dlls/winmm/mmio.c

   1 /*
   2  * MMIO functions
   3  *
   4  * Copyright 1998 Andrew Taylor
   5  * Copyright 1998 Ove Kåven
   6  * Copyright 2000,2002 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /* Still to be done:
  24  *      + correct handling of global/local IOProcs (and temporary IOProcs)
  25  *      + mode of mmio objects is not used (read vs write vs readwrite)
  26  *      + thread safeness
  27  *      + 32 A <=> W message mapping
  28  */
  29
  30
  31 #include <ctype.h>
  32 #include <stdarg.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <errno.h>
  36 #include <assert.h>
  37
  38 #include "windef.h"
  39 #include "winbase.h"
  40 #include "winnls.h"
  41 #include "winternl.h"
  42 #include "mmsystem.h"
  43 #include "winemm.h"
  44
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(mmio);
  48
  49 static WINE_MMIO *MMIOList;
  50
  51 /* From kernel32 */
  52 static HANDLE create_file_OF( LPCSTR path, INT mode )
  53 {
  54     DWORD access, sharing, creation;
  55     char full_path[MAX_PATH];
  56
  57     if (mode & OF_CREATE)
  58     {
  59         creation = CREATE_ALWAYS;
  60         access = GENERIC_READ | GENERIC_WRITE;
  61     }
  62     else
  63     {
  64         creation = OPEN_EXISTING;
  65         switch(mode & 0x03)
  66         {
  67         case OF_READ:      access = GENERIC_READ; break;
  68         case OF_WRITE:     access = GENERIC_WRITE; break;
  69         case OF_READWRITE: access = GENERIC_READ | GENERIC_WRITE; break;
  70         default:           access = 0; break;
  71         }
  72     }
  73
  74     switch(mode & 0x70)
  75     {
  76     case OF_SHARE_EXCLUSIVE:  sharing = 0; break;
  77     case OF_SHARE_DENY_WRITE: sharing = FILE_SHARE_READ; break;
  78     case OF_SHARE_DENY_READ:  sharing = FILE_SHARE_WRITE; break;
  79     case OF_SHARE_DENY_NONE:
  80     case OF_SHARE_COMPAT:
  81     default:                  sharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
  82     }
  83
  84     if (mode & OF_CREATE)
  85         return CreateFileA( path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
  86
  87     if (!SearchPathA( NULL, path, NULL, MAX_PATH, full_path, NULL ))
  88         return INVALID_HANDLE_VALUE;
  89     return CreateFileA( full_path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
  90 }
  91
  92 /**************************************************************************
  93  *                      mmioDosIOProc                           [internal]
  94  */
  95 static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
  96                                       LPARAM lParam1, LPARAM lParam2)
  97 {
  98     LRESULT     ret = MMSYSERR_NOERROR;
  99
 100     TRACE("(%p, %X, 0x%lx, 0x%lx);\n", lpmmioinfo, uMessage, lParam1, lParam2);
 101
 102     switch (uMessage) {
 103     case MMIOM_OPEN:
 104         {
 105             /* Parameters:
 106              * lParam1 = szFileName parameter from mmioOpen
 107              * lParam2 = reserved
 108              * Returns: zero on success, error code on error
 109              * NOTE: lDiskOffset automatically set to zero
 110              */
 111             LPCSTR      szFileName = (LPCSTR)lParam1;
 112
 113             if (lpmmioinfo->dwFlags & MMIO_GETTEMP) {
 114                 FIXME("MMIO_GETTEMP not implemented\n");
 115                 return MMIOERR_CANNOTOPEN;
 116             }
 117
 118             /* if filename NULL, assume open file handle in adwInfo[0] */
 119             if (szFileName) {
 120                 HANDLE file;
 121
 122                 file = create_file_OF( szFileName, lpmmioinfo->dwFlags );
 123                 if (file != INVALID_HANDLE_VALUE)
 124                     lpmmioinfo->adwInfo[0] = HandleToLong(file);
 125                 else
 126                     lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 127             }
 128             if (lpmmioinfo->adwInfo[0] == HFILE_ERROR)
 129                 ret = MMIOERR_FILENOTFOUND;
 130         }
 131         break;
 132
 133     case MMIOM_CLOSE:
 134         /* Parameters:
 135          * lParam1 = wFlags parameter from mmioClose
 136          * lParam2 = unused
 137          * Returns: zero on success, error code on error
 138          */
 139         if (!(lParam1 & MMIO_FHOPEN))
 140             _lclose((HFILE)lpmmioinfo->adwInfo[0]);
 141         break;
 142
 143     case MMIOM_READ:
 144         /* Parameters:
 145          * lParam1 = huge pointer to read buffer
 146          * lParam2 = number of bytes to read
 147          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 148          *         in wErrorRet)
 149          */
 150         ret = _lread((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 151         if (ret != -1)
 152             lpmmioinfo->lDiskOffset += ret;
 153
 154         break;
 155
 156     case MMIOM_WRITE:
 157     case MMIOM_WRITEFLUSH:
 158         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 159
 160         /* Parameters:
 161          * lParam1 = huge pointer to write buffer
 162          * lParam2 = number of bytes to write
 163          * Returns: number of bytes written, -1 for error (error code in
 164          *              wErrorRet)
 165          */
 166         ret = _hwrite((HFILE)lpmmioinfo->adwInfo[0], (HPSTR)lParam1, (LONG)lParam2);
 167         if (ret != -1)
 168             lpmmioinfo->lDiskOffset += ret;
 169         break;
 170
 171     case MMIOM_SEEK:
 172         /* Parameters:
 173          * lParam1 = new position
 174          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 175          * Returns: new file position, -1 on error
 176          */
 177         if (lParam2 == SEEK_END)
 178             ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], -(LONG)lParam1, (LONG)lParam2);
 179         else
 180             ret = _llseek((HFILE)lpmmioinfo->adwInfo[0], (LONG)lParam1, (LONG)lParam2);
 181         if (ret != -1)
 182             lpmmioinfo->lDiskOffset = ret;
 183         return ret;
 184
 185     case MMIOM_RENAME:
 186         /* Parameters:
 187          * lParam1 = old name
 188          * lParam2 = new name
 189          * Returns: zero on success, non-zero on failure
 190          */
 191          if (!MoveFileA((const char*)lParam1, (const char*)lParam2))
 192              ret = MMIOERR_FILENOTFOUND;
 193          break;
 194
 195     default:
 196         FIXME("unexpected message %u\n", uMessage);
 197         return 0;
 198     }
 199
 200     return ret;
 201 }
 202
 203 /**************************************************************************
 204  *                      mmioMemIOProc                           [internal]
 205  */
 206 static LRESULT CALLBACK mmioMemIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
 207                                       LPARAM lParam1, LPARAM lParam2)
 208 {
 209     TRACE("(%p,0x%04x,0x%08lx,0x%08lx)\n", lpmmioinfo, uMessage, lParam1, lParam2);
 210
 211     switch (uMessage) {
 212
 213     case MMIOM_OPEN:
 214         /* Parameters:
 215          * lParam1 = filename (must be NULL)
 216          * lParam2 = reserved
 217          * Returns: zero on success, error code on error
 218          * NOTE: lDiskOffset automatically set to zero
 219          */
 220         /* FIXME: io proc shouldn't change it */
 221         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 222             lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 223         lpmmioinfo->adwInfo[0] = HFILE_ERROR;
 224         return 0;
 225
 226     case MMIOM_CLOSE:
 227         /* Parameters:
 228          * lParam1 = wFlags parameter from mmioClose
 229          * lParam2 = unused
 230          * Returns: zero on success, error code on error
 231          */
 232         return 0;
 233
 234     case MMIOM_READ:
 235         /* Parameters:
 236          * lParam1 = huge pointer to read buffer
 237          * lParam2 = number of bytes to read
 238          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 239          *         in wErrorRet)
 240          * NOTE: lDiskOffset should be updated
 241          */
 242         FIXME("MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 243         return 0;
 244
 245     case MMIOM_WRITE:
 246     case MMIOM_WRITEFLUSH:
 247         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 248
 249         /* Parameters:
 250          * lParam1 = huge pointer to write buffer
 251          * lParam2 = number of bytes to write
 252          * Returns: number of bytes written, -1 for error (error code in
 253          *              wErrorRet)
 254          * NOTE: lDiskOffset should be updated
 255          */
 256         FIXME("MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 257         return 0;
 258
 259     case MMIOM_SEEK:
 260         /* Parameters:
 261          * lParam1 = new position
 262          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 263          * Returns: new file position, -1 on error
 264          * NOTE: lDiskOffset should be updated
 265          */
 266         FIXME("MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 267         return -1;
 268
 269     default:
 270         FIXME("unexpected message %u\n", uMessage);
 271         return 0;
 272     }
 273 }
 274
 275 /* This array will be the entire list for most apps
 276  * Note that temporary ioProcs will be stored with a 0 fourCC code
 277  */
 278
 279 static struct IOProcList defaultProcs[] = {
 280     {&defaultProcs[1], FOURCC_DOS, (LPMMIOPROC)mmioDosIOProc, FALSE, 0},
 281     {NULL,             FOURCC_MEM, (LPMMIOPROC)mmioMemIOProc, FALSE, 0},
 282 };
 283
 284 static struct IOProcList*       pIOProcListAnchor = &defaultProcs[0];
 285
 286 /****************************************************************
 287  *              MMIO_FindProcNode                       [INTERNAL]
 288  *
 289  * Finds the ProcList node associated with a given FOURCC code.
 290  */
 291 static struct IOProcList*       MMIO_FindProcNode(FOURCC fccIOProc)
 292 {
 293     struct IOProcList*  pListNode;
 294
 295     for (pListNode = pIOProcListAnchor; pListNode; pListNode = pListNode->pNext) {
 296         if (pListNode->fourCC == fccIOProc) {
 297             return pListNode;
 298         }
 299     }
 300     return NULL;
 301 }
 302
 303 /****************************************************************
 304  *              MMIO_InstallIOProc                      [INTERNAL]
 305  */
 306 static LPMMIOPROC MMIO_InstallIOProc(FOURCC fccIOProc, LPMMIOPROC pIOProc,
 307                                      DWORD dwFlags, BOOL is_unicode)
 308 {
 309     LPMMIOPROC          lpProc = NULL;
 310     struct IOProcList*  pListNode;
 311     struct IOProcList** ppListNode;
 312
 313     TRACE("(%08x, %p, %08X, %s)\n", fccIOProc, pIOProc, dwFlags, is_unicode ? "unicode" : "ansi");
 314
 315     if (dwFlags & MMIO_GLOBALPROC)
 316         FIXME("Global procedures not implemented\n");
 317
 318     /* just handle the known procedures for now */
 319     switch (dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 320     case MMIO_INSTALLPROC:
 321         /* Create new entry for the IOProc list */
 322         pListNode = HeapAlloc(GetProcessHeap(), 0, sizeof(*pListNode));
 323         if (pListNode) {
 324             /* Fill in this node */
 325             pListNode->fourCC = fccIOProc;
 326             pListNode->pIOProc = pIOProc;
 327             pListNode->is_unicode = is_unicode;
 328             pListNode->count = 0;
 329
 330             /* Stick it on the end of the list */
 331             pListNode->pNext = pIOProcListAnchor;
 332             pIOProcListAnchor = pListNode;
 333
 334             /* Return this IOProc - that's how the caller knows we succeeded */
 335             lpProc = pIOProc;
 336         }
 337         break;
 338
 339     case MMIO_REMOVEPROC:
 340         /*
 341          * Search for the node that we're trying to remove
 342          * We search for a matching fourCC code if it's non null, or the proc
 343          * address otherwise
 344          * note that this method won't find the first item on the list, but
 345          * since the first two items on this list are ones we won't
 346          * let the user delete anyway, that's okay
 347          */
 348         ppListNode = &pIOProcListAnchor;
 349         while ((*ppListNode) &&
 350                ((fccIOProc != 0) ?
 351                 (*ppListNode)->fourCC != fccIOProc :
 352                 (*ppListNode)->pIOProc != pIOProc))
 353             ppListNode = &((*ppListNode)->pNext);
 354
 355         if (*ppListNode) { /* found it */
 356             /* FIXME: what should be done if an open mmio object uses this proc ?
 357              * shall we return an error, nuke the mmio object ?
 358              */
 359             if ((*ppListNode)->count) {
 360                 ERR("Cannot remove a mmIOProc while in use\n");
 361                 break;
 362             }
 363             /* remove it, but only if it isn't builtin */
 364             if ((*ppListNode) >= defaultProcs &&
 365                 (*ppListNode) < defaultProcs + ARRAY_SIZE(defaultProcs)) {
 366                 WARN("Tried to remove built-in mmio proc. Skipping\n");
 367             } else {
 368                 /* Okay, nuke it */
 369                 struct IOProcList*  ptmpNode = *ppListNode;
 370                 lpProc = (*ppListNode)->pIOProc;
 371                 *ppListNode = (*ppListNode)->pNext;
 372                 HeapFree(GetProcessHeap(), 0, ptmpNode);
 373             }
 374         }
 375         break;
 376
 377     case MMIO_FINDPROC:
 378         if ((pListNode = MMIO_FindProcNode(fccIOProc))) {
 379             lpProc = pListNode->pIOProc;
 380         }
 381         break;
 382     }
 383
 384     return lpProc;
 385 }
 386
 387 /****************************************************************
 388  *              send_message                            [INTERNAL]
 389  */
 390 static LRESULT  send_message(struct IOProcList* ioProc, LPMMIOINFO mmioinfo,
 391                              DWORD wMsg, LPARAM lParam1,
 392                              LPARAM lParam2, BOOL is_unicode)
 393 {
 394     LRESULT             result = MMSYSERR_ERROR;
 395     LPARAM              lp1 = lParam1, lp2 = lParam2;
 396
 397     if (!ioProc) {
 398         ERR("ioProc NULL\n");
 399         return MMSYSERR_INVALPARAM;
 400     }
 401
 402     if (ioProc->is_unicode != is_unicode) {
 403         /* map (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 404         FIXME("NIY 32 A<=>W mapping\n");
 405     }
 406     result = (ioProc->pIOProc)((LPSTR)mmioinfo, wMsg, lp1, lp2);
 407
 408 #if 0
 409     if (ioProc->is_unicode != is_unicode) {
 410             /* unmap (lParam1, lParam2) into (lp1, lp2) 32 A<=>W */
 411         }
 412 #endif
 413
 414     return result;
 415 }
 416
 417 /**************************************************************************
 418  *                              MMIO_ParseExtA                  [internal]
 419  *
 420  * Parses a filename for the extension.
 421  *
 422  * RETURNS
 423  *  The FOURCC code for the extension if found, else 0.
 424  */
 425 static FOURCC MMIO_ParseExtA(LPCSTR szFileName)
 426 {
 427     /* Filenames are of the form file.ext{+ABC}
 428        For now, we take the last '+' if present */
 429
 430     FOURCC ret = 0;
 431
 432     /* Note that ext{Start,End} point to the . and + respectively */
 433     LPCSTR extEnd;
 434     LPCSTR extStart;
 435
 436     CHAR ext[5];
 437
 438     TRACE("(%s)\n", debugstr_a(szFileName));
 439
 440     if (!szFileName)
 441         return ret;
 442
 443     /* Find the last '+' */
 444     extEnd = strrchr(szFileName,'+');
 445
 446     if (!extEnd) {
 447          /* No + so just an extension */
 448          return ret;
 449     } else {
 450         /* Find the first '.' before '+' */
 451         extStart = extEnd - 1;
 452         while (extStart >= szFileName && *extStart != '.') {
 453             extStart--;
 454         }
 455         if (extStart < szFileName) {
 456             ERR("No extension in szFileName: %s\n", debugstr_a(szFileName));
 457             return ret;
 458         }
 459     }
 460
 461     if (extEnd - extStart - 1 > 4)
 462         WARN("Extension length > 4\n");
 463     lstrcpynA(ext, extStart + 1, min(extEnd-extStart,5));
 464
 465     TRACE("Got extension: %s\n", debugstr_a(ext));
 466
 467     /* FOURCC codes identifying file-extensions must be uppercase */
 468     ret = mmioStringToFOURCCA(ext, MMIO_TOUPPER);
 469
 470     return ret;
 471 }
 472
 473 /**************************************************************************
 474  *                              MMIO_Get                        [internal]
 475  *
 476  * Retrieves the mmio object from current process
 477  */
 478 static LPWINE_MMIO      MMIO_Get(HMMIO h)
 479 {
 480     LPWINE_MMIO         wm = NULL;
 481
 482     EnterCriticalSection(&WINMM_cs);
 483     for (wm = MMIOList; wm; wm = wm->lpNext) {
 484         if (wm->info.hmmio == h)
 485             break;
 486     }
 487     LeaveCriticalSection(&WINMM_cs);
 488     return wm;
 489 }
 490
 491 /**************************************************************************
 492  *                              MMIO_Create                     [internal]
 493  *
 494  * Creates an internal representation for a mmio instance
 495  */
 496 static  LPWINE_MMIO             MMIO_Create(void)
 497 {
 498     static      WORD    MMIO_counter = 0;
 499     LPWINE_MMIO         wm;
 500
 501     wm = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WINE_MMIO));
 502     if (wm) {
 503         EnterCriticalSection(&WINMM_cs);
 504         /* lookup next unallocated WORD handle, with a non NULL value */
 505         while (++MMIO_counter == 0 || MMIO_Get((HMMIO)(ULONG_PTR)MMIO_counter));
 506         wm->info.hmmio = (HMMIO)(ULONG_PTR)MMIO_counter;
 507         wm->lpNext = MMIOList;
 508         MMIOList = wm;
 509         LeaveCriticalSection(&WINMM_cs);
 510     }
 511     return wm;
 512 }
 513
 514 /**************************************************************************
 515  *                              MMIO_Destroy                    [internal]
 516  *-
 517  * Destroys an internal representation for a mmio instance
 518  */
 519 static  BOOL            MMIO_Destroy(LPWINE_MMIO wm)
 520 {
 521     LPWINE_MMIO*        m;
 522
 523     EnterCriticalSection(&WINMM_cs);
 524     /* search for the matching one... */
 525     m = &MMIOList;
 526     while (*m && *m != wm) m = &(*m)->lpNext;
 527     /* ...and destroy */
 528     if (*m) {
 529         *m = (*m)->lpNext;
 530         HeapFree(GetProcessHeap(), 0, wm);
 531         wm = NULL;
 532     }
 533     LeaveCriticalSection(&WINMM_cs);
 534     return !wm;
 535 }
 536
 537 /****************************************************************
 538  *                      MMIO_Flush                      [INTERNAL]
 539  */
 540 static  MMRESULT MMIO_Flush(WINE_MMIO* wm, UINT uFlags)
 541 {
 542     if (wm->info.cchBuffer && (wm->info.fccIOProc != FOURCC_MEM)) {
 543         /* not quite sure what to do here, but I'll guess */
 544         if (wm->info.dwFlags & MMIO_DIRTY) {
 545             /* FIXME: error handling */
 546             send_message(wm->ioProc, &wm->info, MMIOM_SEEK, wm->info.lBufOffset, SEEK_SET, FALSE);
 547             send_message(wm->ioProc, &wm->info, MMIOM_WRITE,
 548                          (LPARAM)wm->info.pchBuffer,
 549                          wm->info.pchNext - wm->info.pchBuffer, FALSE);
 550         }
 551         if (uFlags & MMIO_EMPTYBUF)
 552             wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 553     }
 554     wm->info.dwFlags &= ~MMIO_DIRTY;
 555
 556     return MMSYSERR_NOERROR;
 557 }
 558
 559 /***************************************************************************
 560  *                      MMIO_GrabNextBuffer                     [INTERNAL]
 561  */
 562 static LONG     MMIO_GrabNextBuffer(LPWINE_MMIO wm, int for_read)
 563 {
 564     LONG        size = wm->info.cchBuffer;
 565
 566     TRACE("bo=%x do=%x\n",
 567           wm->info.lBufOffset, wm->info.lDiskOffset);
 568
 569     wm->info.lBufOffset = wm->info.lDiskOffset;
 570     wm->info.pchNext = wm->info.pchBuffer;
 571     wm->info.pchEndRead = wm->info.pchBuffer;
 572     wm->info.pchEndWrite = wm->info.pchBuffer + wm->info.cchBuffer;
 573
 574     wm->bBufferLoaded = TRUE;
 575     if (for_read) {
 576         size = send_message(wm->ioProc, &wm->info, MMIOM_READ,
 577                             (LPARAM)wm->info.pchBuffer, size, FALSE);
 578         if (size > 0)
 579             wm->info.pchEndRead += size;
 580         else
 581             wm->bBufferLoaded = FALSE;
 582     }
 583
 584     return size;
 585 }
 586
 587 /***************************************************************************
 588  *                      MMIO_SetBuffer                          [INTERNAL]
 589  */
 590 static MMRESULT MMIO_SetBuffer(WINE_MMIO* wm, void* pchBuffer, LONG cchBuffer,
 591                                UINT uFlags)
 592 {
 593     TRACE("(%p %p %d %u)\n", wm, pchBuffer, cchBuffer, uFlags);
 594
 595     if (cchBuffer > 0xFFFF)
 596         WARN("Untested handling of huge mmio buffers (%d >= 64k)\n", cchBuffer);
 597
 598     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
 599         return MMIOERR_CANNOTWRITE;
 600
 601     /* free previous buffer if allocated */
 602     if (wm->info.dwFlags & MMIO_ALLOCBUF) {
 603         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 604         wm->info.pchBuffer = NULL;
 605         wm->info.dwFlags &= ~MMIO_ALLOCBUF;
 606     }
 607
 608     if (pchBuffer) {
 609         wm->info.pchBuffer = pchBuffer;
 610     } else if (cchBuffer) {
 611         if (!(wm->info.pchBuffer = HeapAlloc(GetProcessHeap(), 0, cchBuffer)))
 612             return MMIOERR_OUTOFMEMORY;
 613         wm->info.dwFlags |= MMIO_ALLOCBUF;
 614     } else {
 615         wm->info.pchBuffer = NULL;
 616     }
 617
 618     wm->info.cchBuffer = cchBuffer;
 619     wm->info.pchNext = wm->info.pchBuffer;
 620     wm->info.pchEndRead = wm->info.pchBuffer;
 621     wm->info.pchEndWrite = wm->info.pchBuffer + cchBuffer;
 622     wm->info.lBufOffset = wm->info.lDiskOffset;
 623     wm->bBufferLoaded = (wm->info.fccIOProc == FOURCC_MEM);
 624
 625     return MMSYSERR_NOERROR;
 626 }
 627
 628 /**************************************************************************
 629  *                      MMIO_Open                               [internal]
 630  */
 631 static HMMIO MMIO_Open(LPSTR szFileName, MMIOINFO* refmminfo, DWORD dwOpenFlags, BOOL is_unicode)
 632 {
 633     LPWINE_MMIO         wm;
 634     MMIOINFO            mmioinfo;
 635     DWORD               pos;
 636
 637     TRACE("(%s, %p, %08X, %s);\n", debugstr_a(szFileName), refmminfo, dwOpenFlags, is_unicode ? "unicode" : "ansi");
 638
 639     if (!refmminfo) {
 640         refmminfo = &mmioinfo;
 641         memset(&mmioinfo, 0, sizeof(mmioinfo));
 642         is_unicode = FALSE;
 643     }
 644
 645     if (dwOpenFlags & (MMIO_PARSE|MMIO_EXIST)) {
 646         char    buffer[MAX_PATH];
 647
 648         if (!szFileName)
 649             return (HMMIO)FALSE;
 650         if (GetFullPathNameA(szFileName, sizeof(buffer), buffer, NULL) >= sizeof(buffer))
 651             return (HMMIO)FALSE;
 652         if ((dwOpenFlags & MMIO_EXIST) && (GetFileAttributesA(buffer) == INVALID_FILE_ATTRIBUTES))
 653             return (HMMIO)FALSE;
 654         strcpy(szFileName, buffer);
 655         return (HMMIO)TRUE;
 656     }
 657
 658     if ((wm = MMIO_Create()) == NULL)
 659         return 0;
 660
 661     /* If both params are NULL, then parse the file name if available */
 662     if (refmminfo->fccIOProc == 0 && refmminfo->pIOProc == NULL) {
 663         wm->info.fccIOProc = MMIO_ParseExtA(szFileName);
 664         /* Handle any unhandled/error case. Assume DOS file */
 665         if (wm->info.fccIOProc == 0) {
 666             wm->info.fccIOProc = FOURCC_DOS;
 667             wm->ioProc = &defaultProcs[0];
 668         }
 669         else if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) {
 670             /* If not found, assume DOS file */
 671             wm->ioProc = &defaultProcs[0];
 672         }
 673         wm->bTmpIOProc = FALSE;
 674     }
 675     /* if just the four character code is present, look up IO proc */
 676     else if (refmminfo->pIOProc == NULL) {
 677         wm->info.fccIOProc = refmminfo->fccIOProc;
 678         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 679         wm->bTmpIOProc = FALSE;
 680     }
 681     /* if IO proc specified, use it and specified four character code */
 682     else {
 683         wm->info.fccIOProc = refmminfo->fccIOProc;
 684         MMIO_InstallIOProc(wm->info.fccIOProc, refmminfo->pIOProc,
 685                            MMIO_INSTALLPROC, is_unicode);
 686         if (!(wm->ioProc = MMIO_FindProcNode(wm->info.fccIOProc))) goto error2;
 687         assert(wm->ioProc->pIOProc == refmminfo->pIOProc);
 688         wm->bTmpIOProc = TRUE;
 689     }
 690
 691     wm->ioProc->count++;
 692     wm->info.dwFlags = dwOpenFlags;
 693
 694     if (dwOpenFlags & MMIO_ALLOCBUF) {
 695         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer,
 696             refmminfo->cchBuffer ? refmminfo->cchBuffer : MMIO_DEFAULTBUFFER, 0);
 697         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 698             goto error1;
 699     } else {
 700         refmminfo->wErrorRet = MMIO_SetBuffer(wm, refmminfo->pchBuffer, refmminfo->cchBuffer, 0);
 701         if (refmminfo->wErrorRet != MMSYSERR_NOERROR)
 702             goto error1;
 703     }
 704
 705     /* see mmioDosIOProc for that one */
 706     memcpy( wm->info.adwInfo, refmminfo->adwInfo, sizeof(wm->info.adwInfo) );
 707
 708     /* call IO proc to actually open file */
 709     refmminfo->wErrorRet = send_message(wm->ioProc, &wm->info, MMIOM_OPEN,
 710                                         (LPARAM)szFileName, 0, FALSE);
 711
 712     /* update offsets and grab file size, when possible */
 713     if (wm->info.fccIOProc == FOURCC_DOS && (send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_CUR, FALSE)) != -1) {
 714        pos = wm->info.lBufOffset = wm->info.lDiskOffset;
 715        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, 0, SEEK_END, FALSE);
 716        wm->dwFileSize = wm->info.lDiskOffset;
 717        send_message(wm->ioProc, &wm->info, MMIOM_SEEK, pos, SEEK_SET, FALSE);
 718     }
 719     else wm->dwFileSize = 0;
 720
 721     if (refmminfo->wErrorRet == 0)
 722         return wm->info.hmmio;
 723  error1:
 724     if (wm->info.dwFlags & MMIO_ALLOCBUF)
 725         HeapFree(GetProcessHeap(), 0, wm->info.pchBuffer);
 726     if (wm->ioProc) wm->ioProc->count--;
 727  error2:
 728     MMIO_Destroy(wm);
 729     return 0;
 730 }
 731
 732 /**************************************************************************
 733  *                              mmioOpenW                       [WINMM.@]
 734  */
 735 HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
 736                        DWORD dwOpenFlags)
 737 {
 738     HMMIO       ret;
 739     LPSTR       szFn = NULL;
 740
 741     if (szFileName)
 742     {
 743         INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
 744         if (len < MAX_PATH) len = MAX_PATH;
 745         szFn = HeapAlloc( GetProcessHeap(), 0, len );
 746         if (!szFn) return NULL;
 747         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
 748     }
 749
 750     ret = MMIO_Open(szFn, lpmmioinfo, dwOpenFlags, TRUE);
 751
 752     HeapFree(GetProcessHeap(), 0, szFn);
 753     return ret;
 754 }
 755
 756 /**************************************************************************
 757  *                              mmioOpenA                       [WINMM.@]
 758  */
 759 HMMIO WINAPI mmioOpenA(LPSTR szFileName, MMIOINFO* lpmmioinfo,
 760                        DWORD dwOpenFlags)
 761 {
 762     return  MMIO_Open(szFileName, lpmmioinfo, dwOpenFlags, FALSE);
 763 }
 764
 765 /**************************************************************************
 766  *                              mmioClose               [WINMM.@]
 767  */
 768 MMRESULT WINAPI mmioClose(HMMIO hmmio, UINT uFlags)
 769 {
 770     LPWINE_MMIO wm;
 771     MMRESULT    result;
 772
 773     TRACE("(%p, %04X);\n", hmmio, uFlags);
 774
 775     if ((wm = MMIO_Get(hmmio)) == NULL)
 776         return MMSYSERR_INVALHANDLE;
 777
 778     if ((result = MMIO_Flush(wm, 0)) != MMSYSERR_NOERROR)
 779         return result;
 780
 781     result = send_message(wm->ioProc, &wm->info, MMIOM_CLOSE, uFlags, 0, FALSE);
 782
 783     MMIO_SetBuffer(wm, NULL, 0, 0);
 784
 785     wm->ioProc->count--;
 786
 787     if (wm->bTmpIOProc)
 788         MMIO_InstallIOProc(wm->info.fccIOProc, wm->ioProc->pIOProc,
 789                            MMIO_REMOVEPROC, wm->ioProc->is_unicode);
 790
 791     MMIO_Destroy(wm);
 792
 793     return result;
 794 }
 795
 796 /**************************************************************************
 797  *                              mmioRead                [WINMM.@]
 798  */
 799 LONG WINAPI mmioRead(HMMIO hmmio, HPSTR pch, LONG cch)
 800 {
 801     LPWINE_MMIO wm;
 802     LONG        count;
 803
 804     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 805
 806     if ((wm = MMIO_Get(hmmio)) == NULL)
 807         return -1;
 808
 809     /* unbuffered case first */
 810     if (!wm->info.pchBuffer)
 811         return send_message(wm->ioProc, &wm->info, MMIOM_READ, (LPARAM)pch, cch, FALSE);
 812
 813     /* first try from current buffer */
 814     if (cch && wm->info.fccIOProc != FOURCC_MEM && wm->info.pchNext == wm->info.pchEndRead)
 815         MMIO_GrabNextBuffer(wm, TRUE);
 816     if (wm->info.pchNext != wm->info.pchEndRead) {
 817         count = wm->info.pchEndRead - wm->info.pchNext;
 818         if (count > cch || count < 0) count = cch;
 819         memcpy(pch, wm->info.pchNext, count);
 820         wm->info.pchNext += count;
 821         pch += count;
 822         cch -= count;
 823     } else
 824         count = 0;
 825
 826     if (cch && (wm->info.fccIOProc != FOURCC_MEM)) {
 827         assert(wm->info.cchBuffer);
 828
 829         while (cch) {
 830             LONG size;
 831
 832             size = MMIO_GrabNextBuffer(wm, TRUE);
 833             if (size <= 0) break;
 834             if (size > cch) size = cch;
 835             memcpy(pch, wm->info.pchBuffer, size);
 836             wm->info.pchNext += size;
 837             pch += size;
 838             cch -= size;
 839             count += size;
 840         }
 841         wm->bBufferLoaded = FALSE;
 842         mmioSeek(hmmio, 0, SEEK_CUR);
 843     }
 844
 845     TRACE("count=%d\n", count);
 846     return count;
 847 }
 848
 849 /**************************************************************************
 850  *                              mmioWrite               [WINMM.@]
 851  */
 852 LONG WINAPI mmioWrite(HMMIO hmmio, HPCSTR pch, LONG cch)
 853 {
 854     LPWINE_MMIO wm;
 855     LONG        count;
 856
 857     TRACE("(%p, %p, %d);\n", hmmio, pch, cch);
 858
 859     if ((wm = MMIO_Get(hmmio)) == NULL)
 860         return -1;
 861
 862     if (wm->info.cchBuffer) {
 863         LONG    bytesW = 0;
 864
 865         while (cch) {
 866             if (wm->info.pchNext != wm->info.pchEndWrite) {
 867                 count = wm->info.pchEndWrite - wm->info.pchNext;
 868                 if (count > cch || count < 0) count = cch;
 869                 memcpy(wm->info.pchNext, pch, count);
 870                 wm->info.pchNext += count;
 871                 pch += count;
 872                 cch -= count;
 873                 bytesW += count;
 874                 wm->info.dwFlags |= MMIO_DIRTY;
 875             } else {
 876                 if (wm->info.fccIOProc == FOURCC_MEM) {
 877                     if (wm->info.adwInfo[0]) {
 878                         /* from where would we get the memory handle? */
 879                         FIXME("memory file expansion not implemented!\n");
 880                         break;
 881                     } else break;
 882                 }
 883             }
 884
 885             if (wm->info.pchNext == wm->info.pchEndWrite)
 886             {
 887                 MMIO_Flush(wm, MMIO_EMPTYBUF);
 888                 MMIO_GrabNextBuffer(wm, FALSE);
 889             }
 890             else break;
 891         }
 892         count = bytesW;
 893     } else {
 894         count = send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)pch, cch, FALSE);
 895         wm->info.lBufOffset = wm->info.lDiskOffset;
 896     }
 897
 898     TRACE("bytes written=%d\n", count);
 899     return count;
 900 }
 901
 902 /**************************************************************************
 903  *                              mmioSeek                [WINMM.@]
 904  */
 905 LONG WINAPI mmioSeek(HMMIO hmmio, LONG lOffset, INT iOrigin)
 906 {
 907     LPWINE_MMIO wm;
 908     LONG        offset;
 909
 910     TRACE("(%p, %08X, %d);\n", hmmio, lOffset, iOrigin);
 911
 912     if ((wm = MMIO_Get(hmmio)) == NULL)
 913         return MMSYSERR_INVALHANDLE;
 914
 915     /* not buffered, direct seek on file */
 916     if (!wm->info.pchBuffer && wm->info.fccIOProc != FOURCC_MEM) {
 917         LRESULT ret = send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, iOrigin, FALSE);
 918         if (ret != -1)
 919             wm->info.lBufOffset = wm->info.lDiskOffset;
 920         return ret;
 921     }
 922
 923     switch (iOrigin) {
 924     case SEEK_SET:
 925         offset = lOffset;
 926         break;
 927     case SEEK_CUR:
 928         offset = wm->info.lBufOffset + (wm->info.pchNext - wm->info.pchBuffer) + lOffset;
 929         break;
 930     case SEEK_END:
 931         switch (wm->info.fccIOProc) {
 932         case FOURCC_MEM:
 933             offset = wm->info.cchBuffer - lOffset;
 934             break;
 935         case FOURCC_DOS:
 936             offset = wm->dwFileSize - lOffset;
 937             break;
 938         default:
 939             offset = send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lOffset, SEEK_END, FALSE);
 940             break;
 941         }
 942         break;
 943     default:
 944         return -1;
 945     }
 946
 947     /* stay in same buffer ? */
 948     /* some memory mapped buffers are defined with -1 as a size */
 949     if ((wm->info.cchBuffer > 0) &&
 950         ((offset < wm->info.lBufOffset) ||
 951          (offset > wm->info.lBufOffset + wm->info.cchBuffer) ||
 952          (offset > wm->dwFileSize && wm->info.fccIOProc == FOURCC_DOS) ||
 953          !wm->bBufferLoaded)) {
 954
 955         /* condition to change buffer */
 956         if ((wm->info.fccIOProc == FOURCC_MEM) ||
 957             MMIO_Flush(wm, 0) != MMSYSERR_NOERROR ||
 958             /* this also sets the wm->info.lDiskOffset field */
 959             send_message(wm->ioProc, &wm->info, MMIOM_SEEK,
 960                          offset, SEEK_SET, FALSE) == -1)
 961             return -1;
 962         wm->info.lBufOffset = offset;
 963         wm->bBufferLoaded = FALSE;
 964         wm->info.pchNext = wm->info.pchEndRead = wm->info.pchBuffer;
 965     }
 966     else
 967         wm->info.pchNext = wm->info.pchBuffer + (offset - wm->info.lBufOffset);
 968
 969     TRACE("=> %d\n", offset);
 970     return offset;
 971 }
 972
 973 /**************************************************************************
 974  *                              mmioGetInfo             [WINMM.@]
 975  */
 976 MMRESULT WINAPI mmioGetInfo(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
 977 {
 978     LPWINE_MMIO         wm;
 979
 980     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 981
 982     if ((wm = MMIO_Get(hmmio)) == NULL)
 983         return MMSYSERR_INVALHANDLE;
 984
 985     *lpmmioinfo = wm->info;
 986
 987     return MMSYSERR_NOERROR;
 988 }
 989
 990 /**************************************************************************
 991  *                              mmioSetInfo             [WINMM.@]
 992  */
 993 MMRESULT WINAPI mmioSetInfo(HMMIO hmmio, const MMIOINFO* lpmmioinfo, UINT uFlags)
 994 {
 995     LPWINE_MMIO wm;
 996
 997     TRACE("(%p,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 998
 999     if ((wm = MMIO_Get(hmmio)) == NULL)
1000         return MMSYSERR_INVALHANDLE;
1001
1002     /* check pointers coherence */
1003     if (lpmmioinfo->pchNext < wm->info.pchBuffer ||
1004             lpmmioinfo->pchNext > wm->info.pchBuffer + wm->info.cchBuffer ||
1005             lpmmioinfo->pchEndRead < wm->info.pchBuffer ||
1006             lpmmioinfo->pchEndRead > wm->info.pchBuffer + wm->info.cchBuffer ||
1007             lpmmioinfo->pchEndWrite < wm->info.pchBuffer ||
1008             lpmmioinfo->pchEndWrite > wm->info.pchBuffer + wm->info.cchBuffer)
1009         return MMSYSERR_INVALPARAM;
1010
1011     wm->info = *lpmmioinfo;
1012     return MMSYSERR_NOERROR;
1013 }
1014
1015 /**************************************************************************
1016 *                               mmioSetBuffer           [WINMM.@]
1017 */
1018 MMRESULT WINAPI mmioSetBuffer(HMMIO hmmio, LPSTR pchBuffer, LONG cchBuffer, UINT uFlags)
1019 {
1020     LPWINE_MMIO         wm;
1021
1022     TRACE("(hmmio=%p, pchBuf=%p, cchBuf=%d, uFlags=%#08x)\n",
1023           hmmio, pchBuffer, cchBuffer, uFlags);
1024
1025     if ((wm = MMIO_Get(hmmio)) == NULL)
1026         return MMSYSERR_INVALHANDLE;
1027
1028     return MMIO_SetBuffer(wm, pchBuffer, cchBuffer, uFlags);
1029 }
1030
1031 /**************************************************************************
1032  *                              mmioFlush               [WINMM.@]
1033  */
1034 MMRESULT WINAPI mmioFlush(HMMIO hmmio, UINT uFlags)
1035 {
1036     LPWINE_MMIO         wm;
1037
1038     TRACE("(%p, %04X)\n", hmmio, uFlags);
1039
1040     if ((wm = MMIO_Get(hmmio)) == NULL)
1041         return MMSYSERR_INVALHANDLE;
1042
1043     return MMIO_Flush(wm, uFlags);
1044 }
1045
1046 /**************************************************************************
1047  *                              mmioAdvance             [WINMM.@]
1048  */
1049 MMRESULT WINAPI mmioAdvance(HMMIO hmmio, MMIOINFO* lpmmioinfo, UINT uFlags)
1050 {
1051     LPWINE_MMIO         wm;
1052
1053     TRACE("hmmio=%p, lpmmioinfo=%p, uFlags=%04X\n", hmmio, lpmmioinfo, uFlags);
1054
1055     /* NOTE: mmioAdvance16 heavily relies on parameters from lpmmioinfo we're using
1056      * here. be sure if you change something here to check mmioAdvance16 as well
1057      */
1058     if ((wm = MMIO_Get(hmmio)) == NULL)
1059         return MMSYSERR_INVALHANDLE;
1060
1061     if (!wm->info.cchBuffer)
1062         return MMIOERR_UNBUFFERED;
1063
1064     if (uFlags != MMIO_READ && uFlags != MMIO_WRITE)
1065         return MMSYSERR_INVALPARAM;
1066
1067     if (MMIO_Flush(wm, 0) != MMSYSERR_NOERROR)
1068         return MMIOERR_CANNOTWRITE;
1069     if (uFlags == MMIO_WRITE && (lpmmioinfo->dwFlags & MMIO_DIRTY))
1070     {
1071         send_message(wm->ioProc, &wm->info, MMIOM_SEEK, lpmmioinfo->lBufOffset, SEEK_SET, FALSE);
1072         send_message(wm->ioProc, &wm->info, MMIOM_WRITE, (LPARAM)lpmmioinfo->pchBuffer,
1073                      lpmmioinfo->pchNext - lpmmioinfo->pchBuffer, FALSE);
1074         lpmmioinfo->dwFlags &= ~MMIO_DIRTY;
1075     }
1076
1077     if (lpmmioinfo && lpmmioinfo->fccIOProc == FOURCC_DOS) {
1078         wm->dwFileSize = max(wm->dwFileSize, lpmmioinfo->lBufOffset +
1079                              (lpmmioinfo->pchNext - lpmmioinfo->pchBuffer));
1080     }
1081     MMIO_GrabNextBuffer(wm, uFlags == MMIO_READ);
1082
1083     if (lpmmioinfo) {
1084         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
1085         lpmmioinfo->pchEndRead  = lpmmioinfo->pchBuffer +
1086             (wm->info.pchEndRead - wm->info.pchBuffer);
1087         lpmmioinfo->pchEndWrite = lpmmioinfo->pchBuffer +
1088             (wm->info.pchEndWrite - wm->info.pchBuffer);
1089         lpmmioinfo->lDiskOffset = wm->info.lDiskOffset;
1090         lpmmioinfo->lBufOffset = wm->info.lBufOffset;
1091     }
1092     return MMSYSERR_NOERROR;
1093 }
1094
1095 /**************************************************************************
1096  *                              mmioStringToFOURCCA     [WINMM.@]
1097  */
1098 FOURCC WINAPI mmioStringToFOURCCA(LPCSTR sz, UINT uFlags)
1099 {
1100     CHAR cc[4];
1101     int i = 0;
1102
1103     for (i = 0; i < 4 && sz[i]; i++) {
1104         if (uFlags & MMIO_TOUPPER) {
1105             cc[i] = RtlUpperChar(sz[i]);
1106         } else {
1107             cc[i] = sz[i];
1108         }
1109     }
1110
1111     /* Pad with spaces */
1112     while (i < 4) cc[i++] = ' ';
1113
1114     TRACE("Got %s\n",debugstr_an(cc,4));
1115     return mmioFOURCC(cc[0],cc[1],cc[2],cc[3]);
1116 }
1117
1118 /**************************************************************************
1119  *                              mmioStringToFOURCCW     [WINMM.@]
1120  */
1121 FOURCC WINAPI mmioStringToFOURCCW(LPCWSTR sz, UINT uFlags)
1122 {
1123     char        szA[4];
1124
1125     WideCharToMultiByte( CP_ACP, 0, sz, 4, szA, sizeof(szA), NULL, NULL );
1126     return mmioStringToFOURCCA(szA,uFlags);
1127 }
1128
1129 /**************************************************************************
1130  *                              mmioInstallIOProcA         [WINMM.@]
1131  */
1132 LPMMIOPROC WINAPI mmioInstallIOProcA(FOURCC fccIOProc,
1133                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1134 {
1135     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, FALSE);
1136 }
1137
1138 /**************************************************************************
1139  *                              mmioInstallIOProcW         [WINMM.@]
1140  */
1141 LPMMIOPROC WINAPI mmioInstallIOProcW(FOURCC fccIOProc,
1142                                      LPMMIOPROC pIOProc, DWORD dwFlags)
1143 {
1144     return MMIO_InstallIOProc(fccIOProc, pIOProc, dwFlags, TRUE);
1145 }
1146
1147 /******************************************************************
1148  *              MMIO_SendMessage
1149  *
1150  *
1151  */
1152 static LRESULT  MMIO_SendMessage(HMMIO hmmio, UINT uMessage, LPARAM lParam1,
1153                                  LPARAM lParam2, BOOL is_unicode)
1154 {
1155     LPWINE_MMIO         wm;
1156
1157     TRACE("(%p, %u, %ld, %ld, %s)\n", hmmio, uMessage, lParam1, lParam2, is_unicode ? "unicode" : "ansi");
1158
1159     if (uMessage < MMIOM_USER)
1160         return MMSYSERR_INVALPARAM;
1161
1162     if ((wm = MMIO_Get(hmmio)) == NULL)
1163         return MMSYSERR_INVALHANDLE;
1164
1165     return send_message(wm->ioProc, &wm->info, uMessage, lParam1, lParam2, is_unicode);
1166 }
1167
1168 /**************************************************************************
1169  *                              mmioSendMessage         [WINMM.@]
1170  */
1171 LRESULT WINAPI mmioSendMessage(HMMIO hmmio, UINT uMessage,
1172                                LPARAM lParam1, LPARAM lParam2)
1173 {
1174     return MMIO_SendMessage(hmmio, uMessage, lParam1, lParam2, FALSE);
1175 }
1176
1177 /**************************************************************************
1178  *                              mmioDescend             [WINMM.@]
1179  */
1180 MMRESULT WINAPI mmioDescend(HMMIO hmmio, LPMMCKINFO lpck,
1181                             const MMCKINFO* lpckParent, UINT uFlags)
1182 {
1183     DWORD               dwOldPos;
1184     FOURCC              srchCkId;
1185     FOURCC              srchType;
1186
1187     TRACE("(%p, %p, %p, %04X);\n", hmmio, lpck, lpckParent, uFlags);
1188
1189     if (lpck == NULL)
1190         return MMSYSERR_INVALPARAM;
1191
1192     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1193     TRACE("dwOldPos=%d\n", dwOldPos);
1194
1195     if (lpckParent != NULL) {
1196         TRACE("seek inside parent at %d !\n", lpckParent->dwDataOffset);
1197         /* EPP: was dwOldPos = mmioSeek(hmmio,lpckParent->dwDataOffset,SEEK_SET); */
1198         if (dwOldPos < lpckParent->dwDataOffset ||
1199             dwOldPos >= lpckParent->dwDataOffset + lpckParent->cksize) {
1200             WARN("outside parent chunk\n");
1201             return MMIOERR_CHUNKNOTFOUND;
1202         }
1203     }
1204
1205     /* The SDK docu says 'ckid' is used for all cases. Real World
1206      * examples disagree -Marcus,990216.
1207      */
1208
1209     srchCkId = 0;
1210     srchType = 0;
1211
1212     /* find_chunk looks for 'ckid' */
1213     if (uFlags & MMIO_FINDCHUNK)
1214         srchCkId = lpck->ckid;
1215
1216     /* find_riff and find_list look for 'fccType' */
1217     if (uFlags & MMIO_FINDLIST)
1218     {
1219         srchCkId = FOURCC_LIST;
1220         srchType = lpck->fccType;
1221     }
1222
1223     if (uFlags & MMIO_FINDRIFF)
1224     {
1225         srchCkId = FOURCC_RIFF;
1226         srchType = lpck->fccType;
1227     }
1228
1229     TRACE("searching for %s.%s\n",
1230           debugstr_an((LPCSTR)&srchCkId, 4), srchType ? debugstr_an((LPCSTR)&srchType, 4) : "<any>");
1231
1232     while (TRUE)
1233     {
1234         LONG ix;
1235
1236         ix = mmioRead(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
1237         if (ix < 2*sizeof(DWORD))
1238         {
1239             mmioSeek(hmmio, dwOldPos, SEEK_SET);
1240             WARN("return ChunkNotFound\n");
1241             return MMIOERR_CHUNKNOTFOUND;
1242         }
1243
1244         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1245         TRACE("ckid=%s fcc=%s cksize=%08X !\n",
1246               debugstr_an((LPCSTR)&lpck->ckid, 4),
1247               srchType ? debugstr_an((LPCSTR)&lpck->fccType, 4) : "<na>",
1248               lpck->cksize);
1249         if ( (!srchCkId || (srchCkId == lpck->ckid)) &&
1250              (!srchType || (srchType == lpck->fccType)) )
1251             break;
1252
1253         dwOldPos = lpck->dwDataOffset + ((lpck->cksize + 1) & ~1);
1254         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1255     }
1256
1257     lpck->dwFlags = 0;
1258     /* If we were looking for RIFF/LIST chunks, the final file position
1259      * is after the chunkid. If we were just looking for the chunk
1260      * it is after the cksize. So add 4 in RIFF/LIST case.
1261      */
1262     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1263         mmioSeek(hmmio, lpck->dwDataOffset + sizeof(DWORD), SEEK_SET);
1264     else
1265     {
1266         mmioSeek(hmmio, lpck->dwDataOffset, SEEK_SET);
1267         lpck->fccType = 0;
1268     }
1269     TRACE("lpck: ckid=%s, cksize=%d, dwDataOffset=%d fccType=%08X (%s)!\n",
1270           debugstr_an((LPSTR)&lpck->ckid, 4), lpck->cksize, lpck->dwDataOffset,
1271           lpck->fccType, srchType ? debugstr_an((LPSTR)&lpck->fccType, 4):"");
1272     return MMSYSERR_NOERROR;
1273 }
1274
1275 /**************************************************************************
1276  *                              mmioAscend              [WINMM.@]
1277  */
1278 MMRESULT WINAPI mmioAscend(HMMIO hmmio, LPMMCKINFO lpck, UINT uFlags)
1279 {
1280     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1281
1282     if (lpck->dwFlags & MMIO_DIRTY) {
1283         DWORD   dwOldPos, dwNewSize;
1284
1285         TRACE("Chunk is dirty, checking if chunk's size is correct\n");
1286         dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1287         TRACE("dwOldPos=%d lpck->dwDataOffset = %d\n", dwOldPos, lpck->dwDataOffset);
1288         dwNewSize = dwOldPos - lpck->dwDataOffset;
1289         if (dwNewSize != lpck->cksize) {
1290             TRACE("Nope: lpck->cksize=%d dwNewSize=%d\n", lpck->cksize, dwNewSize);
1291             lpck->cksize = dwNewSize;
1292
1293             /* pad odd size with 0 */
1294             if (dwNewSize & 1) {
1295                 char ch = 0;
1296                 mmioWrite(hmmio, &ch, 1);
1297             }
1298             mmioSeek(hmmio, lpck->dwDataOffset - sizeof(DWORD), SEEK_SET);
1299             mmioWrite(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1300         }
1301         lpck->dwFlags = 0;
1302     }
1303
1304     mmioSeek(hmmio, lpck->dwDataOffset + ((lpck->cksize + 1) & ~1), SEEK_SET);
1305
1306     return MMSYSERR_NOERROR;
1307 }
1308
1309 /**************************************************************************
1310  *                      mmioCreateChunk                         [WINMM.@]
1311  */
1312 MMRESULT WINAPI mmioCreateChunk(HMMIO hmmio, MMCKINFO* lpck, UINT uFlags)
1313 {
1314     DWORD       dwOldPos;
1315     LONG        size;
1316     LONG        ix;
1317
1318     TRACE("(%p, %p, %04X);\n", hmmio, lpck, uFlags);
1319
1320     dwOldPos = mmioSeek(hmmio, 0, SEEK_CUR);
1321     TRACE("dwOldPos=%d\n", dwOldPos);
1322
1323     if (uFlags == MMIO_CREATELIST)
1324         lpck->ckid = FOURCC_LIST;
1325     else if (uFlags == MMIO_CREATERIFF)
1326         lpck->ckid = FOURCC_RIFF;
1327
1328     TRACE("ckid=%s\n", debugstr_an((LPSTR)&lpck->ckid, 4));
1329
1330     size = 2 * sizeof(DWORD);
1331     lpck->dwDataOffset = dwOldPos + size;
1332
1333     if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1334         size += sizeof(DWORD);
1335     lpck->dwFlags = MMIO_DIRTY;
1336
1337     ix = mmioWrite(hmmio, (LPSTR)lpck, size);
1338     TRACE("after mmioWrite ix = %d req = %d, errno = %d\n", ix, size, errno);
1339     if (ix < size) {
1340         mmioSeek(hmmio, dwOldPos, SEEK_SET);
1341         WARN("return CannotWrite\n");
1342         return MMIOERR_CANNOTWRITE;
1343     }
1344
1345     return MMSYSERR_NOERROR;
1346 }
1347
1348 /**************************************************************************
1349  *                              mmioRenameA                     [WINMM.@]
1350  */
1351 MMRESULT WINAPI mmioRenameA(LPCSTR szFileName, LPCSTR szNewFileName,
1352                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1353 {
1354     struct IOProcList*  ioProc = NULL;
1355     struct IOProcList   tmp;
1356     FOURCC              fcc;
1357
1358     TRACE("(%s, %s, %p, %08X);\n",
1359           debugstr_a(szFileName), debugstr_a(szNewFileName), lpmmioinfo, dwFlags);
1360
1361     /* If both params are NULL, then parse the file name */
1362     if (lpmmioinfo && lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)
1363     {
1364         fcc = MMIO_ParseExtA(szFileName);
1365         if (fcc) ioProc = MMIO_FindProcNode(fcc);
1366     }
1367
1368     /* Handle any unhandled/error case from above. Assume DOS file */
1369     if (!lpmmioinfo || (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL && ioProc == NULL))
1370         ioProc = &defaultProcs[0];
1371     /* if just the four character code is present, look up IO proc */
1372     else if (lpmmioinfo->pIOProc == NULL)
1373         ioProc = MMIO_FindProcNode(lpmmioinfo->fccIOProc);
1374     else /* use relevant ioProc */
1375     {
1376         ioProc = &tmp;
1377         tmp.fourCC = lpmmioinfo->fccIOProc;
1378         tmp.pIOProc = lpmmioinfo->pIOProc;
1379         tmp.is_unicode = FALSE;
1380         tmp.count = 1;
1381     }
1382
1383     /* FIXME: should we actually pass lpmmioinfo down the drain ???
1384      * or make a copy of it because it's const ???
1385      */
1386     return send_message(ioProc, (MMIOINFO*)lpmmioinfo, MMIOM_RENAME,
1387                         (LPARAM)szFileName, (LPARAM)szNewFileName, FALSE);
1388 }
1389
1390 /**************************************************************************
1391  *                              mmioRenameW                     [WINMM.@]
1392  */
1393 MMRESULT WINAPI mmioRenameW(LPCWSTR szFileName, LPCWSTR szNewFileName,
1394                             const MMIOINFO* lpmmioinfo, DWORD dwFlags)
1395 {
1396     LPSTR       szFn = NULL;
1397     LPSTR       sznFn = NULL;
1398     UINT        ret = MMSYSERR_NOMEM;
1399     INT         len;
1400
1401     if (szFileName)
1402     {
1403         len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
1404         szFn = HeapAlloc( GetProcessHeap(), 0, len );
1405         if (!szFn) goto done;
1406         WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
1407     }
1408     if (szNewFileName)
1409     {
1410         len = WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, NULL, 0, NULL, NULL );
1411         sznFn = HeapAlloc( GetProcessHeap(), 0, len );
1412         if (!sznFn) goto done;
1413         WideCharToMultiByte( CP_ACP, 0, szNewFileName, -1, sznFn, len, NULL, NULL );
1414     }
1415
1416     ret = mmioRenameA(szFn, sznFn, lpmmioinfo, dwFlags);
1417
1418 done:
1419     HeapFree(GetProcessHeap(),0,szFn);
1420     HeapFree(GetProcessHeap(),0,sznFn);
1421     return ret;
1422 }