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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "NativePluralRules"
     18 
     19 #include "IcuUtilities.h"
     20 #include "JNIHelp.h"
     21 #include "JniConstants.h"
     22 #include "JniException.h"
     23 #include "ScopedUtfChars.h"
     24 #include "unicode/plurrule.h"
     25 
     26 #include <string>
     27 
     28 static PluralRules* toPluralRules(jlong address) {
     29     return reinterpret_cast<PluralRules*>(static_cast<uintptr_t>(address));
     30 }
     31 
     32 static void NativePluralRules_finalizeImpl(JNIEnv*, jclass, jlong address) {
     33     delete toPluralRules(address);
     34 }
     35 
     36 static jlong NativePluralRules_forLocaleImpl(JNIEnv* env, jclass, jstring javaLocaleName) {
     37     // The icu4c PluralRules returns a "other: n" default rule for the deprecated locales Java uses.
     38     // Work around this by translating back to the current language codes.
     39     std::string localeName(ScopedUtfChars(env, javaLocaleName).c_str());
     40     if (localeName[0] == 'i' && localeName[1] == 'w') {
     41         localeName[0] = 'h';
     42         localeName[1] = 'e';
     43     } else if (localeName[0] == 'i' && localeName[1] == 'n') {
     44         localeName[0] = 'i';
     45         localeName[1] = 'd';
     46     } else if (localeName[0] == 'j' && localeName[1] == 'i') {
     47         localeName[0] = 'y';
     48         localeName[1] = 'i';
     49     }
     50 
     51     Locale locale = Locale::createFromName(localeName.c_str());
     52     UErrorCode status = U_ZERO_ERROR;
     53     PluralRules* result = PluralRules::forLocale(locale, status);
     54     maybeThrowIcuException(env, "PluralRules::forLocale", status);
     55     return reinterpret_cast<uintptr_t>(result);
     56 }
     57 
     58 static jint NativePluralRules_quantityForIntImpl(JNIEnv*, jclass, jlong address, jint value) {
     59     UnicodeString keyword = toPluralRules(address)->select(value);
     60     if (keyword == "zero") {
     61         return 0;
     62     } else if (keyword == "one") {
     63         return 1;
     64     } else if (keyword == "two") {
     65         return 2;
     66     } else if (keyword == "few") {
     67         return 3;
     68     } else if (keyword == "many") {
     69         return 4;
     70     } else {
     71         return 5;
     72     }
     73 }
     74 
     75 static JNINativeMethod gMethods[] = {
     76     NATIVE_METHOD(NativePluralRules, finalizeImpl, "(J)V"),
     77     NATIVE_METHOD(NativePluralRules, forLocaleImpl, "(Ljava/lang/String;)J"),
     78     NATIVE_METHOD(NativePluralRules, quantityForIntImpl, "(JI)I"),
     79 };
     80 void register_libcore_icu_NativePluralRules(JNIEnv* env) {
     81     jniRegisterNativeMethods(env, "libcore/icu/NativePluralRules", gMethods, NELEM(gMethods));
     82 }
     83