| 1 | // © 2018 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 | |
| 8 | // Allow implicit conversion from char16_t* to UnicodeString for this file: |
| 9 | // Helpful in toString methods and elsewhere. |
| 10 | #define UNISTR_FROM_STRING_EXPLICIT |
| 11 | |
| 12 | #include "numparse_types.h" |
| 13 | #include "number_decimalquantity.h" |
| 14 | #include "string_segment.h" |
| 15 | #include "putilimp.h" |
| 16 | #include <cmath> |
| 17 | |
| 18 | using namespace icu; |
| 19 | using namespace icu::number; |
| 20 | using namespace icu::number::impl; |
| 21 | using namespace icu::numparse; |
| 22 | using namespace icu::numparse::impl; |
| 23 | |
| 24 | |
| 25 | ParsedNumber::ParsedNumber() { |
| 26 | clear(); |
| 27 | } |
| 28 | |
| 29 | void ParsedNumber::clear() { |
| 30 | quantity.bogus = true; |
| 31 | charEnd = 0; |
| 32 | flags = 0; |
| 33 | prefix.setToBogus(); |
| 34 | suffix.setToBogus(); |
| 35 | currencyCode[0] = 0; |
| 36 | } |
| 37 | |
| 38 | void ParsedNumber::setCharsConsumed(const StringSegment& segment) { |
| 39 | charEnd = segment.getOffset(); |
| 40 | } |
| 41 | |
| 42 | void ParsedNumber::postProcess() { |
| 43 | if (!quantity.bogus && 0 != (flags & FLAG_NEGATIVE)) { |
| 44 | quantity.negate(); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | bool ParsedNumber::success() const { |
| 49 | return charEnd > 0 && 0 == (flags & FLAG_FAIL); |
| 50 | } |
| 51 | |
| 52 | bool ParsedNumber::seenNumber() const { |
| 53 | return !quantity.bogus || 0 != (flags & FLAG_NAN) || 0 != (flags & FLAG_INFINITY); |
| 54 | } |
| 55 | |
| 56 | double ParsedNumber::getDouble(UErrorCode& status) const { |
| 57 | bool sawNaN = 0 != (flags & FLAG_NAN); |
| 58 | bool sawInfinity = 0 != (flags & FLAG_INFINITY); |
| 59 | |
| 60 | // Check for NaN, infinity, and -0.0 |
| 61 | if (sawNaN) { |
| 62 | // Can't use NAN or std::nan because the byte pattern is platform-dependent; |
| 63 | // MSVC sets the sign bit, but Clang and GCC do not |
| 64 | return uprv_getNaN(); |
| 65 | } |
| 66 | if (sawInfinity) { |
| 67 | if (0 != (flags & FLAG_NEGATIVE)) { |
| 68 | return -INFINITY; |
| 69 | } else { |
| 70 | return INFINITY; |
| 71 | } |
| 72 | } |
| 73 | if (quantity.bogus) { |
| 74 | status = U_INVALID_STATE_ERROR; |
| 75 | return 0.0; |
| 76 | } |
| 77 | if (quantity.isZeroish() && quantity.isNegative()) { |
| 78 | return -0.0; |
| 79 | } |
| 80 | |
| 81 | if (quantity.fitsInLong()) { |
| 82 | return static_cast<double>(quantity.toLong()); |
| 83 | } else { |
| 84 | return quantity.toDouble(); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | void ParsedNumber::populateFormattable(Formattable& output, parse_flags_t parseFlags) const { |
| 89 | bool sawNaN = 0 != (flags & FLAG_NAN); |
| 90 | bool sawInfinity = 0 != (flags & FLAG_INFINITY); |
| 91 | bool integerOnly = 0 != (parseFlags & PARSE_FLAG_INTEGER_ONLY); |
| 92 | |
| 93 | // Check for NaN, infinity, and -0.0 |
| 94 | if (sawNaN) { |
| 95 | // Can't use NAN or std::nan because the byte pattern is platform-dependent; |
| 96 | // MSVC sets the sign bit, but Clang and GCC do not |
| 97 | output.setDouble(uprv_getNaN()); |
| 98 | return; |
| 99 | } |
| 100 | if (sawInfinity) { |
| 101 | if (0 != (flags & FLAG_NEGATIVE)) { |
| 102 | output.setDouble(-INFINITY); |
| 103 | return; |
| 104 | } else { |
| 105 | output.setDouble(INFINITY); |
| 106 | return; |
| 107 | } |
| 108 | } |
| 109 | U_ASSERT(!quantity.bogus); |
| 110 | if (quantity.isZeroish() && quantity.isNegative() && !integerOnly) { |
| 111 | output.setDouble(-0.0); |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | // All other numbers |
| 116 | output.adoptDecimalQuantity(new DecimalQuantity(quantity)); |
| 117 | } |
| 118 | |
| 119 | bool ParsedNumber::isBetterThan(const ParsedNumber& other) { |
| 120 | // Favor results with strictly more characters consumed. |
| 121 | return charEnd > other.charEnd; |
| 122 | } |
| 123 | |
| 124 | |
| 125 | |
| 126 | #endif /* #if !UCONFIG_NO_FORMATTING */ |