1 files changed, 58 insertions, 0 deletions
diff --git a/stdlib/with-stream.tl b/stdlib/with-stream.tl
new file mode 100644
index 00000000..2904ea3d
--- /dev/null
+++ b/stdlib/with-stream.tl
@@ -0,0 +1,58 @@
+;; Copyright 2015-2021
+;; Kaz Kylheku <kaz@kylheku.com>
+;; Vancouver, Canada
+;; All rights reserved.
+;;
+;; Redistribution and use in source and binary forms, with or without
+;; modification, are permitted provided that the following conditions are met:
+;;
+;; 1. Redistributions of source code must retain the above copyright notice, this
+;;    list of conditions and the following disclaimer.
+;;
+;; 2. Redistributions in binary form must reproduce the above copyright notice,
+;;    this list of conditions and the following disclaimer in the documentation
+;;    and/or other materials provided with the distribution.
+;;
+;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+;; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+(defmacro with-out-string-stream ((stream) . body)
+  ^(let ((,stream (make-string-output-stream)))
+     ,*body
+     (get-string-from-stream ,stream)))
+
+(defmacro with-out-strlist-stream ((stream) . body)
+  ^(let ((,stream (make-strlist-output-stream)))
+     ,*body
+     (get-list-from-stream ,stream)))
+
+(defmacro with-out-buf-stream ((stream : buf) . body)
+  ^(let ((,stream (make-buf-stream ,*[[iff have list] buf])))
+     ,*body
+     (get-buf-from-stream ,stream)))
+
+(defmacro with-in-string-stream ((stream string) . body)
+  ^(let ((,stream (make-string-input-stream ,string)))
+     ,*body))
+
+(defmacro with-in-string-byte-stream ((stream string) . body)
+  ^(let ((,stream (make-string-byte-input-stream ,string)))
+     ,*body))
+
+(defmacro with-in-buf-stream ((stream buf) . body)
+  ^(let ((,stream (make-buf-stream ,buf)))
+     ,*body))
+
+(defmacro with-stream ((sym stream) . body)
+  ^(let ((,sym ,stream))
+     (unwind-protect
+       (progn ,*body)
+       (close-stream ,sym))))