source3/lib/util_unistr.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-2001
   5    Copyright (C) Simo Sorce 2001
   6    Copyright (C) Jeremy Allison 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program 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
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 #ifndef MAXUNI
  25 #define MAXUNI 1024
  26 #endif
  27
  28 /* these 3 tables define the unicode case handling.  They are loaded
  29    at startup either via mmap() or read() from the lib directory */
  30 static smb_ucs2_t *upcase_table;
  31 static smb_ucs2_t *lowcase_table;
  32 static uint8 *valid_table;
  33 static BOOL upcase_table_use_unmap;
  34 static BOOL lowcase_table_use_unmap;
  35 static BOOL valid_table_use_unmap;
  36
  37 /**
  38  * This table says which Unicode characters are valid dos
  39  * characters.
  40  *
  41  * Each value is just a single bit.
  42  **/
  43 static uint8 doschar_table[8192]; /* 65536 characters / 8 bits/byte */
  44
  45 /**
  46  * Destroy global objects allocated by load_case_tables()
  47  **/
  48 void gfree_case_tables(void)
  49 {
  50         if ( upcase_table ) {
  51                 if ( upcase_table_use_unmap )
  52                         unmap_file(upcase_table, 0x20000);
  53                 else
  54                         SAFE_FREE(upcase_table);
  55         }
  56
  57         if ( lowcase_table ) {
  58                 if ( lowcase_table_use_unmap )
  59                         unmap_file(lowcase_table, 0x20000);
  60                 else
  61                         SAFE_FREE(lowcase_table);
  62         }
  63
  64         if ( valid_table ) {
  65                 if ( valid_table_use_unmap )
  66                         unmap_file(valid_table, 0x10000);
  67                 else
  68                         SAFE_FREE(valid_table);
  69         }
  70 }
  71
  72 /**
  73  * Load or generate the case handling tables.
  74  *
  75  * The case tables are defined in UCS2 and don't depend on any
  76  * configured parameters, so they never need to be reloaded.
  77  **/
  78
  79 void load_case_tables(void)
  80 {
  81         static int initialised;
  82         char *old_locale = NULL, *saved_locale = NULL;
  83         int i;
  84
  85         if (initialised) {
  86                 return;
  87         }
  88         initialised = 1;
  89
  90         upcase_table = (smb_ucs2_t *)map_file(lib_path("upcase.dat"),
  91                                               0x20000);
  92         upcase_table_use_unmap = ( upcase_table != NULL );
  93
  94         lowcase_table = (smb_ucs2_t *)map_file(lib_path("lowcase.dat"),
  95                                                0x20000);
  96         lowcase_table_use_unmap = ( lowcase_table != NULL );
  97
  98 #ifdef HAVE_SETLOCALE
  99         /* Get the name of the current locale.  */
 100         old_locale = setlocale(LC_ALL, NULL);
 101
 102         if (old_locale) {
 103                 /* Save it as it is in static storage. */
 104                 saved_locale = SMB_STRDUP(old_locale);
 105         }
 106
 107         /* We set back the locale to C to get ASCII-compatible toupper/lower functions. */
 108         setlocale(LC_ALL, "C");
 109 #endif
 110
 111         /* we would like Samba to limp along even if these tables are
 112            not available */
 113         if (!upcase_table) {
 114                 DEBUG(1,("creating lame upcase table\n"));
 115                 upcase_table = (smb_ucs2_t *)SMB_MALLOC(0x20000);
 116                 for (i=0;i<0x10000;i++) {
 117                         smb_ucs2_t v;
 118                         SSVAL(&v, 0, i);
 119                         upcase_table[v] = i;
 120                 }
 121                 for (i=0;i<256;i++) {
 122                         smb_ucs2_t v;
 123                         SSVAL(&v, 0, UCS2_CHAR(i));
 124                         upcase_table[v] = UCS2_CHAR(islower(i)?toupper(i):i);
 125                 }
 126         }
 127
 128         if (!lowcase_table) {
 129                 DEBUG(1,("creating lame lowcase table\n"));
 130                 lowcase_table = (smb_ucs2_t *)SMB_MALLOC(0x20000);
 131                 for (i=0;i<0x10000;i++) {
 132                         smb_ucs2_t v;
 133                         SSVAL(&v, 0, i);
 134                         lowcase_table[v] = i;
 135                 }
 136                 for (i=0;i<256;i++) {
 137                         smb_ucs2_t v;
 138                         SSVAL(&v, 0, UCS2_CHAR(i));
 139                         lowcase_table[v] = UCS2_CHAR(isupper(i)?tolower(i):i);
 140                 }
 141         }
 142
 143 #ifdef HAVE_SETLOCALE
 144         /* Restore the old locale. */
 145         if (saved_locale) {
 146                 setlocale (LC_ALL, saved_locale);
 147                 SAFE_FREE(saved_locale);
 148         }
 149 #endif
 150 }
 151
 152 /*
 153   see if a ucs2 character can be mapped correctly to a dos character
 154   and mapped back to the same character in ucs2
 155 */
 156
 157 int check_dos_char(smb_ucs2_t c)
 158 {
 159         lazy_initialize_conv();
 160
 161         /* Find the right byte, and right bit within the byte; return
 162          * 1 or 0 */
 163         return (doschar_table[(c & 0xffff) / 8] & (1 << (c & 7))) != 0;
 164 }
 165
 166
 167 static int check_dos_char_slowly(smb_ucs2_t c)
 168 {
 169         char buf[10];
 170         smb_ucs2_t c2 = 0;
 171         int len1, len2;
 172
 173         len1 = convert_string(CH_UTF16LE, CH_DOS, &c, 2, buf, sizeof(buf),False);
 174         if (len1 == 0) {
 175                 return 0;
 176         }
 177         len2 = convert_string(CH_DOS, CH_UTF16LE, buf, len1, &c2, 2,False);
 178         if (len2 != 2) {
 179                 return 0;
 180         }
 181         return (c == c2);
 182 }
 183
 184
 185 /**
 186  * Fill out doschar table the hard way, by examining each character
 187  **/
 188
 189 void init_doschar_table(void)
 190 {
 191         int i, j, byteval;
 192
 193         /* For each byte of packed table */
 194
 195         for (i = 0; i <= 0xffff; i += 8) {
 196                 byteval = 0;
 197                 for (j = 0; j <= 7; j++) {
 198                         smb_ucs2_t c;
 199
 200                         c = i + j;
 201
 202                         if (check_dos_char_slowly(c)) {
 203                                 byteval |= 1 << j;
 204                         }
 205                 }
 206                 doschar_table[i/8] = byteval;
 207         }
 208 }
 209
 210
 211 /**
 212  * Load the valid character map table from <tt>valid.dat</tt> or
 213  * create from the configured codepage.
 214  *
 215  * This function is called whenever the configuration is reloaded.
 216  * However, the valid character table is not changed if it's loaded
 217  * from a file, because we can't unmap files.
 218  **/
 219
 220 void init_valid_table(void)
 221 {
 222         static int mapped_file;
 223         int i;
 224         const char *allowed = ".!#$%&'()_-@^`~";
 225         uint8 *valid_file;
 226
 227         if (mapped_file) {
 228                 /* Can't unmap files, so stick with what we have */
 229                 return;
 230         }
 231
 232         valid_file = (uint8 *)map_file(lib_path("valid.dat"), 0x10000);
 233         if (valid_file) {
 234                 valid_table = valid_file;
 235                 mapped_file = 1;
 236                 valid_table_use_unmap = True;
 237                 return;
 238         }
 239
 240         /* Otherwise, we're using a dynamically created valid_table.
 241          * It might need to be regenerated if the code page changed.
 242          * We know that we're not using a mapped file, so we can
 243          * free() the old one. */
 244         if (valid_table)
 245                 SAFE_FREE(valid_table);
 246
 247         /* use free rather than unmap */
 248         valid_table_use_unmap = False;
 249
 250         DEBUG(2,("creating default valid table\n"));
 251         valid_table = (uint8 *)SMB_MALLOC(0x10000);
 252         for (i=0;i<128;i++) {
 253                 valid_table[i] = isalnum(i) || strchr(allowed,i);
 254         }
 255
 256         for (;i<0x10000;i++) {
 257                 smb_ucs2_t c;
 258                 SSVAL(&c, 0, i);
 259                 valid_table[i] = check_dos_char(c);
 260         }
 261 }
 262
 263 /*******************************************************************
 264  Write a string in (little-endian) unicode format. src is in
 265  the current DOS codepage. len is the length in bytes of the
 266  string pointed to by dst.
 267
 268  if null_terminate is True then null terminate the packet (adds 2 bytes)
 269
 270  the return value is the length in bytes consumed by the string, including the
 271  null termination if applied
 272 ********************************************************************/
 273
 274 size_t dos_PutUniCode(char *dst,const char *src, size_t len, BOOL null_terminate)
 275 {
 276         int flags = null_terminate ? STR_UNICODE|STR_NOALIGN|STR_TERMINATE
 277                                    : STR_UNICODE|STR_NOALIGN;
 278         return push_ucs2(NULL, dst, src, len, flags);
 279 }
 280
 281
 282 /*******************************************************************
 283  Skip past a unicode string, but not more than len. Always move
 284  past a terminating zero if found.
 285 ********************************************************************/
 286
 287 char *skip_unibuf(char *src, size_t len)
 288 {
 289         char *srcend = src + len;
 290
 291         while (src < srcend && SVAL(src,0)) {
 292                 src += 2;
 293         }
 294
 295         if(!SVAL(src,0)) {
 296                 src += 2;
 297         }
 298
 299         return src;
 300 }
 301
 302 /* Copy a string from little-endian or big-endian unicode source (depending
 303  * on flags) to internal samba format destination
 304  */
 305
 306 int rpcstr_pull(char* dest, void *src, int dest_len, int src_len, int flags)
 307 {
 308         if (!src) {
 309                 dest[0] = 0;
 310                 return 0;
 311         }
 312         if(dest_len==-1) {
 313                 dest_len=MAXUNI-3;
 314         }
 315         return pull_ucs2(NULL, dest, src, dest_len, src_len, flags|STR_UNICODE|STR_NOALIGN);
 316 }
 317
 318 /* Copy a string from a unistr2 source to internal samba format
 319    destination.  Use this instead of direct calls to rpcstr_pull() to avoid
 320    having to determine whether the source string is null terminated. */
 321
 322 int rpcstr_pull_unistr2_fstring(char *dest, UNISTR2 *src)
 323 {
 324         return pull_ucs2(NULL, dest, src->buffer, sizeof(fstring),
 325                          src->uni_str_len * 2, 0);
 326 }
 327
 328 /* Helper function to return a talloc'ed string. I have implemented it with a
 329  * copy because I don't really know how pull_ucs2 and friends calculate the
 330  * target size. If this turns out to be a major bottleneck someone with deeper
 331  * multi-byte knowledge needs to revisit this.
 332  * My (VL) use is dsr_getdcname, which returns 6 strings, the alternative would
 333  * have been to manually talloc_strdup them in rpc_client/cli_netlogon.c.
 334  */
 335
 336 char *rpcstr_pull_unistr2_talloc(TALLOC_CTX *mem_ctx, const UNISTR2 *src)
 337 {
 338         pstring tmp;
 339         size_t result;
 340
 341         result = pull_ucs2(NULL, tmp, src->buffer, sizeof(tmp),
 342                            src->uni_str_len * 2, 0);
 343         if (result == (size_t)-1) {
 344                 return NULL;
 345         }
 346
 347         return talloc_strdup(mem_ctx, tmp);
 348 }
 349
 350 /* Converts a string from internal samba format to unicode
 351  */
 352
 353 int rpcstr_push(void* dest, const char *src, size_t dest_len, int flags)
 354 {
 355         return push_ucs2(NULL, dest, src, dest_len, flags|STR_UNICODE|STR_NOALIGN);
 356 }
 357
 358 /*******************************************************************
 359  Convert a (little-endian) UNISTR2 structure to an ASCII string.
 360 ********************************************************************/
 361
 362 void unistr2_to_ascii(char *dest, const UNISTR2 *str, size_t maxlen)
 363 {
 364         if ((str == NULL) || (str->uni_str_len == 0)) {
 365                 *dest='\0';
 366                 return;
 367         }
 368         pull_ucs2(NULL, dest, str->buffer, maxlen, str->uni_str_len*2, STR_NOALIGN);
 369 }
 370
 371 /*******************************************************************
 372  Convert a (little-endian) UNISTR3 structure to an ASCII string.
 373 ********************************************************************/
 374
 375 void unistr3_to_ascii(char *dest, const UNISTR3 *str, size_t maxlen)
 376 {
 377         if ((str == NULL) || (str->uni_str_len == 0)) {
 378                 *dest='\0';
 379                 return;
 380         }
 381         pull_ucs2(NULL, dest, str->str.buffer, maxlen, str->uni_str_len*2,
 382                   STR_NOALIGN);
 383 }
 384
 385 /*******************************************************************
 386  Give a static string for displaying a UNISTR2.
 387 ********************************************************************/
 388
 389 const char *unistr2_static(const UNISTR2 *str)
 390 {
 391         static pstring ret;
 392         unistr2_to_ascii(ret, str, sizeof(ret));
 393         return ret;
 394 }
 395
 396 /*******************************************************************
 397  Duplicate a UNISTR2 string into a null terminated char*
 398  using a talloc context.
 399 ********************************************************************/
 400
 401 char *unistr2_tdup(TALLOC_CTX *ctx, const UNISTR2 *str)
 402 {
 403         char *s;
 404         int maxlen = (str->uni_str_len+1)*4;
 405         if (!str->buffer) {
 406                 return NULL;
 407         }
 408         s = (char *)TALLOC(ctx, maxlen); /* convervative */
 409         if (!s) {
 410                 return NULL;
 411         }
 412         pull_ucs2(NULL, s, str->buffer, maxlen, str->uni_str_len*2, STR_NOALIGN);
 413         return s;
 414 }
 415
 416 /*******************************************************************
 417  Convert a wchar to upper case.
 418 ********************************************************************/
 419
 420 smb_ucs2_t toupper_w(smb_ucs2_t val)
 421 {
 422         return upcase_table[SVAL(&val,0)];
 423 }
 424
 425 /*******************************************************************
 426  Convert a wchar to lower case.
 427 ********************************************************************/
 428
 429 smb_ucs2_t tolower_w( smb_ucs2_t val )
 430 {
 431         return lowcase_table[SVAL(&val,0)];
 432 }
 433
 434 /*******************************************************************
 435  Determine if a character is lowercase.
 436 ********************************************************************/
 437
 438 BOOL islower_w(smb_ucs2_t c)
 439 {
 440         return upcase_table[SVAL(&c,0)] != c;
 441 }
 442
 443 /*******************************************************************
 444  Determine if a character is uppercase.
 445 ********************************************************************/
 446
 447 BOOL isupper_w(smb_ucs2_t c)
 448 {
 449         return lowcase_table[SVAL(&c,0)] != c;
 450 }
 451
 452 /*******************************************************************
 453  Determine if a character is valid in a 8.3 name.
 454 ********************************************************************/
 455
 456 BOOL isvalid83_w(smb_ucs2_t c)
 457 {
 458         return valid_table[SVAL(&c,0)] != 0;
 459 }
 460
 461 /*******************************************************************
 462  Count the number of characters in a smb_ucs2_t string.
 463 ********************************************************************/
 464
 465 size_t strlen_w(const smb_ucs2_t *src)
 466 {
 467         size_t len;
 468         smb_ucs2_t c;
 469
 470         for(len = 0; *(COPY_UCS2_CHAR(&c,src)); src++, len++) {
 471                 ;
 472         }
 473
 474         return len;
 475 }
 476
 477 /*******************************************************************
 478  Count up to max number of characters in a smb_ucs2_t string.
 479 ********************************************************************/
 480
 481 size_t strnlen_w(const smb_ucs2_t *src, size_t max)
 482 {
 483         size_t len;
 484         smb_ucs2_t c;
 485
 486         for(len = 0; (len < max) && *(COPY_UCS2_CHAR(&c,src)); src++, len++) {
 487                 ;
 488         }
 489
 490         return len;
 491 }
 492
 493 /*******************************************************************
 494  Wide strchr().
 495 ********************************************************************/
 496
 497 smb_ucs2_t *strchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
 498 {
 499         smb_ucs2_t cp;
 500         while (*(COPY_UCS2_CHAR(&cp,s))) {
 501                 if (c == cp) {
 502                         return (smb_ucs2_t *)s;
 503                 }
 504                 s++;
 505         }
 506         if (c == cp) {
 507                 return (smb_ucs2_t *)s;
 508         }
 509
 510         return NULL;
 511 }
 512
 513 smb_ucs2_t *strchr_wa(const smb_ucs2_t *s, char c)
 514 {
 515         return strchr_w(s, UCS2_CHAR(c));
 516 }
 517
 518 /*******************************************************************
 519  Wide strrchr().
 520 ********************************************************************/
 521
 522 smb_ucs2_t *strrchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
 523 {
 524         smb_ucs2_t cp;
 525         const smb_ucs2_t *p = s;
 526         int len = strlen_w(s);
 527
 528         if (len == 0) {
 529                 return NULL;
 530         }
 531         p += (len - 1);
 532         do {
 533                 if (c == *(COPY_UCS2_CHAR(&cp,p))) {
 534                         return (smb_ucs2_t *)p;
 535                 }
 536         } while (p-- != s);
 537         return NULL;
 538 }
 539
 540 /*******************************************************************
 541  Wide version of strrchr that returns after doing strrchr 'n' times.
 542 ********************************************************************/
 543
 544 smb_ucs2_t *strnrchr_w(const smb_ucs2_t *s, smb_ucs2_t c, unsigned int n)
 545 {
 546         smb_ucs2_t cp;
 547         const smb_ucs2_t *p = s;
 548         int len = strlen_w(s);
 549
 550         if (len == 0 || !n) {
 551                 return NULL;
 552         }
 553         p += (len - 1);
 554         do {
 555                 if (c == *(COPY_UCS2_CHAR(&cp,p))) {
 556                         n--;
 557                 }
 558
 559                 if (!n) {
 560                         return (smb_ucs2_t *)p;
 561                 }
 562         } while (p-- != s);
 563         return NULL;
 564 }
 565
 566 /*******************************************************************
 567  Wide strstr().
 568 ********************************************************************/
 569
 570 smb_ucs2_t *strstr_w(const smb_ucs2_t *s, const smb_ucs2_t *ins)
 571 {
 572         smb_ucs2_t *r;
 573         size_t inslen;
 574
 575         if (!s || !*s || !ins || !*ins) {
 576                 return NULL;
 577         }
 578
 579         inslen = strlen_w(ins);
 580         r = (smb_ucs2_t *)s;
 581
 582         while ((r = strchr_w(r, *ins))) {
 583                 if (strncmp_w(r, ins, inslen) == 0) {
 584                         return r;
 585                 }
 586                 r++;
 587         }
 588
 589         return NULL;
 590 }
 591
 592 /*******************************************************************
 593  Convert a string to lower case.
 594  return True if any char is converted
 595 ********************************************************************/
 596
 597 BOOL strlower_w(smb_ucs2_t *s)
 598 {
 599         smb_ucs2_t cp;
 600         BOOL ret = False;
 601
 602         while (*(COPY_UCS2_CHAR(&cp,s))) {
 603                 smb_ucs2_t v = tolower_w(cp);
 604                 if (v != cp) {
 605                         COPY_UCS2_CHAR(s,&v);
 606                         ret = True;
 607                 }
 608                 s++;
 609         }
 610         return ret;
 611 }
 612
 613 /*******************************************************************
 614  Convert a string to upper case.
 615  return True if any char is converted
 616 ********************************************************************/
 617
 618 BOOL strupper_w(smb_ucs2_t *s)
 619 {
 620         smb_ucs2_t cp;
 621         BOOL ret = False;
 622         while (*(COPY_UCS2_CHAR(&cp,s))) {
 623                 smb_ucs2_t v = toupper_w(cp);
 624                 if (v != cp) {
 625                         COPY_UCS2_CHAR(s,&v);
 626                         ret = True;
 627                 }
 628                 s++;
 629         }
 630         return ret;
 631 }
 632
 633 /*******************************************************************
 634  Convert a string to "normal" form.
 635 ********************************************************************/
 636
 637 void strnorm_w(smb_ucs2_t *s, int case_default)
 638 {
 639         if (case_default == CASE_UPPER) {
 640                 strupper_w(s);
 641         } else {
 642                 strlower_w(s);
 643         }
 644 }
 645
 646 int strcmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b)
 647 {
 648         smb_ucs2_t cpa, cpb;
 649
 650         while ((*(COPY_UCS2_CHAR(&cpb,b))) && (*(COPY_UCS2_CHAR(&cpa,a)) == cpb)) {
 651                 a++;
 652                 b++;
 653         }
 654         return (*(COPY_UCS2_CHAR(&cpa,a)) - *(COPY_UCS2_CHAR(&cpb,b)));
 655         /* warning: if *a != *b and both are not 0 we return a random
 656                 greater or lesser than 0 number not realted to which
 657                 string is longer */
 658 }
 659
 660 int strncmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b, size_t len)
 661 {
 662         smb_ucs2_t cpa, cpb;
 663         size_t n = 0;
 664
 665         while ((n < len) && (*(COPY_UCS2_CHAR(&cpb,b))) && (*(COPY_UCS2_CHAR(&cpa,a)) == cpb)) {
 666                 a++;
 667                 b++;
 668                 n++;
 669         }
 670         return (len - n)?(*(COPY_UCS2_CHAR(&cpa,a)) - *(COPY_UCS2_CHAR(&cpb,b))):0;
 671 }
 672
 673 /*******************************************************************
 674  Case insensitive string comparison.
 675 ********************************************************************/
 676
 677 int strcasecmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b)
 678 {
 679         smb_ucs2_t cpa, cpb;
 680
 681         while ((*COPY_UCS2_CHAR(&cpb,b)) && toupper_w(*(COPY_UCS2_CHAR(&cpa,a))) == toupper_w(cpb)) {
 682                 a++;
 683                 b++;
 684         }
 685         return (tolower_w(*(COPY_UCS2_CHAR(&cpa,a))) - tolower_w(*(COPY_UCS2_CHAR(&cpb,b))));
 686 }
 687
 688 /*******************************************************************
 689  Case insensitive string comparison, length limited.
 690 ********************************************************************/
 691
 692 int strncasecmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b, size_t len)
 693 {
 694         smb_ucs2_t cpa, cpb;
 695         size_t n = 0;
 696
 697         while ((n < len) && *COPY_UCS2_CHAR(&cpb,b) && (toupper_w(*(COPY_UCS2_CHAR(&cpa,a))) == toupper_w(cpb))) {
 698                 a++;
 699                 b++;
 700                 n++;
 701         }
 702         return (len - n)?(tolower_w(*(COPY_UCS2_CHAR(&cpa,a))) - tolower_w(*(COPY_UCS2_CHAR(&cpb,b)))):0;
 703 }
 704
 705 /*******************************************************************
 706  Compare 2 strings.
 707 ********************************************************************/
 708
 709 BOOL strequal_w(const smb_ucs2_t *s1, const smb_ucs2_t *s2)
 710 {
 711         if (s1 == s2) {
 712                 return(True);
 713         }
 714         if (!s1 || !s2) {
 715                 return(False);
 716         }
 717
 718         return(strcasecmp_w(s1,s2)==0);
 719 }
 720
 721 /*******************************************************************
 722  Compare 2 strings up to and including the nth char.
 723 ******************************************************************/
 724
 725 BOOL strnequal_w(const smb_ucs2_t *s1,const smb_ucs2_t *s2,size_t n)
 726 {
 727         if (s1 == s2) {
 728                 return(True);
 729         }
 730         if (!s1 || !s2 || !n) {
 731                 return(False);
 732         }
 733
 734         return(strncasecmp_w(s1,s2,n)==0);
 735 }
 736
 737 /*******************************************************************
 738  Duplicate string.
 739 ********************************************************************/
 740
 741 smb_ucs2_t *strdup_w(const smb_ucs2_t *src)
 742 {
 743         return strndup_w(src, 0);
 744 }
 745
 746 /* if len == 0 then duplicate the whole string */
 747
 748 smb_ucs2_t *strndup_w(const smb_ucs2_t *src, size_t len)
 749 {
 750         smb_ucs2_t *dest;
 751
 752         if (!len) {
 753                 len = strlen_w(src);
 754         }
 755         dest = SMB_MALLOC_ARRAY(smb_ucs2_t, len + 1);
 756         if (!dest) {
 757                 DEBUG(0,("strdup_w: out of memory!\n"));
 758                 return NULL;
 759         }
 760
 761         memcpy(dest, src, len * sizeof(smb_ucs2_t));
 762         dest[len] = 0;
 763         return dest;
 764 }
 765
 766 /*******************************************************************
 767  Copy a string with max len.
 768 ********************************************************************/
 769
 770 smb_ucs2_t *strncpy_w(smb_ucs2_t *dest, const smb_ucs2_t *src, const size_t max)
 771 {
 772         smb_ucs2_t cp;
 773         size_t len;
 774
 775         if (!dest || !src) {
 776                 return NULL;
 777         }
 778
 779         for (len = 0; (*COPY_UCS2_CHAR(&cp,(src+len))) && (len < max); len++) {
 780                 cp = *COPY_UCS2_CHAR(dest+len,src+len);
 781         }
 782         cp = 0;
 783         for ( /*nothing*/ ; len < max; len++ ) {
 784                 cp = *COPY_UCS2_CHAR(dest+len,&cp);
 785         }
 786
 787         return dest;
 788 }
 789
 790 /*******************************************************************
 791  Append a string of len bytes and add a terminator.
 792 ********************************************************************/
 793
 794 smb_ucs2_t *strncat_w(smb_ucs2_t *dest, const smb_ucs2_t *src, const size_t max)
 795 {
 796         size_t start;
 797         size_t len;
 798         smb_ucs2_t z = 0;
 799
 800         if (!dest || !src) {
 801                 return NULL;
 802         }
 803
 804         start = strlen_w(dest);
 805         len = strnlen_w(src, max);
 806
 807         memcpy(&dest[start], src, len*sizeof(smb_ucs2_t));
 808         z = *COPY_UCS2_CHAR(dest+start+len,&z);
 809
 810         return dest;
 811 }
 812
 813 smb_ucs2_t *strcat_w(smb_ucs2_t *dest, const smb_ucs2_t *src)
 814 {
 815         size_t start;
 816         size_t len;
 817         smb_ucs2_t z = 0;
 818
 819         if (!dest || !src) {
 820                 return NULL;
 821         }
 822
 823         start = strlen_w(dest);
 824         len = strlen_w(src);
 825
 826         memcpy(&dest[start], src, len*sizeof(smb_ucs2_t));
 827         z = *COPY_UCS2_CHAR(dest+start+len,&z);
 828
 829         return dest;
 830 }
 831
 832
 833 /*******************************************************************
 834  Replace any occurence of oldc with newc in unicode string.
 835 ********************************************************************/
 836
 837 void string_replace_w(smb_ucs2_t *s, smb_ucs2_t oldc, smb_ucs2_t newc)
 838 {
 839         smb_ucs2_t cp;
 840
 841         for(;*(COPY_UCS2_CHAR(&cp,s));s++) {
 842                 if(cp==oldc) {
 843                         COPY_UCS2_CHAR(s,&newc);
 844                 }
 845         }
 846 }
 847
 848 /*******************************************************************
 849  Trim unicode string.
 850 ********************************************************************/
 851
 852 BOOL trim_string_w(smb_ucs2_t *s, const smb_ucs2_t *front,
 853                                   const smb_ucs2_t *back)
 854 {
 855         BOOL ret = False;
 856         size_t len, front_len, back_len;
 857
 858         if (!s) {
 859                 return False;
 860         }
 861
 862         len = strlen_w(s);
 863
 864         if (front && *front) {
 865                 front_len = strlen_w(front);
 866                 while (len && strncmp_w(s, front, front_len) == 0) {
 867                         memmove(s, (s + front_len), (len - front_len + 1) * sizeof(smb_ucs2_t));
 868                         len -= front_len;
 869                         ret = True;
 870                 }
 871         }
 872
 873         if (back && *back) {
 874                 back_len = strlen_w(back);
 875                 while (len && strncmp_w((s + (len - back_len)), back, back_len) == 0) {
 876                         s[len - back_len] = 0;
 877                         len -= back_len;
 878                         ret = True;
 879                 }
 880         }
 881
 882         return ret;
 883 }
 884
 885 /*
 886   The *_wa() functions take a combination of 7 bit ascii
 887   and wide characters They are used so that you can use string
 888   functions combining C string constants with ucs2 strings
 889
 890   The char* arguments must NOT be multibyte - to be completely sure
 891   of this only pass string constants */
 892
 893 int strcmp_wa(const smb_ucs2_t *a, const char *b)
 894 {
 895         smb_ucs2_t cp = 0;
 896
 897         while (*b && *(COPY_UCS2_CHAR(&cp,a)) == UCS2_CHAR(*b)) {
 898                 a++;
 899                 b++;
 900         }
 901         return (*(COPY_UCS2_CHAR(&cp,a)) - UCS2_CHAR(*b));
 902 }
 903
 904 int strncmp_wa(const smb_ucs2_t *a, const char *b, size_t len)
 905 {
 906         smb_ucs2_t cp = 0;
 907         size_t n = 0;
 908
 909         while ((n < len) && *b && *(COPY_UCS2_CHAR(&cp,a)) == UCS2_CHAR(*b)) {
 910                 a++;
 911                 b++;
 912                 n++;
 913         }
 914         return (len - n)?(*(COPY_UCS2_CHAR(&cp,a)) - UCS2_CHAR(*b)):0;
 915 }
 916
 917 smb_ucs2_t *strpbrk_wa(const smb_ucs2_t *s, const char *p)
 918 {
 919         smb_ucs2_t cp;
 920
 921         while (*(COPY_UCS2_CHAR(&cp,s))) {
 922                 int i;
 923                 for (i=0; p[i] && cp != UCS2_CHAR(p[i]); i++)
 924                         ;
 925                 if (p[i]) {
 926                         return (smb_ucs2_t *)s;
 927                 }
 928                 s++;
 929         }
 930         return NULL;
 931 }
 932
 933 smb_ucs2_t *strstr_wa(const smb_ucs2_t *s, const char *ins)
 934 {
 935         smb_ucs2_t *r;
 936         size_t inslen;
 937
 938         if (!s || !ins) {
 939                 return NULL;
 940         }
 941
 942         inslen = strlen(ins);
 943         r = (smb_ucs2_t *)s;
 944
 945         while ((r = strchr_w(r, UCS2_CHAR(*ins)))) {
 946                 if (strncmp_wa(r, ins, inslen) == 0)
 947                         return r;
 948                 r++;
 949         }
 950
 951         return NULL;
 952 }
 953
 954 BOOL trim_string_wa(smb_ucs2_t *s, const char *front,
 955                                   const char *back)
 956 {
 957         wpstring f, b;
 958
 959         if (front) {
 960                 push_ucs2(NULL, f, front, sizeof(wpstring) - 1, STR_TERMINATE);
 961         } else {
 962                 *f = 0;
 963         }
 964         if (back) {
 965                 push_ucs2(NULL, b, back, sizeof(wpstring) - 1, STR_TERMINATE);
 966         } else {
 967                 *b = 0;
 968         }
 969         return trim_string_w(s, f, b);
 970 }
 971
 972 /*******************************************************************
 973  Returns the length in number of wide characters.
 974 ******************************************************************/
 975
 976 int unistrlen(uint16 *s)
 977 {
 978         int len;
 979
 980         if (!s) {
 981                 return -1;
 982         }
 983
 984         for (len=0; SVAL(s,0); s++,len++) {
 985                 ;
 986         }
 987
 988         return len;
 989 }
 990
 991 /*******************************************************************
 992  Strcpy for unicode strings. Returns length (in num of wide chars).
 993  Not odd align safe.
 994 ********************************************************************/
 995
 996 int unistrcpy(uint16 *dst, uint16 *src)
 997 {
 998         int num_wchars = 0;
 999
1000         while (SVAL(src,0)) {
1001                 *dst++ = *src++;
1002                 num_wchars++;
1003         }
1004         *dst = 0;
1005
1006         return num_wchars;
1007 }
1008
1009 /**
1010  * Samba ucs2 type to UNISTR2 conversion
1011  *
1012  * @param ctx Talloc context to create the dst strcture (if null) and the
1013  *            contents of the unicode string.
1014  * @param dst UNISTR2 destination. If equals null, then it's allocated.
1015  * @param src smb_ucs2_t source.
1016  * @param max_len maximum number of unicode characters to copy. If equals
1017  *        null, then null-termination of src is taken
1018  *
1019  * @return copied UNISTR2 destination
1020  **/
1021
1022 UNISTR2* ucs2_to_unistr2(TALLOC_CTX *ctx, UNISTR2* dst, smb_ucs2_t* src)
1023 {
1024         size_t len;
1025
1026         if (!src) {
1027                 return NULL;
1028         }
1029
1030         len = strlen_w(src);
1031
1032         /* allocate UNISTR2 destination if not given */
1033         if (!dst) {
1034                 dst = TALLOC_P(ctx, UNISTR2);
1035                 if (!dst)
1036                         return NULL;
1037         }
1038         if (!dst->buffer) {
1039                 dst->buffer = TALLOC_ARRAY(ctx, uint16, len + 1);
1040                 if (!dst->buffer)
1041                         return NULL;
1042         }
1043
1044         /* set UNISTR2 parameters */
1045         dst->uni_max_len = len + 1;
1046         dst->offset = 0;
1047         dst->uni_str_len = len;
1048
1049         /* copy the actual unicode string */
1050         strncpy_w(dst->buffer, src, dst->uni_max_len);
1051
1052         return dst;
1053 }
1054
1055 /*************************************************************
1056  ascii only toupper - saves the need for smbd to be in C locale.
1057 *************************************************************/
1058
1059 int toupper_ascii(int c)
1060 {
1061         smb_ucs2_t uc = toupper_w(UCS2_CHAR(c));
1062         return UCS2_TO_CHAR(uc);
1063 }
1064
1065 /*************************************************************
1066  ascii only tolower - saves the need for smbd to be in C locale.
1067 *************************************************************/
1068
1069 int tolower_ascii(int c)
1070 {
1071         smb_ucs2_t uc = tolower_w(UCS2_CHAR(c));
1072         return UCS2_TO_CHAR(uc);
1073 }
1074
1075 /*************************************************************
1076  ascii only isupper - saves the need for smbd to be in C locale.
1077 *************************************************************/
1078
1079 int isupper_ascii(int c)
1080 {
1081         return isupper_w(UCS2_CHAR(c));
1082 }
1083
1084 /*************************************************************
1085  ascii only islower - saves the need for smbd to be in C locale.
1086 *************************************************************/
1087
1088 int islower_ascii(int c)
1089 {
1090         return islower_w(UCS2_CHAR(c));
1091 }