505 lines
15 KiB
C++
505 lines
15 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1997-1999, 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 NUMFMT.CPP
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*
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* Modification History:
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*
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* Date Name Description
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* 02/19/97 aliu Converted from java.
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* 03/18/97 clhuang Implemented with C++ APIs.
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* 04/17/97 aliu Enlarged MAX_INTEGER_DIGITS to fully accomodate the
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* largest double, by default.
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* Changed DigitCount to int per code review.
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* 07/20/98 stephen Changed operator== to check for grouping
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* Changed setMaxIntegerDigits per Java implementation.
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* Changed setMinIntegerDigits per Java implementation.
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* Changed setMinFractionDigits per Java implementation.
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* Changed setMaxFractionDigits per Java implementation.
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********************************************************************************
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*/
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#include "unicode/numfmt.h"
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#include "unicode/locid.h"
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#include "unicode/resbund.h"
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#include "unicode/dcfmtsym.h"
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#include "unicode/decimfmt.h"
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#include <float.h>
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// If no number pattern can be located for a locale, this is the last
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// resort.
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static const UChar gLastResortDecimalPat[] = {
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0x23, 0x30, 0x2E, 0x23, 0x23, 0x23, 0x3B, 0x2D, 0x23, 0x30, 0x2E, 0x23, 0x23, 0x23, 0 /* "#0.###;-#0.###" */
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};
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static const UChar gLastResortCurrencyPat[] = {
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0x24, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x3B, 0x28, 0x24, 0x23, 0x30, 0x2E, 0x30, 0x30, 0x29, 0 /* "$#0.00;($#0.00)" */
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};
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static const UChar gLastResortPercentPat[] = {
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0x23, 0x30, 0x25, 0 /* "#0%" */
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};
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static const UChar gLastResortScientificPat[] = {
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0x23, 0x45, 0x30, 0 /* "#E0" */
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};
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// *****************************************************************************
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// class NumberFormat
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// *****************************************************************************
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U_NAMESPACE_BEGIN
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const char NumberFormat::fgClassID = 0; // Value is irrelevant
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// If the maximum base 10 exponent were 4, then the largest number would
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// be 99,999 which has 5 digits.
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const int32_t NumberFormat::fgMaxIntegerDigits = DBL_MAX_10_EXP + 1; // Should be ~40 ? --srl
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const int32_t NumberFormat::fgMinIntegerDigits = 127;
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const int32_t NumberFormat::fgNumberPatternsCount = 3;
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const UChar * const NumberFormat::fgLastResortNumberPatterns[] =
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{
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gLastResortDecimalPat,
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gLastResortCurrencyPat,
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gLastResortPercentPat,
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gLastResortScientificPat
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};
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// -------------------------------------
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// default constructor
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NumberFormat::NumberFormat()
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: fGroupingUsed(TRUE),
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fMaxIntegerDigits(fgMaxIntegerDigits),
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fMinIntegerDigits(1),
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fMaxFractionDigits(3), // invariant, >= minFractionDigits
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fMinFractionDigits(0),
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fParseIntegerOnly(FALSE)
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{
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}
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// -------------------------------------
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NumberFormat::~NumberFormat()
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{
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}
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// -------------------------------------
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// copy constructor
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NumberFormat::NumberFormat(const NumberFormat &source)
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: Format(source)
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{
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*this = source;
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}
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// -------------------------------------
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// assignment operator
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NumberFormat&
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NumberFormat::operator=(const NumberFormat& rhs)
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{
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if (this != &rhs)
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{
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fGroupingUsed = rhs.fGroupingUsed;
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fMaxIntegerDigits = rhs.fMaxIntegerDigits;
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fMinIntegerDigits = rhs.fMinIntegerDigits;
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fMaxFractionDigits = rhs.fMaxFractionDigits;
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fMinFractionDigits = rhs.fMinFractionDigits;
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fParseIntegerOnly = rhs.fParseIntegerOnly;
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}
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return *this;
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}
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// -------------------------------------
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UBool
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NumberFormat::operator==(const Format& that) const
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{
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NumberFormat* other = (NumberFormat*)&that;
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return ((this == &that) ||
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((Format::operator==(that) &&
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getDynamicClassID()== that.getDynamicClassID() &&
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fMaxIntegerDigits == other->fMaxIntegerDigits &&
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fMinIntegerDigits == other->fMinIntegerDigits &&
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fMaxFractionDigits == other->fMaxFractionDigits &&
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fMinFractionDigits == other->fMinFractionDigits &&
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fGroupingUsed == other->fGroupingUsed &&
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fParseIntegerOnly == other->fParseIntegerOnly)));
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}
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// -------------------------------------
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// Formats the number object and save the format
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// result in the toAppendTo string buffer.
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UnicodeString&
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NumberFormat::format(const Formattable& obj,
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UnicodeString& toAppendTo,
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FieldPosition& pos,
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UErrorCode& status) const
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{
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if (U_FAILURE(status)) return toAppendTo;
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if (obj.getType() == Formattable::kDouble) {
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return format(obj.getDouble(), toAppendTo, pos);
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}
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else if (obj.getType() == Formattable::kLong) {
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return format(obj.getLong(), toAppendTo, pos);
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}
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// can't try to format a non-numeric object
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else {
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status = U_INVALID_FORMAT_ERROR;
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return toAppendTo;
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}
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}
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// -------------------------------------
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// Parses the string and save the result object as well
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// as the final parsed position.
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void
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NumberFormat::parseObject(const UnicodeString& source,
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Formattable& result,
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ParsePosition& parse_pos) const
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{
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parse(source, result, parse_pos);
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}
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// -------------------------------------
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// Formats a double number and save the result in a string.
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UnicodeString&
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NumberFormat::format(double number, UnicodeString& toAppendTo) const
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{
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FieldPosition pos(0);
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return format(number, toAppendTo, pos);
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}
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// -------------------------------------
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// Formats a long number and save the result in a string.
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UnicodeString&
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NumberFormat::format(int32_t number, UnicodeString& toAppendTo) const
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{
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FieldPosition pos(0);
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return format(number, toAppendTo, pos);
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}
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// -------------------------------------
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// Parses the text and save the result object. If the returned
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// parse position is 0, that means the parsing failed, the status
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// code needs to be set to failure. Ignores the returned parse
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// position, otherwise.
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void
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NumberFormat::parse(const UnicodeString& text,
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Formattable& result,
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UErrorCode& status) const
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{
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if (U_FAILURE(status)) return;
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ParsePosition parsePosition(0);
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parse(text, result, parsePosition);
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if (parsePosition.getIndex() == 0) {
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status = U_INVALID_FORMAT_ERROR;
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}
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}
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// -------------------------------------
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// Sets to only parse integers.
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void
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NumberFormat::setParseIntegerOnly(UBool value)
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{
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fParseIntegerOnly = value;
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}
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// -------------------------------------
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// Create a number style NumberFormat instance with the default locale.
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NumberFormat*
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NumberFormat::createInstance(UErrorCode& status)
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{
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return createInstance(Locale::getDefault(), kNumberStyle, status);
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}
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// -------------------------------------
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// Create a number style NumberFormat instance with the inLocale locale.
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NumberFormat*
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NumberFormat::createInstance(const Locale& inLocale, UErrorCode& status)
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{
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return createInstance(inLocale, kNumberStyle, status);
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}
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// -------------------------------------
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// Create a currency style NumberFormat instance with the default locale.
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NumberFormat*
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NumberFormat::createCurrencyInstance(UErrorCode& status)
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{
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return createInstance(Locale::getDefault(), kCurrencyStyle, status);
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}
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// -------------------------------------
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// Create a currency style NumberFormat instance with the inLocale locale.
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NumberFormat*
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NumberFormat::createCurrencyInstance(const Locale& inLocale, UErrorCode& status)
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{
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return createInstance(inLocale, kCurrencyStyle, status);
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}
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// -------------------------------------
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// Create a percent style NumberFormat instance with the default locale.
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NumberFormat*
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NumberFormat::createPercentInstance(UErrorCode& status)
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{
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return createInstance(Locale::getDefault(), kPercentStyle, status);
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}
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// -------------------------------------
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// Create a percent style NumberFormat instance with the inLocale locale.
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NumberFormat*
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NumberFormat::createPercentInstance(const Locale& inLocale, UErrorCode& status)
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{
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return createInstance(inLocale, kPercentStyle, status);
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}
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// -------------------------------------
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// Create a scientific style NumberFormat instance with the default locale.
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NumberFormat*
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NumberFormat::createScientificInstance(UErrorCode& status)
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{
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return createInstance(Locale::getDefault(), kScientificStyle, status);
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}
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// -------------------------------------
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// Create a scientific style NumberFormat instance with the inLocale locale.
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NumberFormat*
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NumberFormat::createScientificInstance(const Locale& inLocale, UErrorCode& status)
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{
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return createInstance(inLocale, kScientificStyle, status);
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}
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// -------------------------------------
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const Locale*
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NumberFormat::getAvailableLocales(int32_t& count)
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{
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return Locale::getAvailableLocales(count);
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}
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// -------------------------------------
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// Checks if the thousand/10 thousand grouping is used in the
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// NumberFormat instance.
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UBool
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NumberFormat::isGroupingUsed() const
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{
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return fGroupingUsed;
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}
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// -------------------------------------
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// Sets to use the thousand/10 thousand grouping in the
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// NumberFormat instance.
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void
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NumberFormat::setGroupingUsed(UBool newValue)
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{
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fGroupingUsed = newValue;
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}
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// -------------------------------------
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// Gets the maximum number of digits for the integral part for
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// this NumberFormat instance.
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int32_t NumberFormat::getMaximumIntegerDigits() const
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{
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return fMaxIntegerDigits;
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}
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// -------------------------------------
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// Sets the maximum number of digits for the integral part for
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// this NumberFormat instance.
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void
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NumberFormat::setMaximumIntegerDigits(int32_t newValue)
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{
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fMaxIntegerDigits = uprv_max(0, uprv_min(newValue, fgMaxIntegerDigits));
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if(fMinIntegerDigits > fMaxIntegerDigits)
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fMinIntegerDigits = fMaxIntegerDigits;
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}
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// -------------------------------------
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// Gets the minimum number of digits for the integral part for
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// this NumberFormat instance.
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int32_t
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NumberFormat::getMinimumIntegerDigits() const
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{
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return fMinIntegerDigits;
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}
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// -------------------------------------
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// Sets the minimum number of digits for the integral part for
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// this NumberFormat instance.
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void
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NumberFormat::setMinimumIntegerDigits(int32_t newValue)
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{
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fMinIntegerDigits = uprv_max(0, uprv_min(newValue, fgMinIntegerDigits));
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if(fMinIntegerDigits > fMaxIntegerDigits)
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fMaxIntegerDigits = fMinIntegerDigits;
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}
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// -------------------------------------
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// Gets the maximum number of digits for the fractional part for
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// this NumberFormat instance.
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int32_t
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NumberFormat::getMaximumFractionDigits() const
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{
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return fMaxFractionDigits;
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}
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// -------------------------------------
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// Sets the maximum number of digits for the fractional part for
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// this NumberFormat instance.
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void
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NumberFormat::setMaximumFractionDigits(int32_t newValue)
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{
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fMaxFractionDigits = uprv_max(0, uprv_min(newValue, fgMaxIntegerDigits));
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if(fMaxFractionDigits < fMinFractionDigits)
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fMinFractionDigits = fMaxFractionDigits;
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}
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// -------------------------------------
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// Gets the minimum number of digits for the fractional part for
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// this NumberFormat instance.
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int32_t
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NumberFormat::getMinimumFractionDigits() const
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{
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return fMinFractionDigits;
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}
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// -------------------------------------
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// Sets the minimum number of digits for the fractional part for
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// this NumberFormat instance.
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void
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NumberFormat::setMinimumFractionDigits(int32_t newValue)
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{
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fMinFractionDigits = uprv_max(0, uprv_min(newValue, fgMinIntegerDigits));
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if (fMaxFractionDigits < fMinFractionDigits)
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fMaxFractionDigits = fMinFractionDigits;
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}
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// -------------------------------------
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// Creates the NumberFormat instance of the specified style (number, currency,
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// or percent) for the desired locale.
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NumberFormat*
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NumberFormat::createInstance(const Locale& desiredLocale,
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EStyles style,
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UErrorCode& status)
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{
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if (U_FAILURE(status)) return NULL;
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if (style < 0 || style >= kStyleCount) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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ResourceBundle resource((char *)0, desiredLocale, status);
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NumberFormat* f;
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if (U_FAILURE(status))
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{
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// We don't appear to have resource data available -- use the last-resort data
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status = U_USING_FALLBACK_ERROR;
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// Use the DecimalFormatSymbols constructor which uses last-resort data
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DecimalFormatSymbols* symbolsToAdopt = new DecimalFormatSymbols(status);
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if (symbolsToAdopt == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if (U_FAILURE(status)) {
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delete symbolsToAdopt; // This should never happen
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return NULL;
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}
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// Creates a DecimalFormat instance with the last resort number patterns.
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f = new DecimalFormat(fgLastResortNumberPatterns[style], symbolsToAdopt, status);
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if (f == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if (U_FAILURE(status)) {
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delete f;
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f = NULL;
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}
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return f;
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}
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ResourceBundle numberPatterns(resource.get(DecimalFormat::fgNumberPatterns, status));
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// If not all the styled patterns exists for the NumberFormat in this locale,
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// sets the status code to failure and returns nil.
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//if (patternCount < fgNumberPatternsCount) status = U_INVALID_FORMAT_ERROR;
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if (numberPatterns.getSize() < fgNumberPatternsCount)
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status = U_INVALID_FORMAT_ERROR;
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if (U_FAILURE(status))
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return NULL;
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// Loads the decimal symbols of the desired locale.
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DecimalFormatSymbols* symbolsToAdopt = new DecimalFormatSymbols(desiredLocale, status);
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if (symbolsToAdopt == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if (U_FAILURE(status)) {
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delete symbolsToAdopt;
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return NULL;
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}
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// Creates the specified decimal format style of the desired locale.
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if (style < numberPatterns.getSize()) {
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const UnicodeString pattern(numberPatterns.getStringEx(style, status));
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if (U_SUCCESS(status)) {
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f = new DecimalFormat(pattern, symbolsToAdopt, status);
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}
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else {
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return NULL;
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}
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}
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else {
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// If the requested style doesn't exist, use a last-resort style.
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// This is to support scientific styles before we have all the
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// resource data in place.
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f = new DecimalFormat(fgLastResortNumberPatterns[style], symbolsToAdopt, status);
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}
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if (f == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if (U_FAILURE(status)) {
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delete f;
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f = NULL;
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}
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return f;
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}
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U_NAMESPACE_END
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//eof
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