r11657: 25 Apr 2007 Kevin Rosenberg <kevin@rosenberg.net>

[clsql.git] / uffi / clsql-uffi-loader.lisp

diff --git a/uffi/clsql-uffi-loader.lisp b/uffi/clsql-uffi-loader.lisp
index 8b9efb7207601f7c490d0898d73e7dba28125945..2705f554ee88a746ec35b3855feb578e3aa8bd63 100644 (file)
--- a/uffi/clsql-uffi-loader.lisp
+++ b/uffi/clsql-uffi-loader.lisp
@@ -18,12 +18,35 @@
 
 (in-package #:clsql-uffi)
 
-(defvar *clsql-uffi-library-filename* 
-  (uffi:find-foreign-library
-   '(#+(or 64bit x86-64) "uffi64" "uffi")
-   `(,clsql-uffi-system::*library-file-dir*
-     "/usr/lib/clsql/")
-   :drive-letters '("C")))
+(defun find-and-load-foreign-library (filenames &key module supporting-libraries (errorp t))
+  "Attempt to load a foreign library. This will search for any of the filenames, as
+well as any of the filenames in any of the clsql:*foreign-library-search-paths*"
+  (setq filenames (if (listp filenames) filenames (list filenames)))
+
+  (flet ((try-load (testpath)
+          (handler-case
+              (uffi:load-foreign-library testpath
+                                         :module module
+                                         :supporting-libraries supporting-libraries)
+            (error nil)))) ;(c) (warn "~A" c) nil))))
+    (or
+     (loop for type in (uffi:foreign-library-types)
+          thereis
+          (loop for name in filenames
+                for pn = (make-pathname :name name :type type)
+                thereis (or
+                          (try-load pn)
+                         (loop for search-path in clsql:*foreign-library-search-paths*
+                               thereis (try-load (merge-pathnames pn search-path))))))
+     (when errorp
+       (error "Couldn't load foreign librar~@P ~{~S~^, ~}. (searched ~S)"
+             (length filenames) filenames
+             'clsql:*foreign-library-search-paths*)))))
+
+;; searches clsql_uffi64 to accomodate both 32-bit and 64-bit libraries on same system
+(defvar *clsql-uffi-library-filenames*
+  `(,@(when (> most-positive-fixnum (expt 2 32)) (list "clsql_uffi64"))
+    "clsql_uffi"))
 
 (defvar *clsql-uffi-supporting-libraries* '("c")
   "Used only by CMU. List of library flags needed to be passed to ld to
@@ -34,15 +57,11 @@ set to the right path before compiling or loading the system.")
   "T if foreign library was able to be loaded successfully")
 
 (defun load-uffi-foreign-library ()
-  (unless (probe-file *clsql-uffi-library-filename*)
-    (error "Unable to find uffi.so"))
-  
-  (if (uffi:load-foreign-library *clsql-uffi-library-filename* 
-                                :module "clsql-uffi" 
-                                :supporting-libraries 
-                                *clsql-uffi-supporting-libraries*)
-      (setq *uffi-library-loaded* t)
-    (error "Unable to load helper library ~A" *clsql-uffi-library-filename*)))
+  (clsql:push-library-path clsql-uffi-system::*clsql-uffi-library-dir*)
+  (find-and-load-foreign-library *clsql-uffi-library-filenames*
+                                 :module "clsql-uffi"
+                                 :supporting-libraries
+                                 *clsql-uffi-supporting-libraries*)
+  (setq *uffi-library-loaded* t))
 
 (load-uffi-foreign-library)
-