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1 %{/* nlmheader.y - parse NLM header specification keywords.
2 Copyright 1993, 1994, 1995, 1997, 1998, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of GNU Binutils.
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.
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.
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21 /* Written by Ian Lance Taylor <ian@cygnus.com>.
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.
27 This implementation is based on the description in the NetWare Tool
28 Maker Specification manual, edition 1.0. */
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"
39 /* Information is stored in the structures pointed to by these
40 variables. */
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;
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;
83 /* The number of serious errors that have occurred. */
84 int parse_errors;
86 /* The current symbol prefix when reading a list of import or export
87 symbols. */
88 static char *symbol_prefix;
90 /* Parser error message handler. */
91 #define yyerror(msg) nlmheader_error (msg);
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 *);
112 %union
114 char *string;
115 struct string_list *list;
118 /* The reserved words. */
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
126 /* Arguments. */
128 %token <string> STRING
129 %token <string> QUOTED_STRING
131 /* Typed non-terminals. */
132 %type <list> symbol_list_opt symbol_list string_list
133 %type <string> symbol
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. */
141 /* The entire file is just a list of commands. */
143 file:
144 commands
147 /* A possibly empty list of commands. */
149 commands:
150 /* May be empty. */
151 | command commands
154 /* A single command. There is where most of the work takes place. */
156 command:
157 CHECK STRING
159 check_procedure = $2;
161 | CODESTART STRING
163 nlmheader_warn (_("CODESTART is not implemented; sorry"), -1);
164 free ($2);
166 | COPYRIGHT QUOTED_STRING
168 int len;
170 strncpy (copyright_hdr->stamp, "CoPyRiGhT=", 10);
171 len = strlen ($2);
172 if (len >= NLM_MAX_COPYRIGHT_MESSAGE_LENGTH)
174 nlmheader_warn (_("copyright string is too long"),
175 NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1);
176 len = NLM_MAX_COPYRIGHT_MESSAGE_LENGTH - 1;
178 copyright_hdr->copyrightMessageLength = len;
179 strncpy (copyright_hdr->copyrightMessage, $2, len);
180 copyright_hdr->copyrightMessage[len] = '\0';
181 free ($2);
183 | CUSTOM STRING
185 custom_file = $2;
187 | DATE STRING STRING STRING
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);
205 | DEBUG
207 debug_info = TRUE;
209 | DESCRIPTION QUOTED_STRING
211 int len;
213 len = strlen ($2);
214 if (len > NLM_MAX_DESCRIPTION_LENGTH)
216 nlmheader_warn (_("description string is too long"),
217 NLM_MAX_DESCRIPTION_LENGTH);
218 len = NLM_MAX_DESCRIPTION_LENGTH;
220 var_hdr->descriptionLength = len;
221 strncpy (var_hdr->descriptionText, $2, len);
222 var_hdr->descriptionText[len] = '\0';
223 free ($2);
225 | EXIT STRING
227 exit_procedure = $2;
229 | EXPORT
231 symbol_prefix = NULL;
233 symbol_list_opt
235 export_symbols = string_list_append (export_symbols, $3);
237 | FLAG_ON STRING
239 fixed_hdr->flags |= nlmlex_get_number ($2);
240 free ($2);
242 | FLAG_OFF STRING
244 fixed_hdr->flags &=~ nlmlex_get_number ($2);
245 free ($2);
247 | FULLMAP
249 map_file = "";
250 full_map = TRUE;
252 | FULLMAP STRING
254 map_file = $2;
255 full_map = TRUE;
257 | HELP STRING
259 help_file = $2;
261 | IMPORT
263 symbol_prefix = NULL;
265 symbol_list_opt
267 import_symbols = string_list_append (import_symbols, $3);
269 | INPUT string_list
271 input_files = string_list_append (input_files, $2);
273 | MAP
275 map_file = "";
277 | MAP STRING
279 map_file = $2;
281 | MESSAGES STRING
283 message_file = $2;
285 | MODULE string_list
287 modules = string_list_append (modules, $2);
289 | MULTIPLE
291 fixed_hdr->flags |= 0x2;
293 | OS_DOMAIN
295 fixed_hdr->flags |= 0x10;
297 | OUTPUT STRING
299 if (output_file == NULL)
300 output_file = $2;
301 else
302 nlmheader_warn (_("ignoring duplicate OUTPUT statement"), -1);
304 | PSEUDOPREEMPTION
306 fixed_hdr->flags |= 0x8;
308 | REENTRANT
310 fixed_hdr->flags |= 0x1;
312 | SCREENNAME QUOTED_STRING
314 int len;
316 len = strlen ($2);
317 if (len >= NLM_MAX_SCREEN_NAME_LENGTH)
319 nlmheader_warn (_("screen name is too long"),
320 NLM_MAX_SCREEN_NAME_LENGTH);
321 len = NLM_MAX_SCREEN_NAME_LENGTH;
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);
328 | SHARELIB STRING
330 sharelib_file = $2;
332 | STACK STRING
334 var_hdr->stackSize = nlmlex_get_number ($2);
335 free ($2);
337 | START STRING
339 start_procedure = $2;
341 | SYNCHRONIZE
343 fixed_hdr->flags |= 0x4;
345 | THREADNAME QUOTED_STRING
347 int len;
349 len = strlen ($2);
350 if (len >= NLM_MAX_THREAD_NAME_LENGTH)
352 nlmheader_warn (_("thread name is too long"),
353 NLM_MAX_THREAD_NAME_LENGTH);
354 len = NLM_MAX_THREAD_NAME_LENGTH;
356 var_hdr->threadNameLength = len;
357 strncpy (var_hdr->threadName, $2, len);
358 var_hdr->threadName[len] = '\0';
359 free ($2);
361 | TYPE STRING
363 fixed_hdr->moduleType = nlmlex_get_number ($2);
364 free ($2);
366 | VERBOSE
368 verbose = TRUE;
370 | VERSIONK STRING STRING STRING
372 long val;
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);
394 | VERSIONK STRING STRING
396 long val;
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);
410 | XDCDATA STRING
412 rpc_file = $2;
416 /* A possibly empty list of symbols. */
418 symbol_list_opt:
419 /* Empty. */
421 $$ = NULL;
423 | symbol_list
425 $$ = $1;
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. */
433 symbol_list:
434 symbol
436 $$ = string_list_cons ($1, NULL);
438 | symbol_prefix
440 $$ = NULL;
442 | symbol_list symbol
444 $$ = string_list_append1 ($1, $2);
446 | symbol_list symbol_prefix
448 $$ = $1;
452 /* A prefix for subsequent symbols. */
454 symbol_prefix:
455 '(' STRING ')'
457 if (symbol_prefix != NULL)
458 free (symbol_prefix);
459 symbol_prefix = $2;
463 /* A single symbol. */
465 symbol:
466 STRING
468 if (symbol_prefix == NULL)
469 $$ = $1;
470 else
472 $$ = xmalloc (strlen (symbol_prefix) + strlen ($1) + 2);
473 sprintf ($$, "%s@%s", symbol_prefix, $1);
474 free ($1);
479 /* A list of strings. */
481 string_list:
482 /* May be empty. */
484 $$ = NULL;
486 | STRING string_list
488 $$ = string_list_cons ($1, $2);
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));
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. */
503 /* The states the lexer can be in. */
505 enum lex_state
507 /* At the beginning of a line. */
508 BEGINNING_OF_LINE,
509 /* In the middle of a line. */
510 IN_LINE
513 /* We need to keep a stack of files to handle file inclusion. */
515 struct input
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;
529 /* The current input file. */
531 static struct input current;
533 /* The character which introduces comments. */
534 #define COMMENT_CHAR '#'
536 /* Start the lexer going on the main input file. */
538 bfd_boolean
539 nlmlex_file (const char *name)
541 current.next = NULL;
542 return nlmlex_file_open (name);
545 /* Start the lexer going on a subsidiary input file. */
547 static void
548 nlmlex_file_push (const char *name)
550 struct input *push;
552 push = (struct input *) xmalloc (sizeof (struct input));
553 *push = current;
554 if (nlmlex_file_open (name))
555 current.next = push;
556 else
558 current = *push;
559 free (push);
563 /* Start lexing from a file. */
565 static bfd_boolean
566 nlmlex_file_open (const char *name)
568 current.file = fopen (name, "r");
569 if (current.file == NULL)
571 fprintf (stderr, "%s:%s: %s\n", program_name, name, strerror (errno));
572 ++parse_errors;
573 return FALSE;
575 current.name = xstrdup (name);
576 current.lineno = 1;
577 current.state = BEGINNING_OF_LINE;
578 return TRUE;
581 /* Table used to turn keywords into tokens. */
583 struct keyword_tokens_struct
585 const char *keyword;
586 int token;
589 static struct keyword_tokens_struct keyword_tokens[] =
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 }
627 #define KEYWORD_COUNT (sizeof (keyword_tokens) / sizeof (keyword_tokens[0]))
629 /* The lexer accumulates strings in these variables. */
630 static char *lex_buf;
631 static int lex_size;
632 static int lex_pos;
634 /* Start accumulating strings into the buffer. */
635 #define BUF_INIT() \
636 ((void) (lex_buf != NULL ? lex_pos = 0 : nlmlex_buf_init ()))
638 static int
639 nlmlex_buf_init (void)
641 lex_size = 10;
642 lex_buf = xmalloc (lex_size + 1);
643 lex_pos = 0;
644 return 0;
647 /* Finish a string in the buffer. */
648 #define BUF_FINISH() ((void) (lex_buf[lex_pos] = '\0'))
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)))
656 static char
657 nlmlex_buf_add (int c)
659 if (lex_pos >= lex_size)
661 lex_size *= 2;
662 lex_buf = xrealloc (lex_buf, lex_size + 1);
665 return lex_buf[lex_pos++] = c;
668 /* The lexer proper. This is called by the bison generated parsing
669 code. */
671 static int
672 yylex (void)
674 int c;
676 tail_recurse:
678 c = getc (current.file);
680 /* Commas are treated as whitespace characters. */
681 while (ISSPACE (c) || c == ',')
683 current.state = IN_LINE;
684 if (c == '\n')
686 ++current.lineno;
687 current.state = BEGINNING_OF_LINE;
689 c = getc (current.file);
692 /* At the end of the file we either pop to the previous file or
693 finish up. */
694 if (c == EOF)
696 fclose (current.file);
697 free (current.name);
698 if (current.next == NULL)
699 return 0;
700 else
702 struct input *next;
704 next = current.next;
705 current = *next;
706 free (next);
707 goto tail_recurse;
711 /* A comment character always means to drop everything until the
712 next newline. */
713 if (c == COMMENT_CHAR)
717 c = getc (current.file);
719 while (c != '\n');
720 ++current.lineno;
721 current.state = BEGINNING_OF_LINE;
722 goto tail_recurse;
725 /* An '@' introduces an include file. */
726 if (c == '@')
730 c = getc (current.file);
731 if (c == '\n')
732 ++current.lineno;
734 while (ISSPACE (c));
735 BUF_INIT ();
736 while (! ISSPACE (c) && c != EOF)
738 BUF_ADD (c);
739 c = getc (current.file);
741 BUF_FINISH ();
743 ungetc (c, current.file);
745 nlmlex_file_push (lex_buf);
746 goto tail_recurse;
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)
753 BUF_INIT ();
754 while (ISALNUM (c) || c == '_')
756 BUF_ADD (TOUPPER (c));
757 c = getc (current.file);
759 BUF_FINISH ();
761 if (c != EOF && ! ISSPACE (c) && c != ',')
763 nlmheader_identify ();
764 fprintf (stderr, _("%s:%d: illegal character in keyword: %c\n"),
765 current.name, current.lineno, c);
767 else
769 unsigned int i;
771 for (i = 0; i < KEYWORD_COUNT; i++)
773 if (lex_buf[0] == keyword_tokens[i].keyword[0]
774 && strcmp (lex_buf, keyword_tokens[i].keyword) == 0)
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;
784 nlmheader_identify ();
785 fprintf (stderr, _("%s:%d: unrecognized keyword: %s\n"),
786 current.name, current.lineno, lex_buf);
789 ++parse_errors;
790 /* Treat the rest of this line as a comment. */
791 ungetc (COMMENT_CHAR, current.file);
792 goto tail_recurse;
795 /* Parentheses just represent themselves. */
796 if (c == '(' || c == ')')
797 return c;
799 /* Handle quoted strings. */
800 if (c == '"' || c == '\'')
802 int quote;
803 int start_lineno;
805 quote = c;
806 start_lineno = current.lineno;
808 c = getc (current.file);
809 BUF_INIT ();
810 while (c != quote && c != EOF)
812 BUF_ADD (c);
813 if (c == '\n')
814 ++current.lineno;
815 c = getc (current.file);
817 BUF_FINISH ();
819 if (c == EOF)
821 nlmheader_identify ();
822 fprintf (stderr, _("%s:%d: end of file in quoted string\n"),
823 current.name, start_lineno);
824 ++parse_errors;
827 /* FIXME: Possible memory leak. */
828 yylval.string = xstrdup (lex_buf);
829 return QUOTED_STRING;
832 /* Gather a generic argument. */
833 BUF_INIT ();
834 while (! ISSPACE (c)
835 && c != ','
836 && c != COMMENT_CHAR
837 && c != '('
838 && c != ')')
840 BUF_ADD (c);
841 c = getc (current.file);
843 BUF_FINISH ();
845 ungetc (c, current.file);
847 /* FIXME: Possible memory leak. */
848 yylval.string = xstrdup (lex_buf);
849 return STRING;
852 /* Get a number from a string. */
854 static long
855 nlmlex_get_number (const char *s)
857 long ret;
858 char *send;
860 ret = strtol (s, &send, 10);
861 if (*send != '\0')
862 nlmheader_warn (_("bad number"), -1);
863 return ret;
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. */
871 static void
872 nlmheader_identify (void)
874 static int done;
876 if (! done)
878 fprintf (stderr, _("%s: problems in NLM command language input:\n"),
879 program_name);
880 done = 1;
884 /* Issue a warning. */
886 static void
887 nlmheader_warn (const char *s, int imax)
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");
896 /* Report an error. */
898 static void
899 nlmheader_error (const char *s)
901 nlmheader_warn (s, -1);
902 ++parse_errors;
905 /* Add a string to a string list. */
907 static struct string_list *
908 string_list_cons (char *s, struct string_list *l)
910 struct string_list *ret;
912 ret = (struct string_list *) xmalloc (sizeof (struct string_list));
913 ret->next = l;
914 ret->string = s;
915 return ret;
918 /* Append a string list to another string list. */
920 static struct string_list *
921 string_list_append (struct string_list *l1, struct string_list *l2)
923 register struct string_list **pp;
925 for (pp = &l1; *pp != NULL; pp = &(*pp)->next)
927 *pp = l2;
928 return l1;
931 /* Append a string to a string list. */
933 static struct string_list *
934 string_list_append1 (struct string_list *l, char *s)
936 struct string_list *n;
937 register struct string_list **pp;
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)
944 *pp = n;
945 return l;
948 /* Duplicate a string in memory. */
950 static char *
951 xstrdup (const char *s)
953 unsigned long len;
954 char *ret;
956 len = strlen (s);
957 ret = xmalloc (len + 1);
958 strcpy (ret, s);
959 return ret;