1 files changed, 362 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/numsys.cpp b/intl/icu/source/i18n/numsys.cpp
new file mode 100644
index 0000000000..0d5c43e4b2
--- /dev/null
+++ b/intl/icu/source/i18n/numsys.cpp
@@ -0,0 +1,362 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2010-2015, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*
+*
+* File NUMSYS.CPP
+*
+* Modification History:*
+*   Date        Name        Description
+*
+********************************************************************************
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/localpointer.h"
+#include "unicode/uchar.h"
+#include "unicode/unistr.h"
+#include "unicode/ures.h"
+#include "unicode/ustring.h"
+#include "unicode/uloc.h"
+#include "unicode/schriter.h"
+#include "unicode/numsys.h"
+#include "cstring.h"
+#include "uassert.h"
+#include "ucln_in.h"
+#include "umutex.h"
+#include "uresimp.h"
+#include "numsys_impl.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+U_NAMESPACE_BEGIN
+
+// Useful constants
+
+#define DEFAULT_DIGITS UNICODE_STRING_SIMPLE("0123456789")
+static const char gNumberingSystems[] = "numberingSystems";
+static const char gNumberElements[] = "NumberElements";
+static const char gDefault[] = "default";
+static const char gNative[] = "native";
+static const char gTraditional[] = "traditional";
+static const char gFinance[] = "finance";
+static const char gDesc[] = "desc";
+static const char gRadix[] = "radix";
+static const char gAlgorithmic[] = "algorithmic";
+static const char gLatn[] = "latn";
+
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(NumberingSystem)
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(NumsysNameEnumeration)
+
+    /**
+     * Default Constructor.
+     *
+     * @draft ICU 4.2
+     */
+
+NumberingSystem::NumberingSystem() {
+     radix = 10;
+     algorithmic = false;
+     UnicodeString defaultDigits = DEFAULT_DIGITS;
+     desc.setTo(defaultDigits);
+     uprv_strcpy(name,gLatn);
+}
+
+    /**
+     * Copy constructor.
+     * @draft ICU 4.2
+     */
+
+NumberingSystem::NumberingSystem(const NumberingSystem& other) 
+:  UObject(other) {
+    *this=other;
+}
+
+NumberingSystem* U_EXPORT2
+NumberingSystem::createInstance(int32_t radix_in, UBool isAlgorithmic_in, const UnicodeString & desc_in, UErrorCode &status) {
+
+    if (U_FAILURE(status)) {
+        return nullptr;
+    }
+
+    if ( radix_in < 2 ) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return nullptr;
+    }
+
+    if ( !isAlgorithmic_in ) {
+       if ( desc_in.countChar32() != radix_in ) {
+           status = U_ILLEGAL_ARGUMENT_ERROR;
+           return nullptr;
+       }
+    }
+
+    LocalPointer<NumberingSystem> ns(new NumberingSystem(), status);
+    if (U_FAILURE(status)) {
+        return nullptr;
+    }
+
+    ns->setRadix(radix_in);
+    ns->setDesc(desc_in);
+    ns->setAlgorithmic(isAlgorithmic_in);
+    ns->setName(nullptr);
+
+    return ns.orphan();
+}
+
+NumberingSystem* U_EXPORT2
+NumberingSystem::createInstance(const Locale & inLocale, UErrorCode& status) {
+
+    if (U_FAILURE(status)) {
+        return nullptr;
+    }
+
+    UBool nsResolved = true;
+    UBool usingFallback = false;
+    char buffer[ULOC_KEYWORDS_CAPACITY] = "";
+    int32_t count = inLocale.getKeywordValue("numbers", buffer, sizeof(buffer), status);
+    if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING) {
+        // the "numbers" keyword exceeds ULOC_KEYWORDS_CAPACITY; ignore and use default.
+        count = 0;
+        status = U_ZERO_ERROR;
+    }
+    if ( count > 0 ) { // @numbers keyword was specified in the locale
+        U_ASSERT(count < ULOC_KEYWORDS_CAPACITY);
+        buffer[count] = '\0'; // Make sure it is null terminated.
+        if ( !uprv_strcmp(buffer,gDefault) || !uprv_strcmp(buffer,gNative) || 
+             !uprv_strcmp(buffer,gTraditional) || !uprv_strcmp(buffer,gFinance)) {
+            nsResolved = false;
+        }
+    } else {
+        uprv_strcpy(buffer, gDefault);
+        nsResolved = false;
+    }
+
+    if (!nsResolved) { // Resolve the numbering system ( default, native, traditional or finance ) into a "real" numbering system
+        UErrorCode localStatus = U_ZERO_ERROR;
+        LocalUResourceBundlePointer resource(ures_open(nullptr, inLocale.getName(), &localStatus));
+        LocalUResourceBundlePointer numberElementsRes(ures_getByKey(resource.getAlias(), gNumberElements, nullptr, &localStatus));
+        // Don't stomp on the catastrophic failure of OOM.
+        if (localStatus == U_MEMORY_ALLOCATION_ERROR) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+            return nullptr;
+        }
+        while (!nsResolved) {
+            localStatus = U_ZERO_ERROR;
+            count = 0;
+            const char16_t *nsName = ures_getStringByKeyWithFallback(numberElementsRes.getAlias(), buffer, &count, &localStatus);
+            // Don't stomp on the catastrophic failure of OOM.
+            if (localStatus == U_MEMORY_ALLOCATION_ERROR) {
+                status = U_MEMORY_ALLOCATION_ERROR;
+                return nullptr;
+            }
+            if ( count > 0 && count < ULOC_KEYWORDS_CAPACITY ) { // numbering system found
+                u_UCharsToChars(nsName, buffer, count);
+                buffer[count] = '\0'; // Make sure it is null terminated.
+                nsResolved = true;
+            } 
+
+            if (!nsResolved) { // Fallback behavior per TR35 - traditional falls back to native, finance and native fall back to default
+                if (!uprv_strcmp(buffer,gNative) || !uprv_strcmp(buffer,gFinance)) { 
+                    uprv_strcpy(buffer,gDefault);
+                } else if (!uprv_strcmp(buffer,gTraditional)) {
+                    uprv_strcpy(buffer,gNative);
+                } else { // If we get here we couldn't find even the default numbering system
+                    usingFallback = true;
+                    nsResolved = true;
+                }
+            }
+        }
+    }
+
+    if (usingFallback) {
+        status = U_USING_FALLBACK_WARNING;
+        NumberingSystem *ns = new NumberingSystem();
+        if (ns == nullptr) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+        }
+        return ns;
+    } else {
+        return NumberingSystem::createInstanceByName(buffer, status);
+    }
+ }
+
+NumberingSystem* U_EXPORT2
+NumberingSystem::createInstance(UErrorCode& status) {
+    return NumberingSystem::createInstance(Locale::getDefault(), status);
+}
+
+NumberingSystem* U_EXPORT2
+NumberingSystem::createInstanceByName(const char *name, UErrorCode& status) {
+    int32_t radix = 10;
+    int32_t algorithmic = 0;
+
+    LocalUResourceBundlePointer numberingSystemsInfo(ures_openDirect(nullptr, gNumberingSystems, &status));
+    LocalUResourceBundlePointer nsCurrent(ures_getByKey(numberingSystemsInfo.getAlias(), gNumberingSystems, nullptr, &status));
+    LocalUResourceBundlePointer nsTop(ures_getByKey(nsCurrent.getAlias(), name, nullptr, &status));
+
+    UnicodeString nsd = ures_getUnicodeStringByKey(nsTop.getAlias(), gDesc, &status);
+
+    ures_getByKey(nsTop.getAlias(), gRadix, nsCurrent.getAlias(), &status);
+    radix = ures_getInt(nsCurrent.getAlias(), &status);
+
+    ures_getByKey(nsTop.getAlias(), gAlgorithmic, nsCurrent.getAlias(), &status);
+    algorithmic = ures_getInt(nsCurrent.getAlias(), &status);
+
+    UBool isAlgorithmic = ( algorithmic == 1 );
+
+    if (U_FAILURE(status)) {
+        // Don't stomp on the catastrophic failure of OOM.
+        if (status != U_MEMORY_ALLOCATION_ERROR) {
+            status = U_UNSUPPORTED_ERROR;
+        }
+        return nullptr;
+    }
+
+    LocalPointer<NumberingSystem> ns(NumberingSystem::createInstance(radix, isAlgorithmic, nsd, status), status);
+    if (U_FAILURE(status)) {
+        return nullptr;
+    }
+    ns->setName(name);
+    return ns.orphan();
+}
+
+    /**
+     * Destructor.
+     * @draft ICU 4.2
+     */
+NumberingSystem::~NumberingSystem() {
+}
+
+int32_t NumberingSystem::getRadix() const {
+    return radix;
+}
+
+UnicodeString NumberingSystem::getDescription() const {
+    return desc;
+}
+
+const char * NumberingSystem::getName() const {
+    return name;
+}
+
+void NumberingSystem::setRadix(int32_t r) {
+    radix = r;
+}
+
+void NumberingSystem::setAlgorithmic(UBool c) {
+    algorithmic = c;
+}
+
+void NumberingSystem::setDesc(const UnicodeString &d) {
+    desc.setTo(d);
+}
+void NumberingSystem::setName(const char *n) {
+    if ( n == nullptr ) {
+        name[0] = (char) 0;
+    } else {
+        uprv_strncpy(name,n,kInternalNumSysNameCapacity);
+        name[kInternalNumSysNameCapacity] = '\0'; // Make sure it is null terminated.
+    }
+}
+UBool NumberingSystem::isAlgorithmic() const {
+    return ( algorithmic );
+}
+
+namespace {
+
+UVector* gNumsysNames = nullptr;
+UInitOnce gNumSysInitOnce {};
+
+U_CFUNC UBool U_CALLCONV numSysCleanup() {
+    delete gNumsysNames;
+    gNumsysNames = nullptr;
+    gNumSysInitOnce.reset();
+    return true;
+}
+
+U_CFUNC void initNumsysNames(UErrorCode &status) {
+    U_ASSERT(gNumsysNames == nullptr);
+    ucln_i18n_registerCleanup(UCLN_I18N_NUMSYS, numSysCleanup);
+
+    // TODO: Simple array of UnicodeString objects, based on length of table resource?
+    LocalPointer<UVector> numsysNames(new UVector(uprv_deleteUObject, nullptr, status), status);
+    if (U_FAILURE(status)) {
+        return;
+    }
+
+    UErrorCode rbstatus = U_ZERO_ERROR;
+    UResourceBundle *numberingSystemsInfo = ures_openDirect(nullptr, "numberingSystems", &rbstatus);
+    numberingSystemsInfo =
+            ures_getByKey(numberingSystemsInfo, "numberingSystems", numberingSystemsInfo, &rbstatus);
+    if (U_FAILURE(rbstatus)) {
+        // Don't stomp on the catastrophic failure of OOM.
+        if (rbstatus == U_MEMORY_ALLOCATION_ERROR) {
+            status = rbstatus;
+        } else {
+            status = U_MISSING_RESOURCE_ERROR;
+        }
+        ures_close(numberingSystemsInfo);
+        return;
+    }
+
+    while ( ures_hasNext(numberingSystemsInfo) && U_SUCCESS(status) ) {
+        LocalUResourceBundlePointer nsCurrent(ures_getNextResource(numberingSystemsInfo, nullptr, &rbstatus));
+        if (rbstatus == U_MEMORY_ALLOCATION_ERROR) {
+            status = rbstatus; // we want to report OOM failure back to the caller.
+            break;
+        }
+        const char *nsName = ures_getKey(nsCurrent.getAlias());
+        LocalPointer<UnicodeString> newElem(new UnicodeString(nsName, -1, US_INV), status);
+        numsysNames->adoptElement(newElem.orphan(), status);
+    }
+
+    ures_close(numberingSystemsInfo);
+    if (U_SUCCESS(status)) {
+        gNumsysNames = numsysNames.orphan();
+    }
+    return;
+}
+
+}   // end anonymous namespace
+
+StringEnumeration* NumberingSystem::getAvailableNames(UErrorCode &status) {
+    umtx_initOnce(gNumSysInitOnce, &initNumsysNames, status);
+    LocalPointer<StringEnumeration> result(new NumsysNameEnumeration(status), status);
+    return result.orphan();
+}
+
+NumsysNameEnumeration::NumsysNameEnumeration(UErrorCode& status) : pos(0) {
+    (void)status;
+}
+
+const UnicodeString*
+NumsysNameEnumeration::snext(UErrorCode& status) {
+    if (U_SUCCESS(status) && (gNumsysNames != nullptr) && (pos < gNumsysNames->size())) {
+        return (const UnicodeString*)gNumsysNames->elementAt(pos++);
+    }
+    return nullptr;
+}
+
+void
+NumsysNameEnumeration::reset(UErrorCode& /*status*/) {
+    pos=0;
+}
+
+int32_t
+NumsysNameEnumeration::count(UErrorCode& /*status*/) const {
+    return (gNumsysNames==nullptr) ? 0 : gNumsysNames->size();
+}
+
+NumsysNameEnumeration::~NumsysNameEnumeration() {
+}
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+//eof