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 #include <nativehelper/toStringArray.h> 18 19 #include "JniConstants.h" 20 21 namespace { 22 23 struct ArrayCounter { 24 const char* const* strings; 25 explicit ArrayCounter(const char* const* strings) : strings(strings) {} 26 size_t operator()() { 27 size_t count = 0; 28 while (strings[count] != nullptr) { 29 ++count; 30 } 31 return count; 32 } 33 }; 34 35 struct ArrayGetter { 36 const char* const* strings; 37 explicit ArrayGetter(const char* const* strings) : strings(strings) {} 38 const char* operator()(size_t i) { 39 return strings[i]; 40 } 41 }; 42 43 } // namespace 44 45 jobjectArray newStringArray(JNIEnv* env, size_t count) { 46 return env->NewObjectArray(count, JniConstants::GetStringClass(env), nullptr); 47 } 48 49 jobjectArray toStringArray(JNIEnv* env, const char* const* strings) { 50 ArrayCounter counter(strings); 51 ArrayGetter getter(strings); 52 return toStringArray(env, &counter, &getter); 53 } 54