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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /* Still to be done:
  24  *      + correct handling of global/local IOProcs (and temporary IOProcs)
  25  *      + mode of mmio objects is not used (read vs write vs readwrite)
  26  *      + thread safeness
  27  *      + 32 A <=> W message mapping
  28  */
  29
  30
  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 "winternl.h"
  42 #include "mmsystem.h"
  43 #include "winemm.h"
  44
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  48
  49 static WINE_MMIO *MMIOList;
  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] = OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
  81             }
  82             if (lpmmioinfo->adwInfo[0] == HFILE_ERROR)
  83                 ret = MMIOERR_FILENOTFOUND;
  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 position, -1 on error
 130          */
 131         if (lParam2 == SEEK_END)
 132             ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], -(LONG)lParam1, (LONG)lParam2);
 133         else
 134             ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 135         if (ret != -1)
 136             lpmmioinfo->lDiskOffset = ret;
 137         return ret;
 138
 139     case MMIOM_RENAME:
 140         /* Parameters:
 141          * lParam1 = old name
 142          * lParam2 = new name
 143          * Returns: zero on success, non-zero on failure
 144          */
 145          if (!MoveFileA((const char*)lParam1, (const char*)lParam2))
 146              ret = MMIOERR_FILENOTFOUND;
 147          break;
 148
 149     default:
 150         FIXME("unexpected message %u\n", uMessage);
 151         return 0;
 152     }
 153
 154     return ret;
 155 }
 156
 157 /**************************************************************************
 158  *                      mmioMemIOProc                           [internal]
 159  */
 160 static LRESULT CALLBACK mmioMemIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 161                                       LPARAM lParam1, LPARAM lParam2)
 162 {
 163     TRACE("(%p,0x%04x,0x%08lx,0x%08lx)\n", lpmmioinfo, uMessage, lParam1, lParam2);
 164
 165     switch (uMessage) {
 166
 167     case MMIOM_OPEN:
 168         /* Parameters:
 169          * lParam1 = filename (must be NULL)
 170          * lParam2 = reserved
 171          * Returns: zero on success, error code on error
 172          * NOTE: lDiskOffset automatically set to zero
 173          */
 174         /* FIXME: io proc shouldn't change it */
 175         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 176             lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 177         lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 178         return 0;
 179
 180     case MMIOM_CLOSE:
 181         /* Parameters:
 182          * lParam1 = wFlags parameter from mmioClose
 183          * lParam2 = unused
 184          * Returns: zero on success, error code on error
 185          */
 186         return 0;
 187
 188     case MMIOM_READ:
 189         /* Parameters:
 190          * lParam1 = huge pointer to read buffer
 191          * lParam2 = number of bytes to read
 192          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 193          *         in wErrorRet)
 194          * NOTE: lDiskOffset should be updated
 195          */
 196         FIXME("MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 197         return 0;
 198
 199     case MMIOM_WRITE:
 200     case MMIOM_WRITEFLUSH:
 201         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 202
 203         /* Parameters:
 204          * lParam1 = huge pointer to write buffer
 205          * lParam2 = number of bytes to write
 206          * Returns: number of bytes written, -1 for error (error code in
 207          *              wErrorRet)
 208          * NOTE: lDiskOffset should be updated
 209          */
 210         FIXME("MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 211         return 0;
 212
 213     case MMIOM_SEEK:
 214         /* Parameters:
 215          * lParam1 = new position
 216          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 217          * Returns: new file position, -1 on error
 218          * NOTE: lDiskOffset should be updated
 219          */
 220         FIXME("MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 221         return -1;
 222
 223     default:
 224         FIXME("unexpected message %u\n", uMessage);
 225         return 0;
 226     }
 227 }
 228
 229 /* This array will be the entire list for most apps
 230  * Note that temporary ioProcs will be stored with a 0 fourCC code
 231  */
 232
 233 static struct IOProcList defaultProcs[] = {
 234     {&defaultProcs[1], FOURCC_DOS, (LPMMIOPROC)mmioDosIOProc, FALSE, 0},
 235     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, FALSE, 0},
 236 };
 237
 238 static struct IOProcList*       pIOProcListAnchor = &defaultProcs[0];
 239
 240 /****************************************************************
 241  *              MMIO_FindProcNode                       [INTERNAL]
 242  *
 243  * Finds the ProcList node associated with a given FOURCC code.
 244  */
 245 static struct IOProcList*       MMIO_FindProcNode(FOURCC fccIOProc)
 246 {
 247     struct IOProcList*  pListNode;
 248
 249     for (pListNode = pIOProcListAnchor; pListNode; pListNode = pListNode->pNext) {
 250         if (pListNode->fourCC == fccIOProc) {
 251             return pListNode;
 252         }
 253     }
 254     return NULL;
 255 }
 256
 257 /****************************************************************
 258  *              MMIO_InstallIOProc                      [INTERNAL]
 259  */
 260 static LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 261                                      DWORD dwFlags, BOOL is_unicode)
 262 {
 263     LPMMIOPROC          lpProc = NULL;
 264     struct IOProcList*  pListNode;
 265     struct IOProcList** ppListNode;
 266
 267     TRACE("(%08x, %p, %08X, %s)\n", fccIOProc, pIOProc, dwFlags, is_unicode ? "unicode" : "ansi");
 268
 269     if (dwFlags & MMIO_GLOBALPROC)
 270         FIXME("Global procedures not implemented\n");
 271
 272     /* just handle the known procedures for now */
 273     switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 274     case MMIO_INSTALLPROC:
 275         /* Create new entry for the IOProc list */
 276         pListNode = HeapAlloc(GetProcessHeap(), 0, sizeof(*pListNode));
 277         if (pListNode) {
 278             /* Fill in this node */
 279             pListNode->fourCC = fccIOProc;
 280             pListNode->pIOProc = pIOProc;
 281             pListNode->is_unicode = is_unicode;
 282             pListNode->count = 0;
 283
 284             /* Stick it on the end of the list */
 285             pListNode->pNext = pIOProcListAnchor;
 286             pIOProcListAnchor = pListNode;
 287
 288             /* Return this IOProc - that's how the caller knows we succeeded */
 289             lpProc = pIOProc;
 290         }
 291         break;
 292
 293     case MMIO_REMOVEPROC:
 294         /*
 295          * Search for the node that we're trying to remove
 296          * We search for a matching fourCC code if it's non null, or the proc
 297          * address otherwise
 298          * note that this method won't find the first item on the list, but
 299          * since the first two items on this list are ones we won't
 300          * let the user delete anyway, that's okay
 301          */
 302         ppListNode = &pIOProcListAnchor;
 303         while ((*ppListNode) &&
 304                ((fccIOProc != 0) ?
 305                 (*ppListNode)->fourCC != fccIOProc :
 306                 (*ppListNode)->pIOProc != pIOProc))
 307             ppListNode = &((*ppListNode)->pNext);
 308
 309         if (*ppListNode) { /* found it */
 310             /* FIXME: what should be done if an open mmio object uses this proc ?
 311              * shall we return an error, nuke the mmio object ?
 312              */
 313             if ((*ppListNode)->count) {
 314                 ERR("Cannot remove a mmIOProc while in use\n");
 315                 break;
 316             }
 317             /* remove it, but only if it isn't builtin */
 318             if ((*ppListNode) >= defaultProcs &&
 319                 (*ppListNode) < defaultProcs + ARRAY_SIZE(defaultProcs)) {
 320                 WARN("Tried to remove built-in mmio proc. Skipping\n");
 321             } else {
 322                 /* Okay, nuke it */
 323                 struct IOProcList*  ptmpNode = *ppListNode;
 324                 lpProc = (*ppListNode)->pIOProc;
 325                 *ppListNode = (*ppListNode)->pNext;
 326                 HeapFree(GetProcessHeap(), 0, ptmpNode);
 327             }
 328         }
 329         break;
 330
 331     case MMIO_FINDPROC:
 332         if ((pListNode = MMIO_FindProcNode(fccIOProc))) {
 333             lpProc = pListNode->pIOProc;
 334         }
 335         break;
 336     }
 337
 338     return lpProc;
 339 }
 340
 341 /****************************************************************
 342  *              send_message                            [INTERNAL]
 343  */
 344 static LRESULT  send_message(struct IOProcList* ioProc, LPMMIOINFO mmioinfo,
 345                              DWORD wMsg, LPARAM lParam1,
 346                              LPARAM lParam2, BOOL is_unicode)
 347 {
 348     LRESULT             result = MMSYSERR_ERROR;
 349     LPARAM              lp1 = lParam1, lp2 = lParam2;
 350
 351     if (!ioProc) {
 352         ERR("ioProc NULL\n");
 353         return MMSYSERR_INVALPARAM;
 354     }
 355
 356     if (ioProc->is_unicode != is_unicode) {
 357         /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 358         FIXME("NIY 32 A<=>W mapping\n");
 359     }
 360     result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 361
 362 #if 0
 363     if (ioProc->is_unicode != is_unicode) {
 364             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 365         }
 366 #endif
 367
 368     return result;
 369 }
 370
 371 /**************************************************************************
 372  *                              MMIO_ParseExtA                  [internal]
 373  *
 374  * Parses a filename for the extension.
 375  *
 376  * RETURNS
 377  *  The FOURCC code for the extension if found, else 0.
 378  */
 379 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 380 {
 381     /* Filenames are of the form file.ext{+ABC}
 382        For now, we take the last '+' if present */
 383
 384     FOURCC ret = 0;
 385
 386     /* Note that ext{Start,End} point to the . and + respectively */
 387     LPCSTR extEnd;
 388     LPCSTR extStart;
 389
 390     CHAR ext[5];
 391
 392     TRACE("(%s)\n", debugstr_a(szFileName));
 393
 394     if (!szFileName)
 395         return ret;
 396
 397     /* Find the last '+' */
 398     extEnd = strrchr(szFileName,'+');
 399
 400     if (!extEnd) {
 401          /* No + so just an extension */
 402          return ret;
 403     } else {
 404         /* Find the first '.' before '+' */
 405         extStart = extEnd - 1;
 406         while (extStart >= szFileName && *extStart != '.') {
 407             extStart--;
 408         }
 409         if (extStart < szFileName) {
 410             ERR("No extension in szFileName: %s\n", debugstr_a(szFileName));
 411             return ret;
 412         }
 413     }
 414
 415     if (extEnd - extStart - 1 > 4)
 416         WARN("Extension length > 4\n");
 417     lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 418
 419     TRACE("Got extension: %s\n", debugstr_a(ext));
 420
 421     /* FOURCC codes identifying file-extensions must be uppercase */
 422     ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 423
 424     return ret;
 425 }
 426
 427 /**************************************************************************
 428  *                              MMIO_Get                        [internal]
 429  *
 430  * Retrieves the mmio object from current process
 431  */
 432 static LPWINE_MMIO      MMIO_Get(HMMIO h)
 433 {
 434     LPWINE_MMIO         wm = NULL;
 435
 436     EnterCriticalSection(&WINMM_cs);
 437     for (wm = MMIOList; wm; wm = wm->lpNext) {
 438         if (wm->info.hmmio == h)
 439             break;
 440     }
 441     LeaveCriticalSection(&WINMM_cs);
 442     return wm;
 443 }
 444
 445 /**************************************************************************
 446  *                              MMIO_Create                     [internal]
 447  *
 448  * Creates an internal representation for a mmio instance
 449  */
 450 static  LPWINE_MMIO             MMIO_Create(void)
 451 {
 452     static      WORD    MMIO_counter = 0;
 453     LPWINE_MMIO         wm;
 454
 455     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 456     if (wm) {
 457         EnterCriticalSection(&WINMM_cs);
 458         /* lookup next unallocated WORD handle, with a non NULL value */
 459         while (++MMIO_counter == 0 || MMIO_Get((HMMIO)(ULONG_PTR)MMIO_counter));
 460         wm->info.hmmio = (HMMIO)(ULONG_PTR)MMIO_counter;
 461         wm->lpNext = MMIOList;
 462         MMIOList = wm;
 463         LeaveCriticalSection(&WINMM_cs);
 464     }
 465     return wm;
 466 }
 467
 468 /**************************************************************************
 469  *                              MMIO_Destroy                    [internal]
 470  *-
 471  * Destroys an internal representation for a mmio instance
 472  */
 473 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 474 {
 475     LPWINE_MMIO*        m;
 476
 477     EnterCriticalSection(&WINMM_cs);
 478     /* search for the matching one... */
 479     m = &MMIOList;
 480     while (*m && *m != wm) m = &(*m)->lpNext;
 481     /* ...and destroy */
 482     if (*m) {
 483         *m = (*m)->lpNext;
 484         HeapFree(GetProcessHeap(), 0, wm);
 485         wm = NULL;
 486     }
 487     LeaveCriticalSection(&WINMM_cs);
 488     return !wm;
 489 }
 490
 491 /****************************************************************
 492  *                      MMIO_Flush                      [INTERNAL]
 493  */
 494 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 495 {
 496     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 497         /* not quite sure what to do here, but I'll guess */
 498         if (wm->info.dwFlags & MMIO_DIRTY) {
 499             /* FIXME: error handling */
 500             send_message(wm->ioProc, &wm->info, MMIOM_SEEK, wm->info.lBufOffset, SEEK_SET, FALSE);
 501             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 502                          (LPARAM)wm->info.pchBuffer,
 503                          wm->info.pchNext - wm->info.pchBuffer, FALSE);
 504         }
 505         if (uFlags & MMIO_EMPTYBUF)
 506             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 507     }
 508     wm->info.dwFlags &= ~MMIO_DIRTY;
 509
 510     return MMSYSERR_NOERROR;
 511 }
 512
 513 /***************************************************************************
 514  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 515  */
 516 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 517 {
 518     LONG        size = wm->info.cchBuffer;
 519
 520     TRACE("bo=%x do=%x\n",
 521           wm->info.lBufOffset, wm->info.lDiskOffset);
 522
 523     wm->info.lBufOffset = wm->info.lDiskOffset;
 524     wm->info.pchNext = wm->info.pchBuffer;
 525     wm->info.pchEndRead = wm->info.pchBuffer;
 526     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 527
 528     wm->bBufferLoaded = TRUE;
 529     if (for_read) {
 530         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 531                             (LPARAM)wm->info.pchBuffer, size, FALSE);
 532         if (size > 0)
 533             wm->info.pchEndRead += size;
 534         else
 535             wm->bBufferLoaded = FALSE;
 536     }
 537
 538     return size;
 539 }
 540
 541 /***************************************************************************
 542  *                      MMIO_SetBuffer                          [INTERNAL]
 543  */
 544 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 545                                UINT uFlags)
 546 {
 547     TRACE("(%p %p %d %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 548
 549     if (cchBuffer > 0xFFFF)
 550         WARN("Untested handling of huge mmio buffers (%d >= 64k)\n", cchBuffer);
 551
 552     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 553         return MMIOERR_CANNOTWRITE;
 554
 555     /* free previous buffer if allocated */
 556     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 557         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 558         wm->info.pchBuffer = NULL;
 559         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 560     }
 561
 562     if (pchBuffer) {
 563         wm->info.pchBuffer = pchBuffer;
 564     } else if (cchBuffer) {
 565         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 566             return MMIOERR_OUTOFMEMORY;
 567         wm->info.dwFlags |= MMIO_ALLOCBUF;
 568     } else {
 569         wm->info.pchBuffer = NULL;
 570     }
 571
 572     wm->info.cchBuffer = cchBuffer;
 573     wm->info.pchNext = wm->info.pchBuffer;
 574     wm->info.pchEndRead = wm->info.pchBuffer;
 575     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 576     wm->info.lBufOffset = wm->info.lDiskOffset;
 577     wm->bBufferLoaded = (wm->info.fccIOProc == FOURCC_MEM);
 578
 579     return MMSYSERR_NOERROR;
 580 }
 581
 582 /**************************************************************************
 583  *                      MMIO_Open                               [internal]
 584  */
 585 static HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags, BOOL is_unicode)
 586 {
 587     LPWINE_MMIO         wm;
 588     MMIOINFO            mmioinfo;
 589     DWORD               pos;
 590
 591     TRACE("(%s, %p, %08X, %s);\n", debugstr_a(szFileName), refmminfo, dwOpenFlags, is_unicode ? "unicode" : "ansi");
 592
 593     if (!refmminfo) {
 594         refmminfo = &mmioinfo;
 595         memset(&mmioinfo, 0, sizeof(mmioinfo));
 596         is_unicode = FALSE;
 597     }
 598
 599     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 600         char    buffer[MAX_PATH];
 601
 602         if (!szFileName)
 603             return (HMMIO)FALSE;
 604         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 605             return (HMMIO)FALSE;
 606         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 607             return (HMMIO)FALSE;
 608         strcpy(szFileName, buffer);
 609         return (HMMIO)TRUE;
 610     }
 611
 612     if ((wm = MMIO_Create()) == NULL)
 613         return 0;
 614
 615     /* If both params are NULL, then parse the file name if available */
 616     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 617         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 618         /* Handle any unhandled/error case. Assume DOS file */
 619         if (wm->info.fccIOProc == 0) {
 620             wm->info.fccIOProc = FOURCC_DOS;
 621             wm->ioProc = &defaultProcs[0];
 622         }
 623         else if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) {
 624             /* If not found, assume DOS file */
 625             wm->ioProc = &defaultProcs[0];
 626         }
 627         wm->bTmpIOProc = FALSE;
 628     }
 629     /* if just the four character code is present, look up IO proc */
 630     else if (refmminfo->pIOProc == NULL) {
 631         wm->info.fccIOProc = refmminfo->fccIOProc;
 632         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 633         wm->bTmpIOProc = FALSE;
 634     }
 635     /* if IO proc specified, use it and specified four character code */
 636     else {
 637         wm->info.fccIOProc = refmminfo->fccIOProc;
 638         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 639                            MMIO_INSTALLPROC, is_unicode);
 640         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 641         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 642         wm->bTmpIOProc = TRUE;
 643     }
 644
 645     wm->ioProc->count++;
 646     wm->info.dwFlags = dwOpenFlags;
 647
 648     if (dwOpenFlags & MMIO_ALLOCBUF) {
 649         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer,
 650             refmminfo->cchBuffer ? refmminfo->cchBuffer : MMIO_DEFAULTBUFFER, 0);
 651         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 652             goto error1;
 653     } else {
 654         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 655         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 656             goto error1;
 657     }
 658
 659     /* see mmioDosIOProc for that one */
 660     memcpy( wm->info.adwInfo, refmminfo->adwInfo, sizeof(wm->info.adwInfo) );
 661
 662     /* call IO proc to actually open file */
 663     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 664                                         (LPARAM)szFileName, 0, FALSE);
 665
 666     /* update offsets and grab file size, when possible */
 667     if (wm->info.fccIOProc == FOURCC_DOS && (send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, FALSE)) != -1) {
 668        pos = wm->info.lBufOffset = wm->info.lDiskOffset;
 669        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_END, FALSE);
 670        wm->dwFileSize = wm->info.lDiskOffset;
 671        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, pos, SEEK_SET, FALSE);
 672     }
 673     else wm->dwFileSize = 0;
 674
 675     if (refmminfo->wErrorRet == 0)
 676         return wm->info.hmmio;
 677  error1:
 678     if (wm->info.dwFlags & MMIO_ALLOCBUF)
 679         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 680     if (wm->ioProc) wm->ioProc->count--;
 681  error2:
 682     MMIO_Destroy(wm);
 683     return 0;
 684 }
 685
 686 /**************************************************************************
 687  *                              mmioOpenW                       [WINMM.@]
 688  */
 689 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 690                        DWORD dwOpenFlags)
 691 {
 692     HMMIO       ret;
 693     LPSTR       szFn = NULL;
 694
 695     if (szFileName)
 696     {
 697         INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
 698         szFn = HeapAlloc( GetProcessHeap(), 0, len );
 699         if (!szFn) return NULL;
 700         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
 701     }
 702
 703     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, TRUE);
 704
 705     HeapFree(GetProcessHeap(), 0, szFn);
 706     return ret;
 707 }
 708
 709 /**************************************************************************
 710  *                              mmioOpenA                       [WINMM.@]
 711  */
 712 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 713                        DWORD dwOpenFlags)
 714 {
 715     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, FALSE);
 716 }
 717
 718 /**************************************************************************
 719  *                              mmioClose               [WINMM.@]
 720  */
 721 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 722 {
 723     LPWINE_MMIO wm;
 724     MMRESULT    result;
 725
 726     TRACE("(%p, %04X);\n", hmmio, uFlags);
 727
 728     if ((wm = MMIO_Get(hmmio)) == NULL)
 729         return MMSYSERR_INVALHANDLE;
 730
 731     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 732         return result;
 733
 734     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE, uFlags, 0, FALSE);
 735
 736     MMIO_SetBuffer(wm, NULL, 0, 0);
 737
 738     wm->ioProc->count--;
 739
 740     if (wm->bTmpIOProc)
 741         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 742                            MMIO_REMOVEPROC, wm->ioProc->is_unicode);
 743
 744     MMIO_Destroy(wm);
 745
 746     return result;
 747 }
 748
 749 /**************************************************************************
 750  *                              mmioRead                [WINMM.@]
 751  */
 752 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 753 {
 754     LPWINE_MMIO wm;
 755     LONG        count;
 756
 757     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 758
 759     if ((wm = MMIO_Get(hmmio)) == NULL)
 760         return -1;
 761
 762     /* unbuffered case first */
 763     if (!wm->info.pchBuffer)
 764         return send_message(wm->ioProc, &wm->info, MMIOM_READ, (LPARAM)pch, cch, FALSE);
 765
 766     /* first try from current buffer */
 767     if (cch && wm->info.fccIOProc != FOURCC_MEM && wm->info.pchNext == wm->info.pchEndRead)
 768         MMIO_GrabNextBuffer(wm, TRUE);
 769     if (wm->info.pchNext != wm->info.pchEndRead) {
 770         count = wm->info.pchEndRead - wm->info.pchNext;
 771         if (count > cch || count < 0) count = cch;
 772         memcpy(pch, wm->info.pchNext, count);
 773         wm->info.pchNext += count;
 774         pch += count;
 775         cch -= count;
 776     } else
 777         count = 0;
 778
 779     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 780         assert(wm->info.cchBuffer);
 781
 782         while (cch) {
 783             LONG size;
 784
 785             size = MMIO_GrabNextBuffer(wm, TRUE);
 786             if (size <= 0) break;
 787             if (size > cch) size = cch;
 788             memcpy(pch, wm->info.pchBuffer, size);
 789             wm->info.pchNext += size;
 790             pch += size;
 791             cch -= size;
 792             count += size;
 793         }
 794         wm->bBufferLoaded = FALSE;
 795         mmioSeek(hmmio, 0, SEEK_CUR);
 796     }
 797
 798     TRACE("count=%d\n", count);
 799     return count;
 800 }
 801
 802 /**************************************************************************
 803  *                              mmioWrite               [WINMM.@]
 804  */
 805 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 806 {
 807     LPWINE_MMIO wm;
 808     LONG        count;
 809
 810     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 811
 812     if ((wm = MMIO_Get(hmmio)) == NULL)
 813         return -1;
 814
 815     if (wm->info.cchBuffer) {
 816         LONG    bytesW = 0;
 817
 818         while (cch) {
 819             if (wm->info.pchNext != wm->info.pchEndWrite) {
 820                 count = wm->info.pchEndWrite - wm->info.pchNext;
 821                 if (count > cch || count < 0) count = cch;
 822                 memcpy(wm->info.pchNext, pch, count);
 823                 wm->info.pchNext += count;
 824                 pch += count;
 825                 cch -= count;
 826                 bytesW += count;
 827                 wm->info.dwFlags |= MMIO_DIRTY;
 828             } else {
 829                 if (wm->info.fccIOProc == FOURCC_MEM) {
 830                     if (wm->info.adwInfo[0]) {
 831                         /* from where would we get the memory handle? */
 832                         FIXME("memory file expansion not implemented!\n");
 833                         break;
 834                     } else break;
 835                 }
 836             }
 837
 838             if (wm->info.pchNext == wm->info.pchEndWrite)
 839             {
 840                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 841                 MMIO_GrabNextBuffer(wm, FALSE);
 842             }
 843             else break;
 844         }
 845         count = bytesW;
 846     } else {
 847         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)pch, cch, FALSE);
 848         wm->info.lBufOffset = wm->info.lDiskOffset;
 849     }
 850
 851     TRACE("bytes written=%d\n", count);
 852     return count;
 853 }
 854
 855 /**************************************************************************
 856  *                              mmioSeek                [WINMM.@]
 857  */
 858 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 859 {
 860     LPWINE_MMIO wm;
 861     LONG        offset;
 862
 863     TRACE("(%p, %08X, %d);\n", hmmio, lOffset, iOrigin);
 864
 865     if ((wm = MMIO_Get(hmmio)) == NULL)
 866         return MMSYSERR_INVALHANDLE;
 867
 868     /* not buffered, direct seek on file */
 869     if (!wm->info.pchBuffer && wm->info.fccIOProc != FOURCC_MEM) {
 870         LRESULT ret = send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, iOrigin, FALSE);
 871         if (ret != -1)
 872             wm->info.lBufOffset = wm->info.lDiskOffset;
 873         return ret;
 874     }
 875
 876     switch (iOrigin) {
 877     case SEEK_SET:
 878         offset = lOffset;
 879         break;
 880     case SEEK_CUR:
 881         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 882         break;
 883     case SEEK_END:
 884         switch (wm->info.fccIOProc) {
 885         case FOURCC_MEM:
 886             offset = wm->info.cchBuffer - lOffset;
 887             break;
 888         case FOURCC_DOS:
 889             offset = wm->dwFileSize - lOffset;
 890             break;
 891         default:
 892             offset = send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, SEEK_END, FALSE);
 893             break;
 894         }
 895         break;
 896     default:
 897         return -1;
 898     }
 899
 900     /* stay in same buffer ? */
 901     /* some memory mapped buffers are defined with -1 as a size */
 902     if ((wm->info.cchBuffer > 0) &&
 903         ((offset < wm->info.lBufOffset) ||
 904          (offset > wm->info.lBufOffset + wm->info.cchBuffer) ||
 905          (offset > wm->dwFileSize && wm->info.fccIOProc == FOURCC_DOS) ||
 906          !wm->bBufferLoaded)) {
 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, SEEK_SET, FALSE) == -1)
 914             return -1;
 915         wm->info.lBufOffset = offset;
 916         wm->bBufferLoaded = FALSE;
 917         wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 918     }
 919     else
 920         wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 921
 922     TRACE("=> %d\n", offset);
 923     return offset;
 924 }
 925
 926 /**************************************************************************
 927  *                              mmioGetInfo             [WINMM.@]
 928  */
 929 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 930 {
 931     LPWINE_MMIO         wm;
 932
 933     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 934
 935     if ((wm = MMIO_Get(hmmio)) == NULL)
 936         return MMSYSERR_INVALHANDLE;
 937
 938     *lpmmioinfo = wm->info;
 939
 940     return MMSYSERR_NOERROR;
 941 }
 942
 943 /**************************************************************************
 944  *                              mmioSetInfo             [WINMM.@]
 945  */
 946 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 947 {
 948     LPWINE_MMIO wm;
 949
 950     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 951
 952     if ((wm = MMIO_Get(hmmio)) == NULL)
 953         return MMSYSERR_INVALHANDLE;
 954
 955     /* check pointers coherence */
 956     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 957             lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 958             lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 959             lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 960             lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 961             lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 962         return MMSYSERR_INVALPARAM;
 963
 964     wm->info = *lpmmioinfo;
 965     return MMSYSERR_NOERROR;
 966 }
 967
 968 /**************************************************************************
 969 *                               mmioSetBuffer           [WINMM.@]
 970 */
 971 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 972 {
 973     LPWINE_MMIO         wm;
 974
 975     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%d, uFlags=%#08x)\n",
 976           hmmio, pchBuffer, cchBuffer, uFlags);
 977
 978     if ((wm = MMIO_Get(hmmio)) == NULL)
 979         return MMSYSERR_INVALHANDLE;
 980
 981     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 982 }
 983
 984 /**************************************************************************
 985  *                              mmioFlush               [WINMM.@]
 986  */
 987 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 988 {
 989     LPWINE_MMIO         wm;
 990
 991     TRACE("(%p, %04X)\n", hmmio, uFlags);
 992
 993     if ((wm = MMIO_Get(hmmio)) == NULL)
 994         return MMSYSERR_INVALHANDLE;
 995
 996     return MMIO_Flush(wm, uFlags);
 997 }
 998
 999 /**************************************************************************
1000  *                              mmioAdvance             [WINMM.@]
1001  */
1002 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
1003 {
1004     LPWINE_MMIO         wm;
1005
1006     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
1007
1008     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1009      * here. be sure if you change something here to check mmioAdvance16 as well
1010      */
1011     if ((wm = MMIO_Get(hmmio)) == NULL)
1012         return MMSYSERR_INVALHANDLE;
1013
1014     if (!wm->info.cchBuffer)
1015         return MMIOERR_UNBUFFERED;
1016
1017     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1018         return MMSYSERR_INVALPARAM;
1019
1020     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1021         return MMIOERR_CANNOTWRITE;
1022     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1023     {
1024         send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lpmmioinfo->lBufOffset, SEEK_SET, FALSE);
1025         send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)lpmmioinfo->pchBuffer,
1026                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, FALSE);
1027         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1028     }
1029
1030     if (lpmmioinfo && lpmmioinfo->fccIOProc == FOURCC_DOS) {
1031         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1032                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1033     }
1034     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1035
1036     if (lpmmioinfo) {
1037         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1038         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1039             (wm->info.pchEndRead - wm->info.pchBuffer);
1040         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1041             (wm->info.pchEndWrite - wm->info.pchBuffer);
1042         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1043         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1044     }
1045     return MMSYSERR_NOERROR;
1046 }
1047
1048 /**************************************************************************
1049  *                              mmioStringToFOURCCA     [WINMM.@]
1050  */
1051 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1052 {
1053     CHAR cc[4];
1054     int i = 0;
1055
1056     for (i = 0; i < 4 && sz[i]; i++) {
1057         if (uFlags & MMIO_TOUPPER) {
1058             cc[i] = RtlUpperChar(sz[i]);
1059         } else {
1060             cc[i] = sz[i];
1061         }
1062     }
1063
1064     /* Pad with spaces */
1065     while (i < 4) cc[i++] = ' ';
1066
1067     TRACE("Got %s\n",debugstr_an(cc,4));
1068     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1069 }
1070
1071 /**************************************************************************
1072  *                              mmioStringToFOURCCW     [WINMM.@]
1073  */
1074 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1075 {
1076     char        szA[4];
1077
1078     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1079     return mmioStringToFOURCCA(szA,uFlags);
1080 }
1081
1082 /**************************************************************************
1083  *                              mmioInstallIOProcA         [WINMM.@]
1084  */
1085 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1086                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1087 {
1088     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, FALSE);
1089 }
1090
1091 /**************************************************************************
1092  *                              mmioInstallIOProcW         [WINMM.@]
1093  */
1094 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1095                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1096 {
1097     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, TRUE);
1098 }
1099
1100 /******************************************************************
1101  *              MMIO_SendMessage
1102  *
1103  *
1104  */
1105 static LRESULT  MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1106                                  LPARAM lParam2, BOOL is_unicode)
1107 {
1108     LPWINE_MMIO         wm;
1109
1110     TRACE("(%p, %u, %ld, %ld, %s)\n", hmmio, uMessage, lParam1, lParam2, is_unicode ? "unicode" : "ansi");
1111
1112     if (uMessage < MMIOM_USER)
1113         return MMSYSERR_INVALPARAM;
1114
1115     if ((wm = MMIO_Get(hmmio)) == NULL)
1116         return MMSYSERR_INVALHANDLE;
1117
1118     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, is_unicode);
1119 }
1120
1121 /**************************************************************************
1122  *                              mmioSendMessage         [WINMM.@]
1123  */
1124 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1125                                LPARAM lParam1, LPARAM lParam2)
1126 {
1127     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, FALSE);
1128 }
1129
1130 /**************************************************************************
1131  *                              mmioDescend             [WINMM.@]
1132  */
1133 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1134                             const MMCKINFO* lpckParent, UINT uFlags)
1135 {
1136     DWORD               dwOldPos;
1137     FOURCC              srchCkId;
1138     FOURCC              srchType;
1139
1140     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1141
1142     if (lpck == NULL)
1143         return MMSYSERR_INVALPARAM;
1144
1145     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1146     TRACE("dwOldPos=%d\n", dwOldPos);
1147
1148     if (lpckParent != NULL) {
1149         TRACE("seek inside parent at %d !\n", lpckParent->dwDataOffset);
1150         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1151         if (dwOldPos < lpckParent->dwDataOffset ||
1152             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1153             WARN("outside parent chunk\n");
1154             return MMIOERR_CHUNKNOTFOUND;
1155         }
1156     }
1157
1158     /* The SDK docu says 'ckid' is used for all cases. Real World
1159      * examples disagree -Marcus,990216.
1160      */
1161
1162     srchCkId = 0;
1163     srchType = 0;
1164
1165     /* find_chunk looks for 'ckid' */
1166     if (uFlags & MMIO_FINDCHUNK)
1167         srchCkId = lpck->ckid;
1168
1169     /* find_riff and find_list look for 'fccType' */
1170     if (uFlags & MMIO_FINDLIST)
1171     {
1172         srchCkId = FOURCC_LIST;
1173         srchType = lpck->fccType;
1174     }
1175
1176     if (uFlags & MMIO_FINDRIFF)
1177     {
1178         srchCkId = FOURCC_RIFF;
1179         srchType = lpck->fccType;
1180     }
1181
1182     TRACE("searching for %s.%s\n",
1183           debugstr_an((LPCSTR)&srchCkId, 4), srchType ? debugstr_an((LPCSTR)&srchType, 4) : "<any>");
1184
1185     while (TRUE)
1186     {
1187         LONG ix;
1188
1189         ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1190         if (ix < 2*sizeof(DWORD))
1191         {
1192             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1193             WARN("return ChunkNotFound\n");
1194             return MMIOERR_CHUNKNOTFOUND;
1195         }
1196
1197         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1198         TRACE("ckid=%s fcc=%s cksize=%08X !\n",
1199               debugstr_an((LPCSTR)&lpck->ckid, 4),
1200               srchType ? debugstr_an((LPCSTR)&lpck->fccType, 4) : "<na>",
1201               lpck->cksize);
1202         if ( (!srchCkId || (srchCkId == lpck->ckid)) &&
1203              (!srchType || (srchType == lpck->fccType)) )
1204             break;
1205
1206         dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1207         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1208     }
1209
1210     lpck->dwFlags = 0;
1211     /* If we were looking for RIFF/LIST chunks, the final file position
1212      * is after the chunkid. If we were just looking for the chunk
1213      * it is after the cksize. So add 4 in RIFF/LIST case.
1214      */
1215     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1216         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1217     else
1218     {
1219         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1220         lpck->fccType = 0;
1221     }
1222     TRACE("lpck: ckid=%s, cksize=%d, dwDataOffset=%d fccType=%08X (%s)!\n",
1223           debugstr_an((LPSTR)&lpck->ckid, 4), lpck->cksize, lpck->dwDataOffset,
1224           lpck->fccType, srchType ? debugstr_an((LPSTR)&lpck->fccType, 4):"");
1225     return MMSYSERR_NOERROR;
1226 }
1227
1228 /**************************************************************************
1229  *                              mmioAscend              [WINMM.@]
1230  */
1231 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1232 {
1233     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1234
1235     if (lpck->dwFlags & MMIO_DIRTY) {
1236         DWORD   dwOldPos, dwNewSize;
1237
1238         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1239         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1240         TRACE("dwOldPos=%d lpck->dwDataOffset = %d\n", dwOldPos, lpck->dwDataOffset);
1241         dwNewSize = dwOldPos - lpck->dwDataOffset;
1242         if (dwNewSize != lpck->cksize) {
1243             TRACE("Nope: lpck->cksize=%d dwNewSize=%d\n", lpck->cksize, dwNewSize);
1244             lpck->cksize = dwNewSize;
1245
1246             /* pad odd size with 0 */
1247             if (dwNewSize & 1) {
1248                 char ch = 0;
1249                 mmioWrite(hmmio, &ch, 1);
1250             }
1251             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1252             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1253         }
1254         lpck->dwFlags = 0;
1255     }
1256
1257     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1258
1259     return MMSYSERR_NOERROR;
1260 }
1261
1262 /**************************************************************************
1263  *                      mmioCreateChunk                         [WINMM.@]
1264  */
1265 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1266 {
1267     DWORD       dwOldPos;
1268     LONG        size;
1269     LONG        ix;
1270
1271     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1272
1273     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1274     TRACE("dwOldPos=%d\n", dwOldPos);
1275
1276     if (uFlags == MMIO_CREATELIST)
1277         lpck->ckid = FOURCC_LIST;
1278     else if (uFlags == MMIO_CREATERIFF)
1279         lpck->ckid = FOURCC_RIFF;
1280
1281     TRACE("ckid=%s\n", debugstr_an((LPSTR)&lpck->ckid, 4));
1282
1283     size = 2 * sizeof(DWORD);
1284     lpck->dwDataOffset = dwOldPos + size;
1285
1286     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1287         size += sizeof(DWORD);
1288     lpck->dwFlags = MMIO_DIRTY;
1289
1290     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1291     TRACE("after mmioWrite ix = %d req = %d, errno = %d\n", ix, size, errno);
1292     if (ix < size) {
1293         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1294         WARN("return CannotWrite\n");
1295         return MMIOERR_CANNOTWRITE;
1296     }
1297
1298     return MMSYSERR_NOERROR;
1299 }
1300
1301 /**************************************************************************
1302  *                              mmioRenameA                     [WINMM.@]
1303  */
1304 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1305                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1306 {
1307     struct IOProcList*  ioProc = NULL;
1308     struct IOProcList   tmp;
1309     FOURCC              fcc;
1310
1311     TRACE("(%s, %s, %p, %08X);\n",
1312           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1313
1314     /* If both params are NULL, then parse the file name */
1315     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1316     {
1317         fcc = MMIO_ParseExtA(szFileName);
1318         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1319     }
1320
1321     /* Handle any unhandled/error case from above. Assume DOS file */
1322     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1323         ioProc = &defaultProcs[0];
1324     /* if just the four character code is present, look up IO proc */
1325     else if (lpmmioinfo->pIOProc == NULL)
1326         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1327     else /* use relevant ioProc */
1328     {
1329         ioProc = &tmp;
1330         tmp.fourCC = lpmmioinfo->fccIOProc;
1331         tmp.pIOProc = lpmmioinfo->pIOProc;
1332         tmp.is_unicode = FALSE;
1333         tmp.count = 1;
1334     }
1335
1336     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1337      * or make a copy of it because it's const ???
1338      */
1339     return send_message(ioProc, (MMIOINFO*)lpmmioinfo, MMIOM_RENAME,
1340                         (LPARAM)szFileName, (LPARAM)szNewFileName, FALSE);
1341 }
1342
1343 /**************************************************************************
1344  *                              mmioRenameW                     [WINMM.@]
1345  */
1346 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1347                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1348 {
1349     LPSTR       szFn = NULL;
1350     LPSTR       sznFn = NULL;
1351     UINT        ret = MMSYSERR_NOMEM;
1352     INT         len;
1353
1354     if (szFileName)
1355     {
1356         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1357         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1358         if (!szFn) goto done;
1359         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1360     }
1361     if (szNewFileName)
1362     {
1363         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1364         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1365         if (!sznFn) goto done;
1366         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1367     }
1368
1369     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1370
1371 done:
1372     HeapFree(GetProcessHeap(),0,szFn);
1373     HeapFree(GetProcessHeap(),0,sznFn);
1374     return ret;
1375 }