* cpplex.c (cpp_output_tokens, cpp_scan_buffer_nooutput): New public

	* cpplex.c (cpp_output_tokens, cpp_scan_buffer_nooutput): New public
	interfaces.
	(safe_fwrite, output_line_command): New static functions.
	(cpp_expand_to_buffer): Now private to cpplib.
	(cpp_scan_buffer): Take a printer.

	* cpphash.h: Update prototypes.
	* cpplib.h: Update prototypes.
	(cpp_printer): New.
	(cpp_buffer): Remove last_nominal_fname.
	(cpp_reader): Remove lineno.

	* cppmain.c: Use a cpp_printer.
	* fix-header.c: No need to inhibit line commands.  Call
	cpp_start_read with no printer.

	* cpperror.c (cpp_notice_from_errno): Provide default name.
	* cppfiles.c (make_IHASH, _cpp_fake_ihash): New functions.
	(find_include_file, cpp_read_file): Use make_IHASH.
	(file_cleanup): Set control_macro and clear
	input_stack_listing_current here.
	(_cpp_execute_include): Don't output entering-file marker.
	* cpphash.c (special_symbol): Look for the line number in the
	buffer, not the reader.
	(_cpp_macroexpand): No need to disable line commands.
	(_cpp_dump_definition): No need to generate line commands.
	(dump_hash_helper): Remove excess newline from output.
	* cppinit.c (dump_special_to_buffer): No need to generate line
	commands.
	(cpp_printer_init): New.
	(cpp_start_read): Take a printer, and start it up if it's not
	NULL.  No need to generate line commands.
	(cpp_finish): Expect no buffers stacked at all.  Take a
	printer argument, and flush the output buffer if it's not
	NULL.
	* cpplex.c (_cpp_lex_token): Return EOF if there's no buffer.
	Don't put two hashes at the beginning of an assertion.
	(cpp_get_token): Don't increment pfile->lineno or emit line
	commands here.  Return EOF if there's no buffer when we get
	EOF.
	* cpplib.c (do_define, skip_if_group):
	No need to disable line commands.
	(_cpp_output_line_command): Delete function.
	(do_line): Don't emit line commands here, but set things up so
	they will be emitted if necessary.  Use _cpp_fake_ihash to
	make unique nominal_fnames if necessary.
	(do_elif, do_else, _cpp_handle_eof): Call cpp_error_with_line
	with 0 for column, not -1.
	(_cpp_handle_eof): Don't set the control macro here.  Don't
	clear input_stack_listing_current here.  Don't emit line
	commands.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33159 138bc75d-0d04-0410-961f-82ee72b054a4