418 lines
14 KiB
C++
418 lines
14 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/android/jni_array.h"
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#include "base/android/jni_android.h"
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#include "base/android/jni_string.h"
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#include "base/logging.h"
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namespace base {
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namespace android {
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namespace {
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// As |GetArrayLength| makes no guarantees about the returned value (e.g., it
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// may be -1 if |array| is not a valid Java array), provide a safe wrapper
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// that always returns a valid, non-negative size.
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template <typename JavaArrayType>
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size_t SafeGetArrayLength(JNIEnv* env, const JavaRef<JavaArrayType>& jarray) {
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DCHECK(jarray);
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jsize length = env->GetArrayLength(jarray.obj());
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DCHECK_GE(length, 0) << "Invalid array length: " << length;
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return static_cast<size_t>(std::max(0, length));
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}
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} // namespace
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ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(JNIEnv* env,
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const uint8_t* bytes,
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size_t len) {
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jbyteArray byte_array = env->NewByteArray(len);
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CheckException(env);
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DCHECK(byte_array);
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env->SetByteArrayRegion(byte_array, 0, len,
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reinterpret_cast<const jbyte*>(bytes));
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CheckException(env);
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return ScopedJavaLocalRef<jbyteArray>(env, byte_array);
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}
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ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(
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JNIEnv* env,
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base::span<const uint8_t> bytes) {
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return ToJavaByteArray(env, bytes.data(), bytes.size());
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}
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ScopedJavaLocalRef<jbyteArray> ToJavaByteArray(JNIEnv* env,
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const std::string& str) {
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return ToJavaByteArray(env, reinterpret_cast<const uint8_t*>(str.data()),
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str.size());
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}
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ScopedJavaLocalRef<jbooleanArray> ToJavaBooleanArray(JNIEnv* env,
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const bool* bools,
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size_t len) {
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jbooleanArray boolean_array = env->NewBooleanArray(len);
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CheckException(env);
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DCHECK(boolean_array);
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env->SetBooleanArrayRegion(boolean_array, 0, len,
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reinterpret_cast<const jboolean*>(bools));
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CheckException(env);
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return ScopedJavaLocalRef<jbooleanArray>(env, boolean_array);
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}
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ScopedJavaLocalRef<jintArray> ToJavaIntArray(JNIEnv* env,
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const int* ints,
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size_t len) {
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jintArray int_array = env->NewIntArray(len);
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CheckException(env);
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DCHECK(int_array);
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env->SetIntArrayRegion(int_array, 0, len,
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reinterpret_cast<const jint*>(ints));
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CheckException(env);
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return ScopedJavaLocalRef<jintArray>(env, int_array);
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}
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ScopedJavaLocalRef<jintArray> ToJavaIntArray(JNIEnv* env,
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base::span<const int> ints) {
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return ToJavaIntArray(env, ints.data(), ints.size());
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}
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ScopedJavaLocalRef<jlongArray> ToJavaLongArray(JNIEnv* env,
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const int64_t* longs,
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size_t len) {
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jlongArray long_array = env->NewLongArray(len);
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CheckException(env);
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DCHECK(long_array);
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env->SetLongArrayRegion(long_array, 0, len,
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reinterpret_cast<const jlong*>(longs));
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CheckException(env);
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return ScopedJavaLocalRef<jlongArray>(env, long_array);
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}
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// Returns a new Java long array converted from the given int64_t array.
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BASE_EXPORT ScopedJavaLocalRef<jlongArray> ToJavaLongArray(
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JNIEnv* env,
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base::span<const int64_t> longs) {
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return ToJavaLongArray(env, longs.data(), longs.size());
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}
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// Returns a new Java float array converted from the given C++ float array.
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BASE_EXPORT ScopedJavaLocalRef<jfloatArray>
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ToJavaFloatArray(JNIEnv* env, const float* floats, size_t len) {
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jfloatArray float_array = env->NewFloatArray(len);
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CheckException(env);
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DCHECK(float_array);
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env->SetFloatArrayRegion(float_array, 0, len,
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reinterpret_cast<const jfloat*>(floats));
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CheckException(env);
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return ScopedJavaLocalRef<jfloatArray>(env, float_array);
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}
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BASE_EXPORT ScopedJavaLocalRef<jfloatArray> ToJavaFloatArray(
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JNIEnv* env,
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base::span<const float> floats) {
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return ToJavaFloatArray(env, floats.data(), floats.size());
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}
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BASE_EXPORT ScopedJavaLocalRef<jdoubleArray>
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ToJavaDoubleArray(JNIEnv* env, const double* doubles, size_t len) {
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jdoubleArray double_array = env->NewDoubleArray(len);
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CheckException(env);
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DCHECK(double_array);
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env->SetDoubleArrayRegion(double_array, 0, len,
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reinterpret_cast<const jdouble*>(doubles));
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CheckException(env);
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return ScopedJavaLocalRef<jdoubleArray>(env, double_array);
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}
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BASE_EXPORT ScopedJavaLocalRef<jdoubleArray> ToJavaDoubleArray(
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JNIEnv* env,
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base::span<const double> doubles) {
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return ToJavaDoubleArray(env, doubles.data(), doubles.size());
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}
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ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
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JNIEnv* env,
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base::span<const std::string> v) {
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ScopedJavaLocalRef<jclass> byte_array_clazz = GetClass(env, "[B");
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jobjectArray joa =
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env->NewObjectArray(v.size(), byte_array_clazz.obj(), nullptr);
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CheckException(env);
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for (size_t i = 0; i < v.size(); ++i) {
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ScopedJavaLocalRef<jbyteArray> byte_array = ToJavaByteArray(
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env, reinterpret_cast<const uint8_t*>(v[i].data()), v[i].length());
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env->SetObjectArrayElement(joa, i, byte_array.obj());
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}
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return ScopedJavaLocalRef<jobjectArray>(env, joa);
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}
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ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfByteArray(
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JNIEnv* env,
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base::span<std::vector<uint8_t>> v) {
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ScopedJavaLocalRef<jclass> byte_array_clazz = GetClass(env, "[B");
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jobjectArray joa =
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env->NewObjectArray(v.size(), byte_array_clazz.obj(), nullptr);
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CheckException(env);
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for (size_t i = 0; i < v.size(); ++i) {
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ScopedJavaLocalRef<jbyteArray> byte_array =
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ToJavaByteArray(env, v[i].data(), v[i].size());
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env->SetObjectArrayElement(joa, i, byte_array.obj());
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}
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return ScopedJavaLocalRef<jobjectArray>(env, joa);
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}
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ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
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JNIEnv* env,
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base::span<const std::string> v) {
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ScopedJavaLocalRef<jclass> string_clazz = GetClass(env, "java/lang/String");
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jobjectArray joa = env->NewObjectArray(v.size(), string_clazz.obj(), nullptr);
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CheckException(env);
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for (size_t i = 0; i < v.size(); ++i) {
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ScopedJavaLocalRef<jstring> item = ConvertUTF8ToJavaString(env, v[i]);
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env->SetObjectArrayElement(joa, i, item.obj());
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}
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return ScopedJavaLocalRef<jobjectArray>(env, joa);
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}
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ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStringArray(
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JNIEnv* env,
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base::span<const std::vector<string16>> vec_outer) {
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ScopedJavaLocalRef<jclass> string_array_clazz =
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GetClass(env, "[Ljava/lang/String;");
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jobjectArray joa =
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env->NewObjectArray(vec_outer.size(), string_array_clazz.obj(), nullptr);
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CheckException(env);
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for (size_t i = 0; i < vec_outer.size(); ++i) {
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ScopedJavaLocalRef<jobjectArray> inner =
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ToJavaArrayOfStrings(env, vec_outer[i]);
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env->SetObjectArrayElement(joa, i, inner.obj());
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}
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return ScopedJavaLocalRef<jobjectArray>(env, joa);
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}
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ScopedJavaLocalRef<jobjectArray> ToJavaArrayOfStrings(
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JNIEnv* env,
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base::span<const string16> v) {
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ScopedJavaLocalRef<jclass> string_clazz = GetClass(env, "java/lang/String");
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jobjectArray joa = env->NewObjectArray(v.size(), string_clazz.obj(), nullptr);
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CheckException(env);
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for (size_t i = 0; i < v.size(); ++i) {
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ScopedJavaLocalRef<jstring> item = ConvertUTF16ToJavaString(env, v[i]);
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env->SetObjectArrayElement(joa, i, item.obj());
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}
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return ScopedJavaLocalRef<jobjectArray>(env, joa);
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}
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void AppendJavaStringArrayToStringVector(JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<string16>* out) {
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DCHECK(out);
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if (!array)
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return;
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size_t len = SafeGetArrayLength(env, array);
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size_t back = out->size();
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out->resize(back + len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jstring> str(
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env, static_cast<jstring>(env->GetObjectArrayElement(array.obj(), i)));
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ConvertJavaStringToUTF16(env, str.obj(), out->data() + back + i);
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}
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}
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void AppendJavaStringArrayToStringVector(JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<std::string>* out) {
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DCHECK(out);
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if (!array)
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return;
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size_t len = SafeGetArrayLength(env, array);
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size_t back = out->size();
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out->resize(back + len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jstring> str(
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env, static_cast<jstring>(env->GetObjectArrayElement(array.obj(), i)));
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ConvertJavaStringToUTF8(env, str.obj(), out->data() + back + i);
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}
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}
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void AppendJavaByteArrayToByteVector(JNIEnv* env,
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const JavaRef<jbyteArray>& byte_array,
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std::vector<uint8_t>* out) {
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DCHECK(out);
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if (!byte_array)
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return;
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size_t len = SafeGetArrayLength(env, byte_array);
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if (!len)
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return;
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size_t back = out->size();
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out->resize(back + len);
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env->GetByteArrayRegion(byte_array.obj(), 0, len,
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reinterpret_cast<int8_t*>(out->data() + back));
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}
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void JavaByteArrayToByteVector(JNIEnv* env,
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const JavaRef<jbyteArray>& byte_array,
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std::vector<uint8_t>* out) {
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DCHECK(out);
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DCHECK(byte_array);
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out->clear();
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AppendJavaByteArrayToByteVector(env, byte_array, out);
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}
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void JavaByteArrayToString(JNIEnv* env,
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const JavaRef<jbyteArray>& byte_array,
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std::string* out) {
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DCHECK(out);
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DCHECK(byte_array);
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std::vector<uint8_t> byte_vector;
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JavaByteArrayToByteVector(env, byte_array, &byte_vector);
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out->assign(byte_vector.begin(), byte_vector.end());
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}
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void JavaBooleanArrayToBoolVector(JNIEnv* env,
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const JavaRef<jbooleanArray>& boolean_array,
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std::vector<bool>* out) {
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DCHECK(out);
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if (!boolean_array)
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return;
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size_t len = SafeGetArrayLength(env, boolean_array);
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if (!len)
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return;
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out->resize(len);
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// It is not possible to get bool* out of vector<bool>.
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jboolean* values = env->GetBooleanArrayElements(boolean_array.obj(), nullptr);
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for (size_t i = 0; i < len; ++i) {
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out->at(i) = static_cast<bool>(values[i]);
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}
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env->ReleaseBooleanArrayElements(boolean_array.obj(), values, JNI_ABORT);
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}
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void JavaIntArrayToIntVector(JNIEnv* env,
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const JavaRef<jintArray>& int_array,
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std::vector<int>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, int_array);
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out->resize(len);
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if (!len)
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return;
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env->GetIntArrayRegion(int_array.obj(), 0, len, out->data());
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}
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void JavaLongArrayToInt64Vector(JNIEnv* env,
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const JavaRef<jlongArray>& long_array,
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std::vector<int64_t>* out) {
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DCHECK(out);
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std::vector<jlong> temp;
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JavaLongArrayToLongVector(env, long_array, &temp);
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out->resize(0);
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out->insert(out->begin(), temp.begin(), temp.end());
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}
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void JavaLongArrayToLongVector(JNIEnv* env,
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const JavaRef<jlongArray>& long_array,
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std::vector<jlong>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, long_array);
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out->resize(len);
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if (!len)
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return;
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env->GetLongArrayRegion(long_array.obj(), 0, len, out->data());
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}
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void JavaFloatArrayToFloatVector(JNIEnv* env,
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const JavaRef<jfloatArray>& float_array,
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std::vector<float>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, float_array);
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out->resize(len);
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if (!len)
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return;
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env->GetFloatArrayRegion(float_array.obj(), 0, len, out->data());
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}
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void JavaArrayOfByteArrayToStringVector(JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<std::string>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, array);
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out->resize(len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jbyteArray> bytes_array(
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env,
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static_cast<jbyteArray>(env->GetObjectArrayElement(array.obj(), i)));
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jsize bytes_len = env->GetArrayLength(bytes_array.obj());
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jbyte* bytes = env->GetByteArrayElements(bytes_array.obj(), nullptr);
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(*out)[i].assign(reinterpret_cast<const char*>(bytes), bytes_len);
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env->ReleaseByteArrayElements(bytes_array.obj(), bytes, JNI_ABORT);
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}
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}
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void JavaArrayOfByteArrayToBytesVector(JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<std::vector<uint8_t>>* out) {
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DCHECK(out);
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const size_t len = SafeGetArrayLength(env, array);
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out->resize(len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jbyteArray> bytes_array(
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env,
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static_cast<jbyteArray>(env->GetObjectArrayElement(array.obj(), i)));
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JavaByteArrayToByteVector(env, bytes_array, &(*out)[i]);
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}
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}
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void Java2dStringArrayTo2dStringVector(
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JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<std::vector<string16>>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, array);
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out->resize(len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jobjectArray> strings_array(
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env,
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static_cast<jobjectArray>(env->GetObjectArrayElement(array.obj(), i)));
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out->at(i).clear();
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AppendJavaStringArrayToStringVector(env, strings_array, &out->at(i));
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}
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}
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void JavaArrayOfIntArrayToIntVector(JNIEnv* env,
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const JavaRef<jobjectArray>& array,
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std::vector<std::vector<int>>* out) {
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DCHECK(out);
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size_t len = SafeGetArrayLength(env, array);
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out->resize(len);
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for (size_t i = 0; i < len; ++i) {
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ScopedJavaLocalRef<jintArray> int_array(
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env,
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static_cast<jintArray>(env->GetObjectArrayElement(array.obj(), i)));
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JavaIntArrayToIntVector(env, int_array, &out->at(i));
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}
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}
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} // namespace android
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} // namespace base
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