utils.lisp - clic - Clic is an command line interactive client for gopher writt… | |
git clone git://bitreich.org/clic/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65… | |
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utils.lisp (3914B) | |
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1 ;;;; -*- Mode: lisp; indent-tabs-mode: nil -*- | |
2 ;;; | |
3 ;;; utils.lisp --- Various utilities. | |
4 ;;; | |
5 ;;; Copyright (C) 2005-2008, Luis Oliveira <loliveira(@)common-lisp.net> | |
6 ;;; | |
7 ;;; Permission is hereby granted, free of charge, to any person | |
8 ;;; obtaining a copy of this software and associated documentation | |
9 ;;; files (the "Software"), to deal in the Software without | |
10 ;;; restriction, including without limitation the rights to use, copy, | |
11 ;;; modify, merge, publish, distribute, sublicense, and/or sell copies | |
12 ;;; of the Software, and to permit persons to whom the Software is | |
13 ;;; furnished to do so, subject to the following conditions: | |
14 ;;; | |
15 ;;; The above copyright notice and this permission notice shall be | |
16 ;;; included in all copies or substantial portions of the Software. | |
17 ;;; | |
18 ;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
19 ;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
20 ;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
21 ;;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
22 ;;; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
23 ;;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
24 ;;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
25 ;;; DEALINGS IN THE SOFTWARE. | |
26 ;;; | |
27 | |
28 (in-package #:cffi) | |
29 | |
30 (defmacro discard-docstring (body-var &optional force) | |
31 "Discards the first element of the list in body-var if it's a | |
32 string and the only element (or if FORCE is T)." | |
33 `(when (and (stringp (car ,body-var)) (or ,force (cdr ,body-var))) | |
34 (pop ,body-var))) | |
35 | |
36 (defun single-bit-p (integer) | |
37 "Answer whether INTEGER, which must be an integer, is a single | |
38 set twos-complement bit." | |
39 (if (<= integer 0) | |
40 nil ; infinite set bits for negatives | |
41 (loop until (logbitp 0 integer) | |
42 do (setf integer (ash integer -1)) | |
43 finally (return (zerop (ash integer -1)))))) | |
44 | |
45 ;;; This function is here because it needs to be defined early. It's | |
46 ;;; used by DEFINE-PARSE-METHOD and DEFCTYPE to warn users when | |
47 ;;; they're defining types whose names belongs to the KEYWORD or CL | |
48 ;;; packages. CFFI itself gets to use keywords without a warning. | |
49 (defun warn-if-kw-or-belongs-to-cl (name) | |
50 (let ((package (symbol-package name))) | |
51 (when (and (not (eq *package* (find-package '#:cffi))) | |
52 (member package '(#:common-lisp #:keyword) | |
53 :key #'find-package)) | |
54 (warn "Defining a foreign type named ~S. This symbol belongs to t… | |
55 package and that may interfere with other code using CFFI." | |
56 name (package-name package))))) | |
57 | |
58 (define-condition obsolete-argument-warning (style-warning) | |
59 ((old-arg :initarg :old-arg :reader old-arg) | |
60 (new-arg :initarg :new-arg :reader new-arg)) | |
61 (:report (lambda (c s) | |
62 (format s "Keyword ~S is obsolete, please use ~S" | |
63 (old-arg c) (new-arg c))))) | |
64 | |
65 (defun warn-obsolete-argument (old-arg new-arg) | |
66 (warn 'obsolete-argument-warning | |
67 :old-arg old-arg :new-arg new-arg)) | |
68 | |
69 (defun split-if (test seq &optional (dir :before)) | |
70 (remove-if #'(lambda (x) (equal x (subseq seq 0 0))) | |
71 (loop for start fixnum = 0 | |
72 then (if (eq dir :before) | |
73 stop | |
74 (the fixnum (1+ (the fixnum stop)))) | |
75 while (< start (length seq)) | |
76 for stop = (position-if test seq | |
77 :start (if (eq dir :elide) | |
78 start | |
79 (the fixnum (1+ st… | |
80 collect (subseq seq start | |
81 (if (and stop (eq dir :after)) | |
82 (the fixnum (1+ (the fixnum stop)… | |
83 stop)) | |
84 while stop))) |