diff options
Diffstat (limited to 'usr.bin/lex/main.c')
| -rw-r--r-- | usr.bin/lex/main.c | 989 |
1 files changed, 989 insertions, 0 deletions
diff --git a/usr.bin/lex/main.c b/usr.bin/lex/main.c new file mode 100644 index 000000000000..a90027add059 --- /dev/null +++ b/usr.bin/lex/main.c @@ -0,0 +1,989 @@ +/* flex - tool to generate fast lexical analyzers */ + +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Vern Paxson. + * + * The United States Government has rights in this work pursuant + * to contract no. DE-AC03-76SF00098 between the United States + * Department of Energy and the University of California. + * + * Redistribution and use in source and binary forms are permitted provided + * that: (1) source distributions retain this entire copyright notice and + * comment, and (2) distributions including binaries display the following + * acknowledgement: ``This product includes software developed by the + * University of California, Berkeley and its contributors'' in the + * documentation or other materials provided with the distribution and in + * all advertising materials mentioning features or use of this software. + * Neither the name of the University nor the names of its contributors may + * be used to endorse or promote products derived from this software without + * specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +char copyright[] = +"@(#) Copyright (c) 1990 The Regents of the University of California.\n\ + All rights reserved.\n"; +#endif /* not lint */ + +/* $Header: main.c,v 1.2 94/01/04 14:33:11 vern Exp $ */ + + +#include "flexdef.h" +#include "version.h" + +static char flex_version[] = FLEX_VERSION; + + +/* declare functions that have forward references */ + +void flexinit PROTO((int, char**)); +void readin PROTO((void)); +void set_up_initial_allocations PROTO((void)); + + +/* these globals are all defined and commented in flexdef.h */ +int printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt; +int interactive, caseins, lex_compat, useecs, fulltbl, usemecs; +int fullspd, gen_line_dirs, performance_report, backing_up_report; +int C_plus_plus, long_align, use_read, yytext_is_array, csize; +int yymore_used, reject, real_reject, continued_action; +int yymore_really_used, reject_really_used; +int datapos, dataline, linenum; +FILE *skelfile = NULL; +int skel_ind = 0; +char *action_array; +int action_size, defs1_offset, prolog_offset, action_offset, action_index; +char *infilename = NULL; +int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE]; +int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp; +int current_mns, num_rules, num_eof_rules, default_rule; +int current_max_rules, lastnfa; +int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2; +int *accptnum, *assoc_rule, *state_type; +int *rule_type, *rule_linenum, *rule_useful; +int current_state_type; +int variable_trailing_context_rules; +int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP]; +int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE]; +int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs, tecfwd[CSIZE + 1]; +int tecbck[CSIZE + 1]; +int lastsc, current_max_scs, *scset, *scbol, *scxclu, *sceof, *actvsc; +char **scname; +int current_max_dfa_size, current_max_xpairs; +int current_max_template_xpairs, current_max_dfas; +int lastdfa, *nxt, *chk, *tnxt; +int *base, *def, *nultrans, NUL_ec, tblend, firstfree, **dss, *dfasiz; +union dfaacc_union *dfaacc; +int *accsiz, *dhash, numas; +int numsnpairs, jambase, jamstate; +int lastccl, current_maxccls, *cclmap, *ccllen, *cclng, cclreuse; +int current_max_ccl_tbl_size; +Char *ccltbl; +char nmstr[MAXLINE]; +int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs; +int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave; +int num_backing_up, bol_needed; +FILE *backing_up_file; +int end_of_buffer_state; +char **input_files; +int num_input_files; +char *program_name; + +#ifndef SHORT_FILE_NAMES +static char *outfile_template = "lex.%s.%s"; +#else +static char *outfile_template = "lex%s.%s"; +#endif +static char outfile_path[64]; + +static int outfile_created = 0; +static int use_stdout; +static char *skelname = NULL; +static char *prefix = "yy"; + + +int main( argc, argv ) +int argc; +char **argv; + { + int i; + + flexinit( argc, argv ); + + readin(); + + ntod(); + + for ( i = 1; i <= num_rules; ++i ) + if ( ! rule_useful[i] && i != default_rule ) + line_warning( "rule cannot be matched", + rule_linenum[i] ); + + if ( spprdflt && ! reject && rule_useful[default_rule] ) + line_warning( "-s option given but default rule can be matched", + rule_linenum[default_rule] ); + + /* Generate the C state transition tables from the DFA. */ + make_tables(); + + /* Note, flexend does not return. It exits with its argument + * as status. + */ + flexend( 0 ); + + return 0; /* keep compilers/lint happy */ + } + + +/* flexend - terminate flex + * + * note + * This routine does not return. + */ + +void flexend( exit_status ) +int exit_status; + + { + int tblsiz; + int unlink(); + + if ( skelfile != NULL ) + { + if ( ferror( skelfile ) ) + flexfatal( + "error occurred when reading skeleton file" ); + + else if ( fclose( skelfile ) ) + flexfatal( + "error occurred when closing skeleton file" ); + } + + if ( exit_status != 0 && outfile_created ) + { + if ( ferror( stdout ) ) + flexfatal( "error occurred when writing output file" ); + + else if ( fclose( stdout ) ) + flexfatal( "error occurred when closing output file" ); + + else if ( unlink( outfile_path ) ) + flexfatal( "error occurred when deleting output file" ); + } + + if ( backing_up_report && backing_up_file ) + { + if ( num_backing_up == 0 ) + fprintf( backing_up_file, "No backing up.\n" ); + else if ( fullspd || fulltbl ) + fprintf( backing_up_file, + "%d backing up (non-accepting) states.\n", + num_backing_up ); + else + fprintf( backing_up_file, + "Compressed tables always back up.\n" ); + + if ( ferror( backing_up_file ) ) + flexfatal( "error occurred when writing backup file" ); + + else if ( fclose( backing_up_file ) ) + flexfatal( "error occurred when closing backup file" ); + } + + if ( printstats ) + { + fprintf( stderr, "%s version %s usage statistics:\n", + program_name, flex_version ); + + fprintf( stderr, " scanner options: -" ); + + if ( C_plus_plus ) + putc( '+', stderr ); + if ( backing_up_report ) + putc( 'b', stderr ); + if ( ddebug ) + putc( 'd', stderr ); + if ( caseins ) + putc( 'i', stderr ); + if ( lex_compat ) + putc( 'l', stderr ); + if ( performance_report > 0 ) + putc( 'p', stderr ); + if ( performance_report > 1 ) + putc( 'p', stderr ); + if ( spprdflt ) + putc( 's', stderr ); + if ( use_stdout ) + putc( 't', stderr ); + if ( printstats ) + putc( 'v', stderr ); /* always true! */ + if ( nowarn ) + putc( 'w', stderr ); + if ( ! interactive ) + putc( 'B', stderr ); + if ( interactive ) + putc( 'I', stderr ); + if ( ! gen_line_dirs ) + putc( 'L', stderr ); + if ( trace ) + putc( 'T', stderr ); + if ( csize == 128 ) + putc( '7', stderr ); + else + putc( '8', stderr ); + + fprintf( stderr, " -C" ); + + if ( long_align ) + putc( 'a', stderr ); + if ( fulltbl ) + putc( 'f', stderr ); + if ( fullspd ) + putc( 'F', stderr ); + if ( useecs ) + putc( 'e', stderr ); + if ( usemecs ) + putc( 'm', stderr ); + if ( use_read ) + putc( 'r', stderr ); + + if ( skelname ) + fprintf( stderr, " -S%s", skelname ); + + if ( strcmp( prefix, "yy" ) ) + fprintf( stderr, " -P%s", prefix ); + + putc( '\n', stderr ); + + fprintf( stderr, " %d/%d NFA states\n", lastnfa, current_mns ); + fprintf( stderr, " %d/%d DFA states (%d words)\n", lastdfa, + current_max_dfas, totnst ); + fprintf( stderr, " %d rules\n", + num_rules + num_eof_rules - 1 /* - 1 for def. rule */ ); + + if ( num_backing_up == 0 ) + fprintf( stderr, " No backing up\n" ); + else if ( fullspd || fulltbl ) + fprintf( stderr, + " %d backing-up (non-accepting) states\n", + num_backing_up ); + else + fprintf( stderr, + " Compressed tables always back-up\n" ); + + if ( bol_needed ) + fprintf( stderr, + " Beginning-of-line patterns used\n" ); + + fprintf( stderr, " %d/%d start conditions\n", lastsc, + current_max_scs ); + fprintf( stderr, + " %d epsilon states, %d double epsilon states\n", + numeps, eps2 ); + + if ( lastccl == 0 ) + fprintf( stderr, " no character classes\n" ); + else + fprintf( stderr, + " %d/%d character classes needed %d/%d words of storage, %d reused\n", + lastccl, current_maxccls, + cclmap[lastccl] + ccllen[lastccl], + current_max_ccl_tbl_size, cclreuse ); + + fprintf( stderr, " %d state/nextstate pairs created\n", + numsnpairs ); + fprintf( stderr, " %d/%d unique/duplicate transitions\n", + numuniq, numdup ); + + if ( fulltbl ) + { + tblsiz = lastdfa * numecs; + fprintf( stderr, " %d table entries\n", tblsiz ); + } + + else + { + tblsiz = 2 * (lastdfa + numtemps) + 2 * tblend; + + fprintf( stderr, " %d/%d base-def entries created\n", + lastdfa + numtemps, current_max_dfas ); + fprintf( stderr, + " %d/%d (peak %d) nxt-chk entries created\n", + tblend, current_max_xpairs, peakpairs ); + fprintf( stderr, + " %d/%d (peak %d) template nxt-chk entries created\n", + numtemps * nummecs, current_max_template_xpairs, + numtemps * numecs ); + fprintf( stderr, " %d empty table entries\n", nummt ); + fprintf( stderr, " %d protos created\n", numprots ); + fprintf( stderr, " %d templates created, %d uses\n", + numtemps, tmpuses ); + } + + if ( useecs ) + { + tblsiz = tblsiz + csize; + fprintf( stderr, + " %d/%d equivalence classes created\n", + numecs, csize ); + } + + if ( usemecs ) + { + tblsiz = tblsiz + numecs; + fprintf( stderr, + " %d/%d meta-equivalence classes created\n", + nummecs, csize ); + } + + fprintf( stderr, + " %d (%d saved) hash collisions, %d DFAs equal\n", + hshcol, hshsave, dfaeql ); + fprintf( stderr, " %d sets of reallocations needed\n", + num_reallocs ); + fprintf( stderr, " %d total table entries needed\n", tblsiz ); + } + +#ifndef VMS + exit( exit_status ); +#else + exit( exit_status + 1 ); +#endif + } + + +/* flexinit - initialize flex */ + +void flexinit( argc, argv ) +int argc; +char **argv; + { + int i, sawcmpflag; + int csize_given, interactive_given; + char *arg, *mktemp(); + + printstats = syntaxerror = trace = spprdflt = caseins = false; + lex_compat = false; + C_plus_plus = backing_up_report = ddebug = fulltbl = fullspd = false; + long_align = nowarn = yymore_used = continued_action = reject = false; + yytext_is_array = yymore_really_used = reject_really_used = false; + gen_line_dirs = usemecs = useecs = true; + performance_report = 0; + + sawcmpflag = false; + use_read = use_stdout = false; + csize_given = false; + interactive_given = false; + + /* Initialize dynamic array for holding the rule actions. */ + action_size = 2048; /* default size of action array in bytes */ + action_array = allocate_character_array( action_size ); + defs1_offset = prolog_offset = action_offset = action_index = 0; + action_array[0] = '\0'; + + program_name = argv[0]; + + if ( program_name[0] != '\0' && + program_name[strlen( program_name ) - 1] == '+' ) + C_plus_plus = true; + + /* read flags */ + for ( --argc, ++argv; argc ; --argc, ++argv ) + { + if ( argv[0][0] != '-' || argv[0][1] == '\0' ) + break; + + arg = argv[0]; + + for ( i = 1; arg[i] != '\0'; ++i ) + switch ( arg[i] ) + { + case '+': + C_plus_plus = true; + break; + + case 'B': + interactive = false; + interactive_given = true; + break; + + case 'b': + backing_up_report = true; + break; + + case 'c': + fprintf( stderr, + "%s: Assuming use of deprecated -c flag is really intended to be -C\n", + program_name ); + + /* fall through */ + + case 'C': + if ( i != 1 ) + flexerror( + "-C flag must be given separately" ); + + if ( ! sawcmpflag ) + { + useecs = false; + usemecs = false; + fulltbl = false; + sawcmpflag = true; + } + + for ( ++i; arg[i] != '\0'; ++i ) + switch ( arg[i] ) + { + case 'a': + long_align = + true; + break; + + case 'e': + useecs = true; + break; + + case 'F': + fullspd = true; + break; + + case 'f': + fulltbl = true; + break; + + case 'm': + usemecs = true; + break; + + case 'r': + use_read = true; + break; + + default: + lerrif( + "unknown -C option '%c'", + (int) arg[i] ); + break; + } + + goto get_next_arg; + + case 'd': + ddebug = true; + break; + + case 'f': + useecs = usemecs = false; + use_read = fulltbl = true; + break; + + case 'F': + useecs = usemecs = false; + use_read = fullspd = true; + break; + + case 'h': + usage(); + exit( 0 ); + + case 'I': + interactive = true; + interactive_given = true; + break; + + case 'i': + caseins = true; + break; + + case 'l': + lex_compat = true; + break; + + case 'L': + gen_line_dirs = false; + break; + + case 'n': + /* Stupid do-nothing deprecated + * option. + */ + break; + + case 'P': + if ( i != 1 ) + flexerror( + "-P flag must be given separately" ); + + prefix = arg + i + 1; + goto get_next_arg; + + case 'p': + ++performance_report; + break; + + case 'S': + if ( i != 1 ) + flexerror( + "-S flag must be given separately" ); + + skelname = arg + i + 1; + goto get_next_arg; + + case 's': + spprdflt = true; + break; + + case 't': + use_stdout = true; + break; + + case 'T': + trace = true; + break; + + case 'v': + printstats = true; + break; + + case 'V': + fprintf( stderr, "%s version %s\n", + program_name, flex_version ); + exit( 0 ); + + case 'w': + nowarn = true; + break; + + case '7': + csize = 128; + csize_given = true; + break; + + case '8': + csize = CSIZE; + csize_given = true; + break; + + default: + fprintf( stderr, + "%s: unknown flag '%c'\n", + program_name, (int) arg[i] ); + usage(); + exit( 1 ); + } + + /* Used by -C, -S and -P flags in lieu of a "continue 2" + * control. + */ + get_next_arg: ; + } + + if ( ! csize_given ) + { + if ( (fulltbl || fullspd) && ! useecs ) + csize = DEFAULT_CSIZE; + else + csize = CSIZE; + } + + if ( ! interactive_given ) + { + if ( fulltbl || fullspd ) + interactive = false; + else + interactive = true; + } + + if ( lex_compat ) + { + if ( C_plus_plus ) + flexerror( "Can't use -+ with -l option" ); + + if ( fulltbl || fullspd ) + flexerror( "Can't use -f or -F with -l option" ); + + /* Don't rely on detecting use of yymore() and REJECT, + * just assume they'll be used. + */ + yymore_really_used = reject_really_used = true; + + yytext_is_array = true; + use_read = false; + } + + if ( (fulltbl || fullspd) && usemecs ) + flexerror( "-Cf/-CF and -Cm don't make sense together" ); + + if ( (fulltbl || fullspd) && interactive ) + flexerror( "-Cf/-CF and -I are incompatible" ); + + if ( fulltbl && fullspd ) + flexerror( "-Cf and -CF are mutually exclusive" ); + + if ( C_plus_plus && fullspd ) + flexerror( "Can't use -+ with -CF option" ); + + if ( ! use_stdout ) + { + FILE *prev_stdout; + char *suffix; + + if ( C_plus_plus ) + suffix = "cc"; + else + suffix = "c"; + + sprintf( outfile_path, outfile_template, prefix, suffix ); + + prev_stdout = freopen( outfile_path, "w", stdout ); + + if ( prev_stdout == NULL ) + lerrsf( "could not create %s", outfile_path ); + + outfile_created = 1; + } + + num_input_files = argc; + input_files = argv; + set_input_file( num_input_files > 0 ? input_files[0] : NULL ); + + if ( backing_up_report ) + { +#ifndef SHORT_FILE_NAMES + backing_up_file = fopen( "lex.backup", "w" ); +#else + backing_up_file = fopen( "lex.bck", "w" ); +#endif + + if ( backing_up_file == NULL ) + flexerror( "could not create lex.backup" ); + } + + else + backing_up_file = NULL; + + + lastccl = 0; + lastsc = 0; + + if ( skelname && (skelfile = fopen( skelname, "r" )) == NULL ) + lerrsf( "can't open skeleton file %s", skelname ); + + if ( strcmp( prefix, "yy" ) ) + { +#define GEN_PREFIX(name) printf( "#define yy%s %s%s\n", name, prefix, name ); + GEN_PREFIX( "FlexLexer" ); + GEN_PREFIX( "_create_buffer" ); + GEN_PREFIX( "_delete_buffer" ); + GEN_PREFIX( "_flex_debug" ); + GEN_PREFIX( "_init_buffer" ); + GEN_PREFIX( "_load_buffer_state" ); + GEN_PREFIX( "_switch_to_buffer" ); + GEN_PREFIX( "in" ); + GEN_PREFIX( "leng" ); + GEN_PREFIX( "lex" ); + GEN_PREFIX( "out" ); + GEN_PREFIX( "restart" ); + GEN_PREFIX( "text" ); + GEN_PREFIX( "wrap" ); + printf( "\n" ); + } + + + lastdfa = lastnfa = 0; + num_rules = num_eof_rules = default_rule = 0; + numas = numsnpairs = tmpuses = 0; + numecs = numeps = eps2 = num_reallocs = hshcol = dfaeql = totnst = 0; + numuniq = numdup = hshsave = eofseen = datapos = dataline = 0; + num_backing_up = onesp = numprots = 0; + variable_trailing_context_rules = bol_needed = false; + + linenum = sectnum = 1; + firstprot = NIL; + + /* Used in mkprot() so that the first proto goes in slot 1 + * of the proto queue. + */ + lastprot = 1; + + if ( useecs ) + { + /* Set up doubly-linked equivalence classes. */ + + /* We loop all the way up to csize, since ecgroup[csize] is + * the position used for NUL characters. + */ + ecgroup[1] = NIL; + + for ( i = 2; i <= csize; ++i ) + { + ecgroup[i] = i - 1; + nextecm[i - 1] = i; + } + + nextecm[csize] = NIL; + } + + else + { + /* Put everything in its own equivalence class. */ + for ( i = 1; i <= csize; ++i ) + { + ecgroup[i] = i; + nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */ + } + } + + set_up_initial_allocations(); + } + + +/* readin - read in the rules section of the input file(s) */ + +void readin() + { + skelout(); + + line_directive_out( (FILE *) 0 ); + + if ( yyparse() ) + { + pinpoint_message( "fatal parse error" ); + flexend( 1 ); + } + + if ( syntaxerror ) + flexend( 1 ); + + if ( yymore_really_used == REALLY_USED ) + yymore_used = true; + else if ( yymore_really_used == REALLY_NOT_USED ) + yymore_used = false; + + if ( reject_really_used == REALLY_USED ) + reject = true; + else if ( reject_really_used == REALLY_NOT_USED ) + reject = false; + + if ( performance_report > 0 ) + { + if ( lex_compat ) + { + fprintf( stderr, +"-l AT&T lex compatibility option entails a large performance penalty\n" ); + fprintf( stderr, +" and may be the actual source of other reported performance penalties\n" ); + } + + if ( performance_report > 1 ) + { + if ( interactive ) + fprintf( stderr, + "-I (interactive) entails a minor performance penalty\n" ); + + if ( yymore_used ) + fprintf( stderr, + "yymore() entails a minor performance penalty\n" ); + } + + if ( reject ) + fprintf( stderr, + "REJECT entails a large performance penalty\n" ); + + if ( variable_trailing_context_rules ) + fprintf( stderr, +"Variable trailing context rules entail a large performance penalty\n" ); + } + + if ( reject ) + real_reject = true; + + if ( variable_trailing_context_rules ) + reject = true; + + if ( (fulltbl || fullspd) && reject ) + { + if ( real_reject ) + flexerror( "REJECT cannot be used with -f or -F" ); + else + flexerror( + "variable trailing context rules cannot be used with -f or -F" ); + } + + if ( csize == 256 ) + puts( "typedef unsigned char YY_CHAR;" ); + else + puts( "typedef char YY_CHAR;" ); + + if ( C_plus_plus ) + { + puts( "#define yytext_ptr yytext" ); + + if ( interactive ) + puts( "#define YY_INTERACTIVE" ); + } + + if ( fullspd ) + printf( + "typedef const struct yy_trans_info *yy_state_type;\n" ); + else if ( ! C_plus_plus ) + printf( "typedef int yy_state_type;\n" ); + + if ( reject ) + printf( "\n#define YY_USES_REJECT\n" ); + + if ( ddebug ) + puts( "\n#define FLEX_DEBUG" ); + + if ( lex_compat ) + { + printf( "FILE *yyin = stdin, *yyout = stdout;\n" ); + printf( "extern int yylineno;\n" ); + printf( "int yylineno = 1;\n" ); + } + else if ( ! C_plus_plus ) + printf( "FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;\n" ); + + if ( C_plus_plus ) + printf( "\n#include <FlexLexer.h>\n" ); + + else + { + if ( yytext_is_array ) + puts( "extern char yytext[];\n" ); + + else + { + puts( "extern char *yytext;" ); + puts( "#define yytext_ptr yytext" ); + } + } + + if ( useecs ) + numecs = cre8ecs( nextecm, ecgroup, csize ); + else + numecs = csize; + + /* Now map the equivalence class for NUL to its expected place. */ + ecgroup[0] = ecgroup[csize]; + NUL_ec = ABS( ecgroup[0] ); + + if ( useecs ) + ccl2ecl(); + } + + +/* set_up_initial_allocations - allocate memory for internal tables */ + +void set_up_initial_allocations() + { + current_mns = INITIAL_MNS; + firstst = allocate_integer_array( current_mns ); + lastst = allocate_integer_array( current_mns ); + finalst = allocate_integer_array( current_mns ); + transchar = allocate_integer_array( current_mns ); + trans1 = allocate_integer_array( current_mns ); + trans2 = allocate_integer_array( current_mns ); + accptnum = allocate_integer_array( current_mns ); + assoc_rule = allocate_integer_array( current_mns ); + state_type = allocate_integer_array( current_mns ); + + current_max_rules = INITIAL_MAX_RULES; + rule_type = allocate_integer_array( current_max_rules ); + rule_linenum = allocate_integer_array( current_max_rules ); + rule_useful = allocate_integer_array( current_max_rules ); + + current_max_scs = INITIAL_MAX_SCS; + scset = allocate_integer_array( current_max_scs ); + scbol = allocate_integer_array( current_max_scs ); + scxclu = allocate_integer_array( current_max_scs ); + sceof = allocate_integer_array( current_max_scs ); + scname = allocate_char_ptr_array( current_max_scs ); + actvsc = allocate_integer_array( current_max_scs ); + + current_maxccls = INITIAL_MAX_CCLS; + cclmap = allocate_integer_array( current_maxccls ); + ccllen = allocate_integer_array( current_maxccls ); + cclng = allocate_integer_array( current_maxccls ); + + current_max_ccl_tbl_size = INITIAL_MAX_CCL_TBL_SIZE; + ccltbl = allocate_Character_array( current_max_ccl_tbl_size ); + + current_max_dfa_size = INITIAL_MAX_DFA_SIZE; + + current_max_xpairs = INITIAL_MAX_XPAIRS; + nxt = allocate_integer_array( current_max_xpairs ); + chk = allocate_integer_array( current_max_xpairs ); + + current_max_template_xpairs = INITIAL_MAX_TEMPLATE_XPAIRS; + tnxt = allocate_integer_array( current_max_template_xpairs ); + + current_max_dfas = INITIAL_MAX_DFAS; + base = allocate_integer_array( current_max_dfas ); + def = allocate_integer_array( current_max_dfas ); + dfasiz = allocate_integer_array( current_max_dfas ); + accsiz = allocate_integer_array( current_max_dfas ); + dhash = allocate_integer_array( current_max_dfas ); + dss = allocate_int_ptr_array( current_max_dfas ); + dfaacc = allocate_dfaacc_union( current_max_dfas ); + + nultrans = (int *) 0; + } + + +void usage() + { + fprintf( stderr, +"%s [-bcdfhilnpstvwBFILTV78+ -C[aefFmr] -Pprefix -Sskeleton] [file ...]\n", + program_name ); + + fprintf( stderr, + "\t-b generate backing-up information to lex.backup\n" ); + fprintf( stderr, "\t-c do-nothing POSIX option\n" ); + fprintf( stderr, "\t-d turn on debug mode in generated scanner\n" ); + fprintf( stderr, "\t-f generate fast, large scanner\n" ); + fprintf( stderr, "\t-h produce this help message\n" ); + fprintf( stderr, "\t-i generate case-insensitive scanner\n" ); + fprintf( stderr, "\t-l maximal compatibility with original lex\n" ); + fprintf( stderr, "\t-n do-nothing POSIX option\n" ); + fprintf( stderr, "\t-p generate performance report to stderr\n" ); + fprintf( stderr, + "\t-s suppress default rule to ECHO unmatched text\n" ); + fprintf( stderr, + "\t-t write generated scanner on stdout instead of lex.yy.c\n" ); + fprintf( stderr, + "\t-v write summary of scanner statistics to stderr\n" ); + fprintf( stderr, "\t-w do not generate warnings\n" ); + fprintf( stderr, "\t-B generate batch scanner (opposite of -I)\n" ); + fprintf( stderr, + "\t-F use alternative fast scanner representation\n" ); + fprintf( stderr, + "\t-I generate interactive scanner (opposite of -B)\n" ); + fprintf( stderr, "\t-L suppress #line directives in scanner\n" ); + fprintf( stderr, "\t-T %s should run in trace mode\n", program_name ); + fprintf( stderr, "\t-V report %s version\n", program_name ); + fprintf( stderr, "\t-7 generate 7-bit scanner\n" ); + fprintf( stderr, "\t-8 generate 8-bit scanner\n" ); + fprintf( stderr, "\t-+ generate C++ scanner class\n" ); + fprintf( stderr, + "\t-C specify degree of table compression (default is -Cem):\n" ); + fprintf( stderr, + "\t\t-Ca trade off larger tables for better memory alignment\n" ); + fprintf( stderr, "\t\t-Ce construct equivalence classes\n" ); + fprintf( stderr, + "\t\t-Cf do not compress scanner tables; use -f representation\n" ); + fprintf( stderr, + "\t\t-CF do not compress scanner tables; use -F representation\n" ); + fprintf( stderr, "\t\t-Cm construct meta-equivalence classes\n" ); + fprintf( stderr, + "\t\t-Cr use read() instead of stdio for scanner input\n" ); + fprintf( stderr, "\t-P specify scanner prefix other than \"yy\"\n" ); + fprintf( stderr, "\t-S specify skeleton file\n" ); + } |