Setup environment for SRD on Android

CMakeLists.txt

@@ -243,6 +243,12 @@ if(ENABLE_DECODE)
 		pv/widgets/decodergroupbox.h
 		pv/widgets/decodermenu.h
 	)
+
+	if(ANDROID)
+		list(APPEND pulseview_SOURCES
+			    android/envsetup.cpp
+		)
+	endif()
 endif()
 
 if(WIN32)

android/envsetup.cpp

@@ -0,0 +1,60 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 Marcus Comstedt <marcus@mc.pp.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <jni.h>
+#include <stdlib.h>
+
+jint JNI_OnLoad(JavaVM *vm, void *reserved)
+{
+	JNIEnv* env;
+
+	(void)reserved;
+
+	if (vm->GetEnv((void **)&env, JNI_VERSION_1_6) != JNI_OK) {
+		return -1;
+	}
+
+	jclass envc = env->FindClass("org/sigrok/androidutils/Environment");
+	jmethodID getEnv =  env->GetStaticMethodID(envc, "getEnvironment",
+						   "()[Ljava/lang/String;");
+	jobjectArray envs =
+		(jobjectArray)env->CallStaticObjectMethod(envc, getEnv);
+	jsize i, envn = env->GetArrayLength(envs);
+	for (i=0; i<envn; i+=2) {
+		jstring key = (jstring)env->GetObjectArrayElement(envs, i);
+		jstring value = (jstring)env->GetObjectArrayElement(envs, i+1);
+		const char *utfkey = env->GetStringUTFChars(key, 0);
+		const char *utfvalue = env->GetStringUTFChars(value, 0);
+		setenv(utfkey, utfvalue, 1);
+		env->ReleaseStringUTFChars(value, utfvalue);
+		env->ReleaseStringUTFChars(key, utfkey);
+		env->DeleteLocalRef(value);
+		env->DeleteLocalRef(key);
+	}
+	env->DeleteLocalRef(envs);
+	env->DeleteLocalRef(envc);
+
+	return JNI_VERSION_1_6;
+}
+
+void JNI_OnUnload(JavaVM *vm, void *reserved)
+{
+	(void)vm;
+	(void)reserved;
+}