1 /* //device/libs/android_runtime/android_text_AndroidBidi.cpp
3 ** Copyright 2010, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 #define LOG_TAG "AndroidUnicode"
21 #include <android_runtime/AndroidRuntime.h>
22 #include "utils/misc.h"
23 #include "utils/Log.h"
24 #include "unicode/ubidi.h"
28 static void jniThrowException(JNIEnv* env, const char* exc, const char* msg = NULL)
30 jclass excClazz = env->FindClass(exc);
31 LOG_ASSERT(excClazz, "Unable to find class %s", exc);
33 env->ThrowNew(excClazz, msg);
36 static jint runBidi(JNIEnv* env, jobject obj, jint dir, jcharArray chsArray,
37 jbyteArray infoArray, int n, jboolean haveInfo)
39 // Parameters are checked on java side
40 // Failures from GetXXXArrayElements indicate a serious out-of-memory condition
41 // that we don't bother to report, we're probably dead anyway.
43 jchar* chs = env->GetCharArrayElements(chsArray, NULL);
45 jbyte* info = env->GetByteArrayElements(infoArray, NULL);
47 UErrorCode status = U_ZERO_ERROR;
48 UBiDi* bidi = ubidi_openSized(n, 0, &status);
49 ubidi_setPara(bidi, chs, n, dir, NULL, &status);
50 if (U_SUCCESS(status)) {
51 for (int i = 0; i < n; ++i) {
52 info[i] = ubidi_getLevelAt(bidi, i);
54 result = ubidi_getParaLevel(bidi);
56 jniThrowException(env, "java/lang/RuntimeException", NULL);
60 env->ReleaseByteArrayElements(infoArray, info, 0);
62 env->ReleaseCharArrayElements(chsArray, chs, JNI_ABORT);
67 static JNINativeMethod gMethods[] = {
68 { "runBidi", "(I[C[BIZ)I",
72 int register_android_text_AndroidBidi(JNIEnv* env)
74 jclass clazz = env->FindClass("android/text/AndroidBidi");
75 LOG_ASSERT(clazz, "Cannot find android/text/AndroidBidi");
77 return AndroidRuntime::registerNativeMethods(env, "android/text/AndroidBidi",
78 gMethods, NELEM(gMethods));