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 $ */
42 static char flex_version[] = FLEX_VERSION;
45 /* declare functions that have forward references */
47 void flexinit PROTO((int, char**));
48 void readin PROTO((void));
49 void set_up_initial_allocations PROTO((void));
51 #ifdef NEED_ARGV_FIXUP
52 extern void argv_fixup PROTO((int *, char ***));
56 /* these globals are all defined and commented in flexdef.h */
57 int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt;
58 int interactive, caseins, lex_compat, do_yylineno, useecs, fulltbl, usemecs;
59 int fullspd, gen_line_dirs, performance_report, backing_up_report;
60 int C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap, csize;
61 int yymore_used, reject, real_reject, continued_action, in_rule;
62 int yymore_really_used, reject_really_used;
63 int datapos, dataline, linenum, out_linenum;
64 FILE *skelfile = NULL;
67 int action_size, defs1_offset, prolog_offset, action_offset, action_index;
68 char *infilename = NULL, *outfilename = NULL;
70 char *prefix, *yyclass;
71 int do_stdinit, use_stdout;
72 int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE];
73 int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp;
74 int current_mns, current_max_rules;
75 int num_rules, num_eof_rules, default_rule, lastnfa;
76 int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2;
77 int *accptnum, *assoc_rule, *state_type;
78 int *rule_type, *rule_linenum, *rule_useful;
79 int current_state_type;
80 int variable_trailing_context_rules;
81 int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP];
82 int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE];
83 int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1];
84 int tecbck[CSIZE + 1];
85 int lastsc, *scset, *scbol, *scxclu, *sceof;
88 int current_max_dfa_size, current_max_xpairs;
89 int current_max_template_xpairs, current_max_dfas;
90 int lastdfa, *nxt, *chk, *tnxt;
91 int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz;
92 union dfaacc_union *dfaacc;
93 int *accsiz, *dhash, numas;
94 int numsnpairs, jambase, jamstate;
95 int lastccl, *cclmap, *ccllen, *cclng, cclreuse;
96 int current_maxccls, current_max_ccl_tbl_size;
99 int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs;
100 int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave;
101 int num_backing_up, bol_needed;
102 FILE *backing_up_file;
103 int end_of_buffer_state;
107 /* Make sure program_name is initialized so we don't crash if writing
108 * out an error message before getting the program name from argv[0].
110 char *program_name = "flex";
112 #ifndef SHORT_FILE_NAMES
113 static char *outfile_template = "lex.%s.%s";
114 static char *backing_name = "lex.backup";
116 static char *outfile_template = "lex%s.%s";
117 static char *backing_name = "lex.bck";
125 extern unsigned _stklen = 16384;
128 static char outfile_path[MAXLINE];
129 static int outfile_created = 0;
130 static char *skelname = NULL;
133 int main( argc, argv )
140 argc = ccommand( &argv );
142 #ifdef NEED_ARGV_FIXUP
143 argv_fixup( &argc, &argv );
146 flexinit( argc, argv );
152 for ( i = 1; i <= num_rules; ++i )
153 if ( ! rule_useful[i] && i != default_rule )
154 line_warning( _( "rule cannot be matched" ),
157 if ( spprdflt && ! reject && rule_useful[default_rule] )
159 _( "-s option given but default rule can be matched" ),
160 rule_linenum[default_rule] );
162 /* Generate the C state transition tables from the DFA. */
165 /* Note, flexend does not return. It exits with its argument
170 return 0; /* keep compilers/lint happy */
174 /* check_options - check user-specified options */
183 flexerror( _( "Can't use -+ with -l option" ) );
185 if ( fulltbl || fullspd )
186 flexerror( _( "Can't use -f or -F with -l option" ) );
188 /* Don't rely on detecting use of yymore() and REJECT,
189 * just assume they'll be used.
191 yymore_really_used = reject_really_used = true;
193 yytext_is_array = true;
199 /* This should really be "maintain_backup_tables = true" */
200 reject_really_used = true;
202 if ( csize == unspecified )
204 if ( (fulltbl || fullspd) && ! useecs )
205 csize = DEFAULT_CSIZE;
210 if ( interactive == unspecified )
212 if ( fulltbl || fullspd )
218 if ( fulltbl || fullspd )
222 _( "-Cf/-CF and -Cm don't make sense together" ) );
225 flexerror( _( "-Cf/-CF and -I are incompatible" ) );
229 _( "-Cf/-CF are incompatible with lex-compatibility mode" ) );
233 _( "-Cf/-CF and %option yylineno are incompatible" ) );
235 if ( fulltbl && fullspd )
236 flexerror( _( "-Cf and -CF are mutually exclusive" ) );
239 if ( C_plus_plus && fullspd )
240 flexerror( _( "Can't use -+ with -CF option" ) );
242 if ( C_plus_plus && yytext_is_array )
244 warn( _( "%array incompatible with -+ option" ) );
245 yytext_is_array = false;
249 { /* Set up doubly-linked equivalence classes. */
251 /* We loop all the way up to csize, since ecgroup[csize] is
252 * the position used for NUL characters.
256 for ( i = 2; i <= csize; ++i )
262 nextecm[csize] = NIL;
267 /* Put everything in its own equivalence class. */
268 for ( i = 1; i <= csize; ++i )
271 nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */
279 if ( ! did_outfilename )
288 sprintf( outfile_path, outfile_template,
291 outfilename = outfile_path;
294 prev_stdout = freopen( outfilename, "w", stdout );
296 if ( prev_stdout == NULL )
297 lerrsf( _( "could not create %s" ), outfilename );
302 if ( skelname && (skelfile = fopen( skelname, "r" )) == NULL )
303 lerrsf( _( "can't open skeleton file %s" ), skelname );
305 if ( strcmp( prefix, "yy" ) )
307 #define GEN_PREFIX(name) out_str3( "#define yy%s %s%s\n", name, prefix, name )
309 GEN_PREFIX( "FlexLexer" );
312 GEN_PREFIX( "_create_buffer" );
313 GEN_PREFIX( "_delete_buffer" );
314 GEN_PREFIX( "_scan_buffer" );
315 GEN_PREFIX( "_scan_string" );
316 GEN_PREFIX( "_scan_bytes" );
317 GEN_PREFIX( "_flex_debug" );
318 GEN_PREFIX( "_init_buffer" );
319 GEN_PREFIX( "_flush_buffer" );
320 GEN_PREFIX( "_load_buffer_state" );
321 GEN_PREFIX( "_switch_to_buffer" );
323 GEN_PREFIX( "leng" );
326 GEN_PREFIX( "restart" );
327 GEN_PREFIX( "text" );
330 GEN_PREFIX( "lineno" );
334 GEN_PREFIX( "wrap" );
339 if ( did_outfilename )
340 line_directive_out( stdout, 0 );
346 /* flexend - terminate flex
349 * This routine does not return.
352 void flexend( exit_status )
359 if ( skelfile != NULL )
361 if ( ferror( skelfile ) )
362 lerrsf( _( "input error reading skeleton file %s" ),
365 else if ( fclose( skelfile ) )
366 lerrsf( _( "error closing skeleton file %s" ),
370 if ( exit_status != 0 && outfile_created )
372 if ( ferror( stdout ) )
373 lerrsf( _( "error writing output file %s" ),
376 else if ( fclose( stdout ) )
377 lerrsf( _( "error closing output file %s" ),
380 else if ( unlink( outfilename ) )
381 lerrsf( _( "error deleting output file %s" ),
385 if ( backing_up_report && backing_up_file )
387 if ( num_backing_up == 0 )
388 fprintf( backing_up_file, _( "No backing up.\n" ) );
389 else if ( fullspd || fulltbl )
390 fprintf( backing_up_file,
391 _( "%d backing up (non-accepting) states.\n" ),
394 fprintf( backing_up_file,
395 _( "Compressed tables always back up.\n" ) );
397 if ( ferror( backing_up_file ) )
398 lerrsf( _( "error writing backup file %s" ),
401 else if ( fclose( backing_up_file ) )
402 lerrsf( _( "error closing backup file %s" ),
408 fprintf( stderr, _( "%s version %s usage statistics:\n" ),
409 program_name, flex_version );
411 fprintf( stderr, _( " scanner options: -" ) );
415 if ( backing_up_report )
423 if ( performance_report > 0 )
425 if ( performance_report > 1 )
432 putc( 'v', stderr ); /* always true! */
435 if ( interactive == false )
437 if ( interactive == true )
439 if ( ! gen_line_dirs )
444 if ( csize == unspecified )
445 /* We encountered an error fairly early on, so csize
446 * never got specified. Define it now, to prevent
447 * bogus table sizes being written out below.
456 fprintf( stderr, " -C" );
471 if ( did_outfilename )
472 fprintf( stderr, " -o%s", outfilename );
475 fprintf( stderr, " -S%s", skelname );
477 if ( strcmp( prefix, "yy" ) )
478 fprintf( stderr, " -P%s", prefix );
480 putc( '\n', stderr );
482 fprintf( stderr, _( " %d/%d NFA states\n" ),
483 lastnfa, current_mns );
484 fprintf( stderr, _( " %d/%d DFA states (%d words)\n" ),
485 lastdfa, current_max_dfas, totnst );
486 fprintf( stderr, _( " %d rules\n" ),
487 num_rules + num_eof_rules - 1 /* - 1 for def. rule */ );
489 if ( num_backing_up == 0 )
490 fprintf( stderr, _( " No backing up\n" ) );
491 else if ( fullspd || fulltbl )
493 _( " %d backing-up (non-accepting) states\n" ),
497 _( " Compressed tables always back-up\n" ) );
501 _( " Beginning-of-line patterns used\n" ) );
503 fprintf( stderr, _( " %d/%d start conditions\n" ), lastsc,
506 _( " %d epsilon states, %d double epsilon states\n" ),
510 fprintf( stderr, _( " no character classes\n" ) );
513 _( " %d/%d character classes needed %d/%d words of storage, %d reused\n" ),
514 lastccl, current_maxccls,
515 cclmap[lastccl] + ccllen[lastccl],
516 current_max_ccl_tbl_size, cclreuse );
518 fprintf( stderr, _( " %d state/nextstate pairs created\n" ),
520 fprintf( stderr, _( " %d/%d unique/duplicate transitions\n" ),
525 tblsiz = lastdfa * numecs;
526 fprintf( stderr, _( " %d table entries\n" ), tblsiz );
531 tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend;
534 _( " %d/%d base-def entries created\n" ),
535 lastdfa + numtemps, current_max_dfas );
537 _( " %d/%d (peak %d) nxt-chk entries created\n" ),
538 tblend, current_max_xpairs, peakpairs );
540 _( " %d/%d (peak %d) template nxt-chk entries created\n" ),
542 current_max_template_xpairs,
544 fprintf( stderr, _( " %d empty table entries\n" ),
546 fprintf( stderr, _( " %d protos created\n" ),
549 _( " %d templates created, %d uses\n" ),
555 tblsiz = tblsiz + csize;
557 _( " %d/%d equivalence classes created\n" ),
563 tblsiz = tblsiz + numecs;
565 _( " %d/%d meta-equivalence classes created\n" ),
570 _( " %d (%d saved) hash collisions, %d DFAs equal\n" ),
571 hshcol, hshsave, dfaeql );
572 fprintf( stderr, _( " %d sets of reallocations needed\n" ),
574 fprintf( stderr, _( " %d total table entries needed\n" ),
582 /* flexinit - initialize flex */
584 void flexinit( argc, argv )
591 printstats = syntaxerror = trace = spprdflt = caseins = false;
592 lex_compat = C_plus_plus = backing_up_report = ddebug = fulltbl = false;
593 fullspd = long_align = nowarn = yymore_used = continued_action = false;
594 do_yylineno = yytext_is_array = in_rule = reject = do_stdinit = false;
595 yymore_really_used = reject_really_used = unspecified;
596 interactive = csize = unspecified;
597 do_yywrap = gen_line_dirs = usemecs = useecs = true;
598 performance_report = 0;
602 use_read = use_stdout = false;
606 /* Initialize dynamic array for holding the rule actions. */
607 action_size = 2048; /* default size of action array in bytes */
608 action_array = allocate_character_array( action_size );
609 defs1_offset = prolog_offset = action_offset = action_index = 0;
610 action_array[0] = '\0';
612 program_name = argv[0];
614 if ( program_name[0] != '\0' &&
615 program_name[strlen( program_name ) - 1] == '+' )
619 for ( --argc, ++argv; argc ; --argc, ++argv )
623 if ( arg[0] != '-' || arg[1] == '\0' )
628 if ( ! strcmp( arg, "--help" ) )
631 else if ( ! strcmp( arg, "--version" ) )
634 else if ( ! strcmp( arg, "--" ) )
635 { /* end of options */
642 for ( i = 1; arg[i] != '\0'; ++i )
654 backing_up_report = true;
663 _( "-C flag must be given separately" ) );
673 for ( ++i; arg[i] != '\0'; ++i )
703 _( "unknown -C option '%c'" ),
715 useecs = usemecs = false;
716 use_read = fulltbl = true;
720 useecs = usemecs = false;
721 use_read = fullspd = true;
742 gen_line_dirs = false;
746 /* Stupid do-nothing deprecated
754 _( "-o flag must be given separately" ) );
756 outfilename = arg + i + 1;
763 _( "-P flag must be given separately" ) );
765 prefix = arg + i + 1;
769 ++performance_report;
775 _( "-S flag must be given separately" ) );
777 skelname = arg + i + 1;
797 printf( _( "%s version %s\n" ),
798 program_name, flex_version );
815 _( "%s: unknown flag '%c'. For usage, try\n\t%s --help\n" ),
816 program_name, (int) arg[i],
821 /* Used by -C, -S, -o, and -P flags in lieu of a "continue 2"
827 num_input_files = argc;
829 set_input_file( num_input_files > 0 ? input_files[0] : NULL );
831 lastccl = lastsc = lastdfa = lastnfa = 0;
832 num_rules = num_eof_rules = default_rule = 0;
833 numas = numsnpairs = tmpuses = 0;
834 numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 0;
835 numuniq = numdup = hshsave = eofseen = datapos = dataline = 0;
836 num_backing_up = onesp = numprots = 0;
837 variable_trailing_context_rules = bol_needed = false;
839 out_linenum = linenum = sectnum = 1;
842 /* Used in mkprot() so that the first proto goes in slot 1
843 * of the proto queue.
847 set_up_initial_allocations();
851 /* readin - read in the rules section of the input file(s) */
855 static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;";
856 static char yy_nostdinit[] =
857 "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;";
859 line_directive_out( (FILE *) 0, 1 );
863 pinpoint_message( _( "fatal parse error" ) );
870 if ( backing_up_report )
872 backing_up_file = fopen( backing_name, "w" );
873 if ( backing_up_file == NULL )
875 _( "could not create backing-up info file %s" ),
880 backing_up_file = NULL;
882 if ( yymore_really_used == true )
884 else if ( yymore_really_used == false )
887 if ( reject_really_used == true )
889 else if ( reject_really_used == false )
892 if ( performance_report > 0 )
897 _( "-l AT&T lex compatibility option entails a large performance penalty\n" ) );
899 _( " and may be the actual source of other reported performance penalties\n" ) );
902 else if ( do_yylineno )
905 _( "%%option yylineno entails a large performance penalty\n" ) );
908 if ( performance_report > 1 )
912 _( "-I (interactive) entails a minor performance penalty\n" ) );
916 _( "yymore() entails a minor performance penalty\n" ) );
921 _( "REJECT entails a large performance penalty\n" ) );
923 if ( variable_trailing_context_rules )
925 _( "Variable trailing context rules entail a large performance penalty\n" ) );
931 if ( variable_trailing_context_rules )
934 if ( (fulltbl || fullspd) && reject )
938 _( "REJECT cannot be used with -f or -F" ) );
939 else if ( do_yylineno )
941 _( "%option yylineno cannot be used with -f or -F" ) );
944 _( "variable trailing context rules cannot be used with -f or -F" ) );
948 outn( "\n#define YY_USES_REJECT" );
952 outn( "\n#define yywrap() 1" );
953 outn( "#define YY_SKIP_YYWRAP" );
957 outn( "\n#define FLEX_DEBUG" );
960 outn( "typedef unsigned char YY_CHAR;" );
962 outn( "typedef char YY_CHAR;" );
966 outn( "#define yytext_ptr yytext" );
969 outn( "#define YY_INTERACTIVE" );
976 outn( "#ifdef VMS" );
977 outn( "#ifndef __VMS_POSIX" );
978 outn( yy_nostdinit );
988 outn( yy_nostdinit );
992 outn( "typedef yyconst struct yy_trans_info *yy_state_type;" );
993 else if ( ! C_plus_plus )
994 outn( "typedef int yy_state_type;" );
997 outn( "\n#define FLEX_DEBUG" );
1000 outn( "#define YY_FLEX_LEX_COMPAT" );
1002 if ( do_yylineno && ! C_plus_plus )
1004 outn( "extern int yylineno;" );
1005 outn( "int yylineno = 1;" );
1010 outn( "\n#include <FlexLexer.h>" );
1014 outn( "int yyFlexLexer::yylex()" );
1017 "\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );" );
1018 outn( "\treturn 0;" );
1021 out_str( "\n#define YY_DECL int %s::yylex()\n",
1028 if ( yytext_is_array )
1029 outn( "extern char yytext[];\n" );
1033 outn( "extern char *yytext;" );
1034 outn( "#define yytext_ptr yytext" );
1039 _( "%option yyclass only meaningful for C++ scanners" ) );
1043 numecs = cre8ecs( nextecm, ecgroup, csize );
1047 /* Now map the equivalence class for NUL to its expected place. */
1048 ecgroup[0] = ecgroup[csize];
1049 NUL_ec = ABS( ecgroup[0] );
1056 /* set_up_initial_allocations - allocate memory for internal tables */
1058 void set_up_initial_allocations()
1060 current_mns = INITIAL_MNS;
1061 firstst = allocate_integer_array( current_mns );
1062 lastst = allocate_integer_array( current_mns );
1063 finalst = allocate_integer_array( current_mns );
1064 transchar = allocate_integer_array( current_mns );
1065 trans1 = allocate_integer_array( current_mns );
1066 trans2 = allocate_integer_array( current_mns );
1067 accptnum = allocate_integer_array( current_mns );
1068 assoc_rule = allocate_integer_array( current_mns );
1069 state_type = allocate_integer_array( current_mns );
1071 current_max_rules = INITIAL_MAX_RULES;
1072 rule_type = allocate_integer_array( current_max_rules );
1073 rule_linenum = allocate_integer_array( current_max_rules );
1074 rule_useful = allocate_integer_array( current_max_rules );
1076 current_max_scs = INITIAL_MAX_SCS;
1077 scset = allocate_integer_array( current_max_scs );
1078 scbol = allocate_integer_array( current_max_scs );
1079 scxclu = allocate_integer_array( current_max_scs );
1080 sceof = allocate_integer_array( current_max_scs );
1081 scname = allocate_char_ptr_array( current_max_scs );
1083 current_maxccls = INITIAL_MAX_CCLS;
1084 cclmap = allocate_integer_array( current_maxccls );
1085 ccllen = allocate_integer_array( current_maxccls );
1086 cclng = allocate_integer_array( current_maxccls );
1088 current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE;
1089 ccltbl = allocate_Character_array( current_max_ccl_tbl_size );
1091 current_max_dfa_size = INITIAL_MAX_DFA_SIZE;
1093 current_max_xpairs = INITIAL_MAX_XPAIRS;
1094 nxt = allocate_integer_array( current_max_xpairs );
1095 chk = allocate_integer_array( current_max_xpairs );
1097 current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS;
1098 tnxt = allocate_integer_array( current_max_template_xpairs );
1100 current_max_dfas = INITIAL_MAX_DFAS;
1101 base = allocate_integer_array( current_max_dfas );
1102 def = allocate_integer_array( current_max_dfas );
1103 dfasiz = allocate_integer_array( current_max_dfas );
1104 accsiz = allocate_integer_array( current_max_dfas );
1105 dhash = allocate_integer_array( current_max_dfas );
1106 dss = allocate_int_ptr_array( current_max_dfas );
1107 dfaacc = allocate_dfaacc_union( current_max_dfas );
1109 nultrans = (int *) 0;
1118 _( "%s [-bcdfhilnpstvwBFILTV78+? -C[aefFmr] -ooutput -Pprefix -Sskeleton]\n" ),
1120 fprintf( f, _( "\t[--help --version] [file ...]\n" ) );
1122 fprintf( f, _( "\t-b generate backing-up information to %s\n" ),
1124 fprintf( f, _( "\t-c do-nothing POSIX option\n" ) );
1125 fprintf( f, _( "\t-d turn on debug mode in generated scanner\n" ) );
1126 fprintf( f, _( "\t-f generate fast, large scanner\n" ) );
1127 fprintf( f, _( "\t-h produce this help message\n" ) );
1128 fprintf( f, _( "\t-i generate case-insensitive scanner\n" ) );
1129 fprintf( f, _( "\t-l maximal compatibility with original lex\n" ) );
1130 fprintf( f, _( "\t-n do-nothing POSIX option\n" ) );
1131 fprintf( f, _( "\t-p generate performance report to stderr\n" ) );
1133 _( "\t-s suppress default rule to ECHO unmatched text\n" ) );
1135 if ( ! did_outfilename )
1137 sprintf( outfile_path, outfile_template,
1138 prefix, C_plus_plus ? "cc" : "c" );
1139 outfilename = outfile_path;
1143 _( "\t-t write generated scanner on stdout instead of %s\n" ),
1147 _( "\t-v write summary of scanner statistics to f\n" ) );
1148 fprintf( f, _( "\t-w do not generate warnings\n" ) );
1149 fprintf( f, _( "\t-B generate batch scanner (opposite of -I)\n" ) );
1151 _( "\t-F use alternative fast scanner representation\n" ) );
1153 _( "\t-I generate interactive scanner (opposite of -B)\n" ) );
1154 fprintf( f, _( "\t-L suppress #line directives in scanner\n" ) );
1155 fprintf( f, _( "\t-T %s should run in trace mode\n" ), program_name );
1156 fprintf( f, _( "\t-V report %s version\n" ), program_name );
1157 fprintf( f, _( "\t-7 generate 7-bit scanner\n" ) );
1158 fprintf( f, _( "\t-8 generate 8-bit scanner\n" ) );
1159 fprintf( f, _( "\t-+ generate C++ scanner class\n" ) );
1160 fprintf( f, _( "\t-? produce this help message\n" ) );
1162 _( "\t-C specify degree of table compression (default is -Cem):\n" ) );
1164 _( "\t\t-Ca trade off larger tables for better memory alignment\n" ) );
1165 fprintf( f, _( "\t\t-Ce construct equivalence classes\n" ) );
1167 _( "\t\t-Cf do not compress scanner tables; use -f representation\n" ) );
1169 _( "\t\t-CF do not compress scanner tables; use -F representation\n" ) );
1170 fprintf( f, _( "\t\t-Cm construct meta-equivalence classes\n" ) );
1172 _( "\t\t-Cr use read() instead of stdio for scanner input\n" ) );
1173 fprintf( f, _( "\t-o specify output filename\n" ) );
1174 fprintf( f, _( "\t-P specify scanner prefix other than \"yy\"\n" ) );
1175 fprintf( f, _( "\t-S specify skeleton file\n" ) );
1176 fprintf( f, _( "\t--help produce this help message\n" ) );
1177 fprintf( f, _( "\t--version report %s version\n" ), program_name );