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 "mmsystem.h"
  42 #include "winemm.h"
  43
  44 #include "wine/debug.h"
  45
  46 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  47
  48 static WINE_MMIO *MMIOList;
  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] = OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
  80             }
  81             if (lpmmioinfo->adwInfo[0] == HFILE_ERROR)
  82                 ret = MMIOERR_FILENOTFOUND;
  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, FALSE, 0},
 231     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, FALSE, 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 static LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 257                                      DWORD dwFlags, BOOL is_unicode)
 258 {
 259     LPMMIOPROC          lpProc = NULL;
 260     struct IOProcList*  pListNode;
 261     struct IOProcList** ppListNode;
 262
 263     TRACE("(%08x, %p, %08X, %s)\n", fccIOProc, pIOProc, dwFlags, is_unicode ? "unicode" : "ansi");
 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->is_unicode = is_unicode;
 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) / sizeof(defaultProcs[0])) {
 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, BOOL is_unicode)
 343 {
 344     LRESULT             result = MMSYSERR_ERROR;
 345     LPARAM              lp1 = lParam1, lp2 = lParam2;
 346
 347     if (!ioProc) {
 348         ERR("ioProc NULL\n");
 349         return MMSYSERR_INVALPARAM;
 350     }
 351
 352     if (ioProc->is_unicode != is_unicode) {
 353         /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 354         FIXME("NIY 32 A<=>W mapping\n");
 355     }
 356     result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 357
 358 #if 0
 359     if (ioProc->is_unicode != is_unicode) {
 360             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 361         }
 362 #endif
 363
 364     return result;
 365 }
 366
 367 /**************************************************************************
 368  *                              MMIO_ParseExtA                  [internal]
 369  *
 370  * Parses a filename for the extension.
 371  *
 372  * RETURNS
 373  *  The FOURCC code for the extension if found, else 0.
 374  */
 375 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 376 {
 377     /* Filenames are of the form file.ext{+ABC}
 378        For now, we take the last '+' if present */
 379
 380     FOURCC ret = 0;
 381
 382     /* Note that ext{Start,End} point to the . and + respectively */
 383     LPCSTR extEnd;
 384     LPCSTR extStart;
 385
 386     CHAR ext[5];
 387
 388     TRACE("(%s)\n", debugstr_a(szFileName));
 389
 390     if (!szFileName)
 391         return ret;
 392
 393     /* Find the last '+' */
 394     extEnd = strrchr(szFileName,'+');
 395
 396     if (!extEnd) {
 397          /* No + so just an extension */
 398          return ret;
 399     } else {
 400         /* Find the first '.' before '+' */
 401         extStart = extEnd - 1;
 402         while (extStart >= szFileName && *extStart != '.') {
 403             extStart--;
 404         }
 405         if (extStart < szFileName) {
 406             ERR("No extension in szFileName: %s\n", debugstr_a(szFileName));
 407             return ret;
 408         }
 409     }
 410
 411     if (extEnd - extStart - 1 > 4)
 412         WARN("Extension length > 4\n");
 413     lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 414
 415     TRACE("Got extension: %s\n", debugstr_a(ext));
 416
 417     /* FOURCC codes identifying file-extensions must be uppercase */
 418     ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 419
 420     return ret;
 421 }
 422
 423 /**************************************************************************
 424  *                              MMIO_Get                        [internal]
 425  *
 426  * Retrieves the mmio object from current process
 427  */
 428 static LPWINE_MMIO      MMIO_Get(HMMIO h)
 429 {
 430     LPWINE_MMIO         wm = NULL;
 431
 432     EnterCriticalSection(&WINMM_cs);
 433     for (wm = MMIOList; wm; wm = wm->lpNext) {
 434         if (wm->info.hmmio == h)
 435             break;
 436     }
 437     LeaveCriticalSection(&WINMM_cs);
 438     return wm;
 439 }
 440
 441 /**************************************************************************
 442  *                              MMIO_Create                     [internal]
 443  *
 444  * Creates an internal representation for a mmio instance
 445  */
 446 static  LPWINE_MMIO             MMIO_Create(void)
 447 {
 448     static      WORD    MMIO_counter = 0;
 449     LPWINE_MMIO         wm;
 450
 451     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 452     if (wm) {
 453         EnterCriticalSection(&WINMM_cs);
 454         /* lookup next unallocated WORD handle, with a non NULL value */
 455         while (++MMIO_counter == 0 || MMIO_Get((HMMIO)(ULONG_PTR)MMIO_counter));
 456         wm->info.hmmio = (HMMIO)(ULONG_PTR)MMIO_counter;
 457         wm->lpNext = MMIOList;
 458         MMIOList = wm;
 459         LeaveCriticalSection(&WINMM_cs);
 460     }
 461     return wm;
 462 }
 463
 464 /**************************************************************************
 465  *                              MMIO_Destroy                    [internal]
 466  *-
 467  * Destroys an internal representation for a mmio instance
 468  */
 469 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 470 {
 471     LPWINE_MMIO*        m;
 472
 473     EnterCriticalSection(&WINMM_cs);
 474     /* search for the matching one... */
 475     m = &MMIOList;
 476     while (*m && *m != wm) m = &(*m)->lpNext;
 477     /* ...and destroy */
 478     if (*m) {
 479         *m = (*m)->lpNext;
 480         HeapFree(GetProcessHeap(), 0, wm);
 481         wm = NULL;
 482     }
 483     LeaveCriticalSection(&WINMM_cs);
 484     return wm ? FALSE : TRUE;
 485 }
 486
 487 /****************************************************************
 488  *                      MMIO_Flush                      [INTERNAL]
 489  */
 490 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 491 {
 492     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 493         /* not quite sure what to do here, but I'll guess */
 494         if (wm->info.dwFlags & MMIO_DIRTY) {
 495             /* FIXME: error handling */
 496             send_message(wm->ioProc, &wm->info, MMIOM_SEEK, wm->info.lBufOffset, SEEK_SET, FALSE);
 497             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 498                          (LPARAM)wm->info.pchBuffer,
 499                          wm->info.pchNext - wm->info.pchBuffer, FALSE);
 500         }
 501         if (uFlags & MMIO_EMPTYBUF)
 502             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 503     }
 504     wm->info.dwFlags &= ~MMIO_DIRTY;
 505
 506     return MMSYSERR_NOERROR;
 507 }
 508
 509 /***************************************************************************
 510  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 511  */
 512 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 513 {
 514     LONG        size = wm->info.cchBuffer;
 515
 516     TRACE("bo=%x do=%x of=%lx\n",
 517           wm->info.lBufOffset, wm->info.lDiskOffset,
 518           send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, FALSE));
 519
 520     wm->info.lBufOffset = wm->info.lDiskOffset;
 521     wm->info.pchNext = wm->info.pchBuffer;
 522     wm->info.pchEndRead = wm->info.pchBuffer;
 523     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 524
 525     wm->bBufferLoaded = TRUE;
 526     if (for_read) {
 527         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 528                             (LPARAM)wm->info.pchBuffer, size, FALSE);
 529         if (size > 0)
 530             wm->info.pchEndRead += size;
 531         else
 532             wm->bBufferLoaded = FALSE;
 533     }
 534
 535     return size;
 536 }
 537
 538 /***************************************************************************
 539  *                      MMIO_SetBuffer                          [INTERNAL]
 540  */
 541 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 542                                UINT uFlags)
 543 {
 544     TRACE("(%p %p %d %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 545
 546     if (cchBuffer > 0xFFFF)
 547         WARN("Untested handling of huge mmio buffers (%d >= 64k)\n", cchBuffer);
 548
 549     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 550         return MMIOERR_CANNOTWRITE;
 551
 552     /* free previous buffer if allocated */
 553     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 554         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 555         wm->info.pchBuffer = NULL;
 556         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 557     }
 558
 559     if (pchBuffer) {
 560         wm->info.pchBuffer = pchBuffer;
 561     } else if (cchBuffer) {
 562         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 563             return MMIOERR_OUTOFMEMORY;
 564         wm->info.dwFlags |= MMIO_ALLOCBUF;
 565     } else {
 566         wm->info.pchBuffer = NULL;
 567     }
 568
 569     wm->info.cchBuffer = cchBuffer;
 570     wm->info.pchNext = wm->info.pchBuffer;
 571     wm->info.pchEndRead = wm->info.pchBuffer;
 572     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 573     wm->info.lBufOffset = wm->info.lDiskOffset;
 574     wm->bBufferLoaded = FALSE;
 575
 576     return MMSYSERR_NOERROR;
 577 }
 578
 579 /**************************************************************************
 580  *                      MMIO_Open                               [internal]
 581  */
 582 static HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags, BOOL is_unicode)
 583 {
 584     LPWINE_MMIO         wm;
 585     MMIOINFO            mmioinfo;
 586     DWORD               pos;
 587
 588     TRACE("(%s, %p, %08X, %s);\n", debugstr_a(szFileName), refmminfo, dwOpenFlags, is_unicode ? "unicode" : "ansi");
 589
 590     if (!refmminfo) {
 591         refmminfo = &mmioinfo;
 592
 593         mmioinfo.fccIOProc = 0;
 594         mmioinfo.pIOProc = NULL;
 595         mmioinfo.pchBuffer = NULL;
 596         mmioinfo.cchBuffer = 0;
 597         is_unicode = FALSE;
 598     }
 599
 600     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 601         char    buffer[MAX_PATH];
 602
 603         if (!szFileName)
 604             return (HMMIO)FALSE;
 605         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 606             return (HMMIO)FALSE;
 607         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 608             return (HMMIO)FALSE;
 609         strcpy(szFileName, buffer);
 610         return (HMMIO)TRUE;
 611     }
 612
 613     if ((wm = MMIO_Create()) == NULL)
 614         return 0;
 615
 616     /* If both params are NULL, then parse the file name if available */
 617     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 618         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 619         /* Handle any unhandled/error case. Assume DOS file */
 620         if (wm->info.fccIOProc == 0) {
 621             wm->info.fccIOProc = FOURCC_DOS;
 622             wm->ioProc = &defaultProcs[0];
 623         }
 624         else if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) {
 625             /* If not found, assume DOS file */
 626             wm->ioProc = &defaultProcs[0];
 627         }
 628         wm->bTmpIOProc = FALSE;
 629     }
 630     /* if just the four character code is present, look up IO proc */
 631     else if (refmminfo->pIOProc == NULL) {
 632         wm->info.fccIOProc = refmminfo->fccIOProc;
 633         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 634         wm->bTmpIOProc = FALSE;
 635     }
 636     /* if IO proc specified, use it and specified four character code */
 637     else {
 638         wm->info.fccIOProc = refmminfo->fccIOProc;
 639         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 640                            MMIO_INSTALLPROC, is_unicode);
 641         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 642         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 643         wm->bTmpIOProc = TRUE;
 644     }
 645
 646     wm->ioProc->count++;
 647     wm->info.dwFlags = dwOpenFlags;
 648
 649     if (dwOpenFlags & MMIO_ALLOCBUF) {
 650         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer,
 651             refmminfo->cchBuffer ? refmminfo->cchBuffer : MMIO_DEFAULTBUFFER, 0);
 652         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 653             goto error1;
 654     } else {
 655         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 656         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 657             goto error1;
 658     }
 659
 660     if (wm->info.fccIOProc == FOURCC_MEM && !(wm->info.dwFlags & MMIO_ALLOCBUF))
 661         wm->bBufferLoaded = TRUE;
 662
 663     /* see mmioDosIOProc for that one */
 664     wm->info.adwInfo[0] = refmminfo->adwInfo[0];
 665
 666     /* call IO proc to actually open file */
 667     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 668                                         (LPARAM)szFileName, 0, FALSE);
 669
 670     /* grab file size, when possible */
 671     if (wm->info.fccIOProc != FOURCC_MEM && (send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, FALSE)) != -1) {
 672        pos = wm->info.lDiskOffset;
 673        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_END, FALSE);
 674        wm->dwFileSize = wm->info.lDiskOffset;
 675        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, pos, SEEK_SET, FALSE);
 676     }
 677     else wm->dwFileSize = 0;
 678
 679     if (refmminfo->wErrorRet == 0)
 680         return wm->info.hmmio;
 681  error1:
 682     if (wm->info.dwFlags & MMIO_ALLOCBUF)
 683         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 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, TRUE);
 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, FALSE);
 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, uFlags, 0, FALSE);
 739
 740     MMIO_SetBuffer(wm, NULL, 0, 0);
 741
 742     wm->ioProc->count--;
 743
 744     if (wm->bTmpIOProc)
 745         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 746                            MMIO_REMOVEPROC, wm->ioProc->is_unicode);
 747
 748     MMIO_Destroy(wm);
 749
 750     return result;
 751 }
 752
 753 /**************************************************************************
 754  *                              mmioRead                [WINMM.@]
 755  */
 756 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 757 {
 758     LPWINE_MMIO wm;
 759     LONG        count;
 760
 761     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 762
 763     if ((wm = MMIO_Get(hmmio)) == NULL)
 764         return -1;
 765
 766     /* unbuffered case first */
 767     if (!wm->info.pchBuffer)
 768         return send_message(wm->ioProc, &wm->info, MMIOM_READ, (LPARAM)pch, cch, FALSE);
 769
 770     /* first try from current buffer */
 771     if (wm->info.pchNext != wm->info.pchEndRead) {
 772         count = wm->info.pchEndRead - wm->info.pchNext;
 773         if (count > cch || count < 0) count = cch;
 774         memcpy(pch, wm->info.pchNext, count);
 775         wm->info.pchNext += count;
 776         pch += count;
 777         cch -= count;
 778     } else
 779         count = 0;
 780
 781     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 782         assert(wm->info.cchBuffer);
 783
 784         while (cch) {
 785             LONG size;
 786
 787             size = MMIO_GrabNextBuffer(wm, TRUE);
 788             if (size <= 0) break;
 789             if (size > cch) size = cch;
 790             memcpy(pch, wm->info.pchBuffer, size);
 791             wm->info.pchNext += size;
 792             pch += size;
 793             cch -= size;
 794             count += size;
 795         }
 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         count = 0;
 819         while (cch) {
 820             if (wm->info.pchNext != wm->info.pchEndWrite) {
 821                 count = wm->info.pchEndWrite - wm->info.pchNext;
 822                 if (count > cch || count < 0) count = cch;
 823                 memcpy(wm->info.pchNext, pch, count);
 824                 wm->info.pchNext += count;
 825                 pch += count;
 826                 cch -= count;
 827                 bytesW += count;
 828                 wm->info.dwFlags |= MMIO_DIRTY;
 829             } else {
 830                 if (wm->info.fccIOProc == FOURCC_MEM) {
 831                     if (wm->info.adwInfo[0]) {
 832                         /* from where would we get the memory handle? */
 833                         FIXME("memory file expansion not implemented!\n");
 834                         break;
 835                     } else break;
 836                 }
 837             }
 838
 839             if (wm->info.pchNext == wm->info.pchEndWrite)
 840             {
 841                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 842                 MMIO_GrabNextBuffer(wm, FALSE);
 843             }
 844             else break;
 845         }
 846         count = bytesW;
 847     } else {
 848         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)pch, cch, FALSE);
 849         wm->info.lBufOffset = wm->info.lDiskOffset;
 850     }
 851
 852     TRACE("bytes written=%d\n", count);
 853     return count;
 854 }
 855
 856 /**************************************************************************
 857  *                              mmioSeek                [WINMM.@]
 858  */
 859 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 860 {
 861     LPWINE_MMIO wm;
 862     LONG        offset;
 863
 864     TRACE("(%p, %08X, %d);\n", hmmio, lOffset, iOrigin);
 865
 866     if ((wm = MMIO_Get(hmmio)) == NULL)
 867         return MMSYSERR_INVALHANDLE;
 868
 869     /* not buffered, direct seek on file */
 870     if (!wm->info.pchBuffer)
 871         return send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, iOrigin, FALSE);
 872
 873     switch (iOrigin) {
 874     case SEEK_SET:
 875         offset = lOffset;
 876         break;
 877     case SEEK_CUR:
 878         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 879         break;
 880     case SEEK_END:
 881         offset = ((wm->info.fccIOProc == FOURCC_MEM)? wm->info.cchBuffer : wm->dwFileSize) - lOffset;
 882         break;
 883     default:
 884         return -1;
 885     }
 886
 887     if (offset && offset >= wm->dwFileSize && wm->info.fccIOProc != FOURCC_MEM) {
 888         /* should check that write mode exists */
 889         if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 890             return -1;
 891         wm->info.lBufOffset = offset;
 892         wm->info.pchEndRead = wm->info.pchBuffer;
 893         wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 894         if ((wm->info.dwFlags & MMIO_RWMODE) == MMIO_READ) {
 895             wm->info.lDiskOffset = wm->dwFileSize;
 896         }
 897     } else if ((wm->info.cchBuffer > 0) &&
 898         ((offset < wm->info.lBufOffset) ||
 899          (offset >= wm->info.lBufOffset + wm->info.cchBuffer) ||
 900          !wm->bBufferLoaded)) {
 901         /* stay in same buffer ? */
 902         /* some memory mapped buffers are defined with -1 as a size */
 903
 904         /* condition to change buffer */
 905         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 906             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 907             /* this also sets the wm->info.lDiskOffset field */
 908             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 909                          (offset / wm->info.cchBuffer) * wm->info.cchBuffer,
 910                          SEEK_SET, FALSE) == -1)
 911             return -1;
 912         MMIO_GrabNextBuffer(wm, TRUE);
 913     }
 914
 915     wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 916
 917     TRACE("=> %d\n", offset);
 918     return offset;
 919 }
 920
 921 /**************************************************************************
 922  *                              mmioGetInfo             [WINMM.@]
 923  */
 924 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 925 {
 926     LPWINE_MMIO         wm;
 927
 928     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 929
 930     if ((wm = MMIO_Get(hmmio)) == NULL)
 931         return MMSYSERR_INVALHANDLE;
 932
 933     *lpmmioinfo = wm->info;
 934
 935     return MMSYSERR_NOERROR;
 936 }
 937
 938 /**************************************************************************
 939  *                              mmioSetInfo             [WINMM.@]
 940  */
 941 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 942 {
 943     LPWINE_MMIO         wm;
 944
 945     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 946
 947     if ((wm = MMIO_Get(hmmio)) == NULL)
 948         return MMSYSERR_INVALHANDLE;
 949
 950     /* check pointers coherence */
 951     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 952         lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 953         lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 954         lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 955         lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 956         lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 957         return MMSYSERR_INVALPARAM;
 958
 959     wm->info.pchNext = lpmmioinfo->pchNext;
 960     wm->info.pchEndRead = lpmmioinfo->pchEndRead;
 961
 962     return MMSYSERR_NOERROR;
 963 }
 964
 965 /**************************************************************************
 966 *                               mmioSetBuffer           [WINMM.@]
 967 */
 968 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 969 {
 970     LPWINE_MMIO         wm;
 971
 972     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%d, uFlags=%#08x)\n",
 973           hmmio, pchBuffer, cchBuffer, uFlags);
 974
 975     if ((wm = MMIO_Get(hmmio)) == NULL)
 976         return MMSYSERR_INVALHANDLE;
 977
 978     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 979 }
 980
 981 /**************************************************************************
 982  *                              mmioFlush               [WINMM.@]
 983  */
 984 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 985 {
 986     LPWINE_MMIO         wm;
 987
 988     TRACE("(%p, %04X)\n", hmmio, uFlags);
 989
 990     if ((wm = MMIO_Get(hmmio)) == NULL)
 991         return MMSYSERR_INVALHANDLE;
 992
 993     return MMIO_Flush(wm, uFlags);
 994 }
 995
 996 /**************************************************************************
 997  *                              mmioAdvance             [WINMM.@]
 998  */
 999 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
1000 {
1001     LPWINE_MMIO         wm;
1002
1003     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
1004
1005     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1006      * here. be sure if you change something here to check mmioAdvance16 as well
1007      */
1008     if ((wm = MMIO_Get(hmmio)) == NULL)
1009         return MMSYSERR_INVALHANDLE;
1010
1011     if (!wm->info.cchBuffer)
1012         return MMIOERR_UNBUFFERED;
1013
1014     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1015         return MMSYSERR_INVALPARAM;
1016
1017     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1018     {
1019         send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lpmmioinfo->lBufOffset, SEEK_SET, FALSE);
1020         send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)lpmmioinfo->pchBuffer,
1021                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, FALSE);
1022         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1023     }
1024     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1025         return MMIOERR_CANNOTWRITE;
1026
1027     if (lpmmioinfo) {
1028         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1029                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1030     }
1031     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1032
1033     if (lpmmioinfo) {
1034         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1035         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1036             (wm->info.pchEndRead - wm->info.pchBuffer);
1037         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1038             (wm->info.pchEndWrite - wm->info.pchBuffer);
1039         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1040         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1041     }
1042     return MMSYSERR_NOERROR;
1043 }
1044
1045 /**************************************************************************
1046  *                              mmioStringToFOURCCA     [WINMM.@]
1047  */
1048 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1049 {
1050     CHAR cc[4];
1051     int i = 0;
1052
1053     for (i = 0; i < 4 && sz[i]; i++) {
1054         if (uFlags & MMIO_TOUPPER) {
1055             cc[i] = toupper(sz[i]);
1056         } else {
1057             cc[i] = sz[i];
1058         }
1059     }
1060
1061     /* Pad with spaces */
1062     while (i < 4) cc[i++] = ' ';
1063
1064     TRACE("Got %s\n",debugstr_an(cc,4));
1065     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1066 }
1067
1068 /**************************************************************************
1069  *                              mmioStringToFOURCCW     [WINMM.@]
1070  */
1071 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1072 {
1073     char        szA[4];
1074
1075     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1076     return mmioStringToFOURCCA(szA,uFlags);
1077 }
1078
1079 /**************************************************************************
1080  *                              mmioInstallIOProcA         [WINMM.@]
1081  */
1082 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1083                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1084 {
1085     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, FALSE);
1086 }
1087
1088 /**************************************************************************
1089  *                              mmioInstallIOProcW         [WINMM.@]
1090  */
1091 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1092                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1093 {
1094     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, TRUE);
1095 }
1096
1097 /******************************************************************
1098  *              MMIO_SendMessage
1099  *
1100  *
1101  */
1102 static LRESULT  MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1103                                  LPARAM lParam2, BOOL is_unicode)
1104 {
1105     LPWINE_MMIO         wm;
1106
1107     TRACE("(%p, %u, %ld, %ld, %s)\n", hmmio, uMessage, lParam1, lParam2, is_unicode ? "unicode" : "ansi");
1108
1109     if (uMessage < MMIOM_USER)
1110         return MMSYSERR_INVALPARAM;
1111
1112     if ((wm = MMIO_Get(hmmio)) == NULL)
1113         return MMSYSERR_INVALHANDLE;
1114
1115     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, is_unicode);
1116 }
1117
1118 /**************************************************************************
1119  *                              mmioSendMessage         [WINMM.@]
1120  */
1121 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1122                                LPARAM lParam1, LPARAM lParam2)
1123 {
1124     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, FALSE);
1125 }
1126
1127 /**************************************************************************
1128  *                              mmioDescend             [WINMM.@]
1129  */
1130 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1131                             const MMCKINFO* lpckParent, UINT uFlags)
1132 {
1133     DWORD               dwOldPos;
1134     FOURCC              srchCkId;
1135     FOURCC              srchType;
1136
1137     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1138
1139     if (lpck == NULL)
1140         return MMSYSERR_INVALPARAM;
1141
1142     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1143     TRACE("dwOldPos=%d\n", dwOldPos);
1144
1145     if (lpckParent != NULL) {
1146         TRACE("seek inside parent at %d !\n", lpckParent->dwDataOffset);
1147         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1148         if (dwOldPos < lpckParent->dwDataOffset ||
1149             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1150             WARN("outside parent chunk\n");
1151             return MMIOERR_CHUNKNOTFOUND;
1152         }
1153     }
1154
1155     /* The SDK docu says 'ckid' is used for all cases. Real World
1156      * examples disagree -Marcus,990216.
1157      */
1158
1159     srchCkId = 0;
1160     srchType = 0;
1161
1162     /* find_chunk looks for 'ckid' */
1163     if (uFlags & MMIO_FINDCHUNK)
1164         srchCkId = lpck->ckid;
1165
1166     /* find_riff and find_list look for 'fccType' */
1167     if (uFlags & MMIO_FINDLIST)
1168     {
1169         srchCkId = FOURCC_LIST;
1170         srchType = lpck->fccType;
1171     }
1172
1173     if (uFlags & MMIO_FINDRIFF)
1174     {
1175         srchCkId = FOURCC_RIFF;
1176         srchType = lpck->fccType;
1177     }
1178
1179     TRACE("searching for %s.%s\n",
1180           debugstr_an((LPCSTR)&srchCkId, 4), srchType ? debugstr_an((LPCSTR)&srchType, 4) : "<any>");
1181
1182     while (TRUE)
1183     {
1184         LONG ix;
1185
1186         ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1187         if (ix < 2*sizeof(DWORD))
1188         {
1189             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1190             WARN("return ChunkNotFound\n");
1191             return MMIOERR_CHUNKNOTFOUND;
1192         }
1193
1194         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1195         TRACE("ckid=%s fcc=%s cksize=%08X !\n",
1196               debugstr_an((LPCSTR)&lpck->ckid, 4),
1197               srchType ? debugstr_an((LPCSTR)&lpck->fccType, 4) : "<na>",
1198               lpck->cksize);
1199         if ( (!srchCkId || (srchCkId == lpck->ckid)) &&
1200              (!srchType || (srchType == lpck->fccType)) )
1201             break;
1202
1203         dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1204         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1205     }
1206
1207     lpck->dwFlags = 0;
1208     /* If we were looking for RIFF/LIST chunks, the final file position
1209      * is after the chunkid. If we were just looking for the chunk
1210      * it is after the cksize. So add 4 in RIFF/LIST case.
1211      */
1212     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1213         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1214     else
1215     {
1216         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1217         lpck->fccType = 0;
1218     }
1219     TRACE("lpck: ckid=%s, cksize=%d, dwDataOffset=%d fccType=%08X (%s)!\n",
1220           debugstr_an((LPSTR)&lpck->ckid, 4), lpck->cksize, lpck->dwDataOffset,
1221           lpck->fccType, srchType ? debugstr_an((LPSTR)&lpck->fccType, 4):"");
1222     return MMSYSERR_NOERROR;
1223 }
1224
1225 /**************************************************************************
1226  *                              mmioAscend              [WINMM.@]
1227  */
1228 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1229 {
1230     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1231
1232     if (lpck->dwFlags & MMIO_DIRTY) {
1233         DWORD   dwOldPos, dwNewSize;
1234
1235         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1236         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1237         TRACE("dwOldPos=%d lpck->dwDataOffset = %d\n", dwOldPos, lpck->dwDataOffset);
1238         dwNewSize = dwOldPos - lpck->dwDataOffset;
1239         if (dwNewSize != lpck->cksize) {
1240             TRACE("Nope: lpck->cksize=%d dwNewSize=%d\n", lpck->cksize, dwNewSize);
1241             lpck->cksize = dwNewSize;
1242
1243             /* pad odd size with 0 */
1244             if (dwNewSize & 1) {
1245                 char ch = 0;
1246                 mmioWrite(hmmio, &ch, 1);
1247             }
1248             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1249             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1250         }
1251         lpck->dwFlags = 0;
1252     }
1253
1254     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1255
1256     return MMSYSERR_NOERROR;
1257 }
1258
1259 /**************************************************************************
1260  *                      mmioCreateChunk                         [WINMM.@]
1261  */
1262 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1263 {
1264     DWORD       dwOldPos;
1265     LONG        size;
1266     LONG        ix;
1267
1268     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1269
1270     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1271     TRACE("dwOldPos=%d\n", dwOldPos);
1272
1273     if (uFlags == MMIO_CREATELIST)
1274         lpck->ckid = FOURCC_LIST;
1275     else if (uFlags == MMIO_CREATERIFF)
1276         lpck->ckid = FOURCC_RIFF;
1277
1278     TRACE("ckid=%s\n", debugstr_an((LPSTR)&lpck->ckid, 4));
1279
1280     size = 2 * sizeof(DWORD);
1281     lpck->dwDataOffset = dwOldPos + size;
1282
1283     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1284         size += sizeof(DWORD);
1285     lpck->dwFlags = MMIO_DIRTY;
1286
1287     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1288     TRACE("after mmioWrite ix = %d req = %d, errno = %d\n", ix, size, errno);
1289     if (ix < size) {
1290         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1291         WARN("return CannotWrite\n");
1292         return MMIOERR_CANNOTWRITE;
1293     }
1294
1295     return MMSYSERR_NOERROR;
1296 }
1297
1298 /**************************************************************************
1299  *                              mmioRenameA                     [WINMM.@]
1300  */
1301 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1302                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1303 {
1304     struct IOProcList*  ioProc = NULL;
1305     struct IOProcList   tmp;
1306     FOURCC              fcc;
1307
1308     TRACE("(%s, %s, %p, %08X);\n",
1309           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1310
1311     /* If both params are NULL, then parse the file name */
1312     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1313     {
1314         fcc = MMIO_ParseExtA(szFileName);
1315         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1316     }
1317
1318     /* Handle any unhandled/error case from above. Assume DOS file */
1319     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1320         ioProc = &defaultProcs[0];
1321     /* if just the four character code is present, look up IO proc */
1322     else if (lpmmioinfo->pIOProc == NULL)
1323         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1324     else /* use relevant ioProc */
1325     {
1326         ioProc = &tmp;
1327         tmp.fourCC = lpmmioinfo->fccIOProc;
1328         tmp.pIOProc = lpmmioinfo->pIOProc;
1329         tmp.is_unicode = FALSE;
1330         tmp.count = 1;
1331     }
1332
1333     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1334      * or make a copy of it because it's const ???
1335      */
1336     return send_message(ioProc, (MMIOINFO*)lpmmioinfo, MMIOM_RENAME,
1337                         (LPARAM)szFileName, (LPARAM)szNewFileName, FALSE);
1338 }
1339
1340 /**************************************************************************
1341  *                              mmioRenameW                     [WINMM.@]
1342  */
1343 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1344                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1345 {
1346     LPSTR       szFn = NULL;
1347     LPSTR       sznFn = NULL;
1348     UINT        ret = MMSYSERR_NOMEM;
1349     INT         len;
1350
1351     if (szFileName)
1352     {
1353         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1354         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1355         if (!szFn) goto done;
1356         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1357     }
1358     if (szNewFileName)
1359     {
1360         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1361         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1362         if (!sznFn) goto done;
1363         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1364     }
1365
1366     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1367
1368 done:
1369     HeapFree(GetProcessHeap(),0,szFn);
1370     HeapFree(GetProcessHeap(),0,sznFn);
1371     return ret;
1372 }