?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Remove traces of ACPI_QUIRK_VMWARE, should be no longer needed.
[dragonfly.git] / usr.bin / lex / gen.c
blob74419589ecc80b5d5cf5faf7837192f44602556d
1 /* gen - actual generation (writing) of flex scanners */
2
3 /*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Vern Paxson.
9 *
10 * The United States Government has rights in this work pursuant
11 * to contract no. DE-AC03-76SF00098 between the United States
12 * Department of Energy and the University of California.
13 *
14 * Redistribution and use in source and binary forms are permitted provided
15 * that: (1) source distributions retain this entire copyright notice and
16 * comment, and (2) distributions including binaries display the following
17 * acknowledgement: ``This product includes software developed by the
18 * University of California, Berkeley and its contributors'' in the
19 * documentation or other materials provided with the distribution and in
20 * all advertising materials mentioning features or use of this software.
21 * Neither the name of the University nor the names of its contributors may
22 * be used to endorse or promote products derived from this software without
23 * specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
27 */
28
29 /* $Header: /home/daffy/u0/vern/flex/RCS/gen.c,v 2.56 96/05/25 20:43:38 vern Exp $ */
30 /* $FreeBSD: src/usr.bin/lex/gen.c,v 1.5 1999/10/27 07:56:44 obrien Exp $ */
31 /* $DragonFly: src/usr.bin/lex/gen.c,v 1.6 2008/10/16 01:52:32 swildner Exp $ */
32
33 #include "flexdef.h"
34
35
36 /* declare functions that have forward references */
37
38 void gen_next_state PROTO((int));
39 void genecs PROTO((void));
40 void indent_put2s PROTO((char [], char []));
41 void indent_puts PROTO((char []));
42
43
44 static int indent_level = 0; /* each level is 8 spaces */
45
46 #define indent_up() (++indent_level)
47 #define indent_down() (--indent_level)
48 #define set_indent(indent_val) indent_level = indent_val
49
50 /* Almost everything is done in terms of arrays starting at 1, so provide
51 * a null entry for the zero element of all C arrays. (The exception
52 * to this is that the fast table representation generally uses the
53 * 0 elements of its arrays, too.)
54 */
55 static char C_int_decl[] = "static yyconst int %s[%d] =\n { 0,\n";
56 static char C_short_decl[] = "static yyconst short int %s[%d] =\n { 0,\n";
57 static char C_long_decl[] = "static yyconst long int %s[%d] =\n { 0,\n";
58 static char C_state_decl[] =
59 "static yyconst yy_state_type %s[%d] =\n { 0,\n";
60
61
62 /* Indent to the current level. */
63
64 void do_indent(void)
65 {
66 int i = indent_level * 8;
67
68 while ( i >= 8 )
69 {
70 outc( '\t' );
71 i -= 8;
72 }
73
74 while ( i > 0 )
75 {
76 outc( ' ' );
77 --i;
78 }
79 }
80
81
82 /* Generate the code to keep backing-up information. */
83
84 void gen_backing_up(void)
85 {
86 if ( reject || num_backing_up == 0 )
87 return;
88
89 if ( fullspd )
90 indent_puts( "if ( yy_current_state[-1].yy_nxt )" );
91 else
92 indent_puts( "if ( yy_accept[yy_current_state] )" );
93
94 indent_up();
95 indent_puts( "{" );
96 indent_puts( "yy_last_accepting_state = yy_current_state;" );
97 indent_puts( "yy_last_accepting_cpos = yy_cp;" );
98 indent_puts( "}" );
99 indent_down();
100 }
101
102
103 /* Generate the code to perform the backing up. */
104
105 void gen_bu_action(void)
106 {
107 if ( reject || num_backing_up == 0 )
108 return;
109
110 set_indent( 3 );
111
112 indent_puts( "case 0: /* must back up */" );
113 indent_puts( "/* undo the effects of YY_DO_BEFORE_ACTION */" );
114 indent_puts( "*yy_cp = yy_hold_char;" );
115
116 if ( fullspd || fulltbl )
117 indent_puts( "yy_cp = yy_last_accepting_cpos + 1;" );
118 else
119 /* Backing-up info for compressed tables is taken \after/
120 * yy_cp has been incremented for the next state.
121 */
122 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
123
124 indent_puts( "yy_current_state = yy_last_accepting_state;" );
125 indent_puts( "goto yy_find_action;" );
126 outc( '\n' );
127
128 set_indent( 0 );
129 }
130
131
132 /* genctbl - generates full speed compressed transition table */
133
134 void genctbl(void)
135 {
136 int i;
137 int end_of_buffer_action = num_rules + 1;
138
139 /* Table of verify for transition and offset to next state. */
140 out_dec( "static yyconst struct yy_trans_info yy_transition[%d] =\n",
141 tblend + numecs + 1 );
142 outn( " {" );
143
144 /* We want the transition to be represented as the offset to the
145 * next state, not the actual state number, which is what it currently
146 * is. The offset is base[nxt[i]] - (base of current state)]. That's
147 * just the difference between the starting points of the two involved
148 * states (to - from).
149 *
150 * First, though, we need to find some way to put in our end-of-buffer
151 * flags and states. We do this by making a state with absolutely no
152 * transitions. We put it at the end of the table.
153 */
154
155 /* We need to have room in nxt/chk for two more slots: One for the
156 * action and one for the end-of-buffer transition. We now *assume*
157 * that we're guaranteed the only character we'll try to index this
158 * nxt/chk pair with is EOB, i.e., 0, so we don't have to make sure
159 * there's room for jam entries for other characters.
160 */
161
162 while ( tblend + 2 >= current_max_xpairs )
163 expand_nxt_chk();
164
165 while ( lastdfa + 1 >= current_max_dfas )
166 increase_max_dfas();
167
168 base[lastdfa + 1] = tblend + 2;
169 nxt[tblend + 1] = end_of_buffer_action;
170 chk[tblend + 1] = numecs + 1;
171 chk[tblend + 2] = 1; /* anything but EOB */
172
173 /* So that "make test" won't show arb. differences. */
174 nxt[tblend + 2] = 0;
175
176 /* Make sure every state has an end-of-buffer transition and an
177 * action #.
178 */
179 for ( i = 0; i <= lastdfa; ++i )
180 {
181 int anum = dfaacc[i].dfaacc_state;
182 int offset = base[i];
183
184 chk[offset] = EOB_POSITION;
185 chk[offset - 1] = ACTION_POSITION;
186 nxt[offset - 1] = anum; /* action number */
187 }
188
189 for ( i = 0; i <= tblend; ++i )
190 {
191 if ( chk[i] == EOB_POSITION )
192 transition_struct_out( 0, base[lastdfa + 1] - i );
193
194 else if ( chk[i] == ACTION_POSITION )
195 transition_struct_out( 0, nxt[i] );
196
197 else if ( chk[i] > numecs || chk[i] == 0 )
198 transition_struct_out( 0, 0 ); /* unused slot */
199
200 else /* verify, transition */
201 transition_struct_out( chk[i],
202 base[nxt[i]] - (i - chk[i]) );
203 }
204
205
206 /* Here's the final, end-of-buffer state. */
207 transition_struct_out( chk[tblend + 1], nxt[tblend + 1] );
208 transition_struct_out( chk[tblend + 2], nxt[tblend + 2] );
209
210 outn( " };\n" );
211
212 /* Table of pointers to start states. */
213 out_dec(
214 "static yyconst struct yy_trans_info *yy_start_state_list[%d] =\n",
215 lastsc * 2 + 1 );
216 outn( " {" ); /* } so vi doesn't get confused */
217
218 for ( i = 0; i <= lastsc * 2; ++i )
219 out_dec( " &yy_transition[%d],\n", base[i] );
220
221 dataend();
222
223 if ( useecs )
224 genecs();
225 }
226
227
228 /* Generate equivalence-class tables. */
229
230 void genecs(void)
231 {
232 int i, j;
233 int numrows;
234
235 out_str_dec( C_int_decl, "yy_ec", csize );
236
237 for ( i = 1; i < csize; ++i )
238 {
239 if ( caseins && (i >= 'A') && (i <= 'Z') )
240 ecgroup[i] = ecgroup[clower( i )];
241
242 ecgroup[i] = ABS( ecgroup[i] );
243 mkdata( ecgroup[i] );
244 }
245
246 dataend();
247
248 if ( trace )
249 {
250 fputs( _( "\n\nEquivalence Classes:\n\n" ), stderr );
251
252 numrows = csize / 8;
253
254 for ( j = 0; j < numrows; ++j )
255 {
256 for ( i = j; i < csize; i = i + numrows )
257 {
258 fprintf( stderr, "%4s = %-2d",
259 readable_form( i ), ecgroup[i] );
260
261 putc( ' ', stderr );
262 }
263
264 putc( '\n', stderr );
265 }
266 }
267 }
268
269
270 /* Generate the code to find the action number. */
271
272 void gen_find_action(void)
273 {
274 if ( fullspd )
275 indent_puts( "yy_act = yy_current_state[-1].yy_nxt;" );
276
277 else if ( fulltbl )
278 indent_puts( "yy_act = yy_accept[yy_current_state];" );
279
280 else if ( reject )
281 {
282 indent_puts( "yy_current_state = *--yy_state_ptr;" );
283 indent_puts( "yy_lp = yy_accept[yy_current_state];" );
284
285 outn(
286 "goto find_rule; /* avoid `defined but not used' warning */");
287 outn(
288 "find_rule: /* we branch to this label when backing up */" );
289
290 indent_puts(
291 "for ( ; ; ) /* until we find what rule we matched */" );
292
293 indent_up();
294
295 indent_puts( "{" );
296
297 indent_puts(
298 "if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )" );
299 indent_up();
300 indent_puts( "{" );
301 indent_puts( "yy_act = yy_acclist[yy_lp];" );
302
303 if ( variable_trailing_context_rules )
304 {
305 indent_puts( "if ( yy_act & YY_TRAILING_HEAD_MASK ||" );
306 indent_puts( " yy_looking_for_trail_begin )" );
307 indent_up();
308 indent_puts( "{" );
309
310 indent_puts(
311 "if ( yy_act == yy_looking_for_trail_begin )" );
312 indent_up();
313 indent_puts( "{" );
314 indent_puts( "yy_looking_for_trail_begin = 0;" );
315 indent_puts( "yy_act &= ~YY_TRAILING_HEAD_MASK;" );
316 indent_puts( "break;" );
317 indent_puts( "}" );
318 indent_down();
319
320 indent_puts( "}" );
321 indent_down();
322
323 indent_puts( "else if ( yy_act & YY_TRAILING_MASK )" );
324 indent_up();
325 indent_puts( "{" );
326 indent_puts(
327 "yy_looking_for_trail_begin = yy_act & ~YY_TRAILING_MASK;" );
328 indent_puts(
329 "yy_looking_for_trail_begin |= YY_TRAILING_HEAD_MASK;" );
330
331 if ( real_reject )
332 {
333 /* Remember matched text in case we back up
334 * due to REJECT.
335 */
336 indent_puts( "yy_full_match = yy_cp;" );
337 indent_puts( "yy_full_state = yy_state_ptr;" );
338 indent_puts( "yy_full_lp = yy_lp;" );
339 }
340
341 indent_puts( "}" );
342 indent_down();
343
344 indent_puts( "else" );
345 indent_up();
346 indent_puts( "{" );
347 indent_puts( "yy_full_match = yy_cp;" );
348 indent_puts( "yy_full_state = yy_state_ptr;" );
349 indent_puts( "yy_full_lp = yy_lp;" );
350 indent_puts( "break;" );
351 indent_puts( "}" );
352 indent_down();
353
354 indent_puts( "++yy_lp;" );
355 indent_puts( "goto find_rule;" );
356 }
357
358 else
359 {
360 /* Remember matched text in case we back up due to
361 * trailing context plus REJECT.
362 */
363 indent_up();
364 indent_puts( "{" );
365 indent_puts( "yy_full_match = yy_cp;" );
366 indent_puts( "break;" );
367 indent_puts( "}" );
368 indent_down();
369 }
370
371 indent_puts( "}" );
372 indent_down();
373
374 indent_puts( "--yy_cp;" );
375
376 /* We could consolidate the following two lines with those at
377 * the beginning, but at the cost of complaints that we're
378 * branching inside a loop.
379 */
380 indent_puts( "yy_current_state = *--yy_state_ptr;" );
381 indent_puts( "yy_lp = yy_accept[yy_current_state];" );
382
383 indent_puts( "}" );
384
385 indent_down();
386 }
387
388 else
389 { /* compressed */
390 indent_puts( "yy_act = yy_accept[yy_current_state];" );
391
392 if ( interactive && ! reject )
393 {
394 /* Do the guaranteed-needed backing up to figure out
395 * the match.
396 */
397 indent_puts( "if ( yy_act == 0 )" );
398 indent_up();
399 indent_puts( "{ /* have to back up */" );
400 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
401 indent_puts(
402 "yy_current_state = yy_last_accepting_state;" );
403 indent_puts( "yy_act = yy_accept[yy_current_state];" );
404 indent_puts( "}" );
405 indent_down();
406 }
407 }
408 }
409
410
411 /* genftbl - generate full transition table */
412
413 void genftbl(void)
414 {
415 int i;
416 int end_of_buffer_action = num_rules + 1;
417
418 out_str_dec( long_align ? C_long_decl : C_short_decl,
419 "yy_accept", lastdfa + 1 );
420
421 dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action;
422
423 for ( i = 1; i <= lastdfa; ++i )
424 {
425 int anum = dfaacc[i].dfaacc_state;
426
427 mkdata( anum );
428
429 if ( trace && anum )
430 fprintf( stderr, _( "state # %d accepts: [%d]\n" ),
431 i, anum );
432 }
433
434 dataend();
435
436 if ( useecs )
437 genecs();
438
439 /* Don't have to dump the actual full table entries - they were
440 * created on-the-fly.
441 */
442 }
443
444
445 /* Generate the code to find the next compressed-table state. */
446
447 void gen_next_compressed_state(char *char_map)
448 {
449 indent_put2s( "YY_CHAR yy_c = %s;", char_map );
450
451 /* Save the backing-up info \before/ computing the next state
452 * because we always compute one more state than needed - we
453 * always proceed until we reach a jam state
454 */
455 gen_backing_up();
456
457 indent_puts(
458 "while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )" );
459 indent_up();
460 indent_puts( "{" );
461 indent_puts( "yy_current_state = (int) yy_def[yy_current_state];" );
462
463 if ( usemecs )
464 {
465 /* We've arrange it so that templates are never chained
466 * to one another. This means we can afford to make a
467 * very simple test to see if we need to convert to
468 * yy_c's meta-equivalence class without worrying
469 * about erroneously looking up the meta-equivalence
470 * class twice
471 */
472 do_indent();
473
474 /* lastdfa + 2 is the beginning of the templates */
475 out_dec( "if ( yy_current_state >= %d )\n", lastdfa + 2 );
476
477 indent_up();
478 indent_puts( "yy_c = yy_meta[(unsigned int) yy_c];" );
479 indent_down();
480 }
481
482 indent_puts( "}" );
483 indent_down();
484
485 indent_puts(
486 "yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];" );
487 }
488
489
490 /* Generate the code to find the next match. */
491
492 void gen_next_match(void)
493 {
494 /* NOTE - changes in here should be reflected in gen_next_state() and
495 * gen_NUL_trans().
496 */
497 char *char_map = useecs ?
498 "yy_ec[YY_SC_TO_UI(*yy_cp)]" :
499 "YY_SC_TO_UI(*yy_cp)";
500
501 char *char_map_2 = useecs ?
502 "yy_ec[YY_SC_TO_UI(*++yy_cp)]" :
503 "YY_SC_TO_UI(*++yy_cp)";
504
505 if ( fulltbl )
506 {
507 indent_put2s(
508 "while ( (yy_current_state = yy_nxt[yy_current_state][%s]) > 0 )",
509 char_map );
510
511 indent_up();
512
513 if ( num_backing_up > 0 )
514 {
515 indent_puts( "{" ); /* } for vi */
516 gen_backing_up();
517 outc( '\n' );
518 }
519
520 indent_puts( "++yy_cp;" );
521
522 if ( num_backing_up > 0 )
523 /* { for vi */
524 indent_puts( "}" );
525
526 indent_down();
527
528 outc( '\n' );
529 indent_puts( "yy_current_state = -yy_current_state;" );
530 }
531
532 else if ( fullspd )
533 {
534 indent_puts( "{" ); /* } for vi */
535 indent_puts(
536 "yyconst struct yy_trans_info *yy_trans_info;\n" );
537 indent_puts( "YY_CHAR yy_c;\n" );
538 indent_put2s( "for ( yy_c = %s;", char_map );
539 indent_puts(
540 " (yy_trans_info = &yy_current_state[(unsigned int) yy_c])->" );
541 indent_puts( "yy_verify == yy_c;" );
542 indent_put2s( " yy_c = %s )", char_map_2 );
543
544 indent_up();
545
546 if ( num_backing_up > 0 )
547 indent_puts( "{" ); /* } for vi */
548
549 indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" );
550
551 if ( num_backing_up > 0 )
552 {
553 outc( '\n' );
554 gen_backing_up(); /* { for vi */
555 indent_puts( "}" );
556 }
557
558 indent_down(); /* { for vi */
559 indent_puts( "}" );
560 }
561
562 else
563 { /* compressed */
564 indent_puts( "do" );
565
566 indent_up();
567 indent_puts( "{" ); /* } for vi */
568
569 gen_next_state( false );
570
571 indent_puts( "++yy_cp;" );
572
573 /* { for vi */
574 indent_puts( "}" );
575 indent_down();
576
577 do_indent();
578
579 if ( interactive )
580 out_dec( "while ( yy_base[yy_current_state] != %d );\n",
581 jambase );
582 else
583 out_dec( "while ( yy_current_state != %d );\n",
584 jamstate );
585
586 if ( ! reject && ! interactive )
587 {
588 /* Do the guaranteed-needed backing up to figure out
589 * the match.
590 */
591 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
592 indent_puts(
593 "yy_current_state = yy_last_accepting_state;" );
594 }
595 }
596 }
597
598
599 /* Generate the code to find the next state. */
600
601 void gen_next_state(int worry_about_NULs)
602 { /* NOTE - changes in here should be reflected in gen_next_match() */
603 char char_map[256];
604
605 if ( worry_about_NULs && ! nultrans )
606 {
607 if ( useecs )
608 (void) sprintf( char_map,
609 "(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : %d)",
610 NUL_ec );
611 else
612 (void) sprintf( char_map,
613 "(*yy_cp ? YY_SC_TO_UI(*yy_cp) : %d)", NUL_ec );
614 }
615
616 else
617 strcpy( char_map, useecs ?
618 "yy_ec[YY_SC_TO_UI(*yy_cp)]" : "YY_SC_TO_UI(*yy_cp)" );
619
620 if ( worry_about_NULs && nultrans )
621 {
622 if ( ! fulltbl && ! fullspd )
623 /* Compressed tables back up *before* they match. */
624 gen_backing_up();
625
626 indent_puts( "if ( *yy_cp )" );
627 indent_up();
628 indent_puts( "{" ); /* } for vi */
629 }
630
631 if ( fulltbl )
632 indent_put2s(
633 "yy_current_state = yy_nxt[yy_current_state][%s];",
634 char_map );
635
636 else if ( fullspd )
637 indent_put2s(
638 "yy_current_state += yy_current_state[%s].yy_nxt;",
639 char_map );
640
641 else
642 gen_next_compressed_state( char_map );
643
644 if ( worry_about_NULs && nultrans )
645 {
646 /* { for vi */
647 indent_puts( "}" );
648 indent_down();
649 indent_puts( "else" );
650 indent_up();
651 indent_puts(
652 "yy_current_state = yy_NUL_trans[yy_current_state];" );
653 indent_down();
654 }
655
656 if ( fullspd || fulltbl )
657 gen_backing_up();
658
659 if ( reject )
660 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
661 }
662
663
664 /* Generate the code to make a NUL transition. */
665
666 void gen_NUL_trans(void)
667 { /* NOTE - changes in here should be reflected in gen_next_match() */
668 /* Only generate a definition for "yy_cp" if we'll generate code
669 * that uses it. Otherwise lint and the like complain.
670 */
671 int need_backing_up = (num_backing_up > 0 && ! reject);
672
673 if ( need_backing_up && (! nultrans || fullspd || fulltbl) )
674 /* We're going to need yy_cp lying around for the call
675 * below to gen_backing_up().
676 */
677 indent_puts( "char *yy_cp = yy_c_buf_p;" );
678
679 outc( '\n' );
680
681 if ( nultrans )
682 {
683 indent_puts(
684 "yy_current_state = yy_NUL_trans[yy_current_state];" );
685 indent_puts( "yy_is_jam = (yy_current_state == 0);" );
686 }
687
688 else if ( fulltbl )
689 {
690 do_indent();
691 out_dec( "yy_current_state = yy_nxt[yy_current_state][%d];\n",
692 NUL_ec );
693 indent_puts( "yy_is_jam = (yy_current_state <= 0);" );
694 }
695
696 else if ( fullspd )
697 {
698 do_indent();
699 out_dec( "int yy_c = %d;\n", NUL_ec );
700
701 indent_puts(
702 "yyconst struct yy_trans_info *yy_trans_info;\n" );
703 indent_puts(
704 "yy_trans_info = &yy_current_state[(unsigned int) yy_c];" );
705 indent_puts( "yy_current_state += yy_trans_info->yy_nxt;" );
706
707 indent_puts(
708 "yy_is_jam = (yy_trans_info->yy_verify != yy_c);" );
709 }
710
711 else
712 {
713 char NUL_ec_str[20];
714
715 (void) sprintf( NUL_ec_str, "%d", NUL_ec );
716 gen_next_compressed_state( NUL_ec_str );
717
718 do_indent();
719 out_dec( "yy_is_jam = (yy_current_state == %d);\n", jamstate );
720
721 if ( reject )
722 {
723 /* Only stack this state if it's a transition we
724 * actually make. If we stack it on a jam, then
725 * the state stack and yy_c_buf_p get out of sync.
726 */
727 indent_puts( "if ( ! yy_is_jam )" );
728 indent_up();
729 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
730 indent_down();
731 }
732 }
733
734 /* If we've entered an accepting state, back up; note that
735 * compressed tables have *already* done such backing up, so
736 * we needn't bother with it again.
737 */
738 if ( need_backing_up && (fullspd || fulltbl) )
739 {
740 outc( '\n' );
741 indent_puts( "if ( ! yy_is_jam )" );
742 indent_up();
743 indent_puts( "{" );
744 gen_backing_up();
745 indent_puts( "}" );
746 indent_down();
747 }
748 }
749
750
751 /* Generate the code to find the start state. */
752
753 void gen_start_state(void)
754 {
755 if ( fullspd )
756 {
757 if ( bol_needed )
758 {
759 indent_puts(
760 "yy_current_state = yy_start_state_list[yy_start + YY_AT_BOL()];" );
761 }
762 else
763 indent_puts(
764 "yy_current_state = yy_start_state_list[yy_start];" );
765 }
766
767 else
768 {
769 indent_puts( "yy_current_state = yy_start;" );
770
771 if ( bol_needed )
772 indent_puts( "yy_current_state += YY_AT_BOL();" );
773
774 if ( reject )
775 {
776 /* Set up for storing up states. */
777 indent_puts( "yy_state_ptr = yy_state_buf;" );
778 indent_puts( "*yy_state_ptr++ = yy_current_state;" );
779 }
780 }
781 }
782
783
784 /* gentabs - generate data statements for the transition tables */
785
786 void gentabs(void)
787 {
788 int i, j, k, *accset, nacc, *acc_array, total_states;
789 int end_of_buffer_action = num_rules + 1;
790
791 acc_array = allocate_integer_array( current_max_dfas );
792 nummt = 0;
793
794 /* The compressed table format jams by entering the "jam state",
795 * losing information about the previous state in the process.
796 * In order to recover the previous state, we effectively need
797 * to keep backing-up information.
798 */
799 ++num_backing_up;
800
801 if ( reject )
802 {
803 /* Write out accepting list and pointer list.
804 *
805 * First we generate the "yy_acclist" array. In the process,
806 * we compute the indices that will go into the "yy_accept"
807 * array, and save the indices in the dfaacc array.
808 */
809 int EOB_accepting_list[2];
810
811 /* Set up accepting structures for the End Of Buffer state. */
812 EOB_accepting_list[0] = 0;
813 EOB_accepting_list[1] = end_of_buffer_action;
814 accsiz[end_of_buffer_state] = 1;
815 dfaacc[end_of_buffer_state].dfaacc_set = EOB_accepting_list;
816
817 out_str_dec( long_align ? C_long_decl : C_short_decl,
818 "yy_acclist", MAX( numas, 1 ) + 1 );
819
820 j = 1; /* index into "yy_acclist" array */
821
822 for ( i = 1; i <= lastdfa; ++i )
823 {
824 acc_array[i] = j;
825
826 if ( accsiz[i] != 0 )
827 {
828 accset = dfaacc[i].dfaacc_set;
829 nacc = accsiz[i];
830
831 if ( trace )
832 fprintf( stderr,
833 _( "state # %d accepts: " ),
834 i );
835
836 for ( k = 1; k <= nacc; ++k )
837 {
838 int accnum = accset[k];
839
840 ++j;
841
842 if ( variable_trailing_context_rules &&
843 ! (accnum & YY_TRAILING_HEAD_MASK) &&
844 accnum > 0 && accnum <= num_rules &&
845 rule_type[accnum] == RULE_VARIABLE )
846 {
847 /* Special hack to flag
848 * accepting number as part
849 * of trailing context rule.
850 */
851 accnum |= YY_TRAILING_MASK;
852 }
853
854 mkdata( accnum );
855
856 if ( trace )
857 {
858 fprintf( stderr, "[%d]",
859 accset[k] );
860
861 if ( k < nacc )
862 fputs( ", ", stderr );
863 else
864 putc( '\n', stderr );
865 }
866 }
867 }
868 }
869
870 /* add accepting number for the "jam" state */
871 acc_array[i] = j;
872
873 dataend();
874 }
875
876 else
877 {
878 dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action;
879
880 for ( i = 1; i <= lastdfa; ++i )
881 acc_array[i] = dfaacc[i].dfaacc_state;
882
883 /* add accepting number for jam state */
884 acc_array[i] = 0;
885 }
886
887 /* Spit out "yy_accept" array. If we're doing "reject", it'll be
888 * pointers into the "yy_acclist" array. Otherwise it's actual
889 * accepting numbers. In either case, we just dump the numbers.
890 */
891
892 /* "lastdfa + 2" is the size of "yy_accept"; includes room for C arrays
893 * beginning at 0 and for "jam" state.
894 */
895 k = lastdfa + 2;
896
897 if ( reject )
898 /* We put a "cap" on the table associating lists of accepting
899 * numbers with state numbers. This is needed because we tell
900 * where the end of an accepting list is by looking at where
901 * the list for the next state starts.
902 */
903 ++k;
904
905 out_str_dec( long_align ? C_long_decl : C_short_decl, "yy_accept", k );
906
907 for ( i = 1; i <= lastdfa; ++i )
908 {
909 mkdata( acc_array[i] );
910
911 if ( ! reject && trace && acc_array[i] )
912 fprintf( stderr, _( "state # %d accepts: [%d]\n" ),
913 i, acc_array[i] );
914 }
915
916 /* Add entry for "jam" state. */
917 mkdata( acc_array[i] );
918
919 if ( reject )
920 /* Add "cap" for the list. */
921 mkdata( acc_array[i] );
922
923 dataend();
924
925 if ( useecs )
926 genecs();
927
928 if ( usemecs )
929 {
930 /* Write out meta-equivalence classes (used to index
931 * templates with).
932 */
933
934 if ( trace )
935 fputs( _( "\n\nMeta-Equivalence Classes:\n" ),
936 stderr );
937
938 out_str_dec( C_int_decl, "yy_meta", numecs + 1 );
939
940 for ( i = 1; i <= numecs; ++i )
941 {
942 if ( trace )
943 fprintf( stderr, "%d = %d\n",
944 i, ABS( tecbck[i] ) );
945
946 mkdata( ABS( tecbck[i] ) );
947 }
948
949 dataend();
950 }
951
952 total_states = lastdfa + numtemps;
953
954 out_str_dec( (tblend >= MAX_SHORT || long_align) ?
955 C_long_decl : C_short_decl,
956 "yy_base", total_states + 1 );
957
958 for ( i = 1; i <= lastdfa; ++i )
959 {
960 int d = def[i];
961
962 if ( base[i] == JAMSTATE )
963 base[i] = jambase;
964
965 if ( d == JAMSTATE )
966 def[i] = jamstate;
967
968 else if ( d < 0 )
969 {
970 /* Template reference. */
971 ++tmpuses;
972 def[i] = lastdfa - d + 1;
973 }
974
975 mkdata( base[i] );
976 }
977
978 /* Generate jam state's base index. */
979 mkdata( base[i] );
980
981 for ( ++i /* skip jam state */; i <= total_states; ++i )
982 {
983 mkdata( base[i] );
984 def[i] = jamstate;
985 }
986
987 dataend();
988
989 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
990 C_long_decl : C_short_decl,
991 "yy_def", total_states + 1 );
992
993 for ( i = 1; i <= total_states; ++i )
994 mkdata( def[i] );
995
996 dataend();
997
998 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
999 C_long_decl : C_short_decl,
1000 "yy_nxt", tblend + 1 );
1001
1002 for ( i = 1; i <= tblend; ++i )
1003 {
1004 /* Note, the order of the following test is important.
1005 * If chk[i] is 0, then nxt[i] is undefined.
1006 */
1007 if ( chk[i] == 0 || nxt[i] == 0 )
1008 nxt[i] = jamstate; /* new state is the JAM state */
1009
1010 mkdata( nxt[i] );
1011 }
1012
1013 dataend();
1014
1015 out_str_dec( (total_states >= MAX_SHORT || long_align) ?
1016 C_long_decl : C_short_decl,
1017 "yy_chk", tblend + 1 );
1018
1019 for ( i = 1; i <= tblend; ++i )
1020 {
1021 if ( chk[i] == 0 )
1022 ++nummt;
1023
1024 mkdata( chk[i] );
1025 }
1026
1027 dataend();
1028 }
1029
1030
1031 /* Write out a formatted string (with a secondary string argument) at the
1032 * current indentation level, adding a final newline.
1033 */
1034
1035 void indent_put2s(char *fmt, char *arg)
1036 {
1037 do_indent();
1038 out_str( fmt, arg );
1039 outn( "" );
1040 }
1041
1042
1043 /* Write out a string at the current indentation level, adding a final
1044 * newline.
1045 */
1046
1047 void indent_puts(char *str)
1048 {
1049 do_indent();
1050 outn( str );
1051 }
1052
1053
1054 /* make_tables - generate transition tables and finishes generating output file
1055 */
1056
1057 void make_tables(void)
1058 {
1059 int i;
1060 int did_eof_rule = false;
1061
1062 skelout();
1063
1064 /* First, take care of YY_DO_BEFORE_ACTION depending on yymore
1065 * being used.
1066 */
1067 set_indent( 1 );
1068
1069 if ( yymore_used && ! yytext_is_array )
1070 {
1071 indent_puts( "yytext_ptr -= yy_more_len; \\" );
1072 indent_puts( "yyleng = (int) (yy_cp - yytext_ptr); \\" );
1073 }
1074
1075 else
1076 indent_puts( "yyleng = (int) (yy_cp - yy_bp); \\" );
1077
1078 /* Now also deal with copying yytext_ptr to yytext if needed. */
1079 skelout();
1080 if ( yytext_is_array )
1081 {
1082 if ( yymore_used )
1083 indent_puts(
1084 "if ( yyleng + yy_more_offset >= YYLMAX ) \\" );
1085 else
1086 indent_puts( "if ( yyleng >= YYLMAX ) \\" );
1087
1088 indent_up();
1089 indent_puts(
1090 "YY_FATAL_ERROR( \"token too large, exceeds YYLMAX\" ); \\" );
1091 indent_down();
1092
1093 if ( yymore_used )
1094 {
1095 indent_puts(
1096 "yy_flex_strncpy( &yytext[yy_more_offset], yytext_ptr, yyleng + 1 ); \\" );
1097 indent_puts( "yyleng += yy_more_offset; \\" );
1098 indent_puts(
1099 "yy_prev_more_offset = yy_more_offset; \\" );
1100 indent_puts( "yy_more_offset = 0; \\" );
1101 }
1102 else
1103 {
1104 indent_puts(
1105 "yy_flex_strncpy( yytext, yytext_ptr, yyleng + 1 ); \\" );
1106 }
1107 }
1108
1109 set_indent( 0 );
1110
1111 skelout();
1112
1113
1114 out_dec( "#define YY_NUM_RULES %d\n", num_rules );
1115 out_dec( "#define YY_END_OF_BUFFER %d\n", num_rules + 1 );
1116
1117 if ( fullspd )
1118 {
1119 /* Need to define the transet type as a size large
1120 * enough to hold the biggest offset.
1121 */
1122 int total_table_size = tblend + numecs + 1;
1123 char *trans_offset_type =
1124 (total_table_size >= MAX_SHORT || long_align) ?
1125 "long" : "short";
1126
1127 set_indent( 0 );
1128 indent_puts( "struct yy_trans_info" );
1129 indent_up();
1130 indent_puts( "{" ); /* } for vi */
1131
1132 if ( long_align )
1133 indent_puts( "long yy_verify;" );
1134 else
1135 indent_puts( "short yy_verify;" );
1136
1137 /* In cases where its sister yy_verify *is* a "yes, there is
1138 * a transition", yy_nxt is the offset (in records) to the
1139 * next state. In most cases where there is no transition,
1140 * the value of yy_nxt is irrelevant. If yy_nxt is the -1th
1141 * record of a state, though, then yy_nxt is the action number
1142 * for that state.
1143 */
1144
1145 indent_put2s( "%s yy_nxt;", trans_offset_type );
1146 indent_puts( "};" );
1147 indent_down();
1148 }
1149
1150 if ( fullspd )
1151 genctbl();
1152 else if ( fulltbl )
1153 genftbl();
1154 else
1155 gentabs();
1156
1157 /* Definitions for backing up. We don't need them if REJECT
1158 * is being used because then we use an alternative backin-up
1159 * technique instead.
1160 */
1161 if ( num_backing_up > 0 && ! reject )
1162 {
1163 if ( ! C_plus_plus )
1164 {
1165 indent_puts(
1166 "static yy_state_type yy_last_accepting_state;" );
1167 indent_puts(
1168 "static char *yy_last_accepting_cpos;\n" );
1169 }
1170 }
1171
1172 if ( nultrans )
1173 {
1174 out_str_dec( C_state_decl, "yy_NUL_trans", lastdfa + 1 );
1175
1176 for ( i = 1; i <= lastdfa; ++i )
1177 {
1178 if ( fullspd )
1179 out_dec( " &yy_transition[%d],\n", base[i] );
1180 else
1181 mkdata( nultrans[i] );
1182 }
1183
1184 dataend();
1185 }
1186
1187 if ( ddebug )
1188 { /* Spit out table mapping rules to line numbers. */
1189 if ( ! C_plus_plus )
1190 {
1191 indent_puts( "extern int yy_flex_debug;" );
1192 indent_puts( "int yy_flex_debug = 1;\n" );
1193 }
1194
1195 out_str_dec( long_align ? C_long_decl : C_short_decl,
1196 "yy_rule_linenum", num_rules );
1197 for ( i = 1; i < num_rules; ++i )
1198 mkdata( rule_linenum[i] );
1199 dataend();
1200 }
1201
1202 if ( reject )
1203 {
1204 /* Declare state buffer variables. */
1205 if ( ! C_plus_plus )
1206 {
1207 outn(
1208 "static yy_state_type yy_state_buf[YY_BUF_SIZE + 2], *yy_state_ptr;" );
1209 outn( "static char *yy_full_match;" );
1210 outn( "static int yy_lp;" );
1211 }
1212
1213 if ( variable_trailing_context_rules )
1214 {
1215 if ( ! C_plus_plus )
1216 {
1217 outn(
1218 "static int yy_looking_for_trail_begin = 0;" );
1219 outn( "static int yy_full_lp;" );
1220 outn( "static int *yy_full_state;" );
1221 }
1222
1223 out_hex( "#define YY_TRAILING_MASK 0x%x\n",
1224 (unsigned int) YY_TRAILING_MASK );
1225 out_hex( "#define YY_TRAILING_HEAD_MASK 0x%x\n",
1226 (unsigned int) YY_TRAILING_HEAD_MASK );
1227 }
1228
1229 outn( "#define REJECT \\" );
1230 outn( "{ \\" ); /* } for vi */
1231 outn(
1232 "*yy_cp = yy_hold_char; /* undo effects of setting up yytext */ \\" );
1233 outn(
1234 "yy_cp = yy_full_match; /* restore poss. backed-over text */ \\" );
1235
1236 if ( variable_trailing_context_rules )
1237 {
1238 outn(
1239 "yy_lp = yy_full_lp; /* restore orig. accepting pos. */ \\" );
1240 outn(
1241 "yy_state_ptr = yy_full_state; /* restore orig. state */ \\" );
1242 outn(
1243 "yy_current_state = *yy_state_ptr; /* restore curr. state */ \\" );
1244 }
1245
1246 outn( "++yy_lp; \\" );
1247 outn( "goto find_rule; \\" );
1248 /* { for vi */
1249 outn( "}" );
1250 }
1251
1252 else
1253 {
1254 outn(
1255 "/* The intent behind this definition is that it'll catch" );
1256 outn( " * any uses of REJECT which flex missed." );
1257 outn( " */" );
1258 outn( "#define REJECT reject_used_but_not_detected" );
1259 }
1260
1261 if ( yymore_used )
1262 {
1263 if ( ! C_plus_plus )
1264 {
1265 if ( yytext_is_array )
1266 {
1267 indent_puts( "static int yy_more_offset = 0;" );
1268 indent_puts(
1269 "static int yy_prev_more_offset = 0;" );
1270 }
1271 else
1272 {
1273 indent_puts( "static int yy_more_flag = 0;" );
1274 indent_puts( "static int yy_more_len = 0;" );
1275 }
1276 }
1277
1278 if ( yytext_is_array )
1279 {
1280 indent_puts(
1281 "#define yymore() (yy_more_offset = yy_flex_strlen( yytext ))" );
1282 indent_puts( "#define YY_NEED_STRLEN" );
1283 indent_puts( "#define YY_MORE_ADJ 0" );
1284 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET \\" );
1285 indent_up();
1286 indent_puts( "{ \\" );
1287 indent_puts( "yy_more_offset = yy_prev_more_offset; \\" );
1288 indent_puts( "yyleng -= yy_more_offset; \\" );
1289 indent_puts( "}" );
1290 indent_down();
1291 }
1292 else
1293 {
1294 indent_puts( "#define yymore() (yy_more_flag = 1)" );
1295 indent_puts( "#define YY_MORE_ADJ yy_more_len" );
1296 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" );
1297 }
1298 }
1299
1300 else
1301 {
1302 indent_puts( "#define yymore() yymore_used_but_not_detected" );
1303 indent_puts( "#define YY_MORE_ADJ 0" );
1304 indent_puts( "#define YY_RESTORE_YY_MORE_OFFSET" );
1305 }
1306
1307 if ( ! C_plus_plus )
1308 {
1309 if ( yytext_is_array )
1310 {
1311 outn( "#ifndef YYLMAX" );
1312 outn( "#define YYLMAX 8192" );
1313 outn( "#endif\n" );
1314 outn( "char yytext[YYLMAX];" );
1315 outn( "char *yytext_ptr;" );
1316 }
1317
1318 else
1319 outn( "char *yytext;" );
1320 }
1321
1322 out( &action_array[defs1_offset] );
1323
1324 line_directive_out( stdout, 0 );
1325
1326 skelout();
1327
1328 if ( ! C_plus_plus )
1329 {
1330 if ( use_read )
1331 {
1332 outn(
1333 "\tif ( (result = read( fileno(yyin), (char *) buf, max_size )) < 0 ) \\" );
1334 outn(
1335 "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" );
1336 }
1337
1338 else
1339 {
1340 outn(
1341 "\tif ( yy_current_buffer->yy_is_interactive ) \\" );
1342 outn( "\t\t{ \\" );
1343 outn( "\t\tint c = '*', n; \\" );
1344 outn( "\t\tfor ( n = 0; n < max_size && \\" );
1345 outn( "\t\t\t (c = getc( yyin )) != EOF && c != '\\n'; ++n ) \\" );
1346 outn( "\t\t\tbuf[n] = (char) c; \\" );
1347 outn( "\t\tif ( c == '\\n' ) \\" );
1348 outn( "\t\t\tbuf[n++] = (char) c; \\" );
1349 outn( "\t\tif ( c == EOF && ferror( yyin ) ) \\" );
1350 outn(
1351 "\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\" );
1352 outn( "\t\tresult = n; \\" );
1353 outn( "\t\t} \\" );
1354 outn(
1355 "\telse if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \\" );
1356 outn( "\t\t && ferror( yyin ) ) \\" );
1357 outn(
1358 "\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" );" );
1359 }
1360 }
1361
1362 skelout();
1363
1364 indent_puts( "#define YY_RULE_SETUP \\" );
1365 indent_up();
1366 if ( bol_needed )
1367 {
1368 indent_puts( "if ( yyleng > 0 ) \\" );
1369 indent_up();
1370 indent_puts( "yy_current_buffer->yy_at_bol = \\" );
1371 indent_puts( "\t\t(yytext[yyleng - 1] == '\\n'); \\" );
1372 indent_down();
1373 }
1374 indent_puts( "YY_USER_ACTION" );
1375 indent_down();
1376
1377 skelout();
1378
1379 /* Copy prolog to output file. */
1380 out( &action_array[prolog_offset] );
1381
1382 line_directive_out( stdout, 0 );
1383
1384 skelout();
1385
1386 set_indent( 2 );
1387
1388 if ( yymore_used && ! yytext_is_array )
1389 {
1390 indent_puts( "yy_more_len = 0;" );
1391 indent_puts( "if ( yy_more_flag )" );
1392 indent_up();
1393 indent_puts( "{" );
1394 indent_puts( "yy_more_len = yy_c_buf_p - yytext_ptr;" );
1395 indent_puts( "yy_more_flag = 0;" );
1396 indent_puts( "}" );
1397 indent_down();
1398 }
1399
1400 skelout();
1401
1402 gen_start_state();
1403
1404 /* Note, don't use any indentation. */
1405 outn( "yy_match:" );
1406 gen_next_match();
1407
1408 skelout();
1409 set_indent( 2 );
1410 gen_find_action();
1411
1412 skelout();
1413 if ( do_yylineno )
1414 {
1415 indent_puts( "if ( yy_act != YY_END_OF_BUFFER )" );
1416 indent_up();
1417 indent_puts( "{" );
1418 indent_puts( "int yyl;" );
1419 indent_puts( "for ( yyl = 0; yyl < yyleng; ++yyl )" );
1420 indent_up();
1421 indent_puts( "if ( yytext[yyl] == '\\n' )" );
1422 indent_up();
1423 indent_puts( "++yylineno;" );
1424 indent_down();
1425 indent_down();
1426 indent_puts( "}" );
1427 indent_down();
1428 }
1429
1430 skelout();
1431 if ( ddebug )
1432 {
1433 indent_puts( "if ( yy_flex_debug )" );
1434 indent_up();
1435
1436 indent_puts( "{" );
1437 indent_puts( "if ( yy_act == 0 )" );
1438 indent_up();
1439 indent_puts( C_plus_plus ?
1440 "cerr << \"--scanner backing up\\n\";" :
1441 "fprintf( stderr, \"--scanner backing up\\n\" );" );
1442 indent_down();
1443
1444 do_indent();
1445 out_dec( "else if ( yy_act < %d )\n", num_rules );
1446 indent_up();
1447
1448 if ( C_plus_plus )
1449 {
1450 indent_puts(
1451 "cerr << \"--accepting rule at line \" << yy_rule_linenum[yy_act] <<" );
1452 indent_puts(
1453 " \"(\\\"\" << yytext << \"\\\")\\n\";" );
1454 }
1455 else
1456 {
1457 indent_puts(
1458 "fprintf( stderr, \"--accepting rule at line %d (\\\"%s\\\")\\n\"," );
1459
1460 indent_puts(
1461 " yy_rule_linenum[yy_act], yytext );" );
1462 }
1463
1464 indent_down();
1465
1466 do_indent();
1467 out_dec( "else if ( yy_act == %d )\n", num_rules );
1468 indent_up();
1469
1470 if ( C_plus_plus )
1471 {
1472 indent_puts(
1473 "cerr << \"--accepting default rule (\\\"\" << yytext << \"\\\")\\n\";" );
1474 }
1475 else
1476 {
1477 indent_puts(
1478 "fprintf( stderr, \"--accepting default rule (\\\"%s\\\")\\n\"," );
1479 indent_puts( " yytext );" );
1480 }
1481
1482 indent_down();
1483
1484 do_indent();
1485 out_dec( "else if ( yy_act == %d )\n", num_rules + 1 );
1486 indent_up();
1487
1488 indent_puts( C_plus_plus ?
1489 "cerr << \"--(end of buffer or a NUL)\\n\";" :
1490 "fprintf( stderr, \"--(end of buffer or a NUL)\\n\" );" );
1491
1492 indent_down();
1493
1494 do_indent();
1495 outn( "else" );
1496 indent_up();
1497
1498 if ( C_plus_plus )
1499 {
1500 indent_puts(
1501 "cerr << \"--EOF (start condition \" << YY_START << \")\\n\";" );
1502 }
1503 else
1504 {
1505 indent_puts(
1506 "fprintf( stderr, \"--EOF (start condition %d)\\n\", YY_START );" );
1507 }
1508
1509 indent_down();
1510
1511 indent_puts( "}" );
1512 indent_down();
1513 }
1514
1515 /* Copy actions to output file. */
1516 skelout();
1517 indent_up();
1518 gen_bu_action();
1519 out( &action_array[action_offset] );
1520
1521 line_directive_out( stdout, 0 );
1522
1523 /* generate cases for any missing EOF rules */
1524 for ( i = 1; i <= lastsc; ++i )
1525 if ( ! sceof[i] )
1526 {
1527 do_indent();
1528 out_str( "case YY_STATE_EOF(%s):\n", scname[i] );
1529 did_eof_rule = true;
1530 }
1531
1532 if ( did_eof_rule )
1533 {
1534 indent_up();
1535 indent_puts( "yyterminate();" );
1536 indent_down();
1537 }
1538
1539
1540 /* Generate code for handling NUL's, if needed. */
1541
1542 /* First, deal with backing up and setting up yy_cp if the scanner
1543 * finds that it should JAM on the NUL.
1544 */
1545 skelout();
1546 set_indent( 4 );
1547
1548 if ( fullspd || fulltbl )
1549 indent_puts( "yy_cp = yy_c_buf_p;" );
1550
1551 else
1552 { /* compressed table */
1553 if ( ! reject && ! interactive )
1554 {
1555 /* Do the guaranteed-needed backing up to figure
1556 * out the match.
1557 */
1558 indent_puts( "yy_cp = yy_last_accepting_cpos;" );
1559 indent_puts(
1560 "yy_current_state = yy_last_accepting_state;" );
1561 }
1562
1563 else
1564 /* Still need to initialize yy_cp, though
1565 * yy_current_state was set up by
1566 * yy_get_previous_state().
1567 */
1568 indent_puts( "yy_cp = yy_c_buf_p;" );
1569 }
1570
1571
1572 /* Generate code for yy_get_previous_state(). */
1573 set_indent( 1 );
1574 skelout();
1575
1576 gen_start_state();
1577
1578 set_indent( 2 );
1579 skelout();
1580 gen_next_state( true );
1581
1582 set_indent( 1 );
1583 skelout();
1584 gen_NUL_trans();
1585
1586 skelout();
1587 if ( do_yylineno )
1588 { /* update yylineno inside of unput() */
1589 indent_puts( "if ( c == '\\n' )" );
1590 indent_up();
1591 indent_puts( "--yylineno;" );
1592 indent_down();
1593 }
1594
1595 skelout();
1596 /* Update BOL and yylineno inside of input(). */
1597 if ( bol_needed )
1598 {
1599 indent_puts( "yy_current_buffer->yy_at_bol = (c == '\\n');" );
1600 if ( do_yylineno )
1601 {
1602 indent_puts( "if ( yy_current_buffer->yy_at_bol )" );
1603 indent_up();
1604 indent_puts( "++yylineno;" );
1605 indent_down();
1606 }
1607 }
1608
1609 else if ( do_yylineno )
1610 {
1611 indent_puts( "if ( c == '\\n' )" );
1612 indent_up();
1613 indent_puts( "++yylineno;" );
1614 indent_down();
1615 }
1616
1617 skelout();
1618
1619 /* Copy remainder of input to output. */
1620
1621 line_directive_out( stdout, 1 );
1622
1623 if ( sectnum == 3 )
1624 (void) flexscan(); /* copy remainder of input to output */
1625 }
DragonFly BSD