;;;; Author: Kevin M. Rosenberg
;;;; Date Started: Feb 2002
;;;;
-;;;; $Id$
-;;;;
-;;;; This file, part of UFFI, is Copyright (c) 2002-2003 by Kevin M. Rosenberg
+;;;; This file, part of UFFI, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
;;;;
;;;; *************************************************************************
(source-len :long))
:returning :int
:module "zlib")
-
+
(defun compress (source)
"Returns two values: array of bytes containing the compressed data
and the numbe of compressed bytes"
(let* ((sourcelen (length source))
- (destsize (+ 12 (ceiling (* sourcelen 1.01))))
- (dest (uffi:allocate-foreign-string destsize :unsigned t))
- (destlen (uffi:allocate-foreign-object :long)))
+ (destsize (+ 12 (ceiling (* sourcelen 1.01))))
+ (dest (uffi:allocate-foreign-string destsize :unsigned t))
+ (destlen (uffi:allocate-foreign-object :long)))
(setf (uffi:deref-pointer destlen :long) destsize)
(uffi:with-cstring (source-native source)
(let ((result (c-compress dest destlen source-native sourcelen))
- (newdestlen (uffi:deref-pointer destlen :long)))
- (unwind-protect
- (if (zerop result)
- (values (uffi:convert-from-foreign-usb8
- dest newdestlen)
- newdestlen)
- (error "zlib error, code ~D" result))
- (progn
- (uffi:free-foreign-object destlen)
- (uffi:free-foreign-object dest)))))))
+ (newdestlen (uffi:deref-pointer destlen :long)))
+ (unwind-protect
+ (if (zerop result)
+ (values (uffi:convert-from-foreign-usb8
+ dest newdestlen)
+ newdestlen)
+ (error "zlib error, code ~D" result))
+ (progn
+ (uffi:free-foreign-object destlen)
+ (uffi:free-foreign-object dest)))))))
(uffi:def-function ("uncompress" c-uncompress)
((dest (* :unsigned-char))
(defun uncompress (source)
(let* ((sourcelen (length source))
- (destsize 200000) ;adjust as needed
- (dest (uffi:allocate-foreign-string destsize :unsigned t))
- (destlen (uffi:allocate-foreign-object :long)))
+ (destsize 200000) ;adjust as needed
+ (dest (uffi:allocate-foreign-string destsize :unsigned t))
+ (destlen (uffi:allocate-foreign-object :long)))
(setf (uffi:deref-pointer destlen :long) destsize)
(uffi:with-cstring (source-native source)
(let ((result (c-uncompress dest destlen source-native sourcelen))
- (newdestlen (uffi:deref-pointer destlen :long)))
- (unwind-protect
- (if (zerop result)
- (uffi:convert-from-foreign-string
- dest
- :length newdestlen
- :null-terminated-p nil)
- (error "zlib error, code ~D" result))
- (progn
- (uffi:free-foreign-object destlen)
- (uffi:free-foreign-object dest)))))))
+ (newdestlen (uffi:deref-pointer destlen :long)))
+ (unwind-protect
+ (if (zerop result)
+ (uffi:convert-from-foreign-string
+ dest
+ :length newdestlen
+ :null-terminated-p nil)
+ (error "zlib error, code ~D" result))
+ (progn
+ (uffi:free-foreign-object destlen)
+ (uffi:free-foreign-object dest)))))))
(deftest :compress.1 (compress "")
#(120 156 3 0 0 0 0 1) 8)