dll/win32/winmm/mmio.c

   1 /*
   2  * MMIO functions
   3  *
   4  * Copyright 1998 Andrew Taylor
   5  * Copyright 1998 Ove Kåven
   6  * Copyright 2000,2002 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /* Still to be done:
  24  *      + correct handling of global/local IOProcs (and temporary IOProcs)
  25  *      + mode of mmio objects is not used (read vs write vs readwrite)
  26  *      + thread safeness
  27  *      + 32 A <=> W message mapping
  28  */
  29
  30 #include "winemm.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  33
  34 static WINE_MMIO *MMIOList;
  35
  36 /**************************************************************************
  37  *                      mmioDosIOProc                           [internal]
  38  */
  39 static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
  40                                       LPARAM lParam1, LPARAM lParam2)
  41 {
  42     LRESULT     ret = MMSYSERR_NOERROR;
  43
  44     TRACE("(%p, %X, 0x%lx, 0x%lx);\n", lpmmioinfo, uMessage, lParam1, lParam2);
  45
  46     switch (uMessage) {
  47     case MMIOM_OPEN:
  48         {
  49             /* Parameters:
  50              * lParam1 = szFileName parameter from mmioOpen
  51              * lParam2 = reserved
  52              * Returns: zero on success, error code on error
  53              * NOTE: lDiskOffset automatically set to zero
  54              */
  55             LPCSTR      szFileName = (LPCSTR)lParam1;
  56
  57             if (lpmmioinfo->dwFlags & MMIO_GETTEMP) {
  58                 FIXME("MMIO_GETTEMP not implemented\n");
  59                 return MMIOERR_CANNOTOPEN;
  60             }
  61
  62             /* if filename NULL, assume open file handle in adwInfo[0] */
  63             if (szFileName) {
  64                 OFSTRUCT    ofs;
  65                 lpmmioinfo->adwInfo[0] = (DWORD)OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
  66             }
  67             if (lpmmioinfo->adwInfo[0] == (DWORD)HFILE_ERROR)
  68                 ret = MMIOERR_CANNOTOPEN;
  69         }
  70         break;
  71
  72     case MMIOM_CLOSE:
  73         /* Parameters:
  74          * lParam1 = wFlags parameter from mmioClose
  75          * lParam2 = unused
  76          * Returns: zero on success, error code on error
  77          */
  78         if (!(lParam1 & MMIO_FHOPEN))
  79             _lclose((HFILE)lpmmioinfo->adwInfo[0]);
  80         break;
  81
  82     case MMIOM_READ:
  83         /* Parameters:
  84          * lParam1 = huge pointer to read buffer
  85          * lParam2 = number of bytes to read
  86          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
  87          *         in wErrorRet)
  88          */
  89         ret = _lread((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
  90         if (ret != -1)
  91             lpmmioinfo->lDiskOffset += ret;
  92
  93         break;
  94
  95     case MMIOM_WRITE:
  96     case MMIOM_WRITEFLUSH:
  97         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
  98
  99         /* Parameters:
 100          * lParam1 = huge pointer to write buffer
 101          * lParam2 = number of bytes to write
 102          * Returns: number of bytes written, -1 for error (error code in
 103          *              wErrorRet)
 104          */
 105         ret = _hwrite((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 106         if (ret != -1)
 107             lpmmioinfo->lDiskOffset += ret;
 108         break;
 109
 110     case MMIOM_SEEK:
 111         /* Parameters:
 112          * lParam1 = new position
 113          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 114          * Returns: new file postion, -1 on error
 115          */
 116         ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 117         if (ret != -1)
 118             lpmmioinfo->lDiskOffset = ret;
 119         return ret;
 120
 121     case MMIOM_RENAME:
 122         /* Parameters:
 123          * lParam1 = old name
 124          * lParam2 = new name
 125          * Returns: zero on success, non-zero on failure
 126          */
 127          if (!MoveFileA((const char*)lParam1, (const char*)lParam2))
 128              ret = MMIOERR_FILENOTFOUND;
 129          break;
 130
 131     default:
 132         FIXME("unexpected message %u\n", uMessage);
 133         return 0;
 134     }
 135
 136     return ret;
 137 }
 138
 139 /**************************************************************************
 140  *                      mmioMemIOProc                           [internal]
 141  */
 142 static LRESULT CALLBACK mmioMemIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 143                                       LPARAM lParam1, LPARAM lParam2)
 144 {
 145     TRACE("(%p,0x%04x,0x%08lx,0x%08lx)\n", lpmmioinfo, uMessage, lParam1, lParam2);
 146
 147     switch (uMessage) {
 148
 149     case MMIOM_OPEN:
 150         /* Parameters:
 151          * lParam1 = filename (must be NULL)
 152          * lParam2 = reserved
 153          * Returns: zero on success, error code on error
 154          * NOTE: lDiskOffset automatically set to zero
 155          */
 156         /* FIXME: io proc shouldn't change it */
 157         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 158             lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 159         lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 160         return 0;
 161
 162     case MMIOM_CLOSE:
 163         /* Parameters:
 164          * lParam1 = wFlags parameter from mmioClose
 165          * lParam2 = unused
 166          * Returns: zero on success, error code on error
 167          */
 168         return 0;
 169
 170     case MMIOM_READ:
 171         /* Parameters:
 172          * lParam1 = huge pointer to read buffer
 173          * lParam2 = number of bytes to read
 174          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 175          *         in wErrorRet)
 176          * NOTE: lDiskOffset should be updated
 177          */
 178         FIXME("MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 179         return 0;
 180
 181     case MMIOM_WRITE:
 182     case MMIOM_WRITEFLUSH:
 183         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 184
 185         /* Parameters:
 186          * lParam1 = huge pointer to write buffer
 187          * lParam2 = number of bytes to write
 188          * Returns: number of bytes written, -1 for error (error code in
 189          *              wErrorRet)
 190          * NOTE: lDiskOffset should be updated
 191          */
 192         FIXME("MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 193         return 0;
 194
 195     case MMIOM_SEEK:
 196         /* Parameters:
 197          * lParam1 = new position
 198          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 199          * Returns: new file postion, -1 on error
 200          * NOTE: lDiskOffset should be updated
 201          */
 202         FIXME("MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 203         return -1;
 204
 205     default:
 206         FIXME("unexpected message %u\n", uMessage);
 207         return 0;
 208     }
 209 }
 210
 211 /* This array will be the entire list for most apps
 212  * Note that temporary ioProcs will be stored with a 0 fourCC code
 213  */
 214
 215 static struct IOProcList defaultProcs[] = {
 216     {&defaultProcs[1], FOURCC_DOS, (LPMMIOPROC)mmioDosIOProc, FALSE, 0},
 217     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, FALSE, 0},
 218 };
 219
 220 static struct IOProcList*       pIOProcListAnchor = &defaultProcs[0];
 221
 222 /****************************************************************
 223  *              MMIO_FindProcNode                       [INTERNAL]
 224  *
 225  * Finds the ProcList node associated with a given FOURCC code.
 226  */
 227 static struct IOProcList*       MMIO_FindProcNode(FOURCC fccIOProc)
 228 {
 229     struct IOProcList*  pListNode;
 230
 231     for (pListNode = pIOProcListAnchor; pListNode; pListNode = pListNode->pNext) {
 232         if (pListNode->fourCC == fccIOProc) {
 233             return pListNode;
 234         }
 235     }
 236     return NULL;
 237 }
 238
 239 /****************************************************************
 240  *              MMIO_InstallIOProc                      [INTERNAL]
 241  */
 242 static LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 243                                      DWORD dwFlags, BOOL is_unicode)
 244 {
 245     LPMMIOPROC          lpProc = NULL;
 246     struct IOProcList*  pListNode;
 247     struct IOProcList** ppListNode;
 248
 249     TRACE("(%08x, %p, %08X, %s)\n", fccIOProc, pIOProc, dwFlags, is_unicode ? "unicode" : "ansi");
 250
 251     if (dwFlags & MMIO_GLOBALPROC)
 252         FIXME("Global procedures not implemented\n");
 253
 254     /* just handle the known procedures for now */
 255     switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 256     case MMIO_INSTALLPROC:
 257         /* Create new entry for the IOProc list */
 258         pListNode = HeapAlloc(GetProcessHeap(), 0, sizeof(*pListNode));
 259         if (pListNode) {
 260             /* Fill in this node */
 261             pListNode->fourCC = fccIOProc;
 262             pListNode->pIOProc = pIOProc;
 263             pListNode->is_unicode = is_unicode;
 264             pListNode->count = 0;
 265
 266             /* Stick it on the end of the list */
 267             pListNode->pNext = pIOProcListAnchor;
 268             pIOProcListAnchor = pListNode;
 269
 270             /* Return this IOProc - that's how the caller knows we succeeded */
 271             lpProc = pIOProc;
 272         }
 273         break;
 274
 275     case MMIO_REMOVEPROC:
 276         /*
 277          * Search for the node that we're trying to remove
 278          * We search for a matching fourCC code if it's non null, or the proc
 279          * address otherwise
 280          * note that this method won't find the first item on the list, but
 281          * since the first two items on this list are ones we won't
 282          * let the user delete anyway, that's okay
 283          */
 284         ppListNode = &pIOProcListAnchor;
 285         while ((*ppListNode) &&
 286                ((fccIOProc != 0) ?
 287                 (*ppListNode)->fourCC != fccIOProc :
 288                 (*ppListNode)->pIOProc != pIOProc))
 289             ppListNode = &((*ppListNode)->pNext);
 290
 291         if (*ppListNode) { /* found it */
 292             /* FIXME: what should be done if an open mmio object uses this proc ?
 293              * shall we return an error, nuke the mmio object ?
 294              */
 295             if ((*ppListNode)->count) {
 296                 ERR("Cannot remove a mmIOProc while in use\n");
 297                 break;
 298             }
 299             /* remove it, but only if it isn't builtin */
 300             if ((*ppListNode) >= defaultProcs &&
 301                 (*ppListNode) < defaultProcs + sizeof(defaultProcs) / sizeof(defaultProcs[0])) {
 302                 WARN("Tried to remove built-in mmio proc. Skipping\n");
 303             } else {
 304                 /* Okay, nuke it */
 305                 struct IOProcList*  ptmpNode = *ppListNode;
 306                 lpProc = (*ppListNode)->pIOProc;
 307                 *ppListNode = (*ppListNode)->pNext;
 308                 HeapFree(GetProcessHeap(), 0, ptmpNode);
 309             }
 310         }
 311         break;
 312
 313     case MMIO_FINDPROC:
 314         if ((pListNode = MMIO_FindProcNode(fccIOProc))) {
 315             lpProc = pListNode->pIOProc;
 316         }
 317         break;
 318     }
 319
 320     return lpProc;
 321 }
 322
 323 /****************************************************************
 324  *              send_message                            [INTERNAL]
 325  */
 326 static LRESULT  send_message(struct IOProcList* ioProc, LPMMIOINFO mmioinfo,
 327                              DWORD wMsg, LPARAM lParam1,
 328                              LPARAM lParam2, BOOL is_unicode)
 329 {
 330     LRESULT             result = MMSYSERR_ERROR;
 331     LPARAM              lp1 = lParam1, lp2 = lParam2;
 332
 333     if (!ioProc) {
 334         ERR("ioProc NULL\n");
 335         return MMSYSERR_INVALPARAM;
 336     }
 337
 338     if (ioProc->is_unicode != is_unicode) {
 339         /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 340         FIXME("NIY 32 A<=>W mapping\n");
 341     }
 342     result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 343
 344 #if 0
 345     if (ioProc->is_unicode != is_unicode) {
 346             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 347         }
 348 #endif
 349
 350     return result;
 351 }
 352
 353 /**************************************************************************
 354  *                              MMIO_ParseExtA                  [internal]
 355  *
 356  * Parses a filename for the extension.
 357  *
 358  * RETURNS
 359  *  The FOURCC code for the extension if found, else 0.
 360  */
 361 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 362 {
 363     /* Filenames are of the form file.ext{+ABC}
 364        For now, we take the last '+' if present */
 365
 366     FOURCC ret = 0;
 367
 368     /* Note that ext{Start,End} point to the . and + respectively */
 369     LPSTR extEnd;
 370     LPSTR extStart;
 371
 372     TRACE("(%s)\n", debugstr_a(szFileName));
 373
 374     if (!szFileName)
 375         return ret;
 376
 377     /* Find the last '.' */
 378     extStart = strrchr(szFileName,'.');
 379
 380     if (!extStart) {
 381          ERR("No . in szFileName: %s\n", debugstr_a(szFileName));
 382     } else {
 383         CHAR ext[5];
 384
 385         /* Find the '+' afterwards */
 386         extEnd = strchr(extStart,'+');
 387         if (extEnd) {
 388
 389             if (extEnd - extStart - 1 > 4)
 390                 WARN("Extension length > 4\n");
 391             lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 392
 393         } else {
 394             /* No + so just an extension */
 395             if (strlen(extStart) > 4) {
 396                 WARN("Extension length > 4\n");
 397             }
 398             lstrcpynA(ext, extStart + 1, 5);
 399         }
 400         TRACE("Got extension: %s\n", debugstr_a(ext));
 401
 402         /* FOURCC codes identifying file-extensions must be uppercase */
 403         ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 404     }
 405     return ret;
 406 }
 407
 408 /**************************************************************************
 409  *                              MMIO_Get                        [internal]
 410  *
 411  * Retrieves the mmio object from current process
 412  */
 413 static LPWINE_MMIO      MMIO_Get(HMMIO h)
 414 {
 415     LPWINE_MMIO         wm = NULL;
 416
 417     EnterCriticalSection(&WINMM_cs);
 418     for (wm = MMIOList; wm; wm = wm->lpNext) {
 419         if (wm->info.hmmio == h)
 420             break;
 421     }
 422     LeaveCriticalSection(&WINMM_cs);
 423     return wm;
 424 }
 425
 426 /**************************************************************************
 427  *                              MMIO_Create                     [internal]
 428  *
 429  * Creates an internal representation for a mmio instance
 430  */
 431 static  LPWINE_MMIO             MMIO_Create(void)
 432 {
 433     static      WORD    MMIO_counter = 0;
 434     LPWINE_MMIO         wm;
 435
 436     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 437     if (wm) {
 438         EnterCriticalSection(&WINMM_cs);
 439         /* lookup next unallocated WORD handle, with a non NULL value */
 440         while (++MMIO_counter == 0 || MMIO_Get((HMMIO)(ULONG_PTR)MMIO_counter));
 441         wm->info.hmmio = (HMMIO)(ULONG_PTR)MMIO_counter;
 442         wm->lpNext = MMIOList;
 443         MMIOList = wm;
 444         LeaveCriticalSection(&WINMM_cs);
 445     }
 446     return wm;
 447 }
 448
 449 /**************************************************************************
 450  *                              MMIO_Destroy                    [internal]
 451  *-
 452  * Destroys an internal representation for a mmio instance
 453  */
 454 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 455 {
 456     LPWINE_MMIO*        m;
 457
 458     EnterCriticalSection(&WINMM_cs);
 459     /* search for the matching one... */
 460     m = &MMIOList;
 461     while (*m && *m != wm) m = &(*m)->lpNext;
 462     /* ...and destroy */
 463     if (*m) {
 464         *m = (*m)->lpNext;
 465         HeapFree(GetProcessHeap(), 0, wm);
 466         wm = NULL;
 467     }
 468     LeaveCriticalSection(&WINMM_cs);
 469     return wm ? FALSE : TRUE;
 470 }
 471
 472 /****************************************************************
 473  *                      MMIO_Flush                      [INTERNAL]
 474  */
 475 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 476 {
 477     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 478         /* not quite sure what to do here, but I'll guess */
 479         if (wm->info.dwFlags & MMIO_DIRTY) {
 480             /* FIXME: error handling */
 481             send_message(wm->ioProc, &wm->info, MMIOM_SEEK, wm->info.lBufOffset, SEEK_SET, FALSE);
 482             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 483                          (LPARAM)wm->info.pchBuffer,
 484                          wm->info.pchNext - wm->info.pchBuffer, FALSE);
 485         }
 486         if (uFlags & MMIO_EMPTYBUF)
 487             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 488     }
 489     wm->info.dwFlags &= ~MMIO_DIRTY;
 490
 491     return MMSYSERR_NOERROR;
 492 }
 493
 494 /***************************************************************************
 495  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 496  */
 497 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 498 {
 499     LONG        size = wm->info.cchBuffer;
 500
 501     TRACE("bo=%x do=%x of=%lx\n",
 502           wm->info.lBufOffset, wm->info.lDiskOffset,
 503           send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, FALSE));
 504
 505     wm->info.lBufOffset = wm->info.lDiskOffset;
 506     wm->info.pchNext = wm->info.pchBuffer;
 507     wm->info.pchEndRead = wm->info.pchBuffer;
 508     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 509
 510     wm->bBufferLoaded = TRUE;
 511     if (for_read) {
 512         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 513                             (LPARAM)wm->info.pchBuffer, size, FALSE);
 514         if (size > 0)
 515             wm->info.pchEndRead += size;
 516         else
 517             wm->bBufferLoaded = FALSE;
 518     }
 519
 520     return size;
 521 }
 522
 523 /***************************************************************************
 524  *                      MMIO_SetBuffer                          [INTERNAL]
 525  */
 526 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 527                                UINT uFlags)
 528 {
 529     TRACE("(%p %p %d %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 530
 531     if (cchBuffer > 0xFFFF)
 532         WARN("Untested handling of huge mmio buffers (%d >= 64k)\n", cchBuffer);
 533
 534     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 535         return MMIOERR_CANNOTWRITE;
 536
 537     /* free previous buffer if allocated */
 538     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 539         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 540         wm->info.pchBuffer = NULL;
 541         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 542     }
 543
 544     if (pchBuffer) {
 545         wm->info.pchBuffer = pchBuffer;
 546     } else if (cchBuffer) {
 547         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 548             return MMIOERR_OUTOFMEMORY;
 549         wm->info.dwFlags |= MMIO_ALLOCBUF;
 550     } else {
 551         wm->info.pchBuffer = NULL;
 552     }
 553
 554     wm->info.cchBuffer = cchBuffer;
 555     wm->info.pchNext = wm->info.pchBuffer;
 556     wm->info.pchEndRead = wm->info.pchBuffer;
 557     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 558     wm->info.lBufOffset = wm->info.lDiskOffset;
 559     wm->bBufferLoaded = FALSE;
 560
 561     return MMSYSERR_NOERROR;
 562 }
 563
 564 /**************************************************************************
 565  *                      MMIO_Open                               [internal]
 566  */
 567 static HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags, BOOL is_unicode)
 568 {
 569     LPWINE_MMIO         wm;
 570     MMIOINFO            mmioinfo;
 571
 572     TRACE("('%s', %p, %08X, %s);\n", szFileName, refmminfo, dwOpenFlags, is_unicode ? "unicode" : "ansi");
 573
 574     if (!refmminfo) {
 575         refmminfo = &mmioinfo;
 576
 577         mmioinfo.fccIOProc = 0;
 578         mmioinfo.pIOProc = NULL;
 579         mmioinfo.pchBuffer = NULL;
 580         mmioinfo.cchBuffer = 0;
 581         is_unicode = FALSE;
 582     }
 583
 584     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 585         char    buffer[MAX_PATH];
 586
 587         if (!szFileName)
 588             return (HMMIO)FALSE;
 589         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 590             return (HMMIO)FALSE;
 591         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 592             return (HMMIO)FALSE;
 593         strcpy(szFileName, buffer);
 594         return (HMMIO)TRUE;
 595     }
 596
 597     if ((wm = MMIO_Create()) == NULL)
 598         return 0;
 599
 600     /* If both params are NULL, then parse the file name if available */
 601     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 602         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 603         /* Handle any unhandled/error case. Assume DOS file */
 604         if (wm->info.fccIOProc == 0)
 605             wm->info.fccIOProc = FOURCC_DOS;
 606         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) {
 607             /* If not found, retry with FOURCC_DOS */
 608             wm->info.fccIOProc = FOURCC_DOS;
 609             if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc)))
 610                 goto error2;
 611         }
 612         wm->bTmpIOProc = FALSE;
 613     }
 614     /* if just the four character code is present, look up IO proc */
 615     else if (refmminfo->pIOProc == NULL) {
 616         wm->info.fccIOProc = refmminfo->fccIOProc;
 617         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 618         wm->bTmpIOProc = FALSE;
 619     }
 620     /* if IO proc specified, use it and specified four character code */
 621     else {
 622         wm->info.fccIOProc = refmminfo->fccIOProc;
 623         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 624                            MMIO_INSTALLPROC, is_unicode);
 625         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 626         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 627         wm->bTmpIOProc = TRUE;
 628     }
 629
 630     wm->ioProc->count++;
 631     wm->info.dwFlags = dwOpenFlags;
 632
 633     if (dwOpenFlags & MMIO_ALLOCBUF) {
 634         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer,
 635             refmminfo->cchBuffer ? refmminfo->cchBuffer : MMIO_DEFAULTBUFFER, 0);
 636         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 637             goto error1;
 638     } else {
 639         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 640         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 641             goto error1;
 642     }
 643
 644     if (wm->info.fccIOProc == FOURCC_MEM && !(wm->info.dwFlags & MMIO_ALLOCBUF))
 645         wm->bBufferLoaded = TRUE;
 646
 647     /* see mmioDosIOProc for that one */
 648     wm->info.adwInfo[0] = refmminfo->adwInfo[0];
 649
 650     /* call IO proc to actually open file */
 651     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 652                                         (LPARAM)szFileName, 0, FALSE);
 653
 654     /* grab file size, when possible (FIXME: not 64 bit safe) */
 655     wm->dwFileSize = GetFileSize((HANDLE)(ULONG_PTR)wm->info.adwInfo[0], NULL);
 656
 657     if (refmminfo->wErrorRet == 0)
 658         return wm->info.hmmio;
 659  error1:
 660     if (wm->ioProc) wm->ioProc->count--;
 661  error2:
 662     MMIO_Destroy(wm);
 663     return 0;
 664 }
 665
 666 /**************************************************************************
 667  *                              mmioOpenW                       [WINMM.@]
 668  */
 669 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 670                        DWORD dwOpenFlags)
 671 {
 672     HMMIO       ret;
 673     LPSTR       szFn = NULL;
 674
 675     if (szFileName)
 676     {
 677         INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
 678         szFn = HeapAlloc( GetProcessHeap(), 0, len );
 679         if (!szFn) return NULL;
 680         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
 681     }
 682
 683     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, TRUE);
 684
 685     HeapFree(GetProcessHeap(), 0, szFn);
 686     return ret;
 687 }
 688
 689 /**************************************************************************
 690  *                              mmioOpenA                       [WINMM.@]
 691  */
 692 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 693                        DWORD dwOpenFlags)
 694 {
 695     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, FALSE);
 696 }
 697
 698 /**************************************************************************
 699  *                              mmioClose               [WINMM.@]
 700  */
 701 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 702 {
 703     LPWINE_MMIO wm;
 704     MMRESULT    result;
 705
 706     TRACE("(%p, %04X);\n", hmmio, uFlags);
 707
 708     if ((wm = MMIO_Get(hmmio)) == NULL)
 709         return MMSYSERR_INVALHANDLE;
 710
 711     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 712         return result;
 713
 714     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE, uFlags, 0, FALSE);
 715
 716     MMIO_SetBuffer(wm, NULL, 0, 0);
 717
 718     wm->ioProc->count--;
 719
 720     if (wm->bTmpIOProc)
 721         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 722                            MMIO_REMOVEPROC, wm->ioProc->is_unicode);
 723
 724     MMIO_Destroy(wm);
 725
 726     return result;
 727 }
 728
 729 /**************************************************************************
 730  *                              mmioRead                [WINMM.@]
 731  */
 732 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 733 {
 734     LPWINE_MMIO wm;
 735     LONG        count;
 736
 737     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 738
 739     if ((wm = MMIO_Get(hmmio)) == NULL)
 740         return -1;
 741
 742     /* unbuffered case first */
 743     if (!wm->info.pchBuffer)
 744         return send_message(wm->ioProc, &wm->info, MMIOM_READ, (LPARAM)pch, cch, FALSE);
 745
 746     /* first try from current buffer */
 747     if (wm->info.pchNext != wm->info.pchEndRead) {
 748         count = wm->info.pchEndRead - wm->info.pchNext;
 749         if (count > cch || count < 0) count = cch;
 750         memcpy(pch, wm->info.pchNext, count);
 751         wm->info.pchNext += count;
 752         pch += count;
 753         cch -= count;
 754     } else
 755         count = 0;
 756
 757     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 758         assert(wm->info.cchBuffer);
 759
 760         while (cch) {
 761             LONG size;
 762
 763             size = MMIO_GrabNextBuffer(wm, TRUE);
 764             if (size <= 0) break;
 765             if (size > cch) size = cch;
 766             memcpy(pch, wm->info.pchBuffer, size);
 767             wm->info.pchNext += size;
 768             pch += size;
 769             cch -= size;
 770             count += size;
 771         }
 772     }
 773
 774     TRACE("count=%d\n", count);
 775     return count;
 776 }
 777
 778 /**************************************************************************
 779  *                              mmioWrite               [WINMM.@]
 780  */
 781 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 782 {
 783     LPWINE_MMIO wm;
 784     LONG        count;
 785
 786     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 787
 788     if ((wm = MMIO_Get(hmmio)) == NULL)
 789         return -1;
 790
 791     if (wm->info.cchBuffer) {
 792         LONG    bytesW = 0;
 793
 794         count = 0;
 795         while (cch) {
 796             if (wm->info.pchNext != wm->info.pchEndWrite) {
 797                 count = wm->info.pchEndWrite - wm->info.pchNext;
 798                 if (count > cch || count < 0) count = cch;
 799                 memcpy(wm->info.pchNext, pch, count);
 800                 wm->info.pchNext += count;
 801                 pch += count;
 802                 cch -= count;
 803                 bytesW += count;
 804                 wm->info.dwFlags |= MMIO_DIRTY;
 805             } else {
 806                 if (wm->info.fccIOProc == FOURCC_MEM) {
 807                     if (wm->info.adwInfo[0]) {
 808                         /* from where would we get the memory handle? */
 809                         FIXME("memory file expansion not implemented!\n");
 810                         break;
 811                     } else break;
 812                 }
 813             }
 814
 815             if (wm->info.pchNext == wm->info.pchEndWrite)
 816             {
 817                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 818                 MMIO_GrabNextBuffer(wm, FALSE);
 819             }
 820             else break;
 821         }
 822         count = bytesW;
 823     } else {
 824         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)pch, cch, FALSE);
 825         wm->info.lBufOffset = wm->info.lDiskOffset;
 826     }
 827
 828     TRACE("bytes written=%d\n", count);
 829     return count;
 830 }
 831
 832 /**************************************************************************
 833  *                              mmioSeek                [WINMM.@]
 834  */
 835 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 836 {
 837     LPWINE_MMIO wm;
 838     LONG        offset;
 839
 840     TRACE("(%p, %08X, %d);\n", hmmio, lOffset, iOrigin);
 841
 842     if ((wm = MMIO_Get(hmmio)) == NULL)
 843         return MMSYSERR_INVALHANDLE;
 844
 845     /* not buffered, direct seek on file */
 846     if (!wm->info.pchBuffer)
 847         return send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, iOrigin, FALSE);
 848
 849     switch (iOrigin) {
 850     case SEEK_SET:
 851         offset = lOffset;
 852         break;
 853     case SEEK_CUR:
 854         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 855         break;
 856     case SEEK_END:
 857         offset = ((wm->info.fccIOProc == FOURCC_MEM)? wm->info.cchBuffer : wm->dwFileSize) - lOffset;
 858         break;
 859     default:
 860         return -1;
 861     }
 862
 863     if (offset && offset >= wm->dwFileSize && wm->info.fccIOProc != FOURCC_MEM) {
 864         /* should check that write mode exists */
 865         if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 866             return -1;
 867         wm->info.lBufOffset = offset;
 868         wm->info.pchEndRead = wm->info.pchBuffer;
 869         wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 870         if ((wm->info.dwFlags & MMIO_RWMODE) == MMIO_READ) {
 871             wm->info.lDiskOffset = wm->dwFileSize;
 872         }
 873     } else if ((wm->info.cchBuffer > 0) &&
 874         ((offset < wm->info.lBufOffset) ||
 875          (offset >= wm->info.lBufOffset + wm->info.cchBuffer) ||
 876          !wm->bBufferLoaded)) {
 877         /* stay in same buffer ? */
 878         /* some memory mapped buffers are defined with -1 as a size */
 879
 880         /* condition to change buffer */
 881         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 882             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 883             /* this also sets the wm->info.lDiskOffset field */
 884             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 885                          (offset / wm->info.cchBuffer) * wm->info.cchBuffer,
 886                          SEEK_SET, FALSE) == -1)
 887             return -1;
 888         MMIO_GrabNextBuffer(wm, TRUE);
 889     }
 890
 891     wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 892
 893     TRACE("=> %d\n", offset);
 894     return offset;
 895 }
 896
 897 /**************************************************************************
 898  *                              mmioGetInfo             [WINMM.@]
 899  */
 900 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 901 {
 902     LPWINE_MMIO         wm;
 903
 904     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 905
 906     if ((wm = MMIO_Get(hmmio)) == NULL)
 907         return MMSYSERR_INVALHANDLE;
 908
 909     *lpmmioinfo = wm->info;
 910
 911     return MMSYSERR_NOERROR;
 912 }
 913
 914 /**************************************************************************
 915  *                              mmioSetInfo             [WINMM.@]
 916  */
 917 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 918 {
 919     LPWINE_MMIO         wm;
 920
 921     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 922
 923     if ((wm = MMIO_Get(hmmio)) == NULL)
 924         return MMSYSERR_INVALHANDLE;
 925
 926     /* check pointers coherence */
 927     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 928         lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 929         lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 930         lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 931         lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 932         lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 933         return MMSYSERR_INVALPARAM;
 934
 935     wm->info.pchNext = lpmmioinfo->pchNext;
 936     wm->info.pchEndRead = lpmmioinfo->pchEndRead;
 937
 938     return MMSYSERR_NOERROR;
 939 }
 940
 941 /**************************************************************************
 942 *                               mmioSetBuffer           [WINMM.@]
 943 */
 944 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 945 {
 946     LPWINE_MMIO         wm;
 947
 948     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%d, uFlags=%#08x)\n",
 949           hmmio, pchBuffer, cchBuffer, uFlags);
 950
 951     if ((wm = MMIO_Get(hmmio)) == NULL)
 952         return MMSYSERR_INVALHANDLE;
 953
 954     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 955 }
 956
 957 /**************************************************************************
 958  *                              mmioFlush               [WINMM.@]
 959  */
 960 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 961 {
 962     LPWINE_MMIO         wm;
 963
 964     TRACE("(%p, %04X)\n", hmmio, uFlags);
 965
 966     if ((wm = MMIO_Get(hmmio)) == NULL)
 967         return MMSYSERR_INVALHANDLE;
 968
 969     return MMIO_Flush(wm, uFlags);
 970 }
 971
 972 /**************************************************************************
 973  *                              mmioAdvance             [WINMM.@]
 974  */
 975 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 976 {
 977     LPWINE_MMIO         wm;
 978
 979     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
 980
 981     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
 982      * here. be sure if you change something here to check mmioAdvance16 as well
 983      */
 984     if ((wm = MMIO_Get(hmmio)) == NULL)
 985         return MMSYSERR_INVALHANDLE;
 986
 987     if (!wm->info.cchBuffer)
 988         return MMIOERR_UNBUFFERED;
 989
 990     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
 991         return MMSYSERR_INVALPARAM;
 992
 993     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
 994     {
 995         send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lpmmioinfo->lBufOffset, SEEK_SET, FALSE);
 996         send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)lpmmioinfo->pchBuffer,
 997                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, FALSE);
 998         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
 999     }
1000     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1001         return MMIOERR_CANNOTWRITE;
1002
1003     if (lpmmioinfo) {
1004         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1005                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1006     }
1007     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1008
1009     if (lpmmioinfo) {
1010         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1011         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1012             (wm->info.pchEndRead - wm->info.pchBuffer);
1013         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1014             (wm->info.pchEndWrite - wm->info.pchBuffer);
1015         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1016         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1017     }
1018     return MMSYSERR_NOERROR;
1019 }
1020
1021 /**************************************************************************
1022  *                              mmioStringToFOURCCA     [WINMM.@]
1023  */
1024 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1025 {
1026     CHAR cc[4];
1027     int i = 0;
1028
1029     for (i = 0; i < 4 && sz[i]; i++) {
1030         if (uFlags & MMIO_TOUPPER) {
1031             cc[i] = toupper(sz[i]);
1032         } else {
1033             cc[i] = sz[i];
1034         }
1035     }
1036
1037     /* Pad with spaces */
1038     while (i < 4) cc[i++] = ' ';
1039
1040     TRACE("Got '%.4s'\n",cc);
1041     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1042 }
1043
1044 /**************************************************************************
1045  *                              mmioStringToFOURCCW     [WINMM.@]
1046  */
1047 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1048 {
1049     char        szA[4];
1050
1051     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1052     return mmioStringToFOURCCA(szA,uFlags);
1053 }
1054
1055 /**************************************************************************
1056  *                              mmioInstallIOProcA         [WINMM.@]
1057  */
1058 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1059                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1060 {
1061     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, FALSE);
1062 }
1063
1064 /**************************************************************************
1065  *                              mmioInstallIOProcW         [WINMM.@]
1066  */
1067 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1068                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1069 {
1070     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, TRUE);
1071 }
1072
1073 /******************************************************************
1074  *              MMIO_SendMessage
1075  *
1076  *
1077  */
1078 static LRESULT  MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1079                                  LPARAM lParam2, BOOL is_unicode)
1080 {
1081     LPWINE_MMIO         wm;
1082
1083     TRACE("(%p, %u, %ld, %ld, %s)\n", hmmio, uMessage, lParam1, lParam2, is_unicode ? "unicode" : "ansi");
1084
1085     if (uMessage < MMIOM_USER)
1086         return MMSYSERR_INVALPARAM;
1087
1088     if ((wm = MMIO_Get(hmmio)) == NULL)
1089         return MMSYSERR_INVALHANDLE;
1090
1091     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, is_unicode);
1092 }
1093
1094 /**************************************************************************
1095  *                              mmioSendMessage         [WINMM.@]
1096  */
1097 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1098                                LPARAM lParam1, LPARAM lParam2)
1099 {
1100     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, FALSE);
1101 }
1102
1103 /**************************************************************************
1104  *                              mmioDescend             [WINMM.@]
1105  */
1106 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1107                             const MMCKINFO* lpckParent, UINT uFlags)
1108 {
1109     DWORD               dwOldPos;
1110     FOURCC              srchCkId;
1111     FOURCC              srchType;
1112
1113     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1114
1115     if (lpck == NULL)
1116         return MMSYSERR_INVALPARAM;
1117
1118     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1119     TRACE("dwOldPos=%d\n", dwOldPos);
1120
1121     if (lpckParent != NULL) {
1122         TRACE("seek inside parent at %d !\n", lpckParent->dwDataOffset);
1123         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1124         if (dwOldPos < lpckParent->dwDataOffset ||
1125             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1126             WARN("outside parent chunk\n");
1127             return MMIOERR_CHUNKNOTFOUND;
1128         }
1129     }
1130
1131     /* The SDK docu says 'ckid' is used for all cases. Real World
1132      * examples disagree -Marcus,990216.
1133      */
1134
1135     srchCkId = 0;
1136     srchType = 0;
1137
1138     /* find_chunk looks for 'ckid' */
1139     if (uFlags & MMIO_FINDCHUNK)
1140         srchCkId = lpck->ckid;
1141
1142     /* find_riff and find_list look for 'fccType' */
1143     if (uFlags & MMIO_FINDLIST)
1144     {
1145         srchCkId = FOURCC_LIST;
1146         srchType = lpck->fccType;
1147     }
1148
1149     if (uFlags & MMIO_FINDRIFF)
1150     {
1151         srchCkId = FOURCC_RIFF;
1152         srchType = lpck->fccType;
1153     }
1154
1155     TRACE("searching for %4.4s.%4.4s\n",
1156           (LPCSTR)&srchCkId, srchType ? (LPCSTR)&srchType : "any");
1157
1158     while (TRUE)
1159     {
1160         LONG ix;
1161
1162         ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1163         if (ix < 2*sizeof(DWORD))
1164         {
1165             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1166             WARN("return ChunkNotFound\n");
1167             return MMIOERR_CHUNKNOTFOUND;
1168         }
1169
1170         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1171         TRACE("ckid=%4.4s fcc=%4.4s cksize=%08X !\n",
1172               (LPCSTR)&lpck->ckid,
1173               srchType ? (LPCSTR)&lpck->fccType:"<na>",
1174               lpck->cksize);
1175         if ( (!srchCkId || (srchCkId == lpck->ckid)) &&
1176              (!srchType || (srchType == lpck->fccType)) )
1177             break;
1178
1179         dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1180         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1181     }
1182
1183     lpck->dwFlags = 0;
1184     /* If we were looking for RIFF/LIST chunks, the final file position
1185      * is after the chunkid. If we were just looking for the chunk
1186      * it is after the cksize. So add 4 in RIFF/LIST case.
1187      */
1188     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1189         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1190     else
1191     {
1192         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1193         lpck->fccType = 0;
1194     }
1195     TRACE("lpck: ckid=%.4s, cksize=%d, dwDataOffset=%d fccType=%08X (%.4s)!\n",
1196           (LPSTR)&lpck->ckid, lpck->cksize, lpck->dwDataOffset,
1197           lpck->fccType, srchType?(LPSTR)&lpck->fccType:"");
1198     return MMSYSERR_NOERROR;
1199 }
1200
1201 /**************************************************************************
1202  *                              mmioAscend              [WINMM.@]
1203  */
1204 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1205 {
1206     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1207
1208     if (lpck->dwFlags & MMIO_DIRTY) {
1209         DWORD   dwOldPos, dwNewSize;
1210
1211         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1212         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1213         TRACE("dwOldPos=%d lpck->dwDataOffset = %d\n", dwOldPos, lpck->dwDataOffset);
1214         dwNewSize = dwOldPos - lpck->dwDataOffset;
1215         if (dwNewSize != lpck->cksize) {
1216             TRACE("Nope: lpck->cksize=%d dwNewSize=%d\n", lpck->cksize, dwNewSize);
1217             lpck->cksize = dwNewSize;
1218
1219             /* pad odd size with 0 */
1220             if (dwNewSize & 1) {
1221                 char ch = 0;
1222                 mmioWrite(hmmio, &ch, 1);
1223             }
1224             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1225             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1226         }
1227         lpck->dwFlags = 0;
1228     }
1229
1230     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1231
1232     return MMSYSERR_NOERROR;
1233 }
1234
1235 /**************************************************************************
1236  *                      mmioCreateChunk                         [WINMM.@]
1237  */
1238 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1239 {
1240     DWORD       dwOldPos;
1241     LONG        size;
1242     LONG        ix;
1243
1244     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1245
1246     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1247     TRACE("dwOldPos=%d\n", dwOldPos);
1248
1249     if (uFlags == MMIO_CREATELIST)
1250         lpck->ckid = FOURCC_LIST;
1251     else if (uFlags == MMIO_CREATERIFF)
1252         lpck->ckid = FOURCC_RIFF;
1253
1254     TRACE("ckid=%.4s\n", (LPSTR)&lpck->ckid);
1255
1256     size = 2 * sizeof(DWORD);
1257     lpck->dwDataOffset = dwOldPos + size;
1258
1259     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1260         size += sizeof(DWORD);
1261     lpck->dwFlags = MMIO_DIRTY;
1262
1263     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1264     TRACE("after mmioWrite ix = %d req = %d, errno = %d\n", ix, size, errno);
1265     if (ix < size) {
1266         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1267         WARN("return CannotWrite\n");
1268         return MMIOERR_CANNOTWRITE;
1269     }
1270
1271     return MMSYSERR_NOERROR;
1272 }
1273
1274 /**************************************************************************
1275  *                              mmioRenameA                     [WINMM.@]
1276  */
1277 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1278                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1279 {
1280     struct IOProcList*  ioProc = NULL;
1281     struct IOProcList   tmp;
1282     FOURCC              fcc;
1283
1284     TRACE("('%s', '%s', %p, %08X);\n",
1285           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1286
1287     /* If both params are NULL, then parse the file name */
1288     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1289     {
1290         fcc = MMIO_ParseExtA(szFileName);
1291         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1292     }
1293
1294     /* Handle any unhandled/error case from above. Assume DOS file */
1295     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1296         ioProc = MMIO_FindProcNode(FOURCC_DOS);
1297     /* if just the four character code is present, look up IO proc */
1298     else if (lpmmioinfo->pIOProc == NULL)
1299         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1300     else /* use relevant ioProc */
1301     {
1302         ioProc = &tmp;
1303         tmp.fourCC = lpmmioinfo->fccIOProc;
1304         tmp.pIOProc = lpmmioinfo->pIOProc;
1305         tmp.is_unicode = FALSE;
1306         tmp.count = 1;
1307     }
1308
1309     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1310      * or make a copy of it because it's const ???
1311      */
1312     return send_message(ioProc, (MMIOINFO*)lpmmioinfo, MMIOM_RENAME,
1313                         (LPARAM)szFileName, (LPARAM)szNewFileName, FALSE);
1314 }
1315
1316 /**************************************************************************
1317  *                              mmioRenameW                     [WINMM.@]
1318  */
1319 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1320                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1321 {
1322     LPSTR       szFn = NULL;
1323     LPSTR       sznFn = NULL;
1324     UINT        ret = MMSYSERR_NOMEM;
1325     INT         len;
1326
1327     if (szFileName)
1328     {
1329         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1330         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1331         if (!szFn) goto done;
1332         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1333     }
1334     if (szNewFileName)
1335     {
1336         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1337         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1338         if (!sznFn) goto done;
1339         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1340     }
1341
1342     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1343
1344 done:
1345     HeapFree(GetProcessHeap(),0,szFn);
1346     HeapFree(GetProcessHeap(),0,sznFn);
1347     return ret;
1348 }