? registerErrorHandler.patch
Index: ruby_xml_parser.c
===================================================================
RCS file: /var/cvs/xml-tools/libxml-ruby/ruby_xml_parser.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 ruby_xml_parser.c
--- ruby_xml_parser.c	22 Mar 2005 19:25:34 -0000	1.1.1.1
+++ ruby_xml_parser.c	5 Nov 2005 12:17:56 -0000
@@ -4,6 +4,9 @@
 
 #include "libxml.h"
 
+static VALUE libxml_xmlRubyErrorProc = Qnil;
+static int id_call;
+
 int ruby_xml_parser_count = 0;
 VALUE cXMLParser;
 VALUE eXMLParserParseError;
@@ -848,6 +851,35 @@
 }
 
 
+VALUE
+ruby_xml_parser_registerErrorHandler(int argc, VALUE* argv, VALUE self) {
+  VALUE old_block = libxml_xmlRubyErrorProc;
+  rb_scan_args(argc, argv, "0&", &libxml_xmlRubyErrorProc);
+  return(old_block);
+}
+
+static void
+libxml_xmlErrorFuncHandler(ATTRIBUTE_UNUSED void *ctx, const char *msg,
+                           ...)
+{
+  va_list ap;
+  char str[1000];
+  VALUE rstr;
+
+  if (libxml_xmlRubyErrorProc == Qnil) {
+    va_start(ap, msg);
+    vfprintf(stderr, msg, ap);
+    va_end(ap);
+  } else {
+    va_start(ap, msg);
+    if (vsnprintf(str, 999, msg, ap) >= 998) str[999] = 0;
+    va_end(ap);
+
+    rstr = rb_str_new2(str);
+    rb_funcall2(libxml_xmlRubyErrorProc, id_call, 1, &rstr);
+  }
+}
+
 #define RUBY_XML_PARSER_ENABLED_INIT(func, method) \
 rb_define_singleton_method(cXMLParser, method, \
 			   ruby_xml_parser_enabled_##func##_q, 0);
@@ -951,6 +983,7 @@
 			     ruby_xml_parser_memory_used, 0);
   rb_define_singleton_method(cXMLParser, "new", ruby_xml_parser_new, 0);
   rb_define_singleton_method(cXMLParser, "string", ruby_xml_parser_new_string, 1);
+  rb_define_singleton_method(cXMLParser, "registerErrorHandler", ruby_xml_parser_registerErrorHandler, -1);
 
   rb_define_method(cXMLParser, "filename", ruby_xml_parser_filename_get, 0);
   rb_define_method(cXMLParser, "filename=", ruby_xml_parser_filename_set, 1);
@@ -960,4 +993,9 @@
   rb_define_method(cXMLParser, "parser_context", ruby_xml_parser_parser_context_get, 0);
   rb_define_method(cXMLParser, "string", ruby_xml_parser_str_get, 0);
   rb_define_method(cXMLParser, "string=", ruby_xml_parser_str_set, 1);
+
+  // set up error handling
+  xmlSetGenericErrorFunc(NULL, libxml_xmlErrorFuncHandler);
+  xmlThrDefSetGenericErrorFunc(NULL, libxml_xmlErrorFuncHandler);
+  id_call = rb_intern("call");
 }