r4938: Auto commit for Debian build

[kmrcl.git] / strings.lisp

diff --git a/strings.lisp b/strings.lisp
index 6348eecdc4cbbc30cd4aa04adbb7beadf7b5916c..937f67039e45bbc9225ad25df9866ead8c479c22 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: strings.lisp,v 1.26 2003/05/11 21:51:44 kevin Exp $
+;;;; $Id: strings.lisp,v 1.27 2003/05/14 21:31:42 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -253,3 +253,24 @@ list of characters and replacement strings."
       (write-string elem strm)
       (unless (and last-elem last-list)
        (write-string separator strm)))))
+
+(defun prefixed-fixnum-string (num pchar len)
+  "Outputs a string of LEN chars with the initial character being
+PCHAR. Leading zeros are printed."
+  (declare (optimize (speed 3) (safety 0) (space 0))
+          (type fixnum v len))
+  (let ((zero-code (char-code #\0))
+       (result (make-string len :initial-element #\0))
+       (pos (1- len)))
+    (declare (fixnum zero-code pos)
+            (simple-string result))
+    (do* ((val num (floor (/ val 10)))
+         (mod (nth-value 1 (floor val 10))
+              (nth-value 1 (floor val 10))))
+        ((or (zerop val) (minusp pos)))
+      (declare (fixnum val mod))
+      (setf (schar result pos) (code-char (+ zero-code mod)))
+      (decf pos))
+    (when pchar
+      (setf (schar result 0) pchar))
+    result))