;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id: strtol.lisp,v 1.1 2002/09/30 10:02:36 kevin Exp $
+;;;; This file, part of UFFI, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
;;;;
-;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
-;;;;
-;;;; UFFI users are granted the rights to distribute and use this software
-;;;; as governed by the terms of the Lisp Lesser GNU Public License
-;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
;;;; *************************************************************************
(in-package :cl-user)
(uffi:def-foreign-type char-ptr (* :unsigned-char))
-
+
;; This example does not use :cstring to pass the input string since
;; the routine needs to do pointer arithmetic to see how many characters
;; were parsed
-(uffi:def-function ("strtol" c-strtol)
+(uffi:def-function ("strtol" c-strtol)
((nptr char-ptr)
(endptr (* char-ptr))
(base :int))
their was no string at all, or an integer indicating position in string
of first non-valid character"
(let* ((str-native (uffi:convert-to-foreign-string str))
- (endptr (uffi:allocate-foreign-object 'char-ptr))
- (value (c-strtol str-native endptr base))
- (endptr-value (uffi:deref-pointer endptr 'char-ptr)))
+ (endptr (uffi:allocate-foreign-object 'char-ptr))
+ (value (c-strtol str-native endptr base))
+ (endptr-value (uffi:deref-pointer endptr 'char-ptr)))
(unwind-protect
- (if (uffi:null-pointer-p endptr-value)
- (values value t)
- (let ((next-char-value (uffi:deref-pointer endptr-value :unsigned-char))
- (chars-parsed (- (uffi:pointer-address endptr-value)
- (uffi:pointer-address str-native))))
- (cond
- ((zerop chars-parsed)
- (values nil nil))
- ((uffi:null-char-p next-char-value)
- (values value t))
- (t
- (values value chars-parsed)))))
+ (if (uffi:null-pointer-p endptr-value)
+ (values value t)
+ (let ((next-char-value (uffi:deref-pointer endptr-value :unsigned-char))
+ (chars-parsed (- (uffi:pointer-address endptr-value)
+ (uffi:pointer-address str-native))))
+ (cond
+ ((zerop chars-parsed)
+ (values nil nil))
+ ((uffi:null-char-p next-char-value)
+ (values value t))
+ (t
+ (values value chars-parsed)))))
(progn
- (uffi:free-foreign-object str-native)
- (uffi:free-foreign-object endptr)))))
+ (uffi:free-foreign-object str-native)
+ (uffi:free-foreign-object endptr)))))
+
+
-
-
#+examples-uffi
(progn
(flet ((print-results (str)
- (multiple-value-bind (result flag) (strtol str)
- (format t "~&(strtol ~S) => ~S,~S" str result flag))))
+ (multiple-value-bind (result flag) (strtol str)
+ (format t "~&(strtol ~S) => ~S,~S" str result flag))))
(print-results "55")
(print-results "55.3")
(print-results "a")))
#+test-uffi
(progn
(flet ((test-strtol (str results)
- (util.test:test (multiple-value-list (strtol str)) results
- :test #'equal
- :fail-info "Error testing strtol")))
+ (util.test:test (multiple-value-list (strtol str)) results
+ :test #'equal
+ :fail-info "Error testing strtol")))
(test-strtol "123" '(123 t))
(test-strtol "0" '(0 t))
(test-strtol "55a" '(55 2))
(test-strtol "a" '(nil nil))))
-
+