Simplify XML parsing a bit.

	* xml-support.h (gdb_xml_parse_quick): Declare.
	* xml-support.c (gdb_xml_create_parser_and_cleanup_1): Renamed
	from gdb_xml_create_parser_and_cleanup, and added `old_chain'
	parameter.
	(gdb_xml_create_parser_and_cleanup): Reimplement on top of
	gdb_xml_create_parser_and_cleanup_1.
	(gdb_xml_parse_quick): New.
	* memory-map.c (parse_memory_map): Use gdb_xml_parse_quick.
	* osdata.c (osdata_parse): Ditto.
	* remote.c (remote_threads_info): Ditto.
	* solib-target.c (solib_target_parse_libraries): Ditto.
	* xml-syscall.c (syscall_parse_xml): Ditto.
	* xml-tdesc.c (tdesc_parse_xml): Ditto.

1 files changed, 10 insertions, 13 deletions

diff --git a/gdb/memory-map.c b/gdb/memory-map.c
index d10419c..77389eb 100644
--- a/gdb/memory-map.c
+++ b/gdb/memory-map.c
@@ -178,25 +178,22 @@ const struct gdb_xml_element memory_map_elements[] = {
 VEC(mem_region_s) *
 parse_memory_map (const char *memory_map)
 {
-  struct gdb_xml_parser *parser;
   VEC(mem_region_s) *result = NULL;
-  struct cleanup *before_deleting_result, *back_to;
+  struct cleanup *back_to;
   struct memory_map_parsing_data data = { NULL };
 
-  back_to = make_cleanup (null_cleanup, NULL);
-  parser = gdb_xml_create_parser_and_cleanup (_("target memory map"),
-					      memory_map_elements, &data);
-
-  /* Note: 'clear_result' will zero 'result'.  */
-  before_deleting_result = make_cleanup (clear_result, &result);
   data.memory_map = &result;
-
-  if (gdb_xml_parse (parser, memory_map) == 0)
-    /* Parsed successfully, don't need to delete the result.  */
-    discard_cleanups (before_deleting_result);
+  back_to = make_cleanup (clear_result, &result);
+  if (gdb_xml_parse_quick (_("target memory map"), NULL, memory_map_elements,
+			   memory_map, &data) == 0)
+    {
+      /* Parsed successfully, keep the result.  */
+      discard_cleanups (back_to);
+      return result;
+    }
 
   do_cleanups (back_to);
-  return result;
+  return NULL;
 }
 
 #endif /* HAVE_LIBEXPAT */