-;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-\r
-;;;; *************************************************************************\r
-;;;; FILE IDENTIFICATION\r
-;;;;\r
-;;;; Name: compress.cl\r
-;;;; Purpose: UFFI Example file for zlib compression\r
-;;;; Programmer: Kevin M. Rosenberg\r
-;;;; Date Started: Feb 2002\r
-;;;;\r
-;;;; $Id: compress.lisp,v 1.4 2003/03/10 17:37:05 kevin Exp $\r
-;;;;\r
-;;;; This file, part of UFFI, is Copyright (c) 2002 by Kevin M. Rosenberg\r
-;;;;\r
-;;;; UFFI users are granted the rights to distribute and use this software\r
-;;;; as governed by the terms of the Lisp Lesser GNU Public License\r
-;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.\r
-;;;; *************************************************************************\r
-\r
-(in-package :cl-user)\r
-\r
-(eval-when (:load-toplevel :execute)\r
- (unless (uffi:load-foreign-library\r
- #-(or macosx darwin)\r
- (uffi:find-foreign-library\r
- "libz"\r
- '("/usr/local/lib/" "/usr/lib/" "/zlib/")\r
- :types '("so" "a"))\r
- #+(or macosx darwin)\r
- (uffi:find-foreign-library "z"\r
- `(,(pathname-directory *load-pathname*)))\r
- :module "zlib" \r
- :supporting-libraries '("c"))\r
- (warn "Unable to load zlib")))\r
- \r
-(uffi:def-function ("compress" c-compress)\r
- ((dest (* :unsigned-char))\r
- (destlen (* :long))\r
- (source :cstring)\r
- (source-len :long))\r
- :returning :int\r
- :module "zlib")\r
- \r
-(defun compress (source)\r
- "Returns two values: array of bytes containing the compressed data\r
- and the numbe of compressed bytes"\r
- (let* ((sourcelen (length source))\r
- (destsize (+ 12 (ceiling (* sourcelen 1.01))))\r
- (dest (uffi:allocate-foreign-string destsize :unsigned t))\r
- (destlen (uffi:allocate-foreign-object :long)))\r
- (setf (uffi:deref-pointer destlen :long) destsize)\r
- (uffi:with-cstring (source-native source)\r
- (let ((result (c-compress dest destlen source-native sourcelen))\r
- (newdestlen (uffi:deref-pointer destlen :long)))\r
- (unwind-protect\r
- (if (zerop result)\r
- (values (uffi:convert-from-foreign-string \r
- dest\r
- :length newdestlen\r
- :null-terminated-p nil)\r
- newdestlen)\r
- (error "zlib error, code ~D" result))\r
- (progn\r
- (uffi:free-foreign-object destlen)\r
- (uffi:free-foreign-object dest)))))))\r
-\r
-(uffi:def-function ("uncompress" c-uncompress)\r
- ((dest (* :unsigned-char))\r
- (destlen (* :long))\r
- (source :cstring)\r
- (source-len :long))\r
- :returning :int\r
- :module "zlib")\r
-\r
-(defun uncompress (source)\r
- (let* ((sourcelen (length source))\r
- (destsize 200000) ;adjust as needed\r
- (dest (uffi:allocate-foreign-string destsize :unsigned t))\r
- (destlen (uffi:allocate-foreign-object :long)))\r
- (setf (uffi:deref-pointer destlen :long) destsize)\r
- (uffi:with-cstring (source-native source)\r
- (let ((result (c-uncompress dest destlen source-native sourcelen))\r
- (newdestlen (uffi:deref-pointer destlen :long)))\r
- (unwind-protect\r
- (if (zerop result)\r
- (uffi:convert-from-foreign-string \r
- dest\r
- :length newdestlen\r
- :null-terminated-p nil)\r
- (error "zlib error, code ~D" result))\r
- (progn\r
- (uffi:free-foreign-object destlen)\r
- (uffi:free-foreign-object dest)))))))\r
-\r
-#+examples-uffi\r
-(progn\r
- (flet ((print-results (str)\r
- (multiple-value-bind (compressed len) (compress str)\r
- (let ((*print-length* nil))\r
- (format t "~&(compress ~S) => " str)\r
- (format t "~S~%" (map 'list #'char-code compressed))))))\r
- (print-results "")\r
- (print-results "test")\r
- (print-results "test2")))\r
-\r
-#+test-uffi\r
-(progn\r
- (flet ((test-compress (str)\r
- (multiple-value-bind (compressed len) (compress str)\r
- (multiple-value-bind (uncompressed len2) (uncompress compressed)\r
- (util.test:test str uncompressed :test #'string=\r
- :fail-info "Error uncompressing a compressed string")))))\r
- (test-compress "")\r
- (test-compress "test")\r
- (test-compress "test2")))\r
-\r
-;; Results of the above on my system:\r
-;; (compress "") => 789c300001,8\r
-;; (compress "test") => 789c2b492d2e1045d1c1,12\r
-;; (compress "test2") => 789c2b492d2e31206501f3,13\r
+;;;; -*- Mode: Lisp; Syntax: ANSI-Common-Lisp; Base: 10 -*-
+;;;; *************************************************************************
+;;;; FILE IDENTIFICATION
+;;;;
+;;;; Name: compress.cl
+;;;; Purpose: UFFI Example file for zlib compression
+;;;; Programmer: Kevin M. Rosenberg
+;;;; Date Started: Feb 2002
+;;;;
+;;;; This file, part of UFFI, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
+;;;;
+;;;; *************************************************************************
+
+(in-package :cl-user)
+
+(eval-when (:load-toplevel :execute)
+ (unless (uffi:load-foreign-library
+ #-(or macosx darwin)
+ (uffi:find-foreign-library
+ "libz"
+ '("/usr/local/lib/" "/usr/lib/" "/zlib/")
+ :types '("so" "a"))
+ #+(or macosx darwin)
+ (uffi:find-foreign-library "z"
+ `(,(pathname-directory *load-pathname*)))
+ :module "zlib"
+ :supporting-libraries '("c"))
+ (warn "Unable to load zlib")))
+
+(uffi:def-function ("compress" c-compress)
+ ((dest (* :unsigned-char))
+ (destlen (* :long))
+ (source :cstring)
+ (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)))
+ (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-string
+ dest
+ :length newdestlen
+ :null-terminated-p nil)
+ 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))
+ (destlen (* :long))
+ (source :cstring)
+ (source-len :long))
+ :returning :int
+ :module "zlib")
+
+(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)))
+ (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)))))))
+
+#+examples-uffi
+(progn
+ (flet ((print-results (str)
+ (multiple-value-bind (compressed len) (compress str)
+ (let ((*print-length* nil))
+ (format t "~&(compress ~S) => " str)
+ (format t "~S~%" (map 'list #'char-code compressed))))))
+ (print-results "")
+ (print-results "test")
+ (print-results "test2")))
+
+#+test-uffi
+(progn
+ (flet ((test-compress (str)
+ (multiple-value-bind (compressed len) (compress str)
+ (multiple-value-bind (uncompressed len2) (uncompress compressed)
+ (util.test:test str uncompressed :test #'string=
+ :fail-info "Error uncompressing a compressed string")))))
+ (test-compress "")
+ (test-compress "test")
+ (test-compress "test2")))
+
+;; Results of the above on my system:
+;; (compress "") => 789c300001,8
+;; (compress "test") => 789c2b492d2e1045d1c1,12
+;; (compress "test2") => 789c2b492d2e31206501f3,13
projects / uffi.git / blobdiff