X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=src%2Flibraries.cl;h=e5bb757ba1029780c30b08995d544341678f19b9;hb=79cd30e5bb24c5a8d2eea188e15109e544f8638b;hp=8943587db1197e6d4d55907529a672a4f9818383;hpb=76ae1bdbadaaf87603ebbe987e59dd1a105f1872;p=uffi.git

diff --git a/src/libraries.cl b/src/libraries.cl
index 8943587..e5bb757 100644
--- a/src/libraries.cl
+++ b/src/libraries.cl
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Feb 2002
 ;;;;
-;;;; $Id: libraries.cl,v 1.4 2002/03/16 22:54:06 kevin Exp $
+;;;; $Id: libraries.cl,v 1.11 2002/04/01 20:40:36 kevin Exp $
 ;;;;
 ;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -22,7 +22,55 @@
 (defvar *loaded-libraries* nil
   "List of foreign libraries loaded. Used to prevent reloading a library")
 
-(defun load-foreign-library (filename &key module supporting-libraries)
+(defun default-foreign-library-type ()
+  "Returns string naming default library type for platform"
+  #+(or win32 mswindows) "dll"
+  #-(or win32 mswindows) "so")
+
+(defun find-foreign-library (names directories &key types drive-letters)  
+  "Looks for a foreign library. directories can be a single
+string or a list of strings of candidate directories. Use default
+library type if type is not specified."
+  (unless types
+    (setq types (default-foreign-library-type)))
+  (unless (listp types)
+    (setq types (list types)))
+  (unless (listp names)
+    (setq names (list names)))
+  (unless (listp directories)
+    (setq directories (list directories)))
+  #+(or win32 mswindows)
+  (unless (listp drive-letters)
+    (setq drive-letters (list drive-letters)))
+  #-(or win32 mswindows)
+  (setq drive-letters '(nil))
+  (dolist (drive-letter drive-letters)
+    (dolist (name names)
+      (dolist (dir directories)
+	(dolist (type types)
+	  (let ((path (make-pathname 
+		       #+lispworks :host
+		       #+lispworks (when drive-letter drive-letter)
+		       #-lispworks :device
+		       #-lispworks (when drive-letter drive-letter)
+		       :name name 
+		       :type type
+		       :directory 
+		       (etypecase dir
+			 (pathname
+			  (pathname-directory dir))
+			 (list
+			  dir)
+			 (string
+			  (pathname-directory 
+			   (parse-namestring dir)))))))
+	    (when (probe-file path)
+	      (return-from find-foreign-library path)))))))
+   nil)
+
+
+(defun load-foreign-library (filename &key module supporting-libraries
+					   force-load)
   #+allegro (declare (ignore module supporting-libraries))
   #+lispworks  (declare (ignore supporting-libraries))
   #+cmu (declare (ignore module))
@@ -31,7 +79,8 @@
     (if (pathnamep filename)    ;; ensure filename is a string to check if
 	(setq filename (namestring filename)))  ; already loaded
 
-    (if (find filename *loaded-libraries* :test #'string-equal)
+    (if (and (not force-load)
+	     (find filename *loaded-libraries* :test #'string-equal))
 	t ;; return T, but don't reload library
       (progn
 	#+cmu (alien:load-foreign filename