Mercurial

comparison .cms/lib/codemirror/mode/commonlisp/index.html @ 0:78edf6b517a0 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:78edf6b517a0
1 <!doctype html>
2
3 <title>CodeMirror: Common Lisp mode</title>
4 <meta charset="utf-8"/>
5 <link rel=stylesheet href="../../doc/docs.css">
6
7 <link rel="stylesheet" href="../../lib/codemirror.css">
8 <script src="../../lib/codemirror.js"></script>
9 <script src="commonlisp.js"></script>
10 <style>.CodeMirror {background: #f8f8f8;}</style>
11 <div id=nav>
12 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
13
14 <ul>
15 <li><a href="../../index.html">Home</a>
16 <li><a href="../../doc/manual.html">Manual</a>
17 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
18 </ul>
19 <ul>
20 <li><a href="../index.html">Language modes</a>
21 <li><a class=active href="#">Common Lisp</a>
22 </ul>
23 </div>
24
25 <article>
26 <h2>Common Lisp mode</h2>
27 <form><textarea id="code" name="code">(in-package :cl-postgres)
28
29 ;; These are used to synthesize reader and writer names for integer
30 ;; reading/writing functions when the amount of bytes and the
31 ;; signedness is known. Both the macro that creates the functions and
32 ;; some macros that use them create names this way.
33 (eval-when (:compile-toplevel :load-toplevel :execute)
34 (defun integer-reader-name (bytes signed)
35 (intern (with-standard-io-syntax
36 (format nil "~a~a~a~a" '#:read- (if signed "" '#:u) '#:int bytes))))
37 (defun integer-writer-name (bytes signed)
38 (intern (with-standard-io-syntax
39 (format nil "~a~a~a~a" '#:write- (if signed "" '#:u) '#:int bytes)))))
40
41 (defmacro integer-reader (bytes)
42 "Create a function to read integers from a binary stream."
43 (let ((bits (* bytes 8)))
44 (labels ((return-form (signed)
45 (if signed
46 `(if (logbitp ,(1- bits) result)
47 (dpb result (byte ,(1- bits) 0) -1)
48 result)
49 `result))
50 (generate-reader (signed)
51 `(defun ,(integer-reader-name bytes signed) (socket)
52 (declare (type stream socket)
53 #.*optimize*)
54 ,(if (= bytes 1)
55 `(let ((result (the (unsigned-byte 8) (read-byte socket))))
56 (declare (type (unsigned-byte 8) result))
57 ,(return-form signed))
58 `(let ((result 0))
59 (declare (type (unsigned-byte ,bits) result))
60 ,@(loop :for byte :from (1- bytes) :downto 0
61 :collect `(setf (ldb (byte 8 ,(* 8 byte)) result)
62 (the (unsigned-byte 8) (read-byte socket))))
63 ,(return-form signed))))))
64 `(progn
65 ;; This causes weird errors on SBCL in some circumstances. Disabled for now.
66 ;; (declaim (inline ,(integer-reader-name bytes t)
67 ;; ,(integer-reader-name bytes nil)))
68 (declaim (ftype (function (t) (signed-byte ,bits))
69 ,(integer-reader-name bytes t)))
70 ,(generate-reader t)
71 (declaim (ftype (function (t) (unsigned-byte ,bits))
72 ,(integer-reader-name bytes nil)))
73 ,(generate-reader nil)))))
74
75 (defmacro integer-writer (bytes)
76 "Create a function to write integers to a binary stream."
77 (let ((bits (* 8 bytes)))
78 `(progn
79 (declaim (inline ,(integer-writer-name bytes t)
80 ,(integer-writer-name bytes nil)))
81 (defun ,(integer-writer-name bytes nil) (socket value)
82 (declare (type stream socket)
83 (type (unsigned-byte ,bits) value)
84 #.*optimize*)
85 ,@(if (= bytes 1)
86 `((write-byte value socket))
87 (loop :for byte :from (1- bytes) :downto 0
88 :collect `(write-byte (ldb (byte 8 ,(* byte 8)) value)
89 socket)))
90 (values))
91 (defun ,(integer-writer-name bytes t) (socket value)
92 (declare (type stream socket)
93 (type (signed-byte ,bits) value)
94 #.*optimize*)
95 ,@(if (= bytes 1)
96 `((write-byte (ldb (byte 8 0) value) socket))
97 (loop :for byte :from (1- bytes) :downto 0
98 :collect `(write-byte (ldb (byte 8 ,(* byte 8)) value)
99 socket)))
100 (values)))))
101
102 ;; All the instances of the above that we need.
103
104 (integer-reader 1)
105 (integer-reader 2)
106 (integer-reader 4)
107 (integer-reader 8)
108
109 (integer-writer 1)
110 (integer-writer 2)
111 (integer-writer 4)
112
113 (defun write-bytes (socket bytes)
114 "Write a byte-array to a stream."
115 (declare (type stream socket)
116 (type (simple-array (unsigned-byte 8)) bytes)
117 #.*optimize*)
118 (write-sequence bytes socket))
119
120 (defun write-str (socket string)
121 "Write a null-terminated string to a stream \(encoding it when UTF-8
122 support is enabled.)."
123 (declare (type stream socket)
124 (type string string)
125 #.*optimize*)
126 (enc-write-string string socket)
127 (write-uint1 socket 0))
128
129 (declaim (ftype (function (t unsigned-byte)
130 (simple-array (unsigned-byte 8) (*)))
131 read-bytes))
132 (defun read-bytes (socket length)
133 "Read a byte array of the given length from a stream."
134 (declare (type stream socket)
135 (type fixnum length)
136 #.*optimize*)
137 (let ((result (make-array length :element-type '(unsigned-byte 8))))
138 (read-sequence result socket)
139 result))
140
141 (declaim (ftype (function (t) string) read-str))
142 (defun read-str (socket)
143 "Read a null-terminated string from a stream. Takes care of encoding
144 when UTF-8 support is enabled."
145 (declare (type stream socket)
146 #.*optimize*)
147 (enc-read-string socket :null-terminated t))
148
149 (defun skip-bytes (socket length)
150 "Skip a given number of bytes in a binary stream."
151 (declare (type stream socket)
152 (type (unsigned-byte 32) length)
153 #.*optimize*)
154 (dotimes (i length)
155 (read-byte socket)))
156
157 (defun skip-str (socket)
158 "Skip a null-terminated string."
159 (declare (type stream socket)
160 #.*optimize*)
161 (loop :for char :of-type fixnum = (read-byte socket)
162 :until (zerop char)))
163
164 (defun ensure-socket-is-closed (socket &amp;key abort)
165 (when (open-stream-p socket)
166 (handler-case
167 (close socket :abort abort)
168 (error (error)
169 (warn "Ignoring the error which happened while trying to close PostgreSQL socket: ~A" error)))))
170 </textarea></form>
171 <script>
172 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {lineNumbers: true});
173 </script>
174
175 <p><strong>MIME types defined:</strong> <code>text/x-common-lisp</code>.</p>
176
177 </article>