+: RENAME-FILE ( c-addr1 u1 c-addr2 u2 -- ior )
+ { a1 u1 a2 u2 | new }
+ \ Convert the file-names to C-strings by copying them after HERE.
+ a1 u1 here place-cstr
+ here u1 1+ chars + to new
+ a2 u2 new place-cstr
+ here new (rename-file) 0=
+ IF 0
+ ELSE throw_rename_file
+ THEN
+;
+
+: ( ( "comment<rparen>" -- )
+ source-id
+ CASE
+ -1 OF postpone ( ENDOF
+ 0 OF postpone ( ENDOF
+ \ for input from files
+ multi-line-comment
+ ENDCASE
+; immediate
+
+\ We basically try to open the file in read-only mode. That seems to
+\ be the best that we can do with ANSI C. If we ever want to do
+\ something more sophisticated, like calling access(2), we must create
+\ a proper primitive. (OTOH, portable programs can't assume much
+\ about FILE-STATUS and non-portable programs could create a custom
+\ function for access(2).)
+: FILE-STATUS ( c-addr u -- 0 ior )
+ r/o bin open-file ( fileid ior1 )
+ ?dup
+ IF nip 0 swap ( 0 ior1 )
+ ELSE close-file 0 swap ( 0 ior2 )
+ THEN
+;
+