- speedup of IS_CHAR like macros, significant overall improvement

- More interfaces for new I/O functions: xmlNewIOInputStream,
  xmlParserInputBufferCreateIO, xmlCreateIOParserCtxt
- added I/O test to xmllint
Daniel

include/libxml/parser.h

@@ -428,6 +428,21 @@ int		 xmlParseChunk		(xmlParserCtxtPtr ctxt,
 					 int size,
 					 int terminate);
 
+/**
+ * Special I/O mode
+ */
+
+xmlParserCtxtPtr xmlCreateIOParserCtxt	(xmlSAXHandlerPtr sax,
+					 void *user_data,
+					 xmlInputReadCallback   ioread,
+					 xmlInputCloseCallback  ioclose,
+					 void *ioctx,
+					 xmlCharEncoding enc);
+
+xmlParserInputPtr xmlNewIOInputStream	(xmlParserCtxtPtr ctxt,
+					 xmlParserInputBufferPtr input,
+					 xmlCharEncoding enc);
+
 /**
  * Node infos
  */