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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 
ParsedNumber()25 ParsedNumber::ParsedNumber() {
26     clear();
27 }
28 
clear()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 
setCharsConsumed(const StringSegment & segment)38 void ParsedNumber::setCharsConsumed(const StringSegment& segment) {
39     charEnd = segment.getOffset();
40 }
41 
postProcess()42 void ParsedNumber::postProcess() {
43     if (!quantity.bogus && 0 != (flags & FLAG_NEGATIVE)) {
44         quantity.negate();
45     }
46 }
47 
success() const48 bool ParsedNumber::success() const {
49     return charEnd > 0 && 0 == (flags & FLAG_FAIL);
50 }
51 
seenNumber() const52 bool ParsedNumber::seenNumber() const {
53     return !quantity.bogus || 0 != (flags & FLAG_NAN) || 0 != (flags & FLAG_INFINITY);
54 }
55 
getDouble(UErrorCode & status) const56 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 
populateFormattable(Formattable & output,parse_flags_t parseFlags) const88 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 
isBetterThan(const ParsedNumber & other)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 */
127