1 files changed, 68 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/number_integerwidth.cpp b/intl/icu/source/i18n/number_integerwidth.cpp
new file mode 100644
index 0000000000..d62aef444d
--- /dev/null
+++ b/intl/icu/source/i18n/number_integerwidth.cpp
@@ -0,0 +1,68 @@
+// © 2017 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/numberformatter.h"
+#include "number_types.h"
+#include "number_decimalquantity.h"
+
+using namespace icu;
+using namespace icu::number;
+using namespace icu::number::impl;
+
+IntegerWidth::IntegerWidth(digits_t minInt, digits_t maxInt, bool formatFailIfMoreThanMaxDigits) {
+    fUnion.minMaxInt.fMinInt = minInt;
+    fUnion.minMaxInt.fMaxInt = maxInt;
+    fUnion.minMaxInt.fFormatFailIfMoreThanMaxDigits = formatFailIfMoreThanMaxDigits;
+}
+
+IntegerWidth IntegerWidth::zeroFillTo(int32_t minInt) {
+    if (minInt >= 0 && minInt <= kMaxIntFracSig) {
+        return {static_cast<digits_t>(minInt), -1, false};
+    } else {
+        return {U_NUMBER_ARG_OUTOFBOUNDS_ERROR};
+    }
+}
+
+IntegerWidth IntegerWidth::truncateAt(int32_t maxInt) {
+    if (fHasError) { return *this; }  // No-op on error
+    digits_t minInt = fUnion.minMaxInt.fMinInt;
+    if (maxInt >= 0 && maxInt <= kMaxIntFracSig && minInt <= maxInt) {
+        return {minInt, static_cast<digits_t>(maxInt), false};
+    } else if (maxInt == -1) {
+        return {minInt, -1, false};
+    } else {
+        return {U_NUMBER_ARG_OUTOFBOUNDS_ERROR};
+    }
+}
+
+void IntegerWidth::apply(impl::DecimalQuantity& quantity, UErrorCode& status) const {
+    if (fHasError) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+    } else if (fUnion.minMaxInt.fMaxInt == -1) {
+        quantity.setMinInteger(fUnion.minMaxInt.fMinInt);
+    } else {
+        // Enforce the backwards-compatibility feature "FormatFailIfMoreThanMaxDigits"
+        if (fUnion.minMaxInt.fFormatFailIfMoreThanMaxDigits &&
+            fUnion.minMaxInt.fMaxInt < quantity.getMagnitude()) {
+            status = U_ILLEGAL_ARGUMENT_ERROR;
+        }
+        quantity.setMinInteger(fUnion.minMaxInt.fMinInt);
+        quantity.applyMaxInteger(fUnion.minMaxInt.fMaxInt);
+    }
+}
+
+bool IntegerWidth::operator==(const IntegerWidth& other) const {
+    // Private operator==; do error and bogus checking first!
+    U_ASSERT(!fHasError);
+    U_ASSERT(!other.fHasError);
+    U_ASSERT(!isBogus());
+    U_ASSERT(!other.isBogus());
+    return fUnion.minMaxInt.fMinInt == other.fUnion.minMaxInt.fMinInt &&
+           fUnion.minMaxInt.fMaxInt == other.fUnion.minMaxInt.fMaxInt;
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */