1 files changed, 59 insertions, 0 deletions
diff --git a/template/transdb.h.tmpl b/template/transdb.h.tmpl
new file mode 100644
index 0000000000..d0cf101344
--- /dev/null
+++ b/template/transdb.h.tmpl
@@ -0,0 +1,59 @@
+<%
+#
+# static const rb_transcoder
+# rb_from_US_ASCII = {
+#     "US-ASCII", "UTF-8", &from_US_ASCII, 1, 0,
+#     NULL, NULL,
+# };
+#
+
+count = 0
+converters = {}
+transdirs = ARGV.dup
+transdirs << 'enc/trans' if transdirs.empty?
+
+transdirs = transdirs.sort_by {|td|
+  -td.length
+}.inject([]) {|tds, td|
+  next tds unless File.directory?(td)
+  tds << td if tds.all? {|td2| !File.identical?(td2, td) }
+  tds
+}
+
+files = {}
+names_t = []
+converter_list = []
+transdirs.each do |transdir|
+  names = Dir.entries(transdir)
+  names_t += names.map {|n| /(?!\A)\.trans\z/ =~ n ? $` : nil }.compact
+  names_c = names.map {|n| /(?!\A)\.c\z/ =~ n ? $` : nil }.compact
+  (names_t & names_c).map {|n|
+    "#{n}.c"
+  }.sort_by {|e|
+    e.scan(/(\d+)|(\D+)/).map {|n,a| a||[n.size,n.to_i]}.flatten
+  }.each do |fn|
+    next if files[fn]
+    files[fn] = true
+    path = File.join(transdir,fn)
+    open(path) do |f|
+      f.each_line do |line|
+        if (/^static const rb_transcoder/ =~ line)..(/"(.*?)"\s*,\s*"(.*?)"/ =~ line)
+          if $1 && $2
+            from_to = "%s to %s" % [$1, $2]
+            if converters[from_to]
+              raise ArgumentError, '%s:%d: transcode "%s" is already registered at %s:%d' %
+              [path, $., from_to, *converters[from_to].values_at(3, 4)]
+            else
+              converters[from_to] = [$1, $2, fn[0..-3], path, $.]
+              converter_list << from_to
+            end
+          end
+        end
+      end
+    end
+  end
+end
+converter_list.each do |from_to|
+  from, to, fn = *converters[from_to]
+%>rb_declare_transcoder("<%=from%>", "<%=to%>", "<%=fn%>");
+% end