1 /* flex - tool to generate fast lexical analyzers */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
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.
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.
31 "@(#) Copyright (c) 1990 The Regents of the University of California.\n\
32 All rights reserved.\n";
35 /* $Header: /home/daffy/u0/vern/flex/RCS/main.c,v 2.64 96/05/25 20:42:42 vern Exp $ */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
43 static char flex_version[] = FLEX_VERSION;
46 /* declare functions that have forward references */
48 void flexinit PROTO((int, char**));
49 void readin PROTO((void));
50 void set_up_initial_allocations PROTO((void));
52 #ifdef NEED_ARGV_FIXUP
53 extern void argv_fixup PROTO((int *, char ***));
57 /* these globals are all defined and commented in flexdef.h */
58 int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt;
59 int interactive, caseins, lex_compat, do_yylineno, useecs, fulltbl, usemecs;
60 int fullspd, gen_line_dirs, performance_report, backing_up_report;
61 int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap, csize;
62 int yymore_used, reject, real_reject, continued_action, in_rule;
63 int yymore_really_used, reject_really_used;
64 int datapos, dataline, linenum, out_linenum;
65 FILE *skelfile = NULL;
68 int action_size, defs1_offset, prolog_offset, action_offset, action_index;
69 char *infilename = NULL, *outfilename = NULL;
71 char *prefix, *yyclass;
72 int do_stdinit, use_stdout;
73 int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE];
74 int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp;
75 int current_mns, current_max_rules;
76 int num_rules, num_eof_rules, default_rule, lastnfa;
77 int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2;
78 int *accptnum, *assoc_rule, *state_type;
79 int *rule_type, *rule_linenum, *rule_useful;
80 int current_state_type;
81 int variable_trailing_context_rules;
82 int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP];
83 int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE];
84 int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1];
85 int tecbck[CSIZE + 1];
86 int lastsc, *scset, *scbol, *scxclu, *sceof;
89 int current_max_dfa_size, current_max_xpairs;
90 int current_max_template_xpairs, current_max_dfas;
91 int lastdfa, *nxt, *chk, *tnxt;
92 int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz;
93 union dfaacc_union *dfaacc;
94 int *accsiz, *dhash, numas;
95 int numsnpairs, jambase, jamstate;
96 int lastccl, *cclmap, *ccllen, *cclng, cclreuse;
97 int current_maxccls, current_max_ccl_tbl_size;
100 int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs;
101 int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave;
102 int num_backing_up, bol_needed;
103 FILE *backing_up_file;
104 int end_of_buffer_state;
108 /* Make sure program_name is initialized so we don't crash if writing
109 * out an error message before getting the program name from argv[0].
111 char *program_name = "flex";
113 #ifndef SHORT_FILE_NAMES
114 static char *outfile_template = "lex.%s.%s";
115 static char *backing_name = "lex.backup";
117 static char *outfile_template = "lex%s.%s";
118 static char *backing_name = "lex.bck";
126 extern unsigned _stklen = 16384;
129 static char outfile_path[MAXLINE];
130 static int outfile_created = 0;
131 static char *skelname = NULL;
134 int main( argc, argv )
141 argc = ccommand( &argv );
143 #ifdef NEED_ARGV_FIXUP
144 argv_fixup( &argc, &argv );
147 flexinit( argc, argv );
153 for ( i = 1; i <= num_rules; ++i )
154 if ( ! rule_useful[i] && i != default_rule )
155 line_warning( _( "rule cannot be matched" ),
158 if ( spprdflt && ! reject && rule_useful[default_rule] )
160 _( "-s option given but default rule can be matched" ),
161 rule_linenum[default_rule] );
163 /* Generate the C state transition tables from the DFA. */
166 /* Note, flexend does not return. It exits with its argument
171 return 0; /* keep compilers/lint happy */
175 /* check_options - check user-specified options */
184 flexerror( _( "Can't use -+ with -l option" ) );
186 if ( fulltbl || fullspd )
187 flexerror( _( "Can't use -f or -F with -l option" ) );
189 /* Don't rely on detecting use of yymore() and REJECT,
190 * just assume they'll be used.
192 yymore_really_used = reject_really_used = true;
194 yytext_is_array = true;
200 /* This should really be "maintain_backup_tables = true" */
201 reject_really_used = true;
203 if ( csize == unspecified )
205 if ( (fulltbl || fullspd) && ! useecs )
206 csize = DEFAULT_CSIZE;
211 if ( interactive == unspecified )
213 if ( fulltbl || fullspd )
219 if ( fulltbl || fullspd )
223 _( "-Cf/-CF and -Cm don't make sense together" ) );
226 flexerror( _( "-Cf/-CF and -I are incompatible" ) );
230 _( "-Cf/-CF are incompatible with lex-compatibility mode" ) );
234 _( "-Cf/-CF and %option yylineno are incompatible" ) );
236 if ( fulltbl && fullspd )
237 flexerror( _( "-Cf and -CF are mutually exclusive" ) );
240 if ( C_plus_plus && fullspd )
241 flexerror( _( "Can't use -+ with -CF option" ) );
243 if ( C_plus_plus && yytext_is_array )
245 warn( _( "%array incompatible with -+ option" ) );
246 yytext_is_array = false;
250 { /* Set up doubly-linked equivalence classes. */
252 /* We loop all the way up to csize, since ecgroup[csize] is
253 * the position used for NUL characters.
257 for ( i = 2; i <= csize; ++i )
263 nextecm[csize] = NIL;
268 /* Put everything in its own equivalence class. */
269 for ( i = 1; i <= csize; ++i )
272 nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */
280 if ( ! did_outfilename )
289 sprintf( outfile_path, outfile_template,
292 outfilename = outfile_path;
295 prev_stdout = freopen( outfilename, "w", stdout );
297 if ( prev_stdout == NULL )
298 lerrsf( _( "could not create %s" ), outfilename );
303 if ( skelname && (skelfile = fopen( skelname, "r" )) == NULL )
304 lerrsf( _( "can't open skeleton file %s" ), skelname );
306 if ( strcmp( prefix, "yy" ) )
308 #define GEN_PREFIX(name) out_str3( "#define yy%s %s%s\n", name, prefix, name )
310 GEN_PREFIX( "FlexLexer" );
313 GEN_PREFIX( "_create_buffer" );
314 GEN_PREFIX( "_delete_buffer" );
315 GEN_PREFIX( "_scan_buffer" );
316 GEN_PREFIX( "_scan_string" );
317 GEN_PREFIX( "_scan_bytes" );
318 GEN_PREFIX( "_flex_debug" );
319 GEN_PREFIX( "_init_buffer" );
320 GEN_PREFIX( "_flush_buffer" );
321 GEN_PREFIX( "_load_buffer_state" );
322 GEN_PREFIX( "_switch_to_buffer" );
324 GEN_PREFIX( "leng" );
327 GEN_PREFIX( "restart" );
328 GEN_PREFIX( "text" );
331 GEN_PREFIX( "lineno" );
335 GEN_PREFIX( "wrap" );
340 if ( did_outfilename )
341 line_directive_out( stdout, 0 );
347 /* flexend - terminate flex
350 * This routine does not return.
353 void flexend( exit_status )
360 if ( skelfile != NULL )
362 if ( ferror( skelfile ) )
363 lerrsf( _( "input error reading skeleton file %s" ),
366 else if ( fclose( skelfile ) )
367 lerrsf( _( "error closing skeleton file %s" ),
371 if ( exit_status != 0 && outfile_created )
373 if ( ferror( stdout ) )
374 lerrsf( _( "error writing output file %s" ),
377 else if ( fclose( stdout ) )
378 lerrsf( _( "error closing output file %s" ),
381 else if ( unlink( outfilename ) )
382 lerrsf( _( "error deleting output file %s" ),
386 if ( backing_up_report && backing_up_file )
388 if ( num_backing_up == 0 )
389 fprintf( backing_up_file, _( "No backing up.\n" ) );
390 else if ( fullspd || fulltbl )
391 fprintf( backing_up_file,
392 _( "%d backing up (non-accepting) states.\n" ),
395 fprintf( backing_up_file,
396 _( "Compressed tables always back up.\n" ) );
398 if ( ferror( backing_up_file ) )
399 lerrsf( _( "error writing backup file %s" ),
402 else if ( fclose( backing_up_file ) )
403 lerrsf( _( "error closing backup file %s" ),
409 fprintf( stderr, _( "%s version %s usage statistics:\n" ),
410 program_name, flex_version );
412 fprintf( stderr, _( " scanner options: -" ) );
416 if ( backing_up_report )
424 if ( performance_report > 0 )
426 if ( performance_report > 1 )
433 putc( 'v', stderr ); /* always true! */
436 if ( interactive == false )
438 if ( interactive == true )
440 if ( ! gen_line_dirs )
445 if ( csize == unspecified )
446 /* We encountered an error fairly early on, so csize
447 * never got specified. Define it now, to prevent
448 * bogus table sizes being written out below.
457 fprintf( stderr, " -C" );
472 if ( did_outfilename )
473 fprintf( stderr, " -o%s", outfilename );
476 fprintf( stderr, " -S%s", skelname );
478 if ( strcmp( prefix, "yy" ) )
479 fprintf( stderr, " -P%s", prefix );
481 putc( '\n', stderr );
483 fprintf( stderr, _( " %d/%d NFA states\n" ),
484 lastnfa, current_mns );
485 fprintf( stderr, _( " %d/%d DFA states (%d words)\n" ),
486 lastdfa, current_max_dfas, totnst );
487 fprintf( stderr, _( " %d rules\n" ),
488 num_rules + num_eof_rules - 1 /* - 1 for def. rule */ );
490 if ( num_backing_up == 0 )
491 fprintf( stderr, _( " No backing up\n" ) );
492 else if ( fullspd || fulltbl )
494 _( " %d backing-up (non-accepting) states\n" ),
498 _( " Compressed tables always back-up\n" ) );
502 _( " Beginning-of-line patterns used\n" ) );
504 fprintf( stderr, _( " %d/%d start conditions\n" ), lastsc,
507 _( " %d epsilon states, %d double epsilon states\n" ),
511 fprintf( stderr, _( " no character classes\n" ) );
514 _( " %d/%d character classes needed %d/%d words of storage, %d reused\n" ),
515 lastccl, current_maxccls,
516 cclmap[lastccl] + ccllen[lastccl],
517 current_max_ccl_tbl_size, cclreuse );
519 fprintf( stderr, _( " %d state/nextstate pairs created\n" ),
521 fprintf( stderr, _( " %d/%d unique/duplicate transitions\n" ),
526 tblsiz = lastdfa * numecs;
527 fprintf( stderr, _( " %d table entries\n" ), tblsiz );
532 tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend;
535 _( " %d/%d base-def entries created\n" ),
536 lastdfa + numtemps, current_max_dfas );
538 _( " %d/%d (peak %d) nxt-chk entries created\n" ),
539 tblend, current_max_xpairs, peakpairs );
541 _( " %d/%d (peak %d) template nxt-chk entries created\n" ),
543 current_max_template_xpairs,
545 fprintf( stderr, _( " %d empty table entries\n" ),
547 fprintf( stderr, _( " %d protos created\n" ),
550 _( " %d templates created, %d uses\n" ),
556 tblsiz = tblsiz + csize;
558 _( " %d/%d equivalence classes created\n" ),
564 tblsiz = tblsiz + numecs;
566 _( " %d/%d meta-equivalence classes created\n" ),
571 _( " %d (%d saved) hash collisions, %d DFAs equal\n" ),
572 hshcol, hshsave, dfaeql );
573 fprintf( stderr, _( " %d sets of reallocations needed\n" ),
575 fprintf( stderr, _( " %d total table entries needed\n" ),
583 /* flexinit - initialize flex */
585 void flexinit( argc, argv )
592 printstats = syntaxerror = trace = spprdflt = caseins = false;
593 lex_compat = C_plus_plus = backing_up_report = ddebug = fulltbl = false;
594 fullspd = long_align = nowarn = yymore_used = continued_action = false;
595 do_yylineno = yytext_is_array = in_rule = reject = do_stdinit = false;
596 yymore_really_used = reject_really_used = unspecified;
597 interactive = csize = unspecified;
598 do_yywrap = gen_line_dirs = usemecs = useecs = true;
599 performance_report = 0;
603 use_read = use_stdout = false;
607 /* Initialize dynamic array for holding the rule actions. */
608 action_size = 2048; /* default size of action array in bytes */
609 action_array = allocate_character_array( action_size );
610 defs1_offset = prolog_offset = action_offset = action_index = 0;
611 action_array[0] = '\0';
613 program_name = argv[0];
615 if ( program_name[0] != '\0' &&
616 program_name[strlen( program_name ) - 1] == '+' )
620 for ( --argc, ++argv; argc ; --argc, ++argv )
624 if ( arg[0] != '-' || arg[1] == '\0' )
629 if ( ! strcmp( arg, "--help" ) )
632 else if ( ! strcmp( arg, "--version" ) )
635 else if ( ! strcmp( arg, "--" ) )
636 { /* end of options */
643 for ( i = 1; arg[i] != '\0'; ++i )
655 backing_up_report = true;
664 _( "-C flag must be given separately" ) );
674 for ( ++i; arg[i] != '\0'; ++i )
704 _( "unknown -C option '%c'" ),
716 useecs = usemecs = false;
717 use_read = fulltbl = true;
721 useecs = usemecs = false;
722 use_read = fullspd = true;
743 gen_line_dirs = false;
747 /* Stupid do-nothing deprecated
755 _( "-o flag must be given separately" ) );
757 outfilename = arg + i + 1;
764 _( "-P flag must be given separately" ) );
766 prefix = arg + i + 1;
770 ++performance_report;
776 _( "-S flag must be given separately" ) );
778 skelname = arg + i + 1;
798 printf( _( "%s version %s\n" ),
799 program_name, flex_version );
816 _( "%s: unknown flag '%c'. For usage, try\n\t%s --help\n" ),
817 program_name, (int) arg[i],
822 /* Used by -C, -S, -o, and -P flags in lieu of a "continue 2"
828 num_input_files = argc;
830 set_input_file( num_input_files > 0 ? input_files[0] : NULL );
832 lastccl = lastsc = lastdfa = lastnfa = 0;
833 num_rules = num_eof_rules = default_rule = 0;
834 numas = numsnpairs = tmpuses = 0;
835 numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 0;
836 numuniq = numdup = hshsave = eofseen = datapos = dataline = 0;
837 num_backing_up = onesp = numprots = 0;
838 variable_trailing_context_rules = bol_needed = false;
840 out_linenum = linenum = sectnum = 1;
843 /* Used in mkprot() so that the first proto goes in slot 1
844 * of the proto queue.
848 set_up_initial_allocations();
852 /* readin - read in the rules section of the input file(s) */
856 static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;";
857 static char yy_nostdinit[] =
858 "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;";
860 line_directive_out( (FILE *) 0, 1 );
864 pinpoint_message( _( "fatal parse error" ) );
871 if ( backing_up_report )
873 backing_up_file = fopen( backing_name, "w" );
874 if ( backing_up_file == NULL )
876 _( "could not create backing-up info file %s" ),
881 backing_up_file = NULL;
883 if ( yymore_really_used == true )
885 else if ( yymore_really_used == false )
888 if ( reject_really_used == true )
890 else if ( reject_really_used == false )
893 if ( performance_report > 0 )
898 _( "-l AT&T lex compatibility option entails a large performance penalty\n" ) );
900 _( " and may be the actual source of other reported performance penalties\n" ) );
903 else if ( do_yylineno )
906 _( "%%option yylineno entails a large performance penalty\n" ) );
909 if ( performance_report > 1 )
913 _( "-I (interactive) entails a minor performance penalty\n" ) );
917 _( "yymore() entails a minor performance penalty\n" ) );
922 _( "REJECT entails a large performance penalty\n" ) );
924 if ( variable_trailing_context_rules )
926 _( "Variable trailing context rules entail a large performance penalty\n" ) );
932 if ( variable_trailing_context_rules )
935 if ( (fulltbl || fullspd) && reject )
939 _( "REJECT cannot be used with -f or -F" ) );
940 else if ( do_yylineno )
942 _( "%option yylineno cannot be used with -f or -F" ) );
945 _( "variable trailing context rules cannot be used with -f or -F" ) );
949 outn( "\n#define YY_USES_REJECT" );
953 outn( "\n#define yywrap() 1" );
954 outn( "#define YY_SKIP_YYWRAP" );
958 outn( "\n#define FLEX_DEBUG" );
961 outn( "typedef unsigned char YY_CHAR;" );
963 outn( "typedef char YY_CHAR;" );
967 outn( "#define yytext_ptr yytext" );
970 outn( "#define YY_INTERACTIVE" );
977 outn( "#ifdef VMS" );
978 outn( "#ifndef __VMS_POSIX" );
979 outn( yy_nostdinit );
989 outn( yy_nostdinit );
993 outn( "typedef yyconst struct yy_trans_info *yy_state_type;" );
994 else if ( ! C_plus_plus )
995 outn( "typedef int yy_state_type;" );
998 outn( "\n#define FLEX_DEBUG" );
1001 outn( "#define YY_FLEX_LEX_COMPAT" );
1003 if ( do_yylineno && ! C_plus_plus )
1005 outn( "extern int yylineno;" );
1006 outn( "int yylineno = 1;" );
1011 outn( "\n#include <FlexLexer.h>" );
1015 outn( "int yyFlexLexer::yylex()" );
1018 "\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );" );
1019 outn( "\treturn 0;" );
1022 out_str( "\n#define YY_DECL int %s::yylex()\n",
1029 if ( yytext_is_array )
1030 outn( "extern char yytext[];\n" );
1034 outn( "extern char *yytext;" );
1035 outn( "#define yytext_ptr yytext" );
1040 _( "%option yyclass only meaningful for C++ scanners" ) );
1044 numecs = cre8ecs( nextecm, ecgroup, csize );
1048 /* Now map the equivalence class for NUL to its expected place. */
1049 ecgroup[0] = ecgroup[csize];
1050 NUL_ec = ABS( ecgroup[0] );
1057 /* set_up_initial_allocations - allocate memory for internal tables */
1059 void set_up_initial_allocations()
1061 current_mns = INITIAL_MNS;
1062 firstst = allocate_integer_array( current_mns );
1063 lastst = allocate_integer_array( current_mns );
1064 finalst = allocate_integer_array( current_mns );
1065 transchar = allocate_integer_array( current_mns );
1066 trans1 = allocate_integer_array( current_mns );
1067 trans2 = allocate_integer_array( current_mns );
1068 accptnum = allocate_integer_array( current_mns );
1069 assoc_rule = allocate_integer_array( current_mns );
1070 state_type = allocate_integer_array( current_mns );
1072 current_max_rules = INITIAL_MAX_RULES;
1073 rule_type = allocate_integer_array( current_max_rules );
1074 rule_linenum = allocate_integer_array( current_max_rules );
1075 rule_useful = allocate_integer_array( current_max_rules );
1077 current_max_scs = INITIAL_MAX_SCS;
1078 scset = allocate_integer_array( current_max_scs );
1079 scbol = allocate_integer_array( current_max_scs );
1080 scxclu = allocate_integer_array( current_max_scs );
1081 sceof = allocate_integer_array( current_max_scs );
1082 scname = allocate_char_ptr_array( current_max_scs );
1084 current_maxccls = INITIAL_MAX_CCLS;
1085 cclmap = allocate_integer_array( current_maxccls );
1086 ccllen = allocate_integer_array( current_maxccls );
1087 cclng = allocate_integer_array( current_maxccls );
1089 current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE;
1090 ccltbl = allocate_Character_array( current_max_ccl_tbl_size );
1092 current_max_dfa_size = INITIAL_MAX_DFA_SIZE;
1094 current_max_xpairs = INITIAL_MAX_XPAIRS;
1095 nxt = allocate_integer_array( current_max_xpairs );
1096 chk = allocate_integer_array( current_max_xpairs );
1098 current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS;
1099 tnxt = allocate_integer_array( current_max_template_xpairs );
1101 current_max_dfas = INITIAL_MAX_DFAS;
1102 base = allocate_integer_array( current_max_dfas );
1103 def = allocate_integer_array( current_max_dfas );
1104 dfasiz = allocate_integer_array( current_max_dfas );
1105 accsiz = allocate_integer_array( current_max_dfas );
1106 dhash = allocate_integer_array( current_max_dfas );
1107 dss = allocate_int_ptr_array( current_max_dfas );
1108 dfaacc = allocate_dfaacc_union( current_max_dfas );
1110 nultrans = (int *) 0;
1119 _( "%s [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton]\n" ),
1121 fprintf( f, _( "\t[--help --version] [file ...]\n" ) );
1123 fprintf( f, _( "\t-b generate backing-up information to %s\n" ),
1125 fprintf( f, _( "\t-c do-nothing POSIX option\n" ) );
1126 fprintf( f, _( "\t-d turn on debug mode in generated scanner\n" ) );
1127 fprintf( f, _( "\t-f generate fast, large scanner\n" ) );
1128 fprintf( f, _( "\t-h produce this help message\n" ) );
1129 fprintf( f, _( "\t-i generate case-insensitive scanner\n" ) );
1130 fprintf( f, _( "\t-l maximal compatibility with original lex\n" ) );
1131 fprintf( f, _( "\t-n do-nothing POSIX option\n" ) );
1132 fprintf( f, _( "\t-p generate performance report to stderr\n" ) );
1134 _( "\t-s suppress default rule to ECHO unmatched text\n" ) );
1136 if ( ! did_outfilename )
1138 sprintf( outfile_path, outfile_template,
1139 prefix, C_plus_plus ? "cc" : "c" );
1140 outfilename = outfile_path;
1144 _( "\t-t write generated scanner on stdout instead of %s\n" ),
1148 _( "\t-v write summary of scanner statistics to f\n" ) );
1149 fprintf( f, _( "\t-w do not generate warnings\n" ) );
1150 fprintf( f, _( "\t-B generate batch scanner (opposite of -I)\n" ) );
1152 _( "\t-F use alternative fast scanner representation\n" ) );
1154 _( "\t-I generate interactive scanner (opposite of -B)\n" ) );
1155 fprintf( f, _( "\t-L suppress #line directives in scanner\n" ) );
1156 fprintf( f, _( "\t-T %s should run in trace mode\n" ), program_name );
1157 fprintf( f, _( "\t-V report %s version\n" ), program_name );
1158 fprintf( f, _( "\t-7 generate 7-bit scanner\n" ) );
1159 fprintf( f, _( "\t-8 generate 8-bit scanner\n" ) );
1160 fprintf( f, _( "\t-+ generate C++ scanner class\n" ) );
1161 fprintf( f, _( "\t-? produce this help message\n" ) );
1163 _( "\t-C specify degree of table compression (default is -Cem):\n" ) );
1165 _( "\t\t-Ca trade off larger tables for better memory alignment\n" ) );
1166 fprintf( f, _( "\t\t-Ce construct equivalence classes\n" ) );
1168 _( "\t\t-Cf do not compress scanner tables; use -f representation\n" ) );
1170 _( "\t\t-CF do not compress scanner tables; use -F representation\n" ) );
1171 fprintf( f, _( "\t\t-Cm construct meta-equivalence classes\n" ) );
1173 _( "\t\t-Cr use read() instead of stdio for scanner input\n" ) );
1174 fprintf( f, _( "\t-o specify output filename\n" ) );
1175 fprintf( f, _( "\t-P specify scanner prefix other than \"yy\"\n" ) );
1176 fprintf( f, _( "\t-S specify skeleton file\n" ) );
1177 fprintf( f, _( "\t--help produce this help message\n" ) );
1178 fprintf( f, _( "\t--version report %s version\n" ), program_name );