--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xml/parse.sml	Sat Nov 05 15:05:13 2011 -0400
@@ -0,0 +1,77 @@
+(* Copyright (c) 2011, Adam Chlipala
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - The names of contributors may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+(* Building SML code from XML entity tables *)
+
+fun main () =
+    let
+        fun doFile fname =
+            let
+                val inf = TextIO.openIn fname
+
+                fun loop () =
+                    case TextIO.inputLine inf of
+                        NONE => TextIO.closeIn inf
+                      | SOME line =>
+                        if String.isPrefix "<!ENTITY " line then
+                            case String.tokens (fn ch => Char.isSpace ch orelse ch = #">") line of
+                                "<!ENTITY" :: ent :: exp :: _ =>
+                                let
+                                    val exp = if String.isPrefix "\"&#" exp andalso String.isSuffix ";\"" exp then
+                                                  let
+                                                      val middle = String.substring (exp, 3, size exp - 5)
+                                                  in
+                                                      if CharVector.all Char.isDigit middle then
+                                                          middle
+                                                      else if String.isPrefix "38;#" middle then
+                                                          String.extract (middle, 4, NONE)
+                                                      else
+                                                          raise Fail "Bad entity expression [1]"
+                                                  end
+                                              else
+                                                  raise Fail "Bad entity expansion [2]"
+                                in
+                                    print ("\t\t(\"" ^ ent ^ "\", " ^ exp ^ "),\n");
+                                    loop ()
+                                end
+                              | _ => raise Fail "Bad ENTITY line"
+                        else
+                            loop ()
+            in
+                loop ()
+            end
+    in
+        print "structure Entities = struct\n";
+        print "\tval all = [\n";
+        doFile "xml/xhtml-lat1.ent";
+        doFile "xml/xhtml-special.ent";
+        doFile "xml/xhtml-symbol.ent";
+        print "\t(\"\", 0)]\n";
+        print "end\n"
+    end
+
+val () = main ()