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- Finished implementing RtlInsertUnicodePrefix: handle greater and less than insertions.

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svn path=/trunk/; revision=19046
This commit is contained in:
Alex Ionescu 2005-11-07 22:05:46 +00:00
parent de2ccc1c51
commit 9810da1c6a
2 changed files with 62 additions and 19 deletions
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26
reactos/include/ndk/rtlfuncs.h
View file

@ -36,13 +36,29 @@
#define RtlParent(Links) \
(PRTL_SPLAY_LINKS)(Links)->Parent
#define RtlInitializeSplayLinks(Links) \
PRTL_SPLAY_LINKS _SplayLinks; \
_SplayLinks = (PRTL_SPLAY_LINKS)(Links); \
_SplayLinks->Parent = _SplayLinks; \
_SplayLinks->LeftChild = NULL; \
#define RtlInitializeSplayLinks(Links) \
PRTL_SPLAY_LINKS _SplayLinks; \
_SplayLinks = (PRTL_SPLAY_LINKS)(Links); \
_SplayLinks->Parent = _SplayLinks; \
_SplayLinks->LeftChild = NULL; \
_SplayLinks->RightChild = NULL;
#define RtlInsertAsLeftChild(ParentLinks,ChildLinks) \
PRTL_SPLAY_LINKS _SplayParent; \
PRTL_SPLAY_LINKS _SplayChild; \
_SplayParent = (PRTL_SPLAY_LINKS)(ParentLinks); \
_SplayChild = (PRTL_SPLAY_LINKS)(ChildLinks); \
_SplayParent->LeftChild = _SplayChild; \
_SplayChild->Parent = _SplayParent;
#define RtlInsertAsRightChild(ParentLinks,ChildLinks) \
PRTL_SPLAY_LINKS _SplayParent; \
PRTL_SPLAY_LINKS _SplayChild; \
_SplayParent = (PRTL_SPLAY_LINKS)(ParentLinks); \
_SplayChild = (PRTL_SPLAY_LINKS)(ChildLinks); \
_SplayParent->RightChild = _SplayChild; \
_SplayChild->Parent = _SplayParent;
/* PROTOTYPES ****************************************************************/
/*

55
reactos/lib/rtl/unicodeprefix.c
View file

@ -139,7 +139,7 @@ RtlInitializeUnicodePrefix(PUNICODE_PREFIX_TABLE PrefixTable)
}
/*
* @unimplemented
* @implemented
*/
BOOLEAN
NTAPI
@ -147,17 +147,6 @@ RtlInsertUnicodePrefix(PUNICODE_PREFIX_TABLE PrefixTable,
PUNICODE_STRING Prefix,
PUNICODE_PREFIX_TABLE_ENTRY PrefixTableEntry)
{
/*
* implementation notes:
* - get name length (number of names) DONE
* - init splay links DONE
* - find a matching tree DONE
* - if !found, insert a new NTC_ROOT entry and return TRUE; DONE
* - if found, loop tree and compare strings: DONE
* if equal, handle casematch/nomatch DONE
* if greater or lesser equal, then add left/right childs accordingly
* - splay the tree DONE
*/
PUNICODE_PREFIX_TABLE_ENTRY CurrentEntry, PreviousEntry, Entry, NextEntry;
ULONG NameCount;
RTL_GENERIC_COMPARE_RESULTS Result;
@ -237,11 +226,49 @@ RtlInsertUnicodePrefix(PUNICODE_PREFIX_TABLE PrefixTable,
}
else if (Result == GenericGreaterThan)
{
/* TODO: Check out the left child and add us */
/* Check out if we have a left child */
if (RtlLeftChild(&Entry->Links))
{
/* We do, enter it and restart the loop */
SplayLinks = RtlLeftChild(&Entry->Links);
Entry = CONTAINING_RECORD(SplayLinks,
UNICODE_PREFIX_TABLE_ENTRY,
Links);
}
else
{
/* We don't, set this entry as a child */
PrefixTableEntry->NodeTypeCode = PFX_NTC_CHILD;
PrefixTableEntry->NextPrefixTree = NULL;
PrefixTableEntry->CaseMatch = PrefixTableEntry;
/* Insert us into the tree */
RtlInsertAsLeftChild(&Entry->Links, &PrefixTableEntry->Links);
break;
}
}
else
{
/* TODO: Check out the right child and add us */
/* Check out if we have a right child */
if (RtlRightChild(&Entry->Links))
{
/* We do, enter it and restart the loop */
SplayLinks = RtlLeftChild(&Entry->Links);
Entry = CONTAINING_RECORD(SplayLinks,
UNICODE_PREFIX_TABLE_ENTRY,
Links);
}
else
{
/* We don't, set this entry as a child */
PrefixTableEntry->NodeTypeCode = PFX_NTC_CHILD;
PrefixTableEntry->NextPrefixTree = NULL;
PrefixTableEntry->CaseMatch = PrefixTableEntry;
/* Insert us into the tree */
RtlInsertAsRightChild(&Entry->Links, &PrefixTableEntry->Links);
break;
}
}
}