aboutsummaryrefslogtreecommitdiffstats
path: root/asm/warnings.pl
blob: 384c18dae35e3be048d4c305f26fea0db1f5f138 (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
#!/usr/bin/perl

use strict;
use File::Find;
use File::Basename;

my @warnings = ();
my $err = 0;
my $nwarn = 0;

sub quote_for_c($) {
    my $s = join('', @_);

    $s =~ s/([\"\'\\])/\\\1/g;
    return $s;
}

sub find_warnings {
    my $infile = $_;

    return unless ($infile =~ /\.[ch]$/i);
    open(my $in, '<', $infile)
	or die "$0: cannot open input file $infile: $!\n";

    my $in_comment = 0;
    my $nline = 0;
    my $this;
    my @doc;

    while (defined(my $l = <$in>)) {
	$nline++;
	chomp $l;

	if (!$in_comment) {
	    $l =~ s/^.*?\/\*.*?\*\///g; # Remove single-line comments

	    if ($l =~ /^.*?(\/\*.*)$/) {
		# Begin block comment
		$l = $1;
		$in_comment = 1;
	    }
	}

	if ($in_comment) {
	    if ($l =~ /\*\//) {
		# End block comment
		$in_comment = 0;
		undef $this;
	    } elsif ($l =~ /^\s*\/?\*\!(\s*)(.*?)\s*$/) {
		my $ws = $1;
		my $str = $2;

		if (!defined($this) || ($ws eq '' && $str ne '')) {
		    if ($str =~ /^(\w+)\s+(\w+)\s(.+)$/) {
			my $name = $1;
			my $def = $2;
			my $help = $3;

			my $cname = uc($name);
			$cname =~ s/[^A-Z0-9_]+/_/g;

			$this = {name => $name, cname => $cname,
				 def => $def, help => $help, doc => [],
				 file => $infile, line => $nline};
			push(@warnings, $this);
			$nwarn++;
		    } else {
			print STDERR "$infile:$nline: malformed warning definition\n";
			print STDERR "    $l\n";
			$err++;
		    }
		} else {
		    push(@{$this->{doc}}, "$str\n");
		}
	    } else {
		undef $this;
	    }
	}
    }
    close($in);
}

my($what, $outfile, @indirs) = @ARGV;

if (!defined($outfile)) {
    die "$0: usage: [c|h|doc] outfile indir...\n";
}

find({ wanted => \&find_warnings, no_chdir => 1, follow => 1 }, @indirs);

exit(1) if ($err);

my %sort_special = ( 'other' => 1, 'all' => 2 );
sub sort_warnings {
    my $an = $a->{name};
    my $bn = $b->{name};
    return ($sort_special{$an} <=> $sort_special{$bn}) || ($an cmp $bn);
}

@warnings = sort sort_warnings @warnings;
my @warn_noall = @warnings;
pop @warn_noall if ($warn_noall[$#warn_noall]->{name} eq 'all');

open(my $out, '>', $outfile)
    or die "$0: cannot open output file $outfile: $!\n";

if ($what eq 'c') {
    print $out "#include \"error.h\"\n\n";
    printf $out "const char * const warning_names[%d] = {\n",
	$#warnings + 2;
    print $out "\tNULL";
    foreach my $warn (@warnings) {
	print $out ",\n\t\"", $warn->{name}, "\"";
    }
    print $out "\n};\n\n";
    printf $out "const char * const warning_help[%d] = {\n",
	$#warnings + 2;
    print $out "\tNULL";
    foreach my $warn (@warnings) {
	my $help = quote_for_c($warn->{help});
	print $out ",\n\t\"", $help, "\"";
    }
    print $out "\n};\n\n";
    printf $out "const uint8_t warning_defaults[%d] = {\n",
	$#warn_noall + 2;
    print $out "\tWARN_INIT_ON"; # for entry 0
    foreach my $warn (@warn_noall) {
	print $out ",\n\tWARN_INIT_", uc($warn->{def});
    }
    print $out "\n};\n";
} elsif ($what eq 'h') {
    my $guard = basename($outfile);
    $guard =~ s/[^A-Za-z0-9_]+/_/g;
    $guard = "NASM_\U$guard";

    print $out "#ifndef $guard\n";
    print $out "#define $guard\n";
    print $out "\n";
    print $out "#include \"compiler.h\"\n\n";
    print $out "enum warn_index {\n";
    printf $out "\tWARN_IDX_%-15s = %2d", 'NONE', 0;
    my $n = 1;
    foreach my $warn (@warnings) {
	printf $out ",\n\tWARN_IDX_%-15s = %2d%s    /* %s */",
	    $warn->{cname}, $n++, $warn->{help};
    }
    print $out "\n};\n\n";

    print $out "enum warn_const {\n";
    printf $out "\tWARN_%-19s = %2d << WARN_SHR", 'NONE', 0;
    my $n = 1;
    foreach my $warn (@warn_noall) {
	printf $out ",\n\tWARN_%-19s = %2d << WARN_SHR", $warn->{cname}, $n++;
    }
    print $out "\n};\n\n";

    printf $out "extern const char * const warning_names[%d];\n",
	$#warnings + 2;
    printf $out "extern const char * const warning_help[%d];\n",
	$#warnings + 2;
    printf $out "extern const uint8_t warning_defaults[%d];\n",
	$#warn_noall + 2;
    print $out "\n#endif /* $guard */\n";
} elsif ($what eq 'doc') {
    my %whatdef = ( 'on' => 'Enabled',
		    'off' => 'Disabled',
		    'err' => 'Enabled and promoted to error' );
    foreach my $warn (@warnings) {

	my @doc = @{$warn->{doc}};
	shift @doc while ($doc[0] =~ /^\s*$/);
	pop @doc while ($doc[$#doc] =~ /^\s*$/);

	print $out "\\b \\i\\c{", $warn->{name}, "} ", @doc;

	my $docdef = $whatdef{$warn->{def}};
	if (defined($docdef)) {
	    print $out $docdef, " by default.\n";
	}

	print $out "\n";
    }
}
close($out);