* cp-support.c: Include "safe-ctype.h".

	(cp_already_canonical): New function.
	(cp_canonicalize_string): Use it.  Return NULL for already canonical
	strings.
	(mangled_name_to_comp): Update call to cp_demangled_name_to_comp.
	(cp_func_name, remove_params): Likewise.
	(cp_find_first_component_aux): Use ISSPACE.
	* cp-support.h (cp_demangled_name_to_comp): Correct comment.  Remove
	MEMORY_P argument.
	* cp-name-parser.y (ALLOC_CHUNK): Define.
	(struct demangle_info): Add PREV and NEXT.  Increase the size of
	COMPS.
	(d_grab): Convert to a function.
	(allocate_info): Rewrite.
	(cp_demangled_name_to_comp): Remove MEMORY argument.  Do not use
	strlen.  Update call to allocate_info.  Do not free it on failure.
	(main): Update calls to cp_demangled_name_to_comp.
	* Makefile.in (cp-support.o): Update.