dlls/winmm/mmio.c

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