X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Fgray-streams.impure.lisp;h=ab827debdfc3c3db90856724d6f6cfc82d4f6d3e;hb=cf49f2d086069a9c1b57f501df9a6a0bd3a34c3c;hp=f20c68b5fe674ad382ceaaa68da8fd8b363fe902;hpb=175c318c892b0627b36fa3c4db66f59680242204;p=sbcl.git

diff --git a/tests/gray-streams.impure.lisp b/tests/gray-streams.impure.lisp
index f20c68b..ab827de 100644
--- a/tests/gray-streams.impure.lisp
+++ b/tests/gray-streams.impure.lisp
@@ -60,7 +60,8 @@
 
 (defclass character-output-stream (fundamental-character-output-stream)
   ((lisp-stream :initarg :lisp-stream
-                :accessor character-output-stream-lisp-stream)))
+                :accessor character-output-stream-lisp-stream)
+   (position :initform 42 :accessor character-output-stream-position)))
 
 (defclass character-input-stream (fundamental-character-input-stream)
   ((lisp-stream :initarg :lisp-stream
@@ -100,6 +101,11 @@
 
 (defmethod stream-clear-output ((stream character-output-stream))
   (clear-output (character-output-stream-lisp-stream stream)))
+
+(defmethod stream-file-position ((stream character-output-stream) &optional new-value)
+  (if new-value
+      (setf (character-output-stream-position stream) new-value)
+      (character-output-stream-position stream)))
 
 ;;;; example character input stream encapsulating a lisp-stream
 
@@ -271,3 +277,62 @@
                      ((eq byte :eof))
                    (write-byte byte our-bin-to-char-output))))
              test-string))))
+
+
+
+;;; Minimal test of file-position
+(let ((stream (make-instance 'character-output-stream)))
+  (assert (= (file-position stream) 42))
+  (assert (file-position stream 50))
+  (assert (= (file-position stream) 50)))
+
+;;; Using gray streams as parts of two-way-, concatenate-, and synonym-streams.
+
+(defvar *gray-binary-data*
+  (let ((vector (make-array 1024 :element-type '(unsigned-byte 8) :fill-pointer 0)))
+    (dotimes (i (length vector))
+      (setf (aref vector i) (random 256)))
+    vector))
+
+(defun vector-hop-or-eof (vector)
+  (let ((pos (fill-pointer vector)))
+    (if (< pos (array-total-size vector))
+        (prog1
+            (aref vector pos)
+          (incf (fill-pointer vector)))
+        :eof)))
+
+(defclass part-of-composite-stream (fundamental-binary-input-stream)
+  ())
+
+(defmethod stream-read-byte ((stream part-of-composite-stream))
+  (vector-hop-or-eof *gray-binary-data*))
+
+(defmethod stream-element-type ((stream part-of-composite-stream))
+  '(unsigned-byte 8))
+
+(defvar *part-of-composite* (make-instance 'part-of-composite-stream))
+
+(defun test-composite-reads (&rest streams)
+  (dolist (stream streams)
+    (setf (fill-pointer *gray-binary-data*) 0)
+    (let ((binary-buffer (make-array 1024 :element-type '(unsigned-byte 8))))
+      (assert (eql 1024 (read-sequence binary-buffer stream)))
+      (dotimes (i 1024)
+        (unless (eql (aref *gray-binary-data* i)
+                     (aref binary-buffer i))
+          (error "wanted ~S at ~S, got ~S (~S)"
+                 (aref *gray-binary-data* i)
+                 i
+                 (aref binary-buffer i)
+                 stream))))))
+
+(test-composite-reads
+ (make-two-way-stream *part-of-composite* *standard-output*)
+ (make-concatenated-stream *part-of-composite*)
+ (make-synonym-stream '*part-of-composite*))
+
+;;; Using STREAM-FILE-POSITION on an ANSI-STREAM
+(with-output-to-string (s)
+  (assert (zerop (file-position s)))
+  (assert (zerop (stream-file-position s))))