\ skip it; otherwise unread it. IOR is non-zero if an error occured.
\ C-ADDR is a buffer that can hold at least on char.
: SKIP-\n ( c-addr fileid -- ior )
- { a f }
- a 1 f read-file ( u ior )
- ?dup
- IF \ Read error?
- nip
- ELSE ( u )
- 0=
- IF \ End of file?
- 0
- ELSE
- a c@ \n = ( is-it-a-\n? )
- IF 0
- ELSE f unread
- THEN
- THEN
- THEN
+ { a f }
+ a 1 f read-file ( u ior )
+ ?dup
+ IF \ Read error?
+ nip
+ ELSE ( u )
+ 0=
+ IF \ End of file?
+ 0
+ ELSE
+ a c@ \n = ( is-it-a-\n? )
+ IF 0
+ ELSE f unread
+ THEN
+ THEN
+ THEN
;
\ This is just s\" \n" but s\" isn't yet available.
\ one char at a time with READ-FILE hence READ-FILE should probably do
\ some form of buffering for good efficiency.
: READ-LINE ( c-addr u1 fileid -- u2 flag ior )
- { a u f }
- u 0 ?DO
- a i chars + 1 f read-file ( u ior' )
- ?dup IF nip i false rot UNLOOP EXIT THEN \ Read error? ( u )
- 0= IF i i 0> 0 UNLOOP EXIT THEN \ End of file? ( )
- a i chars + c@
- CASE
- \n OF i true 0 UNLOOP EXIT ENDOF
- \r OF
- \ Detect \r\n
- a i 1+ chars + f skip-\n ( ior )
- ?dup IF i false rot UNLOOP EXIT THEN \ IO Error? ( )
- i true 0 UNLOOP EXIT
- ENDOF
- ENDCASE
- LOOP
- \ Line doesn't fit in buffer
- u true 0
+ { a u f }
+ u 0 ?DO
+ a i chars + 1 f read-file ( u ior' )
+ ?dup IF nip i false rot UNLOOP EXIT THEN \ Read error? ( u )
+ 0= IF i i 0> 0 UNLOOP EXIT THEN \ End of file? ( )
+ a i chars + c@
+ CASE
+ \n OF i true 0 UNLOOP EXIT ENDOF
+ \r OF
+ \ Detect \r\n
+ a i 1+ chars + f skip-\n ( ior )
+ ?dup IF i false rot UNLOOP EXIT THEN \ IO Error? ( )
+ i true 0 UNLOOP EXIT
+ ENDOF
+ ENDCASE
+ LOOP
+ \ Line doesn't fit in buffer
+ u true 0
;
: WRITE-LINE ( c-addr u fileid -- ior )
- { f }
- f write-file ( ior )
- ?dup
- IF \ IO error
- ELSE line-terminator f write-file
- THEN
+ { f }
+ f write-file ( ior )
+ ?dup
+ IF \ IO error
+ ELSE line-terminator f write-file
+ THEN
;
privatize