r4972: Automatic commit for debian_version_1_46-1

[kmrcl.git] / strings.lisp

diff --git a/strings.lisp b/strings.lisp
index a34ec58d02cda17f23b52136980164a17d89ab3d..b3a3d018a7cb557099df5137a89564329424472f 100644 (file)
--- a/strings.lisp
+++ b/strings.lisp
@@ -1,4 +1,4 @@
-;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+<;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
 ;;;; *************************************************************************
 ;;;; FILE IDENTIFICATION
 ;;;;
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: strings.lisp,v 1.28 2003/05/15 05:16:06 kevin Exp $
+;;;; $Id: strings.lisp,v 1.29 2003/05/16 08:32:10 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -274,3 +274,24 @@ Leading zeros are present."
        result)
     (declare (fixnum val mod zero-code pos) (simple-string result))
     (setf (schar result pos) (code-char (+ zero-code mod)))))
+
+(defun integer-string (num len)
+  "Outputs a string of LEN digit with an optional initial character PCHAR.
+Leading zeros are present."
+  (declare (optimize (speed 3) (safety 0) (space 0))
+          (type fixnum len) (type integer num))
+  (when pchar
+    (incf len))
+  (do* ((zero-code (char-code #\0))
+       (result (make-string len :initial-element #\0))
+       (minus? (minusp num))
+       (val (if minus? (- 0 num) num) (floor (/ val 10)))
+       (pos (1- len) (1- pos))
+       (mod (mod val 10) (mod val 10)))
+      ((or (zerop val) (minusp pos))
+       (when pchar
+        (setf (schar result 0) pchar))
+       (when minus? (setf (schar result (if pchar 1 0)) #\-))
+       result)
+    (declare (fixnum mod zero-code pos) (simple-string result) (integer val))
+    (setf (schar result pos) (code-char (+ zero-code mod)))))