Add (syntax-highlight utils) module.

* syntax-highlight.scm (string->stream): Move it.
* syntax-highlight/parsers.scm (stream->string): Likewise.
* syntax-highlight/utils.scm: New file.
* Makefile.am (SOURCES): Add it.

1 files changed, 37 insertions, 0 deletions

diff --git a/syntax-highlight/utils.scm b/syntax-highlight/utils.scm
new file mode 100644
index 0000000..a400a8e
--- /dev/null
+++ b/syntax-highlight/utils.scm
@@ -0,0 +1,37 @@
+;;; guile-syntax-highlight -- General-purpose syntax highlighter
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; Guile-syntax-highlight is free software; you can redistribute it
+;;; and/or modify it under the terms of the GNU Lesser General Public
+;;; License as published by the Free Software Foundation; either
+;;; version 3 of the License, or (at your option) any later version.
+;;;
+;;; Guile-syntax-highlight is distributed in the hope that it will be
+;;; useful, but WITHOUT ANY WARRANTY; without even the implied
+;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+;;; See the GNU Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-syntax-highlight.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Utility procedures.
+;;
+;;; Code:
+
+(define-module (syntax-highlight utils)
+  #:use-module (srfi srfi-41)
+  #:export (string->stream
+            stream->string))
+
+(define (string->stream str)
+  "Convert the string STR into a stream of characters."
+  (stream-map (lambda (i)
+                (string-ref str i))
+              (stream-range 0 (string-length str))))
+
+(define (stream->string stream)
+  "Convert STREAM, a SRFI-41 stream of characters, into a string."
+  (list->string (stream->list stream)))