cmname.c File Reference

#include "cmlib.h"
#include <debug.h>

Include dependency graph for cmname.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
USHORT NTAPI	CmpCopyName (IN PHHIVE Hive, OUT PWCHAR Destination, IN PCUNICODE_STRING Source)
VOID NTAPI	CmpCopyCompressedName (OUT PWCHAR Destination, IN ULONG DestinationLength, IN PWCHAR Source, IN ULONG SourceLength)
USHORT NTAPI	CmpNameSize (IN PHHIVE Hive, IN PCUNICODE_STRING Name)
USHORT NTAPI	CmpCompressedNameSize (IN PWCHAR Name, IN ULONG Length)
LONG NTAPI	CmpCompareCompressedName (IN PCUNICODE_STRING SearchName, IN PWCHAR CompressedName, IN ULONG NameLength)
BOOLEAN NTAPI	CmpFindNameInList (IN PHHIVE Hive, IN PCHILD_LIST ChildList, IN PCUNICODE_STRING Name, OUT PULONG ChildIndex OPTIONAL, OUT PHCELL_INDEX CellIndex)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file cmname.c.

Function Documentation

CmpCompareCompressedName()

LONG NTAPI CmpCompareCompressedName	(	IN PCUNICODE_STRING	SearchName,
		IN PWCHAR	CompressedName,
		IN ULONG	NameLength
	)

Definition at line 109 of file cmname.c.

{
    WCHAR* p;
    UCHAR* pp;
    WCHAR chr1, chr2;
    USHORT SearchLength;
    LONG Result;
 
    /* Set the pointers and length and then loop */
    p = SearchName->Buffer;
    pp = (PUCHAR)CompressedName;
    SearchLength = (SearchName->Length / sizeof(WCHAR));
    while (SearchLength > 0 && NameLength > 0)
    {
        /* Get the characters */
        chr1 = *p++;
        chr2 = (WCHAR)(*pp++);
 
        /* Check if we have a direct match */
        if (chr1 != chr2)
        {
            /* See if they match and return result if they don't */
            Result = (LONG)RtlUpcaseUnicodeChar(chr1) -
                     (LONG)RtlUpcaseUnicodeChar(chr2);
            if (Result) return Result;
        }
 
        /* Next chars */
        SearchLength--;
        NameLength--;
    }
 
    /* Return the difference directly */
    return SearchLength - NameLength;
}

Referenced by CmpCompareSubkeys(), CmpDoCompareKeyName(), CmpFindNameInList(), CmpFindValueByNameFromCache(), CmpGetNameControlBlock(), and CmpValidateLexicalOrder().

CmpCompressedNameSize()

USHORT NTAPI CmpCompressedNameSize	(	IN PWCHAR	Name,
		IN ULONG	Length
	)

Definition at line 95 of file cmname.c.

{
    /*
     * Don't remove this: compressed names are "opaque" and just because
     * the current implementation turns them into ansi-names doesn't mean
     * that it will remain that way forever, so -never- assume this code
     * below internally!
     */
    return (USHORT)Length * sizeof(WCHAR);
}

Referenced by BiEnumerateSubKeys(), CmpAddDriverToList(), CmpAddSubKey(), CmpConstructName(), CmpGetHiveName(), CmpIsSafe(), CmpMarkIndexDirty(), CmpQueryKeyData(), CmpQueryKeyDataFromCache(), CmpQueryKeyValueData(), CmpQueryNameInformation(), and CmpRemoveSubKey().

CmpCopyCompressedName()

VOID NTAPI CmpCopyCompressedName	(	OUT PWCHAR	Destination,
		IN ULONG	DestinationLength,
		IN PWCHAR	Source,
		IN ULONG	SourceLength
	)

Definition at line 56 of file cmname.c.

{
    ULONG i, Length;
 
    /* Get the actual length to copy */
    Length = min(DestinationLength / sizeof(WCHAR), SourceLength);
    for (i = 0; i < Length; i++)
    {
        /* Copy each character */
        Destination[i] = (WCHAR)((PUCHAR)Source)[i];
    }
}

Referenced by BiEnumerateSubKeys(), CmpAddDriverToList(), CmpAddSubKey(), CmpGetHiveName(), CmpIsSafe(), CmpMarkIndexDirty(), CmpQueryKeyData(), CmpQueryKeyValueData(), CmpQueryNameInformation(), and CmpRemoveSubKey().

CmpCopyName()

USHORT NTAPI CmpCopyName	(	IN PHHIVE	Hive,
		OUT PWCHAR	Destination,
		IN PCUNICODE_STRING	Source
	)

Definition at line 21 of file cmname.c.

{
    ULONG i;
 
    /* Check for old hives */
    if (Hive->Version == 1)
    {
        /* Just copy the source directly */
        RtlCopyMemory(Destination, Source->Buffer, Source->Length);
        return Source->Length;
    }
 
    /* For new versions, check for compressed name */
    for (i = 0; i < (Source->Length / sizeof(WCHAR)); i++)
    {
        /* Check if the name is non compressed */
        if (Source->Buffer[i] > (UCHAR)-1)
        {
            /* Do the copy */
            RtlCopyMemory(Destination, Source->Buffer, Source->Length);
            return Source->Length;
        }
 
        /* Copy this character */
        ((PCHAR)Destination)[i] = (CHAR)(Source->Buffer[i]);
    }
 
    /* Compressed name, return length */
    return Source->Length / sizeof(WCHAR);
}

Referenced by CmCreateRootNode(), CmiAddValueKey(), CmiCreateSubKey(), CmpCreateLinkNode(), CmpCreateRootNode(), CmpDoCreateChild(), and CmpSetValueKeyNew().

CmpFindNameInList()

BOOLEAN NTAPI CmpFindNameInList	(	IN PHHIVE	Hive,
		IN PCHILD_LIST	ChildList,
		IN PCUNICODE_STRING	Name,
		OUT PULONG ChildIndex	OPTIONAL,
		OUT PHCELL_INDEX	CellIndex
	)

Definition at line 149 of file cmname.c.

{
    PCELL_DATA CellData;
    HCELL_INDEX CellToRelease = HCELL_NIL;
    ULONG i;
    PCM_KEY_VALUE KeyValue;
    LONG Result;
    UNICODE_STRING SearchName;
    BOOLEAN Success;
 
    /* Make sure there's actually something on the list */
    if (ChildList->Count != 0)
    {
        /* Get the cell data */
        CellData = (PCELL_DATA)HvGetCell(Hive, ChildList->List);
        if (!CellData)
        {
            /* Couldn't get the cell... tell the caller */
            *CellIndex = HCELL_NIL;
            return FALSE;
        }
 
        /* Now loop every entry */
        for (i = 0; i < ChildList->Count; i++)
        {
            /* Check if we have a cell to release */
            if (CellToRelease != HCELL_NIL)
            {
                /* Release it */
                HvReleaseCell(Hive, CellToRelease);
                CellToRelease = HCELL_NIL;
            }
 
            /* Get this value */
            KeyValue = (PCM_KEY_VALUE)HvGetCell(Hive, CellData->u.KeyList[i]);
            if (!KeyValue)
            {
                /* Return with no data found */
                *CellIndex = HCELL_NIL;
                Success = FALSE;
                goto Return;
            }
 
            /* Save the cell to release */
            CellToRelease = CellData->u.KeyList[i];
 
            /* Check if it's a compressed value name */
            if (KeyValue->Flags & VALUE_COMP_NAME)
            {
                /* Compare compressed names */
                Result = CmpCompareCompressedName(Name,
                                                  KeyValue->Name,
                                                  KeyValue->NameLength);
            }
            else
            {
                /* Compare the Unicode name directly */
                SearchName.Length = KeyValue->NameLength;
                SearchName.MaximumLength = SearchName.Length;
                SearchName.Buffer = KeyValue->Name;
                Result = RtlCompareUnicodeString(Name, &SearchName, TRUE);
            }
 
            /* Check if we found it */
            if (!Result)
            {
                /* We did... return info to caller */
                if (ChildIndex) *ChildIndex = i;
                *CellIndex = CellData->u.KeyList[i];
 
                /* Set success state */
                Success = TRUE;
                goto Return;
            }
        }
 
        /* Got to the end of the list */
        if (ChildIndex) *ChildIndex = i;
        *CellIndex = HCELL_NIL;
 
        /* Nothing found if we got here */
        Success = TRUE;
        goto Return;
    }
 
    /* Nothing found... check if the caller wanted more info */
    ASSERT(ChildList->Count == 0);
    if (ChildIndex) *ChildIndex = 0;
    *CellIndex = HCELL_NIL;
 
    /* Nothing found if we got here */
    return TRUE;
 
Return:
    /* Release the first cell we got */
    if (CellData) HvReleaseCell(Hive, ChildList->List);
 
    /* Release the secondary one, if we have one */
    if (CellToRelease) HvReleaseCell(Hive, CellToRelease);
    return Success;
}

Referenced by BiGetRegistryValue(), CmDeleteValueKey(), CmpFindValueByName(), CmSetValueKey(), RegDeleteValueW(), and RegSetValueExW().

CmpNameSize()

USHORT NTAPI CmpNameSize	(	IN PHHIVE	Hive,
		IN PCUNICODE_STRING	Name
	)

Definition at line 74 of file cmname.c.

{
    ULONG i;
 
    /* For old hives, just return the length */
    if (Hive->Version == 1) return Name->Length;
 
    /* For new versions, check for compressed name */
    for (i = 0; i < (Name->Length / sizeof(WCHAR)); i++)
    {
        /* Check if the name is non compressed */
        if (Name->Buffer[i] > (UCHAR)-1) return Name->Length;
    }
 
    /* Compressed name, return length */
    return Name->Length / sizeof(WCHAR);
}

Referenced by CmCreateRootNode(), CmiAddValueKey(), CmiCreateSubKey(), CmpCreateLinkNode(), CmpCreateRootNode(), CmpDoCreateChild(), and CmpSetValueKeyNew().