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server: Add a helper function for the common functionality between open_key and create_key.

This commit is contained in:
Alexandre Julliard 2010-03-04 20:46:42 +01:00
parent b6f2919b90
commit 606cc06148
1 changed files with 32 additions and 36 deletions
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68
server/registry.c
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@ -643,6 +643,31 @@ static struct key *follow_symlink( struct key *key, int iteration )
return key;
}
/* open a key until we find an element that doesn't exist */
/* helper for open_key and create_key */
static struct key *open_key_prefix( struct key *key, const struct unicode_str *name,
unsigned int access, struct unicode_str *token, int *index )
{
token->str = NULL;
if (!get_path_token( name, token )) return NULL;
if (access & KEY_WOW64_32KEY) key = find_wow64_subkey( key, token );
while (token->len)
{
struct key *subkey;
if (!(subkey = find_subkey( key, token, index ))) break;
key = subkey;
get_path_token( name, token );
if (!token->len) break;
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, token );
if (!(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
}
return key;
}
/* open a subkey */
static struct key *open_key( struct key *key, const struct unicode_str *name, unsigned int access,
unsigned int attributes )
@ -650,26 +675,13 @@ static struct key *open_key( struct key *key, const struct unicode_str *name, un
int index;
struct unicode_str token;
token.str = NULL;
if (!get_path_token( name, &token )) return NULL;
if (access & KEY_WOW64_32KEY) key = find_wow64_subkey( key, &token );
while (token.len)
{
if (!(key = find_subkey( key, &token, &index )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
get_path_token( name, &token );
if (!token.len) break;
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, &token );
if (!(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
}
if (!(key = open_key_prefix( key, name, access, &token, &index ))) return NULL;
if (token.len)
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, &token );
if (!(attributes & OBJ_OPENLINK) && !(key = follow_symlink( key, 0 )))
{
@ -695,24 +707,8 @@ static struct key *create_key( struct key *key, const struct unicode_str *name,
return NULL;
}
token.str = NULL;
if (!get_path_token( name, &token )) return NULL;
*created = 0;
if (access & KEY_WOW64_32KEY) key = find_wow64_subkey( key, &token );
while (token.len)
{
struct key *subkey;
if (!(subkey = find_subkey( key, &token, &index ))) break;
key = subkey;
get_path_token( name, &token );
if (!token.len) break;
if (!(access & KEY_WOW64_64KEY)) key = find_wow64_subkey( key, &token );
if (!(key = follow_symlink( key, 0 )))
{
set_error( STATUS_OBJECT_NAME_NOT_FOUND );
return NULL;
}
}
if (!(key = open_key_prefix( key, name, access, &token, &index ))) return NULL;
if (!token.len) /* the key already exists */
{