Mercurial > hg > xemacs-beta
annotate lisp/cl-extra.el @ 5456:fe82be65969e
Added copyright and license to modules/common/configure-*
| author | Mats Lidell <matsl@xemacs.org> |
|---|---|
| date | Fri, 14 Jan 2011 23:31:29 +0100 |
| parents | 6506fcb40fcf |
| children | a9094f28f9a9 |
| rev | line source |
|---|---|
| 613 | 1 ;;; cl-extra.el --- Common Lisp extensions for XEmacs Lisp (part two) |
| 428 | 2 |
| 2153 | 3 ;; Copyright (C) 1993,2000,2003 Free Software Foundation, Inc. |
| 801 | 4 ;; Copyright (C) 2002 Ben Wing. |
| 428 | 5 |
| 6 ;; Author: Dave Gillespie <daveg@synaptics.com> | |
| 7 ;; Maintainer: XEmacs Development Team | |
| 8 ;; Version: 2.02 | |
| 9 ;; Keywords: extensions, dumped | |
| 10 | |
| 11 ;; This file is part of XEmacs. | |
| 12 | |
|
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13 ;; XEmacs is free software: you can redistribute it and/or modify it |
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14 ;; under the terms of the GNU General Public License as published by the |
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15 ;; Free Software Foundation, either version 3 of the License, or (at your |
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16 ;; option) any later version. |
| 428 | 17 |
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18 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT |
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19 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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20 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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21 ;; for more details. |
| 428 | 22 |
| 23 ;; You should have received a copy of the GNU General Public License | |
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24 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>. |
| 428 | 25 |
| 2153 | 26 ;;; Synched up with: FSF 21.3. |
| 428 | 27 |
| 28 ;;; Commentary: | |
| 29 | |
| 30 ;; This file is dumped with XEmacs. | |
| 31 | |
| 32 ;; These are extensions to Emacs Lisp that provide a degree of | |
| 33 ;; Common Lisp compatibility, beyond what is already built-in | |
| 34 ;; in Emacs Lisp. | |
| 35 ;; | |
| 36 ;; This package was written by Dave Gillespie; it is a complete | |
| 37 ;; rewrite of Cesar Quiroz's original cl.el package of December 1986. | |
| 38 ;; | |
| 39 ;; Bug reports, comments, and suggestions are welcome! | |
| 40 | |
| 41 ;; This file contains portions of the Common Lisp extensions | |
| 42 ;; package which are autoloaded since they are relatively obscure. | |
| 43 | |
| 44 ;; See cl.el for Change Log. | |
| 45 | |
| 46 | |
| 47 ;;; Code: | |
| 2153 | 48 ;; XEmacs addition |
| 428 | 49 (eval-when-compile |
| 50 (require 'obsolete)) | |
| 51 | |
| 52 ;;; Type coercion. | |
| 53 | |
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54 (defun coerce (object type) |
| 428 | 55 "Coerce OBJECT to type TYPE. |
| 56 TYPE is a Common Lisp type specifier." | |
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57 (cond ((eq type 'list) (if (listp object) object (append object nil))) |
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58 ((eq type 'vector) (if (vectorp object) object (vconcat object))) |
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59 ((eq type 'string) (if (stringp object) object (concat object))) |
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60 ((eq type 'array) (if (arrayp object) object (vconcat object))) |
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61 ((and (eq type 'character) (stringp object) |
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62 (eql (length object) 1)) (aref object 0)) |
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63 ((and (eq type 'character) (symbolp object)) |
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64 (coerce (symbol-name object) type)) |
| 2153 | 65 ;; XEmacs addition character <-> integer coercions |
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66 ((and (eq type 'character) (char-int-p object)) (int-char object)) |
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67 ((and (memq type '(integer fixnum)) (characterp object)) |
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68 (char-int object)) |
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69 ((eq type 'float) (float object)) |
| 2153 | 70 ;; XEmacs addition: enhanced numeric type coercions |
| 2367 | 71 ((and-fboundp 'coerce-number |
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72 (memq type '(integer ratio bigfloat fixnum)) |
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73 (coerce-number object type))) |
| 2153 | 74 ;; XEmacs addition: bit-vector coercion |
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75 ((or (eq type 'bit-vector) |
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76 (eq type 'simple-bit-vector)) |
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77 (if (bit-vector-p object) |
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78 object |
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79 (apply 'bit-vector (append object nil)))) |
| 2153 | 80 ;; XEmacs addition: weak-list coercion |
| 428 | 81 ((eq type 'weak-list) |
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82 (if (weak-list-p object) object |
| 428 | 83 (let ((wl (make-weak-list))) |
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84 (set-weak-list-list wl (if (listp object) |
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85 object |
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86 (append object nil))) |
| 428 | 87 wl))) |
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88 ((and |
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89 (memq (car-safe type) '(vector simple-array)) |
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90 (loop |
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91 for (ignore elements length) = type |
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92 initially (declare (special ignore)) |
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93 return (if (or (memq length '(* nil)) (eql length (length object))) |
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94 (cond |
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95 ((memq elements '(t * nil)) |
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96 (coerce object 'vector)) |
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97 ((memq elements '(string-char character)) |
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98 (coerce object 'string)) |
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99 ((eq elements 'bit) |
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100 (coerce object 'bit-vector))) |
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101 (error |
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102 'wrong-type-argument |
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103 "Type specifier length must equal sequence length" |
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104 type))))) |
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105 ((eq (car-safe type) 'simple-vector) |
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106 (coerce object (list* 'vector t (cdr type)))) |
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107 ((memq (car-safe type) |
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108 '(string simple-string base-string simple-base-string)) |
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109 (coerce object (list* 'vector 'character (cdr type)))) |
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110 ((eq (car-safe type) 'bit-vector) |
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111 (coerce object (list* 'vector 'bit (cdr type)))) |
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112 ((typep object type) object) |
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113 (t (error 'invalid-operation |
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114 "Can't coerce object to type" object type)))) |
| 428 | 115 |
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116 ;; XEmacs; #'equalp is in C. |
| 428 | 117 |
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118 ;; XEmacs; #'map, #'mapc, #'mapl, #'maplist, #'mapcon, #'some and #'every |
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119 ;; are now in C, together with #'map-into, which was never in this file. |
| 428 | 120 |
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121 ;; The compiler macro for this in cl-macs.el means if #'complement is handed |
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122 ;; a constant expression, byte-compiled code will see a byte-compiled |
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123 ;; function. |
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124 (defun complement (function &optional documentation) |
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125 "Return a function which gives the logical inverse of what FUNCTION would." |
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126 `(lambda (&rest arguments) ,@(if documentation (list documentation)) |
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127 (not (apply ',function arguments)))) |
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128 |
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129 (defun notany (cl-predicate cl-seq &rest cl-rest) |
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130 "Return true if PREDICATE is false of every element of SEQUENCE. |
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131 |
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132 With optional SEQUENCES, call PREDICATE each time with as many arguments as |
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133 there are SEQUENCES (plus one for the element from SEQUENCE). |
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134 |
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135 arguments: (PREDICATE SEQUENCES &rest SEQUENCES)" |
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136 (not (apply 'some cl-predicate cl-seq cl-rest))) |
| 428 | 137 |
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138 (defun notevery (cl-predicate cl-seq &rest cl-rest) |
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139 "Return true if PREDICATE is false of some element of SEQUENCE. |
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140 |
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141 With optional SEQUENCES, call PREDICATE each time with as many arguments as |
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142 there are SEQUENCES (plus one for the element from SEQUENCE). |
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143 |
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144 arguments: (PREDICATE SEQUENCES &rest SEQUENCES)" |
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145 (not (apply 'every cl-predicate cl-seq cl-rest))) |
| 428 | 146 |
| 147 ;;; Support for `loop'. | |
| 2153 | 148 (defalias 'cl-map-keymap 'map-keymap) |
| 428 | 149 |
| 150 (defun cl-map-keymap-recursively (cl-func-rec cl-map &optional cl-base) | |
| 151 (or cl-base | |
| 2153 | 152 (setq cl-base (copy-sequence [0]))) |
| 153 (map-keymap | |
| 428 | 154 (function |
| 155 (lambda (cl-key cl-bind) | |
| 156 (aset cl-base (1- (length cl-base)) cl-key) | |
| 157 (if (keymapp cl-bind) | |
| 158 (cl-map-keymap-recursively | |
| 159 cl-func-rec cl-bind | |
| 2153 | 160 (vconcat cl-base (list 0))) |
| 428 | 161 (funcall cl-func-rec cl-base cl-bind)))) |
| 162 cl-map)) | |
| 163 | |
| 164 (defun cl-map-intervals (cl-func &optional cl-what cl-prop cl-start cl-end) | |
| 165 (or cl-what (setq cl-what (current-buffer))) | |
| 166 (if (bufferp cl-what) | |
| 167 (let (cl-mark cl-mark2 (cl-next t) cl-next2) | |
| 2153 | 168 (with-current-buffer cl-what |
| 428 | 169 (setq cl-mark (copy-marker (or cl-start (point-min)))) |
| 170 (setq cl-mark2 (and cl-end (copy-marker cl-end)))) | |
| 171 (while (and cl-next (or (not cl-mark2) (< cl-mark cl-mark2))) | |
| 2153 | 172 (setq cl-next (if cl-prop (next-single-property-change |
| 173 cl-mark cl-prop cl-what) | |
| 174 (next-property-change cl-mark cl-what)) | |
| 175 cl-next2 (or cl-next (with-current-buffer cl-what | |
| 176 (point-max)))) | |
| 428 | 177 (funcall cl-func (prog1 (marker-position cl-mark) |
| 178 (set-marker cl-mark cl-next2)) | |
| 179 (if cl-mark2 (min cl-next2 cl-mark2) cl-next2))) | |
| 180 (set-marker cl-mark nil) (if cl-mark2 (set-marker cl-mark2 nil))) | |
| 181 (or cl-start (setq cl-start 0)) | |
| 182 (or cl-end (setq cl-end (length cl-what))) | |
| 183 (while (< cl-start cl-end) | |
| 2153 | 184 (let ((cl-next (or (if cl-prop (next-single-property-change |
| 185 cl-start cl-prop cl-what) | |
| 186 (next-property-change cl-start cl-what)) | |
| 428 | 187 cl-end))) |
| 188 (funcall cl-func cl-start (min cl-next cl-end)) | |
| 189 (setq cl-start cl-next))))) | |
| 190 | |
| 191 (defun cl-map-overlays (cl-func &optional cl-buffer cl-start cl-end cl-arg) | |
| 192 (or cl-buffer (setq cl-buffer (current-buffer))) | |
| 502 | 193 (with-fboundp '(overlay-start overlay-end overlays-at next-overlay-change) |
| 194 (if-fboundp 'overlay-lists | |
| 428 | 195 |
| 502 | 196 ;; This is the preferred algorithm, though overlay-lists is |
| 197 ;; undocumented. | |
| 198 (let (cl-ovl) | |
| 2153 | 199 (with-current-buffer cl-buffer |
| 502 | 200 (setq cl-ovl (overlay-lists)) |
| 201 (if cl-start (setq cl-start (copy-marker cl-start))) | |
| 202 (if cl-end (setq cl-end (copy-marker cl-end)))) | |
| 203 (setq cl-ovl (nconc (car cl-ovl) (cdr cl-ovl))) | |
| 204 (while (and cl-ovl | |
| 205 (or (not (overlay-start (car cl-ovl))) | |
| 206 (and cl-end (>= (overlay-start (car cl-ovl)) cl-end)) | |
| 207 (and cl-start (<= (overlay-end (car cl-ovl)) | |
| 208 cl-start)) | |
| 209 (not (funcall cl-func (car cl-ovl) cl-arg)))) | |
| 210 (setq cl-ovl (cdr cl-ovl))) | |
| 211 (if cl-start (set-marker cl-start nil)) | |
| 212 (if cl-end (set-marker cl-end nil))) | |
| 213 | |
| 214 ;; This alternate algorithm fails to find zero-length overlays. | |
| 2153 | 215 (let ((cl-mark (with-current-buffer cl-buffer |
| 216 (copy-marker (or cl-start (point-min))))) | |
| 217 (cl-mark2 (and cl-end (with-current-buffer cl-buffer | |
| 218 (copy-marker cl-end)))) | |
| 502 | 219 cl-pos cl-ovl) |
| 220 (while (save-excursion | |
| 221 (and (setq cl-pos (marker-position cl-mark)) | |
| 222 (< cl-pos (or cl-mark2 (point-max))) | |
| 223 (progn | |
| 224 (set-buffer cl-buffer) | |
| 225 (setq cl-ovl (overlays-at cl-pos)) | |
| 226 (set-marker cl-mark (next-overlay-change cl-pos))))) | |
| 227 (while (and cl-ovl | |
| 228 (or (/= (overlay-start (car cl-ovl)) cl-pos) | |
| 229 (not (and (funcall cl-func (car cl-ovl) cl-arg) | |
| 230 (set-marker cl-mark nil))))) | |
| 231 (setq cl-ovl (cdr cl-ovl)))) | |
| 232 (set-marker cl-mark nil) (if cl-mark2 (set-marker cl-mark2 nil)))))) | |
| 428 | 233 |
| 234 ;;; Support for `setf'. | |
| 235 (defun cl-set-frame-visible-p (frame val) | |
| 236 (cond ((null val) (make-frame-invisible frame)) | |
| 237 ((eq val 'icon) (iconify-frame frame)) | |
| 238 (t (make-frame-visible frame))) | |
| 239 val) | |
| 240 | |
| 241 ;;; Support for `progv'. | |
| 242 (defvar cl-progv-save) | |
| 243 (defun cl-progv-before (syms values) | |
| 244 (while syms | |
| 2153 | 245 (push (if (boundp (car syms)) |
| 428 | 246 (cons (car syms) (symbol-value (car syms))) |
| 247 (car syms)) cl-progv-save) | |
| 248 (if values | |
| 2153 | 249 (set (pop syms) (pop values)) |
| 250 (makunbound (pop syms))))) | |
| 428 | 251 |
| 252 (defun cl-progv-after () | |
| 253 (while cl-progv-save | |
| 254 (if (consp (car cl-progv-save)) | |
| 255 (set (car (car cl-progv-save)) (cdr (car cl-progv-save))) | |
| 256 (makunbound (car cl-progv-save))) | |
| 2153 | 257 (pop cl-progv-save))) |
| 428 | 258 |
| 259 ;;; Numbers. | |
| 260 | |
| 261 (defun gcd (&rest args) | |
| 262 "Return the greatest common divisor of the arguments." | |
| 2153 | 263 (let ((a (abs (or (pop args) 0)))) |
| 428 | 264 (while args |
| 2153 | 265 (let ((b (abs (pop args)))) |
| 428 | 266 (while (> b 0) (setq b (% a (setq a b)))))) |
| 267 a)) | |
| 268 | |
| 269 (defun lcm (&rest args) | |
| 270 "Return the least common multiple of the arguments." | |
| 271 (if (memq 0 args) | |
| 272 0 | |
| 2153 | 273 (let ((a (abs (or (pop args) 1)))) |
| 428 | 274 (while args |
| 2153 | 275 (let ((b (abs (pop args)))) |
| 428 | 276 (setq a (* (/ a (gcd a b)) b)))) |
| 277 a))) | |
| 278 | |
| 279 (defun isqrt (a) | |
| 280 "Return the integer square root of the argument." | |
| 281 (if (and (integerp a) (> a 0)) | |
| 282 ;; XEmacs change | |
| 283 (let ((g (cond ((>= a 1000000) 10000) ((>= a 10000) 1000) | |
| 284 ((>= a 100) 100) (t 10))) | |
| 285 g2) | |
| 286 (while (< (setq g2 (/ (+ g (/ a g)) 2)) g) | |
| 287 (setq g g2)) | |
| 288 g) | |
| 289 (if (eq a 0) 0 (signal 'arith-error nil)))) | |
| 290 | |
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291 ;; We can't use macrolet in this file; whence the literal macro |
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292 ;; definition-and-call: |
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293 ((macro . (lambda (&rest symbols) |
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294 "Make some old CL package truncate and round functions available. |
| 428 | 295 |
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296 These functions are now implemented in C; their Lisp implementations in this |
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297 XEmacs are trivial, so we provide them and mark them obsolete." |
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298 (let (symbol result) |
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299 (while symbols |
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300 (setq symbol (car symbols) |
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301 symbols (cdr symbols)) |
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302 (push `(make-obsolete ',(intern (format "%s*" symbol)) |
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303 ',symbol "21.5.29") |
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304 result) |
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305 (push |
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306 `(defun ,(intern (format "%s*" symbol)) (number &optional divisor) |
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307 ,(format "See `%s'. This returns a list, not multiple values." |
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308 symbol) |
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309 (multiple-value-list (,symbol number divisor))) |
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310 result)) |
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311 (cons 'progn result)))) |
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312 ceiling floor round truncate) |
| 428 | 313 |
| 314 (defun mod* (x y) | |
| 315 "The remainder of X divided by Y, with the same sign as Y." | |
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316 (nth-value 1 (floor x y))) |
| 428 | 317 |
| 318 (defun rem* (x y) | |
| 319 "The remainder of X divided by Y, with the same sign as X." | |
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320 (nth-value 1 (truncate x y))) |
| 428 | 321 |
| 322 (defun signum (a) | |
| 323 "Return 1 if A is positive, -1 if negative, 0 if zero." | |
| 324 (cond ((> a 0) 1) ((< a 0) -1) (t 0))) | |
| 325 | |
| 326 ;; Random numbers. | |
| 327 | |
| 328 (defvar *random-state*) | |
| 329 (defun random* (lim &optional state) | |
| 330 "Return a random nonnegative number less than LIM, an integer or float. | |
| 331 Optional second arg STATE is a random-state object." | |
| 332 (or state (setq state *random-state*)) | |
| 333 ;; Inspired by "ran3" from Numerical Recipes. Additive congruential method. | |
| 334 (let ((vec (aref state 3))) | |
| 335 (if (integerp vec) | |
| 336 (let ((i 0) (j (- 1357335 (% (abs vec) 1357333))) (k 1)) | |
| 337 (aset state 3 (setq vec (make-vector 55 nil))) | |
| 338 (aset vec 0 j) | |
| 339 (while (> (setq i (% (+ i 21) 55)) 0) | |
| 340 (aset vec i (setq j (prog1 k (setq k (- j k)))))) | |
| 341 (while (< (setq i (1+ i)) 200) (random* 2 state)))) | |
| 342 (let* ((i (aset state 1 (% (1+ (aref state 1)) 55))) | |
| 343 (j (aset state 2 (% (1+ (aref state 2)) 55))) | |
| 344 (n (logand 8388607 (aset vec i (- (aref vec i) (aref vec j)))))) | |
| 345 (if (integerp lim) | |
| 346 (if (<= lim 512) (% n lim) | |
| 347 (if (> lim 8388607) (setq n (+ (lsh n 9) (random* 512 state)))) | |
| 348 (let ((mask 1023)) | |
| 349 (while (< mask (1- lim)) (setq mask (1+ (+ mask mask)))) | |
| 350 (if (< (setq n (logand n mask)) lim) n (random* lim state)))) | |
| 351 (* (/ n '8388608e0) lim))))) | |
| 352 | |
| 353 (defun make-random-state (&optional state) | |
| 354 "Return a copy of random-state STATE, or of `*random-state*' if omitted. | |
| 355 If STATE is t, return a new state object seeded from the time of day." | |
| 356 (cond ((null state) (make-random-state *random-state*)) | |
| 357 ((vectorp state) (cl-copy-tree state t)) | |
| 358 ((integerp state) (vector 'cl-random-state-tag -1 30 state)) | |
| 359 (t (make-random-state (cl-random-time))))) | |
| 360 | |
| 361 (defun random-state-p (object) | |
| 362 "Return t if OBJECT is a random-state object." | |
| 363 (and (vectorp object) (= (length object) 4) | |
| 364 (eq (aref object 0) 'cl-random-state-tag))) | |
| 365 | |
| 366 | |
| 367 ;; Implementation limits. | |
| 368 | |
| 369 (defun cl-finite-do (func a b) | |
| 370 (condition-case nil | |
| 371 (let ((res (funcall func a b))) ; check for IEEE infinity | |
| 372 (and (numberp res) (/= res (/ res 2)) res)) | |
| 373 (arith-error nil))) | |
| 374 | |
| 375 (defun cl-float-limits () | |
| 376 (or most-positive-float (not (numberp '2e1)) | |
| 377 (let ((x '2e0) y z) | |
| 378 ;; Find maximum exponent (first two loops are optimizations) | |
| 379 (while (cl-finite-do '* x x) (setq x (* x x))) | |
| 380 (while (cl-finite-do '* x (/ x 2)) (setq x (* x (/ x 2)))) | |
| 381 (while (cl-finite-do '+ x x) (setq x (+ x x))) | |
| 382 (setq z x y (/ x 2)) | |
| 383 ;; Now fill in 1's in the mantissa. | |
| 384 (while (and (cl-finite-do '+ x y) (/= (+ x y) x)) | |
| 385 (setq x (+ x y) y (/ y 2))) | |
| 386 (setq most-positive-float x | |
| 387 most-negative-float (- x)) | |
| 388 ;; Divide down until mantissa starts rounding. | |
| 389 (setq x (/ x z) y (/ 16 z) x (* x y)) | |
| 390 (while (condition-case nil (and (= x (* (/ x 2) 2)) (> (/ y 2) 0)) | |
| 391 (arith-error nil)) | |
| 392 (setq x (/ x 2) y (/ y 2))) | |
| 393 (setq least-positive-normalized-float y | |
| 394 least-negative-normalized-float (- y)) | |
| 395 ;; Divide down until value underflows to zero. | |
| 396 (setq x (/ 1 z) y x) | |
| 397 (while (condition-case nil (> (/ x 2) 0) (arith-error nil)) | |
| 398 (setq x (/ x 2))) | |
| 399 (setq least-positive-float x | |
| 400 least-negative-float (- x)) | |
| 401 (setq x '1e0) | |
| 402 (while (/= (+ '1e0 x) '1e0) (setq x (/ x 2))) | |
| 403 (setq float-epsilon (* x 2)) | |
| 404 (setq x '1e0) | |
| 405 (while (/= (- '1e0 x) '1e0) (setq x (/ x 2))) | |
| 406 (setq float-negative-epsilon (* x 2)))) | |
| 407 nil) | |
| 408 | |
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409 ;; XEmacs; call cl-float-limits at dump time. |
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410 (cl-float-limits) |
| 428 | 411 |
| 412 ;;; Sequence functions. | |
| 413 | |
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414 ;; XEmacs; #'subseq is in C. |
| 428 | 415 |
| 416 (defun concatenate (type &rest seqs) | |
| 417 "Concatenate, into a sequence of type TYPE, the argument SEQUENCES." | |
| 2153 | 418 ;; XEmacs change: use case instead of cond for clarity |
| 428 | 419 (case type |
| 420 (vector (apply 'vconcat seqs)) | |
| 421 (string (apply 'concat seqs)) | |
| 422 (list (apply 'append (append seqs '(nil)))) | |
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423 (bit-vector (apply 'bvconcat seqs)) |
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424 (t (error 'invalid-argument "Not a sequence type name" type)))) |
| 428 | 425 |
| 426 ;;; List functions. | |
| 427 | |
| 428 (defun revappend (x y) | |
| 429 "Equivalent to (append (reverse X) Y)." | |
| 430 (nconc (reverse x) y)) | |
| 431 | |
| 432 (defun nreconc (x y) | |
| 433 "Equivalent to (nconc (nreverse X) Y)." | |
| 434 (nconc (nreverse x) y)) | |
| 435 | |
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436 ;; XEmacs; check LIST for type and circularity. |
| 428 | 437 (defun tailp (sublist list) |
| 438 "Return true if SUBLIST is a tail of LIST." | |
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439 (check-argument-type #'listp list) |
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440 (let ((before list) (evenp t)) |
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441 (while (and (consp list) (not (eq sublist list))) |
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442 (setq list (cdr list) |
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443 evenp (not evenp)) |
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444 (if evenp (setq before (cdr before))) |
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445 (if (eq before list) (error 'circular-list list))) |
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446 (eql sublist list))) |
| 428 | 447 |
| 2153 | 448 (defalias 'cl-copy-tree 'copy-tree) |
| 428 | 449 |
| 450 ;;; Property lists. | |
| 451 | |
| 452 ;; XEmacs: our `get' groks DEFAULT. | |
| 453 (defalias 'get* 'get) | |
| 442 | 454 (defalias 'getf 'plist-get) |
| 428 | 455 |
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456 ;; XEmacs; these are built-in. |
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457 (defalias 'cl-set-getf 'plist-put) |
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458 (defalias 'cl-do-remf 'plist-remprop) |
| 2153 | 459 (defalias 'cl-remprop 'remprop) |
| 460 | |
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461 (defun get-properties (plist indicator-list) |
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462 "Find a property from INDICATOR-LIST in PLIST. |
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463 Return 3 values: |
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464 - the first property found, |
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465 - its value, |
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466 - the tail of PLIST beginning with the found entry." |
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467 (do ((plst plist (cddr plst))) |
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468 ((null plst) (values nil nil nil)) |
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469 (cond ((atom (cdr plst)) |
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470 (error "Malformed property list: %S." plist)) |
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471 ((memq (car plst) indicator-list) |
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472 (return (values (car plst) (cadr plst) plst)))))) |
| 2153 | 473 |
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474 ;; See also the compiler macro in cl-macs.el. |
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475 (defun constantly (value &rest more-values) |
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476 "Construct a function always returning VALUE, and possibly MORE-VALUES. |
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477 |
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478 The constructed function accepts any number of arguments, and ignores them. |
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479 |
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480 Members of MORE-VALUES, if provided, will be passed as multiple values; see |
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481 `multiple-value-bind' and `multiple-value-setq'." |
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482 (symbol-macrolet |
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483 ((arglist '(&rest ignore))) |
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484 (if (or more-values (eval-when-compile (not (cl-compiling-file)))) |
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485 `(lambda ,arglist (values-list ',(cons value more-values))) |
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486 (make-byte-code |
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487 arglist |
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488 (eval-when-compile |
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489 (let ((compiled (byte-compile-sexp #'(lambda (&rest ignore) |
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490 (declare (ignore ignore)) |
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491 'placeholder)))) |
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492 (assert (and |
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493 (equal [placeholder] |
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494 (compiled-function-constants compiled)) |
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495 (= 1 (compiled-function-stack-depth compiled))) |
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496 t |
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497 "Our assumptions about compiled code appear not to hold.") |
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498 (compiled-function-instructions compiled))) |
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499 (vector value) 1)))) |
| 2153 | 500 |
| 428 | 501 ;;; Hash tables. |
| 502 | |
| 503 ;; The `regular' Common Lisp hash-table stuff has been moved into C. | |
| 504 ;; Only backward compatibility stuff remains here. | |
| 505 (defun make-hashtable (size &optional test) | |
| 506 (make-hash-table :test test :size size)) | |
| 507 (defun make-weak-hashtable (size &optional test) | |
| 508 (make-hash-table :test test :size size :weakness t)) | |
| 509 (defun make-key-weak-hashtable (size &optional test) | |
| 510 (make-hash-table :test test :size size :weakness 'key)) | |
| 511 (defun make-value-weak-hashtable (size &optional test) | |
| 512 (make-hash-table :test test :size size :weakness 'value)) | |
| 513 | |
| 514 (define-obsolete-function-alias 'hashtablep 'hash-table-p) | |
| 515 (define-obsolete-function-alias 'hashtable-fullness 'hash-table-count) | |
| 516 (define-obsolete-function-alias 'hashtable-test-function 'hash-table-test) | |
| 517 (define-obsolete-function-alias 'hashtable-type 'hash-table-type) | |
| 518 (define-obsolete-function-alias 'hashtable-size 'hash-table-size) | |
| 519 (define-obsolete-function-alias 'copy-hashtable 'copy-hash-table) | |
| 520 | |
| 521 (make-obsolete 'make-hashtable 'make-hash-table) | |
| 522 (make-obsolete 'make-weak-hashtable 'make-hash-table) | |
| 523 (make-obsolete 'make-key-weak-hashtable 'make-hash-table) | |
| 524 (make-obsolete 'make-value-weak-hashtable 'make-hash-table) | |
| 525 (make-obsolete 'hash-table-type 'hash-table-weakness) | |
| 526 | |
| 527 (when (fboundp 'x-keysym-hash-table) | |
| 528 (make-obsolete 'x-keysym-hashtable 'x-keysym-hash-table)) | |
| 529 | |
| 530 ;; Compatibility stuff for old kludgy cl.el hash table implementation | |
| 531 (defvar cl-builtin-gethash (symbol-function 'gethash)) | |
| 532 (defvar cl-builtin-remhash (symbol-function 'remhash)) | |
| 533 (defvar cl-builtin-clrhash (symbol-function 'clrhash)) | |
| 534 (defvar cl-builtin-maphash (symbol-function 'maphash)) | |
| 535 | |
| 536 (defalias 'cl-gethash 'gethash) | |
| 537 (defalias 'cl-puthash 'puthash) | |
| 538 (defalias 'cl-remhash 'remhash) | |
| 539 (defalias 'cl-clrhash 'clrhash) | |
| 540 (defalias 'cl-maphash 'maphash) | |
| 2153 | 541 ;; These three actually didn't exist in Emacs-20. |
| 542 (defalias 'cl-make-hash-table 'make-hash-table) | |
| 543 (defalias 'cl-hash-table-p 'hash-table-p) | |
| 544 (defalias 'cl-hash-table-count 'hash-table-count) | |
| 428 | 545 |
| 546 ;;; Some debugging aids. | |
| 547 | |
| 548 (defun cl-prettyprint (form) | |
| 549 "Insert a pretty-printed rendition of a Lisp FORM in current buffer." | |
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550 (let ((pt (point)) last just) |
| 428 | 551 (insert "\n" (prin1-to-string form) "\n") |
| 552 (setq last (point)) | |
| 553 (goto-char (1+ pt)) | |
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554 (while (re-search-forward "(\\(?:\\(?:function\\|quote\\) \\)" last t) |
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555 (delete-region (match-beginning 0) (match-end 0)) |
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556 (if (= (length "(function ") (- (match-end 0) (match-beginning 0))) |
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557 (insert "#'") |
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558 (insert "'")) |
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559 (setq just (point)) |
| 428 | 560 (forward-sexp) |
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561 (delete-char 1) |
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562 (goto-char just)) |
| 428 | 563 (goto-char (1+ pt)) |
| 564 (cl-do-prettyprint))) | |
| 565 | |
| 566 (defun cl-do-prettyprint () | |
| 567 (skip-chars-forward " ") | |
| 568 (if (looking-at "(") | |
|
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569 (let ((skip (or (looking-at "((") |
| 2153 | 570 ;; XEmacs: be selective about trailing stuff after prog |
| 1729 | 571 (looking-at "(prog[nv12\\(ress-feedback\\|n-with-message\\)]") |
| 428 | 572 (looking-at "(unwind-protect ") |
| 573 (looking-at "(function (") | |
| 574 (looking-at "(cl-block-wrapper "))) | |
| 575 (two (or (looking-at "(defun ") (looking-at "(defmacro "))) | |
| 576 (let (or (looking-at "(let\\*? ") (looking-at "(while "))) | |
| 577 (set (looking-at "(p?set[qf] "))) | |
| 578 (if (or skip let | |
| 579 (progn | |
| 580 (forward-sexp) | |
| 581 (and (>= (current-column) 78) (progn (backward-sexp) t)))) | |
| 582 (let ((nl t)) | |
| 583 (forward-char 1) | |
| 584 (cl-do-prettyprint) | |
| 585 (or skip (looking-at ")") (cl-do-prettyprint)) | |
| 586 (or (not two) (looking-at ")") (cl-do-prettyprint)) | |
| 587 (while (not (looking-at ")")) | |
| 588 (if set (setq nl (not nl))) | |
| 589 (if nl (insert "\n")) | |
| 590 (lisp-indent-line) | |
| 591 (cl-do-prettyprint)) | |
| 592 (forward-char 1)))) | |
| 593 (forward-sexp))) | |
| 594 | |
| 595 (defvar cl-macroexpand-cmacs nil) | |
| 596 (defvar cl-closure-vars nil) | |
| 597 | |
| 598 (defun cl-macroexpand-all (form &optional env) | |
| 599 "Expand all macro calls through a Lisp FORM. | |
| 600 This also does some trivial optimizations to make the form prettier." | |
| 601 (while (or (not (eq form (setq form (macroexpand form env)))) | |
| 602 (and cl-macroexpand-cmacs | |
| 603 (not (eq form (setq form (compiler-macroexpand form))))))) | |
| 604 (cond ((not (consp form)) form) | |
| 605 ((memq (car form) '(let let*)) | |
| 606 (if (null (nth 1 form)) | |
| 607 (cl-macroexpand-all (cons 'progn (cddr form)) env) | |
| 608 (let ((letf nil) (res nil) (lets (cadr form))) | |
| 609 (while lets | |
| 2153 | 610 (push (if (consp (car lets)) |
| 428 | 611 (let ((exp (cl-macroexpand-all (caar lets) env))) |
| 612 (or (symbolp exp) (setq letf t)) | |
| 613 (cons exp (cl-macroexpand-body (cdar lets) env))) | |
| 614 (let ((exp (cl-macroexpand-all (car lets) env))) | |
| 615 (if (symbolp exp) exp | |
| 616 (setq letf t) (list exp nil)))) res) | |
| 617 (setq lets (cdr lets))) | |
| 618 (list* (if letf (if (eq (car form) 'let) 'letf 'letf*) (car form)) | |
| 619 (nreverse res) (cl-macroexpand-body (cddr form) env))))) | |
| 620 ((eq (car form) 'cond) | |
| 621 (cons (car form) | |
| 622 (mapcar (function (lambda (x) (cl-macroexpand-body x env))) | |
| 623 (cdr form)))) | |
| 624 ((eq (car form) 'condition-case) | |
| 625 (list* (car form) (nth 1 form) (cl-macroexpand-all (nth 2 form) env) | |
| 626 (mapcar (function | |
| 627 (lambda (x) | |
| 628 (cons (car x) (cl-macroexpand-body (cdr x) env)))) | |
| 629 (cdddr form)))) | |
| 630 ((memq (car form) '(quote function)) | |
| 631 (if (eq (car-safe (nth 1 form)) 'lambda) | |
| 632 (let ((body (cl-macroexpand-body (cddadr form) env))) | |
| 633 (if (and cl-closure-vars (eq (car form) 'function) | |
| 634 (cl-expr-contains-any body cl-closure-vars)) | |
| 635 (let* ((new (mapcar 'gensym cl-closure-vars)) | |
| 636 (sub (pairlis cl-closure-vars new)) (decls nil)) | |
| 637 (while (or (stringp (car body)) | |
| 638 (eq (car-safe (car body)) 'interactive)) | |
| 2153 | 639 (push (list 'quote (pop body)) decls)) |
| 428 | 640 (put (car (last cl-closure-vars)) 'used t) |
| 641 (append | |
| 642 (list 'list '(quote lambda) '(quote (&rest --cl-rest--))) | |
| 643 (sublis sub (nreverse decls)) | |
| 644 (list | |
| 645 (list* 'list '(quote apply) | |
| 2153 | 646 ;; XEmacs: put a quote before the function |
| 428 | 647 (list 'list '(quote quote) |
| 648 (list 'function | |
| 649 (list* 'lambda | |
| 650 (append new (cadadr form)) | |
| 651 (sublis sub body)))) | |
| 652 (nconc (mapcar (function | |
| 653 (lambda (x) | |
| 654 (list 'list '(quote quote) x))) | |
| 655 cl-closure-vars) | |
| 656 '((quote --cl-rest--))))))) | |
| 657 (list (car form) (list* 'lambda (cadadr form) body)))) | |
| 658 (let ((found (assq (cadr form) env))) | |
| 2153 | 659 ;; XEmacs: cadr/caddr operate on nil without errors |
| 428 | 660 (if (eq (cadr (caddr found)) 'cl-labels-args) |
| 661 (cl-macroexpand-all (cadr (caddr (cadddr found))) env) | |
| 662 form)))) | |
| 663 ((memq (car form) '(defun defmacro)) | |
| 664 (list* (car form) (nth 1 form) (cl-macroexpand-body (cddr form) env))) | |
| 665 ((and (eq (car form) 'progn) (not (cddr form))) | |
| 666 (cl-macroexpand-all (nth 1 form) env)) | |
| 667 ((eq (car form) 'setq) | |
| 668 (let* ((args (cl-macroexpand-body (cdr form) env)) (p args)) | |
| 669 (while (and p (symbolp (car p))) (setq p (cddr p))) | |
| 670 (if p (cl-macroexpand-all (cons 'setf args)) (cons 'setq args)))) | |
| 671 (t (cons (car form) (cl-macroexpand-body (cdr form) env))))) | |
| 672 | |
| 673 (defun cl-macroexpand-body (body &optional env) | |
| 674 (mapcar (function (lambda (x) (cl-macroexpand-all x env))) body)) | |
| 675 | |
| 676 (defun cl-prettyexpand (form &optional full) | |
| 677 (message "Expanding...") | |
| 678 (let ((cl-macroexpand-cmacs full) (cl-compiling-file full) | |
| 679 (byte-compile-macro-environment nil)) | |
| 680 (setq form (cl-macroexpand-all form | |
| 681 (and (not full) '((block) (eval-when))))) | |
| 682 (message "Formatting...") | |
| 683 (prog1 (cl-prettyprint form) | |
| 684 (message "")))) | |
| 685 | |
|
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686 ;; XEmacs addition; force cl-macs to be available from here on when |
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687 ;; compiling files to be dumped. This is more reasonable than forcing other |
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688 ;; files to do the same, multiple times. |
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689 (eval-when-compile (or (cl-compiling-file) (load "cl-macs"))) |
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690 |
| 428 | 691 (run-hooks 'cl-extra-load-hook) |
| 692 | |
| 2153 | 693 ;; XEmacs addition |
| 428 | 694 (provide 'cl-extra) |
| 695 | |
| 2153 | 696 ;;; arch-tag: bcd03437-0871-43fb-a8f1-ad0e0b5427ed |
| 428 | 697 ;;; cl-extra.el ends here |