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#!/usr/bin/perl
print q(/* This is auto-generated from </usr/share/usb.ids>, don't modify! */
#define NULL 0
struct node {
int id;
const char *name;
int nb_subnodes;
struct node *subnodes;
};
);
my (@l, $sub, $subsub);
while (<>) {
chomp;
if (/^C\s+([\da-f]+)\s+(.*)/) { #- I want alphanumeric but I can't get this [:alnum:] to work :-(
push @l, [ $1, $2, $sub = [] ];
undef $subsub;
} elsif (/^\t([\da-f]+)\s+(.*)/ && defined $sub) {
my ($sub_id, $sub_descr) = ($1, $2);
$sub_id =~ /^[\da-f]{2}$/ or die "bad line $.: sub category number badly formatted ($_)\n";
push @$sub, [ $sub_id, $sub_descr, $subsub = [] ];
} elsif (/^\t\t([\da-f]+)\s+(.*)/ && defined $subsub) {
push @$subsub, [ $1, $2, [] ];
} elsif (/^\S/) {
undef $sub;
undef $subsub;
}
}
sub dump_it {
my ($l, $name, $prefix) = @_;
my @l = sort { $a->[0] cmp $b->[0] } @$l or return;
dump_it($_->[2], $name . '_' . $_->[0], "$prefix ") foreach @l;
print "${prefix}static struct node $name\[] = {\n";
foreach (@l) {
my $nb = @{$_->[2]};
my $sub = $nb ? $name . '_' . $_->[0] : 'NULL';
printf qq($prefix { 0x%x, "%s", $nb, $sub },\n), hex($_->[0]), $_->[1];
}
print "$prefix};\n";
}
dump_it(\@l, "classes", '');
print '
static int nb_classes = sizeof(classes) / sizeof(*classes);
static void lookup(const char **p, int *a_class, int kind, int nb_nodes, struct node *nodes) {
int i;
for (i = 0; i < nb_nodes; i++)
if (nodes[i].id == a_class[kind]) {
p[kind] = nodes[i].name;
return lookup(p, a_class, kind + 1, nodes[i].nb_subnodes, nodes[i].subnodes);
}
}
struct class_text {
const char *class_text;
const char *sub_text;
const char *prot_text;
};
extern struct class_text __attribute__ ((visibility("default"))) usb_class2text(unsigned long class_id) {
const char *p[3] = { NULL, NULL, NULL };
int a_class[3] = { (class_id >> 16) & 0xff, (class_id >> 8) & 0xff, class_id & 0xff };
if (a_class[0] != 0xff) lookup(p, a_class, 0, nb_classes, classes);
{
struct class_text r = { p[0], p[1], p[2] };
return r;
}
}
';
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