1 files changed, 126 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/currunit.cpp b/intl/icu/source/i18n/currunit.cpp
new file mode 100644
index 0000000000..98f28365cf
--- /dev/null
+++ b/intl/icu/source/i18n/currunit.cpp
@@ -0,0 +1,126 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+**********************************************************************
+* Copyright (c) 2004-2014, International Business Machines
+* Corporation and others.  All Rights Reserved.
+**********************************************************************
+* Author: Alan Liu
+* Created: April 26, 2004
+* Since: ICU 3.0
+**********************************************************************
+*/
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/currunit.h"
+#include "unicode/ustring.h"
+#include "unicode/uchar.h"
+#include "cstring.h"
+#include "uinvchar.h"
+#include "charstr.h"
+#include "ustr_imp.h"
+#include "measunit_impl.h"
+
+U_NAMESPACE_BEGIN
+
+CurrencyUnit::CurrencyUnit(ConstChar16Ptr _isoCode, UErrorCode& ec) {
+    // The constructor always leaves the CurrencyUnit in a valid state (with a 3-character currency code).
+    // Note: in ICU4J Currency.getInstance(), we check string length for 3, but in ICU4C we allow a
+    // non-NUL-terminated string to be passed as an argument, so it is not possible to check length.
+    // However, we allow a NUL-terminated empty string, which should have the same behavior as nullptr.
+    // Consider NUL-terminated strings of length 1 or 2 as invalid.
+    bool useDefault = false;
+    if (U_FAILURE(ec) || _isoCode == nullptr || _isoCode[0] == 0) {
+        useDefault = true;
+    } else if (_isoCode[1] == 0 || _isoCode[2] == 0) {
+        useDefault = true;
+        ec = U_ILLEGAL_ARGUMENT_ERROR;
+    } else if (!uprv_isInvariantUString(_isoCode, 3)) {
+        // TODO: Perform a more strict ASCII check like in ICU4J isAlpha3Code?
+        useDefault = true;
+        ec = U_INVARIANT_CONVERSION_ERROR;
+    } else {
+        for (int32_t i=0; i<3; i++) {
+            isoCode[i] = u_asciiToUpper(_isoCode[i]);
+        }
+        isoCode[3] = 0;
+    }
+    if (useDefault) {
+        uprv_memcpy(isoCode, kDefaultCurrency, sizeof(char16_t) * 4);
+    }
+    char simpleIsoCode[4];
+    u_UCharsToChars(isoCode, simpleIsoCode, 4);
+    initCurrency(simpleIsoCode);
+}
+
+CurrencyUnit::CurrencyUnit(StringPiece _isoCode, UErrorCode& ec) {
+    // Note: unlike the old constructor, reject empty arguments with an error.
+    char isoCodeBuffer[4];
+    const char* isoCodeToUse;
+    // uprv_memchr checks that the string contains no internal NULs
+    if (_isoCode.length() != 3 || uprv_memchr(_isoCode.data(), 0, 3) != nullptr) {
+        isoCodeToUse = kDefaultCurrency8;
+        ec = U_ILLEGAL_ARGUMENT_ERROR;
+    } else if (!uprv_isInvariantString(_isoCode.data(), 3)) {
+        // TODO: Perform a more strict ASCII check like in ICU4J isAlpha3Code?
+        isoCodeToUse = kDefaultCurrency8;
+        ec = U_INVARIANT_CONVERSION_ERROR;
+    } else {
+        // Have to use isoCodeBuffer to ensure the string is NUL-terminated
+        for (int32_t i=0; i<3; i++) {
+            isoCodeBuffer[i] = uprv_toupper(_isoCode.data()[i]);
+        }
+        isoCodeBuffer[3] = 0;
+        isoCodeToUse = isoCodeBuffer;
+    }
+    u_charsToUChars(isoCodeToUse, isoCode, 4);
+    initCurrency(isoCodeToUse);
+}
+
+CurrencyUnit::CurrencyUnit(const CurrencyUnit& other) : MeasureUnit(other) {
+    u_strcpy(isoCode, other.isoCode);
+}
+
+CurrencyUnit::CurrencyUnit(const MeasureUnit& other, UErrorCode& ec) : MeasureUnit(other) {
+    // Make sure this is a currency.
+    // OK to hard-code the string because we are comparing against another hard-coded string.
+    if (uprv_strcmp("currency", getType()) != 0) {
+        ec = U_ILLEGAL_ARGUMENT_ERROR;
+        isoCode[0] = 0;
+    } else {
+        // Get the ISO Code from the subtype field.
+        u_charsToUChars(getSubtype(), isoCode, 4);
+        isoCode[3] = 0; // make 100% sure it is NUL-terminated
+    }
+}
+
+CurrencyUnit::CurrencyUnit() : MeasureUnit() {
+    u_strcpy(isoCode, kDefaultCurrency);
+    char simpleIsoCode[4];
+    u_UCharsToChars(isoCode, simpleIsoCode, 4);
+    initCurrency(simpleIsoCode);
+}
+
+CurrencyUnit& CurrencyUnit::operator=(const CurrencyUnit& other) {
+    if (this == &other) {
+        return *this;
+    }
+    MeasureUnit::operator=(other);
+    u_strcpy(isoCode, other.isoCode);
+    return *this;
+}
+
+CurrencyUnit* CurrencyUnit::clone() const {
+    return new CurrencyUnit(*this);
+}
+
+CurrencyUnit::~CurrencyUnit() {
+}
+    
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CurrencyUnit)
+
+U_NAMESPACE_END
+
+#endif // !UCONFIG_NO_FORMATTING