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
24static 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
35static 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
62static JNINativeMethod gMethods[] = {
63    NATIVE_METHOD(NativeIDN, convertImpl, "(Ljava/lang/String;IZ)Ljava/lang/String;"),
64};
65void register_libcore_icu_NativeIDN(JNIEnv* env) {
66    jniRegisterNativeMethods(env, "libcore/icu/NativeIDN", gMethods, NELEM(gMethods));
67}
68