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 "ntstatus.h"
  34 #define WIN32_NO_STATUS
  35 #include "windef.h"
  36 #include "winternl.h"
  37 #include "wine/debug.h"
  38 #include "ntdll_misc.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  41
  42 static RTL_CRITICAL_SECTION peb_lock;
  43 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
  44 {
  45     0, 0, &peb_lock,
  46     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  47       0, 0, { (DWORD_PTR)(__FILE__ ": peb_lock") }
  48 };
  49 static RTL_CRITICAL_SECTION peb_lock = { &critsect_debug, -1, 0, 0, 0, 0 };
  50
  51 /* CRC polynomial 0xedb88320 */
  52 static const DWORD CRC_table[256] =
  53 {
  54     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
  55     0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  56     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
  57     0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  58     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  59     0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  60     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
  61     0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  62     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
  63     0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  64     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
  65     0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  66     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
  67     0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  68     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  69     0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  70     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
  71     0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  72     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
  73     0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  74     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
  75     0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  76     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
  77     0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  78     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  79     0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  80     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
  81     0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  82     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
  83     0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  84     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
  85     0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  86     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
  87     0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  88     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  89     0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  90     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
  91     0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  92     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
  93     0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  94     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
  95     0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  96     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  97 };
  98
  99 /*
 100  *      resource functions
 101  */
 102
 103 /***********************************************************************
 104  *           RtlInitializeResource      (NTDLL.@)
 105  *
 106  * xxxResource() functions implement multiple-reader-single-writer lock.
 107  * The code is based on information published in WDJ January 1999 issue.
 108  */
 109 void WINAPI RtlInitializeResource(LPRTL_RWLOCK rwl)
 110 {
 111     if( rwl )
 112     {
 113         rwl->iNumberActive = 0;
 114         rwl->uExclusiveWaiters = 0;
 115         rwl->uSharedWaiters = 0;
 116         rwl->hOwningThreadId = 0;
 117         rwl->dwTimeoutBoost = 0; /* no info on this one, default value is 0 */
 118         RtlInitializeCriticalSection( &rwl->rtlCS );
 119         NtCreateSemaphore( &rwl->hExclusiveReleaseSemaphore, SEMAPHORE_ALL_ACCESS, NULL, 0, 65535 );
 120         NtCreateSemaphore( &rwl->hSharedReleaseSemaphore, SEMAPHORE_ALL_ACCESS, NULL, 0, 65535 );
 121     }
 122 }
 123
 124
 125 /***********************************************************************
 126  *           RtlDeleteResource          (NTDLL.@)
 127  */
 128 void WINAPI RtlDeleteResource(LPRTL_RWLOCK rwl)
 129 {
 130     if( rwl )
 131     {
 132         RtlEnterCriticalSection( &rwl->rtlCS );
 133         if( rwl->iNumberActive || rwl->uExclusiveWaiters || rwl->uSharedWaiters )
 134             MESSAGE("Deleting active MRSW lock (%p), expect failure\n", rwl );
 135         rwl->hOwningThreadId = 0;
 136         rwl->uExclusiveWaiters = rwl->uSharedWaiters = 0;
 137         rwl->iNumberActive = 0;
 138         NtClose( rwl->hExclusiveReleaseSemaphore );
 139         NtClose( rwl->hSharedReleaseSemaphore );
 140         RtlLeaveCriticalSection( &rwl->rtlCS );
 141         RtlDeleteCriticalSection( &rwl->rtlCS );
 142     }
 143 }
 144
 145
 146 /***********************************************************************
 147  *          RtlAcquireResourceExclusive (NTDLL.@)
 148  */
 149 BYTE WINAPI RtlAcquireResourceExclusive(LPRTL_RWLOCK rwl, BYTE fWait)
 150 {
 151     BYTE retVal = 0;
 152     if( !rwl ) return 0;
 153
 154 start:
 155     RtlEnterCriticalSection( &rwl->rtlCS );
 156     if( rwl->iNumberActive == 0 ) /* lock is free */
 157     {
 158         rwl->iNumberActive = -1;
 159         retVal = 1;
 160     }
 161     else if( rwl->iNumberActive < 0 ) /* exclusive lock in progress */
 162     {
 163          if( rwl->hOwningThreadId == (HANDLE)GetCurrentThreadId() )
 164          {
 165              retVal = 1;
 166              rwl->iNumberActive--;
 167              goto done;
 168          }
 169 wait:
 170          if( fWait )
 171          {
 172              NTSTATUS status;
 173
 174              rwl->uExclusiveWaiters++;
 175
 176              RtlLeaveCriticalSection( &rwl->rtlCS );
 177              status = NtWaitForSingleObject( rwl->hExclusiveReleaseSemaphore, FALSE, NULL );
 178              if( HIWORD(status) )
 179                  goto done;
 180              goto start; /* restart the acquisition to avoid deadlocks */
 181          }
 182     }
 183     else  /* one or more shared locks are in progress */
 184          if( fWait )
 185              goto wait;
 186
 187     if( retVal == 1 )
 188         rwl->hOwningThreadId = (HANDLE)GetCurrentThreadId();
 189 done:
 190     RtlLeaveCriticalSection( &rwl->rtlCS );
 191     return retVal;
 192 }
 193
 194 /***********************************************************************
 195  *          RtlAcquireResourceShared    (NTDLL.@)
 196  */
 197 BYTE WINAPI RtlAcquireResourceShared(LPRTL_RWLOCK rwl, BYTE fWait)
 198 {
 199     NTSTATUS status = STATUS_UNSUCCESSFUL;
 200     BYTE retVal = 0;
 201     if( !rwl ) return 0;
 202
 203 start:
 204     RtlEnterCriticalSection( &rwl->rtlCS );
 205     if( rwl->iNumberActive < 0 )
 206     {
 207         if( rwl->hOwningThreadId == (HANDLE)GetCurrentThreadId() )
 208         {
 209             rwl->iNumberActive--;
 210             retVal = 1;
 211             goto done;
 212         }
 213
 214         if( fWait )
 215         {
 216             rwl->uSharedWaiters++;
 217             RtlLeaveCriticalSection( &rwl->rtlCS );
 218             status = NtWaitForSingleObject( rwl->hSharedReleaseSemaphore, FALSE, NULL );
 219             if( HIWORD(status) )
 220                 goto done;
 221             goto start;
 222         }
 223     }
 224     else
 225     {
 226         if( status != STATUS_WAIT_0 ) /* otherwise RtlReleaseResource() has already done it */
 227             rwl->iNumberActive++;
 228         retVal = 1;
 229     }
 230 done:
 231     RtlLeaveCriticalSection( &rwl->rtlCS );
 232     return retVal;
 233 }
 234
 235
 236 /***********************************************************************
 237  *           RtlReleaseResource         (NTDLL.@)
 238  */
 239 void WINAPI RtlReleaseResource(LPRTL_RWLOCK rwl)
 240 {
 241     RtlEnterCriticalSection( &rwl->rtlCS );
 242
 243     if( rwl->iNumberActive > 0 ) /* have one or more readers */
 244     {
 245         if( --rwl->iNumberActive == 0 )
 246         {
 247             if( rwl->uExclusiveWaiters )
 248             {
 249 wake_exclusive:
 250                 rwl->uExclusiveWaiters--;
 251                 NtReleaseSemaphore( rwl->hExclusiveReleaseSemaphore, 1, NULL );
 252             }
 253         }
 254     }
 255     else
 256     if( rwl->iNumberActive < 0 ) /* have a writer, possibly recursive */
 257     {
 258         if( ++rwl->iNumberActive == 0 )
 259         {
 260             rwl->hOwningThreadId = 0;
 261             if( rwl->uExclusiveWaiters )
 262                 goto wake_exclusive;
 263             else
 264                 if( rwl->uSharedWaiters )
 265                 {
 266                     UINT n = rwl->uSharedWaiters;
 267                     rwl->iNumberActive = rwl->uSharedWaiters; /* prevent new writers from joining until
 268                                                                * all queued readers have done their thing */
 269                     rwl->uSharedWaiters = 0;
 270                     NtReleaseSemaphore( rwl->hSharedReleaseSemaphore, n, NULL );
 271                 }
 272         }
 273     }
 274     RtlLeaveCriticalSection( &rwl->rtlCS );
 275 }
 276
 277
 278 /***********************************************************************
 279  *           RtlDumpResource            (NTDLL.@)
 280  */
 281 void WINAPI RtlDumpResource(LPRTL_RWLOCK rwl)
 282 {
 283     if( rwl )
 284     {
 285         MESSAGE("RtlDumpResource(%p):\n\tactive count = %i\n\twaiting readers = %i\n\twaiting writers = %i\n",
 286                 rwl, rwl->iNumberActive, rwl->uSharedWaiters, rwl->uExclusiveWaiters );
 287         if( rwl->iNumberActive )
 288             MESSAGE("\towner thread = %p\n", rwl->hOwningThreadId );
 289     }
 290 }
 291
 292 /*
 293  *      misc functions
 294  */
 295
 296 /******************************************************************************
 297  *      DbgPrint        [NTDLL.@]
 298  */
 299 NTSTATUS WINAPIV DbgPrint(LPCSTR fmt, ...)
 300 {
 301   char buf[512];
 302   va_list args;
 303
 304   va_start(args, fmt);
 305   vsprintf(buf,fmt, args);
 306   va_end(args);
 307
 308   MESSAGE("DbgPrint says: %s",buf);
 309   /* hmm, raise exception? */
 310   return STATUS_SUCCESS;
 311 }
 312
 313
 314 /******************************************************************************
 315  *      DbgPrintEx      [NTDLL.@]
 316  */
 317 NTSTATUS WINAPIV DbgPrintEx(ULONG iComponentId, ULONG Level, LPCSTR fmt, ...)
 318 {
 319     NTSTATUS ret;
 320     va_list args;
 321
 322     va_start(args, fmt);
 323     ret = vDbgPrintEx(iComponentId, Level, fmt, args);
 324     va_end(args);
 325     return ret;
 326 }
 327
 328 /******************************************************************************
 329  *      vDbgPrintEx     [NTDLL.@]
 330  */
 331 NTSTATUS WINAPI vDbgPrintEx( ULONG id, ULONG level, LPCSTR fmt, va_list args )
 332 {
 333     return vDbgPrintExWithPrefix( "", id, level, fmt, args );
 334 }
 335
 336 /******************************************************************************
 337  *      vDbgPrintExWithPrefix  [NTDLL.@]
 338  */
 339 NTSTATUS WINAPI vDbgPrintExWithPrefix( LPCSTR prefix, ULONG id, ULONG level, LPCSTR fmt, va_list args )
 340 {
 341     char buf[1024];
 342
 343     vsprintf(buf, fmt, args);
 344
 345     switch (level & DPFLTR_MASK)
 346     {
 347     case DPFLTR_ERROR_LEVEL:   ERR("%s%lx: %s", prefix, id, buf); break;
 348     case DPFLTR_WARNING_LEVEL: WARN("%s%lx: %s", prefix, id, buf); break;
 349     case DPFLTR_TRACE_LEVEL:
 350     case DPFLTR_INFO_LEVEL:
 351     default:                   TRACE("%s%lx: %s", prefix, id, buf); break;
 352     }
 353     return STATUS_SUCCESS;
 354 }
 355
 356 /******************************************************************************
 357  *  RtlAcquirePebLock           [NTDLL.@]
 358  */
 359 VOID WINAPI RtlAcquirePebLock(void)
 360 {
 361     RtlEnterCriticalSection( &peb_lock );
 362 }
 363
 364 /******************************************************************************
 365  *  RtlReleasePebLock           [NTDLL.@]
 366  */
 367 VOID WINAPI RtlReleasePebLock(void)
 368 {
 369     RtlLeaveCriticalSection( &peb_lock );
 370 }
 371
 372 /******************************************************************************
 373  *  RtlNewSecurityObject                [NTDLL.@]
 374  */
 375 DWORD WINAPI RtlNewSecurityObject(DWORD x1,DWORD x2,DWORD x3,DWORD x4,DWORD x5,DWORD x6) {
 376         FIXME("(0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx,0x%08lx),stub!\n",x1,x2,x3,x4,x5,x6);
 377         return 0;
 378 }
 379
 380 /******************************************************************************
 381  *  RtlDeleteSecurityObject             [NTDLL.@]
 382  */
 383 DWORD WINAPI RtlDeleteSecurityObject(DWORD x1) {
 384         FIXME("(0x%08lx),stub!\n",x1);
 385         return 0;
 386 }
 387
 388 /**************************************************************************
 389  *                 _chkstk                              [NTDLL.@]
 390  *
 391  * Glorified "enter xxxx".
 392  */
 393 #ifdef __i386__
 394 __ASM_GLOBAL_FUNC( _chkstk,
 395                    "negl %eax\n\t"
 396                    "addl %esp,%eax\n\t"
 397                    "xchgl %esp,%eax\n\t"
 398                    "movl 0(%eax),%eax\n\t"  /* copy return address from old location */
 399                    "movl %eax,0(%esp)\n\t"
 400                    "ret" );
 401 #endif
 402
 403 /**************************************************************************
 404  *                 _alloca_probe                        [NTDLL.@]
 405  *
 406  * Glorified "enter xxxx".
 407  */
 408 #ifdef __i386__
 409 __ASM_GLOBAL_FUNC( _alloca_probe,
 410                    "negl %eax\n\t"
 411                    "addl %esp,%eax\n\t"
 412                    "xchgl %esp,%eax\n\t"
 413                    "movl 0(%eax),%eax\n\t"  /* copy return address from old location */
 414                    "movl %eax,0(%esp)\n\t"
 415                    "ret" );
 416 #endif
 417
 418
 419 /******************************************************************************
 420  *  RtlInitializeGenericTable           [NTDLL.@]
 421  */
 422 PVOID WINAPI RtlInitializeGenericTable(PVOID pTable, PVOID arg2, PVOID arg3, PVOID arg4, PVOID arg5)
 423 {
 424   FIXME("(%p,%p,%p,%p,%p) stub!\n", pTable, arg2, arg3, arg4, arg5);
 425   return NULL;
 426 }
 427
 428 /******************************************************************************
 429  *  RtlMoveMemory   [NTDLL.@]
 430  *
 431  * Move a block of memory that may overlap.
 432  *
 433  * PARAMS
 434  *  Destination [O] End destination for block
 435  *  Source      [O] Where to start copying from
 436  *  Length      [I] Number of bytes to copy
 437  *
 438  * RETURNS
 439  *  Nothing.
 440  */
 441 #undef RtlMoveMemory
 442 VOID WINAPI RtlMoveMemory( VOID *Destination, CONST VOID *Source, SIZE_T Length )
 443 {
 444     memmove(Destination, Source, Length);
 445 }
 446
 447 /******************************************************************************
 448  *  RtlFillMemory   [NTDLL.@]
 449  *
 450  * Set a block of memory with a value.
 451  *
 452  * PARAMS
 453  *  Destination [O] Block to fill
 454  *  Length      [I] Number of bytes to fill
 455  *  Fill        [I] Value to set
 456  *
 457  * RETURNS
 458  *  Nothing.
 459  */
 460 #undef RtlFillMemory
 461 VOID WINAPI RtlFillMemory( VOID *Destination, SIZE_T Length, BYTE Fill )
 462 {
 463     memset(Destination, Fill, Length);
 464 }
 465
 466 /******************************************************************************
 467  *  RtlZeroMemory   [NTDLL.@]
 468  *
 469  * Set a block of memory with 0's.
 470  *
 471  * PARAMS
 472  *  Destination [O] Block to fill
 473  *  Length      [I] Number of bytes to fill
 474  *
 475  * RETURNS
 476  *  Nothing.
 477  */
 478 #undef RtlZeroMemory
 479 VOID WINAPI RtlZeroMemory( VOID *Destination, SIZE_T Length )
 480 {
 481     memset(Destination, 0, Length);
 482 }
 483
 484 /******************************************************************************
 485  *  RtlCompareMemory   [NTDLL.@]
 486  *
 487  * Compare one block of memory with another
 488  *
 489  * PARAMS
 490  *  Source1 [I] Source block
 491  *  Source2 [I] Block to compare to Source1
 492  *  Length  [I] Number of bytes to compare
 493  *
 494  * RETURNS
 495  *  The length of the first byte at which Source1 and Source2 differ, or Length
 496  *  if they are the same.
 497  */
 498 SIZE_T WINAPI RtlCompareMemory( const VOID *Source1, const VOID *Source2, SIZE_T Length)
 499 {
 500     SIZE_T i;
 501     for(i=0; (i<Length) && (((const BYTE*)Source1)[i]==((const BYTE*)Source2)[i]); i++);
 502     return i;
 503 }
 504
 505 /******************************************************************************
 506  *  RtlCompareMemoryUlong   [NTDLL.@]
 507  *
 508  * Compare a block of memory with a value, a ULONG at a time
 509  *
 510  * PARAMS
 511  *  Source1 [I] Source block. This must be ULONG aligned
 512  *  Length  [I] Number of bytes to compare. This should be a multiple of 4
 513  *  dwVal   [I] Value to compare to
 514  *
 515  * RETURNS
 516  *  The byte position of the first byte at which Source1 is not dwVal.
 517  */
 518 SIZE_T WINAPI RtlCompareMemoryUlong(const ULONG *Source1, SIZE_T Length, ULONG dwVal)
 519 {
 520     SIZE_T i;
 521     for(i = 0; i < Length/sizeof(ULONG) && Source1[i] == dwVal; i++);
 522     return i * sizeof(ULONG);
 523 }
 524
 525 /******************************************************************************
 526  *  RtlAssert                           [NTDLL.@]
 527  *
 528  * Fail a debug assertion.
 529  *
 530  * RETURNS
 531  *  Nothing. This call does not return control to its caller.
 532  *
 533  * NOTES
 534  * Not implemented in non-debug versions.
 535  */
 536 void WINAPI RtlAssert(LPVOID x1,LPVOID x2,DWORD x3, DWORD x4)
 537 {
 538         FIXME("(%p,%p,0x%08lx,0x%08lx),stub\n",x1,x2,x3,x4);
 539 }
 540
 541 /*************************************************************************
 542  * RtlFillMemoryUlong   [NTDLL.@]
 543  *
 544  * Fill memory with a 32 bit (dword) value.
 545  *
 546  * PARAMS
 547  *  lpDest  [I] Bitmap pointer
 548  *  ulCount [I] Number of dwords to write
 549  *  ulValue [I] Value to fill with
 550  *
 551  * RETURNS
 552  *  Nothing.
 553  */
 554 VOID WINAPI RtlFillMemoryUlong(ULONG* lpDest, ULONG ulCount, ULONG ulValue)
 555 {
 556   TRACE("(%p,%ld,%ld)\n", lpDest, ulCount, ulValue);
 557
 558   ulCount /= sizeof(ULONG);
 559   while(ulCount--)
 560     *lpDest++ = ulValue;
 561 }
 562
 563 /*********************************************************************
 564  *                  RtlComputeCrc32   [NTDLL.@]
 565  *
 566  * Calculate the CRC32 checksum of a block of bytes
 567  *
 568  * PARAMS
 569  *  dwInitial [I] Initial CRC value
 570  *  pData     [I] Data block
 571  *  iLen      [I] Length of the byte block
 572  *
 573  * RETURNS
 574  *  The cumulative CRC32 of dwInitial and iLen bytes of the pData block.
 575  */
 576 DWORD WINAPI RtlComputeCrc32(DWORD dwInitial, PBYTE pData, INT iLen)
 577 {
 578   DWORD crc = ~dwInitial;
 579
 580   TRACE("(%ld,%p,%d)\n", dwInitial, pData, iLen);
 581
 582   while (iLen > 0)
 583   {
 584     crc = CRC_table[(crc ^ *pData) & 0xff] ^ (crc >> 8);
 585     pData++;
 586     iLen--;
 587   }
 588   return ~crc;
 589 }
 590
 591
 592 /*************************************************************************
 593  * RtlUlonglongByteSwap    [NTDLL.@]
 594  *
 595  * Swap the bytes of an unsigned long long value.
 596  *
 597  * PARAMS
 598  *  i [I] Value to swap bytes of
 599  *
 600  * RETURNS
 601  *  The value with its bytes swapped.
 602  */
 603 ULONGLONG __cdecl RtlUlonglongByteSwap(ULONGLONG i)
 604 {
 605   return ((ULONGLONG)RtlUlongByteSwap(i) << 32) | RtlUlongByteSwap(i>>32);
 606 }
 607
 608 /*************************************************************************
 609  * RtlUlongByteSwap    [NTDLL.@]
 610  *
 611  * Swap the bytes of an unsigned int value.
 612  *
 613  * NOTES
 614  *  ix86 version takes argument in %ecx. Other systems use the inline version.
 615  */
 616 #ifdef __i386__
 617 __ASM_GLOBAL_FUNC(NTDLL_RtlUlongByteSwap,
 618                   "movl %ecx,%eax\n\t"
 619                   "bswap %eax\n\t"
 620                   "ret");
 621 #endif
 622
 623 /*************************************************************************
 624  * RtlUshortByteSwap    [NTDLL.@]
 625  *
 626  * Swap the bytes of an unsigned short value.
 627  *
 628  * NOTES
 629  *  i386 version takes argument in %cx. Other systems use the inline version.
 630  */
 631 #ifdef __i386__
 632 __ASM_GLOBAL_FUNC(NTDLL_RtlUshortByteSwap,
 633                   "movb %ch,%al\n\t"
 634                   "movb %cl,%ah\n\t"
 635                   "ret");
 636 #endif
 637
 638
 639 /*************************************************************************
 640  * RtlUniform   [NTDLL.@]
 641  *
 642  * Generates an uniform random number
 643  *
 644  * PARAMS
 645  *  seed [O] The seed of the Random function
 646  *
 647  * RETURNS
 648  *  It returns a random number uniformly distributed over [0..MAXLONG-1].
 649  *
 650  * NOTES
 651  *  Generates an uniform random number using D.H. Lehmer's 1948 algorithm.
 652  *  In our case the algorithm is:
 653  *
 654  *|  result = (*seed * 0x7fffffed + 0x7fffffc3) % MAXLONG;
 655  *|
 656  *|  *seed = result;
 657  *
 658  * DIFFERENCES
 659  *  The native documentation states that the random number is
 660  *  uniformly distributed over [0..MAXLONG]. In reality the native
 661  *  function and our function return a random number uniformly
 662  *  distributed over [0..MAXLONG-1].
 663  */
 664 ULONG WINAPI RtlUniform (PULONG seed)
 665 {
 666     ULONG result;
 667
 668    /*
 669     * Instead of the algorithm stated above, we use the algorithm
 670     * below, which is totally equivalent (see the tests), but does
 671     * not use a division and therefore is faster.
 672     */
 673     result = *seed * 0xffffffed + 0x7fffffc3;
 674     if (result == 0xffffffff || result == 0x7ffffffe) {
 675         result = (result + 2) & MAXLONG;
 676     } else if (result == 0x7fffffff) {
 677         result = 0;
 678     } else if ((result & 0x80000000) == 0) {
 679         result = result + (~result & 1);
 680     } else {
 681         result = (result + (result & 1)) & MAXLONG;
 682     } /* if */
 683     *seed = result;
 684     return result;
 685 }
 686
 687
 688 /*************************************************************************
 689  * RtlRandom   [NTDLL.@]
 690  *
 691  * Generates a random number
 692  *
 693  * PARAMS
 694  *  seed [O] The seed of the Random function
 695  *
 696  * RETURNS
 697  *  It returns a random number distributed over [0..MAXLONG-1].
 698  */
 699 ULONG WINAPI RtlRandom (PULONG seed)
 700 {
 701     static ULONG saved_value[128] =
 702     { /*   0 */ 0x4c8bc0aa, 0x4c022957, 0x2232827a, 0x2f1e7626, 0x7f8bdafb, 0x5c37d02a, 0x0ab48f72, 0x2f0c4ffa,
 703       /*   8 */ 0x290e1954, 0x6b635f23, 0x5d3885c0, 0x74b49ff8, 0x5155fa54, 0x6214ad3f, 0x111e9c29, 0x242a3a09,
 704       /*  16 */ 0x75932ae1, 0x40ac432e, 0x54f7ba7a, 0x585ccbd5, 0x6df5c727, 0x0374dad1, 0x7112b3f1, 0x735fc311,
 705       /*  24 */ 0x404331a9, 0x74d97781, 0x64495118, 0x323e04be, 0x5974b425, 0x4862e393, 0x62389c1d, 0x28a68b82,
 706       /*  32 */ 0x0f95da37, 0x7a50bbc6, 0x09b0091c, 0x22cdb7b4, 0x4faaed26, 0x66417ccd, 0x189e4bfa, 0x1ce4e8dd,
 707       /*  40 */ 0x5274c742, 0x3bdcf4dc, 0x2d94e907, 0x32eac016, 0x26d33ca3, 0x60415a8a, 0x31f57880, 0x68c8aa52,
 708       /*  48 */ 0x23eb16da, 0x6204f4a1, 0x373927c1, 0x0d24eb7c, 0x06dd7379, 0x2b3be507, 0x0f9c55b1, 0x2c7925eb,
 709       /*  56 */ 0x36d67c9a, 0x42f831d9, 0x5e3961cb, 0x65d637a8, 0x24bb3820, 0x4d08e33d, 0x2188754f, 0x147e409e,
 710       /*  64 */ 0x6a9620a0, 0x62e26657, 0x7bd8ce81, 0x11da0abb, 0x5f9e7b50, 0x23e444b6, 0x25920c78, 0x5fc894f0,
 711       /*  72 */ 0x5e338cbb, 0x404237fd, 0x1d60f80f, 0x320a1743, 0x76013d2b, 0x070294ee, 0x695e243b, 0x56b177fd,
 712       /*  80 */ 0x752492e1, 0x6decd52f, 0x125f5219, 0x139d2e78, 0x1898d11e, 0x2f7ee785, 0x4db405d8, 0x1a028a35,
 713       /*  88 */ 0x63f6f323, 0x1f6d0078, 0x307cfd67, 0x3f32a78a, 0x6980796c, 0x462b3d83, 0x34b639f2, 0x53fce379,
 714       /*  96 */ 0x74ba50f4, 0x1abc2c4b, 0x5eeaeb8d, 0x335a7a0d, 0x3973dd20, 0x0462d66b, 0x159813ff, 0x1e4643fd,
 715       /* 104 */ 0x06bc5c62, 0x3115e3fc, 0x09101613, 0x47af2515, 0x4f11ec54, 0x78b99911, 0x3db8dd44, 0x1ec10b9b,
 716       /* 112 */ 0x5b5506ca, 0x773ce092, 0x567be81a, 0x5475b975, 0x7a2cde1a, 0x494536f5, 0x34737bb4, 0x76d9750b,
 717       /* 120 */ 0x2a1f6232, 0x2e49644d, 0x7dddcbe7, 0x500cebdb, 0x619dab9e, 0x48c626fe, 0x1cda3193, 0x52dabe9d };
 718     ULONG rand;
 719     int pos;
 720     ULONG result;
 721
 722     rand = (*seed * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 723     *seed = (rand * 0x7fffffed + 0x7fffffc3) % 0x7fffffff;
 724     pos = *seed & 0x7f;
 725     result = saved_value[pos];
 726     saved_value[pos] = rand;
 727     return(result);
 728 }
 729
 730
 731 /*************************************************************************
 732  * RtlAreAllAccessesGranted   [NTDLL.@]
 733  *
 734  * Check if all desired accesses are granted
 735  *
 736  * RETURNS
 737  *  TRUE: All desired accesses are granted
 738  *  FALSE: Otherwise
 739  */
 740 BOOLEAN WINAPI RtlAreAllAccessesGranted(
 741     ACCESS_MASK GrantedAccess,
 742     ACCESS_MASK DesiredAccess)
 743 {
 744     return (GrantedAccess & DesiredAccess) == DesiredAccess;
 745 }
 746
 747
 748 /*************************************************************************
 749  * RtlAreAnyAccessesGranted   [NTDLL.@]
 750  *
 751  * Check if at least one of the desired accesses is granted
 752  *
 753  * PARAMS
 754  *  GrantedAccess [I] Access mask of granted accesses
 755  *  DesiredAccess [I] Access mask of desired accesses
 756  *
 757  * RETURNS
 758  *  TRUE: At least one of the desired accesses is granted
 759  *  FALSE: Otherwise
 760  */
 761 BOOLEAN WINAPI RtlAreAnyAccessesGranted(
 762     ACCESS_MASK GrantedAccess,
 763     ACCESS_MASK DesiredAccess)
 764 {
 765     return (GrantedAccess & DesiredAccess) != 0;
 766 }
 767
 768
 769 /*************************************************************************
 770  * RtlMapGenericMask   [NTDLL.@]
 771  *
 772  * Determine the nongeneric access rights specified by an access mask
 773  *
 774  * RETURNS
 775  *  Nothing.
 776  */
 777 void WINAPI RtlMapGenericMask(
 778     PACCESS_MASK AccessMask,
 779     const GENERIC_MAPPING *GenericMapping)
 780 {
 781     if (*AccessMask & GENERIC_READ) {
 782         *AccessMask |= GenericMapping->GenericRead;
 783     } /* if */
 784
 785     if (*AccessMask & GENERIC_WRITE) {
 786         *AccessMask |= GenericMapping->GenericWrite;
 787     } /* if */
 788
 789     if (*AccessMask & GENERIC_EXECUTE) {
 790         *AccessMask |= GenericMapping->GenericExecute;
 791     } /* if */
 792
 793     if (*AccessMask & GENERIC_ALL) {
 794         *AccessMask |= GenericMapping->GenericAll;
 795     } /* if */
 796
 797     *AccessMask &= 0x0FFFFFFF;
 798 }
 799
 800
 801 /*************************************************************************
 802  * RtlCopyLuid   [NTDLL.@]
 803  *
 804  * Copy a local unique ID.
 805  *
 806  * PARAMS
 807  *  LuidDest [O] Destination for the copied Luid
 808  *  LuidSrc  [I] Source Luid to copy to LuidDest
 809  *
 810  * RETURNS
 811  *  Nothing.
 812  */
 813 void WINAPI RtlCopyLuid (PLUID LuidDest, const LUID *LuidSrc)
 814 {
 815     *LuidDest = *LuidSrc;
 816 }
 817
 818
 819 /*************************************************************************
 820  * RtlEqualLuid   [NTDLL.@]
 821  *
 822  * Compare two local unique ID's.
 823  *
 824  * PARAMS
 825  *  Luid1 [I] First Luid to compare to Luid2
 826  *  Luid2 [I] Second Luid to compare to Luid1
 827  *
 828  * RETURNS
 829  *  TRUE: The two LUID's are equal.
 830  *  FALSE: Otherwise
 831  */
 832 BOOLEAN WINAPI RtlEqualLuid (const LUID *Luid1, const LUID *Luid2)
 833 {
 834   return (Luid1->LowPart ==  Luid2->LowPart && Luid1->HighPart == Luid2->HighPart);
 835 }
 836
 837
 838 /*************************************************************************
 839  * RtlCopyLuidAndAttributesArray   [NTDLL.@]
 840  *
 841  * Copy an array of local unique ID's and attributes.
 842  *
 843  * PARAMS
 844  *  Count [I] Number of Luid/attributes in Src
 845  *  Src   [I] Source Luid/attributes to copy
 846  *  Dest  [O] Destination for copied Luid/attributes
 847  *
 848  * RETURNS
 849  *  Nothing.
 850  *
 851  * NOTES
 852  *  Dest must be large enough to hold Src.
 853  */
 854 void WINAPI RtlCopyLuidAndAttributesArray(
 855     ULONG Count,
 856     const LUID_AND_ATTRIBUTES *Src,
 857     PLUID_AND_ATTRIBUTES Dest)
 858 {
 859     ULONG i;
 860
 861     for (i = 0; i < Count; i++) Dest[i] = Src[i];
 862 }