restoring efficient read-line

lib/chibi/io/io.scm

@@ -75,9 +75,11 @@
 ;;> a string not including the newline.  Reads at most \var{n}
 ;;> characters, defaulting to 8192.
 
-(cond-expand
- ((not string-streams)
 (define (%read-line n in)
+  (cond
+   ((port-fileno in)
+    (%%read-line n in))
+   (else
     (let ((out (open-output-string)))
       (let lp ((i 0))
         (let ((ch (peek-char in)))
@@ -128,9 +130,11 @@
 ;;> than \var{n} characters if the end of file is reached,
 ;;> or the eof-object if no characters are available.
 
-(cond-expand
- ((not string-streams)
 (define (%read-string n in)
+  (cond
+   ;;((port-fileno in)
+   ;; (%%read-string n in))
+   (else
     (let ((out (open-output-string)))
       (let lp ((i 0))
         (cond ((or (= i n) (eof-object? (peek-char in)))
@@ -159,9 +163,11 @@
 ;;> An error is signalled if the length of \var{str} is smaller
 ;;> than \var{n}.
 
-(cond-expand
- ((not string-streams)
 (define (%read-string! str n in)
+  (cond
+   ;;((port-fileno in)
+   ;; (%%read-string! str n in))
+   (else
     (let lp ((i 0))
       (cond ((or (= i n) (eof-object? (peek-char in))) i)
             (else (string-set! str i (read-char in)) (lp (+ i 1))))))))

lib/chibi/io/io.stub

@@ -1,15 +1,12 @@
 
-(cond-expand
+(define-c non-null-string (%%read-line "fgets")
- (string-streams
-  (define-c non-null-string (%read-line "fgets")
   ((result (array char arg1)) int (default (current-input-port) input-port)))
 
-  (define-c size_t (%read-string "fread")
+;;(define-c size_t (%%read-string "fread")
-    ((result (array char (result arg2))) (value 1 size_t) size_t (default (current-input-port) input-port)))
+;;  ((result (array char (result arg2))) (value 1 size_t) size_t (default (current-input-port) input-port)))
 
-  (define-c size_t (%read-string! "fread")
+;;(define-c size_t (%%read-string! "fread")
-    (string (value 1 size_t) size_t (default (current-input-port) input-port)))
+;;  (string (value 1 size_t) size_t (default (current-input-port) input-port)))
-  ))
 
 (c-include-verbatim "port.c")
 

sexp.c

@@ -482,6 +482,9 @@ static const char* sexp_initial_features[] = {
 #if SEXP_USE_UTF8_STRINGS
   "full-unicode",
 #endif
+#if SEXP_USE_STRING_INDEX_TABLE
+  "string-index",
+#endif
 #if SEXP_USE_GREEN_THREADS
   "threads",
 #endif