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)(SEGPTR,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((SEGPTR)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        FIXME: What if a '+' is part of the file name?
 394        For now, we take the last '+' present */
 395
 396     FOURCC ret = 0;
 397
 398     /* Note that ext{Start,End} point to the . and + respectively */
 399     LPSTR extEnd;
 400
 401     TRACE("(%s)\n", debugstr_a(szFileName));
 402
 403     if (!szFileName)
 404         return ret;
 405     extEnd = strrchr(szFileName,'+');
 406     if (extEnd) {
 407         /* Need to parse to find the extension */
 408         LPSTR extStart;
 409
 410         extStart = extEnd;
 411         while (extStart >= szFileName && extStart[0] != '.') {
 412             extStart--;
 413         }
 414
 415         if (extStart < szFileName) {
 416             ERR("+ but no . in szFileName: %s\n", debugstr_a(szFileName));
 417         } else {
 418             CHAR ext[5];
 419
 420             if (extEnd - extStart - 1 > 4)
 421                 WARN("Extension length > 4\n");
 422             lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 423             TRACE("Got extension: %s\n", debugstr_a(ext));
 424             /* FOURCC codes identifying file-extensions must be uppercase */
 425             ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 426         }
 427     }
 428     return ret;
 429 }
 430
 431 /**************************************************************************
 432  *                              MMIO_Get                        [internal]
 433  *
 434  * Retrieves the mmio object from current process
 435  */
 436 LPWINE_MMIO     MMIO_Get(HMMIO h)
 437 {
 438     LPWINE_MMIO         wm = NULL;
 439
 440     EnterCriticalSection(&WINMM_IData->cs);
 441     for (wm = WINMM_IData->lpMMIO; wm; wm = wm->lpNext) {
 442         if (wm->info.hmmio == h)
 443             break;
 444     }
 445     LeaveCriticalSection(&WINMM_IData->cs);
 446     return wm;
 447 }
 448
 449 /**************************************************************************
 450  *                              MMIO_Create                     [internal]
 451  *
 452  * Creates an internal representation for a mmio instance
 453  */
 454 static  LPWINE_MMIO             MMIO_Create(void)
 455 {
 456     static      WORD    MMIO_counter = 0;
 457     LPWINE_MMIO         wm;
 458
 459     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 460     if (wm) {
 461         EnterCriticalSection(&WINMM_IData->cs);
 462         /* lookup next unallocated WORD handle, with a non NULL value */
 463         while (++MMIO_counter == 0 || MMIO_Get(HMMIO_32(MMIO_counter)));
 464         wm->info.hmmio = HMMIO_32(MMIO_counter);
 465         wm->lpNext = WINMM_IData->lpMMIO;
 466         WINMM_IData->lpMMIO = wm;
 467         LeaveCriticalSection(&WINMM_IData->cs);
 468     }
 469     return wm;
 470 }
 471
 472 /**************************************************************************
 473  *                              MMIO_Destroy                    [internal]
 474  *-
 475  * Destroys an internal representation for a mmio instance
 476  */
 477 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 478 {
 479     LPWINE_MMIO*        m;
 480
 481     EnterCriticalSection(&WINMM_IData->cs);
 482     /* search for the matching one... */
 483     m = &(WINMM_IData->lpMMIO);
 484     while (*m && *m != wm) m = &(*m)->lpNext;
 485     /* ...and destroy */
 486     if (*m) {
 487         *m = (*m)->lpNext;
 488         HeapFree(GetProcessHeap(), 0, wm);
 489         wm = NULL;
 490     }
 491     LeaveCriticalSection(&WINMM_IData->cs);
 492     return wm ? FALSE : TRUE;
 493 }
 494
 495 /****************************************************************
 496  *                      MMIO_Flush                      [INTERNAL]
 497  */
 498 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 499 {
 500     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 501         /* not quite sure what to do here, but I'll guess */
 502         if (wm->info.dwFlags & MMIO_DIRTY) {
 503             /* FIXME: error handling */
 504             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 505                          wm->info.lBufOffset, SEEK_SET, MMIO_PROC_32A);
 506             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 507                          (LPARAM)wm->info.pchBuffer,
 508                          wm->info.pchNext - wm->info.pchBuffer, MMIO_PROC_32A);
 509         }
 510         if (uFlags & MMIO_EMPTYBUF)
 511             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 512     }
 513     wm->info.dwFlags &= ~MMIO_DIRTY;
 514
 515     return MMSYSERR_NOERROR;
 516 }
 517
 518 /***************************************************************************
 519  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 520  */
 521 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 522 {
 523     LONG        size = wm->info.cchBuffer;
 524
 525     TRACE("bo=%lx do=%lx of=%lx\n",
 526           wm->info.lBufOffset, wm->info.lDiskOffset,
 527           send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, MMIO_PROC_32A));
 528
 529     wm->info.lBufOffset = wm->info.lDiskOffset;
 530     wm->info.pchNext = wm->info.pchBuffer;
 531     wm->info.pchEndRead = wm->info.pchBuffer;
 532     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 533
 534     wm->bBufferLoaded = TRUE;
 535     if (for_read) {
 536         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 537                             (LPARAM)wm->info.pchBuffer, size, MMIO_PROC_32A);
 538         if (size > 0)
 539             wm->info.pchEndRead += size;
 540         else
 541             wm->bBufferLoaded = FALSE;
 542     }
 543
 544     return size;
 545 }
 546
 547 /***************************************************************************
 548  *                      MMIO_SetBuffer                          [INTERNAL]
 549  */
 550 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 551                                UINT uFlags)
 552 {
 553     TRACE("(%p %p %ld %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 554
 555     if (uFlags)                 return MMSYSERR_INVALPARAM;
 556     if (cchBuffer > 0xFFFF)
 557         WARN("Untested handling of huge mmio buffers (%ld >= 64k)\n", cchBuffer);
 558
 559     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 560         return MMIOERR_CANNOTWRITE;
 561
 562     /* free previous buffer if allocated */
 563     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 564         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 565         wm->info.pchBuffer = NULL;
 566         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 567     }
 568
 569     if (pchBuffer) {
 570         wm->info.pchBuffer = pchBuffer;
 571     } else if (cchBuffer) {
 572         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 573             return MMIOERR_OUTOFMEMORY;
 574         wm->info.dwFlags |= MMIO_ALLOCBUF;
 575     } else {
 576         wm->info.pchBuffer = NULL;
 577     }
 578
 579     wm->info.cchBuffer = cchBuffer;
 580     wm->info.pchNext = wm->info.pchBuffer;
 581     wm->info.pchEndRead = wm->info.pchBuffer;
 582     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 583     wm->info.lBufOffset = 0;
 584     wm->bBufferLoaded = FALSE;
 585
 586     return MMSYSERR_NOERROR;
 587 }
 588
 589 /**************************************************************************
 590  *                      MMIO_Open                               [internal]
 591  */
 592 HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags,
 593                 enum mmioProcType type)
 594 {
 595     LPWINE_MMIO         wm;
 596     MMIOINFO            mmioinfo;
 597
 598     TRACE("('%s', %p, %08lX, %d);\n", szFileName, refmminfo, dwOpenFlags, type);
 599
 600     if (!refmminfo) {
 601         refmminfo = &mmioinfo;
 602
 603         mmioinfo.fccIOProc = 0;
 604         mmioinfo.pIOProc = NULL;
 605         mmioinfo.pchBuffer = NULL;
 606         mmioinfo.cchBuffer = 0;
 607         type = MMIO_PROC_32A;
 608     }
 609
 610     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 611         char    buffer[MAX_PATH];
 612
 613         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 614             return (HMMIO16)FALSE;
 615         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 616             return (HMMIO)FALSE;
 617         strcpy(szFileName, buffer);
 618         return (HMMIO)TRUE;
 619     }
 620
 621     if ((wm = MMIO_Create()) == NULL)
 622         return 0;
 623
 624     /* If both params are NULL, then parse the file name if available */
 625     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 626         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 627         /* Handle any unhandled/error case. Assume DOS file */
 628         if (wm->info.fccIOProc == 0)
 629             wm->info.fccIOProc = FOURCC_DOS;
 630         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 631         wm->bTmpIOProc = FALSE;
 632     }
 633     /* if just the four character code is present, look up IO proc */
 634     else if (refmminfo->pIOProc == NULL) {
 635         wm->info.fccIOProc = refmminfo->fccIOProc;
 636         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 637         wm->bTmpIOProc = FALSE;
 638     }
 639     /* if IO proc specified, use it and specified four character code */
 640     else {
 641         wm->info.fccIOProc = refmminfo->fccIOProc;
 642         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 643                            MMIO_INSTALLPROC, type);
 644         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 645         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 646         wm->bTmpIOProc = TRUE;
 647     }
 648
 649     wm->bBufferLoaded = FALSE;
 650     wm->ioProc->count++;
 651
 652     if (dwOpenFlags & MMIO_ALLOCBUF) {
 653         if ((refmminfo->wErrorRet = MMIO_SetBuffer(wm, NULL, MMIO_DEFAULTBUFFER, 0)))
 654             goto error1;
 655     } else if (wm->info.fccIOProc == FOURCC_MEM) {
 656         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 657         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 658             goto error1;
 659         wm->bBufferLoaded = TRUE;
 660     } /* else => unbuffered, wm->info.pchBuffer == NULL */
 661
 662     /* see mmioDosIOProc for that one */
 663     wm->info.adwInfo[0] = refmminfo->adwInfo[0];
 664     wm->info.dwFlags = dwOpenFlags;
 665
 666     /* call IO proc to actually open file */
 667     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 668                                         (LPARAM)szFileName, 0, MMIO_PROC_32A);
 669
 670     /* grab file size, when possible */
 671     wm->dwFileSize = GetFileSize((HANDLE)wm->info.adwInfo[0], NULL);
 672
 673     if (refmminfo->wErrorRet == 0)
 674         return wm->info.hmmio;
 675  error1:
 676     if (wm->ioProc) wm->ioProc->count--;
 677  error2:
 678     MMIO_Destroy(wm);
 679     return 0;
 680 }
 681
 682 /**************************************************************************
 683  *                              mmioOpenW                       [WINMM.@]
 684  */
 685 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 686                        DWORD dwOpenFlags)
 687 {
 688     HMMIO       ret;
 689     LPSTR       szFn = NULL;
 690
 691     if (szFileName)
 692     {
 693         INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
 694         szFn = HeapAlloc( GetProcessHeap(), 0, len );
 695         if (!szFn) return (HMMIO)NULL;
 696         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
 697     }
 698
 699     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, MMIO_PROC_32W);
 700
 701     HeapFree(GetProcessHeap(), 0, szFn);
 702     return ret;
 703 }
 704
 705 /**************************************************************************
 706  *                              mmioOpenA                       [WINMM.@]
 707  */
 708 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 709                        DWORD dwOpenFlags)
 710 {
 711     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, MMIO_PROC_32A);
 712 }
 713
 714 /**************************************************************************
 715  *                              mmioClose               [WINMM.@]
 716  */
 717 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 718 {
 719     LPWINE_MMIO wm;
 720     MMRESULT    result;
 721
 722     TRACE("(%p, %04X);\n", hmmio, uFlags);
 723
 724     if ((wm = MMIO_Get(hmmio)) == NULL)
 725         return MMSYSERR_INVALHANDLE;
 726
 727     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 728         return result;
 729
 730     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE,
 731                           uFlags, 0, MMIO_PROC_32A);
 732
 733     MMIO_SetBuffer(wm, NULL, 0, 0);
 734
 735     wm->ioProc->count--;
 736
 737     if (wm->bTmpIOProc)
 738         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 739                            MMIO_REMOVEPROC, wm->ioProc->type);
 740
 741     MMIO_Destroy(wm);
 742
 743     return result;
 744 }
 745
 746 /**************************************************************************
 747  *                              mmioRead                [WINMM.@]
 748  */
 749 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 750 {
 751     LPWINE_MMIO wm;
 752     LONG        count;
 753
 754     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 755
 756     if ((wm = MMIO_Get(hmmio)) == NULL)
 757         return -1;
 758
 759     /* unbuffered case first */
 760     if (!wm->info.pchBuffer)
 761         return send_message(wm->ioProc, &wm->info, MMIOM_READ,
 762                             (LPARAM)pch, cch, MMIO_PROC_32A);
 763
 764     /* first try from current buffer */
 765     if (wm->info.pchNext != wm->info.pchEndRead) {
 766         count = wm->info.pchEndRead - wm->info.pchNext;
 767         if (count > cch || count < 0) count = cch;
 768         memcpy(pch, wm->info.pchNext, count);
 769         wm->info.pchNext += count;
 770         pch += count;
 771         cch -= count;
 772     } else
 773         count = 0;
 774
 775     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 776         assert(wm->info.cchBuffer);
 777
 778         while (cch) {
 779             LONG size;
 780
 781             size = MMIO_GrabNextBuffer(wm, TRUE);
 782             if (size <= 0) break;
 783             if (size > cch) size = cch;
 784             memcpy(pch, wm->info.pchBuffer, size);
 785             wm->info.pchNext += size;
 786             pch += size;
 787             cch -= size;
 788             count += size;
 789         }
 790     }
 791
 792     TRACE("count=%ld\n", count);
 793     return count;
 794 }
 795
 796 /**************************************************************************
 797  *                              mmioWrite               [WINMM.@]
 798  */
 799 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 800 {
 801     LPWINE_MMIO wm;
 802     LONG        count;
 803
 804     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 805
 806     if ((wm = MMIO_Get(hmmio)) == NULL)
 807         return -1;
 808
 809     if (wm->info.cchBuffer) {
 810         LONG    bytesW = 0;
 811
 812         count = 0;
 813         while (cch) {
 814             if (wm->info.pchNext != wm->info.pchEndWrite) {
 815                 count = wm->info.pchEndWrite - wm->info.pchNext;
 816                 if (count > cch || count < 0) count = cch;
 817                 memcpy(wm->info.pchNext, pch, count);
 818                 wm->info.pchNext += count;
 819                 pch += count;
 820                 cch -= count;
 821                 bytesW += count;
 822                 wm->info.dwFlags |= MMIO_DIRTY;
 823             } else {
 824                 if (wm->info.fccIOProc == FOURCC_MEM) {
 825                     if (wm->info.adwInfo[0]) {
 826                         /* from where would we get the memory handle? */
 827                         FIXME("memory file expansion not implemented!\n");
 828                         break;
 829                     } else break;
 830                 }
 831             }
 832
 833             if (wm->info.pchNext == wm->info.pchEndWrite)
 834             {
 835                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 836                 MMIO_GrabNextBuffer(wm, FALSE);
 837             }
 838             else break;
 839         }
 840         count = bytesW;
 841     } else {
 842         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 843                              (LPARAM)pch, cch, MMIO_PROC_32A);
 844         wm->info.lBufOffset = wm->info.lDiskOffset;
 845     }
 846
 847     TRACE("bytes written=%ld\n", count);
 848     return count;
 849 }
 850
 851 /**************************************************************************
 852  *                              mmioSeek                [WINMM.@]
 853  */
 854 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 855 {
 856     LPWINE_MMIO wm;
 857     LONG        offset;
 858
 859     TRACE("(%p, %08lX, %d);\n", hmmio, lOffset, iOrigin);
 860
 861     if ((wm = MMIO_Get(hmmio)) == NULL)
 862         return MMSYSERR_INVALHANDLE;
 863
 864     /* not buffered, direct seek on file */
 865     if (!wm->info.pchBuffer)
 866         return send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 867                             lOffset, iOrigin, MMIO_PROC_32A);
 868
 869     switch (iOrigin) {
 870     case SEEK_SET:
 871         offset = lOffset;
 872         break;
 873     case SEEK_CUR:
 874         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 875         break;
 876     case SEEK_END:
 877         offset = ((wm->info.fccIOProc == FOURCC_MEM)? wm->info.cchBuffer : wm->dwFileSize) - lOffset;
 878         break;
 879     default:
 880         return -1;
 881     }
 882
 883     if (offset && offset >= wm->dwFileSize && wm->info.fccIOProc != FOURCC_MEM) {
 884         /* should check that write mode exists */
 885         if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 886             return -1;
 887         wm->info.lBufOffset = offset;
 888         wm->info.pchEndRead = wm->info.pchBuffer;
 889         wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 890         if ((wm->info.dwFlags & MMIO_RWMODE) == MMIO_READ) {
 891             wm->info.lDiskOffset = wm->dwFileSize;
 892         }
 893     } else if ((wm->info.cchBuffer > 0) &&
 894         ((offset < wm->info.lBufOffset) ||
 895          (offset >= wm->info.lBufOffset + wm->info.cchBuffer) ||
 896          !wm->bBufferLoaded)) {
 897         /* stay in same buffer ? */
 898         /* some memory mapped buffers are defined with -1 as a size */
 899
 900         /* condition to change buffer */
 901         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 902             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 903             /* this also sets the wm->info.lDiskOffset field */
 904             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 905                          (offset / wm->info.cchBuffer) * wm->info.cchBuffer,
 906                          SEEK_SET, MMIO_PROC_32A) == -1)
 907             return -1;
 908         MMIO_GrabNextBuffer(wm, TRUE);
 909     }
 910
 911     wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 912
 913     TRACE("=> %ld\n", offset);
 914     return offset;
 915 }
 916
 917 /**************************************************************************
 918  *                              mmioGetInfo             [WINMM.@]
 919  */
 920 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 921 {
 922     LPWINE_MMIO         wm;
 923
 924     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 925
 926     if ((wm = MMIO_Get(hmmio)) == NULL)
 927         return MMSYSERR_INVALHANDLE;
 928
 929     memcpy(lpmmioinfo, &wm->info, sizeof(MMIOINFO));
 930     /* don't expose 16 bit ioproc:s */
 931     if (wm->ioProc->type != MMIO_PROC_16)
 932         lpmmioinfo->pIOProc = wm->ioProc->pIOProc;
 933
 934     return MMSYSERR_NOERROR;
 935 }
 936
 937 /**************************************************************************
 938  *                              mmioSetInfo             [WINMM.@]
 939  */
 940 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 941 {
 942     LPWINE_MMIO         wm;
 943
 944     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 945
 946     if ((wm = MMIO_Get(hmmio)) == NULL)
 947         return MMSYSERR_INVALHANDLE;
 948
 949     /* check pointers coherence */
 950     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 951         lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 952         lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 953         lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 954         lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 955         lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 956         return MMSYSERR_INVALPARAM;
 957
 958     wm->info.pchNext = lpmmioinfo->pchNext;
 959     wm->info.pchEndRead = lpmmioinfo->pchEndRead;
 960
 961     return MMSYSERR_NOERROR;
 962 }
 963
 964 /**************************************************************************
 965 *                               mmioSetBuffer           [WINMM.@]
 966 */
 967 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 968 {
 969     LPWINE_MMIO         wm;
 970
 971     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%ld, uFlags=%#08x)\n",
 972           hmmio, pchBuffer, cchBuffer, uFlags);
 973
 974     if ((wm = MMIO_Get(hmmio)) == NULL)
 975         return MMSYSERR_INVALHANDLE;
 976
 977     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 978 }
 979
 980 /**************************************************************************
 981  *                              mmioFlush               [WINMM.@]
 982  */
 983 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 984 {
 985     LPWINE_MMIO         wm;
 986
 987     TRACE("(%p, %04X)\n", hmmio, uFlags);
 988
 989     if ((wm = MMIO_Get(hmmio)) == NULL)
 990         return MMSYSERR_INVALHANDLE;
 991
 992     return MMIO_Flush(wm, uFlags);
 993 }
 994
 995 /**************************************************************************
 996  *                              mmioAdvance             [WINMM.@]
 997  */
 998 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 999 {
1000     LPWINE_MMIO         wm;
1001
1002     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
1003
1004     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1005      * here. be sure if you change something here to check mmioAdvance16 as well
1006      */
1007     if ((wm = MMIO_Get(hmmio)) == NULL)
1008         return MMSYSERR_INVALHANDLE;
1009
1010     if (!wm->info.cchBuffer)
1011         return MMIOERR_UNBUFFERED;
1012
1013     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1014         return MMSYSERR_INVALPARAM;
1015
1016     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1017     {
1018         send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
1019                      lpmmioinfo->lBufOffset, SEEK_SET, MMIO_PROC_32A);
1020         send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
1021                      (LPARAM)lpmmioinfo->pchBuffer,
1022                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, MMIO_PROC_32A);
1023         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1024     }
1025     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1026         return MMIOERR_CANNOTWRITE;
1027
1028     if (lpmmioinfo) {
1029         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1030                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1031     }
1032     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1033
1034     if (lpmmioinfo) {
1035         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1036         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1037             (wm->info.pchEndRead - wm->info.pchBuffer);
1038         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1039             (wm->info.pchEndWrite - wm->info.pchBuffer);
1040         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1041         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1042     }
1043     return MMSYSERR_NOERROR;
1044 }
1045
1046 /**************************************************************************
1047  *                              mmioStringToFOURCCA     [WINMM.@]
1048  */
1049 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1050 {
1051     CHAR cc[4];
1052     int i = 0;
1053
1054     for (i = 0; i < 4 && sz[i]; i++) {
1055         if (uFlags & MMIO_TOUPPER) {
1056             cc[i] = toupper(sz[i]);
1057         } else {
1058             cc[i] = sz[i];
1059         }
1060     }
1061
1062     /* Pad with spaces */
1063     while (i < 4) cc[i++] = ' ';
1064
1065     TRACE("Got '%.4s'\n",cc);
1066     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1067 }
1068
1069 /**************************************************************************
1070  *                              mmioStringToFOURCCW     [WINMM.@]
1071  */
1072 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1073 {
1074     char        szA[4];
1075
1076     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1077     return mmioStringToFOURCCA(szA,uFlags);
1078 }
1079
1080 /**************************************************************************
1081  *                              mmioInstallIOProcA         [WINMM.@]
1082  */
1083 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1084                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1085 {
1086     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32A);
1087 }
1088
1089 /**************************************************************************
1090  *                              mmioInstallIOProcW         [WINMM.@]
1091  */
1092 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1093                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1094 {
1095     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32W);
1096 }
1097
1098 /******************************************************************
1099  *              MMIO_SendMessage
1100  *
1101  *
1102  */
1103 LRESULT         MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1104                                  LPARAM lParam2, enum mmioProcType type)
1105 {
1106     LPWINE_MMIO         wm;
1107
1108     TRACE("(%p, %u, %ld, %ld, %d)\n", hmmio, uMessage, lParam1, lParam2, type);
1109
1110     if (uMessage < MMIOM_USER)
1111         return MMSYSERR_INVALPARAM;
1112
1113     if ((wm = MMIO_Get(hmmio)) == NULL)
1114         return MMSYSERR_INVALHANDLE;
1115
1116     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, type);
1117 }
1118
1119 /**************************************************************************
1120  *                              mmioSendMessage         [WINMM.@]
1121  */
1122 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1123                                LPARAM lParam1, LPARAM lParam2)
1124 {
1125     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, MMIO_PROC_32A);
1126 }
1127
1128 /**************************************************************************
1129  *                              mmioDescend             [WINMM.@]
1130  */
1131 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1132                             const MMCKINFO* lpckParent, UINT uFlags)
1133 {
1134     DWORD               dwOldPos;
1135     FOURCC              srchCkId;
1136     FOURCC              srchType;
1137
1138
1139     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1140
1141     if (lpck == NULL)
1142         return MMSYSERR_INVALPARAM;
1143
1144     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1145     TRACE("dwOldPos=%ld\n", dwOldPos);
1146
1147     if (lpckParent != NULL) {
1148         TRACE("seek inside parent at %ld !\n", lpckParent->dwDataOffset);
1149         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1150         if (dwOldPos < lpckParent->dwDataOffset ||
1151             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1152             WARN("outside parent chunk\n");
1153             return MMIOERR_CHUNKNOTFOUND;
1154         }
1155     }
1156
1157     /* The SDK docu says 'ckid' is used for all cases. Real World
1158      * examples disagree -Marcus,990216.
1159      */
1160
1161     srchType = 0;
1162     /* find_chunk looks for 'ckid' */
1163     if (uFlags & MMIO_FINDCHUNK)
1164         srchCkId = lpck->ckid;
1165     /* find_riff and find_list look for 'fccType' */
1166     if (uFlags & MMIO_FINDLIST) {
1167         srchCkId = FOURCC_LIST;
1168         srchType = lpck->fccType;
1169     }
1170     if (uFlags & MMIO_FINDRIFF) {
1171         srchCkId = FOURCC_RIFF;
1172         srchType = lpck->fccType;
1173     }
1174
1175     if (uFlags & (MMIO_FINDCHUNK|MMIO_FINDLIST|MMIO_FINDRIFF)) {
1176         TRACE("searching for %.4s.%.4s\n",
1177               (LPSTR)&srchCkId,
1178               srchType?(LPSTR)&srchType:"any ");
1179
1180         while (TRUE) {
1181             LONG ix;
1182
1183             ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1184             if (ix < 2*sizeof(DWORD)) {
1185                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1186                 WARN("return ChunkNotFound\n");
1187                 return MMIOERR_CHUNKNOTFOUND;
1188             }
1189             lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1190             if (ix < lpck->dwDataOffset - dwOldPos) {
1191                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1192                 WARN("return ChunkNotFound\n");
1193                 return MMIOERR_CHUNKNOTFOUND;
1194             }
1195             TRACE("ckid=%.4s fcc=%.4s cksize=%08lX !\n",
1196                   (LPSTR)&lpck->ckid,
1197                   srchType?(LPSTR)&lpck->fccType:"<na>",
1198                   lpck->cksize);
1199             if ((srchCkId == lpck->ckid) &&
1200                 (!srchType || (srchType == lpck->fccType))
1201                 )
1202                 break;
1203
1204             dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1205             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1206         }
1207     } else {
1208         /* FIXME: unverified, does it do this? */
1209         /* NB: This part is used by WAVE_mciOpen, among others */
1210         if (mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD)) < 3 * sizeof(DWORD)) {
1211             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1212             WARN("return ChunkNotFound 2nd\n");
1213             return MMIOERR_CHUNKNOTFOUND;
1214         }
1215         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1216     }
1217     lpck->dwFlags = 0;
1218     /* If we were looking for RIFF/LIST chunks, the final file position
1219      * is after the chunkid. If we were just looking for the chunk
1220      * it is after the cksize. So add 4 in RIFF/LIST case.
1221      */
1222     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1223         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1224     else
1225         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1226     TRACE("lpck: ckid=%.4s, cksize=%ld, dwDataOffset=%ld fccType=%08lX (%.4s)!\n",
1227           (LPSTR)&lpck->ckid, lpck->cksize, lpck->dwDataOffset,
1228           lpck->fccType, srchType?(LPSTR)&lpck->fccType:"");
1229     return MMSYSERR_NOERROR;
1230 }
1231
1232 /**************************************************************************
1233  *                              mmioAscend              [WINMM.@]
1234  */
1235 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1236 {
1237     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1238
1239     if (lpck->dwFlags & MMIO_DIRTY) {
1240         DWORD   dwOldPos, dwNewSize;
1241
1242         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1243         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1244         TRACE("dwOldPos=%ld lpck->dwDataOffset = %ld\n", dwOldPos, lpck->dwDataOffset);
1245         dwNewSize = dwOldPos - lpck->dwDataOffset;
1246         if (dwNewSize != lpck->cksize) {
1247             TRACE("Nope: lpck->cksize=%ld dwNewSize=%ld\n", lpck->cksize, dwNewSize);
1248             lpck->cksize = dwNewSize;
1249
1250             /* pad odd size with 0 */
1251             if (dwNewSize & 1) {
1252                 char ch = 0;
1253                 mmioWrite(hmmio, &ch, 1);
1254             }
1255             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1256             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1257         }
1258         lpck->dwFlags = 0;
1259     }
1260
1261     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1262
1263     return MMSYSERR_NOERROR;
1264 }
1265
1266 /**************************************************************************
1267  *                      mmioCreateChunk                         [WINMM.@]
1268  */
1269 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1270 {
1271     DWORD       dwOldPos;
1272     LONG        size;
1273     LONG        ix;
1274
1275     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1276
1277     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1278     TRACE("dwOldPos=%ld\n", dwOldPos);
1279
1280     if (uFlags == MMIO_CREATELIST)
1281         lpck->ckid = FOURCC_LIST;
1282     else if (uFlags == MMIO_CREATERIFF)
1283         lpck->ckid = FOURCC_RIFF;
1284
1285     TRACE("ckid=%.4s\n", (LPSTR)&lpck->ckid);
1286
1287     size = 2 * sizeof(DWORD);
1288     lpck->dwDataOffset = dwOldPos + size;
1289
1290     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1291         size += sizeof(DWORD);
1292     lpck->dwFlags = MMIO_DIRTY;
1293
1294     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1295     TRACE("after mmioWrite ix = %ld req = %ld, errno = %d\n",ix, size, errno);
1296     if (ix < size) {
1297         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1298         WARN("return CannotWrite\n");
1299         return MMIOERR_CANNOTWRITE;
1300     }
1301
1302     return MMSYSERR_NOERROR;
1303 }
1304
1305 /**************************************************************************
1306  *                              mmioRenameA                     [WINMM.@]
1307  */
1308 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1309                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1310 {
1311     struct IOProcList*  ioProc = NULL;
1312     struct IOProcList   tmp;
1313     FOURCC              fcc;
1314
1315     TRACE("('%s', '%s', %p, %08lX);\n",
1316           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1317
1318     /* If both params are NULL, then parse the file name */
1319     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1320     {
1321         fcc = MMIO_ParseExtA(szFileName);
1322         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1323     }
1324
1325     /* Handle any unhandled/error case from above. Assume DOS file */
1326     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1327         ioProc = MMIO_FindProcNode(FOURCC_DOS);
1328     /* if just the four character code is present, look up IO proc */
1329     else if (lpmmioinfo->pIOProc == NULL)
1330         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1331     else /* use relevant ioProc */
1332     {
1333         ioProc = &tmp;
1334         tmp.fourCC = lpmmioinfo->fccIOProc;
1335         tmp.pIOProc = lpmmioinfo->pIOProc;
1336         tmp.type = MMIO_PROC_32A;
1337         tmp.count = 1;
1338     }
1339
1340     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1341      * or make a copy of it because it's const ???
1342      */
1343     return send_message(ioProc, (LPMMIOINFO)lpmmioinfo, MMIOM_RENAME,
1344                         (LPARAM)szFileName, (LPARAM)szNewFileName, MMIO_PROC_32A);
1345 }
1346
1347 /**************************************************************************
1348  *                              mmioRenameW                     [WINMM.@]
1349  */
1350 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1351                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1352 {
1353     LPSTR       szFn = NULL;
1354     LPSTR       sznFn = NULL;
1355     UINT        ret;
1356     INT         len;
1357
1358     if (szFileName)
1359     {
1360         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1361         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1362         if (!szFn) return MMSYSERR_NOMEM;
1363         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1364     }
1365     if (szNewFileName)
1366     {
1367         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1368         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1369         if (!sznFn) return MMSYSERR_NOMEM;
1370         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1371     }
1372
1373     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1374
1375     HeapFree(GetProcessHeap(),0,szFn);
1376     HeapFree(GetProcessHeap(),0,sznFn);
1377     return ret;
1378 }