dlls/winmm/mmio.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2 /*
   3  * MMIO functions
   4  *
   5  * Copyright 1998 Andrew Taylor
   6  * Copyright 1998 Ove Kåven
   7  * Copyright 2000,2002 Eric Pouech
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 /* Still to be done:
  25  *      + correct handling of global/local IOProcs (and temporary IOProcs)
  26  *      + mode of mmio objects is not used (read vs write vs readwrite)
  27  *      + thread safeness
  28  *      + 32 A <=> W message mapping
  29  */
  30
  31
  32 #include <ctype.h>
  33 #include <stdarg.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <assert.h>
  38
  39 #include "windef.h"
  40 #include "winbase.h"
  41 #include "winnls.h"
  42 #include "mmsystem.h"
  43 #include "winemm.h"
  44
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  48
  49 LRESULT         (*pFnMmioCallback16)(DWORD,LPMMIOINFO,UINT,LPARAM,LPARAM) /* = NULL */;
  50
  51 /**************************************************************************
  52  *                      mmioDosIOProc                           [internal]
  53  */
  54 static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
  55                                       LPARAM lParam1, LPARAM lParam2)
  56 {
  57     LRESULT     ret = MMSYSERR_NOERROR;
  58
  59     TRACE("(%p, %X, 0x%lx, 0x%lx);\n", lpmmioinfo, uMessage, lParam1, lParam2);
  60
  61     switch (uMessage) {
  62     case MMIOM_OPEN:
  63         {
  64             /* Parameters:
  65              * lParam1 = szFileName parameter from mmioOpen
  66              * lParam2 = reserved
  67              * Returns: zero on success, error code on error
  68              * NOTE: lDiskOffset automatically set to zero
  69              */
  70             LPCSTR      szFileName = (LPCSTR)lParam1;
  71
  72             if (lpmmioinfo->dwFlags & MMIO_GETTEMP) {
  73                 FIXME("MMIO_GETTEMP not implemented\n");
  74                 return MMIOERR_CANNOTOPEN;
  75             }
  76
  77             /* if filename NULL, assume open file handle in adwInfo[0] */
  78             if (szFileName) {
  79                 OFSTRUCT    ofs;
  80                 lpmmioinfo->adwInfo[0] = (DWORD)OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
  81             }
  82             if (lpmmioinfo->adwInfo[0] == (DWORD)HFILE_ERROR)
  83                 ret = MMIOERR_CANNOTOPEN;
  84         }
  85         break;
  86
  87     case MMIOM_CLOSE:
  88         /* Parameters:
  89          * lParam1 = wFlags parameter from mmioClose
  90          * lParam2 = unused
  91          * Returns: zero on success, error code on error
  92          */
  93         if (!(lParam1 & MMIO_FHOPEN))
  94             _lclose((HFILE)lpmmioinfo->adwInfo[0]);
  95         break;
  96
  97     case MMIOM_READ:
  98         /* Parameters:
  99          * lParam1 = huge pointer to read buffer
 100          * lParam2 = number of bytes to read
 101          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 102          *         in wErrorRet)
 103          */
 104         ret = _lread((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 105         if (ret != -1)
 106             lpmmioinfo->lDiskOffset += ret;
 107
 108         break;
 109
 110     case MMIOM_WRITE:
 111     case MMIOM_WRITEFLUSH:
 112         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 113
 114         /* Parameters:
 115          * lParam1 = huge pointer to write buffer
 116          * lParam2 = number of bytes to write
 117          * Returns: number of bytes written, -1 for error (error code in
 118          *              wErrorRet)
 119          */
 120         ret = _hwrite((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 121         if (ret != -1)
 122             lpmmioinfo->lDiskOffset += ret;
 123         break;
 124
 125     case MMIOM_SEEK:
 126         /* Parameters:
 127          * lParam1 = new position
 128          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 129          * Returns: new file postion, -1 on error
 130          */
 131         ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 132         if (ret != -1)
 133             lpmmioinfo->lDiskOffset = ret;
 134         return ret;
 135
 136     case MMIOM_RENAME:
 137         /* Parameters:
 138          * lParam1 = old name
 139          * lParam2 = new name
 140          * Returns: zero on success, non-zero on failure
 141          */
 142          if (!MoveFileA((const char*)lParam1, (const char*)lParam2))
 143              ret = MMIOERR_FILENOTFOUND;
 144          break;
 145
 146     default:
 147         FIXME("unexpected message %u\n", uMessage);
 148         return 0;
 149     }
 150
 151     return ret;
 152 }
 153
 154 /**************************************************************************
 155  *                      mmioMemIOProc                           [internal]
 156  */
 157 static LRESULT CALLBACK mmioMemIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 158                                       LPARAM lParam1, LPARAM lParam2)
 159 {
 160     TRACE("(%p,0x%04x,0x%08lx,0x%08lx)\n", lpmmioinfo, uMessage, lParam1, lParam2);
 161
 162     switch (uMessage) {
 163
 164     case MMIOM_OPEN:
 165         /* Parameters:
 166          * lParam1 = filename (must be NULL)
 167          * lParam2 = reserved
 168          * Returns: zero on success, error code on error
 169          * NOTE: lDiskOffset automatically set to zero
 170          */
 171         /* FIXME: io proc shouldn't change it */
 172         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 173             lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 174         lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 175         return 0;
 176
 177     case MMIOM_CLOSE:
 178         /* Parameters:
 179          * lParam1 = wFlags parameter from mmioClose
 180          * lParam2 = unused
 181          * Returns: zero on success, error code on error
 182          */
 183         return 0;
 184
 185     case MMIOM_READ:
 186         /* Parameters:
 187          * lParam1 = huge pointer to read buffer
 188          * lParam2 = number of bytes to read
 189          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 190          *         in wErrorRet)
 191          * NOTE: lDiskOffset should be updated
 192          */
 193         FIXME("MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 194         return 0;
 195
 196     case MMIOM_WRITE:
 197     case MMIOM_WRITEFLUSH:
 198         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 199
 200         /* Parameters:
 201          * lParam1 = huge pointer to write buffer
 202          * lParam2 = number of bytes to write
 203          * Returns: number of bytes written, -1 for error (error code in
 204          *              wErrorRet)
 205          * NOTE: lDiskOffset should be updated
 206          */
 207         FIXME("MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 208         return 0;
 209
 210     case MMIOM_SEEK:
 211         /* Parameters:
 212          * lParam1 = new position
 213          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 214          * Returns: new file postion, -1 on error
 215          * NOTE: lDiskOffset should be updated
 216          */
 217         FIXME("MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 218         return -1;
 219
 220     default:
 221         FIXME("unexpected message %u\n", uMessage);
 222         return 0;
 223     }
 224
 225     return 0;
 226 }
 227
 228 /* This array will be the entire list for most apps
 229  * Note that temporary ioProcs will be stored with a 0 fourCC code
 230  */
 231
 232 static struct IOProcList defaultProcs[] = {
 233     {&defaultProcs[1], FOURCC_DOS, (LPMMIOPROC)mmioDosIOProc, MMIO_PROC_32A, 0},
 234     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, MMIO_PROC_32A, 0},
 235 };
 236
 237 static struct IOProcList*       pIOProcListAnchor = &defaultProcs[0];
 238
 239 /****************************************************************
 240  *              MMIO_FindProcNode                       [INTERNAL]
 241  *
 242  * Finds the ProcList node associated with a given FOURCC code.
 243  */
 244 static struct IOProcList*       MMIO_FindProcNode(FOURCC fccIOProc)
 245 {
 246     struct IOProcList*  pListNode;
 247
 248     for (pListNode = pIOProcListAnchor; pListNode; pListNode = pListNode->pNext) {
 249         if (pListNode->fourCC == fccIOProc) {
 250             return pListNode;
 251         }
 252     }
 253     return NULL;
 254 }
 255
 256 /****************************************************************
 257  *              MMIO_InstallIOProc                      [INTERNAL]
 258  */
 259 LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 260                               DWORD dwFlags, enum mmioProcType type)
 261 {
 262     LPMMIOPROC          lpProc = NULL;
 263     struct IOProcList*  pListNode;
 264     struct IOProcList** ppListNode;
 265
 266     TRACE("(%08lx, %p, %08lX, %i)\n", fccIOProc, pIOProc, dwFlags, type);
 267
 268     if (dwFlags & MMIO_GLOBALPROC)
 269         FIXME("Global procedures not implemented\n");
 270
 271     /* just handle the known procedures for now */
 272     switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 273     case MMIO_INSTALLPROC:
 274         /* Create new entry for the IOProc list */
 275         pListNode = HeapAlloc(GetProcessHeap(), 0, sizeof(*pListNode));
 276         if (pListNode) {
 277             /* Fill in this node */
 278             pListNode->fourCC = fccIOProc;
 279             pListNode->pIOProc = pIOProc;
 280             pListNode->type = type;
 281             pListNode->count = 0;
 282
 283             /* Stick it on the end of the list */
 284             pListNode->pNext = pIOProcListAnchor;
 285             pIOProcListAnchor = pListNode;
 286
 287             /* Return this IOProc - that's how the caller knows we succeeded */
 288             lpProc = pIOProc;
 289         }
 290         break;
 291
 292     case MMIO_REMOVEPROC:
 293         /*
 294          * Search for the node that we're trying to remove
 295          * We search for a matching fourCC code if it's non null, or the proc
 296          * address otherwise
 297          * note that this method won't find the first item on the list, but
 298          * since the first two items on this list are ones we won't
 299          * let the user delete anyway, that's okay
 300          */
 301         ppListNode = &pIOProcListAnchor;
 302         while ((*ppListNode) &&
 303                ((fccIOProc != 0) ?
 304                 (*ppListNode)->fourCC != fccIOProc :
 305                 (*ppListNode)->pIOProc != pIOProc))
 306             ppListNode = &((*ppListNode)->pNext);
 307
 308         if (*ppListNode) { /* found it */
 309             /* FIXME: what should be done if an open mmio object uses this proc ?
 310              * shall we return an error, nuke the mmio object ?
 311              */
 312             if ((*ppListNode)->count) {
 313                 ERR("Cannot remove a mmIOProc while in use\n");
 314                 break;
 315             }
 316             /* remove it, but only if it isn't builtin */
 317             if ((*ppListNode) >= defaultProcs &&
 318                 (*ppListNode) < defaultProcs + sizeof(defaultProcs)) {
 319                 WARN("Tried to remove built-in mmio proc. Skipping\n");
 320             } else {
 321                 /* Okay, nuke it */
 322                 struct IOProcList*  ptmpNode = *ppListNode;
 323                 lpProc = (*ppListNode)->pIOProc;
 324                 *ppListNode = (*ppListNode)->pNext;
 325                 HeapFree(GetProcessHeap(), 0, ptmpNode);
 326             }
 327         }
 328         break;
 329
 330     case MMIO_FINDPROC:
 331         if ((pListNode = MMIO_FindProcNode(fccIOProc))) {
 332             lpProc = pListNode->pIOProc;
 333         }
 334         break;
 335     }
 336
 337     return lpProc;
 338 }
 339
 340 /****************************************************************
 341  *              send_message                            [INTERNAL]
 342  */
 343 static LRESULT  send_message(struct IOProcList* ioProc, LPMMIOINFO mmioinfo,
 344                              DWORD wMsg, LPARAM lParam1,
 345                              LPARAM lParam2, enum mmioProcType type)
 346 {
 347     LRESULT             result = MMSYSERR_ERROR;
 348     LPARAM              lp1 = lParam1, lp2 = lParam2;
 349
 350     if (!ioProc) {
 351         ERR("brrr\n");
 352         result = MMSYSERR_INVALPARAM;
 353     }
 354
 355     switch (ioProc->type) {
 356     case MMIO_PROC_16:
 357         if (pFnMmioCallback16)
 358             result = pFnMmioCallback16((DWORD)ioProc->pIOProc,
 359                                        mmioinfo, wMsg, lp1, lp2);
 360         break;
 361     case MMIO_PROC_32A:
 362     case MMIO_PROC_32W:
 363         if (ioProc->type != type) {
 364             /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 365             FIXME("NIY 32 A<=>W mapping\n");
 366         }
 367         result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 368
 369 #if 0
 370         if (ioProc->type != type) {
 371             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 372         }
 373 #endif
 374         break;
 375     default:
 376         FIXME("Internal error\n");
 377     }
 378
 379     return result;
 380 }
 381
 382 /**************************************************************************
 383  *                              MMIO_ParseExtA                  [internal]
 384  *
 385  * Parses a filename for the extension.
 386  *
 387  * RETURNS
 388  *  The FOURCC code for the extension if found, else 0.
 389  */
 390 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 391 {
 392     /* Filenames are of the form file.ext{+ABC}
 393        For now, we take the last '+' if present */
 394
 395     FOURCC ret = 0;
 396
 397     /* Note that ext{Start,End} point to the . and + respectively */
 398     LPSTR extEnd;
 399     LPSTR extStart;
 400
 401     TRACE("(%s)\n", debugstr_a(szFileName));
 402
 403     if (!szFileName)
 404         return ret;
 405
 406     /* Find the last '.' */
 407     extStart = strrchr(szFileName,'.');
 408
 409     if (!extStart) {
 410          ERR("No . in szFileName: %s\n", debugstr_a(szFileName));
 411     } else {
 412         CHAR ext[5];
 413
 414         /* Find the '+' afterwards */
 415         extEnd = strchr(extStart,'+');
 416         if (extEnd) {
 417
 418             if (extEnd - extStart - 1 > 4)
 419                 WARN("Extension length > 4\n");
 420             lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 421
 422         } else {
 423             /* No + so just an extension */
 424             if (strlen(extStart) > 4) {
 425                 WARN("Extension length > 4\n");
 426             }
 427             lstrcpynA(ext, extStart + 1, 5);
 428         }
 429         TRACE("Got extension: %s\n", debugstr_a(ext));
 430
 431         /* FOURCC codes identifying file-extensions must be uppercase */
 432         ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 433     }
 434     return ret;
 435 }
 436
 437 /**************************************************************************
 438  *                              MMIO_Get                        [internal]
 439  *
 440  * Retrieves the mmio object from current process
 441  */
 442 LPWINE_MMIO     MMIO_Get(HMMIO h)
 443 {
 444     LPWINE_MMIO         wm = NULL;
 445
 446     EnterCriticalSection(&WINMM_IData->cs);
 447     for (wm = WINMM_IData->lpMMIO; wm; wm = wm->lpNext) {
 448         if (wm->info.hmmio == h)
 449             break;
 450     }
 451     LeaveCriticalSection(&WINMM_IData->cs);
 452     return wm;
 453 }
 454
 455 /**************************************************************************
 456  *                              MMIO_Create                     [internal]
 457  *
 458  * Creates an internal representation for a mmio instance
 459  */
 460 static  LPWINE_MMIO             MMIO_Create(void)
 461 {
 462     static      WORD    MMIO_counter = 0;
 463     LPWINE_MMIO         wm;
 464
 465     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 466     if (wm) {
 467         EnterCriticalSection(&WINMM_IData->cs);
 468         /* lookup next unallocated WORD handle, with a non NULL value */
 469         while (++MMIO_counter == 0 || MMIO_Get((HMMIO)(ULONG_PTR)MMIO_counter));
 470         wm->info.hmmio = (HMMIO)(ULONG_PTR)MMIO_counter;
 471         wm->lpNext = WINMM_IData->lpMMIO;
 472         WINMM_IData->lpMMIO = wm;
 473         LeaveCriticalSection(&WINMM_IData->cs);
 474     }
 475     return wm;
 476 }
 477
 478 /**************************************************************************
 479  *                              MMIO_Destroy                    [internal]
 480  *-
 481  * Destroys an internal representation for a mmio instance
 482  */
 483 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 484 {
 485     LPWINE_MMIO*        m;
 486
 487     EnterCriticalSection(&WINMM_IData->cs);
 488     /* search for the matching one... */
 489     m = &(WINMM_IData->lpMMIO);
 490     while (*m && *m != wm) m = &(*m)->lpNext;
 491     /* ...and destroy */
 492     if (*m) {
 493         *m = (*m)->lpNext;
 494         HeapFree(GetProcessHeap(), 0, wm);
 495         wm = NULL;
 496     }
 497     LeaveCriticalSection(&WINMM_IData->cs);
 498     return wm ? FALSE : TRUE;
 499 }
 500
 501 /****************************************************************
 502  *                      MMIO_Flush                      [INTERNAL]
 503  */
 504 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 505 {
 506     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 507         /* not quite sure what to do here, but I'll guess */
 508         if (wm->info.dwFlags & MMIO_DIRTY) {
 509             /* FIXME: error handling */
 510             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 511                          wm->info.lBufOffset, SEEK_SET, MMIO_PROC_32A);
 512             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 513                          (LPARAM)wm->info.pchBuffer,
 514                          wm->info.pchNext - wm->info.pchBuffer, MMIO_PROC_32A);
 515         }
 516         if (uFlags & MMIO_EMPTYBUF)
 517             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 518     }
 519     wm->info.dwFlags &= ~MMIO_DIRTY;
 520
 521     return MMSYSERR_NOERROR;
 522 }
 523
 524 /***************************************************************************
 525  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 526  */
 527 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 528 {
 529     LONG        size = wm->info.cchBuffer;
 530
 531     TRACE("bo=%lx do=%lx of=%lx\n",
 532           wm->info.lBufOffset, wm->info.lDiskOffset,
 533           send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, MMIO_PROC_32A));
 534
 535     wm->info.lBufOffset = wm->info.lDiskOffset;
 536     wm->info.pchNext = wm->info.pchBuffer;
 537     wm->info.pchEndRead = wm->info.pchBuffer;
 538     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 539
 540     wm->bBufferLoaded = TRUE;
 541     if (for_read) {
 542         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 543                             (LPARAM)wm->info.pchBuffer, size, MMIO_PROC_32A);
 544         if (size > 0)
 545             wm->info.pchEndRead += size;
 546         else
 547             wm->bBufferLoaded = FALSE;
 548     }
 549
 550     return size;
 551 }
 552
 553 /***************************************************************************
 554  *                      MMIO_SetBuffer                          [INTERNAL]
 555  */
 556 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 557                                UINT uFlags)
 558 {
 559     TRACE("(%p %p %ld %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 560
 561     if (uFlags)                 return MMSYSERR_INVALPARAM;
 562     if (cchBuffer > 0xFFFF)
 563         WARN("Untested handling of huge mmio buffers (%ld >= 64k)\n", cchBuffer);
 564
 565     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 566         return MMIOERR_CANNOTWRITE;
 567
 568     /* free previous buffer if allocated */
 569     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 570         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 571         wm->info.pchBuffer = NULL;
 572         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 573     }
 574
 575     if (pchBuffer) {
 576         wm->info.pchBuffer = pchBuffer;
 577     } else if (cchBuffer) {
 578         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 579             return MMIOERR_OUTOFMEMORY;
 580         wm->info.dwFlags |= MMIO_ALLOCBUF;
 581     } else {
 582         wm->info.pchBuffer = NULL;
 583     }
 584
 585     wm->info.cchBuffer = cchBuffer;
 586     wm->info.pchNext = wm->info.pchBuffer;
 587     wm->info.pchEndRead = wm->info.pchBuffer;
 588     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 589     wm->info.lBufOffset = 0;
 590     wm->bBufferLoaded = FALSE;
 591
 592     return MMSYSERR_NOERROR;
 593 }
 594
 595 /**************************************************************************
 596  *                      MMIO_Open                               [internal]
 597  */
 598 HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags,
 599                 enum mmioProcType type)
 600 {
 601     LPWINE_MMIO         wm;
 602     MMIOINFO            mmioinfo;
 603
 604     TRACE("('%s', %p, %08lX, %d);\n", szFileName, refmminfo, dwOpenFlags, type);
 605
 606     if (!refmminfo) {
 607         refmminfo = &mmioinfo;
 608
 609         mmioinfo.fccIOProc = 0;
 610         mmioinfo.pIOProc = NULL;
 611         mmioinfo.pchBuffer = NULL;
 612         mmioinfo.cchBuffer = 0;
 613         type = MMIO_PROC_32A;
 614     }
 615
 616     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 617         char    buffer[MAX_PATH];
 618
 619         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 620             return (HMMIO)FALSE;
 621         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 622             return (HMMIO)FALSE;
 623         strcpy(szFileName, buffer);
 624         return (HMMIO)TRUE;
 625     }
 626
 627     if ((wm = MMIO_Create()) == NULL)
 628         return 0;
 629
 630     /* If both params are NULL, then parse the file name if available */
 631     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 632         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 633         /* Handle any unhandled/error case. Assume DOS file */
 634         if (wm->info.fccIOProc == 0)
 635             wm->info.fccIOProc = FOURCC_DOS;
 636         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) {
 637             /* If not found, retry with FOURCC_DOS */
 638             wm->info.fccIOProc = FOURCC_DOS;
 639             if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc)))
 640                 goto error2;
 641         }
 642         wm->bTmpIOProc = FALSE;
 643     }
 644     /* if just the four character code is present, look up IO proc */
 645     else if (refmminfo->pIOProc == NULL) {
 646         wm->info.fccIOProc = refmminfo->fccIOProc;
 647         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 648         wm->bTmpIOProc = FALSE;
 649     }
 650     /* if IO proc specified, use it and specified four character code */
 651     else {
 652         wm->info.fccIOProc = refmminfo->fccIOProc;
 653         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 654                            MMIO_INSTALLPROC, type);
 655         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 656         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 657         wm->bTmpIOProc = TRUE;
 658     }
 659
 660     wm->bBufferLoaded = FALSE;
 661     wm->ioProc->count++;
 662
 663     if (dwOpenFlags & MMIO_ALLOCBUF) {
 664         if ((refmminfo->wErrorRet = MMIO_SetBuffer(wm, NULL, MMIO_DEFAULTBUFFER, 0)))
 665             goto error1;
 666     } else if (wm->info.fccIOProc == FOURCC_MEM) {
 667         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 668         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 669             goto error1;
 670         wm->bBufferLoaded = TRUE;
 671     } /* else => unbuffered, wm->info.pchBuffer == NULL */
 672
 673     /* see mmioDosIOProc for that one */
 674     wm->info.adwInfo[0] = refmminfo->adwInfo[0];
 675     wm->info.dwFlags = dwOpenFlags;
 676
 677     /* call IO proc to actually open file */
 678     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 679                                         (LPARAM)szFileName, 0, MMIO_PROC_32A);
 680
 681     /* grab file size, when possible */
 682     wm->dwFileSize = GetFileSize((HANDLE)wm->info.adwInfo[0], NULL);
 683
 684     if (refmminfo->wErrorRet == 0)
 685         return wm->info.hmmio;
 686  error1:
 687     if (wm->ioProc) wm->ioProc->count--;
 688  error2:
 689     MMIO_Destroy(wm);
 690     return 0;
 691 }
 692
 693 /**************************************************************************
 694  *                              mmioOpenW                       [WINMM.@]
 695  */
 696 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 697                        DWORD dwOpenFlags)
 698 {
 699     HMMIO       ret;
 700     LPSTR       szFn = NULL;
 701
 702     if (szFileName)
 703     {
 704         INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
 705         szFn = HeapAlloc( GetProcessHeap(), 0, len );
 706         if (!szFn) return NULL;
 707         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
 708     }
 709
 710     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, MMIO_PROC_32W);
 711
 712     HeapFree(GetProcessHeap(), 0, szFn);
 713     return ret;
 714 }
 715
 716 /**************************************************************************
 717  *                              mmioOpenA                       [WINMM.@]
 718  */
 719 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 720                        DWORD dwOpenFlags)
 721 {
 722     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, MMIO_PROC_32A);
 723 }
 724
 725 /**************************************************************************
 726  *                              mmioClose               [WINMM.@]
 727  */
 728 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 729 {
 730     LPWINE_MMIO wm;
 731     MMRESULT    result;
 732
 733     TRACE("(%p, %04X);\n", hmmio, uFlags);
 734
 735     if ((wm = MMIO_Get(hmmio)) == NULL)
 736         return MMSYSERR_INVALHANDLE;
 737
 738     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 739         return result;
 740
 741     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE,
 742                           uFlags, 0, MMIO_PROC_32A);
 743
 744     MMIO_SetBuffer(wm, NULL, 0, 0);
 745
 746     wm->ioProc->count--;
 747
 748     if (wm->bTmpIOProc)
 749         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 750                            MMIO_REMOVEPROC, wm->ioProc->type);
 751
 752     MMIO_Destroy(wm);
 753
 754     return result;
 755 }
 756
 757 /**************************************************************************
 758  *                              mmioRead                [WINMM.@]
 759  */
 760 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 761 {
 762     LPWINE_MMIO wm;
 763     LONG        count;
 764
 765     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 766
 767     if ((wm = MMIO_Get(hmmio)) == NULL)
 768         return -1;
 769
 770     /* unbuffered case first */
 771     if (!wm->info.pchBuffer)
 772         return send_message(wm->ioProc, &wm->info, MMIOM_READ,
 773                             (LPARAM)pch, cch, MMIO_PROC_32A);
 774
 775     /* first try from current buffer */
 776     if (wm->info.pchNext != wm->info.pchEndRead) {
 777         count = wm->info.pchEndRead - wm->info.pchNext;
 778         if (count > cch || count < 0) count = cch;
 779         memcpy(pch, wm->info.pchNext, count);
 780         wm->info.pchNext += count;
 781         pch += count;
 782         cch -= count;
 783     } else
 784         count = 0;
 785
 786     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 787         assert(wm->info.cchBuffer);
 788
 789         while (cch) {
 790             LONG size;
 791
 792             size = MMIO_GrabNextBuffer(wm, TRUE);
 793             if (size <= 0) break;
 794             if (size > cch) size = cch;
 795             memcpy(pch, wm->info.pchBuffer, size);
 796             wm->info.pchNext += size;
 797             pch += size;
 798             cch -= size;
 799             count += size;
 800         }
 801     }
 802
 803     TRACE("count=%ld\n", count);
 804     return count;
 805 }
 806
 807 /**************************************************************************
 808  *                              mmioWrite               [WINMM.@]
 809  */
 810 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 811 {
 812     LPWINE_MMIO wm;
 813     LONG        count;
 814
 815     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 816
 817     if ((wm = MMIO_Get(hmmio)) == NULL)
 818         return -1;
 819
 820     if (wm->info.cchBuffer) {
 821         LONG    bytesW = 0;
 822
 823         count = 0;
 824         while (cch) {
 825             if (wm->info.pchNext != wm->info.pchEndWrite) {
 826                 count = wm->info.pchEndWrite - wm->info.pchNext;
 827                 if (count > cch || count < 0) count = cch;
 828                 memcpy(wm->info.pchNext, pch, count);
 829                 wm->info.pchNext += count;
 830                 pch += count;
 831                 cch -= count;
 832                 bytesW += count;
 833                 wm->info.dwFlags |= MMIO_DIRTY;
 834             } else {
 835                 if (wm->info.fccIOProc == FOURCC_MEM) {
 836                     if (wm->info.adwInfo[0]) {
 837                         /* from where would we get the memory handle? */
 838                         FIXME("memory file expansion not implemented!\n");
 839                         break;
 840                     } else break;
 841                 }
 842             }
 843
 844             if (wm->info.pchNext == wm->info.pchEndWrite)
 845             {
 846                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 847                 MMIO_GrabNextBuffer(wm, FALSE);
 848             }
 849             else break;
 850         }
 851         count = bytesW;
 852     } else {
 853         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 854                              (LPARAM)pch, cch, MMIO_PROC_32A);
 855         wm->info.lBufOffset = wm->info.lDiskOffset;
 856     }
 857
 858     TRACE("bytes written=%ld\n", count);
 859     return count;
 860 }
 861
 862 /**************************************************************************
 863  *                              mmioSeek                [WINMM.@]
 864  */
 865 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 866 {
 867     LPWINE_MMIO wm;
 868     LONG        offset;
 869
 870     TRACE("(%p, %08lX, %d);\n", hmmio, lOffset, iOrigin);
 871
 872     if ((wm = MMIO_Get(hmmio)) == NULL)
 873         return MMSYSERR_INVALHANDLE;
 874
 875     /* not buffered, direct seek on file */
 876     if (!wm->info.pchBuffer)
 877         return send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 878                             lOffset, iOrigin, MMIO_PROC_32A);
 879
 880     switch (iOrigin) {
 881     case SEEK_SET:
 882         offset = lOffset;
 883         break;
 884     case SEEK_CUR:
 885         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 886         break;
 887     case SEEK_END:
 888         offset = ((wm->info.fccIOProc == FOURCC_MEM)? wm->info.cchBuffer : wm->dwFileSize) - lOffset;
 889         break;
 890     default:
 891         return -1;
 892     }
 893
 894     if (offset && offset >= wm->dwFileSize && wm->info.fccIOProc != FOURCC_MEM) {
 895         /* should check that write mode exists */
 896         if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 897             return -1;
 898         wm->info.lBufOffset = offset;
 899         wm->info.pchEndRead = wm->info.pchBuffer;
 900         wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 901         if ((wm->info.dwFlags & MMIO_RWMODE) == MMIO_READ) {
 902             wm->info.lDiskOffset = wm->dwFileSize;
 903         }
 904     } else if ((wm->info.cchBuffer > 0) &&
 905         ((offset < wm->info.lBufOffset) ||
 906          (offset >= wm->info.lBufOffset + wm->info.cchBuffer) ||
 907          !wm->bBufferLoaded)) {
 908         /* stay in same buffer ? */
 909         /* some memory mapped buffers are defined with -1 as a size */
 910
 911         /* condition to change buffer */
 912         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 913             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 914             /* this also sets the wm->info.lDiskOffset field */
 915             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 916                          (offset / wm->info.cchBuffer) * wm->info.cchBuffer,
 917                          SEEK_SET, MMIO_PROC_32A) == -1)
 918             return -1;
 919         MMIO_GrabNextBuffer(wm, TRUE);
 920     }
 921
 922     wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 923
 924     TRACE("=> %ld\n", offset);
 925     return offset;
 926 }
 927
 928 /**************************************************************************
 929  *                              mmioGetInfo             [WINMM.@]
 930  */
 931 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 932 {
 933     LPWINE_MMIO         wm;
 934
 935     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 936
 937     if ((wm = MMIO_Get(hmmio)) == NULL)
 938         return MMSYSERR_INVALHANDLE;
 939
 940     memcpy(lpmmioinfo, &wm->info, sizeof(MMIOINFO));
 941     /* don't expose 16 bit ioproc:s */
 942     if (wm->ioProc->type != MMIO_PROC_16)
 943         lpmmioinfo->pIOProc = wm->ioProc->pIOProc;
 944
 945     return MMSYSERR_NOERROR;
 946 }
 947
 948 /**************************************************************************
 949  *                              mmioSetInfo             [WINMM.@]
 950  */
 951 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 952 {
 953     LPWINE_MMIO         wm;
 954
 955     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 956
 957     if ((wm = MMIO_Get(hmmio)) == NULL)
 958         return MMSYSERR_INVALHANDLE;
 959
 960     /* check pointers coherence */
 961     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 962         lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 963         lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 964         lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 965         lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 966         lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 967         return MMSYSERR_INVALPARAM;
 968
 969     wm->info.pchNext = lpmmioinfo->pchNext;
 970     wm->info.pchEndRead = lpmmioinfo->pchEndRead;
 971
 972     return MMSYSERR_NOERROR;
 973 }
 974
 975 /**************************************************************************
 976 *                               mmioSetBuffer           [WINMM.@]
 977 */
 978 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 979 {
 980     LPWINE_MMIO         wm;
 981
 982     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%ld, uFlags=%#08x)\n",
 983           hmmio, pchBuffer, cchBuffer, uFlags);
 984
 985     if ((wm = MMIO_Get(hmmio)) == NULL)
 986         return MMSYSERR_INVALHANDLE;
 987
 988     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 989 }
 990
 991 /**************************************************************************
 992  *                              mmioFlush               [WINMM.@]
 993  */
 994 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 995 {
 996     LPWINE_MMIO         wm;
 997
 998     TRACE("(%p, %04X)\n", hmmio, uFlags);
 999
1000     if ((wm = MMIO_Get(hmmio)) == NULL)
1001         return MMSYSERR_INVALHANDLE;
1002
1003     return MMIO_Flush(wm, uFlags);
1004 }
1005
1006 /**************************************************************************
1007  *                              mmioAdvance             [WINMM.@]
1008  */
1009 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
1010 {
1011     LPWINE_MMIO         wm;
1012
1013     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
1014
1015     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1016      * here. be sure if you change something here to check mmioAdvance16 as well
1017      */
1018     if ((wm = MMIO_Get(hmmio)) == NULL)
1019         return MMSYSERR_INVALHANDLE;
1020
1021     if (!wm->info.cchBuffer)
1022         return MMIOERR_UNBUFFERED;
1023
1024     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1025         return MMSYSERR_INVALPARAM;
1026
1027     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1028     {
1029         send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
1030                      lpmmioinfo->lBufOffset, SEEK_SET, MMIO_PROC_32A);
1031         send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
1032                      (LPARAM)lpmmioinfo->pchBuffer,
1033                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, MMIO_PROC_32A);
1034         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1035     }
1036     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1037         return MMIOERR_CANNOTWRITE;
1038
1039     if (lpmmioinfo) {
1040         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1041                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1042     }
1043     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1044
1045     if (lpmmioinfo) {
1046         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1047         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1048             (wm->info.pchEndRead - wm->info.pchBuffer);
1049         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1050             (wm->info.pchEndWrite - wm->info.pchBuffer);
1051         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1052         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1053     }
1054     return MMSYSERR_NOERROR;
1055 }
1056
1057 /**************************************************************************
1058  *                              mmioStringToFOURCCA     [WINMM.@]
1059  */
1060 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1061 {
1062     CHAR cc[4];
1063     int i = 0;
1064
1065     for (i = 0; i < 4 && sz[i]; i++) {
1066         if (uFlags & MMIO_TOUPPER) {
1067             cc[i] = toupper(sz[i]);
1068         } else {
1069             cc[i] = sz[i];
1070         }
1071     }
1072
1073     /* Pad with spaces */
1074     while (i < 4) cc[i++] = ' ';
1075
1076     TRACE("Got '%.4s'\n",cc);
1077     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1078 }
1079
1080 /**************************************************************************
1081  *                              mmioStringToFOURCCW     [WINMM.@]
1082  */
1083 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1084 {
1085     char        szA[4];
1086
1087     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1088     return mmioStringToFOURCCA(szA,uFlags);
1089 }
1090
1091 /**************************************************************************
1092  *                              mmioInstallIOProcA         [WINMM.@]
1093  */
1094 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1095                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1096 {
1097     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32A);
1098 }
1099
1100 /**************************************************************************
1101  *                              mmioInstallIOProcW         [WINMM.@]
1102  */
1103 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1104                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1105 {
1106     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32W);
1107 }
1108
1109 /******************************************************************
1110  *              MMIO_SendMessage
1111  *
1112  *
1113  */
1114 LRESULT         MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1115                                  LPARAM lParam2, enum mmioProcType type)
1116 {
1117     LPWINE_MMIO         wm;
1118
1119     TRACE("(%p, %u, %ld, %ld, %d)\n", hmmio, uMessage, lParam1, lParam2, type);
1120
1121     if (uMessage < MMIOM_USER)
1122         return MMSYSERR_INVALPARAM;
1123
1124     if ((wm = MMIO_Get(hmmio)) == NULL)
1125         return MMSYSERR_INVALHANDLE;
1126
1127     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, type);
1128 }
1129
1130 /**************************************************************************
1131  *                              mmioSendMessage         [WINMM.@]
1132  */
1133 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1134                                LPARAM lParam1, LPARAM lParam2)
1135 {
1136     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, MMIO_PROC_32A);
1137 }
1138
1139 /**************************************************************************
1140  *                              mmioDescend             [WINMM.@]
1141  */
1142 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1143                             const MMCKINFO* lpckParent, UINT uFlags)
1144 {
1145     DWORD               dwOldPos;
1146     FOURCC              srchCkId;
1147     FOURCC              srchType;
1148
1149
1150     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1151
1152     if (lpck == NULL)
1153         return MMSYSERR_INVALPARAM;
1154
1155     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1156     TRACE("dwOldPos=%ld\n", dwOldPos);
1157
1158     if (lpckParent != NULL) {
1159         TRACE("seek inside parent at %ld !\n", lpckParent->dwDataOffset);
1160         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1161         if (dwOldPos < lpckParent->dwDataOffset ||
1162             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1163             WARN("outside parent chunk\n");
1164             return MMIOERR_CHUNKNOTFOUND;
1165         }
1166     }
1167
1168     /* The SDK docu says 'ckid' is used for all cases. Real World
1169      * examples disagree -Marcus,990216.
1170      */
1171
1172     srchType = 0;
1173     /* find_chunk looks for 'ckid' */
1174     if (uFlags & MMIO_FINDCHUNK)
1175         srchCkId = lpck->ckid;
1176     /* find_riff and find_list look for 'fccType' */
1177     if (uFlags & MMIO_FINDLIST) {
1178         srchCkId = FOURCC_LIST;
1179         srchType = lpck->fccType;
1180     }
1181     if (uFlags & MMIO_FINDRIFF) {
1182         srchCkId = FOURCC_RIFF;
1183         srchType = lpck->fccType;
1184     }
1185
1186     if (uFlags & (MMIO_FINDCHUNK|MMIO_FINDLIST|MMIO_FINDRIFF)) {
1187         TRACE("searching for %.4s.%.4s\n",
1188               (LPSTR)&srchCkId,
1189               srchType?(LPSTR)&srchType:"any ");
1190
1191         while (TRUE) {
1192             LONG ix;
1193
1194             ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1195             if (ix < 2*sizeof(DWORD)) {
1196                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1197                 WARN("return ChunkNotFound\n");
1198                 return MMIOERR_CHUNKNOTFOUND;
1199             }
1200             lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1201             if (ix < lpck->dwDataOffset - dwOldPos) {
1202                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1203                 WARN("return ChunkNotFound\n");
1204                 return MMIOERR_CHUNKNOTFOUND;
1205             }
1206             TRACE("ckid=%.4s fcc=%.4s cksize=%08lX !\n",
1207                   (LPSTR)&lpck->ckid,
1208                   srchType?(LPSTR)&lpck->fccType:"<na>",
1209                   lpck->cksize);
1210             if ((srchCkId == lpck->ckid) &&
1211                 (!srchType || (srchType == lpck->fccType))
1212                 )
1213                 break;
1214
1215             dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1216             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1217         }
1218     } else {
1219         /* FIXME: unverified, does it do this? */
1220         /* NB: This part is used by WAVE_mciOpen, among others */
1221         if (mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD)) < 3 * sizeof(DWORD)) {
1222             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1223             WARN("return ChunkNotFound 2nd\n");
1224             return MMIOERR_CHUNKNOTFOUND;
1225         }
1226         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1227     }
1228     lpck->dwFlags = 0;
1229     /* If we were looking for RIFF/LIST chunks, the final file position
1230      * is after the chunkid. If we were just looking for the chunk
1231      * it is after the cksize. So add 4 in RIFF/LIST case.
1232      */
1233     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1234         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1235     else
1236         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1237     TRACE("lpck: ckid=%.4s, cksize=%ld, dwDataOffset=%ld fccType=%08lX (%.4s)!\n",
1238           (LPSTR)&lpck->ckid, lpck->cksize, lpck->dwDataOffset,
1239           lpck->fccType, srchType?(LPSTR)&lpck->fccType:"");
1240     return MMSYSERR_NOERROR;
1241 }
1242
1243 /**************************************************************************
1244  *                              mmioAscend              [WINMM.@]
1245  */
1246 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1247 {
1248     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1249
1250     if (lpck->dwFlags & MMIO_DIRTY) {
1251         DWORD   dwOldPos, dwNewSize;
1252
1253         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1254         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1255         TRACE("dwOldPos=%ld lpck->dwDataOffset = %ld\n", dwOldPos, lpck->dwDataOffset);
1256         dwNewSize = dwOldPos - lpck->dwDataOffset;
1257         if (dwNewSize != lpck->cksize) {
1258             TRACE("Nope: lpck->cksize=%ld dwNewSize=%ld\n", lpck->cksize, dwNewSize);
1259             lpck->cksize = dwNewSize;
1260
1261             /* pad odd size with 0 */
1262             if (dwNewSize & 1) {
1263                 char ch = 0;
1264                 mmioWrite(hmmio, &ch, 1);
1265             }
1266             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1267             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1268         }
1269         lpck->dwFlags = 0;
1270     }
1271
1272     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1273
1274     return MMSYSERR_NOERROR;
1275 }
1276
1277 /**************************************************************************
1278  *                      mmioCreateChunk                         [WINMM.@]
1279  */
1280 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1281 {
1282     DWORD       dwOldPos;
1283     LONG        size;
1284     LONG        ix;
1285
1286     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1287
1288     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1289     TRACE("dwOldPos=%ld\n", dwOldPos);
1290
1291     if (uFlags == MMIO_CREATELIST)
1292         lpck->ckid = FOURCC_LIST;
1293     else if (uFlags == MMIO_CREATERIFF)
1294         lpck->ckid = FOURCC_RIFF;
1295
1296     TRACE("ckid=%.4s\n", (LPSTR)&lpck->ckid);
1297
1298     size = 2 * sizeof(DWORD);
1299     lpck->dwDataOffset = dwOldPos + size;
1300
1301     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1302         size += sizeof(DWORD);
1303     lpck->dwFlags = MMIO_DIRTY;
1304
1305     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1306     TRACE("after mmioWrite ix = %ld req = %ld, errno = %d\n",ix, size, errno);
1307     if (ix < size) {
1308         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1309         WARN("return CannotWrite\n");
1310         return MMIOERR_CANNOTWRITE;
1311     }
1312
1313     return MMSYSERR_NOERROR;
1314 }
1315
1316 /**************************************************************************
1317  *                              mmioRenameA                     [WINMM.@]
1318  */
1319 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1320                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1321 {
1322     struct IOProcList*  ioProc = NULL;
1323     struct IOProcList   tmp;
1324     FOURCC              fcc;
1325
1326     TRACE("('%s', '%s', %p, %08lX);\n",
1327           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1328
1329     /* If both params are NULL, then parse the file name */
1330     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1331     {
1332         fcc = MMIO_ParseExtA(szFileName);
1333         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1334     }
1335
1336     /* Handle any unhandled/error case from above. Assume DOS file */
1337     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1338         ioProc = MMIO_FindProcNode(FOURCC_DOS);
1339     /* if just the four character code is present, look up IO proc */
1340     else if (lpmmioinfo->pIOProc == NULL)
1341         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1342     else /* use relevant ioProc */
1343     {
1344         ioProc = &tmp;
1345         tmp.fourCC = lpmmioinfo->fccIOProc;
1346         tmp.pIOProc = lpmmioinfo->pIOProc;
1347         tmp.type = MMIO_PROC_32A;
1348         tmp.count = 1;
1349     }
1350
1351     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1352      * or make a copy of it because it's const ???
1353      */
1354     return send_message(ioProc, (LPMMIOINFO)lpmmioinfo, MMIOM_RENAME,
1355                         (LPARAM)szFileName, (LPARAM)szNewFileName, MMIO_PROC_32A);
1356 }
1357
1358 /**************************************************************************
1359  *                              mmioRenameW                     [WINMM.@]
1360  */
1361 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1362                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1363 {
1364     LPSTR       szFn = NULL;
1365     LPSTR       sznFn = NULL;
1366     UINT        ret;
1367     INT         len;
1368
1369     if (szFileName)
1370     {
1371         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1372         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1373         if (!szFn) return MMSYSERR_NOMEM;
1374         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1375     }
1376     if (szNewFileName)
1377     {
1378         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1379         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1380         if (!sznFn) return MMSYSERR_NOMEM;
1381         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1382     }
1383
1384     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1385
1386     HeapFree(GetProcessHeap(),0,szFn);
1387     HeapFree(GetProcessHeap(),0,sznFn);
1388     return ret;
1389 }