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wine/dlls/mmsystem.dll16/mmio16.c

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/*
* MMSYSTEM mmio* functions
*
* Copyright 1993 Martin Ayotte
* 1998-2003,2009 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <string.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "mmsystem.h"
#include "winternl.h"
#include "wownt32.h"
#include "winnls.h"
#include "wine/winuser16.h"
#include "winemm16.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(mmsys);
/* ###################################################
* # MMIO #
* ###################################################
*/
#include <pshpack1.h>
#define MMIO_MAX_THUNKS 32
static struct mmio_thunk
{
BYTE popl_eax; /* popl %eax (return address) */
BYTE pushl_func; /* pushl $pfn16 (16bit callback function) */
LPMMIOPROC16 pfn16;
BYTE pushl_eax; /* pushl %eax */
BYTE jmp; /* ljmp MMIO_Callback1632 */
DWORD callback;
HMMIO hMmio; /* Handle to 32bit mmio object */
SEGPTR segbuffer; /* actual segmented ptr to buffer */
} *MMIO_Thunks;
#include <poppack.h>
static CRITICAL_SECTION mmio_cs;
static CRITICAL_SECTION_DEBUG mmio_critsect_debug =
{
0, 0, &mmio_cs,
{ &mmio_critsect_debug.ProcessLocksList, &mmio_critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": mmsystem_mmio_cs") }
};
static CRITICAL_SECTION mmio_cs = { &mmio_critsect_debug, -1, 0, 0, 0, 0 };
/****************************************************************
* MMIO_Map32To16 [INTERNAL]
*/
static LRESULT MMIO_Map32To16(DWORD wMsg, LPARAM* lp1, LPARAM* lp2)
{
switch (wMsg) {
case MMIOM_CLOSE:
case MMIOM_SEEK:
/* nothing to do */
break;
case MMIOM_OPEN:
case MMIOM_READ:
case MMIOM_WRITE:
case MMIOM_WRITEFLUSH:
*lp1 = MapLS( (void *)*lp1 );
break;
case MMIOM_RENAME:
*lp1 = MapLS( (void *)*lp1 );
*lp2 = MapLS( (void *)*lp2 );
break;
default:
if (wMsg < MMIOM_USER)
TRACE("Not a mappable message (%d)\n", wMsg);
}
return MMSYSERR_NOERROR;
}
/****************************************************************
* MMIO_UnMap32To16 [INTERNAL]
*/
static LRESULT MMIO_UnMap32To16(DWORD wMsg, LPARAM lParam1, LPARAM lParam2,
LPARAM lp1, LPARAM lp2)
{
switch (wMsg) {
case MMIOM_CLOSE:
case MMIOM_SEEK:
/* nothing to do */
break;
case MMIOM_OPEN:
case MMIOM_READ:
case MMIOM_WRITE:
case MMIOM_WRITEFLUSH:
UnMapLS( lp1 );
break;
case MMIOM_RENAME:
UnMapLS( lp1 );
UnMapLS( lp2 );
break;
default:
if (wMsg < MMIOM_USER)
TRACE("Not a mappable message (%d)\n", wMsg);
}
return MMSYSERR_NOERROR;
}
/******************************************************************
* MMIO_Callback3216
*
*
*/
static LRESULT MMIO_Callback3216(SEGPTR cb16, LPMMIOINFO lpmmioinfo, UINT uMessage,
LPARAM lParam1, LPARAM lParam2)
{
DWORD result;
MMIOINFO16 mmioInfo16;
SEGPTR segmmioInfo16;
LPARAM lp1 = lParam1, lp2 = lParam2;
WORD args[7];
if (!cb16) return MMSYSERR_INVALPARAM;
memset(&mmioInfo16, 0, sizeof(MMIOINFO16));
mmioInfo16.lDiskOffset = lpmmioinfo->lDiskOffset;
mmioInfo16.adwInfo[0] = lpmmioinfo->adwInfo[0];
mmioInfo16.adwInfo[1] = lpmmioinfo->adwInfo[1];
mmioInfo16.adwInfo[2] = lpmmioinfo->adwInfo[2];
/* map (lParam1, lParam2) into (lp1, lp2) 32=>16 */
if ((result = MMIO_Map32To16(uMessage, &lp1, &lp2)) != MMSYSERR_NOERROR)
return result;
segmmioInfo16 = MapLS(&mmioInfo16);
args[6] = HIWORD(segmmioInfo16);
args[5] = LOWORD(segmmioInfo16);
args[4] = uMessage;
args[3] = HIWORD(lp1);
args[2] = LOWORD(lp1);
args[1] = HIWORD(lp2);
args[0] = LOWORD(lp2);
WOWCallback16Ex( cb16, WCB16_PASCAL, sizeof(args), args, &result );
UnMapLS(segmmioInfo16);
MMIO_UnMap32To16(uMessage, lParam1, lParam2, lp1, lp2);
lpmmioinfo->lDiskOffset = mmioInfo16.lDiskOffset;
lpmmioinfo->adwInfo[0] = mmioInfo16.adwInfo[0];
lpmmioinfo->adwInfo[1] = mmioInfo16.adwInfo[1];
lpmmioinfo->adwInfo[2] = mmioInfo16.adwInfo[2];
return result;
}
/******************************************************************
* MMIO_AddThunk
*
*/
static struct mmio_thunk* MMIO_AddThunk(LPMMIOPROC16 pfn16, HPSTR segbuf)
{
struct mmio_thunk* thunk;
if (!MMIO_Thunks)
{
MMIO_Thunks = VirtualAlloc(NULL, MMIO_MAX_THUNKS * sizeof(*MMIO_Thunks), MEM_COMMIT,
PAGE_EXECUTE_READWRITE);
if (!MMIO_Thunks) return NULL;
for (thunk = MMIO_Thunks; thunk < &MMIO_Thunks[MMIO_MAX_THUNKS]; thunk++)
{
thunk->popl_eax = 0x58; /* popl %eax */
thunk->pushl_func = 0x68; /* pushl $pfn16 */
thunk->pfn16 = 0;
thunk->pushl_eax = 0x50; /* pushl %eax */
thunk->jmp = 0xe9; /* jmp MMIO_Callback3216 */
thunk->callback = (char *)MMIO_Callback3216 - (char *)(&thunk->callback + 1);
thunk->hMmio = NULL;
thunk->segbuffer = 0;
}
}
for (thunk = MMIO_Thunks; thunk < &MMIO_Thunks[MMIO_MAX_THUNKS]; thunk++)
{
if (thunk->pfn16 == 0 && thunk->hMmio == NULL)
{
thunk->pfn16 = pfn16;
thunk->hMmio = NULL;
thunk->segbuffer = (SEGPTR)segbuf;
return thunk;
}
}
FIXME("Out of mmio-thunks. Bump MMIO_MAX_THUNKS\n");
return NULL;
}
/******************************************************************
* MMIO_HasThunk
*
*/
static struct mmio_thunk* MMIO_HasThunk(HMMIO hmmio)
{
struct mmio_thunk* thunk;
if (!MMIO_Thunks) return NULL;
for (thunk = MMIO_Thunks; thunk < &MMIO_Thunks[MMIO_MAX_THUNKS]; thunk++)
{
if (thunk->hMmio == hmmio) return thunk;
}
return NULL;
}
/******************************************************************
* MMIO_SetSegmentedBuffer
*
*/
static void MMIO_SetSegmentedBuffer(struct mmio_thunk* thunk, SEGPTR ptr, BOOL release)
{
if (release) UnMapLS(thunk->segbuffer);
thunk->segbuffer = ptr;
}
/**************************************************************************
* mmioOpen [MMSYSTEM.1210]
*/
HMMIO16 WINAPI mmioOpen16(LPSTR szFileName, MMIOINFO16* lpmmioinfo16,
DWORD dwOpenFlags)
{
HMMIO ret;
if (lpmmioinfo16) {
MMIOINFO mmioinfo;
struct mmio_thunk* thunk = NULL;
memset(&mmioinfo, 0, sizeof(mmioinfo));
EnterCriticalSection(&mmio_cs);
if (!(thunk = MMIO_AddThunk(lpmmioinfo16->pIOProc, lpmmioinfo16->pchBuffer)))
{
LeaveCriticalSection(&mmio_cs);
return 0;
}
mmioinfo.dwFlags = lpmmioinfo16->dwFlags;
mmioinfo.fccIOProc = lpmmioinfo16->fccIOProc;
mmioinfo.pIOProc = lpmmioinfo16->pIOProc ? (LPMMIOPROC)thunk : 0;
mmioinfo.cchBuffer = lpmmioinfo16->cchBuffer;
mmioinfo.pchBuffer = MapSL((DWORD)lpmmioinfo16->pchBuffer);
mmioinfo.adwInfo[0] = lpmmioinfo16->adwInfo[0];
/* if we don't have a file name, it's likely a passed open file descriptor */
if (!szFileName)
mmioinfo.adwInfo[0] = (DWORD)DosFileHandleToWin32Handle(mmioinfo.adwInfo[0]);
mmioinfo.adwInfo[1] = lpmmioinfo16->adwInfo[1];
mmioinfo.adwInfo[2] = lpmmioinfo16->adwInfo[2];
ret = mmioOpenA(szFileName, &mmioinfo, dwOpenFlags);
if (!ret || (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)))
{
thunk->pfn16 = NULL;
thunk->hMmio = NULL;
}
else thunk->hMmio = ret;
if (ret && (dwOpenFlags & MMIO_ALLOCBUF))
{
MMIOINFO m;
if (lpmmioinfo16->pchBuffer) FIXME("ooch\n");
/* FIXME: check whether mmioOpen should set pchBuffer */
mmioGetInfo(ret, &m, 0);
thunk->segbuffer = MapLS(m.pchBuffer);
}
LeaveCriticalSection(&mmio_cs);
lpmmioinfo16->wErrorRet = mmioinfo.wErrorRet;
lpmmioinfo16->hmmio = HMMIO_16(mmioinfo.hmmio);
} else {
ret = mmioOpenA(szFileName, NULL, dwOpenFlags);
}
return HMMIO_16(ret);
}
/**************************************************************************
* mmioClose [MMSYSTEM.1211]
*/
MMRESULT16 WINAPI mmioClose16(HMMIO16 hmmio, UINT16 uFlags)
{
MMRESULT ret;
EnterCriticalSection(&mmio_cs);
ret = mmioClose(HMMIO_32(hmmio), uFlags);
if (ret == MMSYSERR_NOERROR)
{
struct mmio_thunk* thunk;
if ((thunk = MMIO_HasThunk(HMMIO_32(hmmio))))
{
MMIO_SetSegmentedBuffer(thunk, 0, TRUE);
thunk->pfn16 = NULL;
thunk->hMmio = NULL;
}
}
LeaveCriticalSection(&mmio_cs);
return ret;
}
/**************************************************************************
* mmioRead [MMSYSTEM.1212]
*/
LONG WINAPI mmioRead16(HMMIO16 hmmio, HPSTR pch, LONG cch)
{
return mmioRead(HMMIO_32(hmmio), pch, cch);
}
/**************************************************************************
* mmioWrite [MMSYSTEM.1213]
*/
LONG WINAPI mmioWrite16(HMMIO16 hmmio, HPCSTR pch, LONG cch)
{
return mmioWrite(HMMIO_32(hmmio),pch,cch);
}
/**************************************************************************
* mmioSeek [MMSYSTEM.1214]
*/
LONG WINAPI mmioSeek16(HMMIO16 hmmio, LONG lOffset, INT16 iOrigin)
{
return mmioSeek(HMMIO_32(hmmio), lOffset, iOrigin);
}
/**************************************************************************
* mmioGetInfo [MMSYSTEM.1215]
*/
MMRESULT16 WINAPI mmioGetInfo16(HMMIO16 hmmio, MMIOINFO16* lpmmioinfo, UINT16 uFlags)
{
MMIOINFO mmioinfo;
MMRESULT ret;
struct mmio_thunk* thunk;
TRACE("(0x%04x,%p,0x%08x)\n", hmmio, lpmmioinfo, uFlags);
EnterCriticalSection(&mmio_cs);
if ((thunk = MMIO_HasThunk(HMMIO_32(hmmio))) == NULL)
{
LeaveCriticalSection(&mmio_cs);
return MMSYSERR_INVALHANDLE;
}
ret = mmioGetInfo(HMMIO_32(hmmio), &mmioinfo, uFlags);
if (ret != MMSYSERR_NOERROR)
{
LeaveCriticalSection(&mmio_cs);
return ret;
}
lpmmioinfo->dwFlags = mmioinfo.dwFlags;
lpmmioinfo->fccIOProc = mmioinfo.fccIOProc;
lpmmioinfo->pIOProc = thunk->pfn16;
lpmmioinfo->wErrorRet = mmioinfo.wErrorRet;
lpmmioinfo->hTask = HTASK_16(mmioinfo.hTask);
lpmmioinfo->cchBuffer = mmioinfo.cchBuffer;
lpmmioinfo->pchBuffer = (void*)thunk->segbuffer;
lpmmioinfo->pchNext = (void*)(thunk->segbuffer + (mmioinfo.pchNext - mmioinfo.pchBuffer));
lpmmioinfo->pchEndRead = (void*)(thunk->segbuffer + (mmioinfo.pchEndRead - mmioinfo.pchBuffer));
lpmmioinfo->pchEndWrite = (void*)(thunk->segbuffer + (mmioinfo.pchEndWrite - mmioinfo.pchBuffer));
lpmmioinfo->lBufOffset = mmioinfo.lBufOffset;
lpmmioinfo->lDiskOffset = mmioinfo.lDiskOffset;
lpmmioinfo->adwInfo[0] = mmioinfo.adwInfo[0];
lpmmioinfo->adwInfo[1] = mmioinfo.adwInfo[1];
lpmmioinfo->adwInfo[2] = mmioinfo.adwInfo[2];
lpmmioinfo->dwReserved1 = 0;
lpmmioinfo->dwReserved2 = 0;
lpmmioinfo->hmmio = HMMIO_16(mmioinfo.hmmio);
LeaveCriticalSection(&mmio_cs);
return MMSYSERR_NOERROR;
}
/**************************************************************************
* mmioSetInfo [MMSYSTEM.1216]
*/
MMRESULT16 WINAPI mmioSetInfo16(HMMIO16 hmmio, const MMIOINFO16* lpmmioinfo, UINT16 uFlags)
{
MMIOINFO mmioinfo;
MMRESULT ret;
TRACE("(0x%04x,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
ret = mmioGetInfo(HMMIO_32(hmmio), &mmioinfo, 0);
if (ret != MMSYSERR_NOERROR) return ret;
/* check if seg and lin buffers are the same */
if (mmioinfo.cchBuffer != lpmmioinfo->cchBuffer ||
mmioinfo.pchBuffer != MapSL((DWORD)lpmmioinfo->pchBuffer))
return MMSYSERR_INVALPARAM;
/* check pointers coherence */
if (lpmmioinfo->pchNext < lpmmioinfo->pchBuffer ||
lpmmioinfo->pchNext > lpmmioinfo->pchBuffer + lpmmioinfo->cchBuffer ||
lpmmioinfo->pchEndRead < lpmmioinfo->pchBuffer ||
lpmmioinfo->pchEndRead > lpmmioinfo->pchBuffer + lpmmioinfo->cchBuffer ||
lpmmioinfo->pchEndWrite < lpmmioinfo->pchBuffer ||
lpmmioinfo->pchEndWrite > lpmmioinfo->pchBuffer + lpmmioinfo->cchBuffer)
return MMSYSERR_INVALPARAM;
mmioinfo.pchNext = mmioinfo.pchBuffer + (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer);
mmioinfo.pchEndRead = mmioinfo.pchBuffer + (lpmmioinfo->pchEndRead - lpmmioinfo->pchBuffer);
mmioinfo.pchEndWrite = mmioinfo.pchBuffer + (lpmmioinfo->pchEndWrite - lpmmioinfo->pchBuffer);
return mmioSetInfo(HMMIO_32(hmmio), &mmioinfo, uFlags);
}
/**************************************************************************
* mmioSetBuffer [MMSYSTEM.1217]
*/
MMRESULT16 WINAPI mmioSetBuffer16(HMMIO16 hmmio, LPSTR pchBuffer,
LONG cchBuffer, UINT16 uFlags)
{
MMRESULT ret = mmioSetBuffer(HMMIO_32(hmmio), MapSL((DWORD)pchBuffer),
cchBuffer, uFlags);
if (ret == MMSYSERR_NOERROR)
{
struct mmio_thunk* thunk;
if ((thunk = MMIO_HasThunk(HMMIO_32(hmmio))) == NULL)
{
FIXME("really ?\n");
return MMSYSERR_INVALHANDLE;
}
MMIO_SetSegmentedBuffer(thunk, (DWORD)pchBuffer, TRUE);
}
else
UnMapLS((DWORD)pchBuffer);
return ret;
}
/**************************************************************************
* mmioFlush [MMSYSTEM.1218]
*/
MMRESULT16 WINAPI mmioFlush16(HMMIO16 hmmio, UINT16 uFlags)
{
return mmioFlush(HMMIO_32(hmmio), uFlags);
}
/***********************************************************************
* mmioAdvance [MMSYSTEM.1219]
*/
MMRESULT16 WINAPI mmioAdvance16(HMMIO16 hmmio, MMIOINFO16* lpmmioinfo, UINT16 uFlags)
{
MMIOINFO mmioinfo;
LRESULT ret;
/* WARNING: this heavily relies on mmioAdvance implementation (for choosing which
* fields to init
*/
if (lpmmioinfo)
{
mmioinfo.pchBuffer = MapSL((DWORD)lpmmioinfo->pchBuffer);
mmioinfo.pchNext = MapSL((DWORD)lpmmioinfo->pchNext);
mmioinfo.dwFlags = lpmmioinfo->dwFlags;
mmioinfo.lBufOffset = lpmmioinfo->lBufOffset;
ret = mmioAdvance(HMMIO_32(hmmio), &mmioinfo, uFlags);
}
else
ret = mmioAdvance(HMMIO_32(hmmio), NULL, uFlags);
if (ret != MMSYSERR_NOERROR) return ret;
if (lpmmioinfo)
{
lpmmioinfo->dwFlags = mmioinfo.dwFlags;
lpmmioinfo->pchNext = (void*)(lpmmioinfo->pchBuffer + (mmioinfo.pchNext - mmioinfo.pchBuffer));
lpmmioinfo->pchEndRead = (void*)(lpmmioinfo->pchBuffer + (mmioinfo.pchEndRead - mmioinfo.pchBuffer));
lpmmioinfo->pchEndWrite = (void*)(lpmmioinfo->pchBuffer + (mmioinfo.pchEndWrite - mmioinfo.pchBuffer));
lpmmioinfo->lBufOffset = mmioinfo.lBufOffset;
lpmmioinfo->lDiskOffset = mmioinfo.lDiskOffset;
}
return MMSYSERR_NOERROR;
}
/**************************************************************************
* mmioStringToFOURCC [MMSYSTEM.1220]
*/
FOURCC WINAPI mmioStringToFOURCC16(LPCSTR sz, UINT16 uFlags)
{
return mmioStringToFOURCCA(sz, uFlags);
}
/**************************************************************************
* mmioInstallIOProc [MMSYSTEM.1221]
*/
LPMMIOPROC16 WINAPI mmioInstallIOProc16(FOURCC fccIOProc, LPMMIOPROC16 pIOProc,
DWORD dwFlags)
{
struct mmio_thunk* thunk = NULL;
LPMMIOPROC pIOProc32;
EnterCriticalSection(&mmio_cs);
switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
case MMIO_INSTALLPROC:
if (!(thunk = MMIO_AddThunk(pIOProc, NULL)))
{
LeaveCriticalSection(&mmio_cs);
return NULL;
}
if (!mmioInstallIOProcA(fccIOProc, (LPMMIOPROC)thunk, dwFlags))
{
thunk->pfn16 = NULL;
pIOProc = NULL;
}
break;
case MMIO_REMOVEPROC:
if (MMIO_Thunks)
{
for (thunk = MMIO_Thunks; thunk < &MMIO_Thunks[MMIO_MAX_THUNKS]; thunk++)
{
if (thunk->pfn16 == pIOProc && thunk->segbuffer == 0)
{
if (mmioInstallIOProcA(fccIOProc, (LPMMIOPROC)thunk, dwFlags))
thunk->pfn16 = NULL;
else
pIOProc = NULL;
break;
}
}
}
if (!thunk) pIOProc = NULL;
break;
case MMIO_FINDPROC:
if ((pIOProc32 = mmioInstallIOProcA(fccIOProc, NULL, dwFlags)) && MMIO_Thunks)
{
for (thunk = MMIO_Thunks; thunk < &MMIO_Thunks[MMIO_MAX_THUNKS]; thunk++)
{
if ((LPMMIOPROC)thunk == pIOProc32)
{
pIOProc = thunk->pfn16;
break;
}
}
}
break;
default:
WINE_FIXME("Unsupported flags %08x\n", dwFlags);
pIOProc = NULL;
}
LeaveCriticalSection(&mmio_cs);
return pIOProc;
}
/**************************************************************************
* mmioSendMessage [MMSYSTEM.1222]
*/
LRESULT WINAPI mmioSendMessage16(HMMIO16 hmmio, UINT16 uMessage,
LPARAM lParam1, LPARAM lParam2)
{
struct mmio_thunk* thunk;
if ((thunk = MMIO_HasThunk(HMMIO_32(hmmio))))
{
MMIOINFO mmioinfo;
if (mmioGetInfo(HMMIO_32(hmmio), &mmioinfo, 0) == MMSYSERR_NOERROR)
{
return MMIO_Callback3216((SEGPTR)thunk->pfn16, &mmioinfo, uMessage, lParam1, lParam2);
}
return MMSYSERR_INVALHANDLE;
}
else
{
/* FIXME: we need to map lParam1 and lParam2 to 32bit entities */
return mmioSendMessage(HMMIO_32(hmmio), uMessage, lParam1, lParam2);
}
}
/**************************************************************************
* mmioDescend [MMSYSTEM.1223]
*/
MMRESULT16 WINAPI mmioDescend16(HMMIO16 hmmio, LPMMCKINFO lpck,
const MMCKINFO* lpckParent, UINT16 uFlags)
{
return mmioDescend(HMMIO_32(hmmio), lpck, lpckParent, uFlags);
}
/**************************************************************************
* mmioAscend [MMSYSTEM.1224]
*/
MMRESULT16 WINAPI mmioAscend16(HMMIO16 hmmio, MMCKINFO* lpck, UINT16 uFlags)
{
return mmioAscend(HMMIO_32(hmmio),lpck,uFlags);
}
/**************************************************************************
* mmioCreateChunk [MMSYSTEM.1225]
*/
MMRESULT16 WINAPI mmioCreateChunk16(HMMIO16 hmmio, MMCKINFO* lpck, UINT16 uFlags)
{
return mmioCreateChunk(HMMIO_32(hmmio), lpck, uFlags);
}
/**************************************************************************
* mmioRename [MMSYSTEM.1226]
*/
MMRESULT16 WINAPI mmioRename16(LPCSTR szFileName, LPCSTR szNewFileName,
MMIOINFO16* lpmmioinfo, DWORD dwRenameFlags)
{
BOOL inst = FALSE;
MMRESULT ret;
MMIOINFO mmioinfo;
if (lpmmioinfo != NULL && lpmmioinfo->pIOProc != NULL &&
lpmmioinfo->fccIOProc == 0) {
FIXME("Can't handle this case yet\n");
return MMSYSERR_ERROR;
}
/* this is a bit hacky, but it'll work if we get a fourCC code or nothing.
* but a non installed ioproc without a fourcc won't do
*/
if (lpmmioinfo && lpmmioinfo->fccIOProc && lpmmioinfo->pIOProc) {
mmioInstallIOProc16(lpmmioinfo->fccIOProc, lpmmioinfo->pIOProc,
MMIO_INSTALLPROC);
inst = TRUE;
}
memset(&mmioinfo, 0, sizeof(mmioinfo));
if (lpmmioinfo)
mmioinfo.fccIOProc = lpmmioinfo->fccIOProc;
ret = mmioRenameA(szFileName, szNewFileName, &mmioinfo, dwRenameFlags);
if (inst) {
mmioInstallIOProc16(lpmmioinfo->fccIOProc, NULL, MMIO_REMOVEPROC);
}
return ret;
}
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