Build a library with the C++ part of environment setup

[sigrok-androidutils.git] / lib / envsetup.cpp

diff --git a/lib/envsetup.cpp b/lib/envsetup.cpp
new file mode 100644 (file)
index 0000000..373d8e3
--- /dev/null
+++ b/lib/envsetup.cpp
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the sigrok 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 "libsigrokandroidutils.h"
+#include "libsigrokandroidutils-internal.h"
+
+SRAU_API void srau_init_environment(void)
+{
+       JNIEnv* env;
+
+       int attach_mode = srau_get_java_env(&env);
+
+       if (attach_mode < 0)
+               return;
+
+       jclass envc = srau_get_environment_class(env);
+       if (!envc)
+               return;
+
+       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);
+
+       srau_unget_java_env(attach_mode);
+}