From 9d2ef3ae156f06fd89291d4fe6edd4b806d40184 Mon Sep 17 00:00:00 2001
From: Chris Hanson <org/chris-hanson/cph>
Date: Tue, 7 Mar 2006 19:56:25 +0000
Subject: [PATCH] Implement UTF8-STRING->STRING.

---
 v7/src/runtime/runtime.pkg |  3 ++-
 v7/src/runtime/unicode.scm | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/v7/src/runtime/runtime.pkg b/v7/src/runtime/runtime.pkg
index e575a0e3e..ee20de1c1 100644
--- a/v7/src/runtime/runtime.pkg
+++ b/v7/src/runtime/runtime.pkg
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: runtime.pkg,v 14.576 2006/03/07 06:40:24 cph Exp $
+$Id: runtime.pkg,v 14.577 2006/03/07 19:56:21 cph Exp $
 
 Copyright 1988,1989,1990,1991,1992,1993 Massachusetts Institute of Technology
 Copyright 1994,1995,1996,1997,1998,1999 Massachusetts Institute of Technology
@@ -4759,6 +4759,7 @@ USA.
 	  utf32-string-length
 	  utf32-string-valid?
 	  utf32-string?
+	  utf8-string->string
 	  utf8-string->wide-string
 	  utf8-string-length
 	  utf8-string-valid?
diff --git a/v7/src/runtime/unicode.scm b/v7/src/runtime/unicode.scm
index 73308ec42..d670f6b9c 100644
--- a/v7/src/runtime/unicode.scm
+++ b/v7/src/runtime/unicode.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: unicode.scm,v 1.25 2005/12/13 15:29:52 cph Exp $
+$Id: unicode.scm,v 1.26 2006/03/07 19:56:25 cph Exp $
 
 Copyright 2001,2003,2004,2005 Massachusetts Institute of Technology
 
@@ -1059,6 +1059,18 @@ USA.
 		   (fix:or #x80 (fix:and (vector-8b-ref string i) #x3F)))
 		  (loop (fix:+ i 1) (fix:+ i* 2))))))
       string*)))
+
+(define (utf8-string->string string #!optional start end)
+  (let ((input (open-input-string string start end)))
+    (port/set-coding input 'UTF-8)
+    (call-with-output-string
+      (lambda (output)
+	(let loop ()
+	  (let ((c (read-char input)))
+	    (if (not (eof-object? c))
+		(begin
+		  (write-char c output)
+		  (loop)))))))))
 
 (define (validate-utf8-char string start end)
 
-- 
2.25.1