* cpplib.h (parse_underflow_t, CPP_NULL_BUFFER): Delete.

	(struct cpp_buffer): Remove fname and underflow fields.
	(struct cpp_reader): Remove get_token field.
	(struct include_hash): Rename to struct ihash.  Add typedef to
	IHASH.
	(struct if_stack): Remove fname field.
	(IF_STACK_FRAME): Rename to IF_STACK.

	* cpperror.c (print_containing_files): Trust that there are no
	macro buffers below the top file buffer.
	* cppfiles.c: Replace all references to 'struct include_hash'
	with 'IHASH'.  Rename initialize_input_buffer to
	init_input_buffer.  Don't set or reference cpp_buffer->fname,
	use buffer->ihash->name instead.
	* cpphash.c (special_symbol): Use cpp_file_buffer.  Use NULL
	not CPP_NULL_BUFFER.
	* cppinit.c: Use NULL not CPP_NULL_BUFFER, IF_STACK not
	IF_STACK_FRAME, IHASH not struct include_hash.
	* cpplib.c: Rename eval_if_expression to eval_if_expr.  Remove
	null_underflow.  Use IF_STACK not IF_STACK_FRAME, IHASH not
	struct include_hash, NULL not CPP_NULL_BUFFER.  Remove all
	references to cpp_buffer->fname (delete entirely, or use
	->ihash->name instead) and IF_STACK->fname.
	(cpp_push_buffer): Don't set new->underflow.
	(do_include): Use cpp_file_buffer.

	* cpphash.c (collect_formal_parameters): Remove duplicate
	increment of argslen.  Pedwarn in C99 mode if __VA_ARGS__ is
	used as a macro argument name.  Don't append "..." to namebuf
	for varargs macros.  After we're done scanning, go through
	namebuf and make it NUL separated, not comma separated.
	(_cpp_compare_defs): Remove register tag from variables.
	Expect defn->argnames to be NUL separated.
	(_cpp_dump_definition): Expect defn->argnames to be NUL
	separated and in forward order.
	* cpphash.h: Update documentation of argnames field.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32430 138bc75d-0d04-0410-961f-82ee72b054a4

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