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