daily update
[binutils.git] / ld / deffilep.y
blob4f17f506654288858d644f12f694356bfe038e6c
1 %{ /* deffilep.y - parser for .def files */
3 /* Copyright 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007
4 Free Software Foundation, Inc.
6 This file is part of GNU Binutils.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 #include "sysdep.h"
24 #include "libiberty.h"
25 #include "safe-ctype.h"
26 #include "bfd.h"
27 #include "ld.h"
28 #include "ldmisc.h"
29 #include "deffile.h"
31 #define TRACE 0
33 #define ROUND_UP(a, b) (((a)+((b)-1))&~((b)-1))
35 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
36 as well as gratuitiously global symbol names, so we can have multiple
37 yacc generated parsers in ld. Note that these are only the variables
38 produced by yacc. If other parser generators (bison, byacc, etc) produce
39 additional global names that conflict at link time, then those parser
40 generators need to be fixed instead of adding those names to this list. */
42 #define yymaxdepth def_maxdepth
43 #define yyparse def_parse
44 #define yylex def_lex
45 #define yyerror def_error
46 #define yylval def_lval
47 #define yychar def_char
48 #define yydebug def_debug
49 #define yypact def_pact
50 #define yyr1 def_r1
51 #define yyr2 def_r2
52 #define yydef def_def
53 #define yychk def_chk
54 #define yypgo def_pgo
55 #define yyact def_act
56 #define yyexca def_exca
57 #define yyerrflag def_errflag
58 #define yynerrs def_nerrs
59 #define yyps def_ps
60 #define yypv def_pv
61 #define yys def_s
62 #define yy_yys def_yys
63 #define yystate def_state
64 #define yytmp def_tmp
65 #define yyv def_v
66 #define yy_yyv def_yyv
67 #define yyval def_val
68 #define yylloc def_lloc
69 #define yyreds def_reds /* With YYDEBUG defined. */
70 #define yytoks def_toks /* With YYDEBUG defined. */
71 #define yylhs def_yylhs
72 #define yylen def_yylen
73 #define yydefred def_yydefred
74 #define yydgoto def_yydgoto
75 #define yysindex def_yysindex
76 #define yyrindex def_yyrindex
77 #define yygindex def_yygindex
78 #define yytable def_yytable
79 #define yycheck def_yycheck
81 static void def_description (const char *);
82 static void def_exports (const char *, const char *, int, int);
83 static void def_heapsize (int, int);
84 static void def_import (const char *, const char *, const char *, const char *,
85 int);
86 static void def_image_name (const char *, int, int);
87 static void def_section (const char *, int);
88 static void def_section_alt (const char *, const char *);
89 static void def_stacksize (int, int);
90 static void def_version (int, int);
91 static void def_directive (char *);
92 static int def_parse (void);
93 static int def_error (const char *);
94 static int def_lex (void);
96 static int lex_forced_token = 0;
97 static const char *lex_parse_string = 0;
98 static const char *lex_parse_string_end = 0;
102 %union {
103 char *id;
104 int number;
107 %token NAME LIBRARY DESCRIPTION STACKSIZE HEAPSIZE CODE DATAU DATAL
108 %token SECTIONS EXPORTS IMPORTS VERSIONK BASE CONSTANTU CONSTANTL
109 %token PRIVATEU PRIVATEL
110 %token READ WRITE EXECUTE SHARED NONAMEU NONAMEL DIRECTIVE
111 %token <id> ID
112 %token <number> NUMBER
113 %type <number> opt_base opt_ordinal
114 %type <number> attr attr_list opt_number exp_opt_list exp_opt
115 %type <id> opt_name opt_equal_name dot_name
119 start: start command
120 | command
123 command:
124 NAME opt_name opt_base { def_image_name ($2, $3, 0); }
125 | LIBRARY opt_name opt_base { def_image_name ($2, $3, 1); }
126 | DESCRIPTION ID { def_description ($2);}
127 | STACKSIZE NUMBER opt_number { def_stacksize ($2, $3);}
128 | HEAPSIZE NUMBER opt_number { def_heapsize ($2, $3);}
129 | CODE attr_list { def_section ("CODE", $2);}
130 | DATAU attr_list { def_section ("DATA", $2);}
131 | SECTIONS seclist
132 | EXPORTS explist
133 | IMPORTS implist
134 | VERSIONK NUMBER { def_version ($2, 0);}
135 | VERSIONK NUMBER '.' NUMBER { def_version ($2, $4);}
136 | DIRECTIVE ID { def_directive ($2);}
140 explist:
141 /* EMPTY */
142 | expline
143 | explist expline
146 expline:
147 /* The opt_comma is necessary to support both the usual
148 DEF file syntax as well as .drectve syntax which
149 mandates <expsym>,<expoptlist>. */
150 dot_name opt_equal_name opt_ordinal opt_comma exp_opt_list
151 { def_exports ($1, $2, $3, $5); }
153 exp_opt_list:
154 /* The opt_comma is necessary to support both the usual
155 DEF file syntax as well as .drectve syntax which
156 allows for comma separated opt list. */
157 exp_opt opt_comma exp_opt_list { $$ = $1 | $3; }
158 | { $$ = 0; }
160 exp_opt:
161 NONAMEU { $$ = 1; }
162 | NONAMEL { $$ = 1; }
163 | CONSTANTU { $$ = 2; }
164 | CONSTANTL { $$ = 2; }
165 | DATAU { $$ = 4; }
166 | DATAL { $$ = 4; }
167 | PRIVATEU { $$ = 8; }
168 | PRIVATEL { $$ = 8; }
170 implist:
171 implist impline
172 | impline
175 impline:
176 ID '=' ID '.' ID '.' ID { def_import ($1, $3, $5, $7, -1); }
177 | ID '=' ID '.' ID '.' NUMBER { def_import ($1, $3, $5, 0, $7); }
178 | ID '=' ID '.' ID { def_import ($1, $3, 0, $5, -1); }
179 | ID '=' ID '.' NUMBER { def_import ($1, $3, 0, 0, $5); }
180 | ID '.' ID '.' ID { def_import ( 0, $1, $3, $5, -1); }
181 | ID '.' ID { def_import ( 0, $1, 0, $3, -1); }
184 seclist:
185 seclist secline
186 | secline
189 secline:
190 ID attr_list { def_section ($1, $2);}
191 | ID ID { def_section_alt ($1, $2);}
194 attr_list:
195 attr_list opt_comma attr { $$ = $1 | $3; }
196 | attr { $$ = $1; }
199 opt_comma:
203 opt_number: ',' NUMBER { $$=$2;}
204 | { $$=-1;}
207 attr:
208 READ { $$ = 1;}
209 | WRITE { $$ = 2;}
210 | EXECUTE { $$=4;}
211 | SHARED { $$=8;}
214 opt_name: ID { $$ = $1; }
215 | ID '.' ID
217 char *name = xmalloc (strlen ($1) + 1 + strlen ($3) + 1);
218 sprintf (name, "%s.%s", $1, $3);
219 $$ = name;
221 | { $$ = ""; }
224 opt_ordinal:
225 '@' NUMBER { $$ = $2;}
226 | { $$ = -1;}
229 opt_equal_name:
230 '=' dot_name { $$ = $2; }
231 | { $$ = 0; }
234 opt_base: BASE '=' NUMBER { $$ = $3;}
235 | { $$ = -1;}
238 dot_name: ID { $$ = $1; }
239 | dot_name '.' ID
241 char *name = xmalloc (strlen ($1) + 1 + strlen ($3) + 1);
242 sprintf (name, "%s.%s", $1, $3);
243 $$ = name;
250 /*****************************************************************************
252 *****************************************************************************/
254 static FILE *the_file;
255 static const char *def_filename;
256 static int linenumber;
257 static def_file *def;
258 static int saw_newline;
260 struct directive
262 struct directive *next;
263 char *name;
264 int len;
267 static struct directive *directives = 0;
269 def_file *
270 def_file_empty (void)
272 def_file *rv = xmalloc (sizeof (def_file));
273 memset (rv, 0, sizeof (def_file));
274 rv->is_dll = -1;
275 rv->base_address = (bfd_vma) -1;
276 rv->stack_reserve = rv->stack_commit = -1;
277 rv->heap_reserve = rv->heap_commit = -1;
278 rv->version_major = rv->version_minor = -1;
279 return rv;
282 def_file *
283 def_file_parse (const char *filename, def_file *add_to)
285 struct directive *d;
287 the_file = fopen (filename, "r");
288 def_filename = filename;
289 linenumber = 1;
290 if (!the_file)
292 perror (filename);
293 return 0;
295 if (add_to)
297 def = add_to;
299 else
301 def = def_file_empty ();
304 saw_newline = 1;
305 if (def_parse ())
307 def_file_free (def);
308 fclose (the_file);
309 return 0;
312 fclose (the_file);
314 for (d = directives; d; d = d->next)
316 #if TRACE
317 printf ("Adding directive %08x `%s'\n", d->name, d->name);
318 #endif
319 def_file_add_directive (def, d->name, d->len);
322 return def;
325 void
326 def_file_free (def_file *def)
328 int i;
330 if (!def)
331 return;
332 if (def->name)
333 free (def->name);
334 if (def->description)
335 free (def->description);
337 if (def->section_defs)
339 for (i = 0; i < def->num_section_defs; i++)
341 if (def->section_defs[i].name)
342 free (def->section_defs[i].name);
343 if (def->section_defs[i].class)
344 free (def->section_defs[i].class);
346 free (def->section_defs);
349 if (def->exports)
351 for (i = 0; i < def->num_exports; i++)
353 if (def->exports[i].internal_name
354 && def->exports[i].internal_name != def->exports[i].name)
355 free (def->exports[i].internal_name);
356 if (def->exports[i].name)
357 free (def->exports[i].name);
359 free (def->exports);
362 if (def->imports)
364 for (i = 0; i < def->num_imports; i++)
366 if (def->imports[i].internal_name
367 && def->imports[i].internal_name != def->imports[i].name)
368 free (def->imports[i].internal_name);
369 if (def->imports[i].name)
370 free (def->imports[i].name);
372 free (def->imports);
375 while (def->modules)
377 def_file_module *m = def->modules;
378 def->modules = def->modules->next;
379 free (m);
382 free (def);
385 #ifdef DEF_FILE_PRINT
386 void
387 def_file_print (FILE *file, def_file *def)
389 int i;
391 fprintf (file, ">>>> def_file at 0x%08x\n", def);
392 if (def->name)
393 fprintf (file, " name: %s\n", def->name ? def->name : "(unspecified)");
394 if (def->is_dll != -1)
395 fprintf (file, " is dll: %s\n", def->is_dll ? "yes" : "no");
396 if (def->base_address != (bfd_vma) -1)
397 fprintf (file, " base address: 0x%08x\n", def->base_address);
398 if (def->description)
399 fprintf (file, " description: `%s'\n", def->description);
400 if (def->stack_reserve != -1)
401 fprintf (file, " stack reserve: 0x%08x\n", def->stack_reserve);
402 if (def->stack_commit != -1)
403 fprintf (file, " stack commit: 0x%08x\n", def->stack_commit);
404 if (def->heap_reserve != -1)
405 fprintf (file, " heap reserve: 0x%08x\n", def->heap_reserve);
406 if (def->heap_commit != -1)
407 fprintf (file, " heap commit: 0x%08x\n", def->heap_commit);
409 if (def->num_section_defs > 0)
411 fprintf (file, " section defs:\n");
413 for (i = 0; i < def->num_section_defs; i++)
415 fprintf (file, " name: `%s', class: `%s', flags:",
416 def->section_defs[i].name, def->section_defs[i].class);
417 if (def->section_defs[i].flag_read)
418 fprintf (file, " R");
419 if (def->section_defs[i].flag_write)
420 fprintf (file, " W");
421 if (def->section_defs[i].flag_execute)
422 fprintf (file, " X");
423 if (def->section_defs[i].flag_shared)
424 fprintf (file, " S");
425 fprintf (file, "\n");
429 if (def->num_exports > 0)
431 fprintf (file, " exports:\n");
433 for (i = 0; i < def->num_exports; i++)
435 fprintf (file, " name: `%s', int: `%s', ordinal: %d, flags:",
436 def->exports[i].name, def->exports[i].internal_name,
437 def->exports[i].ordinal);
438 if (def->exports[i].flag_private)
439 fprintf (file, " P");
440 if (def->exports[i].flag_constant)
441 fprintf (file, " C");
442 if (def->exports[i].flag_noname)
443 fprintf (file, " N");
444 if (def->exports[i].flag_data)
445 fprintf (file, " D");
446 fprintf (file, "\n");
450 if (def->num_imports > 0)
452 fprintf (file, " imports:\n");
454 for (i = 0; i < def->num_imports; i++)
456 fprintf (file, " int: %s, from: `%s', name: `%s', ordinal: %d\n",
457 def->imports[i].internal_name,
458 def->imports[i].module,
459 def->imports[i].name,
460 def->imports[i].ordinal);
464 if (def->version_major != -1)
465 fprintf (file, " version: %d.%d\n", def->version_major, def->version_minor);
467 fprintf (file, "<<<< def_file at 0x%08x\n", def);
469 #endif
471 def_file_export *
472 def_file_add_export (def_file *def,
473 const char *external_name,
474 const char *internal_name,
475 int ordinal)
477 def_file_export *e;
478 int max_exports = ROUND_UP(def->num_exports, 32);
480 if (def->num_exports >= max_exports)
482 max_exports = ROUND_UP(def->num_exports + 1, 32);
483 if (def->exports)
484 def->exports = xrealloc (def->exports,
485 max_exports * sizeof (def_file_export));
486 else
487 def->exports = xmalloc (max_exports * sizeof (def_file_export));
489 e = def->exports + def->num_exports;
490 memset (e, 0, sizeof (def_file_export));
491 if (internal_name && !external_name)
492 external_name = internal_name;
493 if (external_name && !internal_name)
494 internal_name = external_name;
495 e->name = xstrdup (external_name);
496 e->internal_name = xstrdup (internal_name);
497 e->ordinal = ordinal;
498 def->num_exports++;
499 return e;
502 def_file_module *
503 def_get_module (def_file *def, const char *name)
505 def_file_module *s;
507 for (s = def->modules; s; s = s->next)
508 if (strcmp (s->name, name) == 0)
509 return s;
511 return NULL;
514 static def_file_module *
515 def_stash_module (def_file *def, const char *name)
517 def_file_module *s;
519 if ((s = def_get_module (def, name)) != NULL)
520 return s;
521 s = xmalloc (sizeof (def_file_module) + strlen (name));
522 s->next = def->modules;
523 def->modules = s;
524 s->user_data = 0;
525 strcpy (s->name, name);
526 return s;
529 def_file_import *
530 def_file_add_import (def_file *def,
531 const char *name,
532 const char *module,
533 int ordinal,
534 const char *internal_name)
536 def_file_import *i;
537 int max_imports = ROUND_UP (def->num_imports, 16);
539 if (def->num_imports >= max_imports)
541 max_imports = ROUND_UP (def->num_imports+1, 16);
543 if (def->imports)
544 def->imports = xrealloc (def->imports,
545 max_imports * sizeof (def_file_import));
546 else
547 def->imports = xmalloc (max_imports * sizeof (def_file_import));
549 i = def->imports + def->num_imports;
550 memset (i, 0, sizeof (def_file_import));
551 if (name)
552 i->name = xstrdup (name);
553 if (module)
554 i->module = def_stash_module (def, module);
555 i->ordinal = ordinal;
556 if (internal_name)
557 i->internal_name = xstrdup (internal_name);
558 else
559 i->internal_name = i->name;
560 def->num_imports++;
562 return i;
565 struct
567 char *param;
568 int token;
570 diropts[] =
572 { "-heap", HEAPSIZE },
573 { "-stack", STACKSIZE },
574 { "-attr", SECTIONS },
575 { "-export", EXPORTS },
576 { 0, 0 }
579 void
580 def_file_add_directive (def_file *my_def, const char *param, int len)
582 def_file *save_def = def;
583 const char *pend = param + len;
584 char * tend = (char *) param;
585 int i;
587 def = my_def;
589 while (param < pend)
591 while (param < pend
592 && (ISSPACE (*param) || *param == '\n' || *param == 0))
593 param++;
595 if (param == pend)
596 break;
598 /* Scan forward until we encounter any of:
599 - the end of the buffer
600 - the start of a new option
601 - a newline seperating options
602 - a NUL seperating options. */
603 for (tend = (char *) (param + 1);
604 (tend < pend
605 && !(ISSPACE (tend[-1]) && *tend == '-')
606 && *tend != '\n' && *tend != 0);
607 tend++)
610 for (i = 0; diropts[i].param; i++)
612 int len = strlen (diropts[i].param);
614 if (tend - param >= len
615 && strncmp (param, diropts[i].param, len) == 0
616 && (param[len] == ':' || param[len] == ' '))
618 lex_parse_string_end = tend;
619 lex_parse_string = param + len + 1;
620 lex_forced_token = diropts[i].token;
621 saw_newline = 0;
622 if (def_parse ())
623 continue;
624 break;
628 if (!diropts[i].param)
630 char saved;
632 saved = * tend;
633 * tend = 0;
634 /* xgettext:c-format */
635 einfo (_("Warning: .drectve `%s' unrecognized\n"), param);
636 * tend = saved;
639 lex_parse_string = 0;
640 param = tend;
643 def = save_def;
646 /* Parser Callbacks. */
648 static void
649 def_image_name (const char *name, int base, int is_dll)
651 /* If a LIBRARY or NAME statement is specified without a name, there is nothing
652 to do here. We retain the output filename specified on command line. */
653 if (*name)
655 const char* image_name = lbasename (name);
656 if (image_name != name)
657 einfo ("%s:%d: Warning: path components stripped from %s, '%s'\n",
658 def_filename, linenumber, is_dll ? "LIBRARY" : "NAME",
659 name);
660 if (def->name)
661 free (def->name);
662 /* Append the default suffix, if none specified. */
663 if (strchr (image_name, '.') == 0)
665 const char * suffix = is_dll ? ".dll" : ".exe";
667 def->name = xmalloc (strlen (image_name) + strlen (suffix) + 1);
668 sprintf (def->name, "%s%s", image_name, suffix);
670 else
671 def->name = xstrdup (image_name);
674 /* Honor a BASE address statement, even if LIBRARY string is empty. */
675 def->base_address = base;
676 def->is_dll = is_dll;
679 static void
680 def_description (const char *text)
682 int len = def->description ? strlen (def->description) : 0;
684 len += strlen (text) + 1;
685 if (def->description)
687 def->description = xrealloc (def->description, len);
688 strcat (def->description, text);
690 else
692 def->description = xmalloc (len);
693 strcpy (def->description, text);
697 static void
698 def_stacksize (int reserve, int commit)
700 def->stack_reserve = reserve;
701 def->stack_commit = commit;
704 static void
705 def_heapsize (int reserve, int commit)
707 def->heap_reserve = reserve;
708 def->heap_commit = commit;
711 static void
712 def_section (const char *name, int attr)
714 def_file_section *s;
715 int max_sections = ROUND_UP (def->num_section_defs, 4);
717 if (def->num_section_defs >= max_sections)
719 max_sections = ROUND_UP (def->num_section_defs+1, 4);
721 if (def->section_defs)
722 def->section_defs = xrealloc (def->section_defs,
723 max_sections * sizeof (def_file_import));
724 else
725 def->section_defs = xmalloc (max_sections * sizeof (def_file_import));
727 s = def->section_defs + def->num_section_defs;
728 memset (s, 0, sizeof (def_file_section));
729 s->name = xstrdup (name);
730 if (attr & 1)
731 s->flag_read = 1;
732 if (attr & 2)
733 s->flag_write = 1;
734 if (attr & 4)
735 s->flag_execute = 1;
736 if (attr & 8)
737 s->flag_shared = 1;
739 def->num_section_defs++;
742 static void
743 def_section_alt (const char *name, const char *attr)
745 int aval = 0;
747 for (; *attr; attr++)
749 switch (*attr)
751 case 'R':
752 case 'r':
753 aval |= 1;
754 break;
755 case 'W':
756 case 'w':
757 aval |= 2;
758 break;
759 case 'X':
760 case 'x':
761 aval |= 4;
762 break;
763 case 'S':
764 case 's':
765 aval |= 8;
766 break;
769 def_section (name, aval);
772 static void
773 def_exports (const char *external_name,
774 const char *internal_name,
775 int ordinal,
776 int flags)
778 def_file_export *dfe;
780 if (!internal_name && external_name)
781 internal_name = external_name;
782 #if TRACE
783 printf ("def_exports, ext=%s int=%s\n", external_name, internal_name);
784 #endif
786 dfe = def_file_add_export (def, external_name, internal_name, ordinal);
787 if (flags & 1)
788 dfe->flag_noname = 1;
789 if (flags & 2)
790 dfe->flag_constant = 1;
791 if (flags & 4)
792 dfe->flag_data = 1;
793 if (flags & 8)
794 dfe->flag_private = 1;
797 static void
798 def_import (const char *internal_name,
799 const char *module,
800 const char *dllext,
801 const char *name,
802 int ordinal)
804 char *buf = 0;
805 const char *ext = dllext ? dllext : "dll";
807 buf = xmalloc (strlen (module) + strlen (ext) + 2);
808 sprintf (buf, "%s.%s", module, ext);
809 module = buf;
811 def_file_add_import (def, name, module, ordinal, internal_name);
812 if (buf)
813 free (buf);
816 static void
817 def_version (int major, int minor)
819 def->version_major = major;
820 def->version_minor = minor;
823 static void
824 def_directive (char *str)
826 struct directive *d = xmalloc (sizeof (struct directive));
828 d->next = directives;
829 directives = d;
830 d->name = xstrdup (str);
831 d->len = strlen (str);
834 static int
835 def_error (const char *err)
837 einfo ("%P: %s:%d: %s\n",
838 def_filename ? def_filename : "<unknown-file>", linenumber, err);
839 return 0;
843 /* Lexical Scanner. */
845 #undef TRACE
846 #define TRACE 0
848 /* Never freed, but always reused as needed, so no real leak. */
849 static char *buffer = 0;
850 static int buflen = 0;
851 static int bufptr = 0;
853 static void
854 put_buf (char c)
856 if (bufptr == buflen)
858 buflen += 50; /* overly reasonable, eh? */
859 if (buffer)
860 buffer = xrealloc (buffer, buflen + 1);
861 else
862 buffer = xmalloc (buflen + 1);
864 buffer[bufptr++] = c;
865 buffer[bufptr] = 0; /* not optimal, but very convenient. */
868 static struct
870 char *name;
871 int token;
873 tokens[] =
875 { "BASE", BASE },
876 { "CODE", CODE },
877 { "CONSTANT", CONSTANTU },
878 { "constant", CONSTANTL },
879 { "DATA", DATAU },
880 { "data", DATAL },
881 { "DESCRIPTION", DESCRIPTION },
882 { "DIRECTIVE", DIRECTIVE },
883 { "EXECUTE", EXECUTE },
884 { "EXPORTS", EXPORTS },
885 { "HEAPSIZE", HEAPSIZE },
886 { "IMPORTS", IMPORTS },
887 { "LIBRARY", LIBRARY },
888 { "NAME", NAME },
889 { "NONAME", NONAMEU },
890 { "noname", NONAMEL },
891 { "PRIVATE", PRIVATEU },
892 { "private", PRIVATEL },
893 { "READ", READ },
894 { "SECTIONS", SECTIONS },
895 { "SEGMENTS", SECTIONS },
896 { "SHARED", SHARED },
897 { "STACKSIZE", STACKSIZE },
898 { "VERSION", VERSIONK },
899 { "WRITE", WRITE },
900 { 0, 0 }
903 static int
904 def_getc (void)
906 int rv;
908 if (lex_parse_string)
910 if (lex_parse_string >= lex_parse_string_end)
911 rv = EOF;
912 else
913 rv = *lex_parse_string++;
915 else
917 rv = fgetc (the_file);
919 if (rv == '\n')
920 saw_newline = 1;
921 return rv;
924 static int
925 def_ungetc (int c)
927 if (lex_parse_string)
929 lex_parse_string--;
930 return c;
932 else
933 return ungetc (c, the_file);
936 static int
937 def_lex (void)
939 int c, i, q;
941 if (lex_forced_token)
943 i = lex_forced_token;
944 lex_forced_token = 0;
945 #if TRACE
946 printf ("lex: forcing token %d\n", i);
947 #endif
948 return i;
951 c = def_getc ();
953 /* Trim leading whitespace. */
954 while (c != EOF && (c == ' ' || c == '\t') && saw_newline)
955 c = def_getc ();
957 if (c == EOF)
959 #if TRACE
960 printf ("lex: EOF\n");
961 #endif
962 return 0;
965 if (saw_newline && c == ';')
969 c = def_getc ();
971 while (c != EOF && c != '\n');
972 if (c == '\n')
973 return def_lex ();
974 return 0;
977 /* Must be something else. */
978 saw_newline = 0;
980 if (ISDIGIT (c))
982 bufptr = 0;
983 while (c != EOF && (ISXDIGIT (c) || (c == 'x')))
985 put_buf (c);
986 c = def_getc ();
988 if (c != EOF)
989 def_ungetc (c);
990 yylval.number = strtoul (buffer, 0, 0);
991 #if TRACE
992 printf ("lex: `%s' returns NUMBER %d\n", buffer, yylval.number);
993 #endif
994 return NUMBER;
997 if (ISALPHA (c) || strchr ("$:-_?@", c))
999 bufptr = 0;
1000 q = c;
1001 put_buf (c);
1002 c = def_getc ();
1004 if (q == '@')
1006 if (ISBLANK (c) ) /* '@' followed by whitespace. */
1007 return (q);
1008 else if (ISDIGIT (c)) /* '@' followed by digit. */
1010 def_ungetc (c);
1011 return (q);
1013 #if TRACE
1014 printf ("lex: @ returns itself\n");
1015 #endif
1018 while (c != EOF && (ISALNUM (c) || strchr ("$:-_?/@", c)))
1020 put_buf (c);
1021 c = def_getc ();
1023 if (c != EOF)
1024 def_ungetc (c);
1025 if (ISALPHA (q)) /* Check for tokens. */
1027 for (i = 0; tokens[i].name; i++)
1028 if (strcmp (tokens[i].name, buffer) == 0)
1030 #if TRACE
1031 printf ("lex: `%s' is a string token\n", buffer);
1032 #endif
1033 return tokens[i].token;
1036 #if TRACE
1037 printf ("lex: `%s' returns ID\n", buffer);
1038 #endif
1039 yylval.id = xstrdup (buffer);
1040 return ID;
1043 if (c == '\'' || c == '"')
1045 q = c;
1046 c = def_getc ();
1047 bufptr = 0;
1049 while (c != EOF && c != q)
1051 put_buf (c);
1052 c = def_getc ();
1054 yylval.id = xstrdup (buffer);
1055 #if TRACE
1056 printf ("lex: `%s' returns ID\n", buffer);
1057 #endif
1058 return ID;
1061 if (c == '=' || c == '.' || c == ',')
1063 #if TRACE
1064 printf ("lex: `%c' returns itself\n", c);
1065 #endif
1066 return c;
1069 if (c == '\n')
1071 linenumber++;
1072 saw_newline = 1;
1075 /*printf ("lex: 0x%02x ignored\n", c); */
1076 return def_lex ();