binutils/nlmheader.y

   1 %{/* nlmheader.y - parse NLM header specification keywords.
   2      Copyright 1993, 1994, 1995, 1997, 1998, 2001, 2002, 2003
   3      Free Software Foundation, Inc.
   4
   5 This file is part of GNU Binutils.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program 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
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* Written by Ian Lance Taylor <ian@cygnus.com>.
  22
  23    This bison file parses the commands recognized by the NetWare NLM
  24    linker, except for lists of object files.  It stores the
  25    information in global variables.
  26
  27    This implementation is based on the description in the NetWare Tool
  28    Maker Specification manual, edition 1.0.  */
  29
  30 #include "ansidecl.h"
  31 #include <stdio.h>
  32 #include "safe-ctype.h"
  33 #include "bfd.h"
  34 #include "bucomm.h"
  35 #include "nlm/common.h"
  36 #include "nlm/internal.h"
  37 #include "nlmconv.h"
  38
  39 /* Information is stored in the structures pointed to by these
  40    variables.  */
  41
  42 Nlm_Internal_Fixed_Header *fixed_hdr;
  43 Nlm_Internal_Variable_Header *var_hdr;
  44 Nlm_Internal_Version_Header *version_hdr;
  45 Nlm_Internal_Copyright_Header *copyright_hdr;
  46 Nlm_Internal_Extended_Header *extended_hdr;
  47
  48 /* Procedure named by CHECK.  */
  49 char *check_procedure;
  50 /* File named by CUSTOM.  */
  51 char *custom_file;
  52 /* Whether to generate debugging information (DEBUG).  */
  53 bfd_boolean debug_info;
  54 /* Procedure named by EXIT.  */
  55 char *exit_procedure;
  56 /* Exported symbols (EXPORT).  */
  57 struct string_list *export_symbols;
  58 /* List of files from INPUT.  */
  59 struct string_list *input_files;
  60 /* Map file name (MAP, FULLMAP).  */
  61 char *map_file;
  62 /* Whether a full map has been requested (FULLMAP).  */
  63 bfd_boolean full_map;
  64 /* File named by HELP.  */
  65 char *help_file;
  66 /* Imported symbols (IMPORT).  */
  67 struct string_list *import_symbols;
  68 /* File named by MESSAGES.  */
  69 char *message_file;
  70 /* Autoload module list (MODULE).  */
  71 struct string_list *modules;
  72 /* File named by OUTPUT.  */
  73 char *output_file;
  74 /* File named by SHARELIB.  */
  75 char *sharelib_file;
  76 /* Start procedure name (START).  */
  77 char *start_procedure;
  78 /* VERBOSE.  */
  79 bfd_boolean verbose;
  80 /* RPC description file (XDCDATA).  */
  81 char *rpc_file;
  82
  83 /* The number of serious errors that have occurred.  */
  84 int parse_errors;
  85
  86 /* The current symbol prefix when reading a list of import or export
  87    symbols.  */
  88 static char *symbol_prefix;
  89
  90 /* Parser error message handler.  */
  91 #define yyerror(msg) nlmheader_error (msg);
  92
  93 /* Local functions.  */
  94 static int yylex (void);
  95 static void nlmlex_file_push (const char *);
  96 static bfd_boolean nlmlex_file_open (const char *);
  97 static int nlmlex_buf_init (void);
  98 static char nlmlex_buf_add (int);
  99 static long nlmlex_get_number (const char *);
 100 static void nlmheader_identify (void);
 101 static void nlmheader_warn (const char *, int);
 102 static void nlmheader_error (const char *);
 103 static struct string_list * string_list_cons (char *, struct string_list *);
 104 static struct string_list * string_list_append (struct string_list *,
 105                                                 struct string_list *);
 106 static struct string_list * string_list_append1 (struct string_list *,
 107                                                  char *);
 108 static char *xstrdup (const char *);
 109
 110 %}
 111
 112 %union
 113 {
 114   char *string;
 115   struct string_list *list;
 116 };
 117
 118 /* The reserved words.  */
 119
 120 %token CHECK CODESTART COPYRIGHT CUSTOM DATE DEBUG DESCRIPTION EXIT
 121 %token EXPORT FLAG_ON FLAG_OFF FULLMAP HELP IMPORT INPUT MAP MESSAGES
 122 %token MODULE MULTIPLE OS_DOMAIN OUTPUT PSEUDOPREEMPTION REENTRANT
 123 %token SCREENNAME SHARELIB STACK START SYNCHRONIZE
 124 %token THREADNAME TYPE VERBOSE VERSIONK XDCDATA
 125
 126 /* Arguments.  */
 127
 128 %token <string> STRING
 129 %token <string> QUOTED_STRING
 130
 131 /* Typed non-terminals.  */
 132 %type <list> symbol_list_opt symbol_list string_list
 133 %type <string> symbol
 134
 135 %%
 136
 137 /* Keywords must start in the leftmost column of the file.  Arguments
 138    may appear anywhere else.  The lexer uses this to determine what
 139    token to return, so we don't have to worry about it here.  */
 140
 141 /* The entire file is just a list of commands.  */
 142
 143 file:
 144           commands
 145         ;
 146
 147 /* A possibly empty list of commands.  */
 148
 149 commands:
 150           /* May be empty.  */
 151         | command commands
 152         ;
 153
 154 /* A single command.  There is where most of the work takes place.  */
 155
 156 command:
 157           CHECK STRING
 158           {
 159             check_procedure = $2;
 160           }
 161         | CODESTART STRING
 162           {
 163             nlmheader_warn (_("CODESTART is not implemented; sorry"), -1);
 164             free ($2);
 165           }
 166         | COPYRIGHT QUOTED_STRING
 167           {
 168             int len;
 169
 170             strncpy (copyright_hdr->stamp, "CoPyRiGhT=", 10);
 171             len = strlen ($2);
 172             if (len >= NLM_MAX_COPYRIGHT_MESSAGE_LENGTH)
 173               {
 174                 nlmheader_warn (_("copyright string is too long"),
 175                                 NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1);
 176                 len = NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1;
 177               }
 178             copyright_hdr->copyrightMessageLength = len;
 179             strncpy (copyright_hdr->copyrightMessage, $2, len);
 180             copyright_hdr->copyrightMessage[len] = '\0';
 181             free ($2);
 182           }
 183         | CUSTOM STRING
 184           {
 185             custom_file = $2;
 186           }
 187         | DATE STRING STRING STRING
 188           {
 189             /* We don't set the version stamp here, because we use the
 190                version stamp to detect whether the required VERSION
 191                keyword was given.  */
 192             version_hdr->month = nlmlex_get_number ($2);
 193             version_hdr->day = nlmlex_get_number ($3);
 194             version_hdr->year = nlmlex_get_number ($4);
 195             free ($2);
 196             free ($3);
 197             free ($4);
 198             if (version_hdr->month < 1 || version_hdr->month > 12)
 199               nlmheader_warn (_("illegal month"), -1);
 200             if (version_hdr->day < 1 || version_hdr->day > 31)
 201               nlmheader_warn (_("illegal day"), -1);
 202             if (version_hdr->year < 1900 || version_hdr->year > 3000)
 203               nlmheader_warn (_("illegal year"), -1);
 204           }
 205         | DEBUG
 206           {
 207             debug_info = TRUE;
 208           }
 209         | DESCRIPTION QUOTED_STRING
 210           {
 211             int len;
 212
 213             len = strlen ($2);
 214             if (len > NLM_MAX_DESCRIPTION_LENGTH)
 215               {
 216                 nlmheader_warn (_("description string is too long"),
 217                                 NLM_MAX_DESCRIPTION_LENGTH);
 218                 len = NLM_MAX_DESCRIPTION_LENGTH;
 219               }
 220             var_hdr->descriptionLength = len;
 221             strncpy (var_hdr->descriptionText, $2, len);
 222             var_hdr->descriptionText[len] = '\0';
 223             free ($2);
 224           }
 225         | EXIT STRING
 226           {
 227             exit_procedure = $2;
 228           }
 229         | EXPORT
 230           {
 231             symbol_prefix = NULL;
 232           }
 233           symbol_list_opt
 234           {
 235             export_symbols = string_list_append (export_symbols, $3);
 236           }
 237         | FLAG_ON STRING
 238           {
 239             fixed_hdr->flags |= nlmlex_get_number ($2);
 240             free ($2);
 241           }
 242         | FLAG_OFF STRING
 243           {
 244             fixed_hdr->flags &=~ nlmlex_get_number ($2);
 245             free ($2);
 246           }
 247         | FULLMAP
 248           {
 249             map_file = "";
 250             full_map = TRUE;
 251           }
 252         | FULLMAP STRING
 253           {
 254             map_file = $2;
 255             full_map = TRUE;
 256           }
 257         | HELP STRING
 258           {
 259             help_file = $2;
 260           }
 261         | IMPORT
 262           {
 263             symbol_prefix = NULL;
 264           }
 265           symbol_list_opt
 266           {
 267             import_symbols = string_list_append (import_symbols, $3);
 268           }
 269         | INPUT string_list
 270           {
 271             input_files = string_list_append (input_files, $2);
 272           }
 273         | MAP
 274           {
 275             map_file = "";
 276           }
 277         | MAP STRING
 278           {
 279             map_file = $2;
 280           }
 281         | MESSAGES STRING
 282           {
 283             message_file = $2;
 284           }
 285         | MODULE string_list
 286           {
 287             modules = string_list_append (modules, $2);
 288           }
 289         | MULTIPLE
 290           {
 291             fixed_hdr->flags |= 0x2;
 292           }
 293         | OS_DOMAIN
 294           {
 295             fixed_hdr->flags |= 0x10;
 296           }
 297         | OUTPUT STRING
 298           {
 299             if (output_file == NULL)
 300               output_file = $2;
 301             else
 302               nlmheader_warn (_("ignoring duplicate OUTPUT statement"), -1);
 303           }
 304         | PSEUDOPREEMPTION
 305           {
 306             fixed_hdr->flags |= 0x8;
 307           }
 308         | REENTRANT
 309           {
 310             fixed_hdr->flags |= 0x1;
 311           }
 312         | SCREENNAME QUOTED_STRING
 313           {
 314             int len;
 315
 316             len = strlen ($2);
 317             if (len >= NLM_MAX_SCREEN_NAME_LENGTH)
 318               {
 319                 nlmheader_warn (_("screen name is too long"),
 320                                 NLM_MAX_SCREEN_NAME_LENGTH);
 321                 len = NLM_MAX_SCREEN_NAME_LENGTH;
 322               }
 323             var_hdr->screenNameLength = len;
 324             strncpy (var_hdr->screenName, $2, len);
 325             var_hdr->screenName[NLM_MAX_SCREEN_NAME_LENGTH] = '\0';
 326             free ($2);
 327           }
 328         | SHARELIB STRING
 329           {
 330             sharelib_file = $2;
 331           }
 332         | STACK STRING
 333           {
 334             var_hdr->stackSize = nlmlex_get_number ($2);
 335             free ($2);
 336           }
 337         | START STRING
 338           {
 339             start_procedure = $2;
 340           }
 341         | SYNCHRONIZE
 342           {
 343             fixed_hdr->flags |= 0x4;
 344           }
 345         | THREADNAME QUOTED_STRING
 346           {
 347             int len;
 348
 349             len = strlen ($2);
 350             if (len >= NLM_MAX_THREAD_NAME_LENGTH)
 351               {
 352                 nlmheader_warn (_("thread name is too long"),
 353                                 NLM_MAX_THREAD_NAME_LENGTH);
 354                 len = NLM_MAX_THREAD_NAME_LENGTH;
 355               }
 356             var_hdr->threadNameLength = len;
 357             strncpy (var_hdr->threadName, $2, len);
 358             var_hdr->threadName[len] = '\0';
 359             free ($2);
 360           }
 361         | TYPE STRING
 362           {
 363             fixed_hdr->moduleType = nlmlex_get_number ($2);
 364             free ($2);
 365           }
 366         | VERBOSE
 367           {
 368             verbose = TRUE;
 369           }
 370         | VERSIONK STRING STRING STRING
 371           {
 372             long val;
 373
 374             strncpy (version_hdr->stamp, "VeRsIoN#", 8);
 375             version_hdr->majorVersion = nlmlex_get_number ($2);
 376             val = nlmlex_get_number ($3);
 377             if (val < 0 || val > 99)
 378               nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
 379                               -1);
 380             else
 381               version_hdr->minorVersion = val;
 382             val = nlmlex_get_number ($4);
 383             if (val < 0)
 384               nlmheader_warn (_("illegal revision number (must be between 0 and 26)"),
 385                               -1);
 386             else if (val > 26)
 387               version_hdr->revision = 0;
 388             else
 389               version_hdr->revision = val;
 390             free ($2);
 391             free ($3);
 392             free ($4);
 393           }
 394         | VERSIONK STRING STRING
 395           {
 396             long val;
 397
 398             strncpy (version_hdr->stamp, "VeRsIoN#", 8);
 399             version_hdr->majorVersion = nlmlex_get_number ($2);
 400             val = nlmlex_get_number ($3);
 401             if (val < 0 || val > 99)
 402               nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
 403                               -1);
 404             else
 405               version_hdr->minorVersion = val;
 406             version_hdr->revision = 0;
 407             free ($2);
 408             free ($3);
 409           }
 410         | XDCDATA STRING
 411           {
 412             rpc_file = $2;
 413           }
 414         ;
 415
 416 /* A possibly empty list of symbols.  */
 417
 418 symbol_list_opt:
 419           /* Empty.  */
 420           {
 421             $$ = NULL;
 422           }
 423         | symbol_list
 424           {
 425             $$ = $1;
 426           }
 427         ;
 428
 429 /* A list of symbols in an import or export list.  Prefixes may appear
 430    in parentheses.  We need to use left recursion here to avoid
 431    building up a large import list on the parser stack.  */
 432
 433 symbol_list:
 434           symbol
 435           {
 436             $$ = string_list_cons ($1, NULL);
 437           }
 438         | symbol_prefix
 439           {
 440             $$ = NULL;
 441           }
 442         | symbol_list symbol
 443           {
 444             $$ = string_list_append1 ($1, $2);
 445           }
 446         | symbol_list symbol_prefix
 447           {
 448             $$ = $1;
 449           }
 450         ;
 451
 452 /* A prefix for subsequent symbols.  */
 453
 454 symbol_prefix:
 455           '(' STRING ')'
 456           {
 457             if (symbol_prefix != NULL)
 458               free (symbol_prefix);
 459             symbol_prefix = $2;
 460           }
 461         ;
 462
 463 /* A single symbol.  */
 464
 465 symbol:
 466           STRING
 467           {
 468             if (symbol_prefix == NULL)
 469               $$ = $1;
 470             else
 471               {
 472                 $$ = xmalloc (strlen (symbol_prefix) + strlen ($1) + 2);
 473                 sprintf ($$, "%s@%s", symbol_prefix, $1);
 474                 free ($1);
 475               }
 476           }
 477         ;
 478
 479 /* A list of strings.  */
 480
 481 string_list:
 482           /* May be empty.  */
 483           {
 484             $$ = NULL;
 485           }
 486         | STRING string_list
 487           {
 488             $$ = string_list_cons ($1, $2);
 489           }
 490         ;
 491
 492 %%
 493
 494 /* If strerror is just a macro, we want to use the one from libiberty
 495    since it will handle undefined values.  */
 496 #undef strerror
 497 extern char *strerror PARAMS ((int));
 498
 499 /* The lexer is simple, too simple for flex.  Keywords are only
 500    recognized at the start of lines.  Everything else must be an
 501    argument.  A comma is treated as whitespace.  */
 502
 503 /* The states the lexer can be in.  */
 504
 505 enum lex_state
 506 {
 507   /* At the beginning of a line.  */
 508   BEGINNING_OF_LINE,
 509   /* In the middle of a line.  */
 510   IN_LINE
 511 };
 512
 513 /* We need to keep a stack of files to handle file inclusion.  */
 514
 515 struct input
 516 {
 517   /* The file to read from.  */
 518   FILE *file;
 519   /* The name of the file.  */
 520   char *name;
 521   /* The current line number.  */
 522   int lineno;
 523   /* The current state.  */
 524   enum lex_state state;
 525   /* The next file on the stack.  */
 526   struct input *next;
 527 };
 528
 529 /* The current input file.  */
 530
 531 static struct input current;
 532
 533 /* The character which introduces comments.  */
 534 #define COMMENT_CHAR '#'
 535 \f
 536 /* Start the lexer going on the main input file.  */
 537
 538 bfd_boolean
 539 nlmlex_file (const char *name)
 540 {
 541   current.next = NULL;
 542   return nlmlex_file_open (name);
 543 }
 544
 545 /* Start the lexer going on a subsidiary input file.  */
 546
 547 static void
 548 nlmlex_file_push (const char *name)
 549 {
 550   struct input *push;
 551
 552   push = (struct input *) xmalloc (sizeof (struct input));
 553   *push = current;
 554   if (nlmlex_file_open (name))
 555     current.next = push;
 556   else
 557     {
 558       current = *push;
 559       free (push);
 560     }
 561 }
 562
 563 /* Start lexing from a file.  */
 564
 565 static bfd_boolean
 566 nlmlex_file_open (const char *name)
 567 {
 568   current.file = fopen (name, "r");
 569   if (current.file == NULL)
 570     {
 571       fprintf (stderr, "%s:%s: %s\n", program_name, name, strerror (errno));
 572       ++parse_errors;
 573       return FALSE;
 574     }
 575   current.name = xstrdup (name);
 576   current.lineno = 1;
 577   current.state = BEGINNING_OF_LINE;
 578   return TRUE;
 579 }
 580 \f
 581 /* Table used to turn keywords into tokens.  */
 582
 583 struct keyword_tokens_struct
 584 {
 585   const char *keyword;
 586   int token;
 587 };
 588
 589 struct keyword_tokens_struct keyword_tokens[] =
 590 {
 591   { "CHECK", CHECK },
 592   { "CODESTART", CODESTART },
 593   { "COPYRIGHT", COPYRIGHT },
 594   { "CUSTOM", CUSTOM },
 595   { "DATE", DATE },
 596   { "DEBUG", DEBUG },
 597   { "DESCRIPTION", DESCRIPTION },
 598   { "EXIT", EXIT },
 599   { "EXPORT", EXPORT },
 600   { "FLAG_ON", FLAG_ON },
 601   { "FLAG_OFF", FLAG_OFF },
 602   { "FULLMAP", FULLMAP },
 603   { "HELP", HELP },
 604   { "IMPORT", IMPORT },
 605   { "INPUT", INPUT },
 606   { "MAP", MAP },
 607   { "MESSAGES", MESSAGES },
 608   { "MODULE", MODULE },
 609   { "MULTIPLE", MULTIPLE },
 610   { "OS_DOMAIN", OS_DOMAIN },
 611   { "OUTPUT", OUTPUT },
 612   { "PSEUDOPREEMPTION", PSEUDOPREEMPTION },
 613   { "REENTRANT", REENTRANT },
 614   { "SCREENNAME", SCREENNAME },
 615   { "SHARELIB", SHARELIB },
 616   { "STACK", STACK },
 617   { "STACKSIZE", STACK },
 618   { "START", START },
 619   { "SYNCHRONIZE", SYNCHRONIZE },
 620   { "THREADNAME", THREADNAME },
 621   { "TYPE", TYPE },
 622   { "VERBOSE", VERBOSE },
 623   { "VERSION", VERSIONK },
 624   { "XDCDATA", XDCDATA }
 625 };
 626
 627 #define KEYWORD_COUNT (sizeof (keyword_tokens) / sizeof (keyword_tokens[0]))
 628 \f
 629 /* The lexer accumulates strings in these variables.  */
 630 static char *lex_buf;
 631 static int lex_size;
 632 static int lex_pos;
 633
 634 /* Start accumulating strings into the buffer.  */
 635 #define BUF_INIT() \
 636   ((void) (lex_buf != NULL ? lex_pos = 0 : nlmlex_buf_init ()))
 637
 638 static int
 639 nlmlex_buf_init (void)
 640 {
 641   lex_size = 10;
 642   lex_buf = xmalloc (lex_size + 1);
 643   lex_pos = 0;
 644   return 0;
 645 }
 646
 647 /* Finish a string in the buffer.  */
 648 #define BUF_FINISH() ((void) (lex_buf[lex_pos] = '\0'))
 649
 650 /* Accumulate a character into the buffer.  */
 651 #define BUF_ADD(c) \
 652   ((void) (lex_pos < lex_size \
 653            ? lex_buf[lex_pos++] = (c) \
 654            : nlmlex_buf_add (c)))
 655
 656 static char
 657 nlmlex_buf_add (int c)
 658 {
 659   if (lex_pos >= lex_size)
 660     {
 661       lex_size *= 2;
 662       lex_buf = xrealloc (lex_buf, lex_size + 1);
 663     }
 664
 665   return lex_buf[lex_pos++] = c;
 666 }
 667 \f
 668 /* The lexer proper.  This is called by the bison generated parsing
 669    code.  */
 670
 671 static int
 672 yylex (void)
 673 {
 674   int c;
 675
 676 tail_recurse:
 677
 678   c = getc (current.file);
 679
 680   /* Commas are treated as whitespace characters.  */
 681   while (ISSPACE (c) || c == ',')
 682     {
 683       current.state = IN_LINE;
 684       if (c == '\n')
 685         {
 686           ++current.lineno;
 687           current.state = BEGINNING_OF_LINE;
 688         }
 689       c = getc (current.file);
 690     }
 691
 692   /* At the end of the file we either pop to the previous file or
 693      finish up.  */
 694   if (c == EOF)
 695     {
 696       fclose (current.file);
 697       free (current.name);
 698       if (current.next == NULL)
 699         return 0;
 700       else
 701         {
 702           struct input *next;
 703
 704           next = current.next;
 705           current = *next;
 706           free (next);
 707           goto tail_recurse;
 708         }
 709     }
 710
 711   /* A comment character always means to drop everything until the
 712      next newline.  */
 713   if (c == COMMENT_CHAR)
 714     {
 715       do
 716         {
 717           c = getc (current.file);
 718         }
 719       while (c != '\n');
 720       ++current.lineno;
 721       current.state = BEGINNING_OF_LINE;
 722       goto tail_recurse;
 723     }
 724
 725   /* An '@' introduces an include file.  */
 726   if (c == '@')
 727     {
 728       do
 729         {
 730           c = getc (current.file);
 731           if (c == '\n')
 732             ++current.lineno;
 733         }
 734       while (ISSPACE (c));
 735       BUF_INIT ();
 736       while (! ISSPACE (c) && c != EOF)
 737         {
 738           BUF_ADD (c);
 739           c = getc (current.file);
 740         }
 741       BUF_FINISH ();
 742
 743       ungetc (c, current.file);
 744
 745       nlmlex_file_push (lex_buf);
 746       goto tail_recurse;
 747     }
 748
 749   /* A non-space character at the start of a line must be the start of
 750      a keyword.  */
 751   if (current.state == BEGINNING_OF_LINE)
 752     {
 753       BUF_INIT ();
 754       while (ISALNUM (c) || c == '_')
 755         {
 756           BUF_ADD (TOUPPER (c));
 757           c = getc (current.file);
 758         }
 759       BUF_FINISH ();
 760
 761       if (c != EOF && ! ISSPACE (c) && c != ',')
 762         {
 763           nlmheader_identify ();
 764           fprintf (stderr, _("%s:%d: illegal character in keyword: %c\n"),
 765                    current.name, current.lineno, c);
 766         }
 767       else
 768         {
 769           unsigned int i;
 770
 771           for (i = 0; i < KEYWORD_COUNT; i++)
 772             {
 773               if (lex_buf[0] == keyword_tokens[i].keyword[0]
 774                   && strcmp (lex_buf, keyword_tokens[i].keyword) == 0)
 775                 {
 776                   /* Pushing back the final whitespace avoids worrying
 777                      about \n here.  */
 778                   ungetc (c, current.file);
 779                   current.state = IN_LINE;
 780                   return keyword_tokens[i].token;
 781                 }
 782             }
 783
 784           nlmheader_identify ();
 785           fprintf (stderr, _("%s:%d: unrecognized keyword: %s\n"),
 786                    current.name, current.lineno, lex_buf);
 787         }
 788
 789       ++parse_errors;
 790       /* Treat the rest of this line as a comment.  */
 791       ungetc (COMMENT_CHAR, current.file);
 792       goto tail_recurse;
 793     }
 794
 795   /* Parentheses just represent themselves.  */
 796   if (c == '(' || c == ')')
 797     return c;
 798
 799   /* Handle quoted strings.  */
 800   if (c == '"' || c == '\'')
 801     {
 802       int quote;
 803       int start_lineno;
 804
 805       quote = c;
 806       start_lineno = current.lineno;
 807
 808       c = getc (current.file);
 809       BUF_INIT ();
 810       while (c != quote && c != EOF)
 811         {
 812           BUF_ADD (c);
 813           if (c == '\n')
 814             ++current.lineno;
 815           c = getc (current.file);
 816         }
 817       BUF_FINISH ();
 818
 819       if (c == EOF)
 820         {
 821           nlmheader_identify ();
 822           fprintf (stderr, _("%s:%d: end of file in quoted string\n"),
 823                    current.name, start_lineno);
 824           ++parse_errors;
 825         }
 826
 827       /* FIXME: Possible memory leak.  */
 828       yylval.string = xstrdup (lex_buf);
 829       return QUOTED_STRING;
 830     }
 831
 832   /* Gather a generic argument.  */
 833   BUF_INIT ();
 834   while (! ISSPACE (c)
 835          && c != ','
 836          && c != COMMENT_CHAR
 837          && c != '('
 838          && c != ')')
 839     {
 840       BUF_ADD (c);
 841       c = getc (current.file);
 842     }
 843   BUF_FINISH ();
 844
 845   ungetc (c, current.file);
 846
 847   /* FIXME: Possible memory leak.  */
 848   yylval.string = xstrdup (lex_buf);
 849   return STRING;
 850 }
 851 \f
 852 /* Get a number from a string.  */
 853
 854 static long
 855 nlmlex_get_number (const char *s)
 856 {
 857   long ret;
 858   char *send;
 859
 860   ret = strtol (s, &send, 10);
 861   if (*send != '\0')
 862     nlmheader_warn (_("bad number"), -1);
 863   return ret;
 864 }
 865
 866 /* Prefix the nlmconv warnings with a note as to where they come from.
 867    We don't use program_name on every warning, because then some
 868    versions of the emacs next-error function can't recognize the line
 869    number.  */
 870
 871 static void
 872 nlmheader_identify (void)
 873 {
 874   static int done;
 875
 876   if (! done)
 877     {
 878       fprintf (stderr, _("%s: problems in NLM command language input:\n"),
 879                program_name);
 880       done = 1;
 881     }
 882 }
 883
 884 /* Issue a warning.  */
 885
 886 static void
 887 nlmheader_warn (const char *s, int imax)
 888 {
 889   nlmheader_identify ();
 890   fprintf (stderr, "%s:%d: %s", current.name, current.lineno, s);
 891   if (imax != -1)
 892     fprintf (stderr, " (max %d)", imax);
 893   fprintf (stderr, "\n");
 894 }
 895
 896 /* Report an error.  */
 897
 898 static void
 899 nlmheader_error (const char *s)
 900 {
 901   nlmheader_warn (s, -1);
 902   ++parse_errors;
 903 }
 904
 905 /* Add a string to a string list.  */
 906
 907 static struct string_list *
 908 string_list_cons (char *s, struct string_list *l)
 909 {
 910   struct string_list *ret;
 911
 912   ret = (struct string_list *) xmalloc (sizeof (struct string_list));
 913   ret->next = l;
 914   ret->string = s;
 915   return ret;
 916 }
 917
 918 /* Append a string list to another string list.  */
 919
 920 static struct string_list *
 921 string_list_append (struct string_list *l1, struct string_list *l2)
 922 {
 923   register struct string_list **pp;
 924
 925   for (pp = &l1; *pp != NULL; pp = &(*pp)->next)
 926     ;
 927   *pp = l2;
 928   return l1;
 929 }
 930
 931 /* Append a string to a string list.  */
 932
 933 static struct string_list *
 934 string_list_append1 (struct string_list *l, char *s)
 935 {
 936   struct string_list *n;
 937   register struct string_list **pp;
 938
 939   n = (struct string_list *) xmalloc (sizeof (struct string_list));
 940   n->next = NULL;
 941   n->string = s;
 942   for (pp = &l; *pp != NULL; pp = &(*pp)->next)
 943     ;
 944   *pp = n;
 945   return l;
 946 }
 947
 948 /* Duplicate a string in memory.  */
 949
 950 static char *
 951 xstrdup (const char *s)
 952 {
 953   unsigned long len;
 954   char *ret;
 955
 956   len = strlen (s);
 957   ret = xmalloc (len + 1);
 958   strcpy (ret, s);
 959   return ret;
 960 }