82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
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/* //device/libs/android_runtime/android_text_AndroidBidi.cpp
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**
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** Copyright 2010, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#define LOG_TAG "AndroidUnicode"
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#include <jni.h>
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#include <android_runtime/AndroidRuntime.h>
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#include "utils/misc.h"
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#include "utils/Log.h"
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#include "unicode/ubidi.h"
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namespace android {
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static void jniThrowException(JNIEnv* env, const char* exc, const char* msg = NULL)
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{
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jclass excClazz = env->FindClass(exc);
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LOG_ASSERT(excClazz, "Unable to find class %s", exc);
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env->ThrowNew(excClazz, msg);
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}
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static jint runBidi(JNIEnv* env, jobject obj, jint dir, jcharArray chsArray,
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jbyteArray infoArray, int n, jboolean haveInfo)
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{
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// Parameters are checked on java side
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// Failures from GetXXXArrayElements indicate a serious out-of-memory condition
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// that we don't bother to report, we're probably dead anyway.
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jint result = 0;
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jchar* chs = env->GetCharArrayElements(chsArray, NULL);
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if (chs != NULL) {
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jbyte* info = env->GetByteArrayElements(infoArray, NULL);
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if (info != NULL) {
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UErrorCode status = U_ZERO_ERROR;
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UBiDi* bidi = ubidi_openSized(n, 0, &status);
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ubidi_setPara(bidi, chs, n, dir, NULL, &status);
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if (U_SUCCESS(status)) {
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for (int i = 0; i < n; ++i) {
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info[i] = ubidi_getLevelAt(bidi, i);
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}
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result = ubidi_getParaLevel(bidi);
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} else {
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jniThrowException(env, "java/lang/RuntimeException", NULL);
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}
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ubidi_close(bidi);
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env->ReleaseByteArrayElements(infoArray, info, 0);
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}
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env->ReleaseCharArrayElements(chsArray, chs, JNI_ABORT);
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}
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return result;
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}
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static JNINativeMethod gMethods[] = {
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{ "runBidi", "(I[C[BIZ)I",
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(void*) runBidi }
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};
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int register_android_text_AndroidBidi(JNIEnv* env)
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{
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jclass clazz = env->FindClass("android/text/AndroidBidi");
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LOG_ASSERT(clazz, "Cannot find android/text/AndroidBidi");
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return AndroidRuntime::registerNativeMethods(env, "android/text/AndroidBidi",
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gMethods, NELEM(gMethods));
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}
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}
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