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#!/usr/bin/env perl
######
# runtime.pl
# Tom Prince 2004/4/15
#
# Generate the runtime functions used by the vm::stack machine.
#
#####
$stack = "Stack";
sub clean_type {
for (@_) {
s/\s//g;
}
}
sub clean_params {
for (@_) {
s/\n//g;
}
}
my %type_map;
sub read_types {
my @types = split /\n/, shift;
for (@types) {
my ($type,$code) =
m|(\w*(?:\s*\*)?)
\s*=>\s*
(.*)
|x;
clean_type($type);
$type_map{$type} = $code;
}
}
sub asy_params {
my @params = @_;
for (@params) {
my ($explicit, $type, $name, $default) =
m|^\s*
(explicit)*\s*(\w*(?:\s*\*)?)
\s*
(\w*)(=*)|xs;
clean_type($type);
$_ = "formal(" . $type_map{$type} . ", \"" . lc($name) . "\"" . ", " .
($default ? "true" : "false") . ", " .
($explicit ? "true" : "false") . ")";
}
return @params;
}
sub c_params {
my @params = @_;
for (@params) {
my ($explicit, $type, $name, $default, $value) =
m|^\s*
(explicit)*\s*(\w*(?:\s*\*)?)
\s*
(\w*)(=*)([\w.+\-]*)|xs;
$_ = " $type $name=vm::pop" . ($type =~ /^item$/ ? "" : "<$type>") .
"($stack" . ($default ? "," . $value : "") . ");\n";
}
reverse @params;
}
$/ = "\f\n";
open STDIN, "<runtime.in";
open STDOUT, ">runtime.cc";
my $autogenerated=
"/***** Autogenerated from runtime.in; changes will be overwritten *****/\n\n";
my $source_line = 1;
print $autogenerated;
print "#line $source_line \"runtime.in\"\n";
$header = <>;
print $header;
$source_line += ($header =~ tr/\n//);;
$types = <>;
$source_line += ($types =~ tr/\n//);;
print "#line $source_line \"runtime.in\"\n";
$header = <>;
print $header;
$source_line += ($header =~ tr/\n//);;
print "\nnamespace run {\n";
read_types($types);
### Begining of `runtime.h'
push @header, $autogenerated;
push @header, "#ifndef RUNTIME_H\n";
push @header, "#define RUNTIME_H\n\n";
push @header, "namespace run {\n";
my $count = 0;
while (<>) {
my ($comments,$type,$name,$cname,$params,$code) =
m|^((?:\s*//[^\n]*\n)*) # comment lines
\s*
(\w*(?:\s*\*)?) # return type
\s*
([^(:]*)\:*([^(]*) # function name
\s*
\(([\w\s*,=.+\-]*)\) # parameters
\s*
\{(.*)} # body
|xs;
if($cname) {push @header, "void $cname(vm::stack *);\n";}
else {$cname="gen${count}";} # Unique C++ function name
clean_type($type);
my @params = split m/,\s*/, $params;
# Build addFunc call for asymptote
if($name) {
$name =~ s/Operator\s*//;
push @builtin, "#line $source_line \"runtime.in\"\n"
. " addFunc(ve, run::" . $cname
. ", " . $type_map{$type}
. ", " . '"' . $name . '"'
. ( @params ? ", " . join(", ",asy_params(@params))
: "" )
. ");\n";
}
# Handle marshalling of values to/from stack
$qualifier = ($type eq "item" ? "" : "<$type>");
$code =~ s/\breturn ([^;]*);/{$stack->push$qualifier($1); return;}/g;
$args = join("",c_params(@params));
print $comments;
$ncomments = ($comments =~ tr/\n//);
$source_line += $ncomments;
print "#line $source_line \"runtime.in\"\n";
my $prototype=$type . " " . $name . "(" . $params . ");";
$nprototype = ($prototype =~ tr/\n//)+1;
$source_line += $nprototype;
if($name) {
clean_params($prototype);
print "// $prototype\n";
}
print "void $cname(stack *";
if($type ne "void" or $params ne "") {print $stack;}
print ")\n{\n$args";
print "#line $source_line \"runtime.in\"";
print "$code}\n\n";
$source_line -= $ncomments+$nprototype;
$source_line += ($_ =~ tr/\n//);
++$count;
}
print "} // namespace run\n";
print "\nnamespace trans {\n\n";
print "void gen_base_venv(venv &ve)\n{\n";
print @builtin;
print "}\n\n";
print "} // namespace trans\n";
### End of `header.h'
push @header, "}\n\n";
push @header, "#endif // RUNTIME_H\n";
undef $/;
open HEADER, "<", "runtime.h";
$orig_header = <HEADER>;
$new_header = join "", @header;
if ($new_header ne $orig_header) {
open HEADER, ">", "runtime.h";
print HEADER $new_header;
}
|
