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/*
* Copyright (c) 2016 Google, Inc.
*
* 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.
*
* Relicensed from the WTFPL (http://www.wtfpl.net/faq/).
*/
#include "android_util.h"
#include <android_native_app_glue.h>
#include <cassert>
#include <vector>
#include <string>
#include <sstream>
extern "C" {
// Convert Intents to arg list, returning argc and argv
// Note that this C routine mallocs memory that the caller must free
char** get_args(struct android_app* app, const char* intent_extra_data_key, const char* appTag, int* count)
{
std::vector<std::string> args;
JavaVM &vm = *app->activity->vm;
JNIEnv *p_env;
if (vm.AttachCurrentThread(&p_env, nullptr) != JNI_OK)
return nullptr;
JNIEnv &env = *p_env;
jobject activity = app->activity->clazz;
jmethodID get_intent_method = env.GetMethodID(env.GetObjectClass(activity),
"getIntent", "()Landroid/content/Intent;");
jobject intent = env.CallObjectMethod(activity, get_intent_method);
jmethodID get_string_extra_method = env.GetMethodID(env.GetObjectClass(intent),
"getStringExtra", "(Ljava/lang/String;)Ljava/lang/String;");
jvalue get_string_extra_args;
get_string_extra_args.l = env.NewStringUTF(intent_extra_data_key);
jstring extra_str = static_cast<jstring>(env.CallObjectMethodA(intent,
get_string_extra_method, &get_string_extra_args));
std::string args_str;
if (extra_str) {
const char *extra_utf = env.GetStringUTFChars(extra_str, nullptr);
args_str = extra_utf;
env.ReleaseStringUTFChars(extra_str, extra_utf);
env.DeleteLocalRef(extra_str);
}
env.DeleteLocalRef(get_string_extra_args.l);
env.DeleteLocalRef(intent);
vm.DetachCurrentThread();
// split args_str
std::stringstream ss(args_str);
std::string arg;
while (std::getline(ss, arg, ' ')) {
if (!arg.empty())
args.push_back(arg);
}
// Convert our STL results to C friendly constructs
assert(count != nullptr);
*count = args.size() + 1;
char** vector = (char**) malloc(*count * sizeof(char*));
const char* appName = appTag ? appTag : (const char*) "appTag";
vector[0] = (char*) malloc(strlen(appName) * sizeof(char));
strcpy(vector[0], appName);
for (uint32_t i = 0; i < args.size(); i++) {
vector[i + 1] = (char*) malloc(strlen(args[i].c_str()) * sizeof(char));
strcpy(vector[i + 1], args[i].c_str());
}
return vector;
}
} // extern "C"
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