1/*
2 * Copyright (C) 2011 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 "ExecStrings"
18
19#include "ExecStrings.h"
20
21#include <stdlib.h>
22
23#include "cutils/log.h"
24#include "ScopedLocalRef.h"
25
26ExecStrings::ExecStrings(JNIEnv* env, jobjectArray java_string_array)
27    : env_(env), java_array_(java_string_array), array_(NULL) {
28  if (java_array_ == NULL) {
29    return;
30  }
31
32  jsize length = env_->GetArrayLength(java_array_);
33  array_ = new char*[length + 1];
34  array_[length] = NULL;
35  for (jsize i = 0; i < length; ++i) {
36    ScopedLocalRef<jstring> java_string(env_, reinterpret_cast<jstring>(env_->GetObjectArrayElement(java_array_, i)));
37    // We need to pass these strings to const-unfriendly code.
38    char* string = const_cast<char*>(env_->GetStringUTFChars(java_string.get(), NULL));
39    array_[i] = string;
40  }
41}
42
43ExecStrings::~ExecStrings() {
44  if (array_ == NULL) {
45    return;
46  }
47
48  // Temporarily clear any pending exception so we can clean up.
49  jthrowable pending_exception = env_->ExceptionOccurred();
50  if (pending_exception != NULL) {
51    env_->ExceptionClear();
52  }
53
54  jsize length = env_->GetArrayLength(java_array_);
55  for (jsize i = 0; i < length; ++i) {
56    ScopedLocalRef<jstring> java_string(env_, reinterpret_cast<jstring>(env_->GetObjectArrayElement(java_array_, i)));
57    env_->ReleaseStringUTFChars(java_string.get(), array_[i]);
58  }
59  delete[] array_;
60
61  // Re-throw any pending exception.
62  if (pending_exception != NULL) {
63    if (env_->Throw(pending_exception) < 0) {
64      ALOGE("Error rethrowing exception!");
65    }
66  }
67}
68
69char** ExecStrings::get() {
70  return array_;
71}
72