cromo: Add ExtractUint32 function

utilities.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Utilities for plugins for the cromo modem manager.
 
 #ifndef CROMO_UTILITIES_H_
 #define CROMO_UTILITIES_H_
 
 #include <base/basictypes.h>
@@ skipping 10 matching lines @@
 // Extracts the key from proprties, returning not_found_response if
 // the key is not found.  If key is found, but is not a string, sets
 // error and returns not_found_response.  If error.is_set() is true,
 // ExtractString will not report further errors.  You can make
 // multiple ExtractString calls and check error at the end.
 const char *ExtractString(const DBusPropertyMap properties,
                           const char *key,
                           const char *not_found_response,
                           DBus::Error &error);
 
+// Extracts the key from proprties, returning not_found_response if
+// the key is not found.  If key is found, but is not a Uint32, sets
+// error and returns not_found_response.  If error.is_set() is true,
+// ExtractUint32 will not report further errors.  You can make
+// multiple ExtractUint32 calls and check error at the end.
+uint32_t ExtractUint32(const DBusPropertyMap properties,
+                       const char *key,
+                       uint32_t not_found_response,
+                       DBus::Error &error);
+
+
 // Convert a string representing a hex ESN to one representing a
 // decimal ESN.  Returns success.
 bool HexEsnToDecimal(const std::string &esn_hex, std::string *out);
 
 }  // namespace utilities
 
 #endif  /* CROMO_UTILITIES_H_ */