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 "winbase.h"
  35 #include "winerror.h"
  36 #include "winreg.h"
  37 #include "winternl.h"
  38 #include "wine/debug.h"
  39 #include "ntdll_misc.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  42
  43 static CRITICAL_SECTION peb_lock;
  44 static CRITICAL_SECTION_DEBUG critsect_debug =
  45 {
  46     0, 0, &peb_lock,
  47     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  48       0, 0, { 0, (DWORD)(__FILE__ ": peb_lock") }
  49 };
  50 static CRITICAL_SECTION peb_lock = { &critsect_debug, -1, 0, 0, 0, 0 };
  51
  52 /* CRC polynomial 0xedb88320 */
  53 static const DWORD CRC_table[256] =
  54 {
  55     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
  56     0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  57     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
  58     0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  59     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  60     0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  61     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
  62     0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  63     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
  64     0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  65     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
  66     0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  67     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
  68     0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  69     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  70     0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  71     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
  72     0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  73     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
  74     0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  75     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
  76     0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  77     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
  78     0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  79     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  80     0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  81     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
  82     0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  83     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
  84     0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  85     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
  86     0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  87     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
  88     0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  89     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  90     0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  91     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
  92     0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  93     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
  94     0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  95     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
  96     0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  97     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  98 };
  99
 100 /*
 101  *      resource functions
 102  */
 103
 104 /***********************************************************************
 105  *           RtlInitializeResource      (NTDLL.@)
 106  *
 107  * xxxResource() functions implement multiple-reader-single-writer lock.
 108  * The code is based on information published in WDJ January 1999 issue.
 109  */
 110 void WINAPI RtlInitializeResource(LPRTL_RWLOCK rwl)
 111 {
 112     if( rwl )
 113     {
 114         rwl->iNumberActive = 0;
 115         rwl->uExclusiveWaiters = 0;
 116         rwl->uSharedWaiters = 0;
 117         rwl->hOwningThreadId = 0;
 118         rwl->dwTimeoutBoost = 0; /* no info on this one, default value is 0 */
 119         RtlInitializeCriticalSection( &rwl->rtlCS );
 120         NtCreateSemaphore( &rwl->hExclusiveReleaseSemaphore, 0, NULL, 0, 65535 );
 121         NtCreateSemaphore( &rwl->hSharedReleaseSemaphore, 0, NULL, 0, 65535 );
 122     }
 123 }
 124
 125
 126 /***********************************************************************
 127  *           RtlDeleteResource          (NTDLL.@)
 128  */
 129 void WINAPI RtlDeleteResource(LPRTL_RWLOCK rwl)
 130 {
 131     if( rwl )
 132     {
 133         RtlEnterCriticalSection( &rwl->rtlCS );
 134         if( rwl->iNumberActive || rwl->uExclusiveWaiters || rwl->uSharedWaiters )
 135             MESSAGE("Deleting active MRSW lock (%p), expect failure\n", rwl );
 136         rwl->hOwningThreadId = 0;
 137         rwl->uExclusiveWaiters = rwl->uSharedWaiters = 0;
 138         rwl->iNumberActive = 0;
 139         NtClose( rwl->hExclusiveReleaseSemaphore );
 140         NtClose( rwl->hSharedReleaseSemaphore );
 141         RtlLeaveCriticalSection( &rwl->rtlCS );
 142         RtlDeleteCriticalSection( &rwl->rtlCS );
 143     }
 144 }
 145
 146
 147 /***********************************************************************
 148  *          RtlAcquireResourceExclusive (NTDLL.@)
 149  */
 150 BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK rwl, BYTE fWait)
 151 {
 152     BYTE retVal = 0;
 153     if( !rwl ) return 0;
 154
 155 start:
 156     RtlEnterCriticalSection( &rwl->rtlCS );
 157     if( rwl->iNumberActive == 0 ) /* lock is free */
 158     {
 159         rwl->iNumberActive = -1;
 160         retVal = 1;
 161     }
 162     else if( rwl->iNumberActive < 0 ) /* exclusive lock in progress */
 163     {
 164          if( rwl->hOwningThreadId == (HANDLE)GetCurrentThreadId() )
 165          {
 166              retVal = 1;
 167              rwl->iNumberActive--;
 168              goto done;
 169          }
 170 wait:
 171          if( fWait )
 172          {
 173              rwl->uExclusiveWaiters++;
 174
 175              RtlLeaveCriticalSection( &rwl->rtlCS );
 176              if( NtWaitForSingleObject( rwl->hExclusiveReleaseSemaphore, FALSE, NULL ) == WAIT_FAILED )
 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     DWORD dwWait = WAIT_FAILED;
 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             if( (dwWait = NtWaitForSingleObject( rwl->hSharedReleaseSemaphore, FALSE, NULL )) == WAIT_FAILED )
 217                 goto done;
 218             goto start;
 219         }
 220     }
 221     else
 222     {
 223         if( dwWait != WAIT_OBJECT_0 ) /* otherwise RtlReleaseResource() has already done it */
 224             rwl->iNumberActive++;
 225         retVal = 1;
 226     }
 227 done:
 228     RtlLeaveCriticalSection( &rwl->rtlCS );
 229     return retVal;
 230 }
 231
 232
 233 /***********************************************************************
 234  *           RtlReleaseResource         (NTDLL.@)
 235  */
 236 void WINAPI RtlReleaseResource(LPRTL_RWLOCK rwl)
 237 {
 238     RtlEnterCriticalSection( &rwl->rtlCS );
 239
 240     if( rwl->iNumberActive > 0 ) /* have one or more readers */
 241     {
 242         if( --rwl->iNumberActive == 0 )
 243         {
 244             if( rwl->uExclusiveWaiters )
 245             {
 246 wake_exclusive:
 247                 rwl->uExclusiveWaiters--;
 248                 NtReleaseSemaphore( rwl->hExclusiveReleaseSemaphore, 1, NULL );
 249             }
 250         }
 251     }
 252     else
 253     if( rwl->iNumberActive < 0 ) /* have a writer, possibly recursive */
 254     {
 255         if( ++rwl->iNumberActive == 0 )
 256         {
 257             rwl->hOwningThreadId = 0;
 258             if( rwl->uExclusiveWaiters )
 259                 goto wake_exclusive;
 260             else
 261                 if( rwl->uSharedWaiters )
 262                 {
 263                     UINT n = rwl->uSharedWaiters;
 264                     rwl->iNumberActive = rwl->uSharedWaiters; /* prevent new writers from joining until
 265                                                                * all queued readers have done their thing */
 266                     rwl->uSharedWaiters = 0;
 267                     NtReleaseSemaphore( rwl->hSharedReleaseSemaphore, n, NULL );
 268                 }
 269         }
 270     }
 271     RtlLeaveCriticalSection( &rwl->rtlCS );
 272 }
 273
 274
 275 /***********************************************************************
 276  *           RtlDumpResource            (NTDLL.@)
 277  */
 278 void WINAPI RtlDumpResource(LPRTL_RWLOCK rwl)
 279 {
 280     if( rwl )
 281     {
 282         MESSAGE("RtlDumpResource(%p):\n\tactive count = %i\n\twaiting readers = %i\n\twaiting writers = %i\n",
 283                 rwl, rwl->iNumberActive, rwl->uSharedWaiters, rwl->uExclusiveWaiters );
 284         if( rwl->iNumberActive )
 285             MESSAGE("\towner thread = %p\n", rwl->hOwningThreadId );
 286     }
 287 }
 288
 289 /*
 290  *      misc functions
 291  */
 292
 293 /******************************************************************************
 294  *      DbgPrint        [NTDLL.@]
 295  */
 296 NTSTATUS WINAPIV DbgPrint(LPCSTR fmt, ...)
 297 {
 298   char buf[512];
 299   va_list args;
 300
 301   va_start(args, fmt);
 302   vsprintf(buf,fmt, args);
 303   va_end(args);
 304
 305   MESSAGE("DbgPrint says: %s",buf);
 306   /* hmm, raise exception? */
 307   return STATUS_SUCCESS;
 308 }
 309
 310
 311 /******************************************************************************
 312  *      DbgPrintEx      [NTDLL.@]
 313  */
 314 NTSTATUS WINAPIV DbgPrintEx(ULONG iComponentId, ULONG Level, LPCSTR fmt, ...)
 315 {
 316   char buf[1024];
 317   va_list args;
 318
 319   va_start(args, fmt);
 320   vsprintf(buf, fmt, args);
 321   va_end(args);
 322
 323   switch (Level & DPFLTR_MASK) {
 324   case DPFLTR_ERROR_LEVEL:   ERR("%lx: %s", iComponentId, buf); break;
 325   case DPFLTR_WARNING_LEVEL: WARN("%lx: %s", iComponentId, buf); break;
 326   case DPFLTR_TRACE_LEVEL:
 327   case DPFLTR_INFO_LEVEL:
 328   default:                   TRACE("%lx: %s", iComponentId, buf); break;
 329   }
 330   return STATUS_SUCCESS;
 331 }
 332
 333 /******************************************************************************
 334  *  RtlAcquirePebLock           [NTDLL.@]
 335  */
 336 VOID WINAPI RtlAcquirePebLock(void)
 337 {
 338     RtlEnterCriticalSection( &peb_lock );
 339 }
 340
 341 /******************************************************************************
 342  *  RtlReleasePebLock           [NTDLL.@]
 343  */
 344 VOID WINAPI RtlReleasePebLock(void)
 345 {
 346     RtlLeaveCriticalSection( &peb_lock );
 347 }
 348
 349 /******************************************************************************
 350  *  RtlNewSecurityObject                [NTDLL.@]
 351  */
 352 DWORD WINAPI RtlNewSecurityObject(DWORD x1,DWORD x2,DWORD x3,DWORD x4,DWORD x5,DWORD x6) {
 353         FIXME("(0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx),stub!\n",x1,x2,x3,x4,x5,x6);
 354         return 0;
 355 }
 356
 357 /******************************************************************************
 358  *  RtlDeleteSecurityObject             [NTDLL.@]
 359  */
 360 DWORD WINAPI RtlDeleteSecurityObject(DWORD x1) {
 361         FIXME("(0x%08lx),stub!\n",x1);
 362         return 0;
 363 }
 364
 365 /**************************************************************************
 366  *                 RtlGetNtProductType                  [NTDLL.@]
 367  */
 368 BOOLEAN WINAPI RtlGetNtProductType(LPDWORD type)
 369 {
 370     FIXME("(%p): stub\n", type);
 371     *type=3; /* dunno. 1 for client, 3 for server? */
 372     return 1;
 373 }
 374
 375 /**************************************************************************
 376  *                 _chkstk                              [NTDLL.@]
 377  *
 378  * Glorified "enter xxxx".
 379  */
 380 #ifdef __i386__
 381 void WINAPI NTDLL_chkstk( CONTEXT86 *context )
 382 {
 383     context->Esp -= context->Eax;
 384 }
 385 DEFINE_REGS_ENTRYPOINT( _chkstk, NTDLL_chkstk, 0, 0 );
 386 #endif
 387
 388 /**************************************************************************
 389  *                 _alloca_probe                        [NTDLL.@]
 390  *
 391  * Glorified "enter xxxx".
 392  */
 393 #ifdef __i386__
 394 void WINAPI NTDLL_alloca_probe( CONTEXT86 *context )
 395 {
 396     context->Esp -= context->Eax;
 397 }
 398 DEFINE_REGS_ENTRYPOINT( _alloca_probe, NTDLL_alloca_probe, 0, 0 );
 399 #endif
 400
 401
 402 /******************************************************************************
 403  *  RtlInitializeGenericTable           [NTDLL.@]
 404  */
 405 PVOID WINAPI RtlInitializeGenericTable(PVOID pTable, PVOID arg2, PVOID arg3, PVOID arg4, PVOID arg5)
 406 {
 407   FIXME("(%p,%p,%p,%p,%p) stub!\n", pTable, arg2, arg3, arg4, arg5);
 408   return NULL;
 409 }
 410
 411 /******************************************************************************
 412  *  RtlMoveMemory   [NTDLL.@]
 413  *
 414  * Move a block of memory that may overlap.
 415  *
 416  * PARAMS
 417  *  Destination [O] End destination for block
 418  *  Source      [O] Where to start copying from
 419  *  Length      [I] Number of bytes to copy
 420  *
 421  * RETURNS
 422  *  Nothing.
 423  */
 424 #undef RtlMoveMemory
 425 VOID WINAPI RtlMoveMemory( VOID *Destination, CONST VOID *Source, SIZE_T Length )
 426 {
 427     memmove(Destination, Source, Length);
 428 }
 429
 430 /******************************************************************************
 431  *  RtlFillMemory   [NTDLL.@]
 432  *
 433  * Set a block of memory with a value.
 434  *
 435  * PARAMS
 436  *  Destination [O] Block to fill
 437  *  Length      [I] Number of bytes to fill
 438  *  Fill        [I] Value to set
 439  *
 440  * RETURNS
 441  *  Nothing.
 442  */
 443 #undef RtlFillMemory
 444 VOID WINAPI RtlFillMemory( VOID *Destination, SIZE_T Length, BYTE Fill )
 445 {
 446     memset(Destination, Fill, Length);
 447 }
 448
 449 /******************************************************************************
 450  *  RtlZeroMemory   [NTDLL.@]
 451  *
 452  * Set a block of memory with 0's.
 453  *
 454  * PARAMS
 455  *  Destination [O] Block to fill
 456  *  Length      [I] Number of bytes to fill
 457  *
 458  * RETURNS
 459  *  Nothing.
 460  */
 461 #undef RtlZeroMemory
 462 VOID WINAPI RtlZeroMemory( VOID *Destination, SIZE_T Length )
 463 {
 464     memset(Destination, 0, Length);
 465 }
 466
 467 /******************************************************************************
 468  *  RtlCompareMemory   [NTDLL.@]
 469  *
 470  * Compare one block of memory with another
 471  *
 472  * PARAMS
 473  *  Source1 [I] Source block
 474  *  Source2 [I] Block to compare to Source1
 475  *  Length  [I] Number of bytes to compare
 476  *
 477  * RETURNS
 478  *  The length of the first byte at which Source1 and Source2 differ, or Length
 479  *  if they are the same.
 480  */
 481 SIZE_T WINAPI RtlCompareMemory( const VOID *Source1, const VOID *Source2, SIZE_T Length)
 482 {
 483     SIZE_T i;
 484     for(i=0; (i<Length) && (((const BYTE*)Source1)[i]==((const BYTE*)Source2)[i]); i++);
 485     return i;
 486 }
 487
 488 /******************************************************************************
 489  *  RtlCompareMemoryUlong   [NTDLL.@]
 490  *
 491  * Compare a block of memory with a value, a ULONG at a time
 492  *
 493  * PARAMS
 494  *  Source1 [I] Source block. This must be ULONG aligned
 495  *  Length  [I] Number of bytes to compare. This should be a multiple of 4
 496  *  dwVal   [I] Value to compare to
 497  *
 498  * RETURNS
 499  *  The byte position of the first byte at which Source1 is not dwVal.
 500  */
 501 SIZE_T WINAPI RtlCompareMemoryUlong(const ULONG *Source1, SIZE_T Length, ULONG dwVal)
 502 {
 503     SIZE_T i;
 504     for(i = 0; i < Length/sizeof(ULONG) && Source1[i] == dwVal; i++);
 505     return i * sizeof(ULONG);
 506 }
 507
 508 /******************************************************************************
 509  *  RtlAssert                           [NTDLL.@]
 510  *
 511  * Fail a debug assertion.
 512  *
 513  * RETURNS
 514  *  Nothing. This call does not return control to its caller.
 515  *
 516  * NOTES
 517  * Not implemented in non-debug versions.
 518  */
 519 void WINAPI RtlAssert(LPVOID x1,LPVOID x2,DWORD x3, DWORD x4)
 520 {
 521         FIXME("(%p,%p,0x%08lx,0x%08lx),stub\n",x1,x2,x3,x4);
 522 }
 523
 524 /*************************************************************************
 525  * RtlFillMemoryUlong   [NTDLL.@]
 526  *
 527  * Fill memory with a 32 bit (dword) value.
 528  *
 529  * PARAMS
 530  *  lpDest  [I] Bitmap pointer
 531  *  ulCount [I] Number of dwords to write
 532  *  ulValue [I] Value to fill with
 533  *
 534  * RETURNS
 535  *  Nothing.
 536  */
 537 VOID WINAPI RtlFillMemoryUlong(ULONG* lpDest, ULONG ulCount, ULONG ulValue)
 538 {
 539   TRACE("(%p,%ld,%ld)\n", lpDest, ulCount, ulValue);
 540
 541   ulCount /= sizeof(ULONG);
 542   while(ulCount--)
 543     *lpDest++ = ulValue;
 544 }
 545
 546 /*********************************************************************
 547  *                  RtlComputeCrc32   [NTDLL.@]
 548  *
 549  * Calculate the CRC32 checksum of a block of bytes
 550  *
 551  * PARAMS
 552  *  dwInitial [I] Initial CRC value
 553  *  pData     [I] Data block
 554  *  iLen      [I] Length of the byte block
 555  *
 556  * RETURNS
 557  *  The cumulative CRC32 of dwInitial and iLen bytes of the pData block.
 558  */
 559 DWORD WINAPI RtlComputeCrc32(DWORD dwInitial, PBYTE pData, INT iLen)
 560 {
 561   DWORD crc = ~dwInitial;
 562
 563   TRACE("(%ld,%p,%d)\n", dwInitial, pData, iLen);
 564
 565   while (iLen > 0)
 566   {
 567     crc = CRC_table[(crc ^ *pData) & 0xff] ^ (crc >> 8);
 568     pData++;
 569     iLen--;
 570   }
 571   return ~crc;
 572 }
 573
 574
 575 /*************************************************************************
 576  * RtlUlonglongByteSwap    [NTDLL.@]
 577  *
 578  * Swap the bytes of an unsigned long long value.
 579  *
 580  * PARAMS
 581  *  i [I] Value to swap bytes of
 582  *
 583  * RETURNS
 584  *  The value with its bytes swapped.
 585  */
 586 ULONGLONG __cdecl RtlUlonglongByteSwap(ULONGLONG i)
 587 {
 588   return ((ULONGLONG)RtlUlongByteSwap(i) << 32) | RtlUlongByteSwap(i>>32);
 589 }
 590
 591 /*************************************************************************
 592  * RtlUlongByteSwap    [NTDLL.@]
 593  *
 594  * Swap the bytes of an unsigned int value.
 595  *
 596  * NOTES
 597  *  ix86 version takes argument in %ecx. Other systems use the inline version.
 598  */
 599 #ifdef __i386__
 600 __ASM_GLOBAL_FUNC(NTDLL_RtlUlongByteSwap,
 601                   "movl %ecx,%eax\n\t"
 602                   "bswap %eax\n\t"
 603                   "ret");
 604 #endif
 605
 606 /*************************************************************************
 607  * RtlUshortByteSwap    [NTDLL.@]
 608  *
 609  * Swap the bytes of an unsigned short value.
 610  *
 611  * NOTES
 612  *  i386 version takes argument in %cx. Other systems use the inline version.
 613  */
 614 #ifdef __i386__
 615 __ASM_GLOBAL_FUNC(NTDLL_RtlUshortByteSwap,
 616                   "movb %ch,%al\n\t"
 617                   "movb %cl,%ah\n\t"
 618                   "ret");
 619 #endif
 620
 621
 622 /*************************************************************************
 623  * RtlUniform   [NTDLL.@]
 624  *
 625  * Generates an uniform random number
 626  *
 627  * PARAMS
 628  *  seed [O] The seed of the Random function
 629  *
 630  * RETURNS
 631  *  It returns a random number uniformly distributed over [0..MAXLONG-1].
 632  *
 633  * NOTES
 634  *  Generates an uniform random number using D.H. Lehmer's 1948 algorithm.
 635  *  In our case the algorithm is:
 636  *
 637  *|  result = (*seed * 0x7fffffed + 0x7fffffc3) % MAXLONG;
 638  *|
 639  *|  *seed = result;
 640  *
 641  * DIFFERENCES
 642  *  The native documentation states that the random number is
 643  *  uniformly distributed over [0..MAXLONG]. In reality the native
 644  *  function and our function return a random number uniformly
 645  *  distributed over [0..MAXLONG-1].
 646  */
 647 ULONG WINAPI RtlUniform (PULONG seed)
 648 {
 649     ULONG result;
 650
 651    /*
 652     * Instead of the algorithm stated above, we use the algorithm
 653     * below, which is totally equivalent (see the tests), but does
 654     * not use a division and therefore is faster.
 655     */
 656     result = *seed * 0xffffffed + 0x7fffffc3;
 657     if (result == 0xffffffff || result == 0x7ffffffe) {
 658         result = (result + 2) & MAXLONG;
 659     } else if (result == 0x7fffffff) {
 660         result = 0;
 661     } else if ((result & 0x80000000) == 0) {
 662         result = result + (~result & 1);
 663     } else {
 664         result = (result + (result & 1)) & MAXLONG;
 665     } /* if */
 666     *seed = result;
 667     return result;
 668 }
 669
 670
 671 /*************************************************************************
 672  * RtlRandom   [NTDLL.@]
 673  *
 674  * Generates a random number
 675  *
 676  * PARAMS
 677  *  seed [O] The seed of the Random function
 678  *
 679  * RETURNS
 680  *  It returns a random number distributed over [0..MAXLONG-1].
 681  */
 682 ULONG WINAPI RtlRandom (PULONG seed)
 683 {
 684     static ULONG saved_value[128] =
 685     { /*   0 */ 0x4c8bc0aa, 0x4c022957, 0x2232827a, 0x2f1e7626, 0x7f8bdafb, 0x5c37d02a, 0x0ab48f72, 0x2f0c4ffa,
 686       /*   8 */ 0x290e1954, 0x6b635f23, 0x5d3885c0, 0x74b49ff8, 0x5155fa54, 0x6214ad3f, 0x111e9c29, 0x242a3a09,
 687       /*  16 */ 0x75932ae1, 0x40ac432e, 0x54f7ba7a, 0x585ccbd5, 0x6df5c727, 0x0374dad1, 0x7112b3f1, 0x735fc311,
 688       /*  24 */ 0x404331a9, 0x74d97781, 0x64495118, 0x323e04be, 0x5974b425, 0x4862e393, 0x62389c1d, 0x28a68b82,
 689       /*  32 */ 0x0f95da37, 0x7a50bbc6, 0x09b0091c, 0x22cdb7b4, 0x4faaed26, 0x66417ccd, 0x189e4bfa, 0x1ce4e8dd,
 690       /*  40 */ 0x5274c742, 0x3bdcf4dc, 0x2d94e907, 0x32eac016, 0x26d33ca3, 0x60415a8a, 0x31f57880, 0x68c8aa52,
 691       /*  48 */ 0x23eb16da, 0x6204f4a1, 0x373927c1, 0x0d24eb7c, 0x06dd7379, 0x2b3be507, 0x0f9c55b1, 0x2c7925eb,
 692       /*  56 */ 0x36d67c9a, 0x42f831d9, 0x5e3961cb, 0x65d637a8, 0x24bb3820, 0x4d08e33d, 0x2188754f, 0x147e409e,
 693       /*  64 */ 0x6a9620a0, 0x62e26657, 0x7bd8ce81, 0x11da0abb, 0x5f9e7b50, 0x23e444b6, 0x25920c78, 0x5fc894f0,
 694       /*  72 */ 0x5e338cbb, 0x404237fd, 0x1d60f80f, 0x320a1743, 0x76013d2b, 0x070294ee, 0x695e243b, 0x56b177fd,
 695       /*  80 */ 0x752492e1, 0x6decd52f, 0x125f5219, 0x139d2e78, 0x1898d11e, 0x2f7ee785, 0x4db405d8, 0x1a028a35,
 696       /*  88 */ 0x63f6f323, 0x1f6d0078, 0x307cfd67, 0x3f32a78a, 0x6980796c, 0x462b3d83, 0x34b639f2, 0x53fce379,
 697       /*  96 */ 0x74ba50f4, 0x1abc2c4b, 0x5eeaeb8d, 0x335a7a0d, 0x3973dd20, 0x0462d66b, 0x159813ff, 0x1e4643fd,
 698       /* 104 */ 0x06bc5c62, 0x3115e3fc, 0x09101613, 0x47af2515, 0x4f11ec54, 0x78b99911, 0x3db8dd44, 0x1ec10b9b,
 699       /* 112 */ 0x5b5506ca, 0x773ce092, 0x567be81a, 0x5475b975, 0x7a2cde1a, 0x494536f5, 0x34737bb4, 0x76d9750b,
 700       /* 120 */ 0x2a1f6232, 0x2e49644d, 0x7dddcbe7, 0x500cebdb, 0x619dab9e, 0x48c626fe, 0x1cda3193, 0x52dabe9d };
 701     ULONG rand;
 702     int pos;
 703     ULONG result;
 704
 705     rand = (*seed * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 706     *seed = (rand * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 707     pos = *seed & 0x7f;
 708     result = saved_value[pos];
 709     saved_value[pos] = rand;
 710     return(result);
 711 }
 712
 713
 714 /*************************************************************************
 715  * RtlAreAllAccessesGranted   [NTDLL.@]
 716  *
 717  * Check if all desired accesses are granted
 718  *
 719  * RETURNS
 720  *  TRUE: All desired accesses are granted
 721  *  FALSE: Otherwise
 722  */
 723 BOOLEAN WINAPI RtlAreAllAccessesGranted(
 724     ACCESS_MASK GrantedAccess,
 725     ACCESS_MASK DesiredAccess)
 726 {
 727     return (GrantedAccess & DesiredAccess) == DesiredAccess;
 728 }
 729
 730
 731 /*************************************************************************
 732  * RtlAreAnyAccessesGranted   [NTDLL.@]
 733  *
 734  * Check if at least one of the desired accesses is granted
 735  *
 736  * PARAMS
 737  *  GrantedAccess [I] Access mask of granted accesses
 738  *  DesiredAccess [I] Access mask of desired accesses
 739  *
 740  * RETURNS
 741  *  TRUE: At least one of the desired accesses is granted
 742  *  FALSE: Otherwise
 743  */
 744 BOOLEAN WINAPI RtlAreAnyAccessesGranted(
 745     ACCESS_MASK GrantedAccess,
 746     ACCESS_MASK DesiredAccess)
 747 {
 748     return (GrantedAccess & DesiredAccess) != 0;
 749 }
 750
 751
 752 /*************************************************************************
 753  * RtlMapGenericMask   [NTDLL.@]
 754  *
 755  * Determine the nongeneric access rights specified by an access mask
 756  *
 757  * RETURNS
 758  *  Nothing.
 759  */
 760 void WINAPI RtlMapGenericMask(
 761     PACCESS_MASK AccessMask,
 762     const GENERIC_MAPPING *GenericMapping)
 763 {
 764     if (*AccessMask & GENERIC_READ) {
 765         *AccessMask |= GenericMapping->GenericRead;
 766     } /* if */
 767
 768     if (*AccessMask & GENERIC_WRITE) {
 769         *AccessMask |= GenericMapping->GenericWrite;
 770     } /* if */
 771
 772     if (*AccessMask & GENERIC_EXECUTE) {
 773         *AccessMask |= GenericMapping->GenericExecute;
 774     } /* if */
 775
 776     if (*AccessMask & GENERIC_ALL) {
 777         *AccessMask |= GenericMapping->GenericAll;
 778     } /* if */
 779
 780     *AccessMask &= 0x0FFFFFFF;
 781 }
 782
 783
 784 /*************************************************************************
 785  * RtlCopyLuid   [NTDLL.@]
 786  *
 787  * Copy a local unique ID.
 788  *
 789  * PARAMS
 790  *  LuidDest [O] Destination for the copied Luid
 791  *  LuidSrc  [I] Source Luid to copy to LuidDest
 792  *
 793  * RETURNS
 794  *  Nothing.
 795  */
 796 void WINAPI RtlCopyLuid (PLUID LuidDest, const LUID *LuidSrc)
 797 {
 798     *LuidDest = *LuidSrc;
 799 }
 800
 801
 802 /*************************************************************************
 803  * RtlEqualLuid   [NTDLL.@]
 804  *
 805  * Compare two local unique ID's.
 806  *
 807  * PARAMS
 808  *  Luid1 [I] First Luid to compare to Luid2
 809  *  Luid2 [I] Second Luid to compare to Luid1
 810  *
 811  * RETURNS
 812  *  TRUE: The two LUID's are equal.
 813  *  FALSE: Otherwise
 814  */
 815 BOOLEAN WINAPI RtlEqualLuid (const LUID *Luid1, const LUID *Luid2)
 816 {
 817   return (Luid1->LowPart ==  Luid2->LowPart && Luid1->HighPart == Luid2->HighPart);
 818 }
 819
 820
 821 /*************************************************************************
 822  * RtlCopyLuidAndAttributesArray   [NTDLL.@]
 823  *
 824  * Copy an array of local unique ID's and attributes.
 825  *
 826  * PARAMS
 827  *  Count [I] Number of Luid/attributes in Src
 828  *  Src   [I] Source Luid/attributes to copy
 829  *  Dest  [O] Destination for copied Luid/attributes
 830  *
 831  * RETURNS
 832  *  Nothing.
 833  *
 834  * NOTES
 835  *  Dest must be large enough to hold Src.
 836  */
 837 void WINAPI RtlCopyLuidAndAttributesArray(
 838     ULONG Count,
 839     const LUID_AND_ATTRIBUTES *Src,
 840     PLUID_AND_ATTRIBUTES Dest)
 841 {
 842     ULONG i;
 843
 844     for (i = 0; i < Count; i++) Dest[i] = Src[i];
 845 }