Initial submit of ChromeDebug extension

tools/win/ChromeDebug/ChromeDebug/Utility.cs

Index: tools/win/ChromeDebug/ChromeDebug/Utility.cs
diff --git a/tools/win/ChromeDebug/ChromeDebug/Utility.cs b/tools/win/ChromeDebug/ChromeDebug/Utility.cs
new file mode 100644
index 0000000000000000000000000000000000000000..db74684ece52843b69844c3c626b3ad7d93f44ac
--- /dev/null
+++ b/tools/win/ChromeDebug/ChromeDebug/Utility.cs
@@ -0,0 +1,85 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+using ChromeDebug.LowLevel;
+
+namespace ChromeDebug {
+  internal static class Utility {
+    public static string[] SplitArgs(string unsplitArgumentLine) {
+      if (unsplitArgumentLine == null)
+        return new string[0];
+
+      int numberOfArgs;
+      IntPtr ptrToSplitArgs;
+      string[] splitArgs;
+
+      ptrToSplitArgs = NativeMethods.CommandLineToArgvW(unsplitArgumentLine, out numberOfArgs);
+
+      // CommandLineToArgvW returns NULL upon failure.
+      if (ptrToSplitArgs == IntPtr.Zero)
+        throw new ArgumentException("Unable to split argument.", new Win32Exception());
+
+      // Make sure the memory ptrToSplitArgs to is freed, even upon failure.
+      try {
+        splitArgs = new string[numberOfArgs];
+
+        // ptrToSplitArgs is an array of pointers to null terminated Unicode strings.
+        // Copy each of these strings into our split argument array.
+        for (int i = 0; i < numberOfArgs; i++)
+          splitArgs[i] = Marshal.PtrToStringUni(
+              Marshal.ReadIntPtr(ptrToSplitArgs, i * IntPtr.Size));
+
+        return splitArgs;
+      }
+      finally {
+        // Free memory obtained by CommandLineToArgW.
+        NativeMethods.LocalFree(ptrToSplitArgs);
+      }
+    }
+
+    public static T ReadUnmanagedStructFromProcess<T>(IntPtr processHandle,
+                                                      IntPtr addressInProcess) {
+      int bytesRead;
+      int bytesToRead = Marshal.SizeOf(typeof(T));
+      IntPtr buffer = Marshal.AllocHGlobal(bytesToRead);
+      if (!NativeMethods.ReadProcessMemory(processHandle, addressInProcess, buffer, bytesToRead,
+              out bytesRead))
+        throw new Win32Exception();
+      T result = (T)Marshal.PtrToStructure(buffer, typeof(T));
+      Marshal.FreeHGlobal(buffer);
+      return result;
+    }
+
+    public static string ReadStringUniFromProcess(IntPtr processHandle,
+                                                  IntPtr addressInProcess,
+                                                  int NumChars) {
+      int bytesRead;
+      IntPtr outBuffer = Marshal.AllocHGlobal(NumChars * 2);
+
+      bool bresult = NativeMethods.ReadProcessMemory(processHandle,
+                                                     addressInProcess,
+                                                     outBuffer,
+                                                     NumChars * 2,
+                                                     out bytesRead);
+      if (!bresult)
+        throw new Win32Exception();
+
+      string result = Marshal.PtrToStringUni(outBuffer, bytesRead / 2);
+      Marshal.FreeHGlobal(outBuffer);
+      return result;
+    }
+
+    public static int UnmanagedStructSize<T>() {
+      return Marshal.SizeOf(typeof(T));
+    }
+  }
+}