r2927: Integrate Reini Urban's cormanlisp patches into main UFFI source

[uffi.git] / src / corman / getenv-ccl.lisp

diff --git a/src/corman/getenv-ccl.lisp b/src/corman/getenv-ccl.lisp
new file mode 100644 (file)
index 0000000..fa32861
--- /dev/null
+++ b/src/corman/getenv-ccl.lisp
@@ -0,0 +1,86 @@
+;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name:          getenv-ccl.cl
+;;;; Purpose:       cormanlisp version
+;;;; Programmer:    "Joe Marshall" <prunesquallor@attbi.com>
+;;;; Date Started:  Feb 2002
+;;;;
+`;;;; $Id: getenv-ccl.lisp,v 1.1 2002/10/01 17:05:29 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)
+
+(ct:defun-dll c-getenv ((lpname LPSTR)
+                       (lpbuffer LPSTR)
+                       (nsize LPDWORD))
+  :library-name "kernel32.dll"
+  :return-type DWORD
+  :entry-name "GetEnvironmentVariableA"
+  :linkage-type :pascal)
+
+(defun getenv (name)
+  (let ((nsizebuf (ct:malloc (sizeof :long)))
+        (buffer (ct:malloc 1))
+        (cname (ct:lisp-string-to-c-string name)))
+    (setf (ct:cref lpdword nsizebuf 0) 0)
+    (let* ((needed-size (c-getenv cname buffer nsizebuf))
+           (buffer1 (ct:malloc (1+ needed-size))))
+      (setf (ct:cref lpdword nsizebuf 0) needed-size)
+      (prog1 (if (zerop (c-getenv cname buffer1 nsizebuf)) 
+                 nil
+               (ct:c-string-to-lisp-string buffer1))
+        (ct:free buffer1)
+        (ct:free nsizebuf)))))
+
+(defun cl:user-homedir-pathname (&optional host)
+  (cond ((or (stringp host)
+             (and (consp host)
+                  (every #'stringp host))) nil)
+        ((or (eq host :unspecific)
+             (null host))
+         (let ((homedrive (getenv "HOMEDRIVE"))
+               (homepath  (getenv "HOMEPATH")))
+           (parse-namestring
+             (if (and (stringp homedrive)
+                      (stringp homepath)
+                      (= (length homedrive) 2)
+                      (> (length homepath) 0))
+                 (concatenate 'string homedrive homepath "\\")
+                 "C:\\"))))
+        (t (error "HOST must be a string, list of strings, NIL or :unspecific"))))
+
+;|
+(uffi:def-function ("getenv" c-getenv) 
+    ((name :cstring))
+  :returning :cstring)
+
+(defun my-getenv (key)
+  "Returns an environment variable, or NIL if it does not exist"
+  (check-type key string)
+  (uffi:with-cstring (key-native key)
+    (uffi:convert-from-cstring (c-getenv key-native))))
+    
+#examples-uffi
+(progn
+  (flet ((print-results (str)
+          (format t "~&(getenv ~S) => ~S" str (my-getenv str))))
+    (print-results "USER")
+    (print-results "_FOO_")))
+
+
+#test-uffi
+(progn
+  (util.test:test (my-getenv "_FOO_") nil :fail-info "Error retrieving non-existent getenv")
+  (util.test:test (and (stringp (my-getenv "USER"))
+                      (< 0 (length (my-getenv "USER"))))
+                 t :fail-info "Error retrieving getenv")
+)
+