1 files changed, 126 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/numparse_parsednumber.cpp b/intl/icu/source/i18n/numparse_parsednumber.cpp
new file mode 100644
index 0000000000..4b373a3c31
--- /dev/null
+++ b/intl/icu/source/i18n/numparse_parsednumber.cpp
@@ -0,0 +1,126 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+// Allow implicit conversion from char16_t* to UnicodeString for this file:
+// Helpful in toString methods and elsewhere.
+#define UNISTR_FROM_STRING_EXPLICIT
+
+#include "numparse_types.h"
+#include "number_decimalquantity.h"
+#include "string_segment.h"
+#include "putilimp.h"
+#include <cmath>
+
+using namespace icu;
+using namespace icu::number;
+using namespace icu::number::impl;
+using namespace icu::numparse;
+using namespace icu::numparse::impl;
+
+
+ParsedNumber::ParsedNumber() {
+    clear();
+}
+
+void ParsedNumber::clear() {
+    quantity.bogus = true;
+    charEnd = 0;
+    flags = 0;
+    prefix.setToBogus();
+    suffix.setToBogus();
+    currencyCode[0] = 0;
+}
+
+void ParsedNumber::setCharsConsumed(const StringSegment& segment) {
+    charEnd = segment.getOffset();
+}
+
+void ParsedNumber::postProcess() {
+    if (!quantity.bogus && 0 != (flags & FLAG_NEGATIVE)) {
+        quantity.negate();
+    }
+}
+
+bool ParsedNumber::success() const {
+    return charEnd > 0 && 0 == (flags & FLAG_FAIL);
+}
+
+bool ParsedNumber::seenNumber() const {
+    return !quantity.bogus || 0 != (flags & FLAG_NAN) || 0 != (flags & FLAG_INFINITY);
+}
+
+double ParsedNumber::getDouble(UErrorCode& status) const {
+    bool sawNaN = 0 != (flags & FLAG_NAN);
+    bool sawInfinity = 0 != (flags & FLAG_INFINITY);
+
+    // Check for NaN, infinity, and -0.0
+    if (sawNaN) {
+        // Can't use NAN or std::nan because the byte pattern is platform-dependent;
+        // MSVC sets the sign bit, but Clang and GCC do not
+        return uprv_getNaN();
+    }
+    if (sawInfinity) {
+        if (0 != (flags & FLAG_NEGATIVE)) {
+            return -INFINITY;
+        } else {
+            return INFINITY;
+        }
+    }
+    if (quantity.bogus) {
+        status = U_INVALID_STATE_ERROR;
+        return 0.0;
+    }
+    if (quantity.isZeroish() && quantity.isNegative()) {
+        return -0.0;
+    }
+
+    if (quantity.fitsInLong()) {
+        return static_cast<double>(quantity.toLong());
+    } else {
+        return quantity.toDouble();
+    }
+}
+
+void ParsedNumber::populateFormattable(Formattable& output, parse_flags_t parseFlags) const {
+    bool sawNaN = 0 != (flags & FLAG_NAN);
+    bool sawInfinity = 0 != (flags & FLAG_INFINITY);
+    bool integerOnly = 0 != (parseFlags & PARSE_FLAG_INTEGER_ONLY);
+
+    // Check for NaN, infinity, and -0.0
+    if (sawNaN) {
+        // Can't use NAN or std::nan because the byte pattern is platform-dependent;
+        // MSVC sets the sign bit, but Clang and GCC do not
+        output.setDouble(uprv_getNaN());
+        return;
+    }
+    if (sawInfinity) {
+        if (0 != (flags & FLAG_NEGATIVE)) {
+            output.setDouble(-INFINITY);
+            return;
+        } else {
+            output.setDouble(INFINITY);
+            return;
+        }
+    }
+    U_ASSERT(!quantity.bogus);
+    if (quantity.isZeroish() && quantity.isNegative() && !integerOnly) {
+        output.setDouble(-0.0);
+        return;
+    }
+
+    // All other numbers
+    output.adoptDecimalQuantity(new DecimalQuantity(quantity));
+}
+
+bool ParsedNumber::isBetterThan(const ParsedNumber& other) {
+    // Favor results with strictly more characters consumed.
+    return charEnd > other.charEnd;
+}
+
+
+
+#endif /* #if !UCONFIG_NO_FORMATTING */