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#!/usr/bin/perl
#
# Regenerate (overwriting only if changed):
#
# regnodes.h
#
# from information stored in
#
# regcomp.sym
# regexp.h
#
# Accepts the standard regen_lib -q and -v args.
#
# This script is normally invoked from regen.pl.
BEGIN {
# Get function prototypes
require 'regen_lib.pl';
}
#use Fatal qw(open close rename chmod unlink);
use strict;
use warnings;
open DESC, 'regcomp.sym';
my $ind = 0;
my (@name,@rest,@type,@code,@args,@longj);
my ($desc,$lastregop);
while (<DESC>) {
s/#.*$//;
next if /^\s*$/;
s/\s*\z//;
if (/^-+\s*$/) {
$lastregop= $ind;
next;
}
unless ($lastregop) {
$ind++;
($name[$ind], $desc, $rest[$ind]) = split /\t+/, $_, 3;
($type[$ind], $code[$ind], $args[$ind], $longj[$ind])
= split /[,\s]\s*/, $desc, 4;
} else {
my ($type,@lists)=split /\s*\t+\s*/, $_;
die "No list? $type" if !@lists;
foreach my $list (@lists) {
my ($names,$special)=split /:/, $list , 2;
$special ||= "";
foreach my $name (split /,/,$names) {
my $real= $name eq 'resume'
? "resume_$type"
: "${type}_$name";
my @suffix;
if (!$special) {
@suffix=("");
} elsif ($special=~/\d/) {
@suffix=(1..$special);
} elsif ($special eq 'FAIL') {
@suffix=("","_fail");
} else {
die "unknown :type ':$special'";
}
foreach my $suffix (@suffix) {
$ind++;
$name[$ind]="$real$suffix";
$type[$ind]=$type;
$rest[$ind]="state for $type";
}
}
}
}
}
# use fixed width to keep the diffs between regcomp.pl recompiles
# as small as possible.
my ($width,$rwidth,$twidth)=(22,12,9);
$lastregop ||= $ind;
my $tot = $ind;
close DESC;
die "Too many regexp/state opcodes! Maximum is 256, but there are $lastregop in file!"
if $lastregop>256;
my $tmp_h = 'regnodes.h-new';
unlink $tmp_h if -f $tmp_h;
my $out = safer_open($tmp_h);
printf $out <<EOP,
/* -*- buffer-read-only: t -*-
!!!!!!! DO NOT EDIT THIS FILE !!!!!!!
This file is built by regcomp.pl from regcomp.sym.
Any changes made here will be lost!
*/
/* Regops and State definitions */
#define %*s\t%d
#define %*s\t%d
EOP
-$width, REGNODE_MAX => $lastregop - 1,
-$width, REGMATCH_STATE_MAX => $tot - 1
;
for ($ind=1; $ind <= $lastregop ; $ind++) {
my $oind = $ind - 1;
printf $out "#define\t%*s\t%d\t/* %#04x %s */\n",
-$width, $name[$ind], $ind-1, $ind-1, $rest[$ind];
}
print $out "\t/* ------------ States ------------- */\n";
for ( ; $ind <= $tot ; $ind++) {
printf $out "#define\t%*s\t(REGNODE_MAX + %d)\t/* %s */\n",
-$width, $name[$ind], $ind - $lastregop, $rest[$ind];
}
print $out <<EOP;
/* PL_regkind[] What type of regop or state is this. */
#ifndef DOINIT
EXTCONST U8 PL_regkind[];
#else
EXTCONST U8 PL_regkind[] = {
EOP
$ind = 0;
while (++$ind <= $tot) {
printf $out "\t%*s\t/* %*s */\n",
-1-$twidth, "$type[$ind],", -$width, $name[$ind];
print $out "\t/* ------------ States ------------- */\n"
if $ind == $lastregop and $lastregop != $tot;
}
print $out <<EOP;
};
#endif
/* regarglen[] - How large is the argument part of the node (in regnodes) */
#ifdef REG_COMP_C
static const U8 regarglen[] = {
EOP
$ind = 0;
while (++$ind <= $lastregop) {
my $size = 0;
$size = "EXTRA_SIZE(struct regnode_$args[$ind])" if $args[$ind];
printf $out "\t%*s\t/* %*s */\n",
-37, "$size,",-$rwidth,$name[$ind];
}
print $out <<EOP;
};
/* reg_off_by_arg[] - Which argument holds the offset to the next node */
static const char reg_off_by_arg[] = {
EOP
$ind = 0;
while (++$ind <= $lastregop) {
my $size = $longj[$ind] || 0;
printf $out "\t%d,\t/* %*s */\n",
$size, -$rwidth, $name[$ind]
}
print $out <<EOP;
};
#endif /* REG_COMP_C */
/* reg_name[] - Opcode/state names in string form, for debugging */
#ifndef DOINIT
EXTCONST char * PL_reg_name[];
#else
EXTCONST char * const PL_reg_name[] = {
EOP
$ind = 0;
my $ofs = 1;
my $sym = "";
while (++$ind <= $tot) {
my $size = $longj[$ind] || 0;
printf $out "\t%*s\t/* $sym%#04x */\n",
-3-$width,qq("$name[$ind]",), $ind - $ofs;
if ($ind == $lastregop and $lastregop != $tot) {
print $out "\t/* ------------ States ------------- */\n";
$ofs = $lastregop;
$sym = 'REGNODE_MAX +';
}
}
print $out <<EOP;
};
#endif /* DOINIT */
/* PL_reg_extflags_name[] - Opcode/state names in string form, for debugging */
#ifndef DOINIT
EXTCONST char * PL_reg_extflags_name[];
#else
EXTCONST char * const PL_reg_extflags_name[] = {
EOP
open my $fh,"<","regexp.h" or die "Can't read regexp.h: $!";
my %rxfv;
my $val = 0;
my %reverse;
while (<$fh>) {
if (/#define\s+(RXf_\w+)\s+(0x[A-F\d]+)/i) {
my $newval = eval $2;
if($val & $newval) {
die sprintf "Both $1 and $reverse{$newval} use %08X", $newval;
}
$val|=$newval;
$rxfv{$1}= $newval;
$reverse{$newval} = $1;
}
}
my %vrxf=reverse %rxfv;
printf $out "\t/* Bits in extflags defined: %032b */\n",$val;
for (0..31) {
my $n=$vrxf{2**$_}||"UNUSED_BIT_$_";
$n=~s/^RXf_(PMf_)?//;
printf $out qq(\t%-20s/* 0x%08x */\n),
qq("$n",),2**$_;
}
print $out <<EOP;
};
#endif /* DOINIT */
/* ex: set ro: */
EOP
safer_close($out);
rename_if_different $tmp_h, 'regnodes.h';
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