upload android base code part6

android/libnativehelper/toStringArray.cpp

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#include "JniConstants.h"
+#include "toStringArray.h"
+
+jobjectArray newStringArray(JNIEnv* env, size_t count) {
+    return env->NewObjectArray(count, JniConstants::stringClass, NULL);
+}
+
+struct ArrayCounter {
+    const char* const* strings;
+    explicit ArrayCounter(const char* const* strings) : strings(strings) {}
+    size_t operator()() {
+        size_t count = 0;
+        while (strings[count] != NULL) {
+            ++count;
+        }
+        return count;
+    }
+};
+
+struct ArrayGetter {
+    const char* const* strings;
+    explicit ArrayGetter(const char* const* strings) : strings(strings) {}
+    const char* operator()(size_t i) {
+        return strings[i];
+    }
+};
+
+jobjectArray toStringArray(JNIEnv* env, const char* const* strings) {
+    ArrayCounter counter(strings);
+    ArrayGetter getter(strings);
+    return toStringArray(env, &counter, &getter);
+}