create (LINE-TERMINATOR) \n c,
: LINE-TERMINATOR ( -- c-addr u ) (line-terminator) 1 ;
+\ Standard throw code
+\ See: http://lars.nocrew.org/forth2012/exception.html#table:throw
-72 constant THROW_RENAME_FILE
+\ Copy the string C-ADDR/U1 to C-ADDR2 and append a NUL.
+: PLACE-CSTR ( c-addr1 u1 c-addr2 -- )
+ 2dup 2>r ( c-addr1 u1 c-addr2 ) ( r: u1 c-addr2 )
+ swap cmove ( ) ( r: u1 c-addr2 )
+ 0 2r> + c! ( )
+;
+
+: MULTI-LINE-COMMENT ( "comment<rparen>" -- )
+ BEGIN
+ >in @ ')' parse ( >in c-addr len )
+ nip + >in @ = ( delimiter-not-found? )
+ WHILE ( )
+ refill 0= IF EXIT THEN ( )
+ REPEAT
+;
+
}private
\ This treats \n, \r\n, and \r as line terminator. Reading is done
: 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
- \ with trailing zeros added.
- a1 here u1 move
- 0 here u1 chars + c!
+ \ Convert the file-names to C-strings by copying them after HERE.
+ a1 u1 here place-cstr
here u1 1+ chars + to new
- a2 new u2 move
- 0 new u2 chars + c!
+ 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
+;
+
privatize