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/* 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 */
bool syntaxerror, eofseen;
int yymore_used, reject, real_reject, continued_action, in_rule;
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;
char *extra_type = NULL;
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;
int current_state_type;
bool 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[] and sceof[] are boolean arrays, but allocated as char
* arrays for size. */
char *scxclu, *sceof;
int current_max_scs;
const 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, nmval;
int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave;
int num_backing_up, bol_needed;
int end_of_buffer_state;
char **input_files;
int num_input_files;
jmp_buf flex_main_jmp_buf;
/* rule_useful[], rule_has_nl[] and ccl_has_nl[] are boolean arrays,
* but allocated as char arrays for size. */
char *rule_useful, *rule_has_nl, *ccl_has_nl;
int nlch = '\n';
bool tablesext, tablesverify, gentables;
char *tablesfilename=0,*tablesname=0;
struct yytbl_writer tableswr;
size_t footprint;
struct ctrl_bundle_t ctrl;
struct env_bundle_t env;
/* 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 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;
int did_eof_rule = false;
/* 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 (true); /* %% [1.0] DFA */
footprint += 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 (ctrl.spprdflt && !reject && rule_useful[default_rule])
line_warning (_
("-s option given but default rule can be matched"),
rule_linenum[default_rule]);
comment("START of m4 controls\n");
// mode switches for yy_trans_info specification
// nultrans
if (nultrans)
visible_define ( "M4_MODE_NULTRANS");
else {
visible_define ( "M4_MODE_NO_NULTRANS");
if (ctrl.fulltbl)
visible_define ( "M4_MODE_NULTRANS_FULLTBL");
else
visible_define ( "M4_MODE_NO_NULTRANS_FULLTBL");
if (ctrl.fullspd)
visible_define ( "M4_MODE_NULTRANS_FULLSPD");
else
visible_define ( "M4_MODE_NO_NULTRANS_FULLSPD");
}
comment("END of m4 controls\n");
out ("\n");
comment("START of Flex-generated definitions\n");
out_str_dec ("M4_HOOK_CONST_DEFINE_UINT(%s, %d)", "YY_NUM_RULES", num_rules);
out_str_dec ("M4_HOOK_CONST_DEFINE_STATE(%s, %d)", "YY_END_OF_BUFFER", num_rules + 1);
out_str_dec ("M4_HOOK_CONST_DEFINE_STATE(%s, %d)", "YY_JAMBASE", jambase);
out_str_dec ("M4_HOOK_CONST_DEFINE_STATE(%s, %d)", "YY_JAMSTATE", jamstate);
out_str_dec ("M4_HOOK_CONST_DEFINE_BYTE(%s, %d)", "YY_NUL_EC", NUL_ec);
/* Need to define the transet type as a size large
* enough to hold the biggest offset.
*/
out_str ("M4_HOOK_SET_OFFSET_TYPE(%s)", optimize_pack(tblend + numecs + 1)->name);
comment("END of Flex-generated definitions\n");
skelout (true); /* %% [2.0] - tables get dumped here */
/* Generate the C state transition tables from the DFA. */
make_tables ();
skelout (true); /* %% [3.0] - mode-dependent static declarations get dumped here */
out (&action_array[defs1_offset]);
line_directive_out (stdout, NULL, linenum);
skelout (true); /* %% [4.0] - various random yylex internals get dumped here */
/* Copy prolog to output file. */
out (&action_array[prolog_offset]);
line_directive_out (stdout, NULL, linenum);
skelout (true); /* %% [5.0] - main loop of matching-engine code gets dumped here */
/* Copy actions to output file. */
out (&action_array[action_offset]);
line_directive_out (stdout, NULL, linenum);
/* generate cases for any missing EOF rules */
for (i = 1; i <= lastsc; ++i)
if (!sceof[i]) {
out_str ("M4_HOOK_EOF_STATE_CASE_ARM(%s)", scname[i]);
outc('\n');
out ("M4_HOOK_EOF_STATE_CASE_FALLTHROUGH");
outc('\n');
did_eof_rule = true;
}
if (did_eof_rule) {
out ("M4_HOOK_EOF_STATE_CASE_TERMINATE");
}
skelout (true);
/* Copy remainder of input to output. */
line_directive_out (stdout, infilename, linenum);
if (sectnum == 3) {
OUT_BEGIN_CODE ();
if (!ctrl.no_section3_escape)
fputs("[[", stdout);
(void) flexscan (); /* copy remainder of input to output */
if (!ctrl.no_section3_escape)
fputs("]]", stdout);
OUT_END_CODE ();
}
/* 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 defined(ENABLE_NLS) && ENABLE_NLS
#if HAVE_LOCALE_H
setlocale (LC_MESSAGES, "");
setlocale (LC_CTYPE, "");
textdomain (PACKAGE);
bindtextdomain (PACKAGE, LOCALEDIR);
#endif
#endif
return flex_main (argc, argv);
}
/* Set up the output filter chain. */
void initialize_output_filters(void)
{
const char * m4 = NULL;
output_chain = filter_create_int(NULL, filter_tee_header, env.headerfilename);
if ( !(m4 = getenv("M4"))) {
m4 = M4;
}
filter_create_ext(output_chain, m4, "-P", (char *) 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);
}
}
/* check_options - check user-specified options */
void check_options (void)
{
int i;
if (ctrl.lex_compat) {
if (ctrl.C_plus_plus)
flexerror (_("Can't use -+ with -l option"));
if (ctrl.fulltbl || ctrl.fullspd)
flexerror (_("Can't use -f or -F with -l option"));
if (ctrl.reentrant || ctrl.bison_bridge_lval)
flexerror (_
("Can't use --ctrl.reentrant or --bison-bridge with -l option"));
ctrl.yytext_is_array = true;
ctrl.do_yylineno = true;
ctrl.use_read = false;
}
#if 0
/* This makes no sense whatsoever. I'm removing it. */
if (ctrl.do_yylineno)
/* This should really be "maintain_backup_tables = true" */
ctrl.reject_really_used = true;
#endif
if (ctrl.csize == trit_unspecified) {
if ((ctrl.fulltbl || ctrl.fullspd) && !ctrl.useecs)
ctrl.csize = DEFAULT_CSIZE;
else
ctrl.csize = CSIZE;
}
if (ctrl.interactive == trit_unspecified) {
if (ctrl.fulltbl || ctrl.fullspd)
ctrl.interactive = trit_false;
else
ctrl.interactive = trit_true;
}
if (ctrl.fulltbl || ctrl.fullspd) {
if (ctrl.usemecs)
flexerror (_
("-Cf/-CF and -Cm don't make sense together"));
if (ctrl.interactive != trit_false)
flexerror (_("-Cf/-CF and -I are incompatible"));
if (ctrl.lex_compat)
flexerror (_
("-Cf/-CF are incompatible with lex-compatibility mode"));
if (ctrl.fulltbl && ctrl.fullspd)
flexerror (_
("-Cf and -CF are mutually exclusive"));
}
if (ctrl.C_plus_plus && ctrl.fullspd)
flexerror (_("Can't use -+ with -CF option"));
if (ctrl.C_plus_plus && ctrl.yytext_is_array) {
lwarn (_("%array incompatible with -+ option"));
ctrl.yytext_is_array = false;
}
if (ctrl.C_plus_plus && (ctrl.reentrant))
flexerror (_("Options -+ and --reentrant are mutually exclusive."));
if (ctrl.C_plus_plus && ctrl.bison_bridge_lval)
flexerror (_("bison bridge not supported for the C++ scanner."));
if (ctrl.useecs) { /* Set up doubly-linked equivalence classes. */
/* We loop all the way up to ctrl.csize, since ecgroup[ctrl.csize] is
* the position used for NUL characters.
*/
ecgroup[1] = NIL;
for (i = 2; i <= ctrl.csize; ++i) {
ecgroup[i] = i - 1;
nextecm[i - 1] = i;
}
nextecm[ctrl.csize] = NIL;
}
else {
/* Put everything in its own equivalence class. */
for (i = 1; i <= ctrl.csize; ++i) {
ecgroup[i] = i;
nextecm[i] = BAD_SUBSCRIPT; /* to catch errors */
}
}
if (!env.use_stdout) {
FILE *prev_stdout;
if (!env.did_outfilename) {
snprintf (outfile_path, sizeof(outfile_path), outfile_template,
ctrl.prefix, suffix());
env.outfilename = outfile_path;
}
prev_stdout = freopen (env.outfilename, "w+", stdout);
if (prev_stdout == NULL)
lerr (_("could not create %s"), env.outfilename);
outfile_created = 1;
}
}
/* 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 (ctrl.yyclass != NULL && !ctrl.C_plus_plus)
flexerror (_("%option yyclass only meaningful for C++ scanners"));
if (skelfile != NULL) {
if (ferror (skelfile))
lerr (_("input error reading skeleton file %s"),
env.skelname);
else if (fclose (skelfile))
lerr (_("error closing skeleton file %s"),
env.skelname);
}
if (exit_status != 0 && outfile_created) {
if (ferror (stdout))
lerr (_("error writing output file %s"),
env.outfilename);
else if ((_stdout_closed = 1) && fclose (stdout))
lerr (_("error closing output file %s"),
env.outfilename);
else if (unlink (env.outfilename))
lerr (_("error deleting output file %s"),
env.outfilename);
}
if (env.backing_up_report && ctrl.backing_up_file) {
if (num_backing_up == 0)
fprintf (ctrl.backing_up_file, _("No backing up.\n"));
else if (ctrl.fullspd || ctrl.fulltbl)
fprintf (ctrl.backing_up_file,
_
("%d backing up (non-accepting) states.\n"),
num_backing_up);
else
fprintf (ctrl.backing_up_file,
_("Compressed tables always back up.\n"));
if (ferror (ctrl.backing_up_file))
lerr (_("error writing backup file %s"),
backing_name);
else if (fclose (ctrl.backing_up_file))
lerr (_("error closing backup file %s"),
backing_name);
}
if (env.printstats) {
fprintf (stderr, _("%s version %s usage statistics:\n"),
program_name, flex_version);
fprintf (stderr, _(" scanner options: -"));
if (ctrl.C_plus_plus)
putc ('+', stderr);
if (env.backing_up_report)
putc ('b', stderr);
if (ctrl.ddebug)
putc ('d', stderr);
if (sf_case_ins())
putc ('i', stderr);
if (ctrl.lex_compat)
putc ('l', stderr);
if (ctrl.posix_compat)
putc ('X', stderr);
if (env.performance_hint > 0)
putc ('p', stderr);
if (env.performance_hint > 1)
putc ('p', stderr);
if (ctrl.spprdflt)
putc ('s', stderr);
if (ctrl.reentrant)
fputs ("--reentrant", stderr);
if (ctrl.bison_bridge_lval)
fputs ("--bison-bridge", stderr);
if (ctrl.bison_bridge_lloc)
fputs ("--bison-locations", stderr);
if (env.use_stdout)
putc ('t', stderr);
if (env.printstats)
putc ('v', stderr); /* always true! */
if (env.nowarn)
putc ('w', stderr);
if (ctrl.interactive == trit_false)
putc ('B', stderr);
if (ctrl.interactive == trit_true)
putc ('I', stderr);
if (!ctrl.gen_line_dirs)
putc ('L', stderr);
if (env.trace)
putc ('T', stderr);
if (ctrl.csize == trit_unspecified)
/* We encountered an error fairly early on, so ctrl.csize
* never got specified. Define it now, to prevent
* bogus table sizes being written out below.
*/
ctrl.csize = 256;
if (ctrl.csize == 128)
putc ('7', stderr);
else
putc ('8', stderr);
fprintf (stderr, " -C");
if (ctrl.long_align)
putc ('a', stderr);
if (ctrl.fulltbl)
putc ('f', stderr);
if (ctrl.fullspd)
putc ('F', stderr);
if (ctrl.useecs)
putc ('e', stderr);
if (ctrl.usemecs)
putc ('m', stderr);
if (ctrl.use_read)
putc ('r', stderr);
if (env.did_outfilename)
fprintf (stderr, " -o%s", env.outfilename);
if (env.skelname != NULL)
fprintf (stderr, " -S%s", env.skelname);
if (strcmp (ctrl.prefix, "yy"))
fprintf (stderr, " -P%s", ctrl.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 (ctrl.fullspd || ctrl.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 (ctrl.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 (ctrl.useecs) {
tblsiz = tblsiz + ctrl.csize;
fprintf (stderr,
_
(" %d/%d equivalence classes created\n"),
numecs, ctrl.csize);
}
if (ctrl.usemecs) {
tblsiz = tblsiz + numecs;
fprintf (stderr,
_
(" %d/%d meta-equivalence classes created\n"),
nummecs, ctrl.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;
memset(&ctrl, '\0', sizeof(ctrl));
syntaxerror = false;
yymore_used = continued_action = false;
in_rule = reject = false;
ctrl.yymore_really_used = ctrl.reject_really_used = trit_unspecified;
ctrl.do_main = trit_unspecified;
ctrl.interactive = ctrl.csize = trit_unspecified;
ctrl.do_yywrap = ctrl.gen_line_dirs = ctrl.usemecs = ctrl.useecs = true;
ctrl.reentrant = ctrl.bison_bridge_lval = ctrl.bison_bridge_lloc = false;
env.performance_hint = 0;
ctrl.prefix = "yy";
ctrl.rewrite = false;
ctrl.yylmax = BUFSIZ;
tablesext = tablesverify = false;
gentables = true;
tablesfilename = tablesname = NULL;
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 (&top_buf, sizeof (char)); /* one long string */
sf_init ();
/* Enable C++ if program name ends with '+'. */
program_name = argv[0];
if (program_name != NULL &&
program_name[strlen (program_name) - 1] == '+')
ctrl.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:
ctrl.C_plus_plus = true;
break;
case OPT_BATCH:
ctrl.interactive = trit_false;
break;
case OPT_BACKUP:
env.backing_up_report = trit_true;
break;
case OPT_BACKUP_FILE:
env.backing_up_report = true;
backing_name = arg;
break;
case OPT_DONOTHING:
break;
case OPT_COMPRESSION:
if (!sawcmpflag) {
ctrl.useecs = false;
ctrl.usemecs = false;
ctrl.fulltbl = false;
sawcmpflag = true;
}
for (i = 0; arg && arg[i] != '\0'; i++)
switch (arg[i]) {
case 'a':
ctrl.long_align = true;
break;
case 'e':
ctrl.useecs = true;
break;
case 'F':
ctrl.fullspd = true;
break;
case 'f':
ctrl.fulltbl = true;
break;
case 'm':
ctrl.usemecs = true;
break;
case 'r':
ctrl.use_read = true;
break;
default:
lerr (_
("unknown -C option '%c'"),
arg[i]);
break;
}
break;
case OPT_DEBUG:
ctrl.ddebug = true;
break;
case OPT_NO_DEBUG:
ctrl.ddebug = false;
break;
case OPT_FULL:
ctrl.useecs = ctrl.usemecs = false;
ctrl.use_read = ctrl.fulltbl = true;
break;
case OPT_FAST:
ctrl.useecs = ctrl.usemecs = false;
ctrl.use_read = ctrl.fullspd = true;
break;
case OPT_HELP:
usage ();
FLEX_EXIT (0);
case OPT_INTERACTIVE:
ctrl.interactive = true;
break;
case OPT_CASE_INSENSITIVE:
sf_set_case_ins(true);
break;
case OPT_LEX_COMPAT:
ctrl.lex_compat = true;
break;
case OPT_POSIX_COMPAT:
ctrl.posix_compat = true;
break;
case OPT_PREPROC_LEVEL:
preproc_level = (int) strtol(arg,NULL,0);
break;
case OPT_MAIN:
ctrl.do_yywrap = false;
ctrl.do_main = trit_true;
break;
case OPT_NO_MAIN:
ctrl.do_main = trit_false;
break;
case OPT_NO_LINE:
ctrl.gen_line_dirs = false;
break;
case OPT_OUTFILE:
env.outfilename = arg;
env.did_outfilename = 1;
break;
case OPT_PREFIX:
ctrl.prefix = arg;
break;
case OPT_PERF_REPORT:
++env.performance_hint;
break;
case OPT_BISON_BRIDGE:
ctrl.bison_bridge_lval = true;
break;
case OPT_BISON_BRIDGE_LOCATIONS:
ctrl.bison_bridge_lval = ctrl.bison_bridge_lloc = true;
break;
case OPT_REENTRANT:
ctrl.reentrant = true;
break;
case OPT_NO_REENTRANT:
ctrl.reentrant = false;
break;
case OPT_SKEL:
env.skelname = arg;
break;
case OPT_DEFAULT:
ctrl.spprdflt = false;
break;
case OPT_NO_DEFAULT:
ctrl.spprdflt = true;
break;
case OPT_STDOUT:
env.use_stdout = true;
break;
case OPT_NO_UNISTD_H:
ctrl.no_unistd = true;
break;
case OPT_TABLES_FILE:
tablesext = true;
tablesfilename = arg;
break;
case OPT_TABLES_VERIFY:
tablesverify = true;
break;
case OPT_TRACE:
env.trace = true;
break;
case OPT_VERBOSE:
env.printstats = true;
break;
case OPT_VERSION:
printf ("%s %s\n", (ctrl.C_plus_plus ? "flex++" : "flex"), flex_version);
FLEX_EXIT (0);
case OPT_WARN:
env.nowarn = false;
break;
case OPT_NO_WARN:
env.nowarn = true;
break;
case OPT_7BIT:
ctrl.csize = 128;
break;
case OPT_8BIT:
ctrl.csize = CSIZE;
break;
case OPT_ALIGN:
ctrl.long_align = true;
break;
case OPT_NO_ALIGN:
ctrl.long_align = false;
break;
case OPT_ALWAYS_INTERACTIVE:
ctrl.always_interactive = true;
break;
case OPT_NEVER_INTERACTIVE:
ctrl.never_interactive = true;
break;
case OPT_ARRAY:
ctrl.yytext_is_array = true;
break;
case OPT_POINTER:
ctrl.yytext_is_array = false;
break;
case OPT_ECS:
ctrl.useecs = true;
break;
case OPT_NO_ECS:
ctrl.useecs = false;
break;
case OPT_EMIT:
ctrl.emit = arg;
break;
case OPT_HEADER_FILE:
env.headerfilename = arg;
break;
case OPT_META_ECS:
ctrl.usemecs = true;
break;
case OPT_NO_META_ECS:
ctrl.usemecs = false;
break;
case OPT_PREPROCDEFINE:
{
/* arg is "symbol" or "symbol=definition". */
char *def;
char buf2[4096];
for (def = arg;
*def != '\0' && *def != '='; ++def)
continue;
if (*def == '\0')
def = "1";
snprintf(buf2, sizeof(buf2), "M4_HOOK_CONST_DEFINE_UNKNOWN(%s, %s)", arg, def);
buf_strappend (&userdef_buf, buf2);
}
break;
case OPT_READ:
ctrl.use_read = true;
break;
case OPT_STACK:
ctrl.stack_used = true;
break;
case OPT_STDINIT:
ctrl.do_stdinit = true;
break;
case OPT_NO_STDINIT:
ctrl.do_stdinit = false;
break;
case OPT_YYCLASS:
ctrl.yyclass = arg;
break;
case OPT_YYLINENO:
ctrl.do_yylineno = true;
break;
case OPT_NO_YYLINENO:
ctrl.do_yylineno = false;
break;
case OPT_YYWRAP:
ctrl.do_yywrap = true;
break;
case OPT_NO_YYWRAP:
ctrl.do_yywrap = false;
break;
case OPT_YYMORE:
ctrl.yymore_really_used = true;
break;
case OPT_NO_YYMORE:
ctrl.yymore_really_used = false;
break;
case OPT_REJECT:
ctrl.reject_really_used = true;
break;
case OPT_NO_REJECT:
ctrl.reject_really_used = false;
break;
case OPT_NO_YY_PUSH_STATE:
ctrl.no_yy_push_state = true;
break;
case OPT_NO_YY_POP_STATE:
ctrl.no_yy_pop_state = true;
break;
case OPT_NO_YY_TOP_STATE:
ctrl.no_yy_top_state = true;
break;
case OPT_NO_YYINPUT:
ctrl.no_yyinput = true;
break;
case OPT_NO_YYUNPUT:
ctrl.no_yyunput = true;
break;
case OPT_NO_YY_SCAN_BUFFER:
ctrl.no_yy_scan_buffer = true;
break;
case OPT_NO_YY_SCAN_BYTES:
ctrl.no_yy_scan_bytes = true;
break;
case OPT_NO_YY_SCAN_STRING:
ctrl.no_yy_scan_string = true;
break;
case OPT_NO_YYGET_EXTRA:
ctrl.no_yyget_extra = true;
break;
case OPT_NO_YYSET_EXTRA:
ctrl.no_yyset_extra = true;
break;
case OPT_NO_YYGET_LENG:
ctrl.no_yyget_leng = true;
break;
case OPT_NO_YYGET_TEXT:
ctrl.no_yyget_text = true;
break;
case OPT_NO_YYGET_LINENO:
ctrl.no_yyget_lineno = true;
break;
case OPT_NO_YYSET_LINENO:
ctrl.no_yyset_lineno = true;
break;
case OPT_NO_YYGET_COLUMN:
ctrl.no_yyget_column = true;
break;
case OPT_NO_YYSET_COLUMN:
ctrl.no_yyset_column = true;
break;
case OPT_NO_YYGET_IN:
ctrl.no_yyget_in = true;
break;
case OPT_NO_YYSET_IN:
ctrl.no_yyset_in = true;
break;
case OPT_NO_YYGET_OUT:
ctrl.no_yyget_out = true;
break;
case OPT_NO_YYSET_OUT:
ctrl.no_yyset_out = true;
break;
case OPT_NO_YYGET_LVAL:
ctrl.no_yyget_lval = true;
break;
case OPT_NO_YYSET_LVAL:
ctrl.no_yyset_lval = true;
break;
case OPT_NO_YYGET_LLOC:
ctrl.no_yyget_lloc = true;
break;
case OPT_NO_YYSET_LLOC:
ctrl.no_yyset_lloc = true;
break;
case OPT_NO_YYGET_DEBUG:
ctrl.no_get_debug = true;
break;
case OPT_NO_YYSET_DEBUG:
ctrl.no_set_debug = true;
break;
case OPT_HEX:
env.trace_hex = true;
break;
case OPT_NO_SECT3_ESCAPE:
ctrl.no_section3_escape = true;
break;
} /* 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 = datapos = dataline = 0;
eofseen = false;
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)
{
char buf[256];
line_directive_out(NULL, infilename, linenum);
if (yyparse ()) {
pinpoint_message (_("fatal parse error"));
flexend (1);
}
if (syntaxerror)
flexend (1);
/* On --emit, -e, or change backends This is where backend
* properties are collected, which means they can't be set
* from a custom skelfile. Note: might have been called sooner
* when %option emit was evaluated; this catches command-line
* optiins and the default case.
*/
backend_by_name(ctrl.emit);
initialize_output_filters();
yyout = stdout;
if (tablesext)
gentables = false;
if (tablesverify)
/* force generation of C tables. */
gentables = true;
if (tablesext) {
FILE *tablesout;
struct yytbl_hdr hdr;
char *pname = 0;
size_t nbytes = 0;
if (!tablesfilename) {
nbytes = strlen (ctrl.prefix) + strlen (tablesfile_template) + 2;
tablesfilename = pname = calloc(nbytes, 1);
snprintf (pname, nbytes, tablesfile_template, ctrl.prefix);
}
if ((tablesout = fopen (tablesfilename, "w")) == NULL)
lerr (_("could not create %s"), tablesfilename);
free(pname);
tablesfilename = 0;
yytbl_writer_init (&tableswr, tablesout);
nbytes = strlen (ctrl.prefix) + strlen ("tables") + 2;
tablesname = calloc(nbytes, 1);
snprintf (tablesname, nbytes, "%stables", ctrl.prefix);
yytbl_hdr_init (&hdr, flex_version, tablesname);
if (yytbl_hdr_fwrite (&tableswr, &hdr) <= 0)
flexerror (_("could not write tables header"));
}
if (env.skelname && (skelfile = fopen (env.skelname, "r")) == NULL)
lerr (_("can't open skeleton file %s"), env.skelname);
if (strchr(ctrl.prefix, '[') || strchr(ctrl.prefix, ']'))
flexerror(_("Prefix cannot include '[' or ']'"));
if (env.did_outfilename)
line_directive_out (stdout, NULL, linenum);
/* This is where we begin writing to the file. */
skelout(false); /* [0.0] Make hook macros available, silently */
comment("A lexical scanner generated by flex\n");
/* Dump the %top code. */
if( top_buf.elts)
outn((char*) top_buf.elts);
/* Place a bogus line directive, it will be fixed in the filter. */
line_directive_out(NULL, NULL, 0);
/* User may want to set the scanner prototype */
if (ctrl.yydecl != NULL) {
out_str ("M4_HOOK_SET_YY_DECL(%s)\n", ctrl.yydecl);
}
if (ctrl.userinit != NULL) {
out_str ("M4_HOOK_SET_USERINIT(%s)\n", ctrl.userinit);
}
if (ctrl.preaction != NULL) {
out_str ("M4_HOOK_SET_PREACTION(%s)\n", ctrl.preaction);
}
if (ctrl.postaction != NULL) {
out_str ("M4_HOOK_SET_POSTACTION(%s)\n", ctrl.postaction);
}
/* This has to be a straight textual substitution rather
* than a constant declaration because in C a const is
* not const enough to be a static array bound.
*/
out_dec ("m4_define([[YYLMAX]], [[%d]])\n", ctrl.yylmax);
/* Dump the user defined preproc directives. */
if (userdef_buf.elts)
outn ((char *) (userdef_buf.elts));
/* If the user explicitly requested posix compatibility by specifying 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 (ctrl.posix_compat) {
/* TODO: This is where we try to make flex behave according to
* POSIX, *and* check for conflicting ctrl. 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")) {
ctrl.posix_compat = true;
}
if (env.backing_up_report) {
ctrl.backing_up_file = fopen (backing_name, "w");
if (ctrl.backing_up_file == NULL)
lerr (_
("could not create backing-up info file %s"),
backing_name);
}
else
ctrl.backing_up_file = NULL;
if (ctrl.yymore_really_used == true)
yymore_used = true;
else if (ctrl.yymore_really_used == false)
yymore_used = false;
if (ctrl.reject_really_used == true)
reject = true;
else if (ctrl.reject_really_used == false)
reject = false;
if (env.performance_hint > 0) {
if (ctrl.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 (ctrl.do_yylineno) {
fprintf (stderr,
_
("%%option yylineno entails a performance penalty ONLY on rules that can match newline characters\n"));
}
if (env.performance_hint > 1) {
if (ctrl.interactive == trit_true)
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 ((ctrl.fulltbl || ctrl.fullspd) && reject) {
if (real_reject)
flexerror (_
("REJECT cannot be used with -f or -F"));
else if (ctrl.do_yylineno)
flexerror (_
("%option yylineno cannot be used with REJECT"));
else
flexerror (_
("variable trailing context rules cannot be used with -f or -F"));
}
if (ctrl.useecs)
numecs = cre8ecs (nextecm, ecgroup, ctrl.csize);
else
numecs = ctrl.csize;
/* Now map the equivalence class for NUL to its expected place. */
ecgroup[0] = ecgroup[ctrl.csize];
NUL_ec = ABS (ecgroup[0]);
if (ctrl.useecs)
ccl2ecl ();
// These are used to conditionalize code in the lex skeleton
// that historically used to be generated by C code in flex
// itself; by shoving all this stuff out to the skeleton file
// we make it easier to retarget the code generation.
snprintf(buf, sizeof(buf), "Target: %s\n", ctrl.backend_name);
comment(buf);
comment("START of m4 controls\n");
/* Define the start condition macros. */
{
struct Buf tmpbuf;
int i;
buf_init(&tmpbuf, sizeof(char));
for (i = 1; i <= lastsc; i++) {
char *str, *fmt = "M4_HOOK_CONST_DEFINE_STATE(%s, %d)";
size_t strsz;
strsz = strlen(fmt) + strlen(scname[i]) + (size_t)(1 + ceil (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);
}
// FIXME: Not dumped visibly because we plan to do away with the indirection
out_m4_define("M4_YY_SC_DEFS", tmpbuf.elts);
buf_destroy(&tmpbuf);
}
if (ctrl.bison_bridge_lval)
visible_define("M4_YY_BISON_LVAL");
if (ctrl.bison_bridge_lloc)
visible_define("<M4_YY_BISON_LLOC>");
if (extra_type != NULL)
visible_define_str ("M4_MODE_EXTRA_TYPE", extra_type);
/* always generate the tablesverify flag. */
visible_define_str ("M4_YY_TABLES_VERIFY", tablesverify ? "1" : "0");
if (ctrl.reentrant) {
visible_define ("M4_YY_REENTRANT");
if (ctrl.yytext_is_array)
visible_define ("M4_MODE_REENTRANT_TEXT_IS_ARRAY");
}
if (ctrl.do_main == trit_true)
visible_define_str ( "YY_MAIN", "1");
else if (ctrl.do_main == trit_false)
visible_define_str ( "YY_MAIN", "0");
if (ctrl.do_stdinit)
visible_define ( "M4_MODE_DO_STDINIT");
else
visible_define ( "M4_MODE_NO_DO_STDINIT");
// mode switches for YY_DO_BEFORE_ACTION code generation
if (ctrl.yytext_is_array)
visible_define ( "M4_MODE_YYTEXT_IS_ARRAY");
else
visible_define ( "M4_MODE_NO_YYTEXT_IS_ARRAY");
if (yymore_used)
visible_define ( "M4_MODE_YYMORE_USED");
else
visible_define ( "M4_MODE_NO_YYMORE_USED");
if (ctrl.fullspd)
visible_define ( "M4_MODE_REAL_FULLSPD");
else
visible_define ( "M4_MODE_NO_REAL_FULLSPD");
if (ctrl.fulltbl)
visible_define ( "M4_MODE_REAL_FULLTBL");
else
visible_define ( "M4_MODE_NO_REAL_FULLTBL");
// niode switches for YYINPUT code generation
if (ctrl.use_read)
visible_define ( "M4_MODE_CPP_USE_READ");
else
visible_define ( "M4_MODE_NO_CPP_USE_READ");
// mode switches for next-action code
if (variable_trailing_context_rules) {
visible_define ( "M4_MODE_VARIABLE_TRAILING_CONTEXT_RULES");
} else {
visible_define ( "M4_MODE_NO_VARIABLE_TRAILING_CONTEXT_RULES");
}
if (real_reject)
visible_define ( "M4_MODE_REAL_REJECT");
if (ctrl.reject_really_used)
visible_define ( "M4_MODE_FIND_ACTION_REJECT_REALLY_USED");
if (reject)
visible_define ( "M4_MODE_USES_REJECT");
else
visible_define ( "M4_MODE_NO_USES_REJECT");
// mode switches for computing next compressed state
if (ctrl.usemecs)
visible_define ( "M4_MODE_USEMECS");
// mode switches for find-action code
if (ctrl.fullspd)
visible_define ( "M4_MODE_FULLSPD");
else if (ctrl.fulltbl)
visible_define ( "M4_MODE_FIND_ACTION_FULLTBL");
else if (reject)
visible_define ( "M4_MODE_FIND_ACTION_REJECT");
else
visible_define ( "M4_MODE_FIND_ACTION_COMPRESSED");
// mode switches for backup generation and gen_start_state
if (!ctrl.fullspd)
visible_define ( "M4_MODE_NO_FULLSPD");
if (bol_needed)
visible_define ( "M4_MODE_BOL_NEEDED");
else
visible_define ( "M4_MODE_NO_BOL_NEEDED");
// yylineno
if (ctrl.do_yylineno)
visible_define ( "M4_MODE_YYLINENO");
// Equivalence classes
if (ctrl.useecs)
visible_define ( "M4_MODE_USEECS");
else
visible_define ( "M4_MODE_NO_USEECS");
// mode switches for getting next action
if (gentables)
visible_define ( "M4_MODE_GENTABLES");
else
visible_define ( "M4_MODE_NO_GENTABLES");
if (ctrl.interactive == trit_true)
visible_define ( "M4_MODE_INTERACTIVE");
else
visible_define ( "M4_MODE_NO_INTERACTIVE");
if (!(ctrl.fullspd || ctrl.fulltbl))
visible_define ( "M4_MODE_NO_FULLSPD_OR_FULLTBL");
if (reject || ctrl.interactive == trit_true)
visible_define ( "M4_MODE_FIND_ACTION_REJECT_OR_INTERACTIVE");
if (ctrl.yyclass != NULL) {
visible_define ( "M4_MODE_YYCLASS");
out_m4_define("M4_YY_CLASS_NAME", ctrl.yyclass);
}
if (ctrl.ddebug)
visible_define ( "M4_MODE_DEBUG");
if (ctrl.lex_compat)
visible_define ( "M4_MODE_OPTIONS.LEX_COMPAT");
if (ctrl.do_yywrap)
visible_define ( "M4_MODE_YYWRAP");
else
visible_define ( "M4_MODE_NO_YYWRAP");
if (ctrl.interactive == trit_true)
visible_define ( "M4_MODE_INTERACTIVE");
if (ctrl.noyyread)
visible_define("M4_MODE_USER_YYREAD");
if (is_default_backend()) {
if (ctrl.C_plus_plus) {
visible_define ( "M4_MODE_CXX_ONLY");
} else {
visible_define ( "M4_MODE_C_ONLY");
}
}
if (tablesext)
visible_define ( "M4_MODE_TABLESEXT");
if (ctrl.prefix != NULL)
visible_define_str ( "M4_MODE_PREFIX", ctrl.prefix);
if (ctrl.no_yyinput)
visible_define("M4_MODE_NO_YYINPUT");
if (ctrl.bufsize != 0)
visible_define_int("M4_MODE_YY_BUFSIZE", ctrl.bufsize);
if (ctrl.yyterminate != NULL)
visible_define_str("M4_MODE_YYTERMINATE", ctrl.yyterminate);
if (ctrl.no_yypanic)
visible_define("M4_YY_NO_YYPANIC");
if (ctrl.no_yy_push_state)
visible_define("M4_YY_NO_PUSH_STATE");
if (ctrl.no_yy_pop_state)
visible_define("M4_YY_NO_POP_STATE");
if (ctrl.no_yy_top_state)
visible_define("M4_YY_NO_TOP_STATE");
if (ctrl.no_yyunput)
visible_define("M4_YY_NO_YYUNPUT");
if (ctrl.no_yy_scan_buffer)
visible_define("M4_YY_NO_SCAN_BUFFER");
if (ctrl.no_yy_scan_bytes)
visible_define("M4_YY_NO_SCAN_BYTES");
if (ctrl.no_yy_scan_string)
visible_define("M4_YY_NO_SCAN_STRING");
if (ctrl.no_yyget_extra)
visible_define("M4_YY_NO_GET_EXTRA");
if (ctrl.no_yyset_extra)
visible_define("M4_YY_NO_SET_EXTRA");
if (ctrl.no_yyget_leng)
visible_define("M4_YY_NO_GET_LENG");
if (ctrl.no_yyget_text)
visible_define("M4_YY_NO_GET_TEXT");
if (ctrl.no_yyget_lineno)
visible_define("M4_YY_NO_GET_LINENO");
if (ctrl.no_yyset_lineno)
visible_define("M4_YY_NO_SET_LINENO");
if (ctrl.no_yyget_column)
visible_define("M4_YY_NO_GET_COLUMN");
if (ctrl.no_yyset_column)
visible_define("M4_YY_NO_SET_COLUMN");
if (ctrl.no_yyget_in)
visible_define("M4_YY_NO_GET_IN");
if (ctrl.no_yyset_in)
visible_define("M4_YY_NO_SET_IN");
if (ctrl.no_yyget_out)
visible_define("M4_YY_NO_GET_OUT");
if (ctrl.no_yyset_out)
visible_define("M4_YY_NO_SET_OUT");
if (ctrl.no_yyget_lval)
visible_define("M4_YY_NO_GET_LVAL");
if (ctrl.no_yyset_lval)
visible_define("M4_YY_NO_SET_LVAL");
if (ctrl.no_yyget_lloc)
visible_define("M4_YY_NO_GET_LLOC");
if (ctrl.no_yyset_lloc)
visible_define("M4_YY_NO_SET_LLOC");
if (ctrl.no_flex_alloc)
visible_define("M4_YY_NO_FLEX_ALLOC");
if (ctrl.no_flex_realloc)
visible_define("M4_YY_NO_FLEX_REALLOC");
if (ctrl.no_flex_free)
visible_define("M4_YY_NO_FLEX_FREE");
if (ctrl.no_get_debug)
visible_define("M4_YY_NO_GET_DEBUG");
if (ctrl.no_set_debug)
visible_define("M4_YY_NO_SET_DEBUG");
if (ctrl.no_unistd)
visible_define("M4_YY_NO_UNISTD_H");
if (ctrl.always_interactive)
visible_define("M4_YY_ALWAYS_INTERACTIVE");
if (ctrl.never_interactive)
visible_define("M4_YY_NEVER_INTERACTIVE");
if (ctrl.stack_used)
visible_define("M4_YY_STACK_USED");
if (ctrl.rewrite)
visible_define ( "M4_MODE_REWRITE");
else
visible_define ( "M4_MODE_NO_REWRITE");
comment("END of m4 controls\n");
out ("\n");
}
/* set_up_initial_allocations - allocate memory for internal tables */
void set_up_initial_allocations (void)
{
maximum_mns = (ctrl.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_array(current_max_rules, sizeof(char));
rule_has_nl = allocate_array(current_max_rules, sizeof(char));
current_max_scs = INITIAL_MAX_SCS;
scset = allocate_integer_array (current_max_scs);
scbol = allocate_integer_array (current_max_scs);
scxclu = allocate_array(current_max_scs, sizeof(char));
sceof = allocate_array(current_max_scs, sizeof(char));
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_array(current_maxccls, sizeof(char));
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_array(current_max_dfas,
sizeof(union dfaacc_union));
nultrans = NULL;
}
void usage (void)
{
FILE *f = stdout;
if (!env.did_outfilename) {
snprintf (outfile_path, sizeof(outfile_path), outfile_template,
ctrl.prefix, suffix());
env.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, --env.trace %s should run in env.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"
" --backup-file=FILE write backing-up information 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"
" -e, --emit=LANG Specify target language\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 scanner\n"
" --bison-bridge scanner for Bison pure parser.\n"
" --bison-locations include yylloc support.\n"
" --stdinit initialize yyin/yyout to stdin/stdout\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, "flex", outfile_path, "flex");
}