2002-11-22 David Carlton <carlton@math.stanford.edu>

	* symtab.h: Add opaque declarations for struct namespace_info and
	struct obstack.
	(struct block): The language_specific stuff is now a struct
	namespace_info rather than a struct using_direct_node.
	(BLOCK_NAMESPACE): New macro.
	Delete macro BLOCK_USING.
	Add declarations for block_using, block_all_usings,
	block_set_using, block_scope, block_set_scope.
	* symtab.c: #include "gdb_assert.h"
	(lookup_symbol_aux): Move minsym stuff inside
	lookup_symbol_aux_nonlocal, and always do global search via
	lookup_symbol_aux_using.
	(lookup_symbol_aux_nonlocal): Do minsym search.
	(lookup_symbol_aux_using): Calculate usings via block_all_usings;
	handle namespace scope.
	(lookup_symbol_aux_using_loop): New function, not to be confused
	with the previous function of the same name.  (Sorry about that.)
	(lookup_symbol_namespace): Renamed from
	lookup_symbol_aux_using_loop.
	(lookup_symbol_aux_minsyms): Add block_index argument, delete
	is_a_field_of_this argument, and only check either global or
	static symbols rather than both of them.
	(block_using): New function.
	(block_all_usings): New function.
	(block_set_using): New function.
	(block_scope): New function.
	(block_set_scope): New function.
	(block_initialize_namespace): New function.
	* jv-lang.c (get_java_class_symtab): BLOCK_NAMESPACE instead of
	BLOCK_USING.
	* dwarf2read.c: Delete variable current_namespace, and replace its
	uses by processing_current_namespace (from buildsym.h).
	(scan_partial_symbols): Allow empty pdi.name if we're
	reading a namespace.
	* cp-support.h (struct namespace_info): New struct.
	* cp-support.c: Add comment.
	* buildsym.h: New variable processing_current_namespace.
	* buildsym.c (add_symbol_to_list): Do fast search for
	"(anonymous namespace)".
	(scan_for_anonymous_namespaces): Delete FIXME.  Convert for loop
	into a clearer while loop.
	(finish_block): Replace BLOCK_USING by BLOCK_NAMESPACE.
	(finish_block): Set block_scope of function blocks rather than
	generating using directives that would have a similar effect.
	(end_symtab): Set using via block_set_using rather than
	BLOCK_USING.
	* Makefile.in (symtab.o): Depend on gdb_assert_h.

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