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-rw-r--r--tool/ruby_vm/loaders/vm_opts_h.rb37
1 files changed, 37 insertions, 0 deletions
diff --git a/tool/ruby_vm/loaders/vm_opts_h.rb b/tool/ruby_vm/loaders/vm_opts_h.rb
new file mode 100644
index 0000000..f898fb3
--- /dev/null
+++ b/tool/ruby_vm/loaders/vm_opts_h.rb
@@ -0,0 +1,37 @@
+#! /your/favourite/path/to/ruby
+# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- frozen_string_literal: true; -*-
+# -*- warn_indent: true; -*-
+#
+# Copyright (c) 2017 Urabe, Shyouhei. All rights reserved.
+#
+# This file is a part of the programming language Ruby. Permission is hereby
+# granted, to either redistribute and/or modify this file, provided that the
+# conditions mentioned in the file COPYING are met. Consult the file for
+# details.
+
+require_relative '../helpers/scanner'
+
+json = {}
+scanner = RubyVM::Scanner.new '../../../vm_opts.h'
+grammar = %r/
+ (?<ws> \u0020 ){0}
+ (?<key> \w+ ){0}
+ (?<value> 0|1 ){0}
+ (?<define> \#define \g<ws>+ OPT_\g<key> \g<ws>+ \g<value> \g<ws>*\n )
+/mx
+
+until scanner.eos? do
+ if scanner.scan grammar then
+ json[scanner['key']] = ! scanner['value'].to_i.zero? # not nonzero?
+ else
+ scanner.scan(/.*\n/)
+ end
+end
+
+RubyVM::VmOptsH = json
+
+if __FILE__ == $0 then
+ require 'json'
+ JSON.dump RubyVM::VmOptsH, STDOUT
+end