(in-package #:com.liotev.nntp.utils)
 
 (defun str (&rest parts)
   (with-output-to-string (out)
     (dolist (part parts)
       (when (not (null part))
         (write part :stream out :escape nil)))))
 
 (defun slurp-stream-as-seq (stream &key (element-type 'base-char))
   (let ((seq (make-array (file-length stream) :element-type element-type :fill-pointer t)))
     (setf (fill-pointer seq) (read-sequence seq stream))
     seq))
 
 (defun slurp-stream-in-chunks (stream &key (element-type 'character) (chunk-length 1024))
   (with-output-to-string (out)
     (let ((seq (make-array chunk-length :element-type element-type
                            :adjustable t
                            :fill-pointer chunk-length)))
       (loop
          (setf (fill-pointer seq) (read-sequence seq stream))
          (when (zerop (fill-pointer seq))
            (return))
          (write-sequence seq out)))))
 
 (defun slurp-stream (stream &key (element-type 'base-char))
   (if (null (file-length stream))
       (slurp-stream-in-chunks stream)
       (slurp-stream-as-seq stream :element-type element-type)))
 
 (defun slurp-file (file-name &key (element-type 'base-char))
   (with-open-file (s file-name :direction :input :element-type element-type)
     (slurp-stream-as-seq s :element-type element-type)))
 
 (defun getenv (name &optional default)
   #+CMU
   (let ((x (assoc name ext:*environment-list*
                   :test #'string=)))
     (if x (cdr x) default))
   #-CMU
   (or
    #+Allegro (sys:getenv name)
    #+CLISP (ext:getenv name)
    #+ECL (si:getenv name)
    #+SBCL (sb-unix::posix-getenv name)

    #+LISPWORKS (lispworks:environment-variable name)

    #+CCL (getenv name)
    default))