140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
/****************************************************************************
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*
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* SciTech OS Portability Manager Library
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*
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* ========================================================================
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*
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* The contents of this file are subject to the SciTech MGL Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.scitechsoft.com/mgl-license.txt
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
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*
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* The Initial Developer of the Original Code is SciTech Software, Inc.
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* All Rights Reserved.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: 32-bit Windows NT driver
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*
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* Description: C library compatible stdlib.h functions for use within a
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* Windows NT driver.
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*
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****************************************************************************/
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#include "pmapi.h"
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#include "oshdr.h"
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/*------------------------ Main Code Implementation -----------------------*/
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/****************************************************************************
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REMARKS:
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PM_malloc override function for Nucleus drivers loaded in NT drivers's.
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****************************************************************************/
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void * malloc(
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size_t size)
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{
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return PM_mallocShared(size);
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}
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/****************************************************************************
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REMARKS:
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calloc library function for Nucleus drivers loaded in NT drivers's.
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****************************************************************************/
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void * calloc(
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size_t nelem,
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size_t size)
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{
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void *p = PM_mallocShared(nelem * size);
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if (p)
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memset(p,0,nelem * size);
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return p;
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}
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/****************************************************************************
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REMARKS:
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PM_realloc override function for Nucleus drivers loaded in VxD's.
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****************************************************************************/
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void * realloc(
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void *ptr,
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size_t size)
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{
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void *p = PM_mallocShared(size);
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if (p) {
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memcpy(p,ptr,size);
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PM_freeShared(ptr);
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}
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return p;
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}
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/****************************************************************************
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REMARKS:
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PM_free override function for Nucleus drivers loaded in VxD's.
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****************************************************************************/
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void free(
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void *p)
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{
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PM_freeShared(p);
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}
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/****************************************************************************
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PARAMETERS:
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cstr - C style ANSI string to convert
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RETURNS:
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Pointer to the UniCode string structure or NULL on failure to allocate memory
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REMARKS:
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Converts a C style string to a UniCode string structure that can be passed
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directly to NT kernel functions.
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****************************************************************************/
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UNICODE_STRING *_PM_CStringToUnicodeString(
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const char *cstr)
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{
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int length;
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ANSI_STRING ansiStr;
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UNICODE_STRING *uniStr;
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/* Allocate memory for the string structure */
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if ((uniStr = ExAllocatePool(NonPagedPool, sizeof(UNICODE_STRING))) == NULL)
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return NULL;
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/* Allocate memory for the wide string itself */
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length = (strlen(cstr) * sizeof(WCHAR)) + sizeof(WCHAR);
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if ((uniStr->Buffer = ExAllocatePool(NonPagedPool, length)) == NULL) {
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ExFreePool(uniStr);
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return NULL;
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}
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RtlZeroMemory(uniStr->Buffer, length);
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uniStr->Length = 0;
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uniStr->MaximumLength = (USHORT)length;
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/* Convert filename string to ansi string and then to UniCode string */
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RtlInitAnsiString(&ansiStr, cstr);
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RtlAnsiStringToUnicodeString(uniStr, &ansiStr, FALSE);
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return uniStr;
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}
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/****************************************************************************
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PARAMETERS:
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uniStr - UniCode string structure to free
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REMARKS:
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Frees a string allocated by the above _PM_CStringToUnicodeString function.
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****************************************************************************/
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void _PM_FreeUnicodeString(
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UNICODE_STRING *uniStr)
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{
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if (uniStr) {
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ExFreePool(uniStr->Buffer);
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ExFreePool(uniStr);
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}
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}
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