From 8466d8cfa486fb30d1755c4261b781135083787b Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 20 Feb 2017 00:05:29 -0800
Subject: Import Upstream version 3a1

---
 RScheme.init | 50 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 45 insertions(+), 5 deletions(-)

(limited to 'RScheme.init')

diff --git a/RScheme.init b/RScheme.init
index c03119c..b9a7d84 100644
--- a/RScheme.init
+++ b/RScheme.init
@@ -54,6 +54,19 @@
 	    (else "")))))
     (lambda () library-path)))
 
+;;; (home-vicinity) should return the vicinity of the user's HOME
+;;; directory, the directory which typically contains files which
+;;; customize a computer environment for a user.
+(define (home-vicinity)
+  (let ((home (getenv "HOME")))
+    (and home
+	 (case (software-type)
+	   ((UNIX COHERENT MS-DOS)	;V7 unix has a / on HOME
+	    (if (eqv? #\/ (string-ref home (+ -1 (string-length home))))
+		home
+		(string-append home "/")))
+	   (else home)))))
+
 ;;; *FEATURES* should be set to a list of symbols describing features
 ;;; of this implementation.  Suggestions for features are:
 
@@ -66,7 +79,7 @@
 
 		       ;; Scheme report features
 
-;	rev5-report			;conforms to
+;	r5rs				;conforms to
 ;	eval				;R5RS two-argument eval
 ;	values				;R5RS multiple values
 ;	dynamic-wind			;R5RS dynamic-wind
@@ -80,11 +93,11 @@
 					;STRING-FILL!, LIST->VECTOR,
 					;VECTOR->LIST, and VECTOR-FILL!
 
-	rev4-report			;conforms to
+	r4rs				;conforms to
 
 	ieee-p1178			;conforms to
 
-;	rev3-report			;conforms to
+;	r3rs				;conforms to
 
 ;	rev2-procedures			;SUBSTRING-MOVE-LEFT!,
 					;SUBSTRING-MOVE-RIGHT!,
@@ -95,7 +108,7 @@
 
 	multiarg/and-			;/ and - can take more than 2 args.
 	with-file			;has WITH-INPUT-FROM-FILE and
-					;WITH-OUTPUT-FROM-FILE
+					;WITH-OUTPUT-TO-FILE
 ;	transcript			;TRANSCRIPT-ON and TRANSCRIPT-OFF
 ;	ieee-floating-point		;conforms to IEEE Standard 754-1985
 					;IEEE Standard for Binary
@@ -160,6 +173,33 @@
 ;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
 ;;; port versions of CALL-WITH-*PUT-FILE.
 
+(define (make-exchanger obj)
+  (lambda (rep) (let ((old obj)) (set! obj rep) old)))
+(define (open-file filename modes)
+  (case modes
+    ((r rb) (open-input-file filename))
+    ((w wb) (open-output-file filename))
+    (else (slib:error 'open-file 'mode? modes))))
+(define (port? obj) (or (input-port? port) (output-port? port)))
+(define (call-with-open-ports . ports)
+  (define proc (car ports))
+  (cond ((procedure? proc) (set! ports (cdr ports)))
+	(else (set! ports (reverse ports))
+	      (set! proc (car ports))
+	      (set! ports (reverse (cdr ports)))))
+  (let ((ans (apply proc ports)))
+    (for-each close-port ports)
+    ans))
+(define (close-port port)
+  (cond ((input-port? port)
+	 (close-input-port port)
+	 (if (output-port? port) (close-output-port port)))
+	((output-port? port) (close-output-port port))
+	(else (slib:error 'close-port 'port? port))))
+
+(define (browse-url url)
+  (slib:warn "define BROWSE-URL in macscheme.init"))
+
 ;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
 ;;; be returned by CHAR->INTEGER.
 (define char-code-limit 65536)
@@ -232,7 +272,7 @@
     (let ((cep (current-error-port)))
       (if (provided? 'trace) (print-call-stack cep))
       (display "Warn: " cep)
-      (for-each (lambda (x) (display x cep)) args))))
+      (for-each (lambda (x) (display #\  cep) (write x cep)) args))))
 
 ;;; define an error procedure for the library
 (define (slib:error msg . args)
-- 
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