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