Add the supportedvpdpages example

Author: ljdelight

examples/supportedvpdpages/dub.json

@@ -0,0 +1,10 @@
+{
+    "name": "supportedvpdpages",
+    "description": "Getting the supported VPD pages",
+    "copyright": "Copyright © 2015, Lucas Burson",
+    "authors": ["Lucas Burson"],
+    "dependencies": {
+        "sgio-d": {"version": "~master", "path": "../../"}
+    },
+    "targetType": "executable"
+}

examples/supportedvpdpages/source/app.d

@@ -0,0 +1,65 @@
+import std.stdio : writeln;
+
+import sgio.inquiry.inquiry;
+import sgio.SCSIDevice;
+import sgio.utility;
+import sgio.exceptions;
+import sgio.SCSICommand;
+
+int main(string[] args)
+{
+   if (args.length <= 1)
+   {
+      writeln("app <device>");
+      return 1;
+   }
+
+   auto deviceName = args[1];
+
+   // TODO: this should be generalized somehow. nasty os-specific.
+   version (Windows)
+   {
+      wchar* thefile = std.utf.toUTFz!(wchar*)(deviceName);
+      auto file = CreateFileW(thefile,
+                       GENERIC_WRITE|GENERIC_READ,
+                       FILE_SHARE_WRITE|FILE_SHARE_READ,
+                       null, OPEN_EXISTING,
+                       FILE_ATTRIBUTE_NORMAL, null);
+
+      if (file == INVALID_HANDLE_VALUE)
+      {
+         writeln("failed to open device");
+         return 1;
+      }
+      auto dev = new SCSIDeviceBS(cast(uint)(file));
+   }
+   version (Posix)
+   {
+      auto file = File(deviceName, "rb");
+      auto dev = new SCSIDeviceBS(file.fileno());
+   }
+
+   try
+   {
+      auto vpdpages = new SupportedVPDPagesInquiry(dev);
+      writeln("Here are the suppored VPD pages for " ~ deviceName);
+      writeln(writeBuffer(vpdpages.supported_pages, vpdpages.supported_pages.length));
+   }
+   catch (SCSIException err)
+   {
+      writeln("SCSIException... Message: ", err.msg);
+      return 1;
+   }
+   finally
+   {
+       version (Posix)
+       {
+          file.close();
+       }
+       version (Windows)
+       {
+          CloseHandle(file);
+       }
+    }
+   return 0;
+}