Home | History | Annotate | Download | only in native 
      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 "NativeIDN"
     18 
     19 #include "JNIHelp.h"
     20 #include "JniConstants.h"
     21 #include "ScopedStringChars.h"
     22 #include "unicode/uidna.h"
     23 
     24 static bool isLabelSeparator(const UChar ch) {
     25     switch (ch) {
     26     case 0x3002: // ideographic full stop
     27     case 0xff0e: // fullwidth full stop
     28     case 0xff61: // halfwidth ideographic full stop
     29         return true;
     30     default:
     31         return false;
     32     }
     33 }
     34 
     35 static jstring NativeIDN_convertImpl(JNIEnv* env, jclass, jstring javaSrc, jint flags, jboolean toAscii) {
     36     ScopedStringChars src(env, javaSrc);
     37     if (src.get() == NULL) {
     38         return NULL;
     39     }
     40     UChar dst[256];
     41     UErrorCode status = U_ZERO_ERROR;
     42     size_t resultLength = toAscii
     43         ? uidna_IDNToASCII(src.get(), src.size(), &dst[0], sizeof(dst), flags, NULL, &status)
     44         : uidna_IDNToUnicode(src.get(), src.size(), &dst[0], sizeof(dst), flags, NULL, &status);
     45     if (U_FAILURE(status)) {
     46         jniThrowException(env, "java/lang/IllegalArgumentException", u_errorName(status));
     47         return NULL;
     48     }
     49     if (!toAscii) {
     50         // ICU only translates separators to ASCII for toASCII.
     51         // Java expects the translation for toUnicode too.
     52         // We may as well do this here, while the string is still mutable.
     53         for (size_t i = 0; i < resultLength; ++i) {
     54             if (isLabelSeparator(dst[i])) {
     55                 dst[i] = '.';
     56             }
     57         }
     58     }
     59     return env->NewString(&dst[0], resultLength);
     60 }
     61 
     62 static JNINativeMethod gMethods[] = {
     63     NATIVE_METHOD(NativeIDN, convertImpl, "(Ljava/lang/String;IZ)Ljava/lang/String;"),
     64 };
     65 void register_libcore_icu_NativeIDN(JNIEnv* env) {
     66     jniRegisterNativeMethods(env, "libcore/icu/NativeIDN", gMethods, NELEM(gMethods));
     67 }
     68