r2912: rename .cl to .lisp

[uffi.git] / tests / strtol.lisp

diff --git a/tests/strtol.lisp b/tests/strtol.lisp
new file mode 100644 (file)
index 0000000..c2956e3
--- /dev/null
+++ b/tests/strtol.lisp
@@ -0,0 +1,83 @@
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          strtol.cl
+;;;; Purpose:       UFFI Example file to strtol, uses pointer arithmetic
+;;;; 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 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) 
+    ((nptr char-ptr)
+     (endptr (* char-ptr))
+     (base :int))
+  :returning :long)
+
+(defun strtol (str &optional (base 10))
+  "Returns a long int from a string. Returns number and condition flag.
+Condition flag is T if all of string parses as a long, NIL if
+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)))
+
+    (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)))))
+      (progn
+       (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))))
+    (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")))
+    (test-strtol "123" '(123 t))
+    (test-strtol "0" '(0 t))
+    (test-strtol "55a" '(55 2))
+    (test-strtol "a" '(nil nil))))
+
+                          
+