Remove eof slot

extra/io/ports/ports-docs.factor

@@ -65,10 +65,6 @@ HELP: wait-to-read
 { $values { "port" input-port } }
 { $description "If the port's buffer has unread data, returns immediately, otherwise suspends the current thread until some data is available for reading." } ;
 
-HELP: unless-eof
-{ $values { "port" input-port } { "quot" "a quotation with stack effect " { $snippet "( port -- value )" } } { "value" object } }
-{ $description "If the port has reached end of file, outputs " { $link f } ", otherwise applies the quotation to the port." } ;
-
 HELP: can-write?
 { $values { "len" "a positive integer" } { "buffer" buffer } { "?" "a boolean" } }
 { $description "Tests if the port's output buffer can accomodate " { $snippet "len" } " bytes. If the buffer is empty, this always outputs " { $link t } ", since in that case the buffer will be grown automatically." } ;

extra/io/ports/ports.factor

@@ -25,27 +25,24 @@ TUPLE: buffered-port < port buffer ;
     <port>
         default-buffer-size get <buffer> >>buffer ; inline
 
-TUPLE: input-port < buffered-port eof ;
+TUPLE: input-port < buffered-port ;
 
 : <input-port> ( handle -- input-port )
     input-port <buffered-port> ;
 
 HOOK: (wait-to-read) io-backend ( port -- )
 
-: wait-to-read ( port -- )
-    dup buffer>> buffer-empty? [ (wait-to-read) ] [ drop ] if ;
-
-: unless-eof ( port quot -- value )
-    >r dup buffer>> buffer-empty? over eof>> and
-    [ f >>eof drop f ] r> if ; inline
+: wait-to-read ( port -- eof? )
+    dup buffer>> buffer-empty? [
+        dup (wait-to-read) buffer>> buffer-empty?
+    ] [ drop f ] if ;
 
 M: input-port stream-read1
     dup check-disposed
-    dup wait-to-read [ buffer>> buffer-pop ] unless-eof ;
+    dup wait-to-read [ drop f ] [ buffer>> buffer-pop ] if ;
 
 : read-step ( count port -- byte-array/f )
-    [ wait-to-read ] keep
-    [ dupd buffer>> buffer-read ] unless-eof nip ;
+    dup wait-to-read [ 2drop f ] [ buffer>> buffer-read ] if ;
 
 M: input-port stream-read-partial ( max stream -- byte-array/f )
     dup check-disposed

extra/io/unix/backend/backend.factor

@@ -108,9 +108,6 @@ M: io-timeout summary drop "I/O operation timed out" ;
 : io-error ( n -- ) 0 < [ (io-error) ] when ;
  
 ! Readers
-: eof ( reader -- )
-    dup buffer>> buffer-empty? [ t >>eof ] when drop ;
-
 : (refill) ( port -- n )
     [ handle>> ]
     [ buffer>> buffer-end ]
@@ -123,8 +120,7 @@ GENERIC: refill ( port handle -- event/f )
 M: fd refill
     fd>> over buffer>> [ buffer-end ] [ buffer-capacity ] bi read
     {
-        { [ dup 0 = ] [ drop eof f ] }
-        { [ dup 0 > ] [ swap buffer>> n>buffer f ] }
+        { [ dup 0 >= ] [ swap buffer>> n>buffer f ] }
         { [ err_no EINTR = ] [ 2drop +retry+ ] }
         { [ err_no EAGAIN = ] [ 2drop +input+ ] }
         [ (io-error) ]

extra/io/unix/linux/monitors/monitors.factor

@@ -111,7 +111,7 @@ M: linux-monitor dispose* ( monitor -- )
 
 : inotify-read-loop ( port -- )
     dup check-disposed
-    dup wait-to-read
+    dup wait-to-read drop
     0 over buffer>> parse-file-notifications
     0 over buffer>> buffer-reset
     inotify-read-loop ;

extra/io/unix/sockets/secure/secure.factor

@@ -30,7 +30,7 @@ M: ssl-handle handle-fd file>> handle-fd ;
     check-response
     {
         { SSL_ERROR_NONE [ swap buffer>> n>buffer f ] }
-        { SSL_ERROR_ZERO_RETURN [ drop eof f ] }
+        { SSL_ERROR_ZERO_RETURN [ 2drop f ] }
         { SSL_ERROR_WANT_READ [ 2drop +input+ ] }
         { SSL_ERROR_WANT_WRITE [ 2drop +output+ ] }
         { SSL_ERROR_SYSCALL [ syscall-error ] }

extra/io/windows/nt/backend/backend.factor

@@ -110,11 +110,7 @@ M: winnt (wait-to-write)
     ] with-destructors ;
 
 : finish-read ( n port -- )
-    over zero? [
-        t >>eof 2drop
-    ] [
-        [ buffer>> n>buffer ] [ update-file-ptr ] 2bi
-    ] if ;
+    [ update-file-ptr ] [ buffer>> n>buffer ] 2bi ;
 
 M: winnt (wait-to-read) ( port -- )
     [