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// This example uses the ACE_Registry class to iterator through the
// entries in the predefined registries. The host of iteration can be
// varied through argv[1]. If no host is specified the local host is
// used. This is very similar to how regedt32 starts up.
//
// This examples points the cool iterators in ACE_Registry
#include "ace/Registry.h"
// Indentation while printing names
static const u_long INDENTATION_LEVEL = 3;
// Prototypes
static int print_naming_context (ACE_Registry::Naming_Context &naming_context,
u_long indentation);
static void print_object (const ACE_Registry::Istring &name,
u_long indentation);
static void print_context (ACE_Registry::Naming_Context &parent,
const ACE_Registry::Istring &name,
u_long indentation);
static void indent (u_long indentation);
int
main (int argc, char *argv[])
{
int result;
ACE_Registry::Naming_Context naming_context;
LPCTSTR host = 0;
if (argc == 2)
host = ACE_WIDE_STRING (argv[1]);
// Connect to a predefined naming context
result = ACE_Predefined_Naming_Contexts::connect (naming_context,
HKEY_LOCAL_MACHINE,
// HKEY_CLASSES_ROOT,
// HKEY_USERS,
// HKEY_CURRENT_USER,
host);
if (result != 0)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "ACE_Predefined_Naming_Contexts::connect failed"), -1);
// Print contents of naming context
result = ::print_naming_context (naming_context, 0);
if (result != 0)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "print_naming_context failed"), -1);
return 0;
}
// Print contents of <naming_context>
static int
print_naming_context (ACE_Registry::Naming_Context &naming_context,
u_long indentation)
{
ACE_Registry::Binding_List list;
// Get the list of all entries
int result = naming_context.list (list);
if (result != 0)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "ACE_Registry::Naming_Context::list"), -1);
// Iterator through all entries
for (ACE_Registry::Binding_List::iterator i = list.begin ();
i != list.end ();
i++)
{
// Yeeesss! STL rules!
ACE_Registry::Binding &binding = *i;
if (binding.type () == ACE_Registry::OBJECT)
// If object
::print_object (binding.name (),
indentation);
else
// If context
::print_context (naming_context,
binding.name (),
indentation);
}
return 0;
}
// Print an object with <name>
static void
print_object (const ACE_Registry::Istring &name,
u_long indentation)
{
// Set indentation
::indent (indentation);
cout << name << endl;
}
// Print an context with <name> and <parent>
static void
print_context (ACE_Registry::Naming_Context &parent,
const ACE_Registry::Istring &name,
u_long indentation)
{
// Set indentation
indent (indentation);
cout << name << endl;
ACE_Registry::Naming_Context child_context;
// Find child context
int result = parent.resolve_context (name,
child_context,
KEY_READ);
if (result != 0)
ACE_ERROR ((LM_ERROR, "%s %s\n", "ACE_Registry::Naming_Context::resolve_context failed for:", name.c_str ()));
else
{
// Print contents of the child
result = ::print_naming_context (child_context,
indentation + INDENTATION_LEVEL);
if (result != 0)
ACE_ERROR ((LM_ERROR, "%p\n", "print_naming_context failed"));
}
}
// Pretty formating
static void
indent (u_long indentation)
{
for (; indentation > 0; indentation--)
cout << " ";
}
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