new insns.def format

- Gave up @j comments
- Room for sp_inc to be a proper grammer element

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61729 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 29 insertions, 0 deletions

diff --git a/tool/ruby_vm/scripts/converter.rb b/tool/ruby_vm/scripts/converter.rb
new file mode 100644
index 0000000000..4e7c28d67b
--- /dev/null
+++ b/tool/ruby_vm/scripts/converter.rb
@@ -0,0 +1,29 @@
+# This script was needed only once when I converted the old insns.def.
+# Consider historical.
+#
+# ruby converter.rb insns.def | sponge insns.def
+
+BEGIN { $str = ARGF.read }
+END   { puts $str }
+
+# deal with spaces
+$str.gsub! %r/\r\n|\r|\n|\z/, "\n"
+$str.gsub! %r/([^\t\n]*)\t/ do
+  x = $1
+  y = 8 - x.length % 8
+  next x + ' ' * y
+end
+$str.gsub! %r/\s+$/, "\n"
+
+# deal with comments
+$str.gsub! %r/@c.*?@e/m, ''
+$str.gsub! %r/@j.*?\*\//m, '*/'
+$str.gsub! %r/\n(\s*\n)+/, "\n\n"
+$str.gsub! %r/\/\*\*?\s*\n\s*/, "/* "
+$str.gsub! %r/\n\s+\*\//, " */"
+$str.gsub! %r/^(?!.*\/\*.+\*\/$)(.+?)\s*\*\//, "\\1\n */"
+
+# deal with sp_inc
+$str.gsub! %r/ \/\/ inc -= (.*)/, ' // inc += -\\1'
+$str.gsub! %r/\s+\/\/ inc \+= (.*)/, "\n// attr rb_snum_t sp_inc = \\1;"
+$str.gsub! %r/;;$/, ";"