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//! Things that belong elsewhere but can't lie there for various silly reasons. 
//! 
//! E.g. one reason is to avoid circular references in the parser 
//! objects when the callbacks are defined in them. 
//! 
//! Created 2000-01-21 by Martin Stjernholm 
//! 
//! $Id: utils.pmod,v 1.2 2000/02/11 01:04:01 mast Exp $ 
 
 
array return_zero (mixed... ignored) {return 0;} 
array return_empty_array (mixed... ignored) {return ({});} 
 
int(1..1)|string|array unknown_tag_error (Parser.HTML p, string str) 
{ 
  RXML.rxml_fatal ("Unknown tag %O. Unknown tags are not " 
                   "allowed in this context.\n", p->tag_name()); 
  return ({}); 
} 
 
 
// PHtml callbacks. 
 
int(1..1)|string|array p_html_entity_cb (Parser.HTML p, string str) 
{ 
  string entity = p->tag_name(); 
  if (sizeof (entity)) { 
    if (entity[0] == '#') { 
      if (!p->type->free_text) return ({}); 
      string out; 
      if ((<"#x", "#X">)[entity[..1]]) { 
        if (sscanf (entity, "%*2s%x%*c", int c) == 2) out = (string) ({c}); 
      } 
      else 
        if (sscanf (entity, "%*c%d%*c", int c) == 2) out = (string) ({c}); 
      return out && ({out}); 
    } 
    return p->handle_var (entity); 
  } 
  return p->type->free_text ? 0 : ({}); 
} 
 
 
// PHtmlCompat callbacks. 
 
int(1..1)|string|array p_html_compat_tagmap_tag_cb ( 
  Parser.HTML p, string str, mixed... extra) 
{ 
  string name = p->flag_parse_html_compat ? lower_case (p->tag_name()) : p->tag_name(); 
  if (mixed tdef = p->tagmap_tags[name]) 
    if (stringp (tdef)) 
      return ({tdef}); 
    else if (arrayp (tdef)) 
      return tdef[0] (p, p->tag_args(), @tdef[1..], @extra); 
    else 
      return tdef (p, p->tag_args(), @extra); 
  else if (mixed cdef = p->tagmap_containers[name]) 
    // A container has been added. 
    p->_low_add_container (name, p_html_compat_tagmap_container_cb); 
  return 1; 
} 
 
int(1..1)|string|array p_html_compat_tagmap_container_cb ( 
  Parser.HTML p, mapping(string:string) args, string content, mixed... extra) 
{ 
  string name = p->flag_parse_html_compat ? lower_case (p->tag_name()) : p->tag_name(); 
  if (mixed cdef = p->tagmap_containers[name]) 
    if (stringp (cdef)) 
      return ({cdef}); 
    else if (arrayp (cdef)) 
      return cdef[0] (p, args, content, @cdef[1..], @extra); 
    else 
      return cdef (p, args, content, @extra); 
  else 
    // The container has disappeared from the mapping. 
    p->_low_add_container (name, 0); 
  return 1; 
} 
 
array p_html_compat_entity_cb (Parser.HTML p, string str) 
{ 
  string entity = p->tag_name(); 
  if (sizeof (entity) && entity[0] != '#') return p->handle_var (entity); 
  return p->type->free_text ? 0 : ({}); 
}