binutils/rclex.c

   1 /* rclex.c -- lexer for Windows rc files parser  */
   2
   3 /* Copyright 1997, 1998, 1999, 2001, 2002, 2003, 2005, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    Written by Kai Tietz, Onevision.
   7
   8    This file is part of GNU Binutils.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  23    02110-1301, USA.  */
  24
  25
  26 /* This is a lexer used by the Windows rc file parser.  It basically
  27    just recognized a bunch of keywords.  */
  28
  29 #include "sysdep.h"
  30 #include "bfd.h"
  31 #include "bucomm.h"
  32 #include "libiberty.h"
  33 #include "safe-ctype.h"
  34 #include "windres.h"
  35 #include "rcparse.h"
  36
  37 #include <assert.h>
  38
  39 /* Whether we are in rcdata mode, in which we returns the lengths of
  40    strings.  */
  41
  42 static int rcdata_mode;
  43
  44 /* Whether we are supressing lines from cpp (including windows.h or
  45    headers from your C sources may bring in externs and typedefs).
  46    When active, we return IGNORED_TOKEN, which lets us ignore these
  47    outside of resource constructs.  Thus, it isn't required to protect
  48    all the non-preprocessor lines in your header files with #ifdef
  49    RC_INVOKED.  It also means your RC file can't include other RC
  50    files if they're named "*.h".  Sorry.  Name them *.rch or whatever.  */
  51
  52 static int suppress_cpp_data;
  53
  54 #define IGNORE_CPP(x) (suppress_cpp_data ? IGNORED_TOKEN : (x))
  55
  56 /* The first filename we detect in the cpp output.  We use this to
  57    tell included files from the original file.  */
  58
  59 static char *initial_fn;
  60
  61 /* List of allocated strings.  */
  62
  63 struct alloc_string
  64 {
  65   struct alloc_string *next;
  66   char *s;
  67 };
  68
  69 static struct alloc_string *strings;
  70
  71 struct rclex_keywords
  72 {
  73   const char *name;
  74   int tok;
  75 };
  76
  77 #define K(KEY)  { #KEY, KEY }
  78 #define KRT(KEY)  { #KEY, RT_##KEY }
  79
  80 static const struct rclex_keywords keywds[] =
  81 {
  82   K(ACCELERATORS), K(ALT), K(ANICURSOR), K(ANIICON), K(ASCII),
  83   K(AUTO3STATE), K(AUTOCHECKBOX), K(AUTORADIOBUTTON),
  84   K(BEDIT), { "BEGIN", BEG }, K(BITMAP), K(BLOCK), K(BUTTON),
  85   K(CAPTION), K(CHARACTERISTICS), K(CHECKBOX), K(CHECKED),
  86   K(CLASS), K(COMBOBOX), K(CONTROL), K(CTEXT), K(CURSOR),
  87   K(DEFPUSHBUTTON), K(DIALOG), K(DIALOGEX), K(DISCARDABLE),
  88   K(DLGINCLUDE), K(DLGINIT),
  89   K(EDITTEXT), K(END), K(EXSTYLE),
  90   K(FILEFLAGS), K(FILEFLAGSMASK), K(FILEOS), K(FILESUBTYPE),
  91   K(FILETYPE), K(FILEVERSION), K(FIXED), K(FONT), K(FONTDIR),
  92   K(GRAYED), KRT(GROUP_CURSOR), KRT(GROUP_ICON), K(GROUPBOX),
  93   K(HEDIT), K(HELP), K(HTML),
  94   K(ICON), K(IEDIT), K(IMPURE), K(INACTIVE),
  95   K(LANGUAGE), K(LISTBOX), K(LOADONCALL), K(LTEXT),
  96   K(MANIFEST), K(MENU), K(MENUBARBREAK), K(MENUBREAK),
  97   K(MENUEX), K(MENUITEM), K(MESSAGETABLE), K(MOVEABLE),
  98   K(NOINVERT), K(NOT),
  99   K(PLUGPLAY), K(POPUP), K(PRELOAD), K(PRODUCTVERSION),
 100   K(PURE), K(PUSHBOX), K(PUSHBUTTON),
 101   K(RADIOBUTTON), K(RCDATA), K(RTEXT),
 102   K(SCROLLBAR), K(SEPARATOR), K(SHIFT), K(STATE3),
 103   K(STRINGTABLE), K(STYLE),
 104   K(TOOLBAR),
 105   K(USERBUTTON),
 106   K(VALUE), { "VERSION", VERSIONK }, K(VERSIONINFO),
 107   K(VIRTKEY), K(VXD),
 108   { NULL, 0 },
 109 };
 110
 111 /* External input stream from resrc */
 112 extern FILE *cpp_pipe;
 113
 114 /* Lexical scanner helpers.  */
 115 static int rclex_lastch = -1;
 116 static size_t rclex_tok_max = 0;
 117 static size_t rclex_tok_pos = 0;
 118 static char *rclex_tok = NULL;
 119
 120 static int
 121 rclex_translatekeyword (const char *key)
 122 {
 123   if (key && ISUPPER (key[0]))
 124     {
 125       const struct rclex_keywords *kw = &keywds[0];
 126
 127       do
 128         {
 129           if (! strcmp (kw->name, key))
 130             return kw->tok;
 131           ++kw;
 132         }
 133       while (kw->name != NULL);
 134     }
 135   return STRING;
 136 }
 137
 138 /* Handle a C preprocessor line.  */
 139
 140 static void
 141 cpp_line (void)
 142 {
 143   const char *s = rclex_tok;
 144   int line;
 145   char *send, *fn;
 146   size_t len, mlen;
 147
 148   ++s;
 149   while (ISSPACE (*s))
 150     ++s;
 151
 152   /* Check for #pragma code_page ( DEFAULT | <nr>).  */
 153   len = strlen (s);
 154   mlen = strlen ("pragma");
 155   if (len > mlen && memcmp (s, "pragma", mlen) == 0 && ISSPACE (s[mlen]))
 156     {
 157       const char *end;
 158
 159       s += mlen + 1;
 160       while (ISSPACE (*s))
 161         ++s;
 162       len = strlen (s);
 163       mlen = strlen ("code_page");
 164       if (len <= mlen || memcmp (s, "code_page", mlen) != 0)
 165         /* FIXME: We ought to issue a warning message about an unrecognised pragma.  */
 166         return;
 167       s += mlen;
 168       while (ISSPACE (*s))
 169         ++s;
 170       if (*s != '(')
 171         /* FIXME: We ought to issue an error message about a malformed pragma.  */
 172         return;
 173       ++s;
 174       while (ISSPACE (*s))
 175         ++s;
 176       if (*s == 0 || (end = strchr (s, ')')) == NULL)
 177         /* FIXME: We ought to issue an error message about a malformed pragma.  */
 178         return;
 179       len = (size_t) (end - s);
 180       fn = xmalloc (len + 1);
 181       if (len)
 182         memcpy (fn, s, len);
 183       fn[len] = 0;
 184       while (len > 0 && (fn[len - 1] > 0 && fn[len - 1] <= 0x20))
 185         fn[--len] = 0;
 186       if (! len || (len == strlen ("DEFAULT") && strcasecmp (fn, "DEFAULT") == 0))
 187         wind_current_codepage = wind_default_codepage;
 188       else if (len > 0)
 189         {
 190           rc_uint_type ncp;
 191
 192           if (fn[0] == '0' && (fn[1] == 'x' || fn[1] == 'X'))
 193               ncp = (rc_uint_type) strtol (fn + 2, NULL, 16);
 194           else
 195               ncp = (rc_uint_type) strtol (fn, NULL, 10);
 196           if (ncp == CP_UTF16 || ! unicode_is_valid_codepage (ncp))
 197             fatal (_("invalid value specified for pragma code_page.\n"));
 198           wind_current_codepage = ncp;
 199         }
 200       free (fn);
 201       return;
 202     }
 203
 204   line = strtol (s, &send, 0);
 205   if (*send != '\0' && ! ISSPACE (*send))
 206     return;
 207
 208   /* Subtract 1 because we are about to count the newline.  */
 209   rc_lineno = line - 1;
 210
 211   s = send;
 212   while (ISSPACE (*s))
 213     ++s;
 214
 215   if (*s != '"')
 216     return;
 217
 218   ++s;
 219   send = strchr (s, '"');
 220   if (send == NULL)
 221     return;
 222
 223   fn = xmalloc (send - s + 1);
 224   strncpy (fn, s, send - s);
 225   fn[send - s] = '\0';
 226
 227   free (rc_filename);
 228   rc_filename = fn;
 229
 230   if (! initial_fn)
 231     {
 232       initial_fn = xmalloc (strlen (fn) + 1);
 233       strcpy (initial_fn, fn);
 234     }
 235
 236   /* Allow the initial file, regardless of name.  Suppress all other
 237      files if they end in ".h" (this allows included "*.rc").  */
 238   if (strcmp (initial_fn, fn) == 0
 239       || strcmp (fn + strlen (fn) - 2, ".h") != 0)
 240     suppress_cpp_data = 0;
 241   else
 242     suppress_cpp_data = 1;
 243 }
 244
 245 /* Allocate a string of a given length.  */
 246
 247 static char *
 248 get_string (int len)
 249 {
 250   struct alloc_string *as;
 251
 252   as = xmalloc (sizeof *as);
 253   as->s = xmalloc (len);
 254
 255   as->next = strings;
 256   strings = as;
 257
 258   return as->s;
 259 }
 260
 261 /* Handle a quoted string.  The quotes are stripped.  A pair of quotes
 262    in a string are turned into a single quote.  Adjacent strings are
 263    merged separated by whitespace are merged, as in C.  */
 264
 265 static char *
 266 handle_quotes (rc_uint_type *len)
 267 {
 268   const char *input = rclex_tok;
 269   char *ret, *s;
 270   const char *t;
 271   int ch;
 272   int num_xdigits;
 273
 274   ret = get_string (strlen (input) + 1);
 275
 276   s = ret;
 277   t = input;
 278   if (*t == '"')
 279     ++t;
 280   while (*t != '\0')
 281     {
 282       if (*t == '\\')
 283         {
 284           ++t;
 285           switch (*t)
 286             {
 287             case '\0':
 288               rcparse_warning ("backslash at end of string");
 289               break;
 290
 291             case '\"':
 292               rcparse_warning ("use \"\" to put \" in a string");
 293               *s++ = '"';
 294               ++t;
 295               break;
 296
 297             case 'a':
 298               *s++ = ESCAPE_B; /* Strange, but true...  */
 299               ++t;
 300               break;
 301
 302             case 'b':
 303               *s++ = ESCAPE_B;
 304               ++t;
 305               break;
 306
 307             case 'f':
 308               *s++ = ESCAPE_F;
 309               ++t;
 310               break;
 311
 312             case 'n':
 313               *s++ = ESCAPE_N;
 314               ++t;
 315               break;
 316
 317             case 'r':
 318               *s++ = ESCAPE_R;
 319               ++t;
 320               break;
 321
 322             case 't':
 323               *s++ = ESCAPE_T;
 324               ++t;
 325               break;
 326
 327             case 'v':
 328               *s++ = ESCAPE_V;
 329               ++t;
 330               break;
 331
 332             case '\\':
 333               *s++ = *t++;
 334               break;
 335
 336             case '0': case '1': case '2': case '3':
 337             case '4': case '5': case '6': case '7':
 338               ch = *t - '0';
 339               ++t;
 340               if (*t >= '0' && *t <= '7')
 341                 {
 342                   ch = (ch << 3) | (*t - '0');
 343                   ++t;
 344                   if (*t >= '0' && *t <= '7')
 345                     {
 346                       ch = (ch << 3) | (*t - '0');
 347                       ++t;
 348                     }
 349                 }
 350               *s++ = ch;
 351               break;
 352
 353             case 'x': case 'X':
 354               ++t;
 355               ch = 0;
 356               /* We only handle single byte chars here.  Make sure
 357                  we finish an escape sequence like "/xB0ABC" after
 358                  the first two digits.  */
 359               num_xdigits = 2;
 360               while (num_xdigits--)
 361                 {
 362                   if (*t >= '0' && *t <= '9')
 363                     ch = (ch << 4) | (*t - '0');
 364                   else if (*t >= 'a' && *t <= 'f')
 365                     ch = (ch << 4) | (*t - 'a' + 10);
 366                   else if (*t >= 'A' && *t <= 'F')
 367                     ch = (ch << 4) | (*t - 'A' + 10);
 368                   else
 369                     break;
 370                   ++t;
 371                 }
 372               *s++ = ch;
 373               break;
 374
 375             default:
 376               rcparse_warning ("unrecognized escape sequence");
 377               *s++ = '\\';
 378               *s++ = *t++;
 379               break;
 380             }
 381         }
 382       else if (*t != '"')
 383         *s++ = *t++;
 384       else if (t[1] == '\0')
 385         break;
 386       else if (t[1] == '"')
 387         {
 388           *s++ = '"';
 389           t += 2;
 390         }
 391       else
 392         {
 393           rcparse_warning ("unexpected character after '\"'");
 394           ++t;
 395           assert (ISSPACE (*t));
 396           while (ISSPACE (*t))
 397             {
 398               if ((*t) == '\n')
 399                 ++rc_lineno;
 400               ++t;
 401             }
 402           if (*t == '\0')
 403             break;
 404           assert (*t == '"');
 405           ++t;
 406         }
 407     }
 408
 409   *s = '\0';
 410
 411   *len = s - ret;
 412
 413   return ret;
 414 }
 415
 416 /* Allocate a unicode string of a given length.  */
 417
 418 static unichar *
 419 get_unistring (int len)
 420 {
 421   return (unichar *) get_string (len * sizeof (unichar));
 422 }
 423
 424 /* Handle a quoted unicode string.  The quotes are stripped.  A pair of quotes
 425    in a string are turned into a single quote.  Adjacent strings are
 426    merged separated by whitespace are merged, as in C.  */
 427
 428 static unichar *
 429 handle_uniquotes (rc_uint_type *len)
 430 {
 431   const char *input = rclex_tok;
 432   unichar *ret, *s;
 433   const char *t;
 434   int ch;
 435   int num_xdigits;
 436
 437   ret = get_unistring (strlen (input) + 1);
 438
 439   s = ret;
 440   t = input;
 441   if ((*t == 'L' || *t == 'l') && t[1] == '"')
 442     t += 2;
 443   else if (*t == '"')
 444     ++t;
 445   while (*t != '\0')
 446     {
 447       if (*t == '\\')
 448         {
 449           ++t;
 450           switch (*t)
 451             {
 452             case '\0':
 453               rcparse_warning ("backslash at end of string");
 454               break;
 455
 456             case '\"':
 457               rcparse_warning ("use \"\" to put \" in a string");
 458               break;
 459
 460             case 'a':
 461               *s++ = ESCAPE_B; /* Strange, but true...  */
 462               ++t;
 463               break;
 464
 465             case 'b':
 466               *s++ = ESCAPE_B;
 467               ++t;
 468               break;
 469
 470             case 'f':
 471               *s++ = ESCAPE_F;
 472               ++t;
 473               break;
 474
 475             case 'n':
 476               *s++ = ESCAPE_N;
 477               ++t;
 478               break;
 479
 480             case 'r':
 481               *s++ = ESCAPE_R;
 482               ++t;
 483               break;
 484
 485             case 't':
 486               *s++ = ESCAPE_T;
 487               ++t;
 488               break;
 489
 490             case 'v':
 491               *s++ = ESCAPE_V;
 492               ++t;
 493               break;
 494
 495             case '\\':
 496               *s++ = (unichar) *t++;
 497               break;
 498
 499             case '0': case '1': case '2': case '3':
 500             case '4': case '5': case '6': case '7':
 501               ch = *t - '0';
 502               ++t;
 503               if (*t >= '0' && *t <= '7')
 504                 {
 505                   ch = (ch << 3) | (*t - '0');
 506                   ++t;
 507                   if (*t >= '0' && *t <= '7')
 508                     {
 509                       ch = (ch << 3) | (*t - '0');
 510                       ++t;
 511                     }
 512                 }
 513               *s++ = (unichar) ch;
 514               break;
 515
 516             case 'x': case 'X':
 517               ++t;
 518               ch = 0;
 519               /* We only handle two byte chars here.  Make sure
 520                  we finish an escape sequence like "/xB0ABC" after
 521                  the first two digits.  */
 522               num_xdigits = 4;
 523               while (num_xdigits--)
 524                 {
 525                   if (*t >= '0' && *t <= '9')
 526                     ch = (ch << 4) | (*t - '0');
 527                   else if (*t >= 'a' && *t <= 'f')
 528                     ch = (ch << 4) | (*t - 'a' + 10);
 529                   else if (*t >= 'A' && *t <= 'F')
 530                     ch = (ch << 4) | (*t - 'A' + 10);
 531                   else
 532                     break;
 533                   ++t;
 534                 }
 535               *s++ = (unichar) ch;
 536               break;
 537
 538             default:
 539               rcparse_warning ("unrecognized escape sequence");
 540               *s++ = '\\';
 541               *s++ = (unichar) *t++;
 542               break;
 543             }
 544         }
 545       else if (*t != '"')
 546         *s++ = (unichar) *t++;
 547       else if (t[1] == '\0')
 548         break;
 549       else if (t[1] == '"')
 550         {
 551           *s++ = '"';
 552           t += 2;
 553         }
 554       else
 555         {
 556           ++t;
 557           assert (ISSPACE (*t));
 558           while (ISSPACE (*t))
 559             {
 560               if ((*t) == '\n')
 561                 ++rc_lineno;
 562               ++t;
 563             }
 564           if (*t == '\0')
 565             break;
 566           assert (*t == '"');
 567           ++t;
 568         }
 569     }
 570
 571   *s = '\0';
 572
 573   *len = s - ret;
 574
 575   return ret;
 576 }
 577
 578 /* Discard all the strings we have allocated.  The parser calls this
 579    when it no longer needs them.  */
 580
 581 void
 582 rcparse_discard_strings (void)
 583 {
 584   struct alloc_string *as;
 585
 586   as = strings;
 587   while (as != NULL)
 588     {
 589       struct alloc_string *n;
 590
 591       free (as->s);
 592       n = as->next;
 593       free (as);
 594       as = n;
 595     }
 596
 597   strings = NULL;
 598 }
 599
 600 /* Enter rcdata mode.  */
 601 void
 602 rcparse_rcdata (void)
 603 {
 604   rcdata_mode = 1;
 605 }
 606
 607 /* Go back to normal mode from rcdata mode.  */
 608 void
 609 rcparse_normal (void)
 610 {
 611   rcdata_mode = 0;
 612 }
 613
 614 static void
 615 rclex_tok_add_char (int ch)
 616 {
 617   if (! rclex_tok || rclex_tok_max <= rclex_tok_pos)
 618     {
 619       char *h = xmalloc (rclex_tok_max + 9);
 620
 621       if (! h)
 622         abort ();
 623       if (rclex_tok)
 624         {
 625           memcpy (h, rclex_tok, rclex_tok_pos + 1);
 626           free (rclex_tok);
 627         }
 628       else
 629         rclex_tok_pos = 0;
 630       rclex_tok_max += 8;
 631       rclex_tok = h;
 632     }
 633   if (ch != -1)
 634     rclex_tok[rclex_tok_pos++] = (char) ch;
 635   rclex_tok[rclex_tok_pos] = 0;
 636 }
 637
 638 static int
 639 rclex_readch (void)
 640 {
 641   int r = -1;
 642
 643   if ((r = rclex_lastch) != -1)
 644     rclex_lastch = -1;
 645   else
 646     {
 647       char ch;
 648       do
 649         {
 650           if (! cpp_pipe || feof (cpp_pipe)
 651               || fread (&ch, 1, 1,cpp_pipe) != 1)
 652             break;
 653           r = ((int) ch) & 0xff;
 654         }
 655       while (r == 0 || r == '\r');
 656   }
 657   rclex_tok_add_char (r);
 658   return r;
 659 }
 660
 661 static int
 662 rclex_peekch (void)
 663 {
 664   int r;
 665
 666   if ((r = rclex_lastch) == -1)
 667     {
 668       if ((r = rclex_readch ()) != -1)
 669         {
 670           rclex_lastch = r;
 671           if (rclex_tok_pos > 0)
 672             rclex_tok[--rclex_tok_pos] = 0;
 673         }
 674     }
 675   return r;
 676 }
 677
 678 static void
 679 rclex_string (void)
 680 {
 681   int c;
 682
 683   while ((c = rclex_peekch ()) != -1)
 684     {
 685       if (c == '\n')
 686         break;
 687       if (c == '\\')
 688         {
 689           rclex_readch ();
 690           if ((c = rclex_peekch ()) == -1 || c == '\n')
 691             break;
 692           rclex_readch ();
 693         }
 694       else if (rclex_readch () == '"')
 695         {
 696           if (rclex_peekch () == '"')
 697             rclex_readch ();
 698           else
 699             break;
 700         }
 701     }
 702 }
 703
 704 static rc_uint_type
 705 read_digit (int ch)
 706 {
 707   rc_uint_type base = 10;
 708   rc_uint_type ret, val;
 709   int warned = 0;
 710
 711   ret = 0;
 712   if (ch == '0')
 713     {
 714       base = 8;
 715       switch (rclex_peekch ())
 716         {
 717         case 'o': case 'O':
 718           rclex_readch ();
 719           base = 8;
 720           break;
 721
 722         case 'x': case 'X':
 723           rclex_readch ();
 724           base = 16;
 725           break;
 726         }
 727     }
 728   else
 729     ret = (rc_uint_type) (ch - '0');
 730   while ((ch = rclex_peekch ()) != -1)
 731     {
 732       if (ISDIGIT (ch))
 733         val = (rc_uint_type) (ch - '0');
 734       else if (ch >= 'a' && ch <= 'f')
 735         val = (rc_uint_type) ((ch - 'a') + 10);
 736       else if (ch >= 'A' && ch <= 'F')
 737         val = (rc_uint_type) ((ch - 'A') + 10);
 738       else
 739         break;
 740       rclex_readch ();
 741       if (! warned && val >= base)
 742         {
 743           warned = 1;
 744           rcparse_warning ("digit exceeds base");
 745         }
 746       ret *= base;
 747       ret += val;
 748     }
 749   return ret;
 750 }
 751
 752 /* yyparser entry method.  */
 753
 754 int
 755 yylex (void)
 756 {
 757   char *s;
 758   unichar *us;
 759   rc_uint_type length;
 760   int ch;
 761
 762   /* Make sure that rclex_tok is initialized.  */
 763   if (! rclex_tok)
 764     rclex_tok_add_char (-1);
 765
 766   do
 767     {
 768       do
 769         {
 770           /* Clear token.  */
 771           rclex_tok_pos = 0;
 772           rclex_tok[0] = 0;
 773
 774           if ((ch = rclex_readch ()) == -1)
 775             return -1;
 776           if (ch == '\n')
 777             ++rc_lineno;
 778         }
 779       while (ch <= 0x20);
 780
 781       switch (ch)
 782         {
 783         case '#':
 784           while ((ch = rclex_peekch ()) != -1 && ch != '\n')
 785             rclex_readch ();
 786           cpp_line ();
 787           ch = IGNORED_TOKEN;
 788           break;
 789
 790         case '{':
 791           ch = IGNORE_CPP (BEG);
 792           break;
 793
 794         case '}':
 795           ch = IGNORE_CPP (END);
 796           break;
 797
 798         case '0': case '1': case '2': case '3': case '4':
 799         case '5': case '6': case '7': case '8': case '9':
 800           yylval.i.val = read_digit (ch);
 801           yylval.i.dword = 0;
 802           switch (rclex_peekch ())
 803             {
 804             case 'l': case 'L':
 805               rclex_readch ();
 806               yylval.i.dword = 1;
 807               break;
 808             }
 809           ch = IGNORE_CPP (NUMBER);
 810           break;
 811         case '"':
 812           rclex_string ();
 813           ch = IGNORE_CPP ((! rcdata_mode ? QUOTEDSTRING : SIZEDSTRING));
 814           if (ch == IGNORED_TOKEN)
 815             break;
 816           s = handle_quotes (&length);
 817           if (! rcdata_mode)
 818             yylval.s = s;
 819           else
 820             {
 821               yylval.ss.length = length;
 822               yylval.ss.s = s;
 823           }
 824           break;
 825         case 'L': case 'l':
 826           if (rclex_peekch () == '"')
 827             {
 828               rclex_readch ();
 829               rclex_string ();
 830               ch = IGNORE_CPP ((! rcdata_mode ? QUOTEDUNISTRING : SIZEDUNISTRING));
 831               if (ch == IGNORED_TOKEN)
 832                 break;
 833               us = handle_uniquotes (&length);
 834               if (! rcdata_mode)
 835                 yylval.uni = us;
 836               else
 837                 {
 838                   yylval.suni.length = length;
 839                   yylval.suni.s = us;
 840               }
 841               break;
 842             }
 843           /* Fall through.  */
 844         default:
 845           if (ISIDST (ch) || ch=='$')
 846             {
 847               while ((ch = rclex_peekch ()) != -1
 848                      && (ISIDNUM (ch) || ch == '$' || ch == '.'
 849                          || ch == ':' || ch == '\\' || ch == '/'
 850                          || ch == '_' || ch == '-')
 851                     )
 852                 rclex_readch ();
 853               ch = IGNORE_CPP (rclex_translatekeyword (rclex_tok));
 854               if (ch == STRING)
 855                 {
 856                   s = get_string (strlen (rclex_tok) + 1);
 857                   strcpy (s, rclex_tok);
 858                   yylval.s = s;
 859                 }
 860               else if (ch == BLOCK)
 861                 {
 862                   const char *hs = NULL;
 863
 864                   switch (yylex ())
 865                   {
 866                   case STRING:
 867                   case QUOTEDSTRING:
 868                     hs = yylval.s;
 869                     break;
 870                   case SIZEDSTRING:
 871                     hs = yylval.s = yylval.ss.s;
 872                     break;
 873                   }
 874                   if (! hs)
 875                     {
 876                       rcparse_warning ("BLOCK expects a string as argument.");
 877                       ch = IGNORED_TOKEN;
 878                     }
 879                   else if (! strcmp (hs, "StringFileInfo"))
 880                     ch = BLOCKSTRINGFILEINFO;
 881                   else if (! strcmp (hs, "VarFileInfo"))
 882                     ch = BLOCKVARFILEINFO;
 883                 }
 884               break;
 885             }
 886           ch = IGNORE_CPP (ch);
 887           break;
 888         }
 889     }
 890   while (ch == IGNORED_TOKEN);
 891
 892   return ch;
 893 }