dlls/ntdll/rtlstr.c

   1 /*
   2  * Rtl string functions
   3  *
   4  * Copyright (C) 1996-1998 Marcus Meissner
   5  * Copyright (C) 2000      Alexandre Julliard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <assert.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <ctype.h>
  28
  29 #include "ntddk.h"
  30 #include "wine/unicode.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  34
  35 UINT NlsAnsiCodePage = 1252;
  36 BYTE NlsMbCodePageTag = 0;
  37 BYTE NlsMbOemCodePageTag = 0;
  38
  39 static const union cptable *ansi_table;
  40 static const union cptable *oem_table;
  41
  42 inline static const union cptable *get_ansi_table(void)
  43 {
  44     if (!ansi_table) ansi_table = cp_get_table( 1252 );
  45     return ansi_table;
  46 }
  47
  48 inline static const union cptable *get_oem_table(void)
  49 {
  50     if (!oem_table) oem_table = cp_get_table( 437 );
  51     return oem_table;
  52 }
  53
  54
  55 /**************************************************************************
  56  *      __wine_init_codepages   (NTDLL.@)
  57  *
  58  * Set the code page once kernel32 is loaded. Should be done differently.
  59  */
  60 void __wine_init_codepages( const union cptable *ansi, const union cptable *oem )
  61 {
  62     ansi_table = ansi;
  63     oem_table = oem;
  64     NlsAnsiCodePage = ansi->info.codepage;
  65 }
  66
  67
  68 /**************************************************************************
  69  *      RtlInitAnsiString   (NTDLL.@)
  70  */
  71 void WINAPI RtlInitAnsiString( PSTRING target, LPCSTR source)
  72 {
  73     if ((target->Buffer = (LPSTR)source))
  74     {
  75         target->Length = strlen(source);
  76         target->MaximumLength = target->Length + 1;
  77     }
  78     else target->Length = target->MaximumLength = 0;
  79 }
  80
  81
  82 /**************************************************************************
  83  *      RtlInitString   (NTDLL.@)
  84  */
  85 void WINAPI RtlInitString( PSTRING target, LPCSTR source )
  86 {
  87     RtlInitAnsiString( target, source );
  88 }
  89
  90
  91 /**************************************************************************
  92  *      RtlFreeAnsiString   (NTDLL.@)
  93  */
  94 void WINAPI RtlFreeAnsiString( PSTRING str )
  95 {
  96     if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
  97 }
  98
  99
 100 /**************************************************************************
 101  *      RtlFreeOemString   (NTDLL.@)
 102  */
 103 void WINAPI RtlFreeOemString( PSTRING str )
 104 {
 105     RtlFreeAnsiString( str );
 106 }
 107
 108
 109 /**************************************************************************
 110  *      RtlCopyString   (NTDLL.@)
 111  */
 112 void WINAPI RtlCopyString( STRING *dst, const STRING *src )
 113 {
 114     if (src)
 115     {
 116         unsigned int len = min( src->Length, dst->MaximumLength );
 117         memcpy( dst->Buffer, src->Buffer, len );
 118         dst->Length = len;
 119     }
 120     else dst->Length = 0;
 121 }
 122
 123
 124 /**************************************************************************
 125  *      RtlInitUnicodeString   (NTDLL.@)
 126  */
 127 void WINAPI RtlInitUnicodeString( PUNICODE_STRING target, LPCWSTR source )
 128 {
 129     if ((target->Buffer = (LPWSTR)source))
 130     {
 131         target->Length = strlenW(source) * sizeof(WCHAR);
 132         target->MaximumLength = target->Length + sizeof(WCHAR);
 133     }
 134     else target->Length = target->MaximumLength = 0;
 135 }
 136
 137
 138 /**************************************************************************
 139  *      RtlCreateUnicodeString   (NTDLL.@)
 140  */
 141 BOOLEAN WINAPI RtlCreateUnicodeString( PUNICODE_STRING target, LPCWSTR src )
 142 {
 143     int len = (strlenW(src) + 1) * sizeof(WCHAR);
 144     if (!(target->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return FALSE;
 145     memcpy( target->Buffer, src, len );
 146     target->MaximumLength = len;
 147     target->Length = len - sizeof(WCHAR);
 148     return TRUE;
 149 }
 150
 151
 152 /**************************************************************************
 153  *      RtlCreateUnicodeStringFromAsciiz   (NTDLL.@)
 154  */
 155 BOOLEAN WINAPI RtlCreateUnicodeStringFromAsciiz( PUNICODE_STRING target, LPCSTR src )
 156 {
 157     STRING ansi;
 158     RtlInitAnsiString( &ansi, src );
 159     return !RtlAnsiStringToUnicodeString( target, &ansi, TRUE );
 160 }
 161
 162
 163 /**************************************************************************
 164  *      RtlFreeUnicodeString   (NTDLL.@)
 165  */
 166 void WINAPI RtlFreeUnicodeString( PUNICODE_STRING str )
 167 {
 168     if (str->Buffer) RtlFreeHeap( GetProcessHeap(), 0, str->Buffer );
 169 }
 170
 171
 172 /**************************************************************************
 173  *      RtlCopyUnicodeString   (NTDLL.@)
 174  */
 175 void WINAPI RtlCopyUnicodeString( UNICODE_STRING *dst, const UNICODE_STRING *src )
 176 {
 177     if (src)
 178     {
 179         unsigned int len = min( src->Length, dst->MaximumLength );
 180         memcpy( dst->Buffer, src->Buffer, len );
 181         dst->Length = len;
 182         /* append terminating NULL if enough space */
 183         if (len < dst->MaximumLength) dst->Buffer[len / sizeof(WCHAR)] = 0;
 184     }
 185     else dst->Length = 0;
 186 }
 187
 188
 189 /**************************************************************************
 190  *      RtlEraseUnicodeString   (NTDLL.@)
 191  */
 192 void WINAPI RtlEraseUnicodeString( UNICODE_STRING *str )
 193 {
 194     if (str->Buffer)
 195     {
 196         memset( str->Buffer, 0, str->MaximumLength );
 197         str->Length = 0;
 198     }
 199 }
 200
 201 /*
 202     COMPARISON FUNCTIONS
 203 */
 204
 205 /******************************************************************************
 206  *      RtlCompareString   (NTDLL.@)
 207  */
 208 LONG WINAPI RtlCompareString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
 209 {
 210     unsigned int len;
 211     LONG ret = 0;
 212     LPCSTR p1, p2;
 213
 214     len = min(s1->Length, s2->Length);
 215     p1 = s1->Buffer;
 216     p2 = s2->Buffer;
 217
 218     if (CaseInsensitive)
 219     {
 220         while (!ret && len--) ret = toupper(*p1++) - toupper(*p2++);
 221     }
 222     else
 223     {
 224         while (!ret && len--) ret = *p1++ - *p2++;
 225     }
 226     if (!ret) ret = s1->Length - s2->Length;
 227     return ret;
 228 }
 229
 230
 231 /******************************************************************************
 232  *      RtlCompareUnicodeString   (NTDLL.@)
 233  */
 234 LONG WINAPI RtlCompareUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
 235                                      BOOLEAN CaseInsensitive )
 236 {
 237     unsigned int len;
 238     LONG ret = 0;
 239     LPCWSTR p1, p2;
 240
 241     len = min(s1->Length, s2->Length) / sizeof(WCHAR);
 242     p1 = s1->Buffer;
 243     p2 = s2->Buffer;
 244
 245     if (CaseInsensitive)
 246     {
 247         while (!ret && len--) ret = toupperW(*p1++) - toupperW(*p2++);
 248     }
 249     else
 250     {
 251         while (!ret && len--) ret = *p1++ - *p2++;
 252     }
 253     if (!ret) ret = s1->Length - s2->Length;
 254     return ret;
 255 }
 256
 257
 258 /**************************************************************************
 259  *      RtlEqualString   (NTDLL.@)
 260  */
 261 BOOLEAN WINAPI RtlEqualString( const STRING *s1, const STRING *s2, BOOLEAN CaseInsensitive )
 262 {
 263     if (s1->Length != s2->Length) return FALSE;
 264     return !RtlCompareString( s1, s2, CaseInsensitive );
 265 }
 266
 267
 268 /**************************************************************************
 269  *      RtlEqualUnicodeString   (NTDLL.@)
 270  */
 271 BOOLEAN WINAPI RtlEqualUnicodeString( const UNICODE_STRING *s1, const UNICODE_STRING *s2,
 272                                       BOOLEAN CaseInsensitive )
 273 {
 274     if (s1->Length != s2->Length) return FALSE;
 275     return !RtlCompareUnicodeString( s1, s2, CaseInsensitive );
 276 }
 277
 278
 279 /**************************************************************************
 280  *      RtlPrefixString   (NTDLL.@)
 281  *
 282  * Test if s1 is a prefix in s2
 283  */
 284 BOOLEAN WINAPI RtlPrefixString( const STRING *s1, const STRING *s2, BOOLEAN ignore_case )
 285 {
 286     unsigned int i;
 287
 288     if (s1->Length > s2->Length) return FALSE;
 289     if (ignore_case)
 290     {
 291         for (i = 0; i < s1->Length; i++)
 292             if (toupper(s1->Buffer[i]) != toupper(s2->Buffer[i])) return FALSE;
 293     }
 294     else
 295     {
 296         for (i = 0; i < s1->Length; i++)
 297             if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
 298     }
 299     return TRUE;
 300 }
 301
 302
 303 /**************************************************************************
 304  *      RtlPrefixUnicodeString   (NTDLL.@)
 305  *
 306  * Test if s1 is a prefix in s2
 307  */
 308 BOOLEAN WINAPI RtlPrefixUnicodeString( const UNICODE_STRING *s1,
 309                                        const UNICODE_STRING *s2,
 310                                        BOOLEAN ignore_case )
 311 {
 312     unsigned int i;
 313
 314     if (s1->Length > s2->Length) return FALSE;
 315     if (ignore_case)
 316     {
 317         for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
 318             if (toupper(s1->Buffer[i]) != toupper(s2->Buffer[i])) return FALSE;
 319     }
 320     else
 321     {
 322         for (i = 0; i < s1->Length / sizeof(WCHAR); i++)
 323             if (s1->Buffer[i] != s2->Buffer[i]) return FALSE;
 324     }
 325     return TRUE;
 326 }
 327
 328
 329 /*
 330         COPY BETWEEN ANSI_STRING or UNICODE_STRING
 331         there is no parameter checking, it just crashes
 332 */
 333
 334
 335 /**************************************************************************
 336  *      RtlAnsiStringToUnicodeString   (NTDLL.@)
 337  *
 338  * NOTES:
 339  *  writes terminating 0
 340  */
 341 NTSTATUS WINAPI RtlAnsiStringToUnicodeString( UNICODE_STRING *uni,
 342                                               const STRING *ansi,
 343                                               BOOLEAN doalloc )
 344 {
 345     DWORD total = RtlAnsiStringToUnicodeSize( ansi );
 346
 347     if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
 348     uni->Length = total - sizeof(WCHAR);
 349     if (doalloc)
 350     {
 351         uni->MaximumLength = total;
 352         if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total ))) return STATUS_NO_MEMORY;
 353     }
 354     else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 355
 356     RtlMultiByteToUnicodeN( uni->Buffer, uni->Length, NULL, ansi->Buffer, ansi->Length );
 357     uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
 358     return STATUS_SUCCESS;
 359 }
 360
 361
 362 /**************************************************************************
 363  *      RtlOemStringToUnicodeString   (NTDLL.@)
 364  *
 365  * NOTES
 366  *  writes terminating 0
 367  *  if resulting length > 0xffff it returns STATUS_INVALID_PARAMETER_2
 368  */
 369 NTSTATUS WINAPI RtlOemStringToUnicodeString( UNICODE_STRING *uni,
 370                                              const STRING *oem,
 371                                              BOOLEAN doalloc )
 372 {
 373     DWORD total = RtlOemStringToUnicodeSize( oem );
 374
 375     if (total > 0xffff) return STATUS_INVALID_PARAMETER_2;
 376     uni->Length = total - sizeof(WCHAR);
 377     if (doalloc)
 378     {
 379         uni->MaximumLength = total;
 380         if (!(uni->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, total ))) return STATUS_NO_MEMORY;
 381     }
 382     else if (total > uni->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 383
 384     RtlOemToUnicodeN( uni->Buffer, uni->Length, NULL, oem->Buffer, oem->Length );
 385     uni->Buffer[uni->Length / sizeof(WCHAR)] = 0;
 386     return STATUS_SUCCESS;
 387 }
 388
 389
 390 /**************************************************************************
 391  *      RtlUnicodeStringToAnsiString   (NTDLL.@)
 392  *
 393  * NOTES
 394  *  writes terminating 0
 395  *  copies a part if the buffer is too small
 396  */
 397 NTSTATUS WINAPI RtlUnicodeStringToAnsiString( STRING *ansi,
 398                                               const UNICODE_STRING *uni,
 399                                               BOOLEAN doalloc )
 400 {
 401     NTSTATUS ret = STATUS_SUCCESS;
 402     DWORD len = RtlUnicodeStringToAnsiSize( uni );
 403
 404     ansi->Length = len - 1;
 405     if (doalloc)
 406     {
 407         ansi->MaximumLength = len;
 408         if (!(ansi->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
 409     }
 410     else if (ansi->MaximumLength < len)
 411     {
 412         if (!ansi->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 413         ansi->Length = ansi->MaximumLength - 1;
 414         ret = STATUS_BUFFER_OVERFLOW;
 415     }
 416
 417     RtlUnicodeToMultiByteN( ansi->Buffer, ansi->Length, NULL, uni->Buffer, uni->Length );
 418     ansi->Buffer[ansi->Length] = 0;
 419     return ret;
 420 }
 421
 422
 423 /**************************************************************************
 424  *      RtlUnicodeStringToOemString   (NTDLL.@)
 425  *
 426  * NOTES
 427  *   allocates uni->Length+1
 428  *   writes terminating 0
 429  */
 430 NTSTATUS WINAPI RtlUnicodeStringToOemString( STRING *oem,
 431                                              const UNICODE_STRING *uni,
 432                                              BOOLEAN doalloc )
 433 {
 434     NTSTATUS ret = STATUS_SUCCESS;
 435     DWORD len = RtlUnicodeStringToOemSize( uni );
 436
 437     oem->Length = len - 1;
 438     if (doalloc)
 439     {
 440         oem->MaximumLength = len;
 441         if (!(oem->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
 442     }
 443     else if (oem->MaximumLength < len)
 444     {
 445         if (!oem->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 446         oem->Length = oem->MaximumLength - 1;
 447         ret = STATUS_BUFFER_OVERFLOW;
 448     }
 449
 450     RtlUnicodeToOemN( oem->Buffer, oem->Length, NULL, uni->Buffer, uni->Length );
 451     oem->Buffer[oem->Length] = 0;
 452     return ret;
 453 }
 454
 455
 456 /**************************************************************************
 457  *      RtlMultiByteToUnicodeN   (NTDLL.@)
 458  *
 459  * NOTES
 460  *  if unistr is too small a part is copied
 461  */
 462 NTSTATUS WINAPI RtlMultiByteToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
 463                                         LPCSTR src, DWORD srclen )
 464 {
 465
 466     int ret = cp_mbstowcs( get_ansi_table(), 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
 467     if (reslen)
 468         *reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
 469     return STATUS_SUCCESS;
 470 }
 471
 472
 473 /**************************************************************************
 474  *      RtlOemToUnicodeN   (NTDLL.@)
 475  */
 476 NTSTATUS WINAPI RtlOemToUnicodeN( LPWSTR dst, DWORD dstlen, LPDWORD reslen,
 477                                   LPCSTR src, DWORD srclen )
 478 {
 479     int ret = cp_mbstowcs( get_oem_table(), 0, src, srclen, dst, dstlen/sizeof(WCHAR) );
 480     if (reslen)
 481         *reslen = (ret >= 0) ? ret*sizeof(WCHAR) : dstlen; /* overflow -> we filled up to dstlen */
 482     return STATUS_SUCCESS;
 483 }
 484
 485
 486 /**************************************************************************
 487  *      RtlUnicodeToMultiByteN   (NTDLL.@)
 488  */
 489 NTSTATUS WINAPI RtlUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 490                                         LPCWSTR src, DWORD srclen )
 491 {
 492     int ret = cp_wcstombs( get_ansi_table(), 0, src, srclen / sizeof(WCHAR),
 493                            dst, dstlen, NULL, NULL );
 494     if (reslen)
 495         *reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
 496     return STATUS_SUCCESS;
 497 }
 498
 499
 500 /**************************************************************************
 501  *      RtlUnicodeToOemN   (NTDLL.@)
 502  */
 503 NTSTATUS WINAPI RtlUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 504                                   LPCWSTR src, DWORD srclen )
 505 {
 506     int ret = cp_wcstombs( get_oem_table(), 0, src, srclen / sizeof(WCHAR),
 507                            dst, dstlen, NULL, NULL );
 508     if (reslen)
 509         *reslen = (ret >= 0) ? ret : dstlen; /* overflow -> we filled up to dstlen */
 510     return STATUS_SUCCESS;
 511 }
 512
 513
 514 /*
 515      CASE CONVERSIONS
 516 */
 517
 518 /**************************************************************************
 519  *      RtlUpperString   (NTDLL.@)
 520  */
 521 void WINAPI RtlUpperString( STRING *dst, const STRING *src )
 522 {
 523     unsigned int i, len = min(src->Length, dst->MaximumLength);
 524
 525     for (i = 0; i < len; i++) dst->Buffer[i] = toupper(src->Buffer[i]);
 526     dst->Length = len;
 527 }
 528
 529
 530 /**************************************************************************
 531  *      RtlUpcaseUnicodeString   (NTDLL.@)
 532  *
 533  * NOTES:
 534  *  destination string is never 0-terminated because dest can be equal to src
 535  *  and src might be not 0-terminated
 536  *  dest.Length only set when success
 537  */
 538 NTSTATUS WINAPI RtlUpcaseUnicodeString( UNICODE_STRING *dest,
 539                                         const UNICODE_STRING *src,
 540                                         BOOLEAN doalloc )
 541 {
 542     DWORD i, len = src->Length;
 543
 544     if (doalloc)
 545     {
 546         dest->MaximumLength = len;
 547         if (!(dest->Buffer = RtlAllocateHeap( GetProcessHeap(), 0, len ))) return STATUS_NO_MEMORY;
 548     }
 549     else if (len > dest->MaximumLength) return STATUS_BUFFER_OVERFLOW;
 550
 551     for (i = 0; i < len/sizeof(WCHAR); i++) dest->Buffer[i] = toupperW(src->Buffer[i]);
 552     dest->Length = len;
 553     return STATUS_SUCCESS;
 554 }
 555
 556
 557 /**************************************************************************
 558  *      RtlUpcaseUnicodeStringToAnsiString   (NTDLL.@)
 559  *
 560  * NOTES
 561  *  writes terminating 0
 562  */
 563 NTSTATUS WINAPI RtlUpcaseUnicodeStringToAnsiString( STRING *dst,
 564                                                     const UNICODE_STRING *src,
 565                                                     BOOLEAN doalloc )
 566 {
 567     NTSTATUS ret;
 568     UNICODE_STRING upcase;
 569
 570     if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
 571     {
 572         ret = RtlUnicodeStringToAnsiString( dst, &upcase, doalloc );
 573         RtlFreeUnicodeString( &upcase );
 574     }
 575     return ret;
 576 }
 577
 578
 579 /**************************************************************************
 580  *      RtlUpcaseUnicodeStringToOemString   (NTDLL.@)
 581  *
 582  * NOTES
 583  *  writes terminating 0
 584  */
 585 NTSTATUS WINAPI RtlUpcaseUnicodeStringToOemString( STRING *dst,
 586                                                    const UNICODE_STRING *src,
 587                                                    BOOLEAN doalloc )
 588 {
 589     NTSTATUS ret;
 590     UNICODE_STRING upcase;
 591
 592     if (!(ret = RtlUpcaseUnicodeString( &upcase, src, TRUE )))
 593     {
 594         ret = RtlUnicodeStringToOemString( dst, &upcase, doalloc );
 595         RtlFreeUnicodeString( &upcase );
 596     }
 597     return ret;
 598 }
 599
 600
 601 /**************************************************************************
 602  *      RtlUpcaseUnicodeToMultiByteN   (NTDLL.@)
 603  */
 604 NTSTATUS WINAPI RtlUpcaseUnicodeToMultiByteN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 605                                               LPCWSTR src, DWORD srclen )
 606 {
 607     NTSTATUS ret;
 608     LPWSTR upcase;
 609     DWORD i;
 610
 611     if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
 612     for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
 613     ret = RtlUnicodeToMultiByteN( dst, dstlen, reslen, upcase, srclen );
 614     RtlFreeHeap( GetProcessHeap(), 0, upcase );
 615     return ret;
 616 }
 617
 618
 619 /**************************************************************************
 620  *      RtlUpcaseUnicodeToOemN   (NTDLL.@)
 621  */
 622 NTSTATUS WINAPI RtlUpcaseUnicodeToOemN( LPSTR dst, DWORD dstlen, LPDWORD reslen,
 623                                         LPCWSTR src, DWORD srclen )
 624 {
 625     NTSTATUS ret;
 626     LPWSTR upcase;
 627     DWORD i;
 628
 629     if (!(upcase = RtlAllocateHeap( GetProcessHeap(), 0, srclen ))) return STATUS_NO_MEMORY;
 630     for (i = 0; i < srclen/sizeof(WCHAR); i++) upcase[i] = toupperW(src[i]);
 631     ret = RtlUnicodeToOemN( dst, dstlen, reslen, upcase, srclen );
 632     RtlFreeHeap( GetProcessHeap(), 0, upcase );
 633     return ret;
 634 }
 635
 636
 637 /*
 638         STRING SIZE
 639 */
 640
 641 /**************************************************************************
 642  *      RtlOemStringToUnicodeSize   (NTDLL.@)
 643  *      RtlxOemStringToUnicodeSize  (NTDLL.@)
 644  *
 645  * Return the size in bytes necessary for the Unicode conversion of 'str',
 646  * including the terminating NULL.
 647  */
 648 UINT WINAPI RtlOemStringToUnicodeSize( const STRING *str )
 649 {
 650     int ret = cp_mbstowcs( get_oem_table(), 0, str->Buffer, str->Length, NULL, 0 );
 651     return (ret + 1) * sizeof(WCHAR);
 652 }
 653
 654
 655 /**************************************************************************
 656  *      RtlAnsiStringToUnicodeSize   (NTDLL.@)
 657  *      RtlxAnsiStringToUnicodeSize  (NTDLL.@)
 658  *
 659  * Return the size in bytes necessary for the Unicode conversion of 'str',
 660  * including the terminating NULL.
 661  */
 662 DWORD WINAPI RtlAnsiStringToUnicodeSize( const STRING *str )
 663 {
 664     DWORD ret;
 665     RtlMultiByteToUnicodeSize( &ret, str->Buffer, str->Length );
 666     return ret + sizeof(WCHAR);
 667 }
 668
 669
 670 /**************************************************************************
 671  *      RtlMultiByteToUnicodeSize   (NTDLL.@)
 672  *
 673  * Compute the size in bytes necessary for the Unicode conversion of 'str',
 674  * without the terminating NULL.
 675  */
 676 NTSTATUS WINAPI RtlMultiByteToUnicodeSize( DWORD *size, LPCSTR str, UINT len )
 677 {
 678     *size = cp_mbstowcs( get_ansi_table(), 0, str, len, NULL, 0 ) * sizeof(WCHAR);
 679     return STATUS_SUCCESS;
 680 }
 681
 682
 683 /**************************************************************************
 684  *      RtlUnicodeToMultiByteSize   (NTDLL.@)
 685  *
 686  * Compute the size necessary for the multibyte conversion of 'str',
 687  * without the terminating NULL.
 688  */
 689 NTSTATUS WINAPI RtlUnicodeToMultiByteSize( DWORD *size, LPCWSTR str, UINT len )
 690 {
 691     *size = cp_wcstombs( get_ansi_table(), 0, str, len / sizeof(WCHAR), NULL, 0, NULL, NULL );
 692     return STATUS_SUCCESS;
 693 }
 694
 695
 696 /**************************************************************************
 697  *      RtlUnicodeStringToAnsiSize   (NTDLL.@)
 698  *      RtlxUnicodeStringToAnsiSize  (NTDLL.@)
 699  *
 700  * Return the size in bytes necessary for the Ansi conversion of 'str',
 701  * including the terminating NULL.
 702  */
 703 DWORD WINAPI RtlUnicodeStringToAnsiSize( const UNICODE_STRING *str )
 704 {
 705     DWORD ret;
 706     RtlUnicodeToMultiByteSize( &ret, str->Buffer, str->Length );
 707     return ret + 1;
 708 }
 709
 710
 711 /**************************************************************************
 712  *      RtlUnicodeStringToOemSize   (NTDLL.@)
 713  *      RtlxUnicodeStringToOemSize  (NTDLL.@)
 714  *
 715  * Return the size in bytes necessary for the OEM conversion of 'str',
 716  * including the terminating NULL.
 717  */
 718 DWORD WINAPI RtlUnicodeStringToOemSize( const UNICODE_STRING *str )
 719 {
 720     return cp_wcstombs( get_oem_table(), 0, str->Buffer, str->Length / sizeof(WCHAR),
 721                         NULL, 0, NULL, NULL ) + 1;
 722 }
 723
 724
 725 /**************************************************************************
 726  *      RtlAppendStringToString   (NTDLL.@)
 727  */
 728 NTSTATUS WINAPI RtlAppendStringToString( STRING *dst, const STRING *src )
 729 {
 730     unsigned int len = src->Length + dst->Length;
 731     if (len > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
 732     memcpy( dst->Buffer + dst->Length, src->Buffer, src->Length );
 733     dst->Length = len;
 734     return STATUS_SUCCESS;
 735 }
 736
 737
 738 /**************************************************************************
 739  *      RtlAppendAsciizToString   (NTDLL.@)
 740  */
 741 NTSTATUS WINAPI RtlAppendAsciizToString( STRING *dst, LPCSTR src )
 742 {
 743     if (src)
 744     {
 745         unsigned int srclen = strlen(src);
 746         unsigned int total  = srclen + dst->Length;
 747         if (total > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
 748         memcpy( dst->Buffer + dst->Length, src, srclen );
 749         dst->Length = total;
 750     }
 751     return STATUS_SUCCESS;
 752 }
 753
 754
 755 /**************************************************************************
 756  *      RtlAppendUnicodeToString   (NTDLL.@)
 757  */
 758 NTSTATUS WINAPI RtlAppendUnicodeToString( UNICODE_STRING *dst, LPCWSTR src )
 759 {
 760     if (src)
 761     {
 762         unsigned int srclen = strlenW(src) * sizeof(WCHAR);
 763         unsigned int total  = srclen + dst->Length;
 764         if (total > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
 765         memcpy( dst->Buffer + dst->Length/sizeof(WCHAR), src, srclen );
 766         dst->Length = total;
 767         /* append terminating NULL if enough space */
 768         if (total < dst->MaximumLength) dst->Buffer[total / sizeof(WCHAR)] = 0;
 769     }
 770     return STATUS_SUCCESS;
 771 }
 772
 773
 774 /**************************************************************************
 775  *      RtlAppendUnicodeStringToString   (NTDLL.@)
 776  */
 777 NTSTATUS WINAPI RtlAppendUnicodeStringToString( UNICODE_STRING *dst, const UNICODE_STRING *src )
 778 {
 779     unsigned int len = src->Length + dst->Length;
 780     if (len > dst->MaximumLength) return STATUS_BUFFER_TOO_SMALL;
 781     memcpy( dst->Buffer + dst->Length/sizeof(WCHAR), src->Buffer, src->Length );
 782     dst->Length = len;
 783     /* append terminating NULL if enough space */
 784     if (len < dst->MaximumLength) dst->Buffer[len / sizeof(WCHAR)] = 0;
 785     return STATUS_SUCCESS;
 786 }
 787
 788
 789 /*
 790         MISC
 791 */
 792
 793 /**************************************************************************
 794  *      RtlIsTextUnicode (NTDLL.@)
 795  *
 796  *      Apply various feeble heuristics to guess whether
 797  *      the text buffer contains Unicode.
 798  *      FIXME: should implement more tests.
 799  */
 800 DWORD WINAPI RtlIsTextUnicode(
 801         LPVOID buf,
 802         DWORD len,
 803         DWORD *pf)
 804 {
 805         LPWSTR s = buf;
 806         DWORD flags = -1, out_flags = 0;
 807
 808         if (!len)
 809                 goto out;
 810         if (pf)
 811                 flags = *pf;
 812         /*
 813          * Apply various tests to the text string. According to the
 814          * docs, each test "passed" sets the corresponding flag in
 815          * the output flags. But some of the tests are mutually
 816          * exclusive, so I don't see how you could pass all tests ...
 817          */
 818
 819         /* Check for an odd length ... pass if even. */
 820         if (!(len & 1))
 821                 out_flags |= IS_TEXT_UNICODE_ODD_LENGTH;
 822
 823         /* Check for the special unicode marker byte. */
 824         if (*s == 0xFEFF)
 825                 out_flags |= IS_TEXT_UNICODE_SIGNATURE;
 826
 827         /*
 828          * Check whether the string passed all of the tests.
 829          */
 830         flags &= ITU_IMPLEMENTED_TESTS;
 831         if ((out_flags & flags) != flags)
 832                 len = 0;
 833 out:
 834         if (pf)
 835                 *pf = out_flags;
 836         return len;
 837 }