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-rw-r--r--module/rnrs/io/ports.scm13
1 files changed, 13 insertions, 0 deletions
diff --git a/module/rnrs/io/ports.scm b/module/rnrs/io/ports.scm
index 89dc26509..4916bba45 100644
--- a/module/rnrs/io/ports.scm
+++ b/module/rnrs/io/ports.scm
@@ -39,6 +39,7 @@
;; input ports
open-bytevector-input-port
+ open-string-input-port
make-custom-binary-input-port
;; binary input
@@ -48,6 +49,7 @@
;; output ports
open-bytevector-output-port
+ open-string-output-port
make-custom-binary-output-port
;; binary output
@@ -106,4 +108,15 @@ read from/written to in @var{port}."
(lambda ()
(close-port port))))
+(define (open-string-input-port str)
+ "Open an input port that will read from @var{str}."
+ (open-input-string str))
+
+(define (open-string-output-port)
+ "Return two values: an output port that will collect characters written to it
+as a string, and a thunk to retrieve the characters associated with that port."
+ (let ((port (open-output-string)))
+ (values port
+ (lambda () (get-output-string port)))))
+
;;; ports.scm ends here