123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
// © 2018 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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// Allow implicit conversion from char16_t* to UnicodeString for this file:
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// Helpful in toString methods and elsewhere.
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#define UNISTR_FROM_STRING_EXPLICIT
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#include "numparse_types.h"
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#include "number_decimalquantity.h"
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#include "putilimp.h"
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#include <cmath>
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using namespace icu;
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using namespace icu::number;
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using namespace icu::number::impl;
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using namespace icu::numparse;
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using namespace icu::numparse::impl;
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ParsedNumber::ParsedNumber() {
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clear();
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}
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void ParsedNumber::clear() {
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quantity.bogus = true;
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charEnd = 0;
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flags = 0;
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prefix.setToBogus();
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suffix.setToBogus();
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currencyCode[0] = 0;
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}
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void ParsedNumber::setCharsConsumed(const StringSegment& segment) {
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charEnd = segment.getOffset();
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}
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void ParsedNumber::postProcess() {
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if (!quantity.bogus && 0 != (flags & FLAG_NEGATIVE)) {
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quantity.negate();
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}
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}
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bool ParsedNumber::success() const {
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return charEnd > 0 && 0 == (flags & FLAG_FAIL);
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}
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bool ParsedNumber::seenNumber() const {
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return !quantity.bogus || 0 != (flags & FLAG_NAN) || 0 != (flags & FLAG_INFINITY);
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}
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double ParsedNumber::getDouble() const {
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bool sawNaN = 0 != (flags & FLAG_NAN);
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bool sawInfinity = 0 != (flags & FLAG_INFINITY);
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// Check for NaN, infinity, and -0.0
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if (sawNaN) {
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// Can't use NAN or std::nan because the byte pattern is platform-dependent;
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// MSVC sets the sign bit, but Clang and GCC do not
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return uprv_getNaN();
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}
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if (sawInfinity) {
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if (0 != (flags & FLAG_NEGATIVE)) {
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return -INFINITY;
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} else {
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return INFINITY;
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}
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}
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U_ASSERT(!quantity.bogus);
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if (quantity.isZero() && quantity.isNegative()) {
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return -0.0;
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}
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if (quantity.fitsInLong()) {
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return static_cast<double>(quantity.toLong());
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} else {
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return quantity.toDouble();
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}
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}
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void ParsedNumber::populateFormattable(Formattable& output, parse_flags_t parseFlags) const {
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bool sawNaN = 0 != (flags & FLAG_NAN);
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bool sawInfinity = 0 != (flags & FLAG_INFINITY);
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bool integerOnly = 0 != (parseFlags & PARSE_FLAG_INTEGER_ONLY);
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// Check for NaN, infinity, and -0.0
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if (sawNaN) {
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// Can't use NAN or std::nan because the byte pattern is platform-dependent;
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// MSVC sets the sign bit, but Clang and GCC do not
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output.setDouble(uprv_getNaN());
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return;
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}
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if (sawInfinity) {
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if (0 != (flags & FLAG_NEGATIVE)) {
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output.setDouble(-INFINITY);
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return;
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} else {
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output.setDouble(INFINITY);
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return;
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}
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}
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U_ASSERT(!quantity.bogus);
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if (quantity.isZero() && quantity.isNegative() && !integerOnly) {
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output.setDouble(-0.0);
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return;
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}
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// All other numbers
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output.adoptDecimalQuantity(new DecimalQuantity(quantity));
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}
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bool ParsedNumber::isBetterThan(const ParsedNumber& other) {
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// Favor results with strictly more characters consumed.
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return charEnd > other.charEnd;
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}
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#endif /* #if !UCONFIG_NO_FORMATTING */
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