Lib.c File Reference

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

Include dependency graph for Lib.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
VOID	FltpFreeUnicodeString (_In_ PUNICODE_STRING String)
NTSTATUS	FltpReallocateUnicodeString (_In_ PUNICODE_STRING String, _In_ SIZE_T NewLength, _In_ BOOLEAN CopyExisting)
NTSTATUS	FltpCopyUnicodeString (_In_ PUNICODE_STRING StringOne, _In_ PUNICODE_STRING StringTwo)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file Lib.c.

Function Documentation

FltpCopyUnicodeString()

NTSTATUS FltpCopyUnicodeString	(	_In_ PUNICODE_STRING	StringOne,
		_In_ PUNICODE_STRING	StringTwo
	)

Definition at line 79 of file Lib.c.

{
    return 0;
}

FltpFreeUnicodeString()

VOID FltpFreeUnicodeString

(

_In_ PUNICODE_STRING

String

)

Definition at line 24 of file Lib.c.

{
    /* Free up any existing buffer */
    if (String->Buffer)
    {
        ExFreePoolWithTag(String->Buffer, FM_TAG_UNICODE_STRING);
    }
 
    /* Empty the string */
    String->Buffer = NULL;
    String->Length = 0;
    String->MaximumLength = 0;
}

Referenced by FltpEnumerateFileSystemVolumes(), and FltpFsNotification().

FltpReallocateUnicodeString()

NTSTATUS FltpReallocateUnicodeString	(	_In_ PUNICODE_STRING	String,
		_In_ SIZE_T	NewLength,
		_In_ BOOLEAN	CopyExisting
	)

Definition at line 39 of file Lib.c.

{
    PWCH NewBuffer;
 
    /* Don't bother reallocating if the buffer is smaller */
    if (NewLength <= String->MaximumLength)
    {
        String->Length = 0;
        return STATUS_SUCCESS;
    }
 
    /* Allocate a new buffer at the size requested */
    NewBuffer = ExAllocatePoolWithTag(PagedPool, NewLength, FM_TAG_UNICODE_STRING);
    if (NewBuffer == NULL) return STATUS_INSUFFICIENT_RESOURCES;
 
    if (CopyExisting)
    {
        /* Copy the old data across */
        RtlCopyMemory(NewBuffer, String->Buffer, String->Length);
    }
    else
    {
        /* Reset the length */
        String->Length = 0;
    }
 
    /* Free any old buffer */
    if (String->Buffer)
        ExFreePoolWithTag(String->Buffer, FM_TAG_UNICODE_STRING);
 
    /* Update the lengths */
    String->Buffer = NewBuffer;
    String->MaximumLength = NewLength;
 
    return STATUS_SUCCESS;
}

Referenced by FltpGetObjectName().