/* 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. */

/*  This file is part of flex. */

/*  Redistribution and use in source and binary forms, with or without */
/*  modification, are permitted provided that the following conditions */
/*  are met: */

/*  1. Redistributions of source code must retain the above copyright */
/*     notice, this list of conditions and the following disclaimer. */
/*  2. Redistributions in binary form must reproduce the above copyright */
/*     notice, this list of conditions and the following disclaimer in the */
/*     documentation and/or other materials provided with the distribution. */

/*  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. */


#include "flexdef.h"
#include "version.h"
#include "options.h"
#include "tables.h"
#include "parse.h"

static char flex_version[] = FLEX_VERSION;

/* declare functions that have forward references */

void flexinit(int, char **);
void readin(void);
void set_up_initial_allocations(void);


/* these globals are all defined and commented in flexdef.h */
int     printstats, syntaxerror, eofseen, ddebug, trace, nowarn, spprdflt;
int     interactive, lex_compat, posix_compat, do_yylineno,
	useecs, fulltbl, usemecs;
int     fullspd, gen_line_dirs, performance_report, backing_up_report;
int     C_plus_plus, long_align, use_read, yytext_is_array, do_yywrap,
	csize;
int     reentrant, bison_bridge_lval, bison_bridge_lloc;
int     yymore_used, reject, real_reject, continued_action, in_rule;
int     yymore_really_used, reject_really_used;
int     trace_hex = 0;
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, *outfilename = NULL, *headerfilename = NULL;
int     did_outfilename;
char   *prefix, *yyclass, *extra_type = NULL;
int     do_stdinit, use_stdout;
int     onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE];
int     onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp;
int     maximum_mns, current_mns, current_max_rules;
int     num_rules, num_eof_rules, default_rule, 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, *scset, *scbol, *scxclu, *sceof;
int     current_max_scs;
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, *cclmap, *ccllen, *cclng, cclreuse;
int     current_maxccls, current_max_ccl_tbl_size;
unsigned 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;
jmp_buf flex_main_jmp_buf;
bool   *rule_has_nl, *ccl_has_nl;
int     nlch = '\n';
bool    ansi_func_defs, ansi_func_protos;

bool    tablesext, tablesverify, gentables;
char   *tablesfilename=0,*tablesname=0;
struct yytbl_writer tableswr;

/* Make sure program_name is initialized so we don't crash if writing
 * out an error message before getting the program name from argv[0].
 */
char   *program_name = "flex";

static const char outfile_template[] = "lex.%s.%s";
static const char backing_name[] = "lex.backup";
static const char tablesfile_template[] = "lex.%s.tables";

/* From scan.l */
extern FILE* yyout;

static char outfile_path[MAXLINE];
static int outfile_created = 0;
static char *skelname = NULL;
static int _stdout_closed = 0; /* flag to prevent double-fclose() on stdout. */
const char *escaped_qstart = "[[]]M4_YY_NOOP[M4_YY_NOOP[M4_YY_NOOP[[]]";
const char *escaped_qend   = "[[]]M4_YY_NOOP]M4_YY_NOOP]M4_YY_NOOP[[]]";

/* For debugging. The max number of filters to apply to skeleton. */
static int preproc_level = 1000;

int flex_main (int argc, char *argv[]);

int flex_main (int argc, char *argv[])
{
	int     i, exit_status, child_status;

	/* Set a longjmp target. Yes, I know it's a hack, but it gets worse: The
	 * return value of setjmp, if non-zero, is the desired exit code PLUS ONE.
	 * For example, if you want 'main' to return with code '2', then call
	 * longjmp() with an argument of 3. This is because it is invalid to
	 * specify a value of 0 to longjmp. FLEX_EXIT(n) should be used instead of
	 * exit(n);
	 */
	exit_status = setjmp (flex_main_jmp_buf);
	if (exit_status){
        if (stdout && !_stdout_closed && !ferror(stdout)){
            fflush(stdout);
            fclose(stdout);
        }
        while (wait(&child_status) > 0){
            if (!WIFEXITED (child_status)
                || WEXITSTATUS (child_status) != 0){
                /* report an error of a child
                 */
                if( exit_status <= 1 )
                    exit_status = 2;

            }
        }
        return exit_status - 1;
    }

	flexinit (argc, argv);

	readin ();

	skelout ();
	/* %% [1.5] DFA */
	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 */
}

/* Wrapper around flex_main, so flex_main can be built as a library. */
int main (int argc, char *argv[])
{
#if ENABLE_NLS
#if HAVE_LOCALE_H
	setlocale (LC_MESSAGES, "");
        setlocale (LC_CTYPE, "");
	textdomain (PACKAGE);
	bindtextdomain (PACKAGE, LOCALEDIR);
#endif
#endif

	return flex_main (argc, argv);
}

/* check_options - check user-specified options */

void check_options (void)
{
	int     i;
    const char * m4 = NULL;

	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"));

		if (reentrant || bison_bridge_lval)
			flexerror (_
				   ("Can't use --reentrant or --bison-bridge with -l option"));

		yytext_is_array = true;
		do_yylineno = true;
		use_read = false;
	}


#if 0
	/* This makes no sense whatsoever. I'm removing it. */
	if (do_yylineno)
		/* This should really be "maintain_backup_tables = true" */
		reject_really_used = true;
#endif

	if (csize == unspecified) {
		if ((fulltbl || fullspd) && !useecs)
			csize = DEFAULT_CSIZE;
		else
			csize = CSIZE;
	}

	if (interactive == unspecified) {
		if (fulltbl || fullspd)
			interactive = false;
		else
			interactive = true;
	}

	if (fulltbl || fullspd) {
		if (usemecs)
			flexerror (_
				   ("-Cf/-CF and -Cm don't make sense together"));

		if (interactive)
			flexerror (_("-Cf/-CF and -I are incompatible"));

		if (lex_compat)
			flexerror (_
				   ("-Cf/-CF are incompatible with lex-compatibility mode"));


		if (fulltbl && fullspd)
			flexerror (_
				   ("-Cf and -CF are mutually exclusive"));
	}

	if (C_plus_plus && fullspd)
		flexerror (_("Can't use -+ with -CF option"));

	if (C_plus_plus && yytext_is_array) {
		warn (_("%array incompatible with -+ option"));
		yytext_is_array = false;
	}

	if (C_plus_plus && (reentrant))
		flexerror (_("Options -+ and --reentrant are mutually exclusive."));

	if (C_plus_plus && bison_bridge_lval)
		flexerror (_("bison bridge not supported for the C++ scanner."));


	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 */
		}
	}

    if (!ansi_func_defs)
        buf_m4_define( &m4defs_buf, "M4_YY_NO_ANSI_FUNC_DEFS", NULL);

    if (!ansi_func_protos)
        buf_m4_define( &m4defs_buf, "M4_YY_NO_ANSI_FUNC_PROTOS", NULL);

    if (extra_type)
        buf_m4_define( &m4defs_buf, "M4_EXTRA_TYPE_DEFS", extra_type);

	if (!use_stdout) {
		FILE   *prev_stdout;

		if (!did_outfilename) {
			char   *suffix;

			if (C_plus_plus)
				suffix = "cc";
			else
				suffix = "c";

			snprintf (outfile_path, sizeof(outfile_path), outfile_template,
				 prefix, suffix);

			outfilename = outfile_path;
		}

		prev_stdout = freopen (outfilename, "w+", stdout);

		if (prev_stdout == NULL)
			lerr (_("could not create %s"), outfilename);

		outfile_created = 1;
	}


    /* Setup the filter chain. */
    output_chain = filter_create_int(NULL, filter_tee_header, headerfilename);
    if ( !(m4 = getenv("M4"))) {
	    char *slash;
		m4 = M4;
		if ((slash = strrchr(M4, '/')) != NULL) {
			m4 = slash+1;
			/* break up $PATH */
			const char *path = getenv("PATH");
			if (!path) {
				m4 = M4;
			} else {
				do {
					char m4_path[PATH_MAX];
					int length = strlen(path);
					struct stat sbuf;

					const char *endOfDir = strchr(path, ':');
					if (!endOfDir)
						endOfDir = path+length;

					if ((endOfDir-path+2) >= sizeof(m4_path)) {
					    path = endOfDir+1;
						continue;
					}

					strncpy(m4_path, path, sizeof(m4_path));
					m4_path[endOfDir-path] = '/';
					m4_path[endOfDir-path+1] = '\0';
					strncat(m4_path, m4, sizeof(m4_path));
					if (stat(m4_path, &sbuf) == 0 &&
						(S_ISREG(sbuf.st_mode)) && sbuf.st_mode & S_IXUSR) {
						m4 = strdup(m4_path);
						break;
					}
					path = endOfDir+1;
				} while (path[0]);
				if (!path[0])
				    m4 = M4;
			}
		}
	}
    filter_create_ext(output_chain, m4, "-P", 0);
    filter_create_int(output_chain, filter_fix_linedirs, NULL);

    /* For debugging, only run the requested number of filters. */
    if (preproc_level > 0) {
        filter_truncate(output_chain, preproc_level);
        filter_apply_chain(output_chain);
    }
    yyout = stdout;


	/* always generate the tablesverify flag. */
	buf_m4_define (&m4defs_buf, "M4_YY_TABLES_VERIFY", tablesverify ? "1" : "0");
	if (tablesext)
		gentables = false;

	if (tablesverify)
		/* force generation of C tables. */
		gentables = true;


	if (tablesext) {
		FILE   *tablesout;
		struct yytbl_hdr hdr;
		char   *pname = 0;
		int     nbytes = 0;

		buf_m4_define (&m4defs_buf, "M4_YY_TABLES_EXTERNAL", NULL);

		if (!tablesfilename) {
			nbytes = strlen (prefix) + strlen (tablesfile_template) + 2;
			tablesfilename = pname = calloc(nbytes, 1);
			snprintf (pname, nbytes, tablesfile_template, prefix);
		}

		if ((tablesout = fopen (tablesfilename, "w")) == NULL)
			lerr (_("could not create %s"), tablesfilename);
		free(pname);
		tablesfilename = 0;

		yytbl_writer_init (&tableswr, tablesout);

		nbytes = strlen (prefix) + strlen ("tables") + 2;
		tablesname = calloc(nbytes, 1);
		snprintf (tablesname, nbytes, "%stables", prefix);
		yytbl_hdr_init (&hdr, flex_version, tablesname);

		if (yytbl_hdr_fwrite (&tableswr, &hdr) <= 0)
			flexerror (_("could not write tables header"));
	}

	if (skelname && (skelfile = fopen (skelname, "r")) == NULL)
		lerr (_("can't open skeleton file %s"), skelname);

	if (reentrant) {
        buf_m4_define (&m4defs_buf, "M4_YY_REENTRANT", NULL);
		if (yytext_is_array)
			buf_m4_define (&m4defs_buf, "M4_YY_TEXT_IS_ARRAY", NULL);
	}

	if ( bison_bridge_lval)
		buf_m4_define (&m4defs_buf, "M4_YY_BISON_LVAL", NULL);

	if ( bison_bridge_lloc)
        buf_m4_define (&m4defs_buf, "<M4_YY_BISON_LLOC>", NULL);

    buf_m4_define(&m4defs_buf, "M4_YY_PREFIX", prefix);

	if (did_outfilename)
		line_directive_out (stdout, 0);

	if (do_yylineno)
		buf_m4_define (&m4defs_buf, "M4_YY_USE_LINENO", NULL);

	/* Create the alignment type. */
	buf_strdefine (&userdef_buf, "YY_INT_ALIGNED",
		       long_align ? "long int" : "short int");

    /* Define the start condition macros. */
    {
        struct Buf tmpbuf;
        buf_init(&tmpbuf, sizeof(char));
        for (i = 1; i <= lastsc; i++) {
             char *str, *fmt = "#define %s %d\n";
             size_t strsz;

             strsz = strlen(fmt) + strlen(scname[i]) + (int)(1 + log10(i)) + 2;
             str = malloc(strsz);
             if (!str)
               flexfatal(_("allocation of macro definition failed"));
             snprintf(str, strsz, fmt,      scname[i], i - 1);
             buf_strappend(&tmpbuf, str);
             free(str);
        }
        buf_m4_define(&m4defs_buf, "M4_YY_SC_DEFS", tmpbuf.elts);
        buf_destroy(&tmpbuf);
    }

    /* This is where we begin writing to the file. */

    /* Dump the %top code. */
    if( top_buf.elts)
        outn((char*) top_buf.elts);

    /* Dump the m4 definitions. */
    buf_print_strings(&m4defs_buf, stdout);
    m4defs_buf.nelts = 0; /* memory leak here. */

    /* Place a bogus line directive, it will be fixed in the filter. */
    if (gen_line_dirs)
        outn("#line 0 \"M4_YY_OUTFILE_NAME\"\n");

	/* Dump the user defined preproc directives. */
	if (userdef_buf.elts)
		outn ((char *) (userdef_buf.elts));

	skelout ();
	/* %% [1.0] */
}

/* flexend - terminate flex
 *
 * note
 *    This routine does not return.
 */

void flexend (int exit_status)
{
	static int called_before = -1;	/* prevent infinite recursion. */
	int     tblsiz;

	if (++called_before)
		FLEX_EXIT (exit_status);

	if (skelfile != NULL) {
		if (ferror (skelfile))
			lerr (_("input error reading skeleton file %s"),
				skelname);

		else if (fclose (skelfile))
			lerr (_("error closing skeleton file %s"),
				skelname);
	}

#if 0
		fprintf (header_out,
			 "#ifdef YY_HEADER_EXPORT_START_CONDITIONS\n");
		fprintf (header_out,
			 "/* Beware! Start conditions are not prefixed. */\n");

		/* Special case for "INITIAL" */
		fprintf (header_out,
			 "#undef INITIAL\n#define INITIAL 0\n");
		for (i = 2; i <= lastsc; i++)
			fprintf (header_out, "#define %s %d\n", scname[i], i - 1);
		fprintf (header_out,
			 "#endif /* YY_HEADER_EXPORT_START_CONDITIONS */\n\n");

		/* Kill ALL flex-related macros. This is so the user
		 * can #include more than one generated header file. */
		fprintf (header_out, "#ifndef YY_HEADER_NO_UNDEFS\n");
		fprintf (header_out,
			 "/* Undefine all internal macros, etc., that do no belong in the header. */\n\n");

        {
            const char * undef_list[] = {

                "BEGIN",
                "ECHO",
                "EOB_ACT_CONTINUE_SCAN",
                "EOB_ACT_END_OF_FILE",
                "EOB_ACT_LAST_MATCH",
                "FLEX_SCANNER",
                "REJECT",
                "YYFARGS0",
                "YYFARGS1",
                "YYFARGS2",
                "YYFARGS3",
                "YYLMAX",
                "YYSTATE",
                "YY_AT_BOL",
                "YY_BREAK",
                "YY_BUFFER_EOF_PENDING",
                "YY_BUFFER_NEW",
                "YY_BUFFER_NORMAL",
                "YY_BUF_SIZE",
                "M4_YY_CALL_LAST_ARG",
                "M4_YY_CALL_ONLY_ARG",
                "YY_CURRENT_BUFFER",
                "YY_DECL",
                "M4_YY_DECL_LAST_ARG",
                "M4_YY_DEF_LAST_ARG",
                "M4_YY_DEF_ONLY_ARG",
                "YY_DO_BEFORE_ACTION",
                "YY_END_OF_BUFFER",
                "YY_END_OF_BUFFER_CHAR",
                "YY_EXIT_FAILURE",
                "YY_EXTRA_TYPE",
                "YY_FATAL_ERROR",
                "YY_FLEX_DEFINED_ECHO",
                "YY_FLEX_LEX_COMPAT",
                "YY_FLEX_MAJOR_VERSION",
                "YY_FLEX_MINOR_VERSION",
                "YY_FLEX_SUBMINOR_VERSION",
                "YY_FLUSH_BUFFER",
                "YY_G",
                "YY_INPUT",
                "YY_INTERACTIVE",
                "YY_INT_ALIGNED",
                "YY_LAST_ARG",
                "YY_LESS_LINENO",
                "YY_LEX_ARGS",
                "YY_LEX_DECLARATION",
                "YY_LEX_PROTO",
                "YY_MAIN",
                "YY_MORE_ADJ",
                "YY_NEED_STRLEN",
                "YY_NEW_FILE",
                "YY_NULL",
                "YY_NUM_RULES",
                "YY_ONLY_ARG",
                "YY_PARAMS",
                "YY_PROTO",
                "M4_YY_PROTO_LAST_ARG",
                "M4_YY_PROTO_ONLY_ARG void",
                "YY_READ_BUF_SIZE",
                "YY_REENTRANT",
                "YY_RESTORE_YY_MORE_OFFSET",
                "YY_RULE_SETUP",
                "YY_SC_TO_UI",
                "YY_SKIP_YYWRAP",
                "YY_START",
                "YY_START_STACK_INCR",
                "YY_STATE_EOF",
                "YY_STDINIT",
                "YY_TRAILING_HEAD_MASK",
                "YY_TRAILING_MASK",
                "YY_USER_ACTION",
                "YY_USE_CONST",
                "YY_USE_PROTOS",
                "unput",
                "yyTABLES_NAME",
                "yy_create_buffer",
                "yy_delete_buffer",
                "yy_flex_debug",
                "yy_flush_buffer",
                "yy_init_buffer",
                "yy_load_buffer_state",
                "yy_new_buffer",
                "yy_scan_buffer",
                "yy_scan_bytes",
                "yy_scan_string",
                "yy_set_bol",
                "yy_set_interactive",
                "yy_switch_to_buffer",
				"yypush_buffer_state",
				"yypop_buffer_state",
				"yyensure_buffer_stack",
                "yyalloc",
                "yyconst",
                "yyextra",
                "yyfree",
                "yyget_debug",
                "yyget_extra",
                "yyget_in",
                "yyget_leng",
                "yyget_lineno",
                "yyget_lloc",
                "yyget_lval",
                "yyget_out",
                "yyget_text",
                "yyin",
                "yyleng",
                "yyless",
                "yylex",
                "yylex_destroy",
                "yylex_init",
                "yylex_init_extra",
                "yylineno",
                "yylloc",
                "yylval",
                "yymore",
                "yyout",
                "yyrealloc",
                "yyrestart",
                "yyset_debug",
                "yyset_extra",
                "yyset_in",
                "yyset_lineno",
                "yyset_lloc",
                "yyset_lval",
                "yyset_out",
                "yytables_destroy",
                "yytables_fload",
                "yyterminate",
                "yytext",
                "yytext_ptr",
                "yywrap",

                /* must be null-terminated */
                NULL};


                for (i=0; undef_list[i] != NULL; i++)
                    fprintf (header_out, "#undef %s\n", undef_list[i]);
        }

		/* undef any of the auto-generated symbols. */
		for (i = 0; i < defs_buf.nelts; i++) {

			/* don't undef start conditions */
			if (sclookup (((char **) defs_buf.elts)[i]) > 0)
				continue;
			fprintf (header_out, "#undef %s\n",
				 ((char **) defs_buf.elts)[i]);
		}

		fprintf (header_out,
			 "#endif /* !YY_HEADER_NO_UNDEFS */\n");
		fprintf (header_out, "\n");
		fprintf (header_out, "#undef %sIN_HEADER\n", prefix);
		fprintf (header_out, "#endif /* %sHEADER_H */\n", prefix);

		if (ferror (header_out))
			lerr (_("error creating header file %s"),
				headerfilename);
		fflush (header_out);
		fclose (header_out);
#endif

	if (exit_status != 0 && outfile_created) {
		if (ferror (stdout))
			lerr (_("error writing output file %s"),
				outfilename);

		else if ((_stdout_closed = 1) && fclose (stdout))
			lerr (_("error closing output file %s"),
				outfilename);

		else if (unlink (outfilename))
			lerr (_("error deleting output file %s"),
				outfilename);
	}


	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))
			lerr (_("error writing backup file %s"),
				backing_name);

		else if (fclose (backing_up_file))
			lerr (_("error closing backup file %s"),
				backing_name);
	}

	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 (sf_case_ins())
			putc ('i', stderr);
		if (lex_compat)
			putc ('l', stderr);
		if (posix_compat)
			putc ('X', stderr);
		if (performance_report > 0)
			putc ('p', stderr);
		if (performance_report > 1)
			putc ('p', stderr);
		if (spprdflt)
			putc ('s', stderr);
		if (reentrant)
			fputs ("--reentrant", stderr);
        if (bison_bridge_lval)
            fputs ("--bison-bridge", stderr);
        if (bison_bridge_lloc)
            fputs ("--bison-locations", stderr);
		if (use_stdout)
			putc ('t', stderr);
		if (printstats)
			putc ('v', stderr);	/* always true! */
		if (nowarn)
			putc ('w', stderr);
		if (interactive == false)
			putc ('B', stderr);
		if (interactive == true)
			putc ('I', stderr);
		if (!gen_line_dirs)
			putc ('L', stderr);
		if (trace)
			putc ('T', stderr);

		if (csize == unspecified)
			/* We encountered an error fairly early on, so csize
			 * never got specified.  Define it now, to prevent
			 * bogus table sizes being written out below.
			 */
			csize = 256;

		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 (did_outfilename)
			fprintf (stderr, " -o%s", outfilename);

		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);
	}

	FLEX_EXIT (exit_status);
}


/* flexinit - initialize flex */

void flexinit (int argc, char **argv)
{
	int     i, sawcmpflag, rv, optind;
	char   *arg;
	scanopt_t sopt;

	printstats = syntaxerror = trace = spprdflt = false;
	lex_compat = posix_compat = C_plus_plus = backing_up_report =
		ddebug = fulltbl = false;
	fullspd = long_align = nowarn = yymore_used = continued_action =
		false;
	do_yylineno = yytext_is_array = in_rule = reject = do_stdinit =
		false;
	yymore_really_used = reject_really_used = unspecified;
	interactive = csize = unspecified;
	do_yywrap = gen_line_dirs = usemecs = useecs = true;
	reentrant = bison_bridge_lval = bison_bridge_lloc = false;
	performance_report = 0;
	did_outfilename = 0;
	prefix = "yy";
	yyclass = 0;
	use_read = use_stdout = false;
	tablesext = tablesverify = false;
	gentables = true;
	tablesfilename = tablesname = NULL;
    ansi_func_defs = ansi_func_protos = true;

	sawcmpflag = 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';

	/* Initialize any buffers. */
	buf_init (&userdef_buf, sizeof (char));	/* one long string */
	buf_init (&defs_buf, sizeof (char *));	/* list of strings */
	buf_init (&yydmap_buf, sizeof (char));	/* one long string */
	buf_init (&top_buf, sizeof (char));	    /* one long string */

    {
        const char * m4defs_init_str[] = {"m4_changequote\n",
                                          "m4_changequote([[, ]])\n"};
        buf_init (&m4defs_buf, sizeof (char *));
        buf_append (&m4defs_buf, &m4defs_init_str, 2);
    }

    sf_init ();

    /* initialize regex lib */
    flex_init_regex();

	/* Enable C++ if program name ends with '+'. */
	program_name = basename (argv[0]);

	if (program_name != NULL &&
	    program_name[strlen (program_name) - 1] == '+')
		C_plus_plus = true;

	/* read flags */
	sopt = scanopt_init (flexopts, argc, argv, 0);
	if (!sopt) {
		/* This will only happen when flexopts array is altered. */
		fprintf (stderr,
			 _("Internal error. flexopts are malformed.\n"));
		FLEX_EXIT (1);
	}

	while ((rv = scanopt (sopt, &arg, &optind)) != 0) {

		if (rv < 0) {
			/* Scanopt has already printed an option-specific error message. */
			fprintf (stderr,
				 _
				 ("Try `%s --help' for more information.\n"),
				 program_name);
			FLEX_EXIT (1);
		}

		switch ((enum flexopt_flag_t) rv) {
		case OPT_CPLUSPLUS:
			C_plus_plus = true;
			break;

		case OPT_BATCH:
			interactive = false;
			break;

		case OPT_BACKUP:
			backing_up_report = true;
			break;

		case OPT_DONOTHING:
			break;

		case OPT_COMPRESSION:
			if (!sawcmpflag) {
				useecs = false;
				usemecs = false;
				fulltbl = false;
				sawcmpflag = true;
			}

			for (i = 0; arg && 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:
					lerr (_
						("unknown -C option '%c'"),
						arg[i]);
					break;
				}
			break;

		case OPT_DEBUG:
			ddebug = true;
			break;

		case OPT_NO_DEBUG:
			ddebug = false;
			break;

		case OPT_FULL:
			useecs = usemecs = false;
			use_read = fulltbl = true;
			break;

		case OPT_FAST:
			useecs = usemecs = false;
			use_read = fullspd = true;
			break;

		case OPT_HELP:
			usage ();
			FLEX_EXIT (0);

		case OPT_INTERACTIVE:
			interactive = true;
			break;

		case OPT_CASE_INSENSITIVE:
			sf_set_case_ins(true);
			break;

		case OPT_LEX_COMPAT:
			lex_compat = true;
			break;

		case OPT_POSIX_COMPAT:
			posix_compat = true;
			break;

        case OPT_PREPROC_LEVEL:
            preproc_level = strtol(arg,NULL,0);
            break;

		case OPT_MAIN:
			buf_strdefine (&userdef_buf, "YY_MAIN", "1");
			do_yywrap = false;
			break;

		case OPT_NO_MAIN:
			buf_strdefine (&userdef_buf, "YY_MAIN", "0");
			break;

		case OPT_NO_LINE:
			gen_line_dirs = false;
			break;

		case OPT_OUTFILE:
			outfilename = arg;
			did_outfilename = 1;
			break;

		case OPT_PREFIX:
			prefix = arg;
			break;

		case OPT_PERF_REPORT:
			++performance_report;
			break;

		case OPT_BISON_BRIDGE:
			bison_bridge_lval = true;
			break;

		case OPT_BISON_BRIDGE_LOCATIONS:
			bison_bridge_lval = bison_bridge_lloc = true;
			break;

		case OPT_REENTRANT:
			reentrant = true;
			break;

		case OPT_NO_REENTRANT:
			reentrant = false;
			break;

		case OPT_SKEL:
			skelname = arg;
			break;

		case OPT_DEFAULT:
			spprdflt = false;
			break;

		case OPT_NO_DEFAULT:
			spprdflt = true;
			break;

		case OPT_STDOUT:
			use_stdout = true;
			break;

		case OPT_NO_UNISTD_H:
			//buf_strdefine (&userdef_buf, "YY_NO_UNISTD_H", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_UNISTD_H",0);
			break;

		case OPT_TABLES_FILE:
			tablesext = true;
			tablesfilename = arg;
			break;

		case OPT_TABLES_VERIFY:
			tablesverify = true;
			break;

		case OPT_TRACE:
			trace = true;
			break;

		case OPT_VERBOSE:
			printstats = true;
			break;

		case OPT_VERSION:
			printf (_("%s %s\n"), program_name, flex_version);
			FLEX_EXIT (0);

		case OPT_WARN:
			nowarn = false;
			break;

		case OPT_NO_WARN:
			nowarn = true;
			break;

		case OPT_7BIT:
			csize = 128;
			break;

		case OPT_8BIT:
			csize = CSIZE;
			break;

		case OPT_ALIGN:
			long_align = true;
			break;

		case OPT_NO_ALIGN:
			long_align = false;
			break;

		case OPT_ALWAYS_INTERACTIVE:
			buf_m4_define (&m4defs_buf, "M4_YY_ALWAYS_INTERACTIVE", 0);
			break;

		case OPT_NEVER_INTERACTIVE:
            buf_m4_define( &m4defs_buf, "M4_YY_NEVER_INTERACTIVE", 0);
			break;

		case OPT_ARRAY:
			yytext_is_array = true;
			break;

		case OPT_POINTER:
			yytext_is_array = false;
			break;

		case OPT_ECS:
			useecs = true;
			break;

		case OPT_NO_ECS:
			useecs = false;
			break;

		case OPT_HEADER_FILE:
			headerfilename = arg;
			break;

		case OPT_META_ECS:
			usemecs = true;
			break;

		case OPT_NO_META_ECS:
			usemecs = false;
			break;

		case OPT_PREPROCDEFINE:
			{
				/* arg is "symbol" or "symbol=definition". */
				char   *def;

				for (def = arg;
				     *def != '\0' && *def != '='; ++def) ;

				buf_strappend (&userdef_buf, "#define ");
				if (*def == '\0') {
					buf_strappend (&userdef_buf, arg);
					buf_strappend (&userdef_buf,
						       " 1\n");
				}
				else {
					buf_strnappend (&userdef_buf, arg,
							def - arg);
					buf_strappend (&userdef_buf, " ");
					buf_strappend (&userdef_buf,
						       def + 1);
					buf_strappend (&userdef_buf, "\n");
				}
			}
			break;

		case OPT_READ:
			use_read = true;
			break;

		case OPT_STACK:
			//buf_strdefine (&userdef_buf, "YY_STACK_USED", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_STACK_USED",0);
			break;

		case OPT_STDINIT:
			do_stdinit = true;
			break;

		case OPT_NO_STDINIT:
			do_stdinit = false;
			break;

		case OPT_YYCLASS:
			yyclass = arg;
			break;

		case OPT_YYLINENO:
			do_yylineno = true;
			break;

		case OPT_NO_YYLINENO:
			do_yylineno = false;
			break;

		case OPT_YYWRAP:
			do_yywrap = true;
			break;

		case OPT_NO_YYWRAP:
			do_yywrap = false;
			break;

		case OPT_YYMORE:
			yymore_really_used = true;
			break;

		case OPT_NO_YYMORE:
			yymore_really_used = false;
			break;

		case OPT_REJECT:
			reject_really_used = true;
			break;

		case OPT_NO_REJECT:
			reject_really_used = false;
			break;

        case OPT_NO_ANSI_FUNC_DEFS:
            ansi_func_defs = false;
            break;

        case OPT_NO_ANSI_FUNC_PROTOS:
            ansi_func_protos = false;
            break;

		case OPT_NO_YY_PUSH_STATE:
			//buf_strdefine (&userdef_buf, "YY_NO_PUSH_STATE", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_PUSH_STATE",0);
			break;
		case OPT_NO_YY_POP_STATE:
			//buf_strdefine (&userdef_buf, "YY_NO_POP_STATE", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_POP_STATE",0);
			break;
		case OPT_NO_YY_TOP_STATE:
			//buf_strdefine (&userdef_buf, "YY_NO_TOP_STATE", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_TOP_STATE",0);
			break;
		case OPT_NO_UNPUT:
			//buf_strdefine (&userdef_buf, "YY_NO_UNPUT", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_UNPUT",0);
			break;
		case OPT_NO_YY_SCAN_BUFFER:
			//buf_strdefine (&userdef_buf, "YY_NO_SCAN_BUFFER", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SCAN_BUFFER",0);
			break;
		case OPT_NO_YY_SCAN_BYTES:
			//buf_strdefine (&userdef_buf, "YY_NO_SCAN_BYTES", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SCAN_BYTES",0);
			break;
		case OPT_NO_YY_SCAN_STRING:
			//buf_strdefine (&userdef_buf, "YY_NO_SCAN_STRING", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SCAN_STRING",0);
			break;
		case OPT_NO_YYGET_EXTRA:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_EXTRA", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_EXTRA",0);
			break;
		case OPT_NO_YYSET_EXTRA:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_EXTRA", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_EXTRA",0);
			break;
		case OPT_NO_YYGET_LENG:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_LENG", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_LENG",0);
			break;
		case OPT_NO_YYGET_TEXT:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_TEXT", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_TEXT",0);
			break;
		case OPT_NO_YYGET_LINENO:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_LINENO", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_LINENO",0);
			break;
		case OPT_NO_YYSET_LINENO:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_LINENO", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_LINENO",0);
			break;
		case OPT_NO_YYGET_IN:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_IN", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_IN",0);
			break;
		case OPT_NO_YYSET_IN:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_IN", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_IN",0);
			break;
		case OPT_NO_YYGET_OUT:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_OUT", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_OUT",0);
			break;
		case OPT_NO_YYSET_OUT:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_OUT", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_OUT",0);
			break;
		case OPT_NO_YYGET_LVAL:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_LVAL", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_LVAL",0);
			break;
		case OPT_NO_YYSET_LVAL:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_LVAL", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_LVAL",0);
			break;
		case OPT_NO_YYGET_LLOC:
			//buf_strdefine (&userdef_buf, "YY_NO_GET_LLOC", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_GET_LLOC",0);
			break;
		case OPT_NO_YYSET_LLOC:
			//buf_strdefine (&userdef_buf, "YY_NO_SET_LLOC", "1");
            buf_m4_define( &m4defs_buf, "M4_YY_NO_SET_LLOC",0);
			break;
		case OPT_HEX:
			trace_hex = 1;
		}		/* switch */
	}			/* while scanopt() */

	scanopt_destroy (sopt);

	num_input_files = argc - optind;
	input_files = argv + optind;
	set_input_file (num_input_files > 0 ? input_files[0] : NULL);

	lastccl = lastsc = 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;

	set_up_initial_allocations ();
}


/* readin - read in the rules section of the input file(s) */

void readin (void)
{
	static char yy_stdinit[] = "FILE *yyin = stdin, *yyout = stdout;";
	static char yy_nostdinit[] =
		"FILE *yyin = NULL, *yyout = NULL;";

	line_directive_out(NULL, 1);

	if (yyparse ()) {
		pinpoint_message (_("fatal parse error"));
		flexend (1);
	}

	if (syntaxerror)
		flexend (1);

	/* If the user explicitly requested posix compatibility by specifing the
	 * posix-compat option, then we check for conflicting options. However, if
	 * the POSIXLY_CORRECT variable is set, then we quietly make flex as
	 * posix-compatible as possible.  This is the recommended behavior
	 * according to the GNU Coding Standards.
	 *
	 * Note: The posix option was added to flex to provide the posix behavior
	 * of the repeat operator in regular expressions, e.g., `ab{3}'
	 */
	if (posix_compat) {
		/* TODO: This is where we try to make flex behave according to
		 * posiz, AND check for conflicting options. How far should we go
		 * with this? Should we disable all the neat-o flex features?
		 */
		/* Update: Estes says no, since other flex features don't violate posix. */
	}

	if (getenv ("POSIXLY_CORRECT")) {
		posix_compat = true;
	}

	if (backing_up_report) {
		backing_up_file = fopen (backing_name, "w");
		if (backing_up_file == NULL)
			lerr (_
				("could not create backing-up info file %s"),
				backing_name);
	}

	else
		backing_up_file = NULL;

	if (yymore_really_used == true)
		yymore_used = true;
	else if (yymore_really_used == false)
		yymore_used = false;

	if (reject_really_used == true)
		reject = true;
	else if (reject_really_used == false)
		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"));
		}

		else if (do_yylineno) {
			fprintf (stderr,
				 _
				 ("%%option yylineno entails a performance penalty ONLY on rules that can match newline characters\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 if (do_yylineno)
			flexerror (_
				   ("%option yylineno cannot be used with REJECT"));
		else
			flexerror (_
				   ("variable trailing context rules cannot be used with -f or -F"));
	}

	if (reject){
        out_m4_define( "M4_YY_USES_REJECT", NULL);
		//outn ("\n#define YY_USES_REJECT");
    }

	if (!do_yywrap) {
		if (!C_plus_plus) {
			 if (reentrant)
				outn ("\n#define yywrap(yyscanner) (/*CONSTCOND*/1)");
			 else
				outn ("\n#define yywrap() (/*CONSTCOND*/1)");
		}
		outn ("#define YY_SKIP_YYWRAP");
	}

	if (ddebug)
		outn ("\n#define FLEX_DEBUG");

	OUT_BEGIN_CODE ();
	if (csize == 256)
		outn ("typedef unsigned char YY_CHAR;");
	else
		outn ("typedef char YY_CHAR;");
	OUT_END_CODE ();

	if (C_plus_plus) {
		outn ("#define yytext_ptr yytext");

		if (interactive)
			outn ("#define YY_INTERACTIVE");
	}

	else {
		OUT_BEGIN_CODE ();
		/* In reentrant scanner, stdinit is handled in flex.skl. */
		if (do_stdinit) {
			if (reentrant){
                outn ("#ifdef VMS");
                outn ("#ifdef __VMS_POSIX");
                outn ("#define YY_STDINIT");
                outn ("#endif");
                outn ("#else");
                outn ("#define YY_STDINIT");
                outn ("#endif");
            }

			outn ("#ifdef VMS");
			outn ("#ifndef __VMS_POSIX");
			outn (yy_nostdinit);
			outn ("#else");
			outn (yy_stdinit);
			outn ("#endif");
			outn ("#else");
			outn (yy_stdinit);
			outn ("#endif");
		}

		else {
			if(!reentrant)
                outn (yy_nostdinit);
		}
		OUT_END_CODE ();
	}

	OUT_BEGIN_CODE ();
	if (fullspd)
		outn ("typedef yyconst struct yy_trans_info *yy_state_type;");
	else if (!C_plus_plus)
		outn ("typedef int yy_state_type;");
	OUT_END_CODE ();

	if (lex_compat)
		outn ("#define YY_FLEX_LEX_COMPAT");

	if (!C_plus_plus && !reentrant) {
		outn ("extern int yylineno;");
		OUT_BEGIN_CODE ();
		outn ("int yylineno = 1;");
		OUT_END_CODE ();
	}

	if (C_plus_plus) {
		outn ("\n#include <FlexLexer.h>");

 		if (!do_yywrap) {
			outn("\nint yyFlexLexer::yywrap() { return 1; }");
		}

		if (yyclass) {
			outn ("int yyFlexLexer::yylex()");
			outn ("\t{");
			outn ("\tLexerError( \"yyFlexLexer::yylex invoked but %option yyclass used\" );");
			outn ("\treturn 0;");
			outn ("\t}");

			out_str ("\n#define YY_DECL int %s::yylex()\n",
				 yyclass);
		}
	}

	else {

		/* Watch out: yytext_ptr is a variable when yytext is an array,
		 * but it's a macro when yytext is a pointer.
		 */
		if (yytext_is_array) {
			if (!reentrant)
				outn ("extern char yytext[];\n");
		}
		else {
			if (reentrant) {
				outn ("#define yytext_ptr yytext_r");
			}
			else {
				outn ("extern char *yytext;");

				outn("#ifdef yytext_ptr");
				outn("#undef yytext_ptr");
				outn("#endif");
				outn ("#define yytext_ptr yytext");
			}
		}

		if (yyclass)
			flexerror (_
				   ("%option yyclass only meaningful for C++ scanners"));
	}

	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 (void)
{
	maximum_mns = (long_align ? MAXIMUM_MNS_LONG : MAXIMUM_MNS);
	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);
	rule_has_nl = allocate_bool_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);

	current_maxccls = INITIAL_MAX_CCLS;
	cclmap = allocate_integer_array (current_maxccls);
	ccllen = allocate_integer_array (current_maxccls);
	cclng = allocate_integer_array (current_maxccls);
	ccl_has_nl = allocate_bool_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 = NULL;
}


void usage (void)
{
	FILE   *f = stdout;

	if (!did_outfilename) {
		snprintf (outfile_path, sizeof(outfile_path), outfile_template,
			 prefix, C_plus_plus ? "cc" : "c");
		outfilename = outfile_path;
	}

	fprintf (f, _("Usage: %s [OPTIONS] [FILE]...\n"), program_name);
	fprintf (f,
		 _
		 ("Generates programs that perform pattern-matching on text.\n"
		  "\n" "Table Compression:\n"
		  "  -Ca, --align      trade off larger tables for better memory alignment\n"
		  "  -Ce, --ecs        construct equivalence classes\n"
		  "  -Cf               do not compress tables; use -f representation\n"
		  "  -CF               do not compress tables; use -F representation\n"
		  "  -Cm, --meta-ecs   construct meta-equivalence classes\n"
		  "  -Cr, --read       use read() instead of stdio for scanner input\n"
		  "  -f, --full        generate fast, large scanner. Same as -Cfr\n"
		  "  -F, --fast        use alternate table representation. Same as -CFr\n"
		  "  -Cem              default compression (same as --ecs --meta-ecs)\n"
		  "\n" "Debugging:\n"
		  "  -d, --debug             enable debug mode in scanner\n"
		  "  -b, --backup            write backing-up information to %s\n"
		  "  -p, --perf-report       write performance report to stderr\n"
		  "  -s, --nodefault         suppress default rule to ECHO unmatched text\n"
		  "  -T, --trace             %s should run in trace mode\n"
		  "  -w, --nowarn            do not generate warnings\n"
		  "  -v, --verbose           write summary of scanner statistics to stdout\n"
		  "      --hex               use hexadecimal numbers instead of octal in debug outputs\n"
		  "\n" "Files:\n"
		  "  -o, --outfile=FILE      specify output filename\n"
		  "  -S, --skel=FILE         specify skeleton file\n"
		  "  -t, --stdout            write scanner on stdout instead of %s\n"
		  "      --yyclass=NAME      name of C++ class\n"
		  "      --header-file=FILE   create a C header file in addition to the scanner\n"
		  "      --tables-file[=FILE] write tables to FILE\n" "\n"
		  "Scanner behavior:\n"
		  "  -7, --7bit              generate 7-bit scanner\n"
		  "  -8, --8bit              generate 8-bit scanner\n"
		  "  -B, --batch             generate batch scanner (opposite of -I)\n"
		  "  -i, --case-insensitive  ignore case in patterns\n"
		  "  -l, --lex-compat        maximal compatibility with original lex\n"
		  "  -X, --posix-compat      maximal compatibility with POSIX lex\n"
		  "  -I, --interactive       generate interactive scanner (opposite of -B)\n"
		  "      --yylineno          track line count in yylineno\n"
		  "\n" "Generated code:\n"
		  "  -+,  --c++               generate C++ scanner class\n"
		  "  -Dmacro[=defn]           #define macro defn  (default defn is '1')\n"
		  "  -L,  --noline            suppress #line directives in scanner\n"
		  "  -P,  --prefix=STRING     use STRING as prefix instead of \"yy\"\n"
		  "  -R,  --reentrant         generate a reentrant C scanner\n"
		  "       --bison-bridge      scanner for bison pure parser.\n"
		  "       --bison-locations   include yylloc support.\n"
		  "       --stdinit           initialize yyin/yyout to stdin/stdout\n"
          "       --noansi-definitions old-style function definitions\n"
          "       --noansi-prototypes  empty parameter list in prototypes\n"
		  "       --nounistd          do not include <unistd.h>\n"
		  "       --noFUNCTION        do not generate a particular FUNCTION\n"
		  "\n" "Miscellaneous:\n"
		  "  -c                      do-nothing POSIX option\n"
		  "  -n                      do-nothing POSIX option\n"
		  "  -?\n"
		  "  -h, --help              produce this help message\n"
		  "  -V, --version           report %s version\n"),
		 backing_name, program_name, outfile_path, program_name);

}
