source: trunk/essentials/sys-devel/flex/scan.l@ 3466

Last change on this file since 3466 was 3043, checked in by bird, 19 years ago

-> essentials
File size: 20.4 KB
Line 
1/* scan.l - scanner for flex input -*-C-*- */
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/* This file is part of flex. */
15
16/* Redistribution and use in source and binary forms, with or without */
17/* modification, are permitted provided that the following conditions */
18/* are met: */
19
20/* 1. Redistributions of source code must retain the above copyright */
21/* notice, this list of conditions and the following disclaimer. */
22/* 2. Redistributions in binary form must reproduce the above copyright */
23/* notice, this list of conditions and the following disclaimer in the */
24/* documentation and/or other materials provided with the distribution. */
25
26/* Neither the name of the University nor the names of its contributors */
27/* may be used to endorse or promote products derived from this software */
28/* without specific prior written permission. */
29
30/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
31/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
32/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
33/* PURPOSE. */
34
35#include "flexdef.h"
36#include "parse.h"
37extern bool tablesverify, tablesext;
38extern int trlcontxt; /* Set in parse.y for each rule. */
39
40#define ACTION_ECHO add_action( yytext )
41#define ACTION_IFDEF(def, should_define) \
42 { \
43 if ( should_define ) \
44 action_define( def, 1 ); \
45 }
46
47#define ACTION_M4_IFDEF(def, should_define) \
48 do{ \
49 if ( should_define ) \
50 buf_m4_define( &m4defs_buf, def, NULL);\
51 else \
52 buf_m4_undefine( &m4defs_buf, def);\
53 } while(0)
54
55#define MARK_END_OF_PROLOG mark_prolog();
56
57#define YY_DECL \
58 int flexscan()
59
60#define RETURNCHAR \
61 yylval = (unsigned char) yytext[0]; \
62 return CHAR;
63
64#define RETURNNAME \
65 if(yyleng < MAXLINE) \
66 { \
67 strcpy( nmstr, yytext ); \
68 } \
69 else \
70 { \
71 synerr(_("Input line too long\n")); \
72 FLEX_EXIT(EXIT_FAILURE); \
73 } \
74 return NAME;
75
76#define PUT_BACK_STRING(str, start) \
77 for ( i = strlen( str ) - 1; i >= start; --i ) \
78 unput((str)[i])
79
80#define CHECK_REJECT(str) \
81 if ( all_upper( str ) ) \
82 reject = true;
83
84#define CHECK_YYMORE(str) \
85 if ( all_lower( str ) ) \
86 yymore_used = true;
87
88#define YY_USER_INIT \
89 if ( getenv("POSIXLY_CORRECT") ) \
90 posix_compat = true;
91
92%}
93
94%option caseless nodefault stack noyy_top_state
95%option nostdinit
96
97%x SECT2 SECT2PROLOG SECT3 CODEBLOCK PICKUPDEF SC CARETISBOL NUM QUOTE
98%x FIRSTCCL CCL ACTION RECOVER COMMENT ACTION_STRING PERCENT_BRACE_ACTION
99%x OPTION LINEDIR CODEBLOCK_MATCH_BRACE
100
101WS [[:blank:]]+
102OPTWS [[:blank:]]*
103NOT_WS [^[:blank:]\r\n]
104
105NL \r?\n
106
107NAME ([[:alpha:]_][[:alnum:]_-]*)
108NOT_NAME [^[:alpha:]_*\n]+
109
110SCNAME {NAME}
111
112ESCSEQ (\\([^\n]|[0-7]{1,3}|x[[:xdigit:]]{1,2}))
113
114FIRST_CCL_CHAR ([^\\\n]|{ESCSEQ})
115CCL_CHAR ([^\\\n\]]|{ESCSEQ})
116CCL_EXPR ("[:"[[:alpha:]]+":]")
117
118LEXOPT [aceknopr]
119
120%%
121 static int bracelevel, didadef, indented_code;
122 static int doing_rule_action = false;
123 static int option_sense;
124
125 int doing_codeblock = false;
126 int i, brace_depth=0, brace_start_line=0;
127 Char nmdef[MAXLINE];
128
129
130<INITIAL>{
131 ^{WS} indented_code = true; BEGIN(CODEBLOCK);
132 ^"/*" ACTION_ECHO; yy_push_state( COMMENT );
133 ^#{OPTWS}line{WS} yy_push_state( LINEDIR );
134 ^"%s"{NAME}? return SCDECL;
135 ^"%x"{NAME}? return XSCDECL;
136 ^"%{".*{NL} {
137 ++linenum;
138 line_directive_out( (FILE *) 0, 1 );
139 indented_code = false;
140 BEGIN(CODEBLOCK);
141 }
142 ^"%top"[[:blank:]]*"{"[[:blank:]]*{NL} {
143 brace_start_line = linenum;
144 ++linenum;
145 buf_linedir( &top_buf, infilename?infilename:"<stdin>", linenum);
146 brace_depth = 1;
147 yy_push_state(CODEBLOCK_MATCH_BRACE);
148 }
149
150 ^"%top".* synerr( _("malformed '%top' directive") );
151
152 {WS} /* discard */
153
154 ^"%%".* {
155 sectnum = 2;
156 bracelevel = 0;
157 mark_defs1();
158 line_directive_out( (FILE *) 0, 1 );
159 BEGIN(SECT2PROLOG);
160 return SECTEND;
161 }
162
163 ^"%pointer".*{NL} yytext_is_array = false; ++linenum;
164 ^"%array".*{NL} yytext_is_array = true; ++linenum;
165
166 ^"%option" BEGIN(OPTION); return OPTION_OP;
167
168 ^"%"{LEXOPT}{OPTWS}[[:digit:]]*{OPTWS}{NL} ++linenum; /* ignore */
169 ^"%"{LEXOPT}{WS}.*{NL} ++linenum; /* ignore */
170
171 /* xgettext: no-c-format */
172 ^"%"[^sxaceknopr{}].* synerr( _( "unrecognized '%' directive" ) );
173
174 ^{NAME} {
175 if(yyleng < MAXLINE)
176 {
177 strcpy( nmstr, yytext );
178 }
179 else
180 {
181 synerr( _("Input line too long\n"));
182 FLEX_EXIT(EXIT_FAILURE);
183 }
184
185 didadef = false;
186 BEGIN(PICKUPDEF);
187 }
188
189 {SCNAME} RETURNNAME;
190 ^{OPTWS}{NL} ++linenum; /* allows blank lines in section 1 */
191 {OPTWS}{NL} ACTION_ECHO; ++linenum; /* maybe end of comment line */
192}
193
194
195<COMMENT>{
196 "*/" ACTION_ECHO; yy_pop_state();
197 "*" ACTION_ECHO;
198 [^*\n]+ ACTION_ECHO;
199 [^*\n]*{NL} ++linenum; ACTION_ECHO;
200}
201
202<LINEDIR>{
203 \n yy_pop_state();
204 [[:digit:]]+ linenum = myctoi( yytext );
205
206 \"[^"\n]*\" {
207 flex_free( (void *) infilename );
208 infilename = copy_string( yytext + 1 );
209 infilename[strlen( infilename ) - 1] = '\0';
210 }
211 . /* ignore spurious characters */
212}
213
214<CODEBLOCK>{
215 ^"%}".*{NL} ++linenum; BEGIN(INITIAL);
216
217 {NAME}|{NOT_NAME}|. ACTION_ECHO;
218
219 {NL} {
220 ++linenum;
221 ACTION_ECHO;
222 if ( indented_code )
223 BEGIN(INITIAL);
224 }
225}
226
227<CODEBLOCK_MATCH_BRACE>{
228 "}" {
229 if( --brace_depth == 0){
230 /* TODO: Matched. */
231 yy_pop_state();
232 }else
233 buf_strnappend(&top_buf, yytext, yyleng);
234 }
235
236 "{" {
237 brace_depth++;
238 buf_strnappend(&top_buf, yytext, yyleng);
239 }
240
241 {NL} {
242 ++linenum;
243 buf_strnappend(&top_buf, yytext, yyleng);
244 }
245
246 [^{}\r\n]+ {
247 buf_strnappend(&top_buf, yytext, yyleng);
248 }
249
250 <<EOF>> {
251 linenum = brace_start_line;
252 synerr(_("Unmatched '{'"));
253 yyterminate();
254 }
255}
256
257
258<PICKUPDEF>{
259 {WS} /* separates name and definition */
260
261 {NOT_WS}[^\r\n]* {
262 if(yyleng < MAXLINE)
263 {
264 strcpy( (char *) nmdef, yytext );
265 }
266 else
267 {
268 synerr( _("Input line too long\n"));
269 FLEX_EXIT(EXIT_FAILURE);
270 }
271 /* Skip trailing whitespace. */
272 for ( i = strlen( (char *) nmdef ) - 1;
273 i >= 0 && (nmdef[i] == ' ' || nmdef[i] == '\t');
274 --i )
275 ;
276
277 nmdef[i + 1] = '\0';
278
279 ndinstal( nmstr, nmdef );
280 didadef = true;
281 }
282
283 {NL} {
284 if ( ! didadef )
285 synerr( _( "incomplete name definition" ) );
286 BEGIN(INITIAL);
287 ++linenum;
288 }
289}
290
291
292<OPTION>{
293 {NL} ++linenum; BEGIN(INITIAL);
294 {WS} option_sense = true;
295
296 "=" return '=';
297
298 no option_sense = ! option_sense;
299
300 7bit csize = option_sense ? 128 : 256;
301 8bit csize = option_sense ? 256 : 128;
302
303 align long_align = option_sense;
304 always-interactive {
305 ACTION_M4_IFDEF( "M4""_YY_ALWAYS_INTERACTIVE", option_sense );
306 interactive = option_sense;
307 }
308 array yytext_is_array = option_sense;
309 ansi-definitions ansi_func_defs = option_sense;
310 ansi-prototypes ansi_func_protos = option_sense;
311 backup backing_up_report = option_sense;
312 batch interactive = ! option_sense;
313 bison-bridge bison_bridge_lval = option_sense;
314 bison-locations { if((bison_bridge_lloc = option_sense))
315 bison_bridge_lval = true;
316 }
317 "c++" C_plus_plus = option_sense;
318 caseful|case-sensitive caseins = ! option_sense;
319 caseless|case-insensitive caseins = option_sense;
320 debug ddebug = option_sense;
321 default spprdflt = ! option_sense;
322 ecs useecs = option_sense;
323 fast {
324 useecs = usemecs = false;
325 use_read = fullspd = true;
326 }
327 full {
328 useecs = usemecs = false;
329 use_read = fulltbl = true;
330 }
331 input ACTION_IFDEF("YY_NO_INPUT", ! option_sense);
332 interactive interactive = option_sense;
333 lex-compat lex_compat = option_sense;
334 posix-compat posix_compat = option_sense;
335 main {
336 ACTION_M4_IFDEF( "M4""_YY_MAIN", option_sense);
337 /* Override yywrap */
338 if( option_sense == true )
339 do_yywrap = false;
340 }
341 meta-ecs usemecs = option_sense;
342 never-interactive {
343 ACTION_M4_IFDEF( "M4""_YY_NEVER_INTERACTIVE", option_sense );
344 interactive = !option_sense;
345 }
346 perf-report performance_report += option_sense ? 1 : -1;
347 pointer yytext_is_array = ! option_sense;
348 read use_read = option_sense;
349 reentrant reentrant = option_sense;
350 reject reject_really_used = option_sense;
351 stack ACTION_M4_IFDEF( "M4""_YY_STACK_USED", option_sense );
352 stdinit do_stdinit = option_sense;
353 stdout use_stdout = option_sense;
354 unistd ACTION_IFDEF("YY_NO_UNISTD_H", ! option_sense);
355 unput ACTION_M4_IFDEF("M4""_YY_NO_UNPUT", ! option_sense);
356 verbose printstats = option_sense;
357 warn nowarn = ! option_sense;
358 yylineno do_yylineno = option_sense; ACTION_M4_IFDEF("M4""_YY_USE_LINENO", option_sense);
359 yymore yymore_really_used = option_sense;
360 yywrap do_yywrap = option_sense;
361
362 yy_push_state ACTION_M4_IFDEF("M4""_YY_NO_PUSH_STATE", ! option_sense);
363 yy_pop_state ACTION_M4_IFDEF("M4""_YY_NO_POP_STATE", ! option_sense);
364 yy_top_state ACTION_M4_IFDEF("M4""_YY_NO_TOP_STATE", ! option_sense);
365
366 yy_scan_buffer ACTION_M4_IFDEF("M4""_YY_NO_SCAN_BUFFER", ! option_sense);
367 yy_scan_bytes ACTION_M4_IFDEF("M4""_YY_NO_SCAN_BYTES", ! option_sense);
368 yy_scan_string ACTION_M4_IFDEF("M4""_YY_NO_SCAN_STRING", ! option_sense);
369
370 yyalloc ACTION_M4_IFDEF("M4""_YY_NO_FLEX_ALLOC", ! option_sense);
371 yyrealloc ACTION_M4_IFDEF("M4""_YY_NO_FLEX_REALLOC", ! option_sense);
372 yyfree ACTION_M4_IFDEF("M4""_YY_NO_FLEX_FREE", ! option_sense);
373
374 yyget_debug ACTION_M4_IFDEF("M4""_YY_NO_GET_DEBUG", ! option_sense);
375 yyset_debug ACTION_M4_IFDEF("M4""_YY_NO_SET_DEBUG", ! option_sense);
376 yyget_extra ACTION_M4_IFDEF("M4""_YY_NO_GET_EXTRA", ! option_sense);
377 yyset_extra ACTION_M4_IFDEF("M4""_YY_NO_SET_EXTRA", ! option_sense);
378 yyget_leng ACTION_M4_IFDEF("M4""_YY_NO_GET_LENG", ! option_sense);
379 yyget_text ACTION_M4_IFDEF("M4""_YY_NO_GET_TEXT", ! option_sense);
380 yyget_lineno ACTION_M4_IFDEF("M4""_YY_NO_GET_LINENO", ! option_sense);
381 yyset_lineno ACTION_M4_IFDEF("M4""_YY_NO_SET_LINENO", ! option_sense);
382 yyget_in ACTION_M4_IFDEF("M4""_YY_NO_GET_IN", ! option_sense);
383 yyset_in ACTION_M4_IFDEF("M4""_YY_NO_SET_IN", ! option_sense);
384 yyget_out ACTION_M4_IFDEF("M4""_YY_NO_GET_OUT", ! option_sense);
385 yyset_out ACTION_M4_IFDEF("M4""_YY_NO_SET_OUT", ! option_sense);
386 yyget_lval ACTION_M4_IFDEF("M4""_YY_NO_GET_LVAL", ! option_sense);
387 yyset_lval ACTION_M4_IFDEF("M4""_YY_NO_SET_LVAL", ! option_sense);
388 yyget_lloc ACTION_M4_IFDEF("M4""_YY_NO_GET_LLOC", ! option_sense);
389 yyset_lloc ACTION_M4_IFDEF("M4""_YY_NO_SET_LLOC", ! option_sense);
390
391 outfile return OPT_OUTFILE;
392 prefix return OPT_PREFIX;
393 yyclass return OPT_YYCLASS;
394 header(-file)? return OPT_HEADER;
395 tables-file return OPT_TABLES;
396 tables-verify {
397 tablesverify = option_sense;
398 if(!tablesext && option_sense)
399 tablesext = true;
400 }
401
402
403 \"[^"\n]*\" {
404 if(yyleng-1 < MAXLINE)
405 {
406 strcpy( nmstr, yytext + 1 );
407 }
408 else
409 {
410 synerr( _("Input line too long\n"));
411 FLEX_EXIT(EXIT_FAILURE);
412 }
413 nmstr[strlen( nmstr ) - 1] = '\0';
414 return NAME;
415 }
416
417 (([a-mo-z]|n[a-np-z])[[:alpha:]\-+]*)|. {
418 format_synerr( _( "unrecognized %%option: %s" ),
419 yytext );
420 BEGIN(RECOVER);
421 }
422}
423
424<RECOVER>.*{NL} ++linenum; BEGIN(INITIAL);
425
426
427<SECT2PROLOG>{
428 ^"%{".* ++bracelevel; yyless( 2 ); /* eat only %{ */
429 ^"%}".* --bracelevel; yyless( 2 ); /* eat only %} */
430
431 ^{WS}.* ACTION_ECHO; /* indented code in prolog */
432
433 ^{NOT_WS}.* { /* non-indented code */
434 if ( bracelevel <= 0 )
435 { /* not in %{ ... %} */
436 yyless( 0 ); /* put it all back */
437 yy_set_bol( 1 );
438 mark_prolog();
439 BEGIN(SECT2);
440 }
441 else
442 ACTION_ECHO;
443 }
444
445 .* ACTION_ECHO;
446 {NL} ++linenum; ACTION_ECHO;
447
448 <<EOF>> {
449 mark_prolog();
450 sectnum = 0;
451 yyterminate(); /* to stop the parser */
452 }
453}
454
455<SECT2>{
456 ^{OPTWS}{NL} ++linenum; /* allow blank lines in section 2 */
457
458 ^{OPTWS}"%{" {
459 indented_code = false;
460 doing_codeblock = true;
461 bracelevel = 1;
462 BEGIN(PERCENT_BRACE_ACTION);
463 }
464
465 ^{OPTWS}"<" BEGIN(SC); return '<';
466 ^{OPTWS}"^" return '^';
467 \" BEGIN(QUOTE); return '"';
468 "{"/[[:digit:]] {
469 BEGIN(NUM);
470 if ( lex_compat || posix_compat )
471 return BEGIN_REPEAT_POSIX;
472 else
473 return BEGIN_REPEAT_FLEX;
474 }
475 "$"/([[:blank:]]|{NL}) return '$';
476
477 {WS}"%{" {
478 bracelevel = 1;
479 BEGIN(PERCENT_BRACE_ACTION);
480
481 if ( in_rule )
482 {
483 doing_rule_action = true;
484 in_rule = false;
485 return '\n';
486 }
487 }
488 {WS}"|".*{NL} continued_action = true; ++linenum; return '\n';
489
490 ^{WS}"/*" {
491 yyless( yyleng - 2 ); /* put back '/', '*' */
492 bracelevel = 0;
493 continued_action = false;
494 BEGIN(ACTION);
495 }
496
497 ^{WS} /* allow indented rules */
498
499 {WS} {
500 /* This rule is separate from the one below because
501 * otherwise we get variable trailing context, so
502 * we can't build the scanner using -{f,F}.
503 */
504 bracelevel = 0;
505 continued_action = false;
506 BEGIN(ACTION);
507
508 if ( in_rule )
509 {
510 doing_rule_action = true;
511 in_rule = false;
512 return '\n';
513 }
514 }
515
516 {OPTWS}{NL} {
517 bracelevel = 0;
518 continued_action = false;
519 BEGIN(ACTION);
520 unput( '\n' ); /* so <ACTION> sees it */
521
522 if ( in_rule )
523 {
524 doing_rule_action = true;
525 in_rule = false;
526 return '\n';
527 }
528 }
529
530 ^{OPTWS}"<<EOF>>" |
531 "<<EOF>>" return EOF_OP;
532
533 ^"%%".* {
534 sectnum = 3;
535 BEGIN(SECT3);
536 outn("/* Begin user sect3 */");
537 yyterminate(); /* to stop the parser */
538 }
539
540 "["({FIRST_CCL_CHAR}|{CCL_EXPR})({CCL_CHAR}|{CCL_EXPR})* {
541 int cclval;
542
543 if(yyleng < MAXLINE)
544 {
545 strcpy( nmstr, yytext );
546 }
547 else
548 {
549 synerr( _("Input line too long\n"));
550 FLEX_EXIT(EXIT_FAILURE);
551 }
552
553 /* Check to see if we've already encountered this
554 * ccl.
555 */
556 if ( (cclval = ccllookup( (Char *) nmstr )) != 0 )
557 {
558 if ( input() != ']' )
559 synerr( _( "bad character class" ) );
560
561 yylval = cclval;
562 ++cclreuse;
563 return PREVCCL;
564 }
565 else
566 {
567 /* We fudge a bit. We know that this ccl will
568 * soon be numbered as lastccl + 1 by cclinit.
569 */
570 cclinstal( (Char *) nmstr, lastccl + 1 );
571
572 /* Push back everything but the leading bracket
573 * so the ccl can be rescanned.
574 */
575 yyless( 1 );
576
577 BEGIN(FIRSTCCL);
578 return '[';
579 }
580 }
581
582 /* Check for :space: at the end of the rule so we don't
583 * wrap the expanded regex in '(' ')' -- breaking trailing
584 * context.
585 */
586 "{"{NAME}"}"[[:space:]]? {
587 register Char *nmdefptr;
588 int end_is_ws, end_ch;
589
590 end_ch = yytext[yyleng-1];
591 end_is_ws = end_ch != '}' ? 1 : 0;
592
593 if(yyleng-1 < MAXLINE)
594 {
595 strcpy( nmstr, yytext + 1 );
596 }
597 else
598 {
599 synerr( _("Input line too long\n"));
600 FLEX_EXIT(EXIT_FAILURE);
601 }
602nmstr[yyleng - 2 - end_is_ws] = '\0'; /* chop trailing brace */
603
604 if ( (nmdefptr = ndlookup( nmstr )) == 0 )
605 format_synerr(
606 _( "undefined definition {%s}" ),
607 nmstr );
608
609 else
610 { /* push back name surrounded by ()'s */
611 int len = strlen( (char *) nmdefptr );
612 if (end_is_ws)
613 unput(end_ch);
614
615 if ( lex_compat || nmdefptr[0] == '^' ||
616 (len > 0 && nmdefptr[len - 1] == '$')
617 || (end_is_ws && trlcontxt))
618 { /* don't use ()'s after all */
619 PUT_BACK_STRING((char *) nmdefptr, 0);
620
621 if ( nmdefptr[0] == '^' )
622 BEGIN(CARETISBOL);
623 }
624
625 else
626 {
627 unput(')');
628 PUT_BACK_STRING((char *) nmdefptr, 0);
629 unput('(');
630 }
631 }
632 }
633
634 [/|*+?.(){}] return (unsigned char) yytext[0];
635 . RETURNCHAR;
636}
637
638
639<SC>{
640 {OPTWS}{NL}{OPTWS} ++linenum; /* Allow blank lines & continuations */
641 [,*] return (unsigned char) yytext[0];
642 ">" BEGIN(SECT2); return '>';
643 ">"/^ BEGIN(CARETISBOL); return '>';
644 {SCNAME} RETURNNAME;
645 . {
646 format_synerr( _( "bad <start condition>: %s" ),
647 yytext );
648 }
649}
650
651<CARETISBOL>"^" BEGIN(SECT2); return '^';
652
653
654<QUOTE>{
655 [^"\n] RETURNCHAR;
656 \" BEGIN(SECT2); return '"';
657
658 {NL} {
659 synerr( _( "missing quote" ) );
660 BEGIN(SECT2);
661 ++linenum;
662 return '"';
663 }
664}
665
666
667<FIRSTCCL>{
668 "^"/[^-\]\n] BEGIN(CCL); return '^';
669 "^"/("-"|"]") return '^';
670 . BEGIN(CCL); RETURNCHAR;
671}
672
673<CCL>{
674 -/[^\]\n] return '-';
675 [^\]\n] RETURNCHAR;
676 "]" BEGIN(SECT2); return ']';
677 .|{NL} {
678 synerr( _( "bad character class" ) );
679 BEGIN(SECT2);
680 return ']';
681 }
682}
683
684<FIRSTCCL,CCL>{
685 "[:alnum:]" BEGIN(CCL); return CCE_ALNUM;
686 "[:alpha:]" BEGIN(CCL); return CCE_ALPHA;
687 "[:blank:]" BEGIN(CCL); return CCE_BLANK;
688 "[:cntrl:]" BEGIN(CCL); return CCE_CNTRL;
689 "[:digit:]" BEGIN(CCL); return CCE_DIGIT;
690 "[:graph:]" BEGIN(CCL); return CCE_GRAPH;
691 "[:lower:]" BEGIN(CCL); return CCE_LOWER;
692 "[:print:]" BEGIN(CCL); return CCE_PRINT;
693 "[:punct:]" BEGIN(CCL); return CCE_PUNCT;
694 "[:space:]" BEGIN(CCL); return CCE_SPACE;
695 "[:upper:]" BEGIN(CCL); return CCE_UPPER;
696 "[:xdigit:]" BEGIN(CCL); return CCE_XDIGIT;
697 {CCL_EXPR} {
698 format_synerr(
699 _( "bad character class expression: %s" ),
700 yytext );
701 BEGIN(CCL); return CCE_ALNUM;
702 }
703}
704
705<NUM>{
706 [[:digit:]]+ {
707 yylval = myctoi( yytext );
708 return NUMBER;
709 }
710
711 "," return ',';
712 "}" {
713 BEGIN(SECT2);
714 if ( lex_compat || posix_compat )
715 return END_REPEAT_POSIX;
716 else
717 return END_REPEAT_FLEX;
718 }
719
720 . {
721 synerr( _( "bad character inside {}'s" ) );
722 BEGIN(SECT2);
723 return '}';
724 }
725
726 {NL} {
727 synerr( _( "missing }" ) );
728 BEGIN(SECT2);
729 ++linenum;
730 return '}';
731 }
732}
733
734
735<PERCENT_BRACE_ACTION>{
736 {OPTWS}"%}".* bracelevel = 0;
737
738 <ACTION>"/*" ACTION_ECHO; yy_push_state( COMMENT );
739
740 <CODEBLOCK,ACTION>{
741 "reject" {
742 ACTION_ECHO;
743 CHECK_REJECT(yytext);
744 }
745 "yymore" {
746 ACTION_ECHO;
747 CHECK_YYMORE(yytext);
748 }
749 }
750
751 {NAME}|{NOT_NAME}|. ACTION_ECHO;
752 {NL} {
753 ++linenum;
754 ACTION_ECHO;
755 if ( bracelevel == 0 ||
756 (doing_codeblock && indented_code) )
757 {
758 if ( doing_rule_action )
759 add_action( "\tYY_BREAK\n" );
760
761 doing_rule_action = doing_codeblock = false;
762 BEGIN(SECT2);
763 }
764 }
765}
766
767
768 /* Reject and YYmore() are checked for above, in PERCENT_BRACE_ACTION */
769<ACTION>{
770 "{" ACTION_ECHO; ++bracelevel;
771 "}" ACTION_ECHO; --bracelevel;
772 [^[:alpha:]_{}"'/\n]+ ACTION_ECHO;
773 {NAME} ACTION_ECHO;
774 "'"([^'\\\n]|\\.)*"'" ACTION_ECHO; /* character constant */
775 \" ACTION_ECHO; BEGIN(ACTION_STRING);
776 {NL} {
777 ++linenum;
778 ACTION_ECHO;
779 if ( bracelevel == 0 )
780 {
781 if ( doing_rule_action )
782 add_action( "\tYY_BREAK\n" );
783
784 doing_rule_action = false;
785 BEGIN(SECT2);
786 }
787 }
788 . ACTION_ECHO;
789}
790
791<ACTION_STRING>{
792 [^"\\\n]+ ACTION_ECHO;
793 \\. ACTION_ECHO;
794 {NL} ++linenum; ACTION_ECHO; BEGIN(ACTION);
795 \" ACTION_ECHO; BEGIN(ACTION);
796 . ACTION_ECHO;
797}
798
799<COMMENT,ACTION,ACTION_STRING><<EOF>> {
800 synerr( _( "EOF encountered inside an action" ) );
801 yyterminate();
802 }
803
804
805<SECT2,QUOTE,FIRSTCCL,CCL>{ESCSEQ} {
806 yylval = myesc( (Char *) yytext );
807
808 if ( YY_START == FIRSTCCL )
809 BEGIN(CCL);
810
811 return CHAR;
812 }
813
814
815<SECT3>{
816 .*(\n?) ECHO;
817 <<EOF>> sectnum = 0; yyterminate();
818}
819
820<*>.|\n format_synerr( _( "bad character: %s" ), yytext );
821
822%%
823
824
825int yywrap()
826 {
827 if ( --num_input_files > 0 )
828 {
829 set_input_file( *++input_files );
830 return 0;
831 }
832
833 else
834 return 1;
835 }
836
837
838/* set_input_file - open the given file (if NULL, stdin) for scanning */
839
840void set_input_file( file )
841char *file;
842 {
843 if ( file && strcmp( file, "-" ) )
844 {
845 infilename = copy_string( file );
846 yyin = fopen( infilename, "r" );
847
848 if ( yyin == NULL )
849 lerrsf( _( "can't open %s" ), file );
850 }
851
852 else
853 {
854 yyin = stdin;
855 infilename = copy_string( "<stdin>" );
856 }
857
858 linenum = 1;
859 }
860
861
862/* Wrapper routines for accessing the scanner's malloc routines. */
863
864void *flex_alloc( size )
865size_t size;
866 {
867 return (void *) malloc( size );
868 }
869
870void *flex_realloc( ptr, size )
871void *ptr;
872size_t size;
873 {
874 return (void *) realloc( ptr, size );
875 }
876
877void flex_free( ptr )
878void *ptr;
879 {
880 if ( ptr )
881 free( ptr );
882 }
Note: See TracBrowser for help on using the repository browser.