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|
#!/usr/bin/perl -w
use strict;
# declarations
my $address_family = "";
my %methods = ();
my $line = "";
my $match = "";
# subroutines
sub nextline {
$line = <>;
while($line and ($line =~ /^#/ or $line =~ /^\s*$/)) {
$line = <>;
}
if (!$line) { return 0; }
chomp $line;
while ($line =~ m/^(.*)\\$/) {
my $addon = <>;
chomp $addon;
$line = $1 . $addon;
}
return 1;
}
sub match {
my $line = $_[0];
my $cmd = "$_[1]" ? "$_[1]\\b\\s*" : "";;
my $indentexp = (@_ == 3) ? "$_[2]\\s+" : "";
if ($line =~ /^${indentexp}${cmd}(([^\s](.*[^\s])?)?)\s*$/) {
$match = $1;
return 1;
} else {
return 0;
}
}
sub get_address_family {
$address_family = $_[0] if ($address_family eq "");
nextline;
}
sub get_architecture {
my $arch = $_[0];
die("architecture declaration appears too late") if (keys %methods);
print "#include \"arch${arch}.h\"\n\n\n";
nextline;
}
sub get_method {
my $method = $_[0];
my $indent = ($line =~ /(\s*)[^\s]/) ? $1 : "";
die "Duplicate method $method\n" if ($methods{$method}++);
nextline;
if (match($line, "description", $indent)) {
skip_section();
}
if (match($line, "options", $indent)) {
skip_section();
}
if (match($line, "up", $indent)) {
get_commands(${method}, "up");
} else {
print "static int ${method}_up(interface_defn ifd) { return 0; }\n"
}
if (match($line, "down", $indent)) {
get_commands(${method}, "down");
} else {
print "static int ${method}_down(interface_defn ifd) { return 0; }\n"
}
}
sub skip_section {
my $struct = $_[0];
my $indent = ($line =~ /(\s*)[^\s]/) ? $1 : "";
1 while (nextline && match($line, "", $indent));
}
sub get_commands {
my $method = $_[0];
my $mode = $_[1];
my $function = "${method}_${mode}";
my $indent = ($line =~ /(\s*)[^\s]/) ? $1 : "";
print "static int ${function}(interface_defn *ifd, execfn *exec) {\n";
while (nextline && match($line, "", $indent)) {
if ( $match =~ /^(.*[^\s])\s+if\s*\((.*)\)\s*$/ ) {
print "if ( $2 ) {\n";
print " if (!execute(\"$1\", ifd, exec)) return 0;\n";
print "}\n";
} elsif ( $match =~ /^(.*[^\s])\s+elsif\s*\((.*)\)\s*$/ ) {
print "else if ( $2 ) {\n";
print " if (!execute(\"$1\", ifd, exec)) return 0;\n";
print "}\n";
} elsif ( $match =~ /^(.*[^\s])\s*$/ ) {
print "{\n";
print " if (!execute(\"$1\", ifd, exec)) return 0;\n";
print "}\n";
}
}
print "return 1;\n";
print "}\n";
}
# main code
print "#include \"header.h\"\n\n\n";
nextline;
while($line) {
if (match($line, "address_family")) {
get_address_family $match;
next;
}
if (match($line, "architecture")) {
get_architecture $match;
next;
}
if (match($line, "method")) {
get_method $match;
next;
}
# ...otherwise
die("Unknown command \"$line\"");
}
print "static method methods[] = {\n";
my $method;
foreach $method (keys %methods) {
print <<EOF;
{
"$method",
${method}_up, ${method}_down,
},
EOF
}
print "};\n\n";
print <<EOF;
address_family addr_${address_family} = {
"$address_family",
sizeof(methods)/sizeof(struct method),
methods
};
EOF
|
