Moved Java to C string conversion function to android_jni header file

src/frontends/android/jni/libandroidbridge/android_jni.h

@@ -81,4 +81,23 @@ static inline bool androidjni_exception_occurred(JNIEnv *env)
 	return FALSE;
 }
 
+/**
+ * Convert a Java string to a C string.  Memory is allocated.
+ *
+ * @param env		JNIEnv
+ * @param jstr		Java string
+ * @return			native C string (allocated)
+ */
+static inline char *androidjni_convert_jstring(JNIEnv *env, jstring jstr)
+{
+	char *str;
+	jsize len;
+
+	len = (*env)->GetStringUTFLength(env, jstr);
+	str = malloc(len + 1);
+	(*env)->GetStringUTFRegion(env, jstr, 0, len, str);
+	str[len] = '\0';
+	return str;
+}
+
 #endif /** ANDROID_JNI_H_ @}*/

src/frontends/android/jni/libandroidbridge/charonservice.c

@@ -438,21 +438,6 @@ JNI_METHOD(CharonVpnService, deinitializeCharon, void)
 	library_deinit();
 }
 
-/**
- * Convert a Java string to a C string.  Memory is allocated.
- */
-static inline char *convert_jstring(JNIEnv *env, jstring jstr)
-{
-	char *str;
-	jsize len;
-
-	len = (*env)->GetStringUTFLength(env, jstr);
-	str = malloc(len + 1);
-	(*env)->GetStringUTFRegion(env, jstr, 0, len, str);
-	str[len] = '\0';
-	return str;
-}
-
 /**
  * Initiate SA
  */
@@ -462,10 +447,10 @@ JNI_METHOD(CharonVpnService, initiate, void,
 {
 	char *local_address, *gateway, *username, *password;
 
-	local_address = convert_jstring(env, jlocal_address);
-	gateway = convert_jstring(env, jgateway);
-	username = convert_jstring(env, jusername);
-	password = convert_jstring(env, jpassword);
+	local_address = androidjni_convert_jstring(env, jlocal_address);
+	gateway = androidjni_convert_jstring(env, jgateway);
+	username = androidjni_convert_jstring(env, jusername);
+	password = androidjni_convert_jstring(env, jpassword);
 
 	initiate(local_address, gateway, username, password);
 }