Fix stream-read-until on byte-readers

basis/io/streams/byte-array/byte-array-tests.factor

@@ -1,5 +1,5 @@
 USING: tools.test io.streams.byte-array io.encodings.binary
-io.encodings.utf8 io kernel arrays strings ;
+io.encodings.utf8 io kernel arrays strings namespaces ;
 
 [ B{ 1 2 3 } ] [ binary [ { 1 2 3 } write ] with-byte-writer ] unit-test
 [ B{ 1 2 3 } ] [ { 1 2 3 } binary [ 3 read ] with-byte-reader ] unit-test
@@ -7,3 +7,23 @@ io.encodings.utf8 io kernel arrays strings ;
 [ B{ BIN: 11110101 BIN: 10111111 BIN: 10000000 BIN: 10111111 BIN: 11101111 BIN: 10000000 BIN: 10111111 BIN: 11011111 BIN: 10000000 CHAR: x } ]
 [ { BIN: 101111111000000111111 BIN: 1111000000111111 BIN: 11111000000 CHAR: x } utf8 [ write ] with-byte-writer ] unit-test
 [ { BIN: 101111111000000111111 } t ] [ { BIN: 11110101 BIN: 10111111 BIN: 10000000 BIN: 10111111 } utf8 <byte-reader> contents dup >array swap string? ] unit-test
+
+[ B{ 121 120 } 0 ] [
+    B{ 0 121 120 0 0 0 0 0 0 } binary
+    [ 1 read drop "\0" read-until ] with-byte-reader
+] unit-test
+
+[ 1 1 4 11 f ] [
+    B{ 1 2 3 4 5 6 7 8 9 10 11 12 } binary
+    [
+        read1
+        0 seek-absolute input-stream get stream-seek
+        read1
+        2 seek-relative input-stream get stream-seek
+        read1
+        -2 seek-end input-stream get stream-seek
+        read1
+        0 seek-end input-stream get stream-seek
+        read1
+    ] with-byte-reader
+] unit-test

basis/io/streams/byte-array/byte-array.factor

@@ -28,7 +28,7 @@ M: byte-reader stream-seek ( n seek-type stream -- )
     swap {
         { seek-absolute [ (>>i) ] }
         { seek-relative [ [ + ] change-i drop ] }
-        { seek-end [ dup underlying>> length >>i [ + ] change-i drop ] }
+        { seek-end [ [ underlying>> length + ] keep (>>i) ] }
         [ bad-seek-type ]
     } case ;
 

core/io/streams/sequence/sequence.factor

@@ -15,11 +15,10 @@ SLOT: i
     [ 1+ ] change-i drop ; inline
 
 : sequence-read1 ( stream -- elt/f )
-    [ >sequence-stream< ?nth ]
-    [ next ] bi ; inline
+    [ >sequence-stream< ?nth ] [ next ] bi ; inline
 
 : add-length ( n stream -- i+n )
-    [ i>> + ] [ underlying>> length ] bi min  ; inline
+    [ i>> + ] [ underlying>> length ] bi min ; inline
 
 : (sequence-read) ( n stream -- seq/f )
     [ add-length ] keep
@@ -32,8 +31,8 @@ SLOT: i
     [ (sequence-read) ] [ 2drop f ] if ; inline
 
 : find-sep ( seps stream -- sep/f n )
-    swap [ >sequence-stream< ] dip
-    [ memq? ] curry find-from swap ; inline
+    swap [ >sequence-stream< swap tail-slice ] dip
+    [ memq? ] curry find swap ; inline
 
 : sequence-read-until ( separators stream -- seq sep/f )
     [ find-sep ] keep