dlls/ntdll/rtlstr.c

   1 /*
   2  * Rtl string functions
   3  *
   4  * Copyright (C) 1996-1998 Marcus Meissner
   5  * Copyright (C) 2000      Alexandre Julliard
   6  * Copyright (C) 2003      Thomas Mertes
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "config.h"
  24
  25 #include <assert.h>
  26 #include <stdarg.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "winreg.h"
  33 #include "winternl.h"
  34 #include "wine/unicode.h"
  35 #include "wine/debug.h"
  36 #include "ntdll_misc.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  39
  40 #define GUID_STRING_LENGTH    38
  41
  42 UINT NlsAnsiCodePage = 0;
  43 BYTE NlsMbCodePageTag = 0;
  44 BYTE NlsMbOemCodePageTag = 0;
  45
  46 static const union cptable *ansi_table;
  47 static const union cptable *oem_table;
  48 static const union cptable* unix_table; /* NULL if UTF8 */
  49
  50
  51 /**************************************************************************
  52  *      __wine_init_codepages   (NTDLL.@)
  53  *
  54  * Set the code page once kernel32 is loaded. Should be done differently.
  55  */
  56 void __wine_init_codepages( const union cptable *ansi, const union cptable *oem,
  57                             const union cptable *ucp)
  58 {
  59     ansi_table = ansi;
  60     oem_table = oem;
  61     unix_table = ucp;
  62     NlsAnsiCodePage = ansi->info.codepage;
  63 }
  64
  65 int ntdll_umbstowcs(DWORD flags, const char* src, int srclen, WCHAR* dst, int dstlen)
  66 {
  67     return (unix_table) ?
  68         wine_cp_mbstowcs( unix_table, flags, src, srclen, dst, dstlen ) :
  69         wine_utf8_mbstowcs( flags, src, srclen, dst, dstlen );
  70 }
  71
  72 int ntdll_wcstoumbs(DWORD flags, const WCHAR* src, int srclen, char* dst, int dstlen,
  73                     const char* defchar, int *used )
  74 {
  75     if (unix_table)
  76         return wine_cp_wcstombs( unix_table, flags, src, srclen, dst, dstlen, defchar, used );
  77     if (used) *used = 0;  /* all chars are valid for UTF-8 */
  78     return wine_utf8_wcstombs( src, srclen, dst, dstlen );
  79 }
  80
  81 /**************************************************************************
  82  *      RtlInitAnsiString   (NTDLL.@)
  83  *
  84  * Initializes a buffered ansi string.
  85  *
  86  * RETURNS
  87  *  Nothing.
  88  *
  89  * NOTES
  90  *  Assigns source to target->Buffer. The length of source is assigned to
  91  *  target->Length and target->MaximumLength. If source is NULL the length
  92  *  of source is assumed to be 0.
  93  */
  94 void WINAPI RtlInitAnsiString(
  95     PANSI_STRING target, /* [I/O] Buffered ansi string to be initialized */
  96     PCSZ source)         /* [I]   '\0' terminated string used to initialize target */
  97 {
  98     if ((target->Buffer = (PCHAR) source))
  99     {
 100         target->Length = strlen(source);
 101         target->MaximumLength = target->Length + 1;
 102     }
 103     else target->Length = target->MaximumLength = 0;
 104 }
 105
 106
 107 /**************************************************************************
 108  *      RtlInitString   (NTDLL.@)
 109  *
 110  * Initializes a buffered string.
 111  *
 112  * RETURNS
 113  *  Nothing.
 114  *
 115  * NOTES
 116  *  Assigns source to target->Buffer. The length of source is assigned to
 117  *  target->Length and target->MaximumLength. If source is NULL the length
 118  *  of source is assumed to be 0.
 119  */
 120 void WINAPI RtlInitString(
 121     PSTRING target, /* [I/O] Buffered string to be initialized */
 122     PCSZ source)    /* [I]   '\0' terminated string used to initialize target */
 123 {
 124     RtlInitAnsiString( target, source );
 125 }
 126
 127
 128 /**************************************************************************
 129  *      RtlFreeAnsiString   (NTDLL.@)
 130  */
 131 void WINAPI RtlFreeAnsiString( PSTRING str )
 132 {
 133     if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
 134 }
 135
 136
 137 /**************************************************************************
 138  *      RtlFreeOemString   (NTDLL.@)
 139  */
 140 void WINAPI RtlFreeOemString( PSTRING str )
 141 {
 142     RtlFreeAnsiString( str );
 143 }
 144
 145
 146 /**************************************************************************
 147  *      RtlCopyString   (NTDLL.@)
 148  */
 149 void WINAPI RtlCopyString( STRING *dst, const STRING *src )
 150 {
 151     if (src)
 152     {
 153         unsigned int len = min( src->Length, dst->MaximumLength );
 154         memcpy( dst->Buffer, src->Buffer, len );
 155         dst->Length = len;
 156     }
 157     else dst->Length = 0;
 158 }
 159
 160
 161 /**************************************************************************
 162  *      RtlInitUnicodeString   (NTDLL.@)
 163  *
 164  * Initializes a buffered unicode string.
 165  *
 166  * RETURNS
 167  *  Nothing.
 168  *
 169  * NOTES
 170  *  Assigns source to target->Buffer. The length of source is assigned to
 171  *  target->Length and target->MaximumLength. If source is NULL the length
 172  *  of source is assumed to be 0.
 173  */
 174 void WINAPI RtlInitUnicodeString(
 175     PUNICODE_STRING target, /* [I/O] Buffered unicode string to be initialized */
 176     PCWSTR source)          /* [I]   '\0' terminated unicode string used to initialize target */
 177 {
 178     if ((target->Buffer = (PWSTR) source))
 179     {
 180         target->Length = strlenW(source) * sizeof(WCHAR);
 181         target->MaximumLength = target->Length + sizeof(WCHAR);
 182     }
 183     else target->Length = target->MaximumLength = 0;
 184 }
 185
 186
 187 /**************************************************************************
 188  *      RtlInitUnicodeStringEx   (NTDLL.@)
 189  *
 190  * Initializes a buffered unicode string.
 191  *
 192  * RETURNS
 193  *  Success: STATUS_SUCCESS. target is initialized.
 194  *  Failure: STATUS_NAME_TOO_LONG, if the source string is larger than 65532 bytes.
 195  *
 196  * NOTES
 197  *  Assigns source to target->Buffer. The length of source is assigned to
 198  *  target->Length and target->MaximumLength. If source is NULL the length
 199  *  of source is assumed to be 0.
 200  */
 201 NTSTATUS WINAPI RtlInitUnicodeStringEx(
 202     PUNICODE_STRING target, /* [I/O] Buffered unicode string to be initialized */
 203     PCWSTR source)          /* [I]   '\0' terminated unicode string used to initialize target */
 204 {
 205     if (source != NULL) {
 206         unsigned int len = strlenW(source) * sizeof(WCHAR);
 207
 208         if (len > 0xFFFC) {
 209             return STATUS_NAME_TOO_LONG;
 210         } else {
 211             target->Length = len;
 212             target->MaximumLength = len + sizeof(WCHAR);
 213             target->Buffer = (PWSTR) source;
 214         } /* if */
 215     } else {
 216         target->Length = 0;
 217         target->MaximumLength = 0;
 218         target->Buffer = NULL;
 219     } /* if */
 220     return STATUS_SUCCESS;
 221 }
 222
 223
 224 /**************************************************************************
 225  *      RtlCreateUnicodeString   (NTDLL.@)
 226  *
 227  * Creates a UNICODE_STRING from a null-terminated Unicode string.
 228  *
 229  * RETURNS
 230  *     Success: TRUE
 231  *     Failure: FALSE
 232  */
 233 BOOLEAN WINAPI RtlCreateUnicodeString( PUNICODE_STRING target, LPCWSTR src )
 234 {
 235     int len = (strlenW(src) + 1) * sizeof(WCHAR);
 236     if (!(target->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return FALSE;
 237     memcpy( target->Buffer, src, len );
 238     target->MaximumLength = len;
 239     target->Length = len - sizeof(WCHAR);
 240     return TRUE;
 241 }
 242
 243
 244 /**************************************************************************
 245  *      RtlCreateUnicodeStringFromAsciiz   (NTDLL.@)
 246  *
 247  * Creates a UNICODE_STRING from a null-terminated Ascii string.
 248  *
 249  * RETURNS
 250  *     Success: TRUE
 251  *     Failure: FALSE
 252  */
 253 BOOLEAN WINAPI RtlCreateUnicodeStringFromAsciiz( PUNICODE_STRING target, LPCSTR src )
 254 {
 255     STRING ansi;
 256     RtlInitAnsiString( &ansi, src );
 257     return !RtlAnsiStringToUnicodeString( target, &ansi, TRUE );
 258 }
 259
 260
 261 /**************************************************************************
 262  *      RtlFreeUnicodeString   (NTDLL.@)
 263  *
 264  * Frees a UNICODE_STRING created with RtlCreateUnicodeString() or
 265  * RtlCreateUnicodeStringFromAsciiz().
 266  *
 267  * RETURNS
 268  *     nothing
 269  */
 270 void WINAPI RtlFreeUnicodeString( PUNICODE_STRING str )
 271 {
 272     if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
 273 }
 274
 275
 276 /**************************************************************************
 277  *      RtlCopyUnicodeString   (NTDLL.@)
 278  *
 279  * Copies from one UNICODE_STRING to another.
 280  *
 281  * RETURNS
 282  *     nothing
 283  */
 284 void WINAPI RtlCopyUnicodeString( UNICODE_STRING *dst, const UNICODE_STRING *src )
 285 {
 286     if (src)
 287     {
 288         unsigned int len = min( src->Length, dst->MaximumLength );
 289         memcpy( dst->Buffer, src->Buffer, len );
 290         dst->Length = len;
 291         /* append terminating '\0' if enough space */
 292         if (len < dst->MaximumLength) dst->Buffer[len / sizeof(WCHAR)] = 0;
 293     }
 294     else dst->Length = 0;
 295 }
 296
 297
 298 /**************************************************************************
 299  *      RtlDuplicateUnicodeString   (NTDLL.@)
 300  *
 301  * Duplicates an unicode string.
 302  *
 303  * RETURNS
 304  *  Success: STATUS_SUCCESS. destination contains the duplicated unicode string.
 305  *  Failure: STATUS_INVALID_PARAMETER, if one of the parameters is illegal.
 306  *           STATUS_NO_MEMORY, if the allocation fails.
 307  *
 308  * NOTES
 309  *  For add_nul there are several possible values:
 310  *  0 = destination will not be '\0' terminated,
 311  *  1 = destination will be '\0' terminated,
 312  *  3 = like 1 but for an empty source string produce '\0' terminated empty
 313  *     Buffer instead of assigning NULL to the Buffer.
 314  *  Other add_nul values are invalid.
 315  */
 316 NTSTATUS WINAPI RtlDuplicateUnicodeString(
 317     int add_nul,                  /* [I] flag */
 318     const UNICODE_STRING *source, /* [I] Unicode string to be duplicated */
 319     UNICODE_STRING *destination)  /* [O] destination for the duplicated unicode string */
 320 {
 321     if (source == NULL || destination == NULL ||
 322         source->Length > source->MaximumLength ||
 323         (source->Length == 0 && source->MaximumLength > 0 && source->Buffer == NULL) ||
 324         add_nul == 2 || add_nul >= 4 || add_nul < 0) {
 325         return STATUS_INVALID_PARAMETER;
 326     } else {
 327         if (source->Length == 0 && add_nul != 3) {
 328             destination->Length = 0;
 329             destination->MaximumLength = 0;
 330             destination->Buffer = NULL;
 331         } else {
 332             unsigned int destination_max_len = source->Length;
 333
 334             if (add_nul) {
 335                 destination_max_len += sizeof(WCHAR);
 336             } /* if */
 337             destination->Buffer = RtlAllocateHeap(GetProcessHeap(), 0, destination_max_len);
 338             if (destination->Buffer == NULL) {
 339                 return STATUS_NO_MEMORY;
 340             } else {
 341                 memcpy(destination->Buffer, source->Buffer, source->Length);
 342                 destination->Length = source->Length;
 343                 destination->MaximumLength = source->Length;
 344                 /* append terminating '\0' if enough space */
 345                 if (add_nul) {
 346                     destination->MaximumLength = destination_max_len;
 347                     destination->Buffer[destination->Length / sizeof(WCHAR)] = 0;
 348                 } /* if */
 349             } /* if */
 350         } /* if */
 351     } /* if */
 352     return STATUS_SUCCESS;
 353 }
 354
 355
 356 /**************************************************************************
 357  *      RtlEraseUnicodeString   (NTDLL.@)
 358  *
 359  * Overwrites a UNICODE_STRING with zeros.
 360  *
 361  * RETURNS
 362  *     nothing
 363  */
 364 void WINAPI RtlEraseUnicodeString( UNICODE_STRING *str )
 365 {
 366     if (str->Buffer)
 367     {
 368         memset( str->Buffer, 0, str->MaximumLength );
 369         str->Length = 0;
 370     }
 371 }
 372
 373
 374 /*
 375     COMPARISON FUNCTIONS
 376 */
 377
 378
 379 /******************************************************************************
 380  *      RtlCompareString   (NTDLL.@)
 381  */
 382 LONG WINAPI RtlCompareString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
 383 {
 384     unsigned int len;
 385     LONG ret = 0;
 386     LPCSTR p1, p2;
 387
 388     len = min(s1->Length, s2->Length);
 389     p1 = s1->Buffer;
 390     p2 = s2->Buffer;
 391
 392     if (CaseInsensitive)
 393     {
 394         while (!ret && len--) ret = RtlUpperChar(*p1++) - RtlUpperChar(*p2++);
 395     }
 396     else
 397     {
 398         while (!ret && len--) ret = *p1++ - *p2++;
 399     }
 400     if (!ret) ret = s1->Length - s2->Length;
 401     return ret;
 402 }
 403
 404
 405 /******************************************************************************
 406  *      RtlCompareUnicodeString   (NTDLL.@)
 407  */
 408 LONG WINAPI RtlCompareUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
 409                                      BOOLEAN CaseInsensitive )
 410 {
 411     unsigned int len;
 412     LONG ret = 0;
 413     LPCWSTR p1, p2;
 414
 415     len = min(s1->Length, s2->Length) / sizeof(WCHAR);
 416     p1 = s1->Buffer;
 417     p2 = s2->Buffer;
 418
 419     if (CaseInsensitive)
 420     {
 421         while (!ret && len--) ret = toupperW(*p1++) - toupperW(*p2++);
 422     }
 423     else
 424     {
 425         while (!ret && len--) ret = *p1++ - *p2++;
 426     }
 427     if (!ret) ret = s1->Length - s2->Length;
 428     return ret;
 429 }
 430
 431
 432 /**************************************************************************
 433  *      RtlEqualString   (NTDLL.@)
 434  *
 435  * Determine if two strings are equal.
 436  *
 437  * PARAMS
 438  *  s1              [I] Source string
 439  *  s2              [I] String to compare to s1
 440  *  CaseInsensitive [I] TRUE = Case insensitive, FALSE = Case sensitive
 441  *
 442  * RETURNS
 443  *  Non-zero if s1 is equal to s2, 0 otherwise.
 444  */
 445 BOOLEAN WINAPI RtlEqualString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
 446 {
 447     if (s1->Length != s2->Length) return FALSE;
 448     return !RtlCompareString( s1, s2, CaseInsensitive );
 449 }
 450
 451
 452 /**************************************************************************
 453  *      RtlEqualUnicodeString   (NTDLL.@)
 454  *
 455  * Unicode version of RtlEqualString.
 456  */
 457 BOOLEAN WINAPI RtlEqualUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
 458                                       BOOLEAN CaseInsensitive )
 459 {
 460     if (s1->Length != s2->Length) return FALSE;
 461     return !RtlCompareUnicodeString( s1, s2, CaseInsensitive );
 462 }
 463
 464
 465 /**************************************************************************
 466  *      RtlPrefixString   (NTDLL.@)
 467  *
 468  * Determine if one string is a prefix of another.
 469  *
 470  * PARAMS
 471  *  s1          [I] Prefix to look for in s2
 472  *  s2          [I] String that may contain s1 as a prefix
 473  *  ignore_case [I] TRUE = Case insensitive, FALSE = Case sensitive
 474  *
 475  * RETURNS
 476  *  TRUE if s2 contains s1 as a prefix, FALSE otherwise.
 477  */
 478 BOOLEAN WINAPI RtlPrefixString( const STRING *s1, const STRING *s2, BOOLEAN ignore_case )
 479 {
 480     unsigned int i;
 481
 482     if (s1->Length > s2->Length) return FALSE;
 483     if (ignore_case)
 484     {
 485         for (i = 0; i < s1->Length; i++)
 486             if (RtlUpperChar(s1->Buffer[i]) != RtlUpperChar(s2->Buffer[i])) return FALSE;
 487     }
 488     else
 489     {
 490         for (i = 0; i < s1->Length; i++)
 491             if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
 492     }
 493     return TRUE;
 494 }
 495
 496
 497 /**************************************************************************
 498  *      RtlPrefixUnicodeString   (NTDLL.@)
 499  *
 500  * Unicode version of RtlPrefixString.
 501  */
 502 BOOLEAN WINAPI RtlPrefixUnicodeString( const UNICODE_STRING *s1,
 503                                        const UNICODE_STRING *s2,
 504                                        BOOLEAN ignore_case )
 505 {
 506     unsigned int i;
 507
 508     if (s1->Length > s2->Length) return FALSE;
 509     if (ignore_case)
 510     {
 511         for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
 512             if (toupperW(s1->Buffer[i]) != toupperW(s2->Buffer[i])) return FALSE;
 513     }
 514     else
 515     {
 516         for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
 517             if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
 518     }
 519     return TRUE;
 520 }
 521
 522
 523 /**************************************************************************
 524  *      RtlEqualComputerName   (NTDLL.@)
 525  *
 526  * Determine if two computer names are the same.
 527  *
 528  * PARAMS
 529  *  left  [I] First computer name
 530  *  right [I] Second computer name
 531  *
 532  * RETURNS
 533  *  0 if the names are equal, non-zero otherwise.
 534  *
 535  * NOTES
 536  *  The comparison is case insensitive.
 537  */
 538 NTSTATUS WINAPI RtlEqualComputerName(const UNICODE_STRING *left,
 539                                      const UNICODE_STRING *right)
 540 {
 541     NTSTATUS ret;
 542     STRING upLeft, upRight;
 543
 544     if (!(ret = RtlUpcaseUnicodeStringToOemString( &upLeft, left, TRUE )))
 545     {
 546        if (!(ret = RtlUpcaseUnicodeStringToOemString( &upRight, right, TRUE )))
 547        {
 548          ret = RtlEqualString( &upLeft, &upRight, FALSE );
 549          RtlFreeOemString( &upRight );
 550        }
 551        RtlFreeOemString( &upLeft );
 552     }
 553     return ret;
 554 }
 555
 556
 557 /**************************************************************************
 558  *      RtlEqualDomainName   (NTDLL.@)
 559  *
 560  * Determine if two domain names are the same.
 561  *
 562  * PARAMS
 563  *  left  [I] First domain name
 564  *  right [I] Second domain name
 565  *
 566  * RETURNS
 567  *  0 if the names are equal, non-zero otherwise.
 568  *
 569  * NOTES
 570  *  The comparison is case insensitive.
 571  */
 572 NTSTATUS WINAPI RtlEqualDomainName(const UNICODE_STRING *left,
 573                                    const UNICODE_STRING *right)
 574 {
 575     return RtlEqualComputerName(left, right);
 576 }
 577
 578
 579 /*
 580         COPY BETWEEN ANSI_STRING or UNICODE_STRING
 581         there is no parameter checking, it just crashes
 582 */
 583
 584
 585 /**************************************************************************
 586  *      RtlAnsiStringToUnicodeString   (NTDLL.@)
 587  *
 588  * Converts an ansi string to an unicode string.
 589  *
 590  * RETURNS
 591  *  Success: STATUS_SUCCESS. uni contains the converted string
 592  *  Failure: STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and ansi is too small.
 593  *           STATUS_NO_MEMORY, if doalloc is TRUE and the allocation fails.
 594  *           STATUS_INVALID_PARAMETER_2, if the unicode string would be larger than 65535.
 595  *
 596  * NOTES
 597  *  This function always writes a terminating '\0'.
 598  */
 599 NTSTATUS WINAPI RtlAnsiStringToUnicodeString(
 600     PUNICODE_STRING uni, /* [I/O] Destination for the unicode string */
 601     PCANSI_STRING ansi,  /* [I]   Ansi string to be converted */
 602     BOOLEAN doalloc)     /* [I]   TRUE=Allocate new buffer for uni, FALSE=Use existing buffer */
 603 {
 604     DWORD total = RtlAnsiStringToUnicodeSize( ansi );
 605
 606     if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
 607     uni->Length = total - sizeof(WCHAR);
 608     if (doalloc)
 609     {
 610         uni->MaximumLength = total;
 611         if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total )))
 612             return STATUS_NO_MEMORY;
 613     }
 614     else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 615
 616     RtlMultiByteToUnicodeN( uni->Buffer, uni->Length, NULL, ansi->Buffer, ansi->Length );
 617     uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
 618     return STATUS_SUCCESS;
 619 }
 620
 621
 622 /**************************************************************************
 623  *      RtlOemStringToUnicodeString   (NTDLL.@)
 624  *
 625  * Converts an oem string to an unicode string.
 626  *
 627  * RETURNS
 628  *  Success: STATUS_SUCCESS. uni contains the converted string
 629  *  Failure: STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and oem is too small.
 630  *           STATUS_NO_MEMORY, if doalloc is TRUE and the allocation fails.
 631  *           STATUS_INVALID_PARAMETER_2, if the unicode string would be larger than 65535.
 632  *
 633  * NOTES
 634  *  This function always writes a terminating '\0'.
 635  */
 636 NTSTATUS WINAPI RtlOemStringToUnicodeString(
 637     UNICODE_STRING *uni, /* [I/O] Destination for the unicode string */
 638     const STRING *oem,   /* [I]   Oem string to be converted */
 639     BOOLEAN doalloc)     /* [I]   TRUE=Allocate new buffer for uni, FALSE=Use existing buffer */
 640 {
 641     DWORD total = RtlOemStringToUnicodeSize( oem );
 642
 643     if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
 644     uni->Length = total - sizeof(WCHAR);
 645     if (doalloc)
 646     {
 647         uni->MaximumLength = total;
 648         if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total )))
 649             return STATUS_NO_MEMORY;
 650     }
 651     else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 652
 653     RtlOemToUnicodeN( uni->Buffer, uni->Length, NULL, oem->Buffer, oem->Length );
 654     uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
 655     return STATUS_SUCCESS;
 656 }
 657
 658
 659 /**************************************************************************
 660  *      RtlUnicodeStringToAnsiString   (NTDLL.@)
 661  *
 662  * Converts an unicode string to an ansi string.
 663  *
 664  * RETURNS
 665  *  Success: STATUS_SUCCESS. ansi contains the converted string
 666  *  Failure: STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and ansi is too small.
 667  *           STATUS_NO_MEMORY, if doalloc is TRUE and the allocation fails.
 668  *
 669  * NOTES
 670  *  This function always writes a terminating '\0'.
 671  *  It performs a partial copy if ansi is too small.
 672  */
 673 NTSTATUS WINAPI RtlUnicodeStringToAnsiString(
 674     STRING *ansi,              /* [I/O] Destination for the ansi string */
 675     const UNICODE_STRING *uni, /* [I]   Unicode string to be converted */
 676     BOOLEAN doalloc)           /* [I]   TRUE=Allocate new buffer for ansi, FALSE=Use existing buffer */
 677 {
 678     NTSTATUS ret = STATUS_SUCCESS;
 679     DWORD len = RtlUnicodeStringToAnsiSize( uni );
 680
 681     ansi->Length = len - 1;
 682     if (doalloc)
 683     {
 684         ansi->MaximumLength = len;
 685         if (!(ansi->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len )))
 686             return STATUS_NO_MEMORY;
 687     }
 688     else if (ansi->MaximumLength < len)
 689     {
 690         if (!ansi->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 691         ansi->Length = ansi->MaximumLength - 1;
 692         ret = STATUS_BUFFER_OVERFLOW;
 693     }
 694
 695     RtlUnicodeToMultiByteN( ansi->Buffer, ansi->Length, NULL, uni->Buffer, uni->Length );
 696     ansi->Buffer[ansi->Length] = 0;
 697     return ret;
 698 }
 699
 700
 701 /**************************************************************************
 702  *      RtlUnicodeStringToOemString   (NTDLL.@)
 703  *
 704  * Converts a Rtl Unicode string to an OEM string.
 705  *
 706  * PARAMS
 707  *  oem     [O] Destination for OEM string
 708  *  uni     [I] Source Unicode string
 709  *  doalloc [I] TRUE=Allocate new buffer for oem,FALSE=Use existing buffer
 710  *
 711  * RETURNS
 712  *  Success: STATUS_SUCCESS. oem contains the converted string
 713  *  Failure: STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and oem is too small.
 714  *           STATUS_NO_MEMORY, if doalloc is TRUE and allocation fails.
 715  *
 716  * NOTES
 717  *   If doalloc is TRUE, the length allocated is uni->Length + 1.
 718  *   This function always '\0' terminates the string returned.
 719  */
 720 NTSTATUS WINAPI RtlUnicodeStringToOemString( STRING *oem,
 721                                              const UNICODE_STRING *uni,
 722                                              BOOLEAN doalloc )
 723 {
 724     NTSTATUS ret = STATUS_SUCCESS;
 725     DWORD len = RtlUnicodeStringToOemSize( uni );
 726
 727     oem->Length = len - 1;
 728     if (doalloc)
 729     {
 730         oem->MaximumLength = len;
 731         if (!(oem->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len )))
 732             return STATUS_NO_MEMORY;
 733     }
 734     else if (oem->MaximumLength < len)
 735     {
 736         if (!oem->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 737         oem->Length = oem->MaximumLength - 1;
 738         ret = STATUS_BUFFER_OVERFLOW;
 739     }
 740
 741     RtlUnicodeToOemN( oem->Buffer, oem->Length, NULL, uni->Buffer, uni->Length );
 742     oem->Buffer[oem->Length] = 0;
 743     return ret;
 744 }
 745
 746
 747 /**************************************************************************
 748  *      RtlMultiByteToUnicodeN   (NTDLL.@)
 749  *
 750  * Converts a multi-byte string to a Unicode string.
 751  *
 752  * RETURNS
 753  *  NTSTATUS code
 754  *
 755  * NOTES
 756  *  Performs a partial copy if dst is too small.
 757  */
 758 NTSTATUS WINAPI RtlMultiByteToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
 759                                         LPCSTR src, DWORD srclen )
 760 {
 761
 762     int ret = wine_cp_mbstowcs( ansi_table, 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
 763     if (reslen)
 764         *reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
 765     return STATUS_SUCCESS;
 766 }
 767
 768
 769 /**************************************************************************
 770  *      RtlOemToUnicodeN   (NTDLL.@)
 771  *
 772  * Converts a multi-byte string in the OEM code page to a Unicode string.
 773  *
 774  * RETURNS
 775  *  NTSTATUS code
 776  */
 777 NTSTATUS WINAPI RtlOemToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
 778                                   LPCSTR src, DWORD srclen )
 779 {
 780     int ret = wine_cp_mbstowcs( oem_table, 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
 781     if (reslen)
 782         *reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
 783     return STATUS_SUCCESS;
 784 }
 785
 786
 787 /**************************************************************************
 788  *      RtlUnicodeToMultiByteN   (NTDLL.@)
 789  *
 790  * Converts a Unicode string to a multi-byte string in the ANSI code page.
 791  *
 792  * RETURNS
 793  *  NTSTATUS code
 794  */
 795 NTSTATUS WINAPI RtlUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 796                                         LPCWSTR src, DWORD srclen )
 797 {
 798     int ret = wine_cp_wcstombs( ansi_table, 0, src, srclen / sizeof(WCHAR),
 799                                 dst, dstlen, NULL, NULL );
 800     if (reslen)
 801         *reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
 802     return STATUS_SUCCESS;
 803 }
 804
 805
 806 /**************************************************************************
 807  *      RtlUnicodeToOemN   (NTDLL.@)
 808  *
 809  * Converts a Unicode string to a multi-byte string in the OEM code page.
 810  *
 811  * RETURNS
 812  *  NTSTATUS code
 813  */
 814 NTSTATUS WINAPI RtlUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 815                                   LPCWSTR src, DWORD srclen )
 816 {
 817     int ret = wine_cp_wcstombs( oem_table, 0, src, srclen / sizeof(WCHAR),
 818                                 dst, dstlen, NULL, NULL );
 819     if (reslen)
 820         *reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
 821     return STATUS_SUCCESS;
 822 }
 823
 824
 825 /*
 826      CASE CONVERSIONS
 827 */
 828
 829
 830 /**************************************************************************
 831  *      RtlUpperChar   (NTDLL.@)
 832  *
 833  * Converts an Ascii character to uppercase.
 834  *
 835  * PARAMS
 836  *  ch [I] Character to convert
 837  *
 838  * RETURNS
 839  *  The uppercase character value.
 840  *
 841  * NOTES
 842  *  For the input characters from 'a' .. 'z' it returns 'A' .. 'Z'.
 843  *  All other input characters are returned unchanged. The locale and
 844  *  multibyte characters are not taken into account (as native DLL).
 845  */
 846 CHAR WINAPI RtlUpperChar( CHAR ch )
 847 {
 848     if (ch >= 'a' && ch <= 'z') {
 849         return ch - 'a' + 'A';
 850     } else {
 851         return ch;
 852     } /* if */
 853 }
 854
 855
 856 /**************************************************************************
 857  *      RtlUpperString   (NTDLL.@)
 858  *
 859  * Converts an Ascii string to uppercase.
 860  *
 861  * PARAMS
 862  *  dst [O] Destination for converted string
 863  *  src [I] Source string to convert
 864  *
 865  * RETURNS
 866  *  Nothing.
 867  *
 868  * NOTES
 869  *  For the src characters from 'a' .. 'z' it assigns 'A' .. 'Z' to dst.
 870  *  All other src characters are copied unchanged to dst. The locale and
 871  *  multibyte characters are not taken into account (as native DLL).
 872  *  The number of character copied is the minimum of src->Length and
 873  *  the dst->MaximumLength.
 874  */
 875 void WINAPI RtlUpperString( STRING *dst, const STRING *src )
 876 {
 877     unsigned int i, len = min(src->Length, dst->MaximumLength);
 878
 879     for (i = 0; i < len; i++) dst->Buffer[i] = RtlUpperChar(src->Buffer[i]);
 880     dst->Length = len;
 881 }
 882
 883
 884 /**************************************************************************
 885  *      RtlUpcaseUnicodeChar   (NTDLL.@)
 886  *
 887  * Converts an Unicode character to uppercase.
 888  *
 889  * PARAMS
 890  *  wch [I] Character to convert
 891  *
 892  * RETURNS
 893  *  The uppercase character value.
 894  */
 895 WCHAR WINAPI RtlUpcaseUnicodeChar( WCHAR wch )
 896 {
 897     return toupperW(wch);
 898 }
 899
 900
 901 /**************************************************************************
 902  *      RtlDowncaseUnicodeChar   (NTDLL.@)
 903  *
 904  * Converts an Unicode character to lowercase.
 905  *
 906  * PARAMS
 907  *  wch [I] Character to convert
 908  *
 909  * RETURNS
 910  *  The lowercase character value.
 911  */
 912 WCHAR WINAPI RtlDowncaseUnicodeChar(WCHAR wch)
 913 {
 914     return tolowerW(wch);
 915 }
 916
 917
 918 /**************************************************************************
 919  *      RtlUpcaseUnicodeString   (NTDLL.@)
 920  *
 921  * Converts an Unicode string to uppercase.
 922  *
 923  * PARAMS
 924  *  dest    [O] Destination for converted string
 925  *  src     [I] Source string to convert
 926  *  doalloc [I] TRUE=Allocate a buffer for dest if it doesn't have one
 927  *
 928  * RETURNS
 929  *  Success: STATUS_SUCCESS. dest contains the converted string.
 930  *  Failure: STATUS_NO_MEMORY, if doalloc is TRUE and memory allocation fails, or
 931  *           STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and dest is too small.
 932  *
 933  * NOTES
 934  *  dest is never '\0' terminated because it may be equal to src, and src
 935  *  might not be '\0' terminated. dest->Length is only set upon success.
 936  */
 937 NTSTATUS WINAPI RtlUpcaseUnicodeString( UNICODE_STRING *dest,
 938                                         const UNICODE_STRING *src,
 939                                         BOOLEAN doalloc)
 940 {
 941     DWORD i, len = src->Length;
 942
 943     if (doalloc)
 944     {
 945         dest->MaximumLength = len;
 946         if (!(dest->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len )))
 947             return STATUS_NO_MEMORY;
 948     }
 949     else if (len > dest->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 950
 951     for (i = 0; i < len/sizeof(WCHAR); i++) dest->Buffer[i] = toupperW(src->Buffer[i]);
 952     dest->Length = len;
 953     return STATUS_SUCCESS;
 954 }
 955
 956
 957 /**************************************************************************
 958  *      RtlDowncaseUnicodeString   (NTDLL.@)
 959  *
 960  * Converts an Unicode string to lowercase.
 961  *
 962  * PARAMS
 963  *  dest    [O] Destination for converted string
 964  *  src     [I] Source string to convert
 965  *  doalloc [I] TRUE=Allocate a buffer for dest if it doesn't have one
 966  *
 967  * RETURNS
 968  *  Success: STATUS_SUCCESS. dest contains the converted string.
 969  *  Failure: STATUS_NO_MEMORY, if doalloc is TRUE and memory allocation fails, or
 970  *           STATUS_BUFFER_OVERFLOW, if doalloc is FALSE and dest is too small.
 971  *
 972  * NOTES
 973  *  dest is never '\0' terminated because it may be equal to src, and src
 974  *  might not be '\0' terminated. dest->Length is only set upon success.
 975  */
 976 NTSTATUS WINAPI RtlDowncaseUnicodeString(
 977     UNICODE_STRING *dest,
 978     const UNICODE_STRING *src,
 979     BOOLEAN doalloc)
 980 {
 981     DWORD i;
 982     DWORD len = src->Length;
 983
 984     if (doalloc) {
 985         dest->MaximumLength = len;
 986         if (!(dest->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) {
 987             return STATUS_NO_MEMORY;
 988         } /* if */
 989     } else if (len > dest->MaximumLength) {
 990         return STATUS_BUFFER_OVERFLOW;
 991     } /* if */
 992
 993     for (i = 0; i < len/sizeof(WCHAR); i++) {
 994         dest->Buffer[i] = tolowerW(src->Buffer[i]);
 995     } /* for */
 996     dest->Length = len;
 997     return STATUS_SUCCESS;
 998 }
 999
1000
1001 /**************************************************************************
1002  *      RtlUpcaseUnicodeStringToAnsiString   (NTDLL.@)
1003  *
1004  * Converts a Unicode string to the equivalent ANSI upper-case representation.
1005  *
1006  * RETURNS
1007  *  NTSTATUS code
1008  *
1009  * NOTES
1010  *  writes terminating 0
1011  */
1012 NTSTATUS WINAPI RtlUpcaseUnicodeStringToAnsiString( STRING *dst,
1013                                                     const UNICODE_STRING *src,
1014                                                     BOOLEAN doalloc )
1015 {
1016     NTSTATUS ret;
1017     UNICODE_STRING upcase;
1018
1019     if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
1020     {
1021         ret = RtlUnicodeStringToAnsiString( dst, &upcase, doalloc );
1022         RtlFreeUnicodeString( &upcase );
1023     }
1024     return ret;
1025 }
1026
1027
1028 /**************************************************************************
1029  *      RtlUpcaseUnicodeStringToOemString   (NTDLL.@)
1030  *
1031  * Converts a UNICODE_STRING to the equivalent OEM upper-case representation
1032  * stored in STRING format.
1033  *
1034  * RETURNS
1035  *  NTSTATUS code
1036  *
1037  * NOTES
1038  *  writes terminating 0
1039  */
1040 NTSTATUS WINAPI RtlUpcaseUnicodeStringToOemString( STRING *dst,
1041                                                    const UNICODE_STRING *src,
1042                                                    BOOLEAN doalloc )
1043 {
1044     NTSTATUS ret;
1045     UNICODE_STRING upcase;
1046
1047     if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
1048     {
1049         ret = RtlUnicodeStringToOemString( dst, &upcase, doalloc );
1050         RtlFreeUnicodeString( &upcase );
1051     }
1052     return ret;
1053 }
1054
1055
1056 /**************************************************************************
1057  *      RtlUpcaseUnicodeStringToCountedOemString   (NTDLL.@)
1058  *
1059  * Converts a UNICODE_STRING to the equivalent OEM upper-case representation
1060  * stored in STRING format.
1061  *
1062  * RETURNS
1063  *  NTSTATUS code
1064  *
1065  * NOTES
1066  *  Same as RtlUpcaseUnicodeStringToOemString but doesn't write terminating null
1067  */
1068 NTSTATUS WINAPI RtlUpcaseUnicodeStringToCountedOemString( STRING *oem,
1069                                                           const UNICODE_STRING *uni,
1070                                                           BOOLEAN doalloc )
1071 {
1072     NTSTATUS ret;
1073     UNICODE_STRING upcase;
1074
1075     if (!(ret = RtlUpcaseUnicodeString( &upcase, uni, TRUE )))
1076     {
1077         DWORD len = RtlUnicodeStringToOemSize( &upcase ) - 1;
1078         oem->Length = len;
1079         if (doalloc)
1080         {
1081             oem->MaximumLength = len;
1082             if (!(oem->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len )))
1083             {
1084                 ret = STATUS_NO_MEMORY;
1085                 goto done;
1086             }
1087         }
1088         else if (oem->MaximumLength < len)
1089         {
1090             ret = STATUS_BUFFER_OVERFLOW;
1091             oem->Length = oem->MaximumLength;
1092             if (!oem->MaximumLength) goto done;
1093         }
1094         RtlUnicodeToOemN( oem->Buffer, oem->Length, NULL, upcase.Buffer, upcase.Length );
1095     done:
1096         RtlFreeUnicodeString( &upcase );
1097     }
1098     return ret;
1099 }
1100
1101
1102 /**************************************************************************
1103  *      RtlUpcaseUnicodeToMultiByteN   (NTDLL.@)
1104  *
1105  * Converts a Unicode string to the equivalent ANSI upper-case representation.
1106  *
1107  * RETURNS
1108  *  NTSTATUS code
1109  */
1110 NTSTATUS WINAPI RtlUpcaseUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
1111                                               LPCWSTR src, DWORD srclen )
1112 {
1113     NTSTATUS ret;
1114     LPWSTR upcase;
1115     DWORD i;
1116
1117     if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
1118     for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
1119     ret = RtlUnicodeToMultiByteN( dst, dstlen, reslen, upcase, srclen );
1120     RtlFreeHeap( GetProcessHeap(), 0, upcase );
1121     return ret;
1122 }
1123
1124
1125 /**************************************************************************
1126  *      RtlUpcaseUnicodeToOemN   (NTDLL.@)
1127  *
1128  * Converts a Unicode string to the equivalent OEM upper-case representation.
1129  *
1130  * RETURNS
1131  *  NTSTATUS code
1132  */
1133 NTSTATUS WINAPI RtlUpcaseUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
1134                                         LPCWSTR src, DWORD srclen )
1135 {
1136     NTSTATUS ret;
1137     LPWSTR upcase;
1138     DWORD i;
1139
1140     if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
1141     for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
1142     ret = RtlUnicodeToOemN( dst, dstlen, reslen, upcase, srclen );
1143     RtlFreeHeap( GetProcessHeap(), 0, upcase );
1144     return ret;
1145 }
1146
1147
1148 /*
1149         STRING SIZE
1150 */
1151
1152
1153 /**************************************************************************
1154  *      RtlOemStringToUnicodeSize   (NTDLL.@)
1155  *      RtlxOemStringToUnicodeSize  (NTDLL.@)
1156  *
1157  * Calculate the size in bytes necessary for the Unicode conversion of str,
1158  * including the terminating '\0'.
1159  *
1160  * PARAMS
1161  *  str [I] String to calculate the size of
1162  *
1163  * RETURNS
1164  *  The calculated size.
1165  */
1166 UINT WINAPI RtlOemStringToUnicodeSize( const STRING *str )
1167 {
1168     int ret = wine_cp_mbstowcs( oem_table, 0, str->Buffer, str->Length, NULL, 0 );
1169     return (ret + 1) * sizeof(WCHAR);
1170 }
1171
1172
1173 /**************************************************************************
1174  *      RtlAnsiStringToUnicodeSize   (NTDLL.@)
1175  *      RtlxAnsiStringToUnicodeSize  (NTDLL.@)
1176  *
1177  * Calculate the size in bytes necessary for the Unicode conversion of str,
1178  * including the terminating '\0'.
1179  *
1180  * PARAMS
1181  *  str [I] String to calculate the size of
1182  *
1183  * RETURNS
1184  *  The calculated size.
1185  */
1186 DWORD WINAPI RtlAnsiStringToUnicodeSize( const STRING *str )
1187 {
1188     DWORD ret;
1189     RtlMultiByteToUnicodeSize( &ret, str->Buffer, str->Length );
1190     return ret + sizeof(WCHAR);
1191 }
1192
1193
1194 /**************************************************************************
1195  *      RtlMultiByteToUnicodeSize   (NTDLL.@)
1196  *
1197  * Compute the size in bytes necessary for the Unicode conversion of str,
1198  * without the terminating '\0'.
1199  *
1200  * PARAMS
1201  *  size [O] Destination for size
1202  *  str  [I] String to calculate the size of
1203  *  len  [I] Length of str
1204  *
1205  * RETURNS
1206  *  STATUS_SUCCESS.
1207  */
1208 NTSTATUS WINAPI RtlMultiByteToUnicodeSize( DWORD *size, LPCSTR str, UINT len )
1209 {
1210     *size = wine_cp_mbstowcs( ansi_table, 0, str, len, NULL, 0 ) * sizeof(WCHAR);
1211     return STATUS_SUCCESS;
1212 }
1213
1214
1215 /**************************************************************************
1216  *      RtlUnicodeToMultiByteSize   (NTDLL.@)
1217  *
1218  * Calculate the size in bytes necessary for the multibyte conversion of str,
1219  * without the terminating '\0'.
1220  *
1221  * PARAMS
1222  *  size [O] Destination for size
1223  *  str  [I] String to calculate the size of
1224  *  len  [I] Length of str
1225  *
1226  * RETURNS
1227  *  STATUS_SUCCESS.
1228  */
1229 NTSTATUS WINAPI RtlUnicodeToMultiByteSize( PULONG size, LPCWSTR str, ULONG len )
1230 {
1231     *size = wine_cp_wcstombs( ansi_table, 0, str, len / sizeof(WCHAR), NULL, 0, NULL, NULL );
1232     return STATUS_SUCCESS;
1233 }
1234
1235
1236 /**************************************************************************
1237  *      RtlUnicodeStringToAnsiSize   (NTDLL.@)
1238  *      RtlxUnicodeStringToAnsiSize  (NTDLL.@)
1239  *
1240  * Calculate the size in bytes necessary for the Ansi conversion of str,
1241  * including the terminating '\0'.
1242  *
1243  * PARAMS
1244  *  str [I] String to calculate the size of
1245  *
1246  * RETURNS
1247  *  The calculated size.
1248  */
1249 DWORD WINAPI RtlUnicodeStringToAnsiSize( const UNICODE_STRING *str )
1250 {
1251     DWORD ret;
1252     RtlUnicodeToMultiByteSize( &ret, str->Buffer, str->Length );
1253     return ret + 1;
1254 }
1255
1256
1257 /**************************************************************************
1258  *      RtlUnicodeStringToOemSize   (NTDLL.@)
1259  *      RtlxUnicodeStringToOemSize  (NTDLL.@)
1260  *
1261  * Calculate the size in bytes necessary for the OEM conversion of str,
1262  * including the terminating '\0'.
1263  *
1264  * PARAMS
1265  *  str [I] String to calculate the size of
1266  *
1267  * RETURNS
1268  *  The calculated size.
1269  */
1270 DWORD WINAPI RtlUnicodeStringToOemSize( const UNICODE_STRING *str )
1271 {
1272     return wine_cp_wcstombs( oem_table, 0, str->Buffer, str->Length / sizeof(WCHAR),
1273                              NULL, 0, NULL, NULL ) + 1;
1274 }
1275
1276
1277 /**************************************************************************
1278  *      RtlAppendAsciizToString   (NTDLL.@)
1279  *
1280  * Concatenates a buffered character string and a '\0' terminated character
1281  * string
1282  *
1283  * RETURNS
1284  *  Success: STATUS_SUCCESS. src is appended to dest.
1285  *  Failure: STATUS_BUFFER_TOO_SMALL, if the buffer of dest is to small
1286  *                  to hold the concatenated string.
1287  *
1288  * NOTES
1289  *  if src is NULL dest is unchanged.
1290  *  dest is never '\0' terminated.
1291  */
1292 NTSTATUS WINAPI RtlAppendAsciizToString(
1293     STRING *dest, /* [I/O] Buffered character string to which src is concatenated */
1294     LPCSTR src)   /* [I]   '\0' terminated character string to be concatenated */
1295 {
1296     if (src != NULL) {
1297         unsigned int src_len = strlen(src);
1298         unsigned int dest_len  = src_len + dest->Length;
1299
1300         if (dest_len > dest->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
1301         memcpy(dest->Buffer + dest->Length, src, src_len);
1302         dest->Length = dest_len;
1303     } /* if */
1304     return STATUS_SUCCESS;
1305 }
1306
1307
1308 /**************************************************************************
1309  *      RtlAppendStringToString   (NTDLL.@)
1310  *
1311  * Concatenates two buffered character strings
1312  *
1313  * RETURNS
1314  *  Success: STATUS_SUCCESS. src is appended to dest.
1315  *  Failure: STATUS_BUFFER_TOO_SMALL, if the buffer of dest is to small
1316  *                  to hold the concatenated string.
1317  *
1318  * NOTES
1319  *  if src->length is zero dest is unchanged.
1320  *  dest is never '\0' terminated.
1321  */
1322 NTSTATUS WINAPI RtlAppendStringToString(
1323     STRING *dest,       /* [I/O] Buffered character string to which src is concatenated */
1324     const STRING *src)  /* [I]   Buffered character string to be concatenated */
1325 {
1326     if (src->Length != 0) {
1327         unsigned int dest_len = src->Length + dest->Length;
1328
1329         if (dest_len > dest->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
1330         memcpy(dest->Buffer + dest->Length, src->Buffer, src->Length);
1331         dest->Length = dest_len;
1332     } /* if */
1333     return STATUS_SUCCESS;
1334 }
1335
1336
1337 /**************************************************************************
1338  *      RtlAppendUnicodeToString   (NTDLL.@)
1339  *
1340  * Concatenates an buffered unicode string and a '\0' terminated unicode
1341  * string
1342  *
1343  * RETURNS
1344  *  Success: STATUS_SUCCESS. src is appended to dest.
1345  *  Failure: STATUS_BUFFER_TOO_SMALL, if the buffer of dest is to small
1346  *                  to hold the concatenated string.
1347  *
1348  * NOTES
1349  *  if src is NULL dest is unchanged.
1350  *  dest is '\0' terminated when the MaximumLength allowes it.
1351  *  When dest fits exactly in MaximumLength characters the '\0' is ommitted.
1352  *
1353  * DIFFERENCES
1354  *  Does not write in the src->Buffer beyond MaximumLength when
1355  *  MaximumLength is odd as the native function does.
1356  */
1357 NTSTATUS WINAPI RtlAppendUnicodeToString(
1358     UNICODE_STRING *dest, /* [I/O] Buffered unicode string to which src is concatenated */
1359     LPCWSTR src)          /* [I]   '\0' terminated unicode string to be concatenated */
1360 {
1361     if (src != NULL) {
1362         unsigned int src_len = strlenW(src) * sizeof(WCHAR);
1363         unsigned int dest_len  = src_len + dest->Length;
1364
1365         if (dest_len > dest->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
1366         memcpy(dest->Buffer + dest->Length/sizeof(WCHAR), src, src_len);
1367         dest->Length = dest_len;
1368         /* append terminating '\0' if enough space */
1369         if (dest_len + sizeof(WCHAR) <= dest->MaximumLength) {
1370             dest->Buffer[dest_len / sizeof(WCHAR)] = 0;
1371         } /* if */
1372     } /* if */
1373     return STATUS_SUCCESS;
1374 }
1375
1376
1377 /**************************************************************************
1378  *      RtlAppendUnicodeStringToString   (NTDLL.@)
1379  *
1380  * Concatenates two buffered unicode strings
1381  *
1382  * RETURNS
1383  *  Success: STATUS_SUCCESS. src is appended to dest.
1384  *  Failure: STATUS_BUFFER_TOO_SMALL, if the buffer of dest is to small
1385  *                  to hold the concatenated string.
1386  *
1387  * NOTES
1388  *  if src->length is zero dest is unchanged.
1389  *  dest is '\0' terminated when the MaximumLength allowes it.
1390  *  When dest fits exactly in MaximumLength characters the '\0' is ommitted.
1391  *
1392  * DIFFERENCES
1393  *  Does not write in the src->Buffer beyond MaximumLength when
1394  *  MaximumLength is odd as the native function does.
1395  */
1396 NTSTATUS WINAPI RtlAppendUnicodeStringToString(
1397     UNICODE_STRING *dest,      /* [I/O] Buffered unicode string to which src is concatenated */
1398     const UNICODE_STRING *src) /* [I]   Buffered unicode string to be concatenated */
1399 {
1400     if (src->Length != 0) {
1401         unsigned int dest_len = src->Length + dest->Length;
1402
1403         if (dest_len > dest->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
1404         memcpy(dest->Buffer + dest->Length/sizeof(WCHAR), src->Buffer, src->Length);
1405         dest->Length = dest_len;
1406         /* append terminating '\0' if enough space */
1407         if (dest_len + sizeof(WCHAR) <= dest->MaximumLength) {
1408             dest->Buffer[dest_len / sizeof(WCHAR)] = 0;
1409         } /* if */
1410     } /* if */
1411     return STATUS_SUCCESS;
1412 }
1413
1414
1415 /**************************************************************************
1416  *      RtlFindCharInUnicodeString   (NTDLL.@)
1417  *
1418  * Searches for one of several unicode characters in an unicode string.
1419  *
1420  * RETURNS
1421  *  Success: STATUS_SUCCESS. pos contains the position after the character found.
1422  *  Failure: STATUS_NOT_FOUND, if none of the search_chars are in main_str.
1423  */
1424 NTSTATUS WINAPI RtlFindCharInUnicodeString(
1425     int flags,                          /* [I] Flags */
1426     const UNICODE_STRING *main_str,     /* [I] Unicode string in which one or more characters are searched */
1427     const UNICODE_STRING *search_chars, /* [I] Unicode string which contains the characters to search for */
1428     USHORT *pos)                        /* [O] Position of the first character found + 2 */
1429 {
1430     int main_idx;
1431     unsigned int search_idx;
1432
1433     switch (flags) {
1434         case 0:
1435             for (main_idx = 0; main_idx < main_str->Length / sizeof(WCHAR); main_idx++) {
1436                 for (search_idx = 0; search_idx < search_chars->Length / sizeof(WCHAR); search_idx++) {
1437                     if (main_str->Buffer[main_idx] == search_chars->Buffer[search_idx]) {
1438                         *pos = (main_idx + 1) * sizeof(WCHAR);
1439                         return STATUS_SUCCESS;
1440                     }
1441                 }
1442             }
1443             *pos = 0;
1444             return STATUS_NOT_FOUND;
1445         case 1:
1446             for (main_idx = main_str->Length / sizeof(WCHAR) - 1; main_idx >= 0; main_idx--) {
1447                 for (search_idx = 0; search_idx < search_chars->Length / sizeof(WCHAR); search_idx++) {
1448                     if (main_str->Buffer[main_idx] == search_chars->Buffer[search_idx]) {
1449                         *pos = main_idx * sizeof(WCHAR);
1450                         return STATUS_SUCCESS;
1451                     }
1452                 }
1453             }
1454             *pos = 0;
1455             return STATUS_NOT_FOUND;
1456         case 2:
1457             for (main_idx = 0; main_idx < main_str->Length / sizeof(WCHAR); main_idx++) {
1458                 search_idx = 0;
1459                 while (search_idx < search_chars->Length / sizeof(WCHAR) &&
1460                          main_str->Buffer[main_idx] != search_chars->Buffer[search_idx]) {
1461                     search_idx++;
1462                 }
1463                 if (search_idx >= search_chars->Length / sizeof(WCHAR)) {
1464                     *pos = (main_idx + 1) * sizeof(WCHAR);
1465                     return STATUS_SUCCESS;
1466                 }
1467             }
1468             *pos = 0;
1469             return STATUS_NOT_FOUND;
1470         case 3:
1471             for (main_idx = main_str->Length / sizeof(WCHAR) - 1; main_idx >= 0; main_idx--) {
1472                 search_idx = 0;
1473                 while (search_idx < search_chars->Length / sizeof(WCHAR) &&
1474                          main_str->Buffer[main_idx] != search_chars->Buffer[search_idx]) {
1475                     search_idx++;
1476                 }
1477                 if (search_idx >= search_chars->Length / sizeof(WCHAR)) {
1478                     *pos = main_idx * sizeof(WCHAR);
1479                     return STATUS_SUCCESS;
1480                 }
1481             }
1482             *pos = 0;
1483             return STATUS_NOT_FOUND;
1484     } /* switch */
1485     return STATUS_NOT_FOUND;
1486 }
1487
1488
1489 /*
1490         MISC
1491 */
1492 /* Tests that we currently implement */
1493 #define ITU_IMPLEMENTED_TESTS \
1494     (IS_TEXT_UNICODE_SIGNATURE | \
1495      IS_TEXT_UNICODE_REVERSE_SIGNATURE | \
1496      IS_TEXT_UNICODE_ODD_LENGTH | \
1497      IS_TEXT_UNICODE_STATISTICS | \
1498      IS_TEXT_UNICODE_NULL_BYTES)
1499
1500 /**************************************************************************
1501  *      RtlIsTextUnicode (NTDLL.@)
1502  *
1503  * Attempt to guess whether a text buffer is Unicode.
1504  *
1505  * PARAMS
1506  *  buf [I] Text buffer to test
1507  *  len [I] Length of buf
1508  *  pf  [O] Destination for test results
1509  *
1510  * RETURNS
1511  *  The length of the string if all tests were passed, 0 otherwise.
1512  *
1513  * FIXME
1514  *  Should implement more tests.
1515  */
1516 DWORD WINAPI RtlIsTextUnicode(
1517         LPVOID buf,
1518         DWORD len,
1519         DWORD *pf)
1520 {
1521         LPWSTR s = buf;
1522         DWORD flags = -1, out_flags = 0;
1523
1524         if (!len)
1525                 goto out;
1526         if (pf)
1527                 flags = *pf;
1528         /*
1529          * Apply various tests to the text string. According to the
1530          * docs, each test "passed" sets the corresponding flag in
1531          * the output flags. But some of the tests are mutually
1532          * exclusive, so I don't see how you could pass all tests ...
1533          */
1534
1535         /* Check for an odd length ... pass if even. */
1536         if ((flags & IS_TEXT_UNICODE_ODD_LENGTH) && (len & 1))
1537                 out_flags |= IS_TEXT_UNICODE_ODD_LENGTH;
1538
1539         /* Check for the special byte order unicode marks. */
1540         if ((flags & IS_TEXT_UNICODE_SIGNATURE) && *s == 0xFEFF)
1541                 out_flags |= IS_TEXT_UNICODE_SIGNATURE;
1542
1543     if ((flags & IS_TEXT_UNICODE_REVERSE_SIGNATURE) && *s == 0xFFFE)
1544         out_flags |= IS_TEXT_UNICODE_REVERSE_SIGNATURE;
1545
1546     /* apply some statistical analysis */
1547     if (flags & IS_TEXT_UNICODE_STATISTICS)
1548     {
1549         DWORD i, stats = 0;
1550         /* FIXME: checks only for ASCII characters in the unicode stream */
1551         for (i = 0; i < len / sizeof(WCHAR); i++)
1552         {
1553             if (s[i] <= 255) stats++;
1554         }
1555         if (stats > len / sizeof(WCHAR) / 2)
1556             out_flags |= IS_TEXT_UNICODE_STATISTICS;
1557     }
1558
1559     /* Check for unicode NULL chars */
1560     if (flags & IS_TEXT_UNICODE_NULL_BYTES)
1561     {
1562         DWORD i;
1563         for (i = 0; i < len / sizeof(WCHAR); i++)
1564         {
1565             if (!s[i])
1566             {
1567                 out_flags |= IS_TEXT_UNICODE_NULL_BYTES;
1568                 break;
1569             }
1570         }
1571     }
1572
1573         /*
1574          * Check whether the string passed all of the tests.
1575          */
1576         flags &= ITU_IMPLEMENTED_TESTS;
1577         if ((out_flags & flags) != flags)
1578                 len = 0;
1579 out:
1580         if (pf)
1581                 *pf = out_flags;
1582         return len;
1583 }
1584
1585
1586 /**************************************************************************
1587  *      RtlCharToInteger   (NTDLL.@)
1588  *
1589  * Converts a character string into its integer equivalent.
1590  *
1591  * RETURNS
1592  *  Success: STATUS_SUCCESS. value contains the converted number
1593  *  Failure: STATUS_INVALID_PARAMETER, if base is not 0, 2, 8, 10 or 16.
1594  *           STATUS_ACCESS_VIOLATION, if value is NULL.
1595  *
1596  * NOTES
1597  *  For base 0 it uses 10 as base and the string should be in the format
1598  *      "{whitespace} [+|-] [0[x|o|b]] {digits}".
1599  *  For other bases the string should be in the format
1600  *      "{whitespace} [+|-] {digits}".
1601  *  No check is made for value overflow, only the lower 32 bits are assigned.
1602  *  If str is NULL it crashes, as the native function does.
1603  *
1604  * DIFFERENCES
1605  *  This function does not read garbage behind '\0' as the native version does.
1606  */
1607 NTSTATUS WINAPI RtlCharToInteger(
1608     PCSZ str,      /* [I] '\0' terminated single-byte string containing a number */
1609     ULONG base,    /* [I] Number base for conversion (allowed 0, 2, 8, 10 or 16) */
1610     ULONG *value)  /* [O] Destination for the converted value */
1611 {
1612     CHAR chCurrent;
1613     int digit;
1614     ULONG RunningTotal = 0;
1615     char bMinus = 0;
1616
1617     while (*str != '\0' && *str <= ' ') {
1618         str++;
1619     } /* while */
1620
1621     if (*str == '+') {
1622         str++;
1623     } else if (*str == '-') {
1624         bMinus = 1;
1625         str++;
1626     } /* if */
1627
1628     if (base == 0) {
1629         base = 10;
1630         if (str[0] == '0') {
1631             if (str[1] == 'b') {
1632                 str += 2;
1633                 base = 2;
1634             } else if (str[1] == 'o') {
1635                 str += 2;
1636                 base = 8;
1637             } else if (str[1] == 'x') {
1638                 str += 2;
1639                 base = 16;
1640             } /* if */
1641         } /* if */
1642     } else if (base != 2 && base != 8 && base != 10 && base != 16) {
1643         return STATUS_INVALID_PARAMETER;
1644     } /* if */
1645
1646     if (value == NULL) {
1647         return STATUS_ACCESS_VIOLATION;
1648     } /* if */
1649
1650     while (*str != '\0') {
1651         chCurrent = *str;
1652         if (chCurrent >= '0' && chCurrent <= '9') {
1653             digit = chCurrent - '0';
1654         } else if (chCurrent >= 'A' && chCurrent <= 'Z') {
1655             digit = chCurrent - 'A' + 10;
1656         } else if (chCurrent >= 'a' && chCurrent <= 'z') {
1657             digit = chCurrent - 'a' + 10;
1658         } else {
1659             digit = -1;
1660         } /* if */
1661         if (digit < 0 || digit >= base) {
1662             *value = bMinus ? -RunningTotal : RunningTotal;
1663             return STATUS_SUCCESS;
1664         } /* if */
1665
1666         RunningTotal = RunningTotal * base + digit;
1667         str++;
1668     } /* while */
1669
1670     *value = bMinus ? -RunningTotal : RunningTotal;
1671     return STATUS_SUCCESS;
1672 }
1673
1674
1675 /**************************************************************************
1676  *      RtlIntegerToChar   (NTDLL.@)
1677  *
1678  * Converts an unsigned integer to a character string.
1679  *
1680  * RETURNS
1681  *  Success: STATUS_SUCCESS. str contains the converted number
1682  *  Failure: STATUS_INVALID_PARAMETER, if base is not 0, 2, 8, 10 or 16.
1683  *           STATUS_BUFFER_OVERFLOW, if str would be larger than length.
1684  *           STATUS_ACCESS_VIOLATION, if str is NULL.
1685  *
1686  * NOTES
1687  *  Instead of base 0 it uses 10 as base.
1688  *  Writes at most length characters to the string str.
1689  *  Str is '\0' terminated when length allowes it.
1690  *  When str fits exactly in length characters the '\0' is ommitted.
1691  */
1692 NTSTATUS WINAPI RtlIntegerToChar(
1693     ULONG value,   /* [I] Value to be converted */
1694     ULONG base,    /* [I] Number base for conversion (allowed 0, 2, 8, 10 or 16) */
1695     ULONG length,  /* [I] Length of the str buffer in bytes */
1696     PCHAR str)     /* [O] Destination for the converted value */
1697 {
1698     CHAR buffer[33];
1699     PCHAR pos;
1700     CHAR digit;
1701     ULONG len;
1702
1703     if (base == 0) {
1704         base = 10;
1705     } else if (base != 2 && base != 8 && base != 10 && base != 16) {
1706         return STATUS_INVALID_PARAMETER;
1707     } /* if */
1708
1709     pos = &buffer[32];
1710     *pos = '\0';
1711
1712     do {
1713         pos--;
1714         digit = value % base;
1715         value = value / base;
1716         if (digit < 10) {
1717             *pos = '0' + digit;
1718         } else {
1719             *pos = 'A' + digit - 10;
1720         } /* if */
1721     } while (value != 0L);
1722
1723     len = &buffer[32] - pos;
1724     if (len > length) {
1725         return STATUS_BUFFER_OVERFLOW;
1726     } else if (str == NULL) {
1727         return STATUS_ACCESS_VIOLATION;
1728     } else if (len == length) {
1729         memcpy(str, pos, len);
1730     } else {
1731         memcpy(str, pos, len + 1);
1732     } /* if */
1733     return STATUS_SUCCESS;
1734 }
1735
1736
1737 /**************************************************************************
1738  *      RtlUnicodeStringToInteger (NTDLL.@)
1739  *
1740  * Converts an unicode string into its integer equivalent.
1741  *
1742  * RETURNS
1743  *  Success: STATUS_SUCCESS. value contains the converted number
1744  *  Failure: STATUS_INVALID_PARAMETER, if base is not 0, 2, 8, 10 or 16.
1745  *           STATUS_ACCESS_VIOLATION, if value is NULL.
1746  *
1747  * NOTES
1748  *  For base 0 it uses 10 as base and the string should be in the format
1749  *      "{whitespace} [+|-] [0[x|o|b]] {digits}".
1750  *  For other bases the string should be in the format
1751  *      "{whitespace} [+|-] {digits}".
1752  *  No check is made for value overflow, only the lower 32 bits are assigned.
1753  *  If str is NULL it crashes, as the native function does.
1754  *
1755  * DIFFERENCES
1756  *  This function does not read garbage on string length 0 as the native
1757  *  version does.
1758  */
1759 NTSTATUS WINAPI RtlUnicodeStringToInteger(
1760     const UNICODE_STRING *str, /* [I] Unicode string to be converted */
1761     ULONG base,                /* [I] Number base for conversion (allowed 0, 2, 8, 10 or 16) */
1762     ULONG *value)              /* [O] Destination for the converted value */
1763 {
1764     LPWSTR lpwstr = str->Buffer;
1765     USHORT CharsRemaining = str->Length / sizeof(WCHAR);
1766     WCHAR wchCurrent;
1767     int digit;
1768     ULONG RunningTotal = 0;
1769     char bMinus = 0;
1770
1771     while (CharsRemaining >= 1 && *lpwstr <= ' ') {
1772         lpwstr++;
1773         CharsRemaining--;
1774     } /* while */
1775
1776     if (CharsRemaining >= 1) {
1777         if (*lpwstr == '+') {
1778             lpwstr++;
1779             CharsRemaining--;
1780         } else if (*lpwstr == '-') {
1781             bMinus = 1;
1782             lpwstr++;
1783             CharsRemaining--;
1784         } /* if */
1785     } /* if */
1786
1787     if (base == 0) {
1788         base = 10;
1789         if (CharsRemaining >= 2 && lpwstr[0] == '0') {
1790             if (lpwstr[1] == 'b') {
1791                 lpwstr += 2;
1792                 CharsRemaining -= 2;
1793                 base = 2;
1794             } else if (lpwstr[1] == 'o') {
1795                 lpwstr += 2;
1796                 CharsRemaining -= 2;
1797                 base = 8;
1798             } else if (lpwstr[1] == 'x') {
1799                 lpwstr += 2;
1800                 CharsRemaining -= 2;
1801                 base = 16;
1802             } /* if */
1803         } /* if */
1804     } else if (base != 2 && base != 8 && base != 10 && base != 16) {
1805         return STATUS_INVALID_PARAMETER;
1806     } /* if */
1807
1808     if (value == NULL) {
1809         return STATUS_ACCESS_VIOLATION;
1810     } /* if */
1811
1812     while (CharsRemaining >= 1) {
1813         wchCurrent = *lpwstr;
1814         if (wchCurrent >= '0' && wchCurrent <= '9') {
1815             digit = wchCurrent - '0';
1816         } else if (wchCurrent >= 'A' && wchCurrent <= 'Z') {
1817             digit = wchCurrent - 'A' + 10;
1818         } else if (wchCurrent >= 'a' && wchCurrent <= 'z') {
1819             digit = wchCurrent - 'a' + 10;
1820         } else {
1821             digit = -1;
1822         } /* if */
1823         if (digit < 0 || digit >= base) {
1824             *value = bMinus ? -RunningTotal : RunningTotal;
1825             return STATUS_SUCCESS;
1826         } /* if */
1827
1828         RunningTotal = RunningTotal * base + digit;
1829         lpwstr++;
1830         CharsRemaining--;
1831     } /* while */
1832
1833     *value = bMinus ? -RunningTotal : RunningTotal;
1834     return STATUS_SUCCESS;
1835 }
1836
1837
1838 /**************************************************************************
1839  *      RtlIntegerToUnicodeString (NTDLL.@)
1840  *
1841  * Converts an unsigned integer to a '\0' terminated unicode string.
1842  *
1843  * RETURNS
1844  *  Success: STATUS_SUCCESS. str contains the converted number
1845  *  Failure: STATUS_INVALID_PARAMETER, if base is not 0, 2, 8, 10 or 16.
1846  *           STATUS_BUFFER_OVERFLOW, if str is too small to hold the string
1847  *                  (with the '\0' termination). In this case str->Length
1848  *                  is set to the length, the string would have (which can
1849  *                  be larger than the MaximumLength).
1850  *
1851  * NOTES
1852  *  Instead of base 0 it uses 10 as base.
1853  *  If str is NULL it crashes, as the native function does.
1854  *
1855  * DIFFERENCES
1856  *  Do not return STATUS_BUFFER_OVERFLOW when the string is long enough.
1857  *  The native function does this when the string would be longer than 16
1858  *  characters even when the string parameter is long enough.
1859  */
1860 NTSTATUS WINAPI RtlIntegerToUnicodeString(
1861     ULONG value,         /* [I] Value to be converted */
1862     ULONG base,          /* [I] Number base for conversion (allowed 0, 2, 8, 10 or 16) */
1863     UNICODE_STRING *str) /* [O] Destination for the converted value */
1864 {
1865     WCHAR buffer[33];
1866     PWCHAR pos;
1867     WCHAR digit;
1868
1869     if (base == 0) {
1870         base = 10;
1871     } else if (base != 2 && base != 8 && base != 10 && base != 16) {
1872         return STATUS_INVALID_PARAMETER;
1873     } /* if */
1874
1875     pos = &buffer[32];
1876     *pos = '\0';
1877
1878     do {
1879         pos--;
1880         digit = value % base;
1881         value = value / base;
1882         if (digit < 10) {
1883             *pos = '0' + digit;
1884         } else {
1885             *pos = 'A' + digit - 10;
1886         } /* if */
1887     } while (value != 0L);
1888
1889     str->Length = (&buffer[32] - pos) * sizeof(WCHAR);
1890     if (str->Length >= str->MaximumLength) {
1891         return STATUS_BUFFER_OVERFLOW;
1892     } else {
1893         memcpy(str->Buffer, pos, str->Length + sizeof(WCHAR));
1894     } /* if */
1895     return STATUS_SUCCESS;
1896 }
1897
1898
1899 /*************************************************************************
1900  * RtlGUIDFromString (NTDLL.@)
1901  *
1902  * Convert a string representation of a GUID into a GUID.
1903  *
1904  * PARAMS
1905  *  str  [I] String representation in the format "{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}"
1906  *  guid [O] Destination for the converted GUID
1907  *
1908  * RETURNS
1909  *  Success: STATUS_SUCCESS. guid contains the converted value.
1910  *  Failure: STATUS_INVALID_PARAMETER, if str is not in the expected format.
1911  *
1912  * SEE ALSO
1913  *  See RtlStringFromGUID.
1914  */
1915 NTSTATUS WINAPI RtlGUIDFromString(const UNICODE_STRING *str, GUID* guid)
1916 {
1917   int i = 0;
1918   const WCHAR *lpszCLSID = str->Buffer;
1919   BYTE* lpOut = (BYTE*)guid;
1920
1921   TRACE("(%s,%p)\n", debugstr_us(str), guid);
1922
1923   /* Convert string: {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
1924    * to memory:       DWORD... WORD WORD BYTES............
1925    */
1926   while (i < 37)
1927   {
1928     switch (i)
1929     {
1930     case 0:
1931       if (*lpszCLSID != '{')
1932         return STATUS_INVALID_PARAMETER;
1933       break;
1934
1935     case 9: case 14: case 19: case 24:
1936       if (*lpszCLSID != '-')
1937         return STATUS_INVALID_PARAMETER;
1938       break;
1939
1940     case 37:
1941       if (*lpszCLSID != '}')
1942         return STATUS_INVALID_PARAMETER;
1943       break;
1944
1945     default:
1946       {
1947         WCHAR ch = *lpszCLSID, ch2 = lpszCLSID[1];
1948         unsigned char byte;
1949
1950         /* Read two hex digits as a byte value */
1951         if      (ch >= '0' && ch <= '9') ch = ch - '0';
1952         else if (ch >= 'a' && ch <= 'f') ch = ch - 'a' + 10;
1953         else if (ch >= 'A' && ch <= 'F') ch = ch - 'A' + 10;
1954         else return STATUS_INVALID_PARAMETER;
1955
1956         if      (ch2 >= '0' && ch2 <= '9') ch2 = ch2 - '0';
1957         else if (ch2 >= 'a' && ch2 <= 'f') ch2 = ch2 - 'a' + 10;
1958         else if (ch2 >= 'A' && ch2 <= 'F') ch2 = ch2 - 'A' + 10;
1959         else return STATUS_INVALID_PARAMETER;
1960
1961         byte = ch << 4 | ch2;
1962
1963         switch (i)
1964         {
1965 #ifndef WORDS_BIGENDIAN
1966         /* For Big Endian machines, we store the data such that the
1967          * dword/word members can be read as DWORDS and WORDS correctly. */
1968         /* Dword */
1969         case 1:  lpOut[3] = byte; break;
1970         case 3:  lpOut[2] = byte; break;
1971         case 5:  lpOut[1] = byte; break;
1972         case 7:  lpOut[0] = byte; lpOut += 4;  break;
1973         /* Word */
1974         case 10: case 15: lpOut[1] = byte; break;
1975         case 12: case 17: lpOut[0] = byte; lpOut += 2; break;
1976 #endif
1977         /* Byte */
1978         default: lpOut[0] = byte; lpOut++; break;
1979         }
1980         lpszCLSID++; /* Skip 2nd character of byte */
1981         i++;
1982       }
1983     }
1984     lpszCLSID++;
1985     i++;
1986   }
1987
1988   return STATUS_SUCCESS;
1989 }
1990
1991 /*************************************************************************
1992  * RtlStringFromGUID (NTDLL.@)
1993  *
1994  * Convert a GUID into a string representation of a GUID.
1995  *
1996  * PARAMS
1997  *  guid [I] GUID to convert
1998  *  str  [O] Destination for the converted string
1999  *
2000  * RETURNS
2001  *  Success: STATUS_SUCCESS. str contains the converted value.
2002  *  Failure: STATUS_NO_MEMORY, if memory for str cannot be allocated.
2003  *
2004  * SEE ALSO
2005  *  See RtlGUIDFromString.
2006  */
2007 NTSTATUS WINAPI RtlStringFromGUID(const GUID* guid, UNICODE_STRING *str)
2008 {
2009   static const WCHAR szFormat[] = { '{','%','0','8','l','X','-',
2010     '%','0','4','X','-',  '%','0','4','X','-','%','0','2','X','%','0','2','X',
2011     '-',   '%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X',
2012     '%','0','2','X','%','0','2','X','}','\0' };
2013
2014   TRACE("(%p,%p)\n", guid, str);
2015
2016   str->Length = GUID_STRING_LENGTH * sizeof(WCHAR);
2017   str->MaximumLength = str->Length + sizeof(WCHAR);
2018   str->Buffer = (WCHAR*)RtlAllocateHeap(GetProcessHeap(), 0, str->MaximumLength);
2019   if (!str->Buffer)
2020   {
2021     str->Length = str->MaximumLength = 0;
2022     return STATUS_NO_MEMORY;
2023   }
2024   sprintfW(str->Buffer, szFormat, guid->Data1, guid->Data2, guid->Data3,
2025           guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
2026           guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7]);
2027
2028   return STATUS_SUCCESS;
2029 }