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*/
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#ifndef __SMALLINTFORMATTER_H__
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#define __SMALLINTFORMATTER_H__
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#include "unicode/uobject.h"
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#include "unicode/utypes.h"
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U_NAMESPACE_BEGIN
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class UnicodeString;
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/**
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* A representation an acceptable range of digit counts for integers.
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*/
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class U_I18N_API IntDigitCountRange : public UMemory {
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public:
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/**
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* No constraints: 0 up to INT32_MAX
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*/
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IntDigitCountRange() : fMin(0), fMax(INT32_MAX) { }
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IntDigitCountRange(int32_t min, int32_t max);
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int32_t pin(int32_t digitCount) const;
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int32_t getMax() const { return fMax; }
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int32_t getMin() const { return fMin; }
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private:
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int32_t fMin;
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int32_t fMax;
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};
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/**
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* A formatter for small, positive integers.
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*/
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class U_I18N_API SmallIntFormatter : public UMemory {
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public:
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/**
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* Estimates the actual digit count needed to format positiveValue
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* using the given range of digit counts.
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* Returns a value that is at least the actual digit count needed.
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*
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* @param positiveValue the value to format
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* @param range the acceptable range of digit counts.
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*/
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static int32_t estimateDigitCount(
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int32_t positiveValue, const IntDigitCountRange &range);
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/**
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* Returns TRUE if this class can format positiveValue using
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* the given range of digit counts.
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*
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* @param positiveValue the value to format
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* @param range the acceptable range of digit counts.
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*/
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static UBool canFormat(
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int32_t positiveValue, const IntDigitCountRange &range);
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/**
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* Formats positiveValue using the given range of digit counts.
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* Always uses standard digits '0' through '9'. Formatted value is
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* left padded with '0' as necessary to achieve minimum digit count.
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* Does not produce any grouping separators or trailing decimal point.
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* Calling format to format a value with a particular digit count range
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* when canFormat indicates that the same value and digit count range
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* cannot be formatted results in undefined behavior.
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*
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* @param positiveValue the value to format
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* @param range the acceptable range of digit counts.
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*/
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static UnicodeString &format(
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int32_t positiveValue,
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const IntDigitCountRange &range,
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UnicodeString &appendTo);
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};
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U_NAMESPACE_END
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#endif // __SMALLINTFORMATTER_H__
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