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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="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></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/codemirror">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 &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>