From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/sample/exyacc.rb | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 jni/ruby/sample/exyacc.rb

(limited to 'jni/ruby/sample/exyacc.rb')

diff --git a/jni/ruby/sample/exyacc.rb b/jni/ruby/sample/exyacc.rb
new file mode 100644
index 0000000..7b37a8b
--- /dev/null
+++ b/jni/ruby/sample/exyacc.rb
@@ -0,0 +1,20 @@
+#! /usr/local/bin/ruby -Kn
+# usage: exyacc.rb [yaccfiles]
+# this is coverted from exyacc.pl in the camel book
+
+ARGF.each(nil) do |source|
+  sbeg = source.index("\n%%") + 1
+  send = source.rindex("\n%%") + 1
+  grammar = source[sbeg, send-sbeg]
+  grammar.sub!(/.*\n/, "")
+  grammar.gsub!(/'\{'/, "'\001'")
+  grammar.gsub!(/'\}'/, "'\002'")
+  grammar.gsub!(%r{\*/}, "\003\003")
+  grammar.gsub!(%r{/\*[^\003]*\003\003}, '')
+  while grammar.gsub!(/\{[^{}]*\}/, ''); end
+  grammar.gsub!(/'\001'/, "'{'")
+  grammar.gsub!(/'\002'/, "'}'")
+  while grammar.gsub!(/^[ \t]*\n(\s)/, '\1'); end
+  grammar.gsub!(/([:|])[ \t\n]+(\w)/, '\1 \2')
+  print grammar
+end
-- 
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