* ext/iconv/iconv.c: iconvctl() support. [EXPERIMENTAL]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 53 insertions, 0 deletions

diff --git a/ext/iconv/mkwrapper.rb b/ext/iconv/mkwrapper.rb
new file mode 100644
index 0000000000..34718507d6
--- /dev/null
+++ b/ext/iconv/mkwrapper.rb
@@ -0,0 +1,53 @@
+#! /usr/bin/ruby
+require 'rbconfig'
+require 'optparse'
+
+# http://www.ctan.org/tex-archive/macros/texinfo/texinfo/intl/config.charset
+# Fri, 30 May 2003 00:09:00 GMT'
+
+HEADER = <<SRC
+require 'iconv.so'
+
+class Iconv
+  case RUBY_PLATFORM
+SRC
+
+def charset_alias(config_charset, mapfile = nil)
+  found = nil
+  src = [HEADER]
+  open(config_charset) do |input|
+    input.find {|line| /^case "\$os" in/ =~ line} or return
+    input.each do |line|
+      case line
+      when /^\s*([-\w\*]+(?:\s*\|\s*[-\w\*]+)*)(?=\))/
+        (s = "  when ") << $&.split('|').collect {|targ|
+          targ.strip!
+          tail = targ.chomp!("*") ? '' : '\z'
+          head = targ.slice!(/\A\*/) ? '' : '\A'
+          targ.gsub!(/\*/, '.*')
+          "/#{head}#{targ}#{tail}/"
+        }.join(", ")
+        src << s
+        found = {}
+      when /^\s*echo "(?:\$\w+\.)?([-\w*]+)\s+([-\w]+)"/
+        sys, can = $1, $2
+        can.downcase!
+        unless found[can] or (/\Aen_(?!US\z)/ =~ sys && /\ACP437\z/i =~ can)
+          found[can] = true
+          src << "    charset_map['#{can}'] = '#{sys}'.freeze"
+        end
+      when /^\s*;;/
+        found = nil
+      end
+    end
+  end
+  src << "  end" << "end"
+  if mapfile
+    open(mapfile, "wb") {|f| f.puts *src}
+  else
+    puts *src
+  end
+end
+
+(1..2) === ARGV.size or abort "usage: #{$0} config_charset [mapfile]"
+charset_alias(*ARGV)