dlls/ntdll/rtl.c

   1 /*
   2  * NT basis DLL
   3  *
   4  * This file contains the Rtl* API functions. These should be implementable.
   5  *
   6  * Copyright 1996-1998 Marcus Meissner
   7  * Copyright 1999      Alex Korobka
   8  * Copyright 2003      Thomas Mertes
   9  * Crc32 code Copyright 1986 Gary S. Brown (Public domain)
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26 #include "config.h"
  27 #include "wine/port.h"
  28
  29 #include <stdlib.h>
  30 #include <stdarg.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include "windef.h"
  34 #include "winternl.h"
  35 #include "wine/debug.h"
  36 #include "ntdll_misc.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  39
  40 static RTL_CRITICAL_SECTION peb_lock;
  41 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
  42 {
  43     0, 0, &peb_lock,
  44     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  45       0, 0, { (DWORD_PTR)(__FILE__ ": peb_lock") }
  46 };
  47 static RTL_CRITICAL_SECTION peb_lock = { &critsect_debug, -1, 0, 0, 0, 0 };
  48
  49 /* CRC polynomial 0xedb88320 */
  50 static const DWORD CRC_table[256] =
  51 {
  52     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
  53     0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  54     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
  55     0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  56     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  57     0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  58     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
  59     0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  60     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
  61     0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  62     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
  63     0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  64     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
  65     0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  66     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  67     0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  68     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
  69     0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  70     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
  71     0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  72     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
  73     0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  74     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
  75     0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  76     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  77     0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  78     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
  79     0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  80     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
  81     0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  82     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
  83     0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  84     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
  85     0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  86     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  87     0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  88     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
  89     0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  90     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
  91     0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  92     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
  93     0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  94     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  95 };
  96
  97 /*
  98  *      resource functions
  99  */
 100
 101 /***********************************************************************
 102  *           RtlInitializeResource      (NTDLL.@)
 103  *
 104  * xxxResource() functions implement multiple-reader-single-writer lock.
 105  * The code is based on information published in WDJ January 1999 issue.
 106  */
 107 void WINAPI RtlInitializeResource(LPRTL_RWLOCK rwl)
 108 {
 109     if( rwl )
 110     {
 111         rwl->iNumberActive = 0;
 112         rwl->uExclusiveWaiters = 0;
 113         rwl->uSharedWaiters = 0;
 114         rwl->hOwningThreadId = 0;
 115         rwl->dwTimeoutBoost = 0; /* no info on this one, default value is 0 */
 116         RtlInitializeCriticalSection( &rwl->rtlCS );
 117         NtCreateSemaphore( &rwl->hExclusiveReleaseSemaphore, SEMAPHORE_ALL_ACCESS, NULL, 0, 65535 );
 118         NtCreateSemaphore( &rwl->hSharedReleaseSemaphore, SEMAPHORE_ALL_ACCESS, NULL, 0, 65535 );
 119     }
 120 }
 121
 122
 123 /***********************************************************************
 124  *           RtlDeleteResource          (NTDLL.@)
 125  */
 126 void WINAPI RtlDeleteResource(LPRTL_RWLOCK rwl)
 127 {
 128     if( rwl )
 129     {
 130         RtlEnterCriticalSection( &rwl->rtlCS );
 131         if( rwl->iNumberActive || rwl->uExclusiveWaiters || rwl->uSharedWaiters )
 132             MESSAGE("Deleting active MRSW lock (%p), expect failure\n", rwl );
 133         rwl->hOwningThreadId = 0;
 134         rwl->uExclusiveWaiters = rwl->uSharedWaiters = 0;
 135         rwl->iNumberActive = 0;
 136         NtClose( rwl->hExclusiveReleaseSemaphore );
 137         NtClose( rwl->hSharedReleaseSemaphore );
 138         RtlLeaveCriticalSection( &rwl->rtlCS );
 139         RtlDeleteCriticalSection( &rwl->rtlCS );
 140     }
 141 }
 142
 143
 144 /***********************************************************************
 145  *          RtlAcquireResourceExclusive (NTDLL.@)
 146  */
 147 BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK rwl, BYTE fWait)
 148 {
 149     BYTE retVal = 0;
 150     if( !rwl ) return 0;
 151
 152 start:
 153     RtlEnterCriticalSection( &rwl->rtlCS );
 154     if( rwl->iNumberActive == 0 ) /* lock is free */
 155     {
 156         rwl->iNumberActive = -1;
 157         retVal = 1;
 158     }
 159     else if( rwl->iNumberActive < 0 ) /* exclusive lock in progress */
 160     {
 161          if( rwl->hOwningThreadId == (HANDLE)GetCurrentThreadId() )
 162          {
 163              retVal = 1;
 164              rwl->iNumberActive--;
 165              goto done;
 166          }
 167 wait:
 168          if( fWait )
 169          {
 170              NTSTATUS status;
 171
 172              rwl->uExclusiveWaiters++;
 173
 174              RtlLeaveCriticalSection( &rwl->rtlCS );
 175              status = NtWaitForSingleObject( rwl->hExclusiveReleaseSemaphore, FALSE, NULL );
 176              if( HIWORD(status) )
 177                  goto done;
 178              goto start; /* restart the acquisition to avoid deadlocks */
 179          }
 180     }
 181     else  /* one or more shared locks are in progress */
 182          if( fWait )
 183              goto wait;
 184
 185     if( retVal == 1 )
 186         rwl->hOwningThreadId = (HANDLE)GetCurrentThreadId();
 187 done:
 188     RtlLeaveCriticalSection( &rwl->rtlCS );
 189     return retVal;
 190 }
 191
 192 /***********************************************************************
 193  *          RtlAcquireResourceShared    (NTDLL.@)
 194  */
 195 BYTE WINAPI RtlAcquireResourceShared(LPRTL_RWLOCK rwl, BYTE fWait)
 196 {
 197     NTSTATUS status = STATUS_UNSUCCESSFUL;
 198     BYTE retVal = 0;
 199     if( !rwl ) return 0;
 200
 201 start:
 202     RtlEnterCriticalSection( &rwl->rtlCS );
 203     if( rwl->iNumberActive < 0 )
 204     {
 205         if( rwl->hOwningThreadId == (HANDLE)GetCurrentThreadId() )
 206         {
 207             rwl->iNumberActive--;
 208             retVal = 1;
 209             goto done;
 210         }
 211
 212         if( fWait )
 213         {
 214             rwl->uSharedWaiters++;
 215             RtlLeaveCriticalSection( &rwl->rtlCS );
 216             status = NtWaitForSingleObject( rwl->hSharedReleaseSemaphore, FALSE, NULL );
 217             if( HIWORD(status) )
 218                 goto done;
 219             goto start;
 220         }
 221     }
 222     else
 223     {
 224         if( status != STATUS_WAIT_0 ) /* otherwise RtlReleaseResource() has already done it */
 225             rwl->iNumberActive++;
 226         retVal = 1;
 227     }
 228 done:
 229     RtlLeaveCriticalSection( &rwl->rtlCS );
 230     return retVal;
 231 }
 232
 233
 234 /***********************************************************************
 235  *           RtlReleaseResource         (NTDLL.@)
 236  */
 237 void WINAPI RtlReleaseResource(LPRTL_RWLOCK rwl)
 238 {
 239     RtlEnterCriticalSection( &rwl->rtlCS );
 240
 241     if( rwl->iNumberActive > 0 ) /* have one or more readers */
 242     {
 243         if( --rwl->iNumberActive == 0 )
 244         {
 245             if( rwl->uExclusiveWaiters )
 246             {
 247 wake_exclusive:
 248                 rwl->uExclusiveWaiters--;
 249                 NtReleaseSemaphore( rwl->hExclusiveReleaseSemaphore, 1, NULL );
 250             }
 251         }
 252     }
 253     else
 254     if( rwl->iNumberActive < 0 ) /* have a writer, possibly recursive */
 255     {
 256         if( ++rwl->iNumberActive == 0 )
 257         {
 258             rwl->hOwningThreadId = 0;
 259             if( rwl->uExclusiveWaiters )
 260                 goto wake_exclusive;
 261             else
 262                 if( rwl->uSharedWaiters )
 263                 {
 264                     UINT n = rwl->uSharedWaiters;
 265                     rwl->iNumberActive = rwl->uSharedWaiters; /* prevent new writers from joining until
 266                                                                * all queued readers have done their thing */
 267                     rwl->uSharedWaiters = 0;
 268                     NtReleaseSemaphore( rwl->hSharedReleaseSemaphore, n, NULL );
 269                 }
 270         }
 271     }
 272     RtlLeaveCriticalSection( &rwl->rtlCS );
 273 }
 274
 275
 276 /***********************************************************************
 277  *           RtlDumpResource            (NTDLL.@)
 278  */
 279 void WINAPI RtlDumpResource(LPRTL_RWLOCK rwl)
 280 {
 281     if( rwl )
 282     {
 283         MESSAGE("RtlDumpResource(%p):\n\tactive count = %i\n\twaiting readers = %i\n\twaiting writers = %i\n",
 284                 rwl, rwl->iNumberActive, rwl->uSharedWaiters, rwl->uExclusiveWaiters );
 285         if( rwl->iNumberActive )
 286             MESSAGE("\towner thread = %p\n", rwl->hOwningThreadId );
 287     }
 288 }
 289
 290 /*
 291  *      misc functions
 292  */
 293
 294 /******************************************************************************
 295  *      DbgPrint        [NTDLL.@]
 296  */
 297 NTSTATUS WINAPIV DbgPrint(LPCSTR fmt, ...)
 298 {
 299   char buf[512];
 300   va_list args;
 301
 302   va_start(args, fmt);
 303   vsprintf(buf,fmt, args);
 304   va_end(args);
 305
 306   MESSAGE("DbgPrint says: %s",buf);
 307   /* hmm, raise exception? */
 308   return STATUS_SUCCESS;
 309 }
 310
 311
 312 /******************************************************************************
 313  *      DbgPrintEx      [NTDLL.@]
 314  */
 315 NTSTATUS WINAPIV DbgPrintEx(ULONG iComponentId, ULONG Level, LPCSTR fmt, ...)
 316 {
 317     NTSTATUS ret;
 318     va_list args;
 319
 320     va_start(args, fmt);
 321     ret = vDbgPrintEx(iComponentId, Level, fmt, args);
 322     va_end(args);
 323     return ret;
 324 }
 325
 326 /******************************************************************************
 327  *      vDbgPrintEx     [NTDLL.@]
 328  */
 329 NTSTATUS WINAPI vDbgPrintEx( ULONG id, ULONG level, LPCSTR fmt, va_list args )
 330 {
 331     return vDbgPrintExWithPrefix( "", id, level, fmt, args );
 332 }
 333
 334 /******************************************************************************
 335  *      vDbgPrintExWithPrefix  [NTDLL.@]
 336  */
 337 NTSTATUS WINAPI vDbgPrintExWithPrefix( LPCSTR prefix, ULONG id, ULONG level, LPCSTR fmt, va_list args )
 338 {
 339     char buf[1024];
 340
 341     vsprintf(buf, fmt, args);
 342
 343     switch (level & DPFLTR_MASK)
 344     {
 345     case DPFLTR_ERROR_LEVEL:   ERR("%s%lx: %s", prefix, id, buf); break;
 346     case DPFLTR_WARNING_LEVEL: WARN("%s%lx: %s", prefix, id, buf); break;
 347     case DPFLTR_TRACE_LEVEL:
 348     case DPFLTR_INFO_LEVEL:
 349     default:                   TRACE("%s%lx: %s", prefix, id, buf); break;
 350     }
 351     return STATUS_SUCCESS;
 352 }
 353
 354 /******************************************************************************
 355  *  RtlAcquirePebLock           [NTDLL.@]
 356  */
 357 VOID WINAPI RtlAcquirePebLock(void)
 358 {
 359     RtlEnterCriticalSection( &peb_lock );
 360 }
 361
 362 /******************************************************************************
 363  *  RtlReleasePebLock           [NTDLL.@]
 364  */
 365 VOID WINAPI RtlReleasePebLock(void)
 366 {
 367     RtlLeaveCriticalSection( &peb_lock );
 368 }
 369
 370 /******************************************************************************
 371  *  RtlNewSecurityObject                [NTDLL.@]
 372  */
 373 DWORD WINAPI RtlNewSecurityObject(DWORD x1,DWORD x2,DWORD x3,DWORD x4,DWORD x5,DWORD x6) {
 374         FIXME("(0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx),stub!\n",x1,x2,x3,x4,x5,x6);
 375         return 0;
 376 }
 377
 378 /******************************************************************************
 379  *  RtlDeleteSecurityObject             [NTDLL.@]
 380  */
 381 DWORD WINAPI RtlDeleteSecurityObject(DWORD x1) {
 382         FIXME("(0x%08lx),stub!\n",x1);
 383         return 0;
 384 }
 385
 386 /**************************************************************************
 387  *                 _chkstk                              [NTDLL.@]
 388  *
 389  * Glorified "enter xxxx".
 390  */
 391 #ifdef __i386__
 392 void WINAPI __regs__chkstk( CONTEXT86 *context )
 393 {
 394     context->Esp -= context->Eax;
 395 }
 396 DEFINE_REGS_ENTRYPOINT( _chkstk, 0, 0 );
 397 #endif
 398
 399 /**************************************************************************
 400  *                 _alloca_probe                        [NTDLL.@]
 401  *
 402  * Glorified "enter xxxx".
 403  */
 404 #ifdef __i386__
 405 void WINAPI __regs__alloca_probe( CONTEXT86 *context )
 406 {
 407     context->Esp -= context->Eax;
 408 }
 409 DEFINE_REGS_ENTRYPOINT( _alloca_probe, 0, 0 );
 410 #endif
 411
 412
 413 /******************************************************************************
 414  *  RtlInitializeGenericTable           [NTDLL.@]
 415  */
 416 PVOID WINAPI RtlInitializeGenericTable(PVOID pTable, PVOID arg2, PVOID arg3, PVOID arg4, PVOID arg5)
 417 {
 418   FIXME("(%p,%p,%p,%p,%p) stub!\n", pTable, arg2, arg3, arg4, arg5);
 419   return NULL;
 420 }
 421
 422 /******************************************************************************
 423  *  RtlMoveMemory   [NTDLL.@]
 424  *
 425  * Move a block of memory that may overlap.
 426  *
 427  * PARAMS
 428  *  Destination [O] End destination for block
 429  *  Source      [O] Where to start copying from
 430  *  Length      [I] Number of bytes to copy
 431  *
 432  * RETURNS
 433  *  Nothing.
 434  */
 435 #undef RtlMoveMemory
 436 VOID WINAPI RtlMoveMemory( VOID *Destination, CONST VOID *Source, SIZE_T Length )
 437 {
 438     memmove(Destination, Source, Length);
 439 }
 440
 441 /******************************************************************************
 442  *  RtlFillMemory   [NTDLL.@]
 443  *
 444  * Set a block of memory with a value.
 445  *
 446  * PARAMS
 447  *  Destination [O] Block to fill
 448  *  Length      [I] Number of bytes to fill
 449  *  Fill        [I] Value to set
 450  *
 451  * RETURNS
 452  *  Nothing.
 453  */
 454 #undef RtlFillMemory
 455 VOID WINAPI RtlFillMemory( VOID *Destination, SIZE_T Length, BYTE Fill )
 456 {
 457     memset(Destination, Fill, Length);
 458 }
 459
 460 /******************************************************************************
 461  *  RtlZeroMemory   [NTDLL.@]
 462  *
 463  * Set a block of memory with 0's.
 464  *
 465  * PARAMS
 466  *  Destination [O] Block to fill
 467  *  Length      [I] Number of bytes to fill
 468  *
 469  * RETURNS
 470  *  Nothing.
 471  */
 472 #undef RtlZeroMemory
 473 VOID WINAPI RtlZeroMemory( VOID *Destination, SIZE_T Length )
 474 {
 475     memset(Destination, 0, Length);
 476 }
 477
 478 /******************************************************************************
 479  *  RtlCompareMemory   [NTDLL.@]
 480  *
 481  * Compare one block of memory with another
 482  *
 483  * PARAMS
 484  *  Source1 [I] Source block
 485  *  Source2 [I] Block to compare to Source1
 486  *  Length  [I] Number of bytes to compare
 487  *
 488  * RETURNS
 489  *  The length of the first byte at which Source1 and Source2 differ, or Length
 490  *  if they are the same.
 491  */
 492 SIZE_T WINAPI RtlCompareMemory( const VOID *Source1, const VOID *Source2, SIZE_T Length)
 493 {
 494     SIZE_T i;
 495     for(i=0; (i<Length) && (((const BYTE*)Source1)[i]==((const BYTE*)Source2)[i]); i++);
 496     return i;
 497 }
 498
 499 /******************************************************************************
 500  *  RtlCompareMemoryUlong   [NTDLL.@]
 501  *
 502  * Compare a block of memory with a value, a ULONG at a time
 503  *
 504  * PARAMS
 505  *  Source1 [I] Source block. This must be ULONG aligned
 506  *  Length  [I] Number of bytes to compare. This should be a multiple of 4
 507  *  dwVal   [I] Value to compare to
 508  *
 509  * RETURNS
 510  *  The byte position of the first byte at which Source1 is not dwVal.
 511  */
 512 SIZE_T WINAPI RtlCompareMemoryUlong(const ULONG *Source1, SIZE_T Length, ULONG dwVal)
 513 {
 514     SIZE_T i;
 515     for(i = 0; i < Length/sizeof(ULONG) && Source1[i] == dwVal; i++);
 516     return i * sizeof(ULONG);
 517 }
 518
 519 /******************************************************************************
 520  *  RtlAssert                           [NTDLL.@]
 521  *
 522  * Fail a debug assertion.
 523  *
 524  * RETURNS
 525  *  Nothing. This call does not return control to its caller.
 526  *
 527  * NOTES
 528  * Not implemented in non-debug versions.
 529  */
 530 void WINAPI RtlAssert(LPVOID x1,LPVOID x2,DWORD x3, DWORD x4)
 531 {
 532         FIXME("(%p,%p,0x%08lx,0x%08lx),stub\n",x1,x2,x3,x4);
 533 }
 534
 535 /*************************************************************************
 536  * RtlFillMemoryUlong   [NTDLL.@]
 537  *
 538  * Fill memory with a 32 bit (dword) value.
 539  *
 540  * PARAMS
 541  *  lpDest  [I] Bitmap pointer
 542  *  ulCount [I] Number of dwords to write
 543  *  ulValue [I] Value to fill with
 544  *
 545  * RETURNS
 546  *  Nothing.
 547  */
 548 VOID WINAPI RtlFillMemoryUlong(ULONG* lpDest, ULONG ulCount, ULONG ulValue)
 549 {
 550   TRACE("(%p,%ld,%ld)\n", lpDest, ulCount, ulValue);
 551
 552   ulCount /= sizeof(ULONG);
 553   while(ulCount--)
 554     *lpDest++ = ulValue;
 555 }
 556
 557 /*********************************************************************
 558  *                  RtlComputeCrc32   [NTDLL.@]
 559  *
 560  * Calculate the CRC32 checksum of a block of bytes
 561  *
 562  * PARAMS
 563  *  dwInitial [I] Initial CRC value
 564  *  pData     [I] Data block
 565  *  iLen      [I] Length of the byte block
 566  *
 567  * RETURNS
 568  *  The cumulative CRC32 of dwInitial and iLen bytes of the pData block.
 569  */
 570 DWORD WINAPI RtlComputeCrc32(DWORD dwInitial, PBYTE pData, INT iLen)
 571 {
 572   DWORD crc = ~dwInitial;
 573
 574   TRACE("(%ld,%p,%d)\n", dwInitial, pData, iLen);
 575
 576   while (iLen > 0)
 577   {
 578     crc = CRC_table[(crc ^ *pData) & 0xff] ^ (crc >> 8);
 579     pData++;
 580     iLen--;
 581   }
 582   return ~crc;
 583 }
 584
 585
 586 /*************************************************************************
 587  * RtlUlonglongByteSwap    [NTDLL.@]
 588  *
 589  * Swap the bytes of an unsigned long long value.
 590  *
 591  * PARAMS
 592  *  i [I] Value to swap bytes of
 593  *
 594  * RETURNS
 595  *  The value with its bytes swapped.
 596  */
 597 ULONGLONG __cdecl RtlUlonglongByteSwap(ULONGLONG i)
 598 {
 599   return ((ULONGLONG)RtlUlongByteSwap(i) << 32) | RtlUlongByteSwap(i>>32);
 600 }
 601
 602 /*************************************************************************
 603  * RtlUlongByteSwap    [NTDLL.@]
 604  *
 605  * Swap the bytes of an unsigned int value.
 606  *
 607  * NOTES
 608  *  ix86 version takes argument in %ecx. Other systems use the inline version.
 609  */
 610 #ifdef __i386__
 611 __ASM_GLOBAL_FUNC(NTDLL_RtlUlongByteSwap,
 612                   "movl %ecx,%eax\n\t"
 613                   "bswap %eax\n\t"
 614                   "ret");
 615 #endif
 616
 617 /*************************************************************************
 618  * RtlUshortByteSwap    [NTDLL.@]
 619  *
 620  * Swap the bytes of an unsigned short value.
 621  *
 622  * NOTES
 623  *  i386 version takes argument in %cx. Other systems use the inline version.
 624  */
 625 #ifdef __i386__
 626 __ASM_GLOBAL_FUNC(NTDLL_RtlUshortByteSwap,
 627                   "movb %ch,%al\n\t"
 628                   "movb %cl,%ah\n\t"
 629                   "ret");
 630 #endif
 631
 632
 633 /*************************************************************************
 634  * RtlUniform   [NTDLL.@]
 635  *
 636  * Generates an uniform random number
 637  *
 638  * PARAMS
 639  *  seed [O] The seed of the Random function
 640  *
 641  * RETURNS
 642  *  It returns a random number uniformly distributed over [0..MAXLONG-1].
 643  *
 644  * NOTES
 645  *  Generates an uniform random number using D.H. Lehmer's 1948 algorithm.
 646  *  In our case the algorithm is:
 647  *
 648  *|  result = (*seed * 0x7fffffed + 0x7fffffc3) % MAXLONG;
 649  *|
 650  *|  *seed = result;
 651  *
 652  * DIFFERENCES
 653  *  The native documentation states that the random number is
 654  *  uniformly distributed over [0..MAXLONG]. In reality the native
 655  *  function and our function return a random number uniformly
 656  *  distributed over [0..MAXLONG-1].
 657  */
 658 ULONG WINAPI RtlUniform (PULONG seed)
 659 {
 660     ULONG result;
 661
 662    /*
 663     * Instead of the algorithm stated above, we use the algorithm
 664     * below, which is totally equivalent (see the tests), but does
 665     * not use a division and therefore is faster.
 666     */
 667     result = *seed * 0xffffffed + 0x7fffffc3;
 668     if (result == 0xffffffff || result == 0x7ffffffe) {
 669         result = (result + 2) & MAXLONG;
 670     } else if (result == 0x7fffffff) {
 671         result = 0;
 672     } else if ((result & 0x80000000) == 0) {
 673         result = result + (~result & 1);
 674     } else {
 675         result = (result + (result & 1)) & MAXLONG;
 676     } /* if */
 677     *seed = result;
 678     return result;
 679 }
 680
 681
 682 /*************************************************************************
 683  * RtlRandom   [NTDLL.@]
 684  *
 685  * Generates a random number
 686  *
 687  * PARAMS
 688  *  seed [O] The seed of the Random function
 689  *
 690  * RETURNS
 691  *  It returns a random number distributed over [0..MAXLONG-1].
 692  */
 693 ULONG WINAPI RtlRandom (PULONG seed)
 694 {
 695     static ULONG saved_value[128] =
 696     { /*   0 */ 0x4c8bc0aa, 0x4c022957, 0x2232827a, 0x2f1e7626, 0x7f8bdafb, 0x5c37d02a, 0x0ab48f72, 0x2f0c4ffa,
 697       /*   8 */ 0x290e1954, 0x6b635f23, 0x5d3885c0, 0x74b49ff8, 0x5155fa54, 0x6214ad3f, 0x111e9c29, 0x242a3a09,
 698       /*  16 */ 0x75932ae1, 0x40ac432e, 0x54f7ba7a, 0x585ccbd5, 0x6df5c727, 0x0374dad1, 0x7112b3f1, 0x735fc311,
 699       /*  24 */ 0x404331a9, 0x74d97781, 0x64495118, 0x323e04be, 0x5974b425, 0x4862e393, 0x62389c1d, 0x28a68b82,
 700       /*  32 */ 0x0f95da37, 0x7a50bbc6, 0x09b0091c, 0x22cdb7b4, 0x4faaed26, 0x66417ccd, 0x189e4bfa, 0x1ce4e8dd,
 701       /*  40 */ 0x5274c742, 0x3bdcf4dc, 0x2d94e907, 0x32eac016, 0x26d33ca3, 0x60415a8a, 0x31f57880, 0x68c8aa52,
 702       /*  48 */ 0x23eb16da, 0x6204f4a1, 0x373927c1, 0x0d24eb7c, 0x06dd7379, 0x2b3be507, 0x0f9c55b1, 0x2c7925eb,
 703       /*  56 */ 0x36d67c9a, 0x42f831d9, 0x5e3961cb, 0x65d637a8, 0x24bb3820, 0x4d08e33d, 0x2188754f, 0x147e409e,
 704       /*  64 */ 0x6a9620a0, 0x62e26657, 0x7bd8ce81, 0x11da0abb, 0x5f9e7b50, 0x23e444b6, 0x25920c78, 0x5fc894f0,
 705       /*  72 */ 0x5e338cbb, 0x404237fd, 0x1d60f80f, 0x320a1743, 0x76013d2b, 0x070294ee, 0x695e243b, 0x56b177fd,
 706       /*  80 */ 0x752492e1, 0x6decd52f, 0x125f5219, 0x139d2e78, 0x1898d11e, 0x2f7ee785, 0x4db405d8, 0x1a028a35,
 707       /*  88 */ 0x63f6f323, 0x1f6d0078, 0x307cfd67, 0x3f32a78a, 0x6980796c, 0x462b3d83, 0x34b639f2, 0x53fce379,
 708       /*  96 */ 0x74ba50f4, 0x1abc2c4b, 0x5eeaeb8d, 0x335a7a0d, 0x3973dd20, 0x0462d66b, 0x159813ff, 0x1e4643fd,
 709       /* 104 */ 0x06bc5c62, 0x3115e3fc, 0x09101613, 0x47af2515, 0x4f11ec54, 0x78b99911, 0x3db8dd44, 0x1ec10b9b,
 710       /* 112 */ 0x5b5506ca, 0x773ce092, 0x567be81a, 0x5475b975, 0x7a2cde1a, 0x494536f5, 0x34737bb4, 0x76d9750b,
 711       /* 120 */ 0x2a1f6232, 0x2e49644d, 0x7dddcbe7, 0x500cebdb, 0x619dab9e, 0x48c626fe, 0x1cda3193, 0x52dabe9d };
 712     ULONG rand;
 713     int pos;
 714     ULONG result;
 715
 716     rand = (*seed * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 717     *seed = (rand * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 718     pos = *seed & 0x7f;
 719     result = saved_value[pos];
 720     saved_value[pos] = rand;
 721     return(result);
 722 }
 723
 724
 725 /*************************************************************************
 726  * RtlAreAllAccessesGranted   [NTDLL.@]
 727  *
 728  * Check if all desired accesses are granted
 729  *
 730  * RETURNS
 731  *  TRUE: All desired accesses are granted
 732  *  FALSE: Otherwise
 733  */
 734 BOOLEAN WINAPI RtlAreAllAccessesGranted(
 735     ACCESS_MASK GrantedAccess,
 736     ACCESS_MASK DesiredAccess)
 737 {
 738     return (GrantedAccess & DesiredAccess) == DesiredAccess;
 739 }
 740
 741
 742 /*************************************************************************
 743  * RtlAreAnyAccessesGranted   [NTDLL.@]
 744  *
 745  * Check if at least one of the desired accesses is granted
 746  *
 747  * PARAMS
 748  *  GrantedAccess [I] Access mask of granted accesses
 749  *  DesiredAccess [I] Access mask of desired accesses
 750  *
 751  * RETURNS
 752  *  TRUE: At least one of the desired accesses is granted
 753  *  FALSE: Otherwise
 754  */
 755 BOOLEAN WINAPI RtlAreAnyAccessesGranted(
 756     ACCESS_MASK GrantedAccess,
 757     ACCESS_MASK DesiredAccess)
 758 {
 759     return (GrantedAccess & DesiredAccess) != 0;
 760 }
 761
 762
 763 /*************************************************************************
 764  * RtlMapGenericMask   [NTDLL.@]
 765  *
 766  * Determine the nongeneric access rights specified by an access mask
 767  *
 768  * RETURNS
 769  *  Nothing.
 770  */
 771 void WINAPI RtlMapGenericMask(
 772     PACCESS_MASK AccessMask,
 773     const GENERIC_MAPPING *GenericMapping)
 774 {
 775     if (*AccessMask & GENERIC_READ) {
 776         *AccessMask |= GenericMapping->GenericRead;
 777     } /* if */
 778
 779     if (*AccessMask & GENERIC_WRITE) {
 780         *AccessMask |= GenericMapping->GenericWrite;
 781     } /* if */
 782
 783     if (*AccessMask & GENERIC_EXECUTE) {
 784         *AccessMask |= GenericMapping->GenericExecute;
 785     } /* if */
 786
 787     if (*AccessMask & GENERIC_ALL) {
 788         *AccessMask |= GenericMapping->GenericAll;
 789     } /* if */
 790
 791     *AccessMask &= 0x0FFFFFFF;
 792 }
 793
 794
 795 /*************************************************************************
 796  * RtlCopyLuid   [NTDLL.@]
 797  *
 798  * Copy a local unique ID.
 799  *
 800  * PARAMS
 801  *  LuidDest [O] Destination for the copied Luid
 802  *  LuidSrc  [I] Source Luid to copy to LuidDest
 803  *
 804  * RETURNS
 805  *  Nothing.
 806  */
 807 void WINAPI RtlCopyLuid (PLUID LuidDest, const LUID *LuidSrc)
 808 {
 809     *LuidDest = *LuidSrc;
 810 }
 811
 812
 813 /*************************************************************************
 814  * RtlEqualLuid   [NTDLL.@]
 815  *
 816  * Compare two local unique ID's.
 817  *
 818  * PARAMS
 819  *  Luid1 [I] First Luid to compare to Luid2
 820  *  Luid2 [I] Second Luid to compare to Luid1
 821  *
 822  * RETURNS
 823  *  TRUE: The two LUID's are equal.
 824  *  FALSE: Otherwise
 825  */
 826 BOOLEAN WINAPI RtlEqualLuid (const LUID *Luid1, const LUID *Luid2)
 827 {
 828   return (Luid1->LowPart ==  Luid2->LowPart && Luid1->HighPart == Luid2->HighPart);
 829 }
 830
 831
 832 /*************************************************************************
 833  * RtlCopyLuidAndAttributesArray   [NTDLL.@]
 834  *
 835  * Copy an array of local unique ID's and attributes.
 836  *
 837  * PARAMS
 838  *  Count [I] Number of Luid/attributes in Src
 839  *  Src   [I] Source Luid/attributes to copy
 840  *  Dest  [O] Destination for copied Luid/attributes
 841  *
 842  * RETURNS
 843  *  Nothing.
 844  *
 845  * NOTES
 846  *  Dest must be large enough to hold Src.
 847  */
 848 void WINAPI RtlCopyLuidAndAttributesArray(
 849     ULONG Count,
 850     const LUID_AND_ATTRIBUTES *Src,
 851     PLUID_AND_ATTRIBUTES Dest)
 852 {
 853     ULONG i;
 854
 855     for (i = 0; i < Count; i++) Dest[i] = Src[i];
 856 }