multimedia/mmio.c

   1 /*
   2  * MMIO functions
   3  *
   4  * Copyright 1998 Andrew Taylor
   5  * Copyright 1998 Ove Kåven
   6  *
   7  */
   8
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <errno.h>
  13 #include "windows.h"
  14 #include "win.h"
  15 #include "heap.h"
  16 #include "user.h"
  17 #include "file.h"
  18 #include "mmsystem.h"
  19 #include "debug.h"
  20 #include "xmalloc.h"
  21
  22 /**************************************************************************
  23  *               mmioDosIOProc           [internal]
  24  */
  25 static LRESULT mmioDosIOProc(LPMMIOINFO16 lpmmioinfo, UINT16 uMessage, LPARAM lParam1, LPARAM lParam2) {
  26         TRACE(mmio, "(%p, %X, %ld, %ld);\n", lpmmioinfo, uMessage, lParam1, lParam2);
  27
  28         switch (uMessage) {
  29
  30                 case MMIOM_OPEN: {
  31                         /* Parameters:
  32                          * lParam1 = szFileName parameter from mmioOpen
  33                          * lParam2 = reserved (we use it for 16-bitness)
  34                          * Returns: zero on success, error code on error
  35                          * NOTE: lDiskOffset automatically set to zero
  36                          */
  37
  38                         OFSTRUCT ofs;
  39                         LPSTR szFileName = (LPSTR) lParam1;
  40
  41                         if (lpmmioinfo->dwFlags & MMIO_GETTEMP) {
  42                                 FIXME(mmio, "MMIO_GETTEMP not implemented\n");
  43                                 return MMIOERR_CANNOTOPEN;
  44                         }
  45
  46                         /* if filename NULL, assume open file handle in adwInfo[0] */
  47                         if (!szFileName) {
  48                                 if (lParam2) lpmmioinfo->adwInfo[0] =
  49                                         HFILE16_TO_HFILE32(lpmmioinfo->adwInfo[0]);
  50                                 return 0;
  51                         }
  52
  53                         lpmmioinfo->adwInfo[0] =
  54                                 (DWORD) OpenFile32(szFileName, &ofs, lpmmioinfo->dwFlags);
  55                         if (lpmmioinfo->adwInfo[0] == -1)
  56                                 return MMIOERR_CANNOTOPEN;
  57
  58                         return 0;
  59                 }
  60
  61                 case MMIOM_CLOSE: {
  62                         /* Parameters:
  63                          * lParam1 = wFlags parameter from mmioClose
  64                          * lParam2 = unused
  65                          * Returns: zero on success, error code on error
  66                          */
  67
  68                         UINT16 uFlags = (UINT16) lParam1;
  69
  70                         if (uFlags & MMIO_FHOPEN)
  71                                 return 0;
  72
  73                         _lclose32((HFILE32)lpmmioinfo->adwInfo[0]);
  74                         return 0;
  75
  76                 }
  77
  78                 case MMIOM_READ: {
  79                         /* Parameters:
  80                          * lParam1 = huge pointer to read buffer
  81                          * lParam2 = number of bytes to read
  82                          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
  83                          *         in wErrorRet)
  84                          * NOTE: lDiskOffset should be updated
  85                          */
  86
  87                         HPSTR pch = (HPSTR) lParam1;
  88                         LONG cch = (LONG) lParam2;
  89                         LONG count;
  90
  91                         count = _lread32((HFILE32)lpmmioinfo->adwInfo[0], pch, cch);
  92                         if (count != -1)
  93                                 lpmmioinfo->lDiskOffset += count;
  94
  95                         return count;
  96                 }
  97
  98                 case MMIOM_WRITE:
  99                 case MMIOM_WRITEFLUSH: {
 100                         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 101
 102                         /* Parameters:
 103                          * lParam1 = huge pointer to write buffer
 104                          * lParam2 = number of bytes to write
 105                          * Returns: number of bytes written, -1 for error (error code in
 106                          *              wErrorRet)
 107                          * NOTE: lDiskOffset should be updated
 108                          */
 109
 110                         HPSTR pch = (HPSTR) lParam1;
 111                         LONG cch = (LONG) lParam2;
 112                         LONG count;
 113
 114                         count = _hwrite32((HFILE32)lpmmioinfo->adwInfo[0], pch, cch);
 115                         if (count != -1)
 116                                 lpmmioinfo->lDiskOffset += count;
 117
 118                         return count;
 119                 }
 120
 121                 case MMIOM_SEEK: {
 122             /* Parameters:
 123              * lParam1 = new position
 124              * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 125              * Returns: new file postion, -1 on error
 126              * NOTE: lDiskOffset should be updated
 127              */
 128
 129             LONG Offset = (LONG) lParam1;
 130             LONG Whence = (LONG) lParam2;
 131             LONG pos;
 132
 133             pos = _llseek32((HFILE32)lpmmioinfo->adwInfo[0], Offset, Whence);
 134             if (pos != -1)
 135                 lpmmioinfo->lDiskOffset = pos;
 136
 137             return pos;
 138                 }
 139
 140                 case MMIOM_RENAME: {
 141             /* Parameters:
 142              * lParam1 = old name
 143              * lParam2 = new name
 144              * Returns: zero on success, non-zero on failure
 145              */
 146
 147             FIXME(mmio, "MMIOM_RENAME unimplemented\n");
 148             return MMIOERR_FILENOTFOUND;
 149                 }
 150
 151                 default:
 152                         FIXME(mmio, "unexpected message %u\n", uMessage);
 153                         return 0;
 154         }
 155
 156         return 0;
 157 }
 158
 159 /**************************************************************************
 160 *               mmioMemIOProc           [internal]
 161 */
 162 static LRESULT mmioMemIOProc(LPMMIOINFO16 lpmmioinfo, UINT16 uMessage, LPARAM lParam1, LPARAM lParam2) {
 163         TRACE(mmio,"(%p,0x%04x,0x%08lx,0x%08lx)\n",lpmmioinfo,uMessage,lParam1,lParam2);
 164         switch (uMessage) {
 165
 166                 case MMIOM_OPEN: {
 167                         /* Parameters:
 168                          * lParam1 = filename (must be NULL)
 169                          * lParam2 = reserved (we use it for 16-bitness)
 170                          * Returns: zero on success, error code on error
 171                          * NOTE: lDiskOffset automatically set to zero
 172                          */
 173
 174                         if (!(lpmmioinfo->dwFlags & MMIO_CREATE))
 175                                 lpmmioinfo->pchEndRead = lpmmioinfo->pchEndWrite;
 176
 177                         return 0;
 178                 }
 179
 180                 case MMIOM_CLOSE: {
 181                         /* Parameters:
 182                          * lParam1 = wFlags parameter from mmioClose
 183                          * lParam2 = unused
 184                          * Returns: zero on success, error code on error
 185                          */
 186
 187                         return 0;
 188
 189                 }
 190
 191                 case MMIOM_READ: {
 192                         /* Parameters:
 193                          * lParam1 = huge pointer to read buffer
 194                          * lParam2 = number of bytes to read
 195                          * Returns: number of bytes read, 0 for EOF, -1 for error (error code
 196                          *         in wErrorRet)
 197                          * NOTE: lDiskOffset should be updated
 198                          */
 199
 200                         HPSTR pch = (HPSTR) lParam1;
 201                         LONG cch = (LONG) lParam2;
 202
 203                         FIXME(mmio,"MMIOM_READ on memory files should not occur, buffer may be lost!\n");
 204                         return 0;
 205                 }
 206
 207                 case MMIOM_WRITE:
 208                 case MMIOM_WRITEFLUSH: {
 209                         /* no internal buffering, so WRITEFLUSH handled same as WRITE */
 210
 211                         /* Parameters:
 212                          * lParam1 = huge pointer to write buffer
 213                          * lParam2 = number of bytes to write
 214                          * Returns: number of bytes written, -1 for error (error code in
 215                          *              wErrorRet)
 216                          * NOTE: lDiskOffset should be updated
 217                          */
 218
 219                         HPSTR pch = (HPSTR) lParam1;
 220                         LONG cch = (LONG) lParam2;
 221
 222                         FIXME(mmio,"MMIOM_WRITE on memory files should not occur, buffer may be lost!\n");
 223                         return 0;
 224                 }
 225
 226                 case MMIOM_SEEK: {
 227                         /* Parameters:
 228                          * lParam1 = new position
 229                          * lParam2 = from whence to seek (SEEK_SET, SEEK_CUR, SEEK_END)
 230                          * Returns: new file postion, -1 on error
 231                          * NOTE: lDiskOffset should be updated
 232                          */
 233
 234                         LONG Offset = (LONG) lParam1;
 235                         LONG Whence = (LONG) lParam2;
 236
 237                         FIXME(mmio,"MMIOM_SEEK on memory files should not occur, buffer may be lost!\n");
 238                         return -1;
 239                 }
 240
 241                 default:
 242                         FIXME(mmio, "unexpected message %u\n", uMessage);
 243                         return 0;
 244         }
 245
 246         return 0;
 247 }
 248
 249 /**************************************************************************
 250  *              MMIO_Open               [internal]
 251  */
 252 static HMMIO16 MMIO_Open(LPSTR szFileName, MMIOINFO16 * lpmmioinfo,
 253                         DWORD dwOpenFlags, int use16)
 254 {
 255         LPMMIOINFO16 lpmminfo;
 256         HMMIO16 hmmio;
 257         UINT16 result;
 258
 259         TRACE(mmio, "('%s', %p, %08lX);\n", szFileName, lpmmioinfo, dwOpenFlags);
 260
 261         hmmio = GlobalAlloc16(GHND, sizeof(MMIOINFO16));
 262         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 263         if (lpmminfo == NULL)
 264                 return 0;
 265         memset(lpmminfo, 0, sizeof(MMIOINFO16));
 266
 267         /* assume DOS file if not otherwise specified */
 268         if (!lpmmioinfo ||
 269                 (lpmmioinfo->fccIOProc == 0 && lpmmioinfo->pIOProc == NULL)) {
 270
 271                 lpmminfo->fccIOProc = FOURCC_DOS;
 272                 lpmminfo->pIOProc = (LPMMIOPROC16) mmioDosIOProc;
 273         }
 274         /* if just the four character code is present, look up IO proc */
 275         else if (lpmmioinfo->pIOProc == NULL) {
 276
 277                 lpmminfo->fccIOProc = lpmmioinfo->fccIOProc;
 278                 lpmminfo->pIOProc = mmioInstallIOProc16(lpmmioinfo->fccIOProc, NULL, MMIO_FINDPROC);
 279
 280         }
 281         /* if IO proc specified, use it and specified four character code */
 282         else {
 283
 284                 lpmminfo->fccIOProc = lpmmioinfo->fccIOProc;
 285                 lpmminfo->pIOProc = lpmmioinfo->pIOProc;
 286         }
 287
 288         if (dwOpenFlags & MMIO_ALLOCBUF) {
 289                 if ((result = mmioSetBuffer16(hmmio, NULL, MMIO_DEFAULTBUFFER, 0))) {
 290                         if (lpmmioinfo)
 291                                 lpmmioinfo->wErrorRet = result;
 292                         return 0;
 293                 }
 294         } else
 295         if (lpmminfo->fccIOProc == FOURCC_MEM) {
 296                 if ((result = mmioSetBuffer16(hmmio, lpmmioinfo->pchBuffer, lpmmioinfo->cchBuffer, 0))) {
 297                         if (lpmmioinfo)
 298                                 lpmmioinfo->wErrorRet = result;
 299                         return 0;
 300                 }
 301         }
 302
 303         lpmminfo->dwFlags = dwOpenFlags;
 304         lpmminfo->hmmio = hmmio;
 305
 306         /* call IO proc to actually open file */
 307         result = (UINT16) mmioSendMessage(hmmio, MMIOM_OPEN, (LPARAM) szFileName, (LPARAM) use16);
 308
 309         GlobalUnlock16(hmmio);
 310
 311         if (result != 0) {
 312                 GlobalFree16(hmmio);
 313                 return 0;
 314         }
 315
 316         return hmmio;
 317 }
 318
 319 /**************************************************************************
 320  *                              mmioOpenW                       [WINMM.123]
 321  */
 322 HMMIO32 WINAPI mmioOpen32W(LPWSTR szFileName, MMIOINFO32 * lpmmioinfo,
 323                           DWORD dwOpenFlags)
 324 {
 325         LPSTR   szFn = HEAP_strdupWtoA(GetProcessHeap(),0,szFileName);
 326         HMMIO32 ret = MMIO_Open(szFn,(LPMMIOINFO16)lpmmioinfo,dwOpenFlags,FALSE);
 327
 328         HeapFree(GetProcessHeap(),0,szFn);
 329         return ret;
 330 }
 331
 332 /**************************************************************************
 333  *                              mmioOpenA                       [WINMM.122]
 334  */
 335 HMMIO32 WINAPI mmioOpen32A(LPSTR szFileName, MMIOINFO32 * lpmmioinfo,
 336                           DWORD dwOpenFlags)
 337 {
 338         return MMIO_Open(szFileName,(LPMMIOINFO16)lpmmioinfo,dwOpenFlags,FALSE);
 339 }
 340
 341 /**************************************************************************
 342  *                              mmioOpen                [MMSYSTEM.1210]
 343  */
 344 HMMIO16 WINAPI mmioOpen16(LPSTR szFileName, MMIOINFO16 * lpmmioinfo,
 345                           DWORD dwOpenFlags)
 346 {
 347         return MMIO_Open(szFileName,(LPMMIOINFO16)lpmmioinfo,dwOpenFlags,TRUE);
 348 }
 349
 350
 351 /**************************************************************************
 352  *                              mmioClose               [WINMM.114]
 353  */
 354 MMRESULT32 WINAPI mmioClose32(HMMIO32 hmmio, UINT32 uFlags)
 355 {
 356         LPMMIOINFO16 lpmminfo;
 357         MMRESULT32 result;
 358
 359         TRACE(mmio, "(%04X, %04X);\n", hmmio, uFlags);
 360
 361         lpmminfo = (LPMMIOINFO16) GlobalLock16(hmmio);
 362         if (lpmminfo == NULL)
 363                 return 0;
 364
 365         /* flush the file - if error reported, ignore */
 366         if (mmioFlush32(hmmio, MMIO_EMPTYBUF) != 0)
 367                 lpmminfo->dwFlags &= ~MMIO_DIRTY;
 368
 369         result = mmioSendMessage(hmmio,MMIOM_CLOSE,(LPARAM)uFlags,(LPARAM)0);
 370
 371         mmioSetBuffer16(hmmio, NULL, 0, 0);
 372
 373         GlobalUnlock16(hmmio);
 374         GlobalFree16(hmmio);
 375
 376         return result;
 377 }
 378
 379
 380 /**************************************************************************
 381  *                              mmioClose               [MMSYSTEM.1211]
 382  */
 383 MMRESULT16 WINAPI mmioClose16(HMMIO16 hmmio, UINT16 uFlags)
 384 {
 385         return mmioClose32(hmmio,uFlags);
 386 }
 387
 388
 389
 390 /**************************************************************************
 391  *                              mmioRead                [WINMM.124]
 392  */
 393 LONG WINAPI mmioRead32(HMMIO32 hmmio, HPSTR pch, LONG cch)
 394 {
 395         LONG count;
 396         LPMMIOINFO16 lpmminfo;
 397
 398         TRACE(mmio, "(%04X, %p, %ld);\n", hmmio, pch, cch);
 399
 400         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 401         if (lpmminfo == NULL)
 402                 return -1;
 403
 404         if (lpmminfo->pchNext != lpmminfo->pchEndRead) {
 405                 count = lpmminfo->pchEndRead - lpmminfo->pchNext;
 406                 if (count > cch || count < 0) count = cch;
 407                 memcpy(pch, lpmminfo->pchNext, count);
 408                 lpmminfo->pchNext += count;
 409                 pch += count;
 410                 cch -= count;
 411         } else
 412                 count = 0;
 413
 414         if (cch&&(lpmminfo->fccIOProc!=FOURCC_MEM)) {
 415                 if (lpmminfo->cchBuffer) {
 416                         mmioFlush32(hmmio, MMIO_EMPTYBUF);
 417
 418                         while (cch) {
 419                                 LONG size;
 420                                 lpmminfo->lBufOffset = lpmminfo->lDiskOffset;
 421                                 lpmminfo->pchNext = lpmminfo->pchBuffer;
 422                                 lpmminfo->pchEndRead = lpmminfo->pchBuffer;
 423                                 size = mmioSendMessage(hmmio, MMIOM_READ,
 424                                                 (LPARAM) lpmminfo->pchBuffer,
 425                                                 (LPARAM) lpmminfo->cchBuffer);
 426                                 if (size<=0) break;
 427                                 lpmminfo->pchEndRead = lpmminfo->pchBuffer + size;
 428                                 if (size > cch) size = cch;
 429                                 memcpy(pch, lpmminfo->pchNext, size);
 430                                 lpmminfo->pchNext += size;
 431                                 pch += size;
 432                                 cch -= size;
 433                                 count += size;
 434                         }
 435                 } else {
 436                         count += mmioSendMessage(hmmio, MMIOM_READ, (LPARAM) pch, (LPARAM) cch);
 437                         if (count>0) lpmminfo->lBufOffset += count;
 438                 }
 439         }
 440
 441         GlobalUnlock16(hmmio);
 442         TRACE(mmio, "count=%ld\n", count);
 443         return count;
 444 }
 445
 446 /**************************************************************************
 447  *                              mmioRead                [MMSYSTEM.1212]
 448  */
 449 LONG WINAPI mmioRead16(HMMIO16 hmmio, HPSTR pch, LONG cch)
 450 {
 451         return mmioRead32(hmmio,pch,cch);
 452 }
 453
 454 /**************************************************************************
 455  *                              mmioWrite               [WINMM.133]
 456  */
 457 LONG WINAPI mmioWrite32(HMMIO32 hmmio, HPCSTR pch, LONG cch)
 458 {
 459         LONG count;
 460         LPMMIOINFO16 lpmminfo;
 461
 462         TRACE(mmio, "(%04X, %p, %ld);\n", hmmio, pch, cch);
 463
 464         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 465         if (lpmminfo == NULL)
 466                 return -1;
 467
 468         if (lpmminfo->cchBuffer) {
 469                 count = 0;
 470                 while (cch) {
 471                         if (lpmminfo->pchNext != lpmminfo->pchEndWrite) {
 472                                 count = lpmminfo->pchEndWrite - lpmminfo->pchNext;
 473                                 if (count > cch || count < 0) count = cch;
 474                                 memcpy(lpmminfo->pchNext, pch, count);
 475                                 lpmminfo->pchNext += count;
 476                                 pch += count;
 477                                 cch -= count;
 478                                 lpmminfo->dwFlags |= MMIO_DIRTY;
 479                         } else
 480                         if (lpmminfo->fccIOProc==FOURCC_MEM) {
 481                                 if (lpmminfo->adwInfo[0]) {
 482                                         /* from where would we get the memory handle? */
 483                                         FIXME(mmio, "memory file expansion not implemented!\n");
 484                                 } else break;
 485                         }
 486
 487                         if (lpmminfo->pchNext == lpmminfo->pchEndWrite
 488                                 && mmioFlush32(hmmio, MMIO_EMPTYBUF)) break;
 489                 }
 490         } else {
 491                 count = mmioSendMessage(hmmio, MMIOM_WRITE, (LPARAM) pch, (LPARAM) cch);
 492                 lpmminfo->lBufOffset = lpmminfo->lDiskOffset;
 493         }
 494
 495         GlobalUnlock16(hmmio);
 496         TRACE(mmio, "count=%ld\n", count);
 497         return count;
 498 }
 499
 500 /**************************************************************************
 501  *                              mmioWrite               [MMSYSTEM.1213]
 502  */
 503 LONG WINAPI mmioWrite16(HMMIO16 hmmio, HPCSTR pch, LONG cch)
 504 {
 505         return mmioWrite32(hmmio,pch,cch);
 506 }
 507
 508 /**************************************************************************
 509  *                              mmioSeek                [MMSYSTEM.1214]
 510  */
 511 LONG WINAPI mmioSeek32(HMMIO32 hmmio, LONG lOffset, INT32 iOrigin)
 512 {
 513         int offset;
 514         LPMMIOINFO16 lpmminfo;
 515
 516         TRACE(mmio, "(%04X, %08lX, %d);\n", hmmio, lOffset, iOrigin);
 517
 518         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 519         if (lpmminfo == NULL)
 520                 return -1;
 521
 522         offset = (iOrigin==SEEK_SET)?(lOffset - lpmminfo->lBufOffset):
 523                  (iOrigin==SEEK_CUR)?(lOffset +
 524                  (lpmminfo->pchNext - lpmminfo->pchBuffer)):-1;
 525
 526         if ((lpmminfo->cchBuffer<0)||
 527             ((offset>=0)&&(offset<=(lpmminfo->pchEndRead-lpmminfo->pchBuffer)))) {
 528                 lpmminfo->pchNext = lpmminfo->pchBuffer + offset;
 529                 GlobalUnlock16(hmmio);
 530                 return lpmminfo->lBufOffset + offset;
 531         }
 532
 533         if ((lpmminfo->fccIOProc==FOURCC_MEM)||mmioFlush32(hmmio, MMIO_EMPTYBUF)) {
 534                 GlobalUnlock16(hmmio);
 535                 return -1;
 536         }
 537
 538         offset = mmioSendMessage(hmmio, MMIOM_SEEK, (LPARAM) lOffset, (LPARAM) iOrigin);
 539         lpmminfo->lBufOffset = lpmminfo->lDiskOffset;
 540
 541         GlobalUnlock16(hmmio);
 542         return offset;
 543 }
 544
 545 /**************************************************************************
 546  *                              mmioSeek                [MMSYSTEM.1214]
 547  */
 548 LONG WINAPI mmioSeek16(HMMIO16 hmmio, LONG lOffset, INT16 iOrigin)
 549 {
 550         return mmioSeek32(hmmio,lOffset,iOrigin);
 551 }
 552
 553 /**************************************************************************
 554  *                              mmioGetInfo             [MMSYSTEM.1215]
 555  */
 556 UINT16 WINAPI mmioGetInfo16(HMMIO16 hmmio, MMIOINFO16 * lpmmioinfo, UINT16 uFlags)
 557 {
 558         LPMMIOINFO16    lpmminfo;
 559         TRACE(mmio, "mmioGetInfo\n");
 560         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 561         if (lpmminfo == NULL) return 0;
 562         memcpy(lpmmioinfo, lpmminfo, sizeof(MMIOINFO16));
 563         GlobalUnlock16(hmmio);
 564         return 0;
 565 }
 566
 567 /**************************************************************************
 568  *                              mmioGetInfo             [WINMM.118]
 569  */
 570 UINT32 WINAPI mmioGetInfo32(HMMIO32 hmmio, MMIOINFO32*lpmmioinfo, UINT32 uFlags)
 571 {
 572         MMIOINFO16      mmioinfo;
 573         LPMMIOINFO16    lpmminfo=&mmioinfo;
 574         UINT16          ret;
 575
 576         TRACE(mmio, "(0x%04x,%p,0x%08x)\n",hmmio,lpmmioinfo,uFlags);
 577         ret = mmioGetInfo16(hmmio,&mmioinfo,uFlags);
 578         if (!ret)
 579                 return 0;
 580         lpmmioinfo->dwFlags     = lpmminfo->dwFlags;
 581         lpmmioinfo->fccIOProc   = lpmminfo->fccIOProc;
 582         lpmmioinfo->pIOProc     = (LPMMIOPROC32)lpmminfo->pIOProc;
 583         lpmmioinfo->wErrorRet   = lpmminfo->wErrorRet;
 584         lpmmioinfo->htask       = lpmminfo->htask;
 585         lpmmioinfo->cchBuffer   = lpmminfo->cchBuffer;
 586         lpmmioinfo->pchBuffer   = lpmminfo->pchBuffer;
 587         lpmmioinfo->pchNext     = lpmminfo->pchNext;
 588         lpmmioinfo->pchEndRead  = lpmminfo->pchEndRead;
 589         lpmmioinfo->pchEndWrite = lpmminfo->pchEndWrite;
 590         lpmmioinfo->lBufOffset  = lpmminfo->lBufOffset;
 591         lpmmioinfo->lDiskOffset = lpmminfo->lDiskOffset;
 592         memcpy(lpmmioinfo->adwInfo,lpmminfo->adwInfo,sizeof(lpmminfo->adwInfo));
 593         lpmmioinfo->dwReserved1 = lpmminfo->dwReserved1;
 594         lpmmioinfo->dwReserved2 = lpmminfo->dwReserved2;
 595         lpmmioinfo->hmmio       = lpmminfo->hmmio;
 596         return 0;
 597 }
 598
 599 /**************************************************************************
 600  *                              mmioSetInfo             [MMSYSTEM.1216]
 601  */
 602 UINT16 WINAPI mmioSetInfo16(HMMIO16 hmmio, const MMIOINFO16 * lpmmioinfo, UINT16 uFlags)
 603 {
 604         LPMMIOINFO16    lpmminfo;
 605         TRACE(mmio, "mmioSetInfo\n");
 606         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 607         if (lpmminfo == NULL) return 0;
 608         lpmminfo->pchNext       = lpmmioinfo->pchNext;
 609         lpmminfo->pchEndRead    = lpmmioinfo->pchEndRead;
 610         GlobalUnlock16(hmmio);
 611         return 0;
 612 }
 613
 614 /**************************************************************************
 615  *                              mmioSetInfo             [WINMM.130]
 616  */
 617 UINT32 WINAPI mmioSetInfo32(HMMIO32 hmmio, const MMIOINFO32 * lpmmioinfo, UINT32 uFlags)
 618 {
 619         LPMMIOINFO16    lpmminfo;
 620         TRACE(mmio, "mmioSetInfo\n");
 621         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 622         if (lpmminfo == NULL) return 0;
 623         lpmminfo->pchNext       = lpmmioinfo->pchNext;
 624         lpmminfo->pchEndRead    = lpmmioinfo->pchEndRead;
 625         GlobalUnlock16(hmmio);
 626         return 0;
 627 }
 628
 629 /**************************************************************************
 630 *                               mmioSetBuffer           [WINMM.129]
 631 */
 632 UINT32 WINAPI mmioSetBuffer32(HMMIO32 hmmio, LPSTR pchBuffer,
 633                                                                                 LONG cchBuffer, UINT32 uFlags)
 634 {
 635         LPMMIOINFO16    lpmminfo;
 636
 637         if (mmioFlush32(hmmio, MMIO_EMPTYBUF) != 0)
 638                 return MMIOERR_CANNOTWRITE;
 639
 640         TRACE(mmio, "(hmmio=%04x, pchBuf=%p, cchBuf=%ld, uFlags=%#08x)\n",
 641               hmmio, pchBuffer, cchBuffer, uFlags);
 642
 643         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 644         if (lpmminfo == NULL) return 0;
 645         if ((!cchBuffer || pchBuffer) && lpmminfo->dwFlags&MMIO_ALLOCBUF) {
 646                 GlobalUnlock16(lpmminfo->dwReserved1);
 647                 GlobalFree16(lpmminfo->dwReserved1);
 648                 lpmminfo->dwFlags &= ~MMIO_ALLOCBUF;
 649         }
 650         if (pchBuffer) {
 651                 lpmminfo->pchBuffer = pchBuffer;
 652         } else if (lpmminfo->dwFlags&MMIO_ALLOCBUF) {
 653                 HGLOBAL16 hNewBuf;
 654                 GlobalUnlock16(lpmminfo->dwReserved1);
 655                 hNewBuf = GlobalReAlloc16(lpmminfo->dwReserved1, cchBuffer, 0);
 656                 if (!hNewBuf) {
 657                         /* FIXME: this assumes the memory block didn't move */
 658                         GlobalLock16(lpmminfo->dwReserved1);
 659                         GlobalUnlock16(hmmio);
 660                         return MMIOERR_OUTOFMEMORY;
 661                 }
 662                 lpmminfo->dwReserved1 = hNewBuf;
 663                 lpmminfo->pchBuffer = GlobalLock16(hNewBuf);
 664         } else if (cchBuffer) {
 665                 HGLOBAL16 hNewBuf = GlobalAlloc16(GMEM_MOVEABLE, cchBuffer);
 666                 if (!hNewBuf) {
 667                         GlobalUnlock16(hmmio);
 668                         return MMIOERR_OUTOFMEMORY;
 669                 }
 670                 lpmminfo->dwReserved1 = hNewBuf;
 671                 lpmminfo->pchBuffer = GlobalLock16(hNewBuf);
 672                 lpmminfo->dwFlags |= MMIO_ALLOCBUF;
 673         } else
 674                 lpmminfo->pchBuffer = NULL;
 675         lpmminfo->cchBuffer = cchBuffer;
 676         lpmminfo->pchNext = lpmminfo->pchBuffer;
 677         lpmminfo->pchEndRead = lpmminfo->pchBuffer;
 678         lpmminfo->pchEndWrite = lpmminfo->pchBuffer + cchBuffer;
 679         lpmminfo->lBufOffset = 0;
 680
 681         GlobalUnlock16(hmmio);
 682         return (UINT16) 0;
 683 }
 684
 685 /**************************************************************************
 686 *                               mmioSetBuffer           [MMSYSTEM.1217]
 687 */
 688 UINT16 WINAPI mmioSetBuffer16(HMMIO16 hmmio, LPSTR pchBuffer,
 689                                                                                 LONG cchBuffer, UINT16 uFlags)
 690 {
 691         return mmioSetBuffer32(hmmio, pchBuffer, cchBuffer, uFlags);
 692 }
 693
 694 /**************************************************************************
 695  *                              mmioFlush               [WINMM.117]
 696  */
 697 UINT32 WINAPI mmioFlush32(HMMIO32 hmmio, UINT32 uFlags)
 698 {
 699         LPMMIOINFO16    lpmminfo;
 700         TRACE(mmio, "(%04X, %04X)\n", hmmio, uFlags);
 701         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 702         if (lpmminfo == NULL) return 0;
 703
 704         if ((!lpmminfo->cchBuffer)||(lpmminfo->fccIOProc==FOURCC_MEM)) {
 705                 GlobalUnlock16(hmmio);
 706                 return 0;
 707         }
 708         /* not quite sure what to do here, but I'll guess */
 709         if (lpmminfo->dwFlags & MMIO_DIRTY) {
 710                 mmioSendMessage(hmmio, MMIOM_SEEK,
 711                         (LPARAM) lpmminfo->lBufOffset,
 712                         (LPARAM) SEEK_SET);
 713                 mmioSendMessage(hmmio, MMIOM_WRITE,
 714                         (LPARAM) lpmminfo->pchBuffer,
 715                         (LPARAM) (lpmminfo->pchNext - lpmminfo->pchBuffer) );
 716                 lpmminfo->dwFlags &= ~MMIO_DIRTY;
 717         }
 718         if (uFlags & MMIO_EMPTYBUF) {
 719                 /* seems Windows doesn't do any seeking here, hopefully this
 720                    won't matter, otherwise a slight rewrite is necessary */
 721                 mmioSendMessage(hmmio, MMIOM_SEEK,
 722                         (LPARAM) (lpmminfo->lBufOffset +
 723                                   (lpmminfo->pchNext - lpmminfo->pchBuffer)),
 724                         (LPARAM) SEEK_SET);
 725                 lpmminfo->pchNext = lpmminfo->pchBuffer;
 726                 lpmminfo->pchEndRead = lpmminfo->pchBuffer;
 727                 lpmminfo->lBufOffset = lpmminfo->lDiskOffset;
 728         }
 729
 730         GlobalUnlock16(hmmio);
 731         return 0;
 732 }
 733
 734 /**************************************************************************
 735  *                              mmioFlush               [MMSYSTEM.1218]
 736  */
 737 UINT16 WINAPI mmioFlush16(HMMIO16 hmmio, UINT16 uFlags)
 738 {
 739         return mmioFlush32(hmmio,uFlags);
 740 }
 741
 742 /**************************************************************************
 743  *                              mmioAdvance             [MMSYSTEM.1219]
 744  */
 745 UINT32 WINAPI mmioAdvance32(HMMIO32 hmmio,MMIOINFO32*lpmmioinfo,UINT32 uFlags)
 746 {
 747         LPMMIOINFO16    lpmminfo;
 748         TRACE(mmio, "mmioAdvance\n");
 749         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 750         if (lpmminfo == NULL) return 0;
 751         if (!lpmminfo->cchBuffer) {
 752                 GlobalUnlock16(hmmio);
 753                 return MMIOERR_UNBUFFERED;
 754         }
 755         lpmminfo->pchNext = lpmmioinfo->pchNext;
 756         if (mmioFlush32(hmmio, MMIO_EMPTYBUF)) {
 757                 GlobalUnlock16(hmmio);
 758                 return MMIOERR_CANNOTWRITE;
 759         }
 760         if (uFlags == MMIO_READ)
 761                 lpmmioinfo->pchEndRead = lpmmioinfo->pchBuffer +
 762                     mmioSendMessage(hmmio, MMIOM_READ,
 763                         (LPARAM) lpmmioinfo->pchBuffer,
 764                         (LPARAM) lpmmioinfo->cchBuffer);
 765 #if 0   /* mmioFlush32 already did the writing */
 766         if (uFlags == MMIO_WRITE)
 767                     mmioSendMessage(hmmio, MMIOM_WRITE,
 768                         (LPARAM) lpmmioinfo->pchBuffer,
 769                         (LPARAM) lpmmioinfo->cchBuffer);
 770 #endif
 771         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
 772         GlobalUnlock16(hmmio);
 773         return 0;
 774 }
 775
 776 /**************************************************************************
 777  *                              mmioAdvance             [MMSYSTEM.1219]
 778  */
 779 UINT16 WINAPI mmioAdvance16(HMMIO16 hmmio,MMIOINFO16*lpmmioinfo,UINT16 uFlags)
 780 {
 781         LPMMIOINFO16    lpmminfo;
 782         TRACE(mmio, "mmioAdvance\n");
 783         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 784         if (lpmminfo == NULL) return 0;
 785         if (!lpmminfo->cchBuffer) {
 786                 GlobalUnlock16(hmmio);
 787                 return MMIOERR_UNBUFFERED;
 788         }
 789         lpmminfo->pchNext = lpmmioinfo->pchNext;
 790         if (mmioFlush32(hmmio, MMIO_EMPTYBUF)) {
 791                 GlobalUnlock16(hmmio);
 792                 return MMIOERR_CANNOTWRITE;
 793         }
 794         if (uFlags == MMIO_READ)
 795                 lpmmioinfo->pchEndRead = lpmmioinfo->pchBuffer +
 796                     mmioSendMessage(hmmio, MMIOM_READ,
 797                         (LPARAM) lpmmioinfo->pchBuffer,
 798                         (LPARAM) lpmmioinfo->cchBuffer);
 799 #if 0   /* mmioFlush32 already did the writing */
 800         if (uFlags == MMIO_WRITE)
 801                     mmioSendMessage(hmmio, MMIOM_WRITE,
 802                         (LPARAM) lpmmioinfo->pchBuffer,
 803                         (LPARAM) lpmmioinfo->cchBuffer);
 804 #endif
 805         lpmmioinfo->pchNext = lpmmioinfo->pchBuffer;
 806         GlobalUnlock16(hmmio);
 807         return 0;
 808 }
 809
 810 /**************************************************************************
 811  *                              mmioStringToFOURCCA     [WINMM.131]
 812  */
 813 FOURCC WINAPI mmioStringToFOURCC32A(LPCSTR sz, UINT32 uFlags)
 814 {
 815         return mmioStringToFOURCC16(sz,uFlags);
 816 }
 817
 818 /**************************************************************************
 819  *                              mmioStringToFOURCCW     [WINMM.132]
 820  */
 821 FOURCC WINAPI mmioStringToFOURCC32W(LPCWSTR sz, UINT32 uFlags)
 822 {
 823         LPSTR   szA = HEAP_strdupWtoA(GetProcessHeap(),0,sz);
 824         FOURCC  ret = mmioStringToFOURCC32A(szA,uFlags);
 825
 826         HeapFree(GetProcessHeap(),0,szA);
 827         return ret;
 828 }
 829
 830 /**************************************************************************
 831  *                              mmioStringToFOURCC      [MMSYSTEM.1220]
 832  */
 833 FOURCC WINAPI mmioStringToFOURCC16(LPCSTR sz, UINT16 uFlags)
 834 {
 835         return mmioFOURCC(sz[0],sz[1],sz[2],sz[3]);
 836 }
 837
 838 /**************************************************************************
 839 *                               mmioInstallIOProc16     [MMSYSTEM.1221]
 840 */
 841 LPMMIOPROC16 WINAPI mmioInstallIOProc16(FOURCC fccIOProc,
 842                                         LPMMIOPROC16 pIOProc, DWORD dwFlags)
 843 {
 844         TRACE(mmio, "(%ld, %p, %08lX)\n",
 845                                  fccIOProc, pIOProc, dwFlags);
 846
 847         if (dwFlags & MMIO_GLOBALPROC) {
 848                 FIXME(mmio, " global procedures not implemented\n");
 849         }
 850
 851         /* just handle the known procedures for now */
 852         switch(dwFlags & (MMIO_INSTALLPROC|MMIO_REMOVEPROC|MMIO_FINDPROC)) {
 853                 case MMIO_INSTALLPROC:
 854                         return NULL;
 855                 case MMIO_REMOVEPROC:
 856                         return NULL;
 857                 case MMIO_FINDPROC:
 858                         if (fccIOProc == FOURCC_DOS)
 859                                 return (LPMMIOPROC16) mmioDosIOProc;
 860                         else if (fccIOProc == FOURCC_MEM)
 861                                 return (LPMMIOPROC16) mmioMemIOProc;
 862                         else
 863                                 return NULL;
 864                 default:
 865                         return NULL;
 866         }
 867 }
 868
 869 /**************************************************************************
 870  *                              mmioInstallIOProc32A   [WINMM.120]
 871  */
 872 LPMMIOPROC32 WINAPI mmioInstallIOProc32A(FOURCC fccIOProc,
 873                                          LPMMIOPROC32 pIOProc, DWORD dwFlags)
 874 {
 875         FIXME(mmio, "(%c%c%c%c,%p,0x%08lx) -- empty stub \n",
 876                      (char)((fccIOProc&0xff000000)>>24),
 877                      (char)((fccIOProc&0x00ff0000)>>16),
 878                      (char)((fccIOProc&0x0000ff00)>> 8),
 879                      (char)(fccIOProc&0x000000ff),
 880                      pIOProc, dwFlags );
 881         return 0;
 882 }
 883
 884 /**************************************************************************
 885 *                               mmioSendMessage         [MMSYSTEM.1222]
 886 */
 887 LRESULT WINAPI mmioSendMessage(HMMIO16 hmmio, UINT16 uMessage,
 888                                LPARAM lParam1, LPARAM lParam2)
 889 {
 890         LPMMIOINFO16 lpmminfo;
 891         LRESULT result;
 892         const char *msg = NULL;
 893
 894 #ifdef DEBUG_RUNTIME
 895         switch (uMessage) {
 896 #define msgname(x) case x: msg = #x; break;
 897                 msgname(MMIOM_OPEN);
 898                 msgname(MMIOM_CLOSE);
 899                 msgname(MMIOM_READ);
 900                 msgname(MMIOM_WRITE);
 901                 msgname(MMIOM_WRITEFLUSH);
 902                 msgname(MMIOM_SEEK);
 903                 msgname(MMIOM_RENAME);
 904 #undef msgname
 905         }
 906 #endif
 907
 908         if (msg)
 909                 TRACE(mmio, "(%04X, %s, %ld, %ld)\n",
 910                                          hmmio, msg, lParam1, lParam2);
 911         else
 912                 TRACE(mmio, "(%04X, %u, %ld, %ld)\n",
 913                                          hmmio, uMessage, lParam1, lParam2);
 914
 915         lpmminfo = (LPMMIOINFO16)GlobalLock16(hmmio);
 916
 917         if (lpmminfo && lpmminfo->pIOProc)
 918                 result = (*lpmminfo->pIOProc)((LPSTR)lpmminfo, uMessage, lParam1, lParam2);
 919         else
 920                 result = MMSYSERR_INVALPARAM;
 921
 922         GlobalUnlock16(hmmio);
 923
 924         return result;
 925 }
 926
 927 /**************************************************************************
 928 *                               mmioDescend             [MMSYSTEM.1223]
 929 */
 930 UINT16 WINAPI mmioDescend(HMMIO16 hmmio, MMCKINFO * lpck,
 931                           const MMCKINFO * lpckParent, UINT16 uFlags)
 932 {
 933         DWORD   dwfcc, dwOldPos;
 934
 935         TRACE(mmio, "(%04X, %p, %p, %04X);\n",
 936                                 hmmio, lpck, lpckParent, uFlags);
 937
 938         if (lpck == NULL)
 939             return 0;
 940
 941         dwfcc = lpck->ckid;
 942         TRACE(mmio, "dwfcc=%08lX\n", dwfcc);
 943
 944         dwOldPos = mmioSeek32(hmmio, 0, SEEK_CUR);
 945         TRACE(mmio, "dwOldPos=%ld\n", dwOldPos);
 946
 947         if (lpckParent != NULL) {
 948                 TRACE(mmio, "seek inside parent at %ld !\n", lpckParent->dwDataOffset);
 949                 dwOldPos = mmioSeek32(hmmio,lpckParent->dwDataOffset,SEEK_SET);
 950         }
 951 /*
 952
 953    It seems to be that FINDRIFF should not be treated the same as the
 954    other FINDxxx so I treat it as a MMIO_FINDxxx
 955
 956         if ((uFlags & MMIO_FINDCHUNK) || (uFlags & MMIO_FINDRIFF) ||
 957                 (uFlags & MMIO_FINDLIST)) {
 958 */
 959         if ((uFlags & MMIO_FINDCHUNK) || (uFlags & MMIO_FINDLIST)) {
 960                 TRACE(mmio, "MMIO_FINDxxxx dwfcc=%08lX !\n", dwfcc);
 961                 while (TRUE) {
 962                         LONG ix;
 963
 964                         ix = mmioRead32(hmmio, (LPSTR)lpck, 3 * sizeof(DWORD));
 965                         TRACE(mmio, "after _lread32 ix = %ld req = %d, errno = %d\n",ix,3 * sizeof(DWORD),errno);
 966                         if (ix < sizeof(DWORD)) {
 967                                 mmioSeek32(hmmio, dwOldPos, SEEK_SET);
 968                                 WARN(mmio, "return ChunkNotFound\n");
 969                                 return MMIOERR_CHUNKNOTFOUND;
 970                         }
 971                         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
 972                         if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
 973                                 lpck->dwDataOffset += sizeof(DWORD);
 974                         if (ix < lpck->dwDataOffset - dwOldPos) {
 975                                 mmioSeek32(hmmio, dwOldPos, SEEK_SET);
 976                                 WARN(mmio, "return ChunkNotFound\n");
 977                                 return MMIOERR_CHUNKNOTFOUND;
 978                         }
 979                         TRACE(mmio, "dwfcc=%08lX ckid=%08lX cksize=%08lX !\n",
 980                                                                         dwfcc, lpck->ckid, lpck->cksize);
 981                         if (dwfcc == lpck->ckid)
 982                                 break;
 983
 984                         dwOldPos = lpck->dwDataOffset + lpck->cksize;
 985                         mmioSeek32(hmmio, dwOldPos, SEEK_SET);
 986                 }
 987         }
 988         else {
 989                 if (mmioRead32(hmmio, (LPSTR)lpck, sizeof(MMCKINFO)) < sizeof(MMCKINFO)) {
 990                         mmioSeek32(hmmio, dwOldPos, SEEK_SET);
 991                         WARN(mmio, "return ChunkNotFound 2nd\n");
 992                         return MMIOERR_CHUNKNOTFOUND;
 993                 }
 994                 lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
 995                 if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
 996                         lpck->dwDataOffset += sizeof(DWORD);
 997         }
 998         mmioSeek32(hmmio, lpck->dwDataOffset, SEEK_SET);
 999
1000         TRACE(mmio, "lpck->ckid=%08lX lpck->cksize=%ld !\n",
1001                                                                 lpck->ckid, lpck->cksize);
1002         TRACE(mmio, "lpck->fccType=%08lX !\n", lpck->fccType);
1003
1004         return 0;
1005 }
1006
1007 /**************************************************************************
1008  *                              mmioAscend              [WINMM.113]
1009  */
1010 UINT32 WINAPI mmioAscend32(HMMIO32 hmmio, MMCKINFO * lpck, UINT32 uFlags)
1011 {
1012         TRACE(mmio, "(%04X, %p, %04X);\n",
1013                                 hmmio, lpck, uFlags);
1014         if (lpck->dwFlags&MMIO_DIRTY) {
1015                 DWORD   dwOldPos, dwNewSize, dwSizePos;
1016
1017                 TRACE(mmio, "chunk is marked MMIO_DIRTY, correcting chunk size\n");
1018                 dwOldPos = mmioSeek32(hmmio, 0, SEEK_CUR);
1019                 TRACE(mmio, "dwOldPos=%ld\n", dwOldPos);
1020                 dwNewSize = dwOldPos - lpck->dwDataOffset;
1021                 if (dwNewSize != lpck->cksize) {
1022                         TRACE(mmio, "dwNewSize=%ld\n", dwNewSize);
1023                         lpck->cksize = dwNewSize;
1024
1025                         dwSizePos = lpck->dwDataOffset - sizeof(DWORD);
1026                         if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1027                                 dwSizePos -= sizeof(DWORD);
1028                         TRACE(mmio, "dwSizePos=%ld\n", dwSizePos);
1029
1030                         mmioSeek32(hmmio, dwSizePos, SEEK_SET);
1031                         mmioWrite32(hmmio, (LPSTR)&dwNewSize, sizeof(DWORD));
1032                 }
1033         }
1034         mmioSeek32(hmmio,lpck->dwDataOffset+lpck->cksize,SEEK_SET);
1035
1036         return 0;
1037 }
1038
1039 /**************************************************************************
1040  *                              mmioAscend              [MMSYSTEM.1224]
1041  */
1042 UINT16 WINAPI mmioAscend16(HMMIO16 hmmio, MMCKINFO * lpck, UINT16 uFlags)
1043 {
1044         return mmioAscend32(hmmio,lpck,uFlags);
1045 }
1046
1047 /**************************************************************************
1048  *                              mmioCreateChunk         [MMSYSTEM.1225]
1049  */
1050 UINT16 WINAPI mmioCreateChunk(HMMIO16 hmmio, MMCKINFO * lpck, UINT16 uFlags)
1051 {
1052         DWORD   dwOldPos;
1053         LONG ix;
1054
1055         TRACE(mmio, "(%04X, %p, %04X);\n",
1056                                 hmmio, lpck, uFlags);
1057
1058         dwOldPos = mmioSeek32(hmmio, 0, SEEK_CUR);
1059         TRACE(mmio, "dwOldPos=%ld\n", dwOldPos);
1060
1061         if (uFlags == MMIO_CREATELIST)
1062                 lpck->ckid = FOURCC_LIST;
1063         else if (uFlags == MMIO_CREATERIFF)
1064                 lpck->ckid = FOURCC_RIFF;
1065
1066         TRACE(mmio, "ckid=%08lX\n", lpck->ckid);
1067
1068         lpck->dwDataOffset = dwOldPos + 2 * sizeof(DWORD);
1069         if (lpck->ckid == FOURCC_RIFF || lpck->ckid == FOURCC_LIST)
1070                 lpck->dwDataOffset += sizeof(DWORD);
1071         lpck->dwFlags = MMIO_DIRTY;
1072
1073         ix = mmioWrite32(hmmio, (LPSTR)lpck, lpck->dwDataOffset - dwOldPos);
1074         TRACE(mmio, "after _lwrite32 ix = %ld req = %ld, errno = %d\n",ix,lpck->dwDataOffset - dwOldPos,errno);
1075         if (ix < lpck->dwDataOffset - dwOldPos) {
1076
1077                 mmioSeek32(hmmio, dwOldPos, SEEK_SET);
1078                 WARN(mmio, "return CannotWrite\n");
1079                 return MMIOERR_CANNOTWRITE;
1080         }
1081
1082         return 0;
1083 }
1084
1085
1086 /**************************************************************************
1087  *                              mmioRename              [MMSYSTEM.1226]
1088  */
1089 UINT16 WINAPI mmioRename(LPCSTR szFileName, LPCSTR szNewFileName,
1090                          MMIOINFO16 * lpmmioinfo, DWORD dwRenameFlags)
1091 {
1092         UINT16 result;
1093         LPMMIOINFO16 lpmminfo;
1094         HMMIO16 hmmio;
1095
1096         TRACE(mmio, "('%s', '%s', %p, %08lX);\n",
1097                                  szFileName, szNewFileName, lpmmioinfo, dwRenameFlags);
1098
1099         hmmio = GlobalAlloc16(GHND, sizeof(MMIOINFO16));
1100         lpmminfo = (LPMMIOINFO16) GlobalLock16(hmmio);
1101
1102         if (lpmmioinfo)
1103                 memcpy(lpmminfo, lpmmioinfo, sizeof(MMIOINFO16));
1104
1105         /* assume DOS file if not otherwise specified */
1106         if (lpmminfo->fccIOProc == 0 && lpmminfo->pIOProc == NULL) {
1107
1108                 lpmminfo->fccIOProc = mmioFOURCC('D', 'O', 'S', ' ');
1109                 lpmminfo->pIOProc = (LPMMIOPROC16) mmioDosIOProc;
1110
1111         }
1112         /* if just the four character code is present, look up IO proc */
1113         else if (lpmminfo->pIOProc == NULL) {
1114
1115                 lpmminfo->pIOProc = mmioInstallIOProc16(lpmminfo->fccIOProc, NULL, MMIO_FINDPROC);
1116
1117         }
1118         /* (if IO proc specified, use it and specified four character code) */
1119
1120         result = (UINT16) mmioSendMessage(hmmio, MMIOM_RENAME, (LPARAM) szFileName, (LPARAM) szNewFileName);
1121
1122         GlobalUnlock16(hmmio);
1123         GlobalFree16(hmmio);
1124
1125         return result;
1126 }
1127