| /* //device/libs/android_runtime/android_text_AndroidCharacter.cpp |
| ** |
| ** Copyright 2006, The Android Open Source Project |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| #define LOG_TAG "AndroidUnicode" |
| |
| #include <jni.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include "utils/misc.h" |
| #include "utils/AndroidUnicode.h" |
| #include "utils/Log.h" |
| |
| namespace android { |
| |
| static void jniThrowException(JNIEnv* env, const char* exc, const char* msg = NULL) |
| { |
| jclass excClazz = env->FindClass(exc); |
| LOG_ASSERT(excClazz, "Unable to find class %s", exc); |
| |
| env->ThrowNew(excClazz, msg); |
| } |
| |
| static void getDirectionalities(JNIEnv* env, jobject obj, jcharArray srcArray, jbyteArray destArray, int count) |
| { |
| jchar* src = env->GetCharArrayElements(srcArray, NULL); |
| jbyte* dest = env->GetByteArrayElements(destArray, NULL); |
| if (src == NULL || dest == NULL) { |
| jniThrowException(env, "java/lang/NullPointerException", NULL); |
| goto DIRECTION_END; |
| } |
| |
| if (env->GetArrayLength(srcArray) < count || env->GetArrayLength(destArray) < count) { |
| jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL); |
| goto DIRECTION_END; |
| } |
| |
| for (int i = 0; i < count; i++) { |
| if (src[i] >= 0xD800 && src[i] <= 0xDBFF && |
| i + 1 < count && |
| src[i + 1] >= 0xDC00 && src[i + 1] <= 0xDFFF) { |
| int c = 0x00010000 + ((src[i] - 0xD800) << 10) + |
| (src[i + 1] & 0x3FF); |
| int dir = android::Unicode::getDirectionality(c); |
| |
| dest[i++] = dir; |
| dest[i] = dir; |
| } else { |
| int c = src[i]; |
| int dir = android::Unicode::getDirectionality(c); |
| |
| dest[i] = dir; |
| } |
| } |
| |
| DIRECTION_END: |
| env->ReleaseCharArrayElements(srcArray, src, JNI_ABORT); |
| env->ReleaseByteArrayElements(destArray, dest, JNI_ABORT); |
| } |
| |
| static jboolean mirror(JNIEnv* env, jobject obj, jcharArray charArray, int start, int count) |
| { |
| jchar* data = env->GetCharArrayElements(charArray, NULL); |
| bool ret = false; |
| |
| if (data == NULL) { |
| jniThrowException(env, "java/lang/NullPointerException", NULL); |
| goto MIRROR_END; |
| } |
| |
| if (start > start + count || env->GetArrayLength(charArray) < count) { |
| jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL); |
| goto MIRROR_END; |
| } |
| |
| for (int i = start; i < start + count; i++) { |
| // XXX this thinks it knows that surrogates are never mirrored |
| |
| int c1 = data[i]; |
| int c2 = android::Unicode::toMirror(c1); |
| |
| if (c1 != c2) { |
| data[i] = c2; |
| ret = true; |
| } |
| } |
| |
| MIRROR_END: |
| env->ReleaseCharArrayElements(charArray, data, JNI_ABORT); |
| return ret; |
| } |
| |
| static jchar getMirror(JNIEnv* env, jobject obj, jchar c) |
| { |
| return android::Unicode::toMirror(c); |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| { "getDirectionalities", "([C[BI)V", |
| (void*) getDirectionalities }, |
| { "mirror", "([CII)Z", |
| (void*) mirror }, |
| { "getMirror", "(C)C", |
| (void*) getMirror } |
| }; |
| |
| int register_android_text_AndroidCharacter(JNIEnv* env) |
| { |
| jclass clazz = env->FindClass("android/text/AndroidCharacter"); |
| LOG_ASSERT(clazz, "Cannot find android/text/AndroidCharacter"); |
| |
| return AndroidRuntime::registerNativeMethods(env, "android/text/AndroidCharacter", |
| gMethods, NELEM(gMethods)); |
| } |
| |
| } |