binutils/nlmheader.y

   1 %{/* nlmheader.y - parse NLM header specification keywords.
   2      Copyright 1993, 1994, 1995, 1997, 1998, 2001, 2002
   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 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 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 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 PARAMS ((void));
  95 static void nlmlex_file_push PARAMS ((const char *));
  96 static boolean nlmlex_file_open PARAMS ((const char *));
  97 static int nlmlex_buf_init PARAMS ((void));
  98 static char nlmlex_buf_add PARAMS ((int));
  99 static long nlmlex_get_number PARAMS ((const char *));
 100 static void nlmheader_identify PARAMS ((void));
 101 static void nlmheader_warn PARAMS ((const char *, int));
 102 static void nlmheader_error PARAMS ((const char *));
 103 static struct string_list * string_list_cons PARAMS ((char *,
 104                                                       struct string_list *));
 105 static struct string_list * string_list_append PARAMS ((struct string_list *,
 106                                                         struct string_list *));
 107 static struct string_list * string_list_append1 PARAMS ((struct string_list *,
 108                                                          char *));
 109 static char *xstrdup PARAMS ((const char *));
 110
 111 %}
 112
 113 %union
 114 {
 115   char *string;
 116   struct string_list *list;
 117 };
 118
 119 /* The reserved words.  */
 120
 121 %token CHECK CODESTART COPYRIGHT CUSTOM DATE DEBUG DESCRIPTION EXIT
 122 %token EXPORT FLAG_ON FLAG_OFF FULLMAP HELP IMPORT INPUT MAP MESSAGES
 123 %token MODULE MULTIPLE OS_DOMAIN OUTPUT PSEUDOPREEMPTION REENTRANT
 124 %token SCREENNAME SHARELIB STACK START SYNCHRONIZE
 125 %token THREADNAME TYPE VERBOSE VERSIONK XDCDATA
 126
 127 /* Arguments.  */
 128
 129 %token <string> STRING
 130 %token <string> QUOTED_STRING
 131
 132 /* Typed non-terminals.  */
 133 %type <list> symbol_list_opt symbol_list string_list
 134 %type <string> symbol
 135
 136 %%
 137
 138 /* Keywords must start in the leftmost column of the file.  Arguments
 139    may appear anywhere else.  The lexer uses this to determine what
 140    token to return, so we don't have to worry about it here.  */
 141
 142 /* The entire file is just a list of commands.  */
 143
 144 file:
 145           commands
 146         ;
 147
 148 /* A possibly empty list of commands.  */
 149
 150 commands:
 151           /* May be empty.  */
 152         | command commands
 153         ;
 154
 155 /* A single command.  There is where most of the work takes place.  */
 156
 157 command:
 158           CHECK STRING
 159           {
 160             check_procedure = $2;
 161           }
 162         | CODESTART STRING
 163           {
 164             nlmheader_warn (_("CODESTART is not implemented; sorry"), -1);
 165             free ($2);
 166           }
 167         | COPYRIGHT QUOTED_STRING
 168           {
 169             int len;
 170
 171             strncpy (copyright_hdr->stamp, "CoPyRiGhT=", 10);
 172             len = strlen ($2);
 173             if (len >= NLM_MAX_COPYRIGHT_MESSAGE_LENGTH)
 174               {
 175                 nlmheader_warn (_("copyright string is too long"),
 176                                 NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1);
 177                 len = NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1;
 178               }
 179             copyright_hdr->copyrightMessageLength = len;
 180             strncpy (copyright_hdr->copyrightMessage, $2, len);
 181             copyright_hdr->copyrightMessage[len] = '\0';
 182             free ($2);
 183           }
 184         | CUSTOM STRING
 185           {
 186             custom_file = $2;
 187           }
 188         | DATE STRING STRING STRING
 189           {
 190             /* We don't set the version stamp here, because we use the
 191                version stamp to detect whether the required VERSION
 192                keyword was given.  */
 193             version_hdr->month = nlmlex_get_number ($2);
 194             version_hdr->day = nlmlex_get_number ($3);
 195             version_hdr->year = nlmlex_get_number ($4);
 196             free ($2);
 197             free ($3);
 198             free ($4);
 199             if (version_hdr->month < 1 || version_hdr->month > 12)
 200               nlmheader_warn (_("illegal month"), -1);
 201             if (version_hdr->day < 1 || version_hdr->day > 31)
 202               nlmheader_warn (_("illegal day"), -1);
 203             if (version_hdr->year < 1900 || version_hdr->year > 3000)
 204               nlmheader_warn (_("illegal year"), -1);
 205           }
 206         | DEBUG
 207           {
 208             debug_info = true;
 209           }
 210         | DESCRIPTION QUOTED_STRING
 211           {
 212             int len;
 213
 214             len = strlen ($2);
 215             if (len > NLM_MAX_DESCRIPTION_LENGTH)
 216               {
 217                 nlmheader_warn (_("description string is too long"),
 218                                 NLM_MAX_DESCRIPTION_LENGTH);
 219                 len = NLM_MAX_DESCRIPTION_LENGTH;
 220               }
 221             var_hdr->descriptionLength = len;
 222             strncpy (var_hdr->descriptionText, $2, len);
 223             var_hdr->descriptionText[len] = '\0';
 224             free ($2);
 225           }
 226         | EXIT STRING
 227           {
 228             exit_procedure = $2;
 229           }
 230         | EXPORT
 231           {
 232             symbol_prefix = NULL;
 233           }
 234           symbol_list_opt
 235           {
 236             export_symbols = string_list_append (export_symbols, $3);
 237           }
 238         | FLAG_ON STRING
 239           {
 240             fixed_hdr->flags |= nlmlex_get_number ($2);
 241             free ($2);
 242           }
 243         | FLAG_OFF STRING
 244           {
 245             fixed_hdr->flags &=~ nlmlex_get_number ($2);
 246             free ($2);
 247           }
 248         | FULLMAP
 249           {
 250             map_file = "";
 251             full_map = true;
 252           }
 253         | FULLMAP STRING
 254           {
 255             map_file = $2;
 256             full_map = true;
 257           }
 258         | HELP STRING
 259           {
 260             help_file = $2;
 261           }
 262         | IMPORT
 263           {
 264             symbol_prefix = NULL;
 265           }
 266           symbol_list_opt
 267           {
 268             import_symbols = string_list_append (import_symbols, $3);
 269           }
 270         | INPUT string_list
 271           {
 272             input_files = string_list_append (input_files, $2);
 273           }
 274         | MAP
 275           {
 276             map_file = "";
 277           }
 278         | MAP STRING
 279           {
 280             map_file = $2;
 281           }
 282         | MESSAGES STRING
 283           {
 284             message_file = $2;
 285           }
 286         | MODULE string_list
 287           {
 288             modules = string_list_append (modules, $2);
 289           }
 290         | MULTIPLE
 291           {
 292             fixed_hdr->flags |= 0x2;
 293           }
 294         | OS_DOMAIN
 295           {
 296             fixed_hdr->flags |= 0x10;
 297           }
 298         | OUTPUT STRING
 299           {
 300             if (output_file == NULL)
 301               output_file = $2;
 302             else
 303               nlmheader_warn (_("ignoring duplicate OUTPUT statement"), -1);
 304           }
 305         | PSEUDOPREEMPTION
 306           {
 307             fixed_hdr->flags |= 0x8;
 308           }
 309         | REENTRANT
 310           {
 311             fixed_hdr->flags |= 0x1;
 312           }
 313         | SCREENNAME QUOTED_STRING
 314           {
 315             int len;
 316
 317             len = strlen ($2);
 318             if (len >= NLM_MAX_SCREEN_NAME_LENGTH)
 319               {
 320                 nlmheader_warn (_("screen name is too long"),
 321                                 NLM_MAX_SCREEN_NAME_LENGTH);
 322                 len = NLM_MAX_SCREEN_NAME_LENGTH;
 323               }
 324             var_hdr->screenNameLength = len;
 325             strncpy (var_hdr->screenName, $2, len);
 326             var_hdr->screenName[NLM_MAX_SCREEN_NAME_LENGTH] = '\0';
 327             free ($2);
 328           }
 329         | SHARELIB STRING
 330           {
 331             sharelib_file = $2;
 332           }
 333         | STACK STRING
 334           {
 335             var_hdr->stackSize = nlmlex_get_number ($2);
 336             free ($2);
 337           }
 338         | START STRING
 339           {
 340             start_procedure = $2;
 341           }
 342         | SYNCHRONIZE
 343           {
 344             fixed_hdr->flags |= 0x4;
 345           }
 346         | THREADNAME QUOTED_STRING
 347           {
 348             int len;
 349
 350             len = strlen ($2);
 351             if (len >= NLM_MAX_THREAD_NAME_LENGTH)
 352               {
 353                 nlmheader_warn (_("thread name is too long"),
 354                                 NLM_MAX_THREAD_NAME_LENGTH);
 355                 len = NLM_MAX_THREAD_NAME_LENGTH;
 356               }
 357             var_hdr->threadNameLength = len;
 358             strncpy (var_hdr->threadName, $2, len);
 359             var_hdr->threadName[len] = '\0';
 360             free ($2);
 361           }
 362         | TYPE STRING
 363           {
 364             fixed_hdr->moduleType = nlmlex_get_number ($2);
 365             free ($2);
 366           }
 367         | VERBOSE
 368           {
 369             verbose = true;
 370           }
 371         | VERSIONK STRING STRING STRING
 372           {
 373             long val;
 374
 375             strncpy (version_hdr->stamp, "VeRsIoN#", 8);
 376             version_hdr->majorVersion = nlmlex_get_number ($2);
 377             val = nlmlex_get_number ($3);
 378             if (val < 0 || val > 99)
 379               nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
 380                               -1);
 381             else
 382               version_hdr->minorVersion = val;
 383             val = nlmlex_get_number ($4);
 384             if (val < 0)
 385               nlmheader_warn (_("illegal revision number (must be between 0 and 26)"),
 386                               -1);
 387             else if (val > 26)
 388               version_hdr->revision = 0;
 389             else
 390               version_hdr->revision = val;
 391             free ($2);
 392             free ($3);
 393             free ($4);
 394           }
 395         | VERSIONK STRING STRING
 396           {
 397             long val;
 398
 399             strncpy (version_hdr->stamp, "VeRsIoN#", 8);
 400             version_hdr->majorVersion = nlmlex_get_number ($2);
 401             val = nlmlex_get_number ($3);
 402             if (val < 0 || val > 99)
 403               nlmheader_warn (_("illegal minor version number (must be between 0 and 99)"),
 404                               -1);
 405             else
 406               version_hdr->minorVersion = val;
 407             version_hdr->revision = 0;
 408             free ($2);
 409             free ($3);
 410           }
 411         | XDCDATA STRING
 412           {
 413             rpc_file = $2;
 414           }
 415         ;
 416
 417 /* A possibly empty list of symbols.  */
 418
 419 symbol_list_opt:
 420           /* Empty.  */
 421           {
 422             $$ = NULL;
 423           }
 424         | symbol_list
 425           {
 426             $$ = $1;
 427           }
 428         ;
 429
 430 /* A list of symbols in an import or export list.  Prefixes may appear
 431    in parentheses.  We need to use left recursion here to avoid
 432    building up a large import list on the parser stack.  */
 433
 434 symbol_list:
 435           symbol
 436           {
 437             $$ = string_list_cons ($1, NULL);
 438           }
 439         | symbol_prefix
 440           {
 441             $$ = NULL;
 442           }
 443         | symbol_list symbol
 444           {
 445             $$ = string_list_append1 ($1, $2);
 446           }
 447         | symbol_list symbol_prefix
 448           {
 449             $$ = $1;
 450           }
 451         ;
 452
 453 /* A prefix for subsequent symbols.  */
 454
 455 symbol_prefix:
 456           '(' STRING ')'
 457           {
 458             if (symbol_prefix != NULL)
 459               free (symbol_prefix);
 460             symbol_prefix = $2;
 461           }
 462         ;
 463
 464 /* A single symbol.  */
 465
 466 symbol:
 467           STRING
 468           {
 469             if (symbol_prefix == NULL)
 470               $$ = $1;
 471             else
 472               {
 473                 $$ = xmalloc (strlen (symbol_prefix) + strlen ($1) + 2);
 474                 sprintf ($$, "%s@%s", symbol_prefix, $1);
 475                 free ($1);
 476               }
 477           }
 478         ;
 479
 480 /* A list of strings.  */
 481
 482 string_list:
 483           /* May be empty.  */
 484           {
 485             $$ = NULL;
 486           }
 487         | STRING string_list
 488           {
 489             $$ = string_list_cons ($1, $2);
 490           }
 491         ;
 492
 493 %%
 494
 495 /* If strerror is just a macro, we want to use the one from libiberty
 496    since it will handle undefined values.  */
 497 #undef strerror
 498 extern char *strerror PARAMS ((int));
 499
 500 /* The lexer is simple, too simple for flex.  Keywords are only
 501    recognized at the start of lines.  Everything else must be an
 502    argument.  A comma is treated as whitespace.  */
 503
 504 /* The states the lexer can be in.  */
 505
 506 enum lex_state
 507 {
 508   /* At the beginning of a line.  */
 509   BEGINNING_OF_LINE,
 510   /* In the middle of a line.  */
 511   IN_LINE
 512 };
 513
 514 /* We need to keep a stack of files to handle file inclusion.  */
 515
 516 struct input
 517 {
 518   /* The file to read from.  */
 519   FILE *file;
 520   /* The name of the file.  */
 521   char *name;
 522   /* The current line number.  */
 523   int lineno;
 524   /* The current state.  */
 525   enum lex_state state;
 526   /* The next file on the stack.  */
 527   struct input *next;
 528 };
 529
 530 /* The current input file.  */
 531
 532 static struct input current;
 533
 534 /* The character which introduces comments.  */
 535 #define COMMENT_CHAR '#'
 536 \f
 537 /* Start the lexer going on the main input file.  */
 538
 539 boolean
 540 nlmlex_file (name)
 541      const char *name;
 542 {
 543   current.next = NULL;
 544   return nlmlex_file_open (name);
 545 }
 546
 547 /* Start the lexer going on a subsidiary input file.  */
 548
 549 static void
 550 nlmlex_file_push (name)
 551      const char *name;
 552 {
 553   struct input *push;
 554
 555   push = (struct input *) xmalloc (sizeof (struct input));
 556   *push = current;
 557   if (nlmlex_file_open (name))
 558     current.next = push;
 559   else
 560     {
 561       current = *push;
 562       free (push);
 563     }
 564 }
 565
 566 /* Start lexing from a file.  */
 567
 568 static boolean
 569 nlmlex_file_open (name)
 570      const char *name;
 571 {
 572   current.file = fopen (name, "r");
 573   if (current.file == NULL)
 574     {
 575       fprintf (stderr, "%s:%s: %s\n", program_name, name, strerror (errno));
 576       ++parse_errors;
 577       return false;
 578     }
 579   current.name = xstrdup (name);
 580   current.lineno = 1;
 581   current.state = BEGINNING_OF_LINE;
 582   return true;
 583 }
 584 \f
 585 /* Table used to turn keywords into tokens.  */
 586
 587 struct keyword_tokens_struct
 588 {
 589   const char *keyword;
 590   int token;
 591 };
 592
 593 struct keyword_tokens_struct keyword_tokens[] =
 594 {
 595   { "CHECK", CHECK },
 596   { "CODESTART", CODESTART },
 597   { "COPYRIGHT", COPYRIGHT },
 598   { "CUSTOM", CUSTOM },
 599   { "DATE", DATE },
 600   { "DEBUG", DEBUG },
 601   { "DESCRIPTION", DESCRIPTION },
 602   { "EXIT", EXIT },
 603   { "EXPORT", EXPORT },
 604   { "FLAG_ON", FLAG_ON },
 605   { "FLAG_OFF", FLAG_OFF },
 606   { "FULLMAP", FULLMAP },
 607   { "HELP", HELP },
 608   { "IMPORT", IMPORT },
 609   { "INPUT", INPUT },
 610   { "MAP", MAP },
 611   { "MESSAGES", MESSAGES },
 612   { "MODULE", MODULE },
 613   { "MULTIPLE", MULTIPLE },
 614   { "OS_DOMAIN", OS_DOMAIN },
 615   { "OUTPUT", OUTPUT },
 616   { "PSEUDOPREEMPTION", PSEUDOPREEMPTION },
 617   { "REENTRANT", REENTRANT },
 618   { "SCREENNAME", SCREENNAME },
 619   { "SHARELIB", SHARELIB },
 620   { "STACK", STACK },
 621   { "STACKSIZE", STACK },
 622   { "START", START },
 623   { "SYNCHRONIZE", SYNCHRONIZE },
 624   { "THREADNAME", THREADNAME },
 625   { "TYPE", TYPE },
 626   { "VERBOSE", VERBOSE },
 627   { "VERSION", VERSIONK },
 628   { "XDCDATA", XDCDATA }
 629 };
 630
 631 #define KEYWORD_COUNT (sizeof (keyword_tokens) / sizeof (keyword_tokens[0]))
 632 \f
 633 /* The lexer accumulates strings in these variables.  */
 634 static char *lex_buf;
 635 static int lex_size;
 636 static int lex_pos;
 637
 638 /* Start accumulating strings into the buffer.  */
 639 #define BUF_INIT() \
 640   ((void) (lex_buf != NULL ? lex_pos = 0 : nlmlex_buf_init ()))
 641
 642 static int
 643 nlmlex_buf_init ()
 644 {
 645   lex_size = 10;
 646   lex_buf = xmalloc (lex_size + 1);
 647   lex_pos = 0;
 648   return 0;
 649 }
 650
 651 /* Finish a string in the buffer.  */
 652 #define BUF_FINISH() ((void) (lex_buf[lex_pos] = '\0'))
 653
 654 /* Accumulate a character into the buffer.  */
 655 #define BUF_ADD(c) \
 656   ((void) (lex_pos < lex_size \
 657            ? lex_buf[lex_pos++] = (c) \
 658            : nlmlex_buf_add (c)))
 659
 660 static char
 661 nlmlex_buf_add (c)
 662      int c;
 663 {
 664   if (lex_pos >= lex_size)
 665     {
 666       lex_size *= 2;
 667       lex_buf = xrealloc (lex_buf, lex_size + 1);
 668     }
 669
 670   return lex_buf[lex_pos++] = c;
 671 }
 672 \f
 673 /* The lexer proper.  This is called by the bison generated parsing
 674    code.  */
 675
 676 static int
 677 yylex ()
 678 {
 679   int c;
 680
 681 tail_recurse:
 682
 683   c = getc (current.file);
 684
 685   /* Commas are treated as whitespace characters.  */
 686   while (ISSPACE (c) || c == ',')
 687     {
 688       current.state = IN_LINE;
 689       if (c == '\n')
 690         {
 691           ++current.lineno;
 692           current.state = BEGINNING_OF_LINE;
 693         }
 694       c = getc (current.file);
 695     }
 696
 697   /* At the end of the file we either pop to the previous file or
 698      finish up.  */
 699   if (c == EOF)
 700     {
 701       fclose (current.file);
 702       free (current.name);
 703       if (current.next == NULL)
 704         return 0;
 705       else
 706         {
 707           struct input *next;
 708
 709           next = current.next;
 710           current = *next;
 711           free (next);
 712           goto tail_recurse;
 713         }
 714     }
 715
 716   /* A comment character always means to drop everything until the
 717      next newline.  */
 718   if (c == COMMENT_CHAR)
 719     {
 720       do
 721         {
 722           c = getc (current.file);
 723         }
 724       while (c != '\n');
 725       ++current.lineno;
 726       current.state = BEGINNING_OF_LINE;
 727       goto tail_recurse;
 728     }
 729
 730   /* An '@' introduces an include file.  */
 731   if (c == '@')
 732     {
 733       do
 734         {
 735           c = getc (current.file);
 736           if (c == '\n')
 737             ++current.lineno;
 738         }
 739       while (ISSPACE (c));
 740       BUF_INIT ();
 741       while (! ISSPACE (c) && c != EOF)
 742         {
 743           BUF_ADD (c);
 744           c = getc (current.file);
 745         }
 746       BUF_FINISH ();
 747
 748       ungetc (c, current.file);
 749
 750       nlmlex_file_push (lex_buf);
 751       goto tail_recurse;
 752     }
 753
 754   /* A non-space character at the start of a line must be the start of
 755      a keyword.  */
 756   if (current.state == BEGINNING_OF_LINE)
 757     {
 758       BUF_INIT ();
 759       while (ISALNUM (c) || c == '_')
 760         {
 761           BUF_ADD (TOUPPER (c));
 762           c = getc (current.file);
 763         }
 764       BUF_FINISH ();
 765
 766       if (c != EOF && ! ISSPACE (c) && c != ',')
 767         {
 768           nlmheader_identify ();
 769           fprintf (stderr, _("%s:%d: illegal character in keyword: %c\n"),
 770                    current.name, current.lineno, c);
 771         }
 772       else
 773         {
 774           unsigned int i;
 775
 776           for (i = 0; i < KEYWORD_COUNT; i++)
 777             {
 778               if (lex_buf[0] == keyword_tokens[i].keyword[0]
 779                   && strcmp (lex_buf, keyword_tokens[i].keyword) == 0)
 780                 {
 781                   /* Pushing back the final whitespace avoids worrying
 782                      about \n here.  */
 783                   ungetc (c, current.file);
 784                   current.state = IN_LINE;
 785                   return keyword_tokens[i].token;
 786                 }
 787             }
 788
 789           nlmheader_identify ();
 790           fprintf (stderr, _("%s:%d: unrecognized keyword: %s\n"),
 791                    current.name, current.lineno, lex_buf);
 792         }
 793
 794       ++parse_errors;
 795       /* Treat the rest of this line as a comment.  */
 796       ungetc (COMMENT_CHAR, current.file);
 797       goto tail_recurse;
 798     }
 799
 800   /* Parentheses just represent themselves.  */
 801   if (c == '(' || c == ')')
 802     return c;
 803
 804   /* Handle quoted strings.  */
 805   if (c == '"' || c == '\'')
 806     {
 807       int quote;
 808       int start_lineno;
 809
 810       quote = c;
 811       start_lineno = current.lineno;
 812
 813       c = getc (current.file);
 814       BUF_INIT ();
 815       while (c != quote && c != EOF)
 816         {
 817           BUF_ADD (c);
 818           if (c == '\n')
 819             ++current.lineno;
 820           c = getc (current.file);
 821         }
 822       BUF_FINISH ();
 823
 824       if (c == EOF)
 825         {
 826           nlmheader_identify ();
 827           fprintf (stderr, _("%s:%d: end of file in quoted string\n"),
 828                    current.name, start_lineno);
 829           ++parse_errors;
 830         }
 831
 832       /* FIXME: Possible memory leak.  */
 833       yylval.string = xstrdup (lex_buf);
 834       return QUOTED_STRING;
 835     }
 836
 837   /* Gather a generic argument.  */
 838   BUF_INIT ();
 839   while (! ISSPACE (c)
 840          && c != ','
 841          && c != COMMENT_CHAR
 842          && c != '('
 843          && c != ')')
 844     {
 845       BUF_ADD (c);
 846       c = getc (current.file);
 847     }
 848   BUF_FINISH ();
 849
 850   ungetc (c, current.file);
 851
 852   /* FIXME: Possible memory leak.  */
 853   yylval.string = xstrdup (lex_buf);
 854   return STRING;
 855 }
 856 \f
 857 /* Get a number from a string.  */
 858
 859 static long
 860 nlmlex_get_number (s)
 861      const char *s;
 862 {
 863   long ret;
 864   char *send;
 865
 866   ret = strtol (s, &send, 10);
 867   if (*send != '\0')
 868     nlmheader_warn (_("bad number"), -1);
 869   return ret;
 870 }
 871
 872 /* Prefix the nlmconv warnings with a note as to where they come from.
 873    We don't use program_name on every warning, because then some
 874    versions of the emacs next-error function can't recognize the line
 875    number.  */
 876
 877 static void
 878 nlmheader_identify ()
 879 {
 880   static int done;
 881
 882   if (! done)
 883     {
 884       fprintf (stderr, _("%s: problems in NLM command language input:\n"),
 885                program_name);
 886       done = 1;
 887     }
 888 }
 889
 890 /* Issue a warning.  */
 891
 892 static void
 893 nlmheader_warn (s, imax)
 894      const char *s;
 895      int imax;
 896 {
 897   nlmheader_identify ();
 898   fprintf (stderr, "%s:%d: %s", current.name, current.lineno, s);
 899   if (imax != -1)
 900     fprintf (stderr, " (max %d)", imax);
 901   fprintf (stderr, "\n");
 902 }
 903
 904 /* Report an error.  */
 905
 906 static void
 907 nlmheader_error (s)
 908      const char *s;
 909 {
 910   nlmheader_warn (s, -1);
 911   ++parse_errors;
 912 }
 913
 914 /* Add a string to a string list.  */
 915
 916 static struct string_list *
 917 string_list_cons (s, l)
 918      char *s;
 919      struct string_list *l;
 920 {
 921   struct string_list *ret;
 922
 923   ret = (struct string_list *) xmalloc (sizeof (struct string_list));
 924   ret->next = l;
 925   ret->string = s;
 926   return ret;
 927 }
 928
 929 /* Append a string list to another string list.  */
 930
 931 static struct string_list *
 932 string_list_append (l1, l2)
 933      struct string_list *l1;
 934      struct string_list *l2;
 935 {
 936   register struct string_list **pp;
 937
 938   for (pp = &l1; *pp != NULL; pp = &(*pp)->next)
 939     ;
 940   *pp = l2;
 941   return l1;
 942 }
 943
 944 /* Append a string to a string list.  */
 945
 946 static struct string_list *
 947 string_list_append1 (l, s)
 948      struct string_list *l;
 949      char *s;
 950 {
 951   struct string_list *n;
 952   register struct string_list **pp;
 953
 954   n = (struct string_list *) xmalloc (sizeof (struct string_list));
 955   n->next = NULL;
 956   n->string = s;
 957   for (pp = &l; *pp != NULL; pp = &(*pp)->next)
 958     ;
 959   *pp = n;
 960   return l;
 961 }
 962
 963 /* Duplicate a string in memory.  */
 964
 965 static char *
 966 xstrdup (s)
 967      const char *s;
 968 {
 969   unsigned long len;
 970   char *ret;
 971
 972   len = strlen (s);
 973   ret = xmalloc (len + 1);
 974   strcpy (ret, s);
 975   return ret;
 976 }