summaryrefslogtreecommitdiff
path: root/regcomp.pl
blob: 38c346cc0c1dc6d647c3e6a57beee2760873652d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
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 = 'tmp_reg.h';

unlink $tmp_h if -f $tmp_h;

open OUT, ">$tmp_h";
#*OUT=\*STDOUT;
binmode OUT;

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 * 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 */

/* ex: set ro: */
EOP

close OUT or die "close $tmp_h: $!";

safer_rename $tmp_h, 'regnodes.h';