dlls/winmm/mmio.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2 /*
   3  * MMIO functions
   4  *
   5  * Copyright 1998 Andrew Taylor
   6  * Copyright 1998 Ove Kåven
   7  * Copyright 2000,2002 Eric Pouech
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 /* Still to be done:
  25  *      + correct handling of global/local IOProcs (and temporary IOProcs)
  26  *      + mode of mmio objects is not used (read vs write vs readwrite)
  27  *      + thread safeness
  28  *      + 32 A <=> W message mapping
  29  */
  30
  31
  32 #include <ctype.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <errno.h>
  36 #include <assert.h>
  37
  38 #include "mmsystem.h"
  39 #include "windef.h"
  40 #include "heap.h"
  41 #include "winemm.h"
  42
  43 #include "wine/debug.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  46
  47 LRESULT         (*pFnMmioCallback16)(SEGPTR,LPMMIOINFO,UINT,LPARAM,LPARAM) /* = NULL */;
  48
  49 /**************************************************************************
  50  *                      mmioDosIOProc                           [internal]
  51  */
  52 static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
  53                                       LPARAM lParam1, LPARAM lParam2)
  54 {
  55     LRESULT     ret = MMSYSERR_NOERROR;
  56
  57     TRACE("(%p, %X, 0x%lx, 0x%lx);\n", lpmmioinfo, uMessage, lParam1, lParam2);
  58
  59     switch (uMessage) {
  60     case MMIOM_OPEN:
  61         {
  62             /* Parameters:
  63              * lParam1 = szFileName parameter from mmioOpen
  64              * lParam2 = reserved
  65              * Returns: zero on success, error code on error
  66              * NOTE: lDiskOffset automatically set to zero
  67              */
  68             LPCSTR      szFileName = (LPCSTR)lParam1;
  69
  70             if (lpmmioinfo->dwFlags & MMIO_GETTEMP) {
  71                 FIXME("MMIO_GETTEMP not implemented\n");
  72                 return MMIOERR_CANNOTOPEN;
  73             }
  74
  75             /* if filename NULL, assume open file handle in adwInfo[0] */
  76             if (szFileName) {
  77                 OFSTRUCT    ofs;
  78                 lpmmioinfo->adwInfo[0] = (DWORD)OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
  79             }
  80             if (lpmmioinfo->adwInfo[0] == (DWORD)HFILE_ERROR)
  81                 ret = MMIOERR_CANNOTOPEN;
  82         }
  83         break;
  84
  85     case MMIOM_CLOSE:
  86         /* Parameters:
  87          * lParam1 = wFlags parameter from mmioClose
  88          * lParam2 = unused
  89          * Returns: zero on success, error code on error
  90          */
  91         if (!(lParam1 & MMIO_FHOPEN))
  92             _lclose((HFILE)lpmmioinfo->adwInfo[0]);
  93         break;
  94
  95     case MMIOM_READ:
  96         /* Parameters:
  97          * lParam1 = huge pointer to read buffer
  98          * lParam2 = number of bytes to read
  99          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 100          *         in wErrorRet)
 101          */
 102         ret = _lread((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 103         if (ret != -1)
 104             lpmmioinfo->lDiskOffset += ret;
 105
 106         break;
 107
 108     case MMIOM_WRITE:
 109     case MMIOM_WRITEFLUSH:
 110         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 111
 112         /* Parameters:
 113          * lParam1 = huge pointer to write buffer
 114          * lParam2 = number of bytes to write
 115          * Returns: number of bytes written, -1 for error (error code in
 116          *              wErrorRet)
 117          */
 118         ret = _hwrite((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 119         if (ret != -1)
 120             lpmmioinfo->lDiskOffset += ret;
 121         break;
 122
 123     case MMIOM_SEEK:
 124         /* Parameters:
 125          * lParam1 = new position
 126          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 127          * Returns: new file postion, -1 on error
 128          */
 129         ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 130         if (ret != -1)
 131             lpmmioinfo->lDiskOffset = ret;
 132         return ret;
 133
 134     case MMIOM_RENAME:
 135         /* Parameters:
 136          * lParam1 = old name
 137          * lParam2 = new name
 138          * Returns: zero on success, non-zero on failure
 139          */
 140          if (!MoveFileA((const char*)lParam1, (const char*)lParam2))
 141              ret = MMIOERR_FILENOTFOUND;
 142          break;
 143
 144     default:
 145         FIXME("unexpected message %u\n", uMessage);
 146         return 0;
 147     }
 148
 149     return ret;
 150 }
 151
 152 /**************************************************************************
 153  *                      mmioMemIOProc                           [internal]
 154  */
 155 static LRESULT CALLBACK mmioMemIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 156                                       LPARAM lParam1, LPARAM lParam2)
 157 {
 158     TRACE("(%p,0x%04x,0x%08lx,0x%08lx)\n", lpmmioinfo, uMessage, lParam1, lParam2);
 159
 160     switch (uMessage) {
 161
 162     case MMIOM_OPEN:
 163         /* Parameters:
 164          * lParam1 = filename (must be NULL)
 165          * lParam2 = reserved
 166          * Returns: zero on success, error code on error
 167          * NOTE: lDiskOffset automatically set to zero
 168          */
 169         /* FIXME: io proc shouldn't change it */
 170         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 171             lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 172         lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 173         return 0;
 174
 175     case MMIOM_CLOSE:
 176         /* Parameters:
 177          * lParam1 = wFlags parameter from mmioClose
 178          * lParam2 = unused
 179          * Returns: zero on success, error code on error
 180          */
 181         return 0;
 182
 183     case MMIOM_READ:
 184         /* Parameters:
 185          * lParam1 = huge pointer to read buffer
 186          * lParam2 = number of bytes to read
 187          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 188          *         in wErrorRet)
 189          * NOTE: lDiskOffset should be updated
 190          */
 191         FIXME("MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 192         return 0;
 193
 194     case MMIOM_WRITE:
 195     case MMIOM_WRITEFLUSH:
 196         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 197
 198         /* Parameters:
 199          * lParam1 = huge pointer to write buffer
 200          * lParam2 = number of bytes to write
 201          * Returns: number of bytes written, -1 for error (error code in
 202          *              wErrorRet)
 203          * NOTE: lDiskOffset should be updated
 204          */
 205         FIXME("MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 206         return 0;
 207
 208     case MMIOM_SEEK:
 209         /* Parameters:
 210          * lParam1 = new position
 211          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 212          * Returns: new file postion, -1 on error
 213          * NOTE: lDiskOffset should be updated
 214          */
 215         FIXME("MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 216         return -1;
 217
 218     default:
 219         FIXME("unexpected message %u\n", uMessage);
 220         return 0;
 221     }
 222
 223     return 0;
 224 }
 225
 226 /* This array will be the entire list for most apps
 227  * Note that temporary ioProcs will be stored with a 0 fourCC code
 228  */
 229
 230 static struct IOProcList defaultProcs[] = {
 231     {&defaultProcs[1], FOURCC_DOS, (LPMMIOPROC)mmioDosIOProc, MMIO_PROC_32A, 0},
 232     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, MMIO_PROC_32A, 0},
 233 };
 234
 235 static struct IOProcList*       pIOProcListAnchor = &defaultProcs[0];
 236
 237 /****************************************************************
 238  *              MMIO_FindProcNode                       [INTERNAL]
 239  *
 240  * Finds the ProcList node associated with a given FOURCC code.
 241  */
 242 static struct IOProcList*       MMIO_FindProcNode(FOURCC fccIOProc)
 243 {
 244     struct IOProcList*  pListNode;
 245
 246     for (pListNode = pIOProcListAnchor; pListNode; pListNode = pListNode->pNext) {
 247         if (pListNode->fourCC == fccIOProc) {
 248             return pListNode;
 249         }
 250     }
 251     return NULL;
 252 }
 253
 254 /****************************************************************
 255  *              MMIO_InstallIOProc                      [INTERNAL]
 256  */
 257 LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 258                               DWORD dwFlags, enum mmioProcType type)
 259 {
 260     LPMMIOPROC          lpProc = NULL;
 261     struct IOProcList*  pListNode;
 262     struct IOProcList** ppListNode;
 263
 264     TRACE("(%ld, %p, %08lX, %i)\n", fccIOProc, pIOProc, dwFlags, type);
 265
 266     if (dwFlags & MMIO_GLOBALPROC)
 267         FIXME("Global procedures not implemented\n");
 268
 269     /* just handle the known procedures for now */
 270     switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 271     case MMIO_INSTALLPROC:
 272         /* Create new entry for the IOProc list */
 273         pListNode = HeapAlloc(GetProcessHeap(), 0, sizeof(*pListNode));
 274         if (pListNode) {
 275             /* Fill in this node */
 276             pListNode->fourCC = fccIOProc;
 277             pListNode->pIOProc = pIOProc;
 278             pListNode->type = type;
 279             pListNode->count = 0;
 280
 281             /* Stick it on the end of the list */
 282             pListNode->pNext = pIOProcListAnchor;
 283             pIOProcListAnchor = pListNode;
 284
 285             /* Return this IOProc - that's how the caller knows we succeeded */
 286             lpProc = pIOProc;
 287         }
 288         break;
 289
 290     case MMIO_REMOVEPROC:
 291         /*
 292          * Search for the node that we're trying to remove
 293          * We search for a matching fourCC code if it's non null, or the proc
 294          * address otherwise
 295          * note that this method won't find the first item on the list, but
 296          * since the first two items on this list are ones we won't
 297          * let the user delete anyway, that's okay
 298          */
 299         ppListNode = &pIOProcListAnchor;
 300         while ((*ppListNode) &&
 301                ((fccIOProc != 0) ?
 302                 (*ppListNode)->fourCC != fccIOProc :
 303                 (*ppListNode)->pIOProc != pIOProc))
 304             ppListNode = &((*ppListNode)->pNext);
 305
 306         if (*ppListNode) { /* found it */
 307             /* FIXME: what should be done if an open mmio object uses this proc ?
 308              * shall we return an error, nuke the mmio object ?
 309              */
 310             if ((*ppListNode)->count) {
 311                 ERR("Cannot remove a mmIOProc while in use\n");
 312                 break;
 313             }
 314             /* remove it, but only if it isn't builtin */
 315             if ((*ppListNode) >= defaultProcs &&
 316                 (*ppListNode) < defaultProcs + sizeof(defaultProcs)) {
 317                 WARN("Tried to remove built-in mmio proc. Skipping\n");
 318             } else {
 319                 /* Okay, nuke it */
 320                 struct IOProcList*  ptmpNode = *ppListNode;
 321                 lpProc = (*ppListNode)->pIOProc;
 322                 *ppListNode = (*ppListNode)->pNext;
 323                 HeapFree(GetProcessHeap(), 0, ptmpNode);
 324             }
 325         }
 326         break;
 327
 328     case MMIO_FINDPROC:
 329         if ((pListNode = MMIO_FindProcNode(fccIOProc))) {
 330             lpProc = pListNode->pIOProc;
 331         }
 332         break;
 333     }
 334
 335     return lpProc;
 336 }
 337
 338 /****************************************************************
 339  *              send_message                            [INTERNAL]
 340  */
 341 static LRESULT  send_message(struct IOProcList* ioProc, LPMMIOINFO mmioinfo,
 342                              DWORD wMsg, LPARAM lParam1,
 343                              LPARAM lParam2, enum mmioProcType type)
 344 {
 345     LRESULT             result = MMSYSERR_ERROR;
 346     LPARAM              lp1 = lParam1, lp2 = lParam2;
 347
 348     if (!ioProc) {
 349         ERR("brrr\n");
 350         result = MMSYSERR_INVALPARAM;
 351     }
 352
 353     switch (ioProc->type) {
 354     case MMIO_PROC_16:
 355         if (pFnMmioCallback16)
 356             result = pFnMmioCallback16((SEGPTR)ioProc->pIOProc,
 357                                        mmioinfo, wMsg, lp1, lp2);
 358         break;
 359     case MMIO_PROC_32A:
 360     case MMIO_PROC_32W:
 361         if (ioProc->type != type) {
 362             /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 363             FIXME("NIY 32 A<=>W mapping\n");
 364         }
 365         result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 366
 367 #if 0
 368         if (ioProc->type != type) {
 369             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 370         }
 371 #endif
 372         break;
 373     default:
 374         FIXME("Internal error\n");
 375     }
 376
 377     return result;
 378 }
 379
 380 /**************************************************************************
 381  *                              MMIO_ParseExtA                  [internal]
 382  *
 383  * Parses a filename for the extension.
 384  *
 385  * RETURNS
 386  *  The FOURCC code for the extension if found, else 0.
 387  */
 388 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 389 {
 390     /* Filenames are of the form file.ext+ABC
 391        FIXME: What if a '+' is part of the file name?
 392        For now, we take the last '+' present */
 393
 394     FOURCC ret = 0;
 395
 396     /* Note that ext{Start,End} point to the . and + respectively */
 397     LPSTR extEnd;
 398
 399     TRACE("(%s)\n", debugstr_a(szFileName));
 400
 401     if (!szFileName)
 402         return ret;
 403     extEnd = strrchr(szFileName,'+');
 404     if (extEnd) {
 405         /* Need to parse to find the extension */
 406         LPSTR extStart;
 407
 408         extStart = extEnd;
 409         while (extStart >= szFileName && extStart[0] != '.') {
 410             extStart--;
 411         }
 412
 413         if (extStart < szFileName) {
 414             ERR("+ but no . in szFileName: %s\n", debugstr_a(szFileName));
 415         } else {
 416             CHAR ext[5];
 417
 418             if (extEnd - extStart - 1 > 4)
 419                 WARN("Extension length > 4\n");
 420             lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 421             TRACE("Got extension: %s\n", debugstr_a(ext));
 422             /* FOURCC codes identifying file-extensions must be uppercase */
 423             ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 424         }
 425     }
 426     return ret;
 427 }
 428
 429 /**************************************************************************
 430  *                              MMIO_Get                        [internal]
 431  *
 432  * Retrieves the mmio object from current process
 433  */
 434 LPWINE_MMIO     MMIO_Get(HMMIO h)
 435 {
 436     LPWINE_MMIO         wm = NULL;
 437
 438     EnterCriticalSection(&WINMM_IData->cs);
 439     for (wm = WINMM_IData->lpMMIO; wm; wm = wm->lpNext) {
 440         if (wm->info.hmmio == h)
 441             break;
 442     }
 443     LeaveCriticalSection(&WINMM_IData->cs);
 444     return wm;
 445 }
 446
 447 /**************************************************************************
 448  *                              MMIO_Create                     [internal]
 449  *
 450  * Creates an internal representation for a mmio instance
 451  */
 452 static  LPWINE_MMIO             MMIO_Create(void)
 453 {
 454     static      WORD    MMIO_counter = 0;
 455     LPWINE_MMIO         wm;
 456
 457     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 458     if (wm) {
 459         EnterCriticalSection(&WINMM_IData->cs);
 460         /* lookup next unallocated WORD handle, with a non NULL value */
 461         while (++MMIO_counter == 0 || MMIO_Get(HMMIO_32(MMIO_counter)));
 462         wm->info.hmmio = HMMIO_32(MMIO_counter);
 463         wm->lpNext = WINMM_IData->lpMMIO;
 464         WINMM_IData->lpMMIO = wm;
 465         LeaveCriticalSection(&WINMM_IData->cs);
 466     }
 467     return wm;
 468 }
 469
 470 /**************************************************************************
 471  *                              MMIO_Destroy                    [internal]
 472  *-
 473  * Destroys an internal representation for a mmio instance
 474  */
 475 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 476 {
 477     LPWINE_MMIO*        m;
 478
 479     EnterCriticalSection(&WINMM_IData->cs);
 480     /* search for the matching one... */
 481     m = &(WINMM_IData->lpMMIO);
 482     while (*m && *m != wm) m = &(*m)->lpNext;
 483     /* ...and destroy */
 484     if (*m) {
 485         *m = (*m)->lpNext;
 486         HeapFree(GetProcessHeap(), 0, wm);
 487         wm = NULL;
 488     }
 489     LeaveCriticalSection(&WINMM_IData->cs);
 490     return wm ? FALSE : TRUE;
 491 }
 492
 493 /****************************************************************
 494  *                      MMIO_Flush                      [INTERNAL]
 495  */
 496 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 497 {
 498     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 499         /* not quite sure what to do here, but I'll guess */
 500         if (wm->info.dwFlags & MMIO_DIRTY) {
 501             /* FIXME: error handling */
 502             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 503                          wm->info.lBufOffset, SEEK_SET, MMIO_PROC_32A);
 504             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 505                          (LPARAM)wm->info.pchBuffer,
 506                          wm->info.pchNext - wm->info.pchBuffer, MMIO_PROC_32A);
 507         }
 508         if (uFlags & MMIO_EMPTYBUF)
 509             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 510     }
 511     wm->info.dwFlags &= ~MMIO_DIRTY;
 512
 513     return MMSYSERR_NOERROR;
 514 }
 515
 516 /***************************************************************************
 517  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 518  */
 519 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 520 {
 521     LONG        size = wm->info.cchBuffer;
 522
 523     TRACE("bo=%lx do=%lx of=%lx\n",
 524           wm->info.lBufOffset, wm->info.lDiskOffset,
 525           send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, MMIO_PROC_32A));
 526
 527     wm->info.lBufOffset = wm->info.lDiskOffset;
 528     wm->info.pchNext = wm->info.pchBuffer;
 529     wm->info.pchEndRead = wm->info.pchBuffer;
 530     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 531
 532     if (for_read) {
 533         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 534                             (LPARAM)wm->info.pchBuffer, size, MMIO_PROC_32A);
 535         if (size > 0)
 536             wm->info.pchEndRead += size;
 537     }
 538
 539     wm->bBufferLoaded = TRUE;
 540     return size;
 541 }
 542
 543 /***************************************************************************
 544  *                      MMIO_SetBuffer                          [INTERNAL]
 545  */
 546 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 547                                UINT uFlags)
 548 {
 549     TRACE("(%p %p %ld %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 550
 551     if (uFlags)                 return MMSYSERR_INVALPARAM;
 552     if (cchBuffer > 0xFFFF)
 553         WARN("Untested handling of huge mmio buffers (%ld >= 64k)\n", cchBuffer);
 554
 555     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 556         return MMIOERR_CANNOTWRITE;
 557
 558     /* free previous buffer if allocated */
 559     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 560         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 561         wm->info.pchBuffer = NULL;
 562         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 563     }
 564
 565     /* free segmented ptr mapping, if any */
 566     if (wm->info.dwReserved1 != 0L)
 567     {
 568         UnMapLS(wm->info.dwReserved1);
 569         wm->info.dwReserved1 = 0L;
 570     }
 571
 572     if (pchBuffer) {
 573         wm->info.pchBuffer = pchBuffer;
 574     } else if (cchBuffer) {
 575         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 576             return MMIOERR_OUTOFMEMORY;
 577         wm->info.dwFlags |= MMIO_ALLOCBUF;
 578     } else {
 579         wm->info.pchBuffer = NULL;
 580     }
 581
 582     wm->info.cchBuffer = cchBuffer;
 583     wm->info.pchNext = wm->info.pchBuffer;
 584     wm->info.pchEndRead = wm->info.pchBuffer;
 585     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 586     wm->info.lBufOffset = 0;
 587     wm->bBufferLoaded = FALSE;
 588
 589     return MMSYSERR_NOERROR;
 590 }
 591
 592 /**************************************************************************
 593  *                      MMIO_Open                               [internal]
 594  */
 595 HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags,
 596                 enum mmioProcType type)
 597 {
 598     LPWINE_MMIO         wm;
 599     MMIOINFO            mmioinfo;
 600
 601     TRACE("('%s', %p, %08lX, %d);\n", szFileName, refmminfo, dwOpenFlags, type);
 602
 603     if (!refmminfo) {
 604         refmminfo = &mmioinfo;
 605
 606         mmioinfo.fccIOProc = 0;
 607         mmioinfo.pIOProc = NULL;
 608         mmioinfo.pchBuffer = NULL;
 609         mmioinfo.cchBuffer = 0;
 610         type = MMIO_PROC_32A;
 611     }
 612
 613     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 614         char    buffer[MAX_PATH];
 615
 616         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 617             return (HMMIO16)FALSE;
 618         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == -1))
 619             return (HMMIO)FALSE;
 620         strcpy(szFileName, buffer);
 621         return (HMMIO)TRUE;
 622     }
 623
 624     if ((wm = MMIO_Create()) == NULL)
 625         return 0;
 626
 627     /* If both params are NULL, then parse the file name if available */
 628     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 629         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 630         /* Handle any unhandled/error case. Assume DOS file */
 631         if (wm->info.fccIOProc == 0)
 632             wm->info.fccIOProc = FOURCC_DOS;
 633         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 634         wm->bTmpIOProc = FALSE;
 635     }
 636     /* if just the four character code is present, look up IO proc */
 637     else if (refmminfo->pIOProc == NULL) {
 638         wm->info.fccIOProc = refmminfo->fccIOProc;
 639         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 640         wm->bTmpIOProc = FALSE;
 641     }
 642     /* if IO proc specified, use it and specified four character code */
 643     else {
 644         wm->info.fccIOProc = refmminfo->fccIOProc;
 645         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 646                            MMIO_INSTALLPROC, type);
 647         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 648         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 649         wm->bTmpIOProc = TRUE;
 650     }
 651
 652     wm->bBufferLoaded = FALSE;
 653     wm->ioProc->count++;
 654
 655     if (dwOpenFlags & MMIO_ALLOCBUF) {
 656         if ((refmminfo->wErrorRet = MMIO_SetBuffer(wm, NULL, MMIO_DEFAULTBUFFER, 0)))
 657             goto error1;
 658     } else if (wm->info.fccIOProc == FOURCC_MEM) {
 659         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 660         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 661             goto error1;
 662         wm->bBufferLoaded = TRUE;
 663     } /* else => unbuffered, wm->info.pchBuffer == NULL */
 664
 665     /* see mmioDosIOProc for that one */
 666     wm->info.adwInfo[0] = refmminfo->adwInfo[0];
 667     wm->info.dwFlags = dwOpenFlags;
 668
 669     /* call IO proc to actually open file */
 670     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 671                                         (LPARAM)szFileName, 0, MMIO_PROC_32A);
 672
 673     /* grab file size, when possible */
 674     wm->dwFileSize = GetFileSize((HANDLE)wm->info.adwInfo[0], NULL);
 675
 676     if (refmminfo->wErrorRet == 0)
 677         return wm->info.hmmio;
 678  error1:
 679     if (wm->ioProc) wm->ioProc->count--;
 680  error2:
 681     MMIO_Destroy(wm);
 682     return 0;
 683 }
 684
 685 /**************************************************************************
 686  *                              mmioOpenW                       [WINMM.@]
 687  */
 688 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 689                        DWORD dwOpenFlags)
 690 {
 691     HMMIO       ret;
 692     LPSTR       szFn = HEAP_strdupWtoA(GetProcessHeap(), 0, szFileName);
 693
 694     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, MMIO_PROC_32W);
 695
 696     HeapFree(GetProcessHeap(), 0, szFn);
 697     return ret;
 698 }
 699
 700 /**************************************************************************
 701  *                              mmioOpenA                       [WINMM.@]
 702  */
 703 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 704                        DWORD dwOpenFlags)
 705 {
 706     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, MMIO_PROC_32A);
 707 }
 708
 709 /**************************************************************************
 710  *                              mmioClose               [WINMM.@]
 711  */
 712 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 713 {
 714     LPWINE_MMIO wm;
 715     MMRESULT    result;
 716
 717     TRACE("(%p, %04X);\n", hmmio, uFlags);
 718
 719     if ((wm = MMIO_Get(hmmio)) == NULL)
 720         return MMSYSERR_INVALHANDLE;
 721
 722     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 723         return result;
 724
 725     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE,
 726                           uFlags, 0, MMIO_PROC_32A);
 727
 728     MMIO_SetBuffer(wm, NULL, 0, 0);
 729
 730     wm->ioProc->count--;
 731
 732     if (wm->bTmpIOProc)
 733         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 734                            MMIO_REMOVEPROC, wm->ioProc->type);
 735
 736     MMIO_Destroy(wm);
 737
 738     return result;
 739 }
 740
 741 /**************************************************************************
 742  *                              mmioRead                [WINMM.@]
 743  */
 744 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 745 {
 746     LPWINE_MMIO wm;
 747     LONG        count;
 748
 749     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 750
 751     if ((wm = MMIO_Get(hmmio)) == NULL)
 752         return -1;
 753
 754     /* unbuffered case first */
 755     if (!wm->info.pchBuffer)
 756         return send_message(wm->ioProc, &wm->info, MMIOM_READ,
 757                             (LPARAM)pch, cch, MMIO_PROC_32A);
 758
 759     /* first try from current buffer */
 760     if (wm->info.pchNext != wm->info.pchEndRead) {
 761         count = wm->info.pchEndRead - wm->info.pchNext;
 762         if (count > cch || count < 0) count = cch;
 763         memcpy(pch, wm->info.pchNext, count);
 764         wm->info.pchNext += count;
 765         pch += count;
 766         cch -= count;
 767     } else
 768         count = 0;
 769
 770     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 771         assert(wm->info.cchBuffer);
 772
 773         while (cch) {
 774             LONG size;
 775
 776             size = MMIO_GrabNextBuffer(wm, TRUE);
 777             if (size <= 0) break;
 778             if (size > cch) size = cch;
 779             memcpy(pch, wm->info.pchBuffer, size);
 780             wm->info.pchNext += size;
 781             pch += size;
 782             cch -= size;
 783             count += size;
 784         }
 785     }
 786
 787     TRACE("count=%ld\n", count);
 788     return count;
 789 }
 790
 791 /**************************************************************************
 792  *                              mmioWrite               [WINMM.@]
 793  */
 794 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 795 {
 796     LPWINE_MMIO wm;
 797     LONG        count;
 798
 799     TRACE("(%p, %p, %ld);\n", hmmio, pch, cch);
 800
 801     if ((wm = MMIO_Get(hmmio)) == NULL)
 802         return -1;
 803
 804     if (wm->info.cchBuffer) {
 805         LONG    bytesW = 0;
 806
 807         count = 0;
 808         while (cch) {
 809             if (wm->info.pchNext != wm->info.pchEndWrite) {
 810                 count = wm->info.pchEndWrite - wm->info.pchNext;
 811                 if (count > cch || count < 0) count = cch;
 812                 memcpy(wm->info.pchNext, pch, count);
 813                 wm->info.pchNext += count;
 814                 pch += count;
 815                 cch -= count;
 816                 bytesW += count;
 817                 wm->info.dwFlags |= MMIO_DIRTY;
 818             } else {
 819                 if (wm->info.fccIOProc == FOURCC_MEM) {
 820                     if (wm->info.adwInfo[0]) {
 821                         /* from where would we get the memory handle? */
 822                         FIXME("memory file expansion not implemented!\n");
 823                         break;
 824                     } else break;
 825                 }
 826             }
 827
 828             if (wm->info.pchNext == wm->info.pchEndWrite)
 829             {
 830                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 831                 MMIO_GrabNextBuffer(wm, FALSE);
 832             }
 833             else break;
 834         }
 835         count = bytesW;
 836     } else {
 837         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 838                              (LPARAM)pch, cch, MMIO_PROC_32A);
 839         wm->info.lBufOffset = wm->info.lDiskOffset;
 840     }
 841
 842     TRACE("bytes written=%ld\n", count);
 843     return count;
 844 }
 845
 846 /**************************************************************************
 847  *                              mmioSeek                [WINMM.@]
 848  */
 849 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 850 {
 851     LPWINE_MMIO wm;
 852     LONG        offset;
 853
 854     TRACE("(%p, %08lX, %d);\n", hmmio, lOffset, iOrigin);
 855
 856     if ((wm = MMIO_Get(hmmio)) == NULL)
 857         return MMSYSERR_INVALHANDLE;
 858
 859     /* not buffered, direct seek on file */
 860     if (!wm->info.pchBuffer)
 861         return send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 862                             lOffset, iOrigin, MMIO_PROC_32A);
 863
 864     switch (iOrigin) {
 865     case SEEK_SET:
 866         offset = lOffset;
 867         break;
 868     case SEEK_CUR:
 869         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 870         break;
 871     case SEEK_END:
 872         offset = ((wm->info.fccIOProc == FOURCC_MEM)? wm->info.cchBuffer : wm->dwFileSize) - lOffset;
 873         break;
 874     default:
 875         return -1;
 876     }
 877
 878     if (offset && offset >= wm->dwFileSize && wm->info.fccIOProc != FOURCC_MEM) {
 879         /* should check that write mode exists */
 880         if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 881             return -1;
 882         wm->info.lBufOffset = offset;
 883         wm->info.pchEndRead = wm->info.pchBuffer;
 884         wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 885         if ((wm->info.dwFlags & MMIO_RWMODE) == MMIO_READ) {
 886             wm->info.lDiskOffset = wm->dwFileSize;
 887         }
 888     } else if ((wm->info.cchBuffer > 0) &&
 889         ((offset < wm->info.lBufOffset) ||
 890          (offset >= wm->info.lBufOffset + wm->info.cchBuffer) ||
 891          !wm->bBufferLoaded)) {
 892         /* stay in same buffer ? */
 893         /* some memory mapped buffers are defined with -1 as a size */
 894
 895         /* condition to change buffer */
 896         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 897             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 898             /* this also sets the wm->info.lDiskOffset field */
 899             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 900                          (offset / wm->info.cchBuffer) * wm->info.cchBuffer,
 901                          SEEK_SET, MMIO_PROC_32A) == -1)
 902             return -1;
 903         MMIO_GrabNextBuffer(wm, TRUE);
 904     }
 905
 906     wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 907
 908     TRACE("=> %ld\n", offset);
 909     return offset;
 910 }
 911
 912 /**************************************************************************
 913  *                              mmioGetInfo             [WINMM.@]
 914  */
 915 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 916 {
 917     LPWINE_MMIO         wm;
 918
 919     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 920
 921     if ((wm = MMIO_Get(hmmio)) == NULL)
 922         return MMSYSERR_INVALHANDLE;
 923
 924     memcpy(lpmmioinfo, &wm->info, sizeof(MMIOINFO));
 925     /* don't expose 16 bit ioproc:s */
 926     if (wm->ioProc->type != MMIO_PROC_16)
 927         lpmmioinfo->pIOProc = wm->ioProc->pIOProc;
 928
 929     return MMSYSERR_NOERROR;
 930 }
 931
 932 /**************************************************************************
 933  *                              mmioSetInfo             [WINMM.@]
 934  */
 935 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 936 {
 937     LPWINE_MMIO         wm;
 938
 939     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 940
 941     if ((wm = MMIO_Get(hmmio)) == NULL)
 942         return MMSYSERR_INVALHANDLE;
 943
 944     /* check pointers coherence */
 945     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
 946         lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
 947         lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
 948         lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
 949         lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
 950         lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
 951         return MMSYSERR_INVALPARAM;
 952
 953     wm->info.pchNext = lpmmioinfo->pchNext;
 954     wm->info.pchEndRead = lpmmioinfo->pchEndRead;
 955
 956     return MMSYSERR_NOERROR;
 957 }
 958
 959 /**************************************************************************
 960 *                               mmioSetBuffer           [WINMM.@]
 961 */
 962 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
 963 {
 964     LPWINE_MMIO         wm;
 965
 966     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%ld, uFlags=%#08x)\n",
 967           hmmio, pchBuffer, cchBuffer, uFlags);
 968
 969     if ((wm = MMIO_Get(hmmio)) == NULL)
 970         return MMSYSERR_INVALHANDLE;
 971
 972     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
 973 }
 974
 975 /**************************************************************************
 976  *                              mmioFlush               [WINMM.@]
 977  */
 978 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
 979 {
 980     LPWINE_MMIO         wm;
 981
 982     TRACE("(%p, %04X)\n", hmmio, uFlags);
 983
 984     if ((wm = MMIO_Get(hmmio)) == NULL)
 985         return MMSYSERR_INVALHANDLE;
 986
 987     return MMIO_Flush(wm, uFlags);
 988 }
 989
 990 /**************************************************************************
 991  *                              mmioAdvance             [WINMM.@]
 992  */
 993 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 994 {
 995     LPWINE_MMIO         wm;
 996
 997     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
 998
 999     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1000      * here. be sure if you change something here to check mmioAdvance16 as well
1001      */
1002     if ((wm = MMIO_Get(hmmio)) == NULL)
1003         return MMSYSERR_INVALHANDLE;
1004
1005     if (!wm->info.cchBuffer)
1006         return MMIOERR_UNBUFFERED;
1007
1008     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1009         return MMSYSERR_INVALPARAM;
1010
1011     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1012     {
1013         send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
1014                      lpmmioinfo->lBufOffset, SEEK_SET, MMIO_PROC_32A);
1015         send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
1016                      (LPARAM)lpmmioinfo->pchBuffer,
1017                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, MMIO_PROC_32A);
1018         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1019     }
1020     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1021         return MMIOERR_CANNOTWRITE;
1022
1023     if (lpmmioinfo) {
1024         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1025                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1026     }
1027     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1028
1029     if (lpmmioinfo) {
1030         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1031         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1032             (wm->info.pchEndRead - wm->info.pchBuffer);
1033         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1034             (wm->info.pchEndWrite - wm->info.pchBuffer);
1035         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1036         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1037     }
1038     return MMSYSERR_NOERROR;
1039 }
1040
1041 /**************************************************************************
1042  *                              mmioStringToFOURCCA     [WINMM.@]
1043  */
1044 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1045 {
1046     CHAR cc[4];
1047     int i = 0;
1048
1049     for (i = 0; i < 4 && sz[i]; i++) {
1050         if (uFlags & MMIO_TOUPPER) {
1051             cc[i] = toupper(sz[i]);
1052         } else {
1053             cc[i] = sz[i];
1054         }
1055     }
1056
1057     /* Pad with spaces */
1058     while (i < 4) cc[i++] = ' ';
1059
1060     TRACE("Got '%.4s'\n",cc);
1061     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1062 }
1063
1064 /**************************************************************************
1065  *                              mmioStringToFOURCCW     [WINMM.@]
1066  */
1067 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1068 {
1069     LPSTR       szA = HEAP_strdupWtoA(GetProcessHeap(),0,sz);
1070     FOURCC      ret = mmioStringToFOURCCA(szA,uFlags);
1071
1072     HeapFree(GetProcessHeap(), 0, szA);
1073     return ret;
1074 }
1075
1076 /**************************************************************************
1077  *                              mmioInstallIOProcA         [WINMM.@]
1078  */
1079 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1080                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1081 {
1082     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32A);
1083 }
1084
1085 /**************************************************************************
1086  *                              mmioInstallIOProcW         [WINMM.@]
1087  */
1088 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1089                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1090 {
1091     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, MMIO_PROC_32W);
1092 }
1093
1094 /******************************************************************
1095  *              MMIO_SendMessage
1096  *
1097  *
1098  */
1099 LRESULT         MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1100                                  LPARAM lParam2, enum mmioProcType type)
1101 {
1102     LPWINE_MMIO         wm;
1103
1104     TRACE("(%p, %u, %ld, %ld, %d)\n", hmmio, uMessage, lParam1, lParam2, type);
1105
1106     if (uMessage < MMIOM_USER)
1107         return MMSYSERR_INVALPARAM;
1108
1109     if ((wm = MMIO_Get(hmmio)) == NULL)
1110         return MMSYSERR_INVALHANDLE;
1111
1112     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, type);
1113 }
1114
1115 /**************************************************************************
1116  *                              mmioSendMessage         [WINMM.@]
1117  */
1118 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1119                                LPARAM lParam1, LPARAM lParam2)
1120 {
1121     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, MMIO_PROC_32A);
1122 }
1123
1124 /**************************************************************************
1125  *                              mmioDescend             [WINMM.@]
1126  */
1127 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1128                             const MMCKINFO* lpckParent, UINT uFlags)
1129 {
1130     DWORD               dwOldPos;
1131     FOURCC              srchCkId;
1132     FOURCC              srchType;
1133
1134
1135     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1136
1137     if (lpck == NULL)
1138         return MMSYSERR_INVALPARAM;
1139
1140     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1141     TRACE("dwOldPos=%ld\n", dwOldPos);
1142
1143     if (lpckParent != NULL) {
1144         TRACE("seek inside parent at %ld !\n", lpckParent->dwDataOffset);
1145         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1146         if (dwOldPos < lpckParent->dwDataOffset ||
1147             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1148             WARN("outside parent chunk\n");
1149             return MMIOERR_CHUNKNOTFOUND;
1150         }
1151     }
1152
1153     /* The SDK docu says 'ckid' is used for all cases. Real World
1154      * examples disagree -Marcus,990216.
1155      */
1156
1157     srchType = 0;
1158     /* find_chunk looks for 'ckid' */
1159     if (uFlags & MMIO_FINDCHUNK)
1160         srchCkId = lpck->ckid;
1161     /* find_riff and find_list look for 'fccType' */
1162     if (uFlags & MMIO_FINDLIST) {
1163         srchCkId = FOURCC_LIST;
1164         srchType = lpck->fccType;
1165     }
1166     if (uFlags & MMIO_FINDRIFF) {
1167         srchCkId = FOURCC_RIFF;
1168         srchType = lpck->fccType;
1169     }
1170
1171     if (uFlags & (MMIO_FINDCHUNK|MMIO_FINDLIST|MMIO_FINDRIFF)) {
1172         TRACE("searching for %.4s.%.4s\n",
1173               (LPSTR)&srchCkId,
1174               srchType?(LPSTR)&srchType:"any ");
1175
1176         while (TRUE) {
1177             LONG ix;
1178
1179             ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1180             if (ix < 2*sizeof(DWORD)) {
1181                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1182                 WARN("return ChunkNotFound\n");
1183                 return MMIOERR_CHUNKNOTFOUND;
1184             }
1185             lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1186             if (ix < lpck->dwDataOffset - dwOldPos) {
1187                 mmioSeek(hmmio, dwOldPos, SEEK_SET);
1188                 WARN("return ChunkNotFound\n");
1189                 return MMIOERR_CHUNKNOTFOUND;
1190             }
1191             TRACE("ckid=%.4s fcc=%.4s cksize=%08lX !\n",
1192                   (LPSTR)&lpck->ckid,
1193                   srchType?(LPSTR)&lpck->fccType:"<na>",
1194                   lpck->cksize);
1195             if ((srchCkId == lpck->ckid) &&
1196                 (!srchType || (srchType == lpck->fccType))
1197                 )
1198                 break;
1199
1200             dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1201             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1202         }
1203     } else {
1204         /* FIXME: unverified, does it do this? */
1205         /* NB: This part is used by WAVE_mciOpen, among others */
1206         if (mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD)) < 3 * sizeof(DWORD)) {
1207             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1208             WARN("return ChunkNotFound 2nd\n");
1209             return MMIOERR_CHUNKNOTFOUND;
1210         }
1211         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1212     }
1213     lpck->dwFlags = 0;
1214     /* If we were looking for RIFF/LIST chunks, the final file position
1215      * is after the chunkid. If we were just looking for the chunk
1216      * it is after the cksize. So add 4 in RIFF/LIST case.
1217      */
1218     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1219         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1220     else
1221         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1222     TRACE("lpck: ckid=%.4s, cksize=%ld, dwDataOffset=%ld fccType=%08lX (%.4s)!\n",
1223           (LPSTR)&lpck->ckid, lpck->cksize, lpck->dwDataOffset,
1224           lpck->fccType, srchType?(LPSTR)&lpck->fccType:"");
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=%ld lpck->dwDataOffset = %ld\n", dwOldPos, lpck->dwDataOffset);
1241         dwNewSize = dwOldPos - lpck->dwDataOffset;
1242         if (dwNewSize != lpck->cksize) {
1243             TRACE("Nope: lpck->cksize=%ld dwNewSize=%ld\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=%ld\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=%.4s\n", (LPSTR)&lpck->ckid);
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 = %ld req = %ld, 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                             MMIOINFO* lpmmioinfo, DWORD dwFlags)
1306 {
1307     struct IOProcList*  ioProc = NULL;
1308     struct IOProcList   tmp;
1309
1310     TRACE("('%s', '%s', %p, %08lX);\n",
1311           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1312
1313     /* If both params are NULL, then parse the file name */
1314     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1315         lpmmioinfo->fccIOProc = MMIO_ParseExtA(szFileName);
1316
1317     /* Handle any unhandled/error case from above. Assume DOS file */
1318     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL))
1319         ioProc = MMIO_FindProcNode(FOURCC_DOS);
1320     /* if just the four character code is present, look up IO proc */
1321     else if (lpmmioinfo->pIOProc == NULL)
1322         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1323     else /* use relevant ioProc */
1324     {
1325         ioProc = &tmp;
1326         tmp.fourCC = lpmmioinfo->fccIOProc;
1327         tmp.pIOProc = lpmmioinfo->pIOProc;
1328         tmp.type = MMIO_PROC_32A;
1329         tmp.count = 1;
1330     }
1331
1332     return send_message(ioProc, lpmmioinfo, MMIOM_RENAME,
1333                         (LPARAM)szFileName, (LPARAM)szNewFileName, MMIO_PROC_32A);
1334 }
1335
1336 /**************************************************************************
1337  *                              mmioRenameW                     [WINMM.@]
1338  */
1339 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1340                             MMIOINFO* lpmmioinfo, DWORD dwFlags)
1341 {
1342     LPSTR       szFn = HEAP_strdupWtoA(GetProcessHeap(), 0, szFileName);
1343     LPSTR       sznFn = HEAP_strdupWtoA(GetProcessHeap(), 0, szNewFileName);
1344     UINT        ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1345
1346     HeapFree(GetProcessHeap(),0,szFn);
1347     HeapFree(GetProcessHeap(),0,sznFn);
1348     return ret;
1349 }