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428
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1 ;;; cl-extra.el --- Common Lisp extensions for GNU Emacs Lisp (part two)
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2
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3 ;; Copyright (C) 1993 Free Software Foundation, Inc.
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4
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5 ;; Author: Dave Gillespie <daveg@synaptics.com>
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6 ;; Maintainer: XEmacs Development Team
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7 ;; Version: 2.02
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8 ;; Keywords: extensions, dumped
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9
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10 ;; This file is part of XEmacs.
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify it
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13 ;; under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful, but
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18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 ;; General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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23 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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24 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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25 ;; 02111-1307, USA.
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26
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27 ;;; Synched up with: FSF 19.34.
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28
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29 ;;; Commentary:
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30
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31 ;; This file is dumped with XEmacs.
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32
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33 ;; These are extensions to Emacs Lisp that provide a degree of
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34 ;; Common Lisp compatibility, beyond what is already built-in
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35 ;; in Emacs Lisp.
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36 ;;
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37 ;; This package was written by Dave Gillespie; it is a complete
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38 ;; rewrite of Cesar Quiroz's original cl.el package of December 1986.
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39 ;;
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40 ;; This package works with Emacs 18, Emacs 19, and XEmacs/Lucid Emacs 19.
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41 ;;
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42 ;; Bug reports, comments, and suggestions are welcome!
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43
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44 ;; This file contains portions of the Common Lisp extensions
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45 ;; package which are autoloaded since they are relatively obscure.
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46
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47 ;; See cl.el for Change Log.
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48
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49
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50 ;;; Code:
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51 (eval-when-compile
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52 (require 'obsolete))
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53
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54 (or (memq 'cl-19 features)
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55 (error "Tried to load `cl-extra' before `cl'!"))
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56
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57
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58 ;;; We define these here so that this file can compile without having
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59 ;;; loaded the cl.el file already.
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60
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61 (defmacro cl-push (x place) (list 'setq place (list 'cons x place)))
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62 (defmacro cl-pop (place)
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63 (list 'car (list 'prog1 place (list 'setq place (list 'cdr place)))))
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64
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65 (defvar cl-emacs-type)
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66
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67
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68 ;;; Type coercion.
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69
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70 (defun coerce (x type)
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71 "Coerce OBJECT to type TYPE.
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72 TYPE is a Common Lisp type specifier."
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73 (cond ((eq type 'list) (if (listp x) x (append x nil)))
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74 ((eq type 'vector) (if (vectorp x) x (vconcat x)))
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75 ((eq type 'string) (if (stringp x) x (concat x)))
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76 ((eq type 'array) (if (arrayp x) x (vconcat x)))
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77 ((and (eq type 'character) (stringp x) (= (length x) 1)) (aref x 0))
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78 ((and (eq type 'character) (symbolp x)) (coerce (symbol-name x) type))
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446
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79 ((and (eq type 'character) (char-int-p x)) (int-char x))
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80 ((and (eq type 'integer) (characterp x)) (char-int x))
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428
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81 ((eq type 'float) (float x))
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82 ((eq type 'bit-vector) (if (bit-vector-p x) x
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83 (apply 'bit-vector (append x nil))))
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84 ((eq type 'weak-list)
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85 (if (weak-list-p x) x
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86 (let ((wl (make-weak-list)))
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87 (set-weak-list-list wl (if (listp x) x (append x nil)))
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88 wl)))
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89 ((typep x type) x)
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90 (t (error "Can't coerce %s to type %s" x type))))
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91
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92
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93 ;;; Predicates.
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94
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95 (defun equalp (x y)
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96 "Return t if two Lisp objects have similar structures and contents.
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97 This is like `equal', except that it accepts numerically equal
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98 numbers of different types (float vs. integer), and also compares
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99 strings case-insensitively."
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100 (cond ((eq x y) t)
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101 ((stringp x)
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102 (and (stringp y) (= (length x) (length y))
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103 (or (string-equal x y)
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104 (string-equal (downcase x) (downcase y))))) ; lazy but simple!
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105 ((characterp x)
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106 (and (characterp y)
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107 (or (char-equal x y)
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108 (char-equal (downcase x) (downcase y)))))
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109 ((numberp x)
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110 (and (numberp y) (= x y)))
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111 ((consp x)
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112 ;; XEmacs change
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113 (while (and (consp x) (consp y) (equalp (car x) (car y)))
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114 (cl-pop x) (cl-pop y))
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115 (and (not (consp x)) (equalp x y)))
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116 ((vectorp x)
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117 (and (vectorp y) (= (length x) (length y))
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118 (let ((i (length x)))
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119 (while (and (>= (setq i (1- i)) 0)
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120 (equalp (aref x i) (aref y i))))
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121 (< i 0))))
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122 (t (equal x y))))
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123
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124
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125 ;;; Control structures.
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126
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127 (defun cl-mapcar-many (cl-func cl-seqs)
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128 (if (cdr (cdr cl-seqs))
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129 (let* ((cl-res nil)
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130 (cl-n (apply 'min (mapcar 'length cl-seqs)))
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131 (cl-i 0)
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132 (cl-args (copy-sequence cl-seqs))
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133 cl-p1 cl-p2)
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134 (setq cl-seqs (copy-sequence cl-seqs))
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135 (while (< cl-i cl-n)
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136 (setq cl-p1 cl-seqs cl-p2 cl-args)
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137 (while cl-p1
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138 (setcar cl-p2
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139 (if (consp (car cl-p1))
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140 (prog1 (car (car cl-p1))
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141 (setcar cl-p1 (cdr (car cl-p1))))
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142 (aref (car cl-p1) cl-i)))
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143 (setq cl-p1 (cdr cl-p1) cl-p2 (cdr cl-p2)))
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144 (cl-push (apply cl-func cl-args) cl-res)
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145 (setq cl-i (1+ cl-i)))
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146 (nreverse cl-res))
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147 (let ((cl-res nil)
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148 (cl-x (car cl-seqs))
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149 (cl-y (nth 1 cl-seqs)))
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150 (let ((cl-n (min (length cl-x) (length cl-y)))
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151 (cl-i -1))
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152 (while (< (setq cl-i (1+ cl-i)) cl-n)
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153 (cl-push (funcall cl-func
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154 (if (consp cl-x) (cl-pop cl-x) (aref cl-x cl-i))
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155 (if (consp cl-y) (cl-pop cl-y) (aref cl-y cl-i)))
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156 cl-res)))
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157 (nreverse cl-res))))
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158
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159 (defun map (cl-type cl-func cl-seq &rest cl-rest)
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160 "Map a function across one or more sequences, returning a sequence.
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161 TYPE is the sequence type to return, FUNC is the function, and SEQS
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162 are the argument sequences."
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163 (let ((cl-res (apply 'mapcar* cl-func cl-seq cl-rest)))
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164 (and cl-type (coerce cl-res cl-type))))
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165
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166 (defun maplist (cl-func cl-list &rest cl-rest)
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167 "Map FUNC to each sublist of LIST or LISTS.
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168 Like `mapcar', except applies to lists and their cdr's rather than to
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169 the elements themselves."
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170 (if cl-rest
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171 (let ((cl-res nil)
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172 (cl-args (cons cl-list (copy-sequence cl-rest)))
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173 cl-p)
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174 (while (not (memq nil cl-args))
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175 (cl-push (apply cl-func cl-args) cl-res)
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176 (setq cl-p cl-args)
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177 (while cl-p (setcar cl-p (cdr (cl-pop cl-p)) )))
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178 (nreverse cl-res))
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179 (let ((cl-res nil))
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180 (while cl-list
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181 (cl-push (funcall cl-func cl-list) cl-res)
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182 (setq cl-list (cdr cl-list)))
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183 (nreverse cl-res))))
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184
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185
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186 (defun mapc (cl-func cl-seq &rest cl-rest)
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187 "Like `mapcar', but does not accumulate values returned by the function."
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188 (if cl-rest
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189 (apply 'map nil cl-func cl-seq cl-rest)
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190 ;; XEmacs change: in the simplest case we call mapc-internal,
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191 ;; which really doesn't accumulate any results.
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192 (mapc-internal cl-func cl-seq))
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193 cl-seq)
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194
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195 (defun mapl (cl-func cl-list &rest cl-rest)
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196 "Like `maplist', but does not accumulate values returned by the function."
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197 (if cl-rest
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198 (apply 'maplist cl-func cl-list cl-rest)
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199 (let ((cl-p cl-list))
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200 (while cl-p (funcall cl-func cl-p) (setq cl-p (cdr cl-p)))))
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201 cl-list)
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202
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203 (defun mapcan (cl-func cl-seq &rest cl-rest)
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204 "Like `mapcar', but nconc's together the values returned by the function."
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205 (apply 'nconc (apply 'mapcar* cl-func cl-seq cl-rest)))
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206
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207 (defun mapcon (cl-func cl-list &rest cl-rest)
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208 "Like `maplist', but nconc's together the values returned by the function."
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209 (apply 'nconc (apply 'maplist cl-func cl-list cl-rest)))
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210
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211 (defun some (cl-pred cl-seq &rest cl-rest)
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212 "Return true if PREDICATE is true of any element of SEQ or SEQs.
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213 If so, return the true (non-nil) value returned by PREDICATE."
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214 (if (or cl-rest (nlistp cl-seq))
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215 (catch 'cl-some
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216 (apply 'map nil
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217 (function (lambda (&rest cl-x)
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218 (let ((cl-res (apply cl-pred cl-x)))
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219 (if cl-res (throw 'cl-some cl-res)))))
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220 cl-seq cl-rest) nil)
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221 (let ((cl-x nil))
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222 (while (and cl-seq (not (setq cl-x (funcall cl-pred (cl-pop cl-seq))))))
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223 cl-x)))
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224
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225 (defun every (cl-pred cl-seq &rest cl-rest)
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226 "Return true if PREDICATE is true of every element of SEQ or SEQs."
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227 (if (or cl-rest (nlistp cl-seq))
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228 (catch 'cl-every
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229 (apply 'map nil
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230 (function (lambda (&rest cl-x)
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231 (or (apply cl-pred cl-x) (throw 'cl-every nil))))
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232 cl-seq cl-rest) t)
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233 (while (and cl-seq (funcall cl-pred (car cl-seq)))
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234 (setq cl-seq (cdr cl-seq)))
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235 (null cl-seq)))
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236
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237 (defun notany (cl-pred cl-seq &rest cl-rest)
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238 "Return true if PREDICATE is false of every element of SEQ or SEQs."
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239 (not (apply 'some cl-pred cl-seq cl-rest)))
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240
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241 (defun notevery (cl-pred cl-seq &rest cl-rest)
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242 "Return true if PREDICATE is false of some element of SEQ or SEQs."
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243 (not (apply 'every cl-pred cl-seq cl-rest)))
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244
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245 ;;; Support for `loop'.
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246 (defun cl-map-keymap (cl-func cl-map)
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247 (while (symbolp cl-map) (setq cl-map (symbol-function cl-map)))
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248 (if (eq cl-emacs-type 'lucid) (funcall 'map-keymap cl-func cl-map)
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249 (if (listp cl-map)
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250 (let ((cl-p cl-map))
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251 (while (consp (setq cl-p (cdr cl-p)))
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252 (cond ((consp (car cl-p))
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253 (funcall cl-func (car (car cl-p)) (cdr (car cl-p))))
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254 ((vectorp (car cl-p))
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255 (cl-map-keymap cl-func (car cl-p)))
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256 ((eq (car cl-p) 'keymap)
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257 (setq cl-p nil)))))
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258 (let ((cl-i -1))
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259 (while (< (setq cl-i (1+ cl-i)) (length cl-map))
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260 (if (aref cl-map cl-i)
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261 (funcall cl-func cl-i (aref cl-map cl-i))))))))
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262
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263 (defun cl-map-keymap-recursively (cl-func-rec cl-map &optional cl-base)
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264 (or cl-base
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265 (setq cl-base (copy-sequence (if (eq cl-emacs-type 18) "0" [0]))))
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266 (cl-map-keymap
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267 (function
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268 (lambda (cl-key cl-bind)
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269 (aset cl-base (1- (length cl-base)) cl-key)
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270 (if (keymapp cl-bind)
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271 (cl-map-keymap-recursively
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272 cl-func-rec cl-bind
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273 (funcall (if (eq cl-emacs-type 18) 'concat 'vconcat)
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274 cl-base (list 0)))
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275 (funcall cl-func-rec cl-base cl-bind))))
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276 cl-map))
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277
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278 (defun cl-map-intervals (cl-func &optional cl-what cl-prop cl-start cl-end)
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279 (or cl-what (setq cl-what (current-buffer)))
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280 (if (bufferp cl-what)
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281 (let (cl-mark cl-mark2 (cl-next t) cl-next2)
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282 (save-excursion
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283 (set-buffer cl-what)
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284 (setq cl-mark (copy-marker (or cl-start (point-min))))
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285 (setq cl-mark2 (and cl-end (copy-marker cl-end))))
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286 (while (and cl-next (or (not cl-mark2) (< cl-mark cl-mark2)))
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287 (setq cl-next (and (fboundp 'next-property-change)
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288 (if cl-prop (next-single-property-change
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289 cl-mark cl-prop cl-what)
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290 (next-property-change cl-mark cl-what)))
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291 cl-next2 (or cl-next (save-excursion
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292 (set-buffer cl-what) (point-max))))
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293 (funcall cl-func (prog1 (marker-position cl-mark)
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294 (set-marker cl-mark cl-next2))
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295 (if cl-mark2 (min cl-next2 cl-mark2) cl-next2)))
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296 (set-marker cl-mark nil) (if cl-mark2 (set-marker cl-mark2 nil)))
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297 (or cl-start (setq cl-start 0))
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298 (or cl-end (setq cl-end (length cl-what)))
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299 (while (< cl-start cl-end)
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300 (let ((cl-next (or (and (fboundp 'next-property-change)
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301 (if cl-prop (next-single-property-change
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302 cl-start cl-prop cl-what)
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303 (next-property-change cl-start cl-what)))
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304 cl-end)))
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305 (funcall cl-func cl-start (min cl-next cl-end))
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306 (setq cl-start cl-next)))))
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307
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308 (defun cl-map-overlays (cl-func &optional cl-buffer cl-start cl-end cl-arg)
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309 (or cl-buffer (setq cl-buffer (current-buffer)))
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502
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310 (with-fboundp '(overlay-start overlay-end overlays-at next-overlay-change)
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311 (if-fboundp 'overlay-lists
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428
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312
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502
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313 ;; This is the preferred algorithm, though overlay-lists is
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314 ;; undocumented.
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315 (let (cl-ovl)
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316 (save-excursion
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317 (set-buffer cl-buffer)
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318 (setq cl-ovl (overlay-lists))
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319 (if cl-start (setq cl-start (copy-marker cl-start)))
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320 (if cl-end (setq cl-end (copy-marker cl-end))))
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321 (setq cl-ovl (nconc (car cl-ovl) (cdr cl-ovl)))
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322 (while (and cl-ovl
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323 (or (not (overlay-start (car cl-ovl)))
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324 (and cl-end (>= (overlay-start (car cl-ovl)) cl-end))
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325 (and cl-start (<= (overlay-end (car cl-ovl))
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326 cl-start))
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327 (not (funcall cl-func (car cl-ovl) cl-arg))))
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328 (setq cl-ovl (cdr cl-ovl)))
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329 (if cl-start (set-marker cl-start nil))
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330 (if cl-end (set-marker cl-end nil)))
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331
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332 ;; This alternate algorithm fails to find zero-length overlays.
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333 (let ((cl-mark (save-excursion (set-buffer cl-buffer)
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334 (copy-marker (or cl-start (point-min)))))
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335 (cl-mark2 (and cl-end (save-excursion (set-buffer cl-buffer)
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336 (copy-marker cl-end))))
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337 cl-pos cl-ovl)
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338 (while (save-excursion
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339 (and (setq cl-pos (marker-position cl-mark))
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340 (< cl-pos (or cl-mark2 (point-max)))
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341 (progn
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342 (set-buffer cl-buffer)
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343 (setq cl-ovl (overlays-at cl-pos))
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344 (set-marker cl-mark (next-overlay-change cl-pos)))))
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345 (while (and cl-ovl
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346 (or (/= (overlay-start (car cl-ovl)) cl-pos)
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347 (not (and (funcall cl-func (car cl-ovl) cl-arg)
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348 (set-marker cl-mark nil)))))
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349 (setq cl-ovl (cdr cl-ovl))))
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|
350 (set-marker cl-mark nil) (if cl-mark2 (set-marker cl-mark2 nil))))))
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428
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351
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|
352 ;;; Support for `setf'.
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353 (defun cl-set-frame-visible-p (frame val)
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|
354 (cond ((null val) (make-frame-invisible frame))
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355 ((eq val 'icon) (iconify-frame frame))
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356 (t (make-frame-visible frame)))
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357 val)
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358
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359 ;;; Support for `progv'.
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360 (defvar cl-progv-save)
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361 (defun cl-progv-before (syms values)
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362 (while syms
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363 (cl-push (if (boundp (car syms))
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364 (cons (car syms) (symbol-value (car syms)))
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365 (car syms)) cl-progv-save)
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366 (if values
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367 (set (cl-pop syms) (cl-pop values))
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368 (makunbound (cl-pop syms)))))
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369
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370 (defun cl-progv-after ()
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371 (while cl-progv-save
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372 (if (consp (car cl-progv-save))
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373 (set (car (car cl-progv-save)) (cdr (car cl-progv-save)))
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374 (makunbound (car cl-progv-save)))
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375 (cl-pop cl-progv-save)))
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376
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377
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378 ;;; Numbers.
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379
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|
380 (defun gcd (&rest args)
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|
381 "Return the greatest common divisor of the arguments."
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382 (let ((a (abs (or (cl-pop args) 0))))
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383 (while args
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384 (let ((b (abs (cl-pop args))))
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385 (while (> b 0) (setq b (% a (setq a b))))))
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386 a))
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387
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|
388 (defun lcm (&rest args)
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389 "Return the least common multiple of the arguments."
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390 (if (memq 0 args)
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391 0
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392 (let ((a (abs (or (cl-pop args) 1))))
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393 (while args
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394 (let ((b (abs (cl-pop args))))
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395 (setq a (* (/ a (gcd a b)) b))))
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396 a)))
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397
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|
398 (defun isqrt (a)
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|
399 "Return the integer square root of the argument."
|
|
|
400 (if (and (integerp a) (> a 0))
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|
401 ;; XEmacs change
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|
402 (let ((g (cond ((>= a 1000000) 10000) ((>= a 10000) 1000)
|
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|
403 ((>= a 100) 100) (t 10)))
|
|
|
404 g2)
|
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|
405 (while (< (setq g2 (/ (+ g (/ a g)) 2)) g)
|
|
|
406 (setq g g2))
|
|
|
407 g)
|
|
|
408 (if (eq a 0) 0 (signal 'arith-error nil))))
|
|
|
409
|
|
|
410 (defun cl-expt (x y)
|
|
|
411 "Return X raised to the power of Y. Works only for integer arguments."
|
|
|
412 (if (<= y 0) (if (= y 0) 1 (if (memq x '(-1 1)) (cl-expt x (- y)) 0))
|
|
|
413 (* (if (= (% y 2) 0) 1 x) (cl-expt (* x x) (/ y 2)))))
|
|
|
414 (or (and (fboundp 'expt) (subrp (symbol-function 'expt)))
|
|
|
415 (defalias 'expt 'cl-expt))
|
|
|
416
|
|
|
417 (defun floor* (x &optional y)
|
|
|
418 "Return a list of the floor of X and the fractional part of X.
|
|
|
419 With two arguments, return floor and remainder of their quotient."
|
|
|
420 (let ((q (floor x y)))
|
|
|
421 (list q (- x (if y (* y q) q)))))
|
|
|
422
|
|
|
423 (defun ceiling* (x &optional y)
|
|
|
424 "Return a list of the ceiling of X and the fractional part of X.
|
|
|
425 With two arguments, return ceiling and remainder of their quotient."
|
|
|
426 (let ((res (floor* x y)))
|
|
|
427 (if (= (car (cdr res)) 0) res
|
|
|
428 (list (1+ (car res)) (- (car (cdr res)) (or y 1))))))
|
|
|
429
|
|
|
430 (defun truncate* (x &optional y)
|
|
|
431 "Return a list of the integer part of X and the fractional part of X.
|
|
|
432 With two arguments, return truncation and remainder of their quotient."
|
|
|
433 (if (eq (>= x 0) (or (null y) (>= y 0)))
|
|
|
434 (floor* x y) (ceiling* x y)))
|
|
|
435
|
|
|
436 (defun round* (x &optional y)
|
|
|
437 "Return a list of X rounded to the nearest integer and the remainder.
|
|
|
438 With two arguments, return rounding and remainder of their quotient."
|
|
|
439 (if y
|
|
|
440 (if (and (integerp x) (integerp y))
|
|
|
441 (let* ((hy (/ y 2))
|
|
|
442 (res (floor* (+ x hy) y)))
|
|
|
443 (if (and (= (car (cdr res)) 0)
|
|
|
444 (= (+ hy hy) y)
|
|
|
445 (/= (% (car res) 2) 0))
|
|
|
446 (list (1- (car res)) hy)
|
|
|
447 (list (car res) (- (car (cdr res)) hy))))
|
|
|
448 (let ((q (round (/ x y))))
|
|
|
449 (list q (- x (* q y)))))
|
|
|
450 (if (integerp x) (list x 0)
|
|
|
451 (let ((q (round x)))
|
|
|
452 (list q (- x q))))))
|
|
|
453
|
|
|
454 (defun mod* (x y)
|
|
|
455 "The remainder of X divided by Y, with the same sign as Y."
|
|
|
456 (nth 1 (floor* x y)))
|
|
|
457
|
|
|
458 (defun rem* (x y)
|
|
|
459 "The remainder of X divided by Y, with the same sign as X."
|
|
|
460 (nth 1 (truncate* x y)))
|
|
|
461
|
|
|
462 (defun signum (a)
|
|
|
463 "Return 1 if A is positive, -1 if negative, 0 if zero."
|
|
|
464 (cond ((> a 0) 1) ((< a 0) -1) (t 0)))
|
|
|
465
|
|
|
466
|
|
|
467 ;; Random numbers.
|
|
|
468
|
|
|
469 (defvar *random-state*)
|
|
|
470 (defun random* (lim &optional state)
|
|
|
471 "Return a random nonnegative number less than LIM, an integer or float.
|
|
|
472 Optional second arg STATE is a random-state object."
|
|
|
473 (or state (setq state *random-state*))
|
|
|
474 ;; Inspired by "ran3" from Numerical Recipes. Additive congruential method.
|
|
|
475 (let ((vec (aref state 3)))
|
|
|
476 (if (integerp vec)
|
|
|
477 (let ((i 0) (j (- 1357335 (% (abs vec) 1357333))) (k 1))
|
|
|
478 (aset state 3 (setq vec (make-vector 55 nil)))
|
|
|
479 (aset vec 0 j)
|
|
|
480 (while (> (setq i (% (+ i 21) 55)) 0)
|
|
|
481 (aset vec i (setq j (prog1 k (setq k (- j k))))))
|
|
|
482 (while (< (setq i (1+ i)) 200) (random* 2 state))))
|
|
|
483 (let* ((i (aset state 1 (% (1+ (aref state 1)) 55)))
|
|
|
484 (j (aset state 2 (% (1+ (aref state 2)) 55)))
|
|
|
485 (n (logand 8388607 (aset vec i (- (aref vec i) (aref vec j))))))
|
|
|
486 (if (integerp lim)
|
|
|
487 (if (<= lim 512) (% n lim)
|
|
|
488 (if (> lim 8388607) (setq n (+ (lsh n 9) (random* 512 state))))
|
|
|
489 (let ((mask 1023))
|
|
|
490 (while (< mask (1- lim)) (setq mask (1+ (+ mask mask))))
|
|
|
491 (if (< (setq n (logand n mask)) lim) n (random* lim state))))
|
|
|
492 (* (/ n '8388608e0) lim)))))
|
|
|
493
|
|
|
494 (defun make-random-state (&optional state)
|
|
|
495 "Return a copy of random-state STATE, or of `*random-state*' if omitted.
|
|
|
496 If STATE is t, return a new state object seeded from the time of day."
|
|
|
497 (cond ((null state) (make-random-state *random-state*))
|
|
|
498 ((vectorp state) (cl-copy-tree state t))
|
|
|
499 ((integerp state) (vector 'cl-random-state-tag -1 30 state))
|
|
|
500 (t (make-random-state (cl-random-time)))))
|
|
|
501
|
|
|
502 (defun random-state-p (object)
|
|
|
503 "Return t if OBJECT is a random-state object."
|
|
|
504 (and (vectorp object) (= (length object) 4)
|
|
|
505 (eq (aref object 0) 'cl-random-state-tag)))
|
|
|
506
|
|
|
507
|
|
|
508 ;; Implementation limits.
|
|
|
509
|
|
|
510 (defun cl-finite-do (func a b)
|
|
|
511 (condition-case nil
|
|
|
512 (let ((res (funcall func a b))) ; check for IEEE infinity
|
|
|
513 (and (numberp res) (/= res (/ res 2)) res))
|
|
|
514 (arith-error nil)))
|
|
|
515
|
|
|
516 (defvar most-positive-float)
|
|
|
517 (defvar most-negative-float)
|
|
|
518 (defvar least-positive-float)
|
|
|
519 (defvar least-negative-float)
|
|
|
520 (defvar least-positive-normalized-float)
|
|
|
521 (defvar least-negative-normalized-float)
|
|
|
522 (defvar float-epsilon)
|
|
|
523 (defvar float-negative-epsilon)
|
|
|
524
|
|
|
525 (defun cl-float-limits ()
|
|
|
526 (or most-positive-float (not (numberp '2e1))
|
|
|
527 (let ((x '2e0) y z)
|
|
|
528 ;; Find maximum exponent (first two loops are optimizations)
|
|
|
529 (while (cl-finite-do '* x x) (setq x (* x x)))
|
|
|
530 (while (cl-finite-do '* x (/ x 2)) (setq x (* x (/ x 2))))
|
|
|
531 (while (cl-finite-do '+ x x) (setq x (+ x x)))
|
|
|
532 (setq z x y (/ x 2))
|
|
|
533 ;; Now fill in 1's in the mantissa.
|
|
|
534 (while (and (cl-finite-do '+ x y) (/= (+ x y) x))
|
|
|
535 (setq x (+ x y) y (/ y 2)))
|
|
|
536 (setq most-positive-float x
|
|
|
537 most-negative-float (- x))
|
|
|
538 ;; Divide down until mantissa starts rounding.
|
|
|
539 (setq x (/ x z) y (/ 16 z) x (* x y))
|
|
|
540 (while (condition-case nil (and (= x (* (/ x 2) 2)) (> (/ y 2) 0))
|
|
|
541 (arith-error nil))
|
|
|
542 (setq x (/ x 2) y (/ y 2)))
|
|
|
543 (setq least-positive-normalized-float y
|
|
|
544 least-negative-normalized-float (- y))
|
|
|
545 ;; Divide down until value underflows to zero.
|
|
|
546 (setq x (/ 1 z) y x)
|
|
|
547 (while (condition-case nil (> (/ x 2) 0) (arith-error nil))
|
|
|
548 (setq x (/ x 2)))
|
|
|
549 (setq least-positive-float x
|
|
|
550 least-negative-float (- x))
|
|
|
551 (setq x '1e0)
|
|
|
552 (while (/= (+ '1e0 x) '1e0) (setq x (/ x 2)))
|
|
|
553 (setq float-epsilon (* x 2))
|
|
|
554 (setq x '1e0)
|
|
|
555 (while (/= (- '1e0 x) '1e0) (setq x (/ x 2)))
|
|
|
556 (setq float-negative-epsilon (* x 2))))
|
|
|
557 nil)
|
|
|
558
|
|
|
559
|
|
|
560 ;;; Sequence functions.
|
|
|
561
|
|
|
562 ;XEmacs -- our built-in is more powerful.
|
|
|
563 ;(defun subseq (seq start &optional end)
|
|
|
564 ; "Return the subsequence of SEQ from START to END.
|
|
|
565 ;If END is omitted, it defaults to the length of the sequence.
|
|
|
566 ;If START or END is negative, it counts from the end."
|
|
|
567 ; (if (stringp seq) (substring seq start end)
|
|
|
568 ; (let (len)
|
|
|
569 ; (and end (< end 0) (setq end (+ end (setq len (length seq)))))
|
|
|
570 ; (if (< start 0) (setq start (+ start (or len (setq len (length seq))))))
|
|
|
571 ; (cond ((listp seq)
|
|
|
572 ; (if (> start 0) (setq seq (nthcdr start seq)))
|
|
|
573 ; (if end
|
|
|
574 ; (let ((res nil))
|
|
|
575 ; (while (>= (setq end (1- end)) start)
|
|
|
576 ; (cl-push (cl-pop seq) res))
|
|
|
577 ; (nreverse res))
|
|
|
578 ; (copy-sequence seq)))
|
|
|
579 ; (t
|
|
|
580 ; (or end (setq end (or len (length seq))))
|
|
|
581 ; (let ((res (make-vector (max (- end start) 0) nil))
|
|
|
582 ; (i 0))
|
|
|
583 ; (while (< start end)
|
|
|
584 ; (aset res i (aref seq start))
|
|
|
585 ; (setq i (1+ i) start (1+ start)))
|
|
|
586 ; res))))))
|
|
|
587
|
|
|
588 (defun concatenate (type &rest seqs)
|
|
|
589 "Concatenate, into a sequence of type TYPE, the argument SEQUENCES."
|
|
|
590 (case type
|
|
|
591 (vector (apply 'vconcat seqs))
|
|
|
592 (string (apply 'concat seqs))
|
|
|
593 (list (apply 'append (append seqs '(nil))))
|
|
|
594 (t (error "Not a sequence type name: %s" type))))
|
|
|
595
|
|
|
596 ;;; List functions.
|
|
|
597
|
|
|
598 (defun revappend (x y)
|
|
|
599 "Equivalent to (append (reverse X) Y)."
|
|
|
600 (nconc (reverse x) y))
|
|
|
601
|
|
|
602 (defun nreconc (x y)
|
|
|
603 "Equivalent to (nconc (nreverse X) Y)."
|
|
|
604 (nconc (nreverse x) y))
|
|
|
605
|
|
|
606 (defun list-length (x)
|
|
|
607 "Return the length of a list. Return nil if list is circular."
|
|
|
608 (let ((n 0) (fast x) (slow x))
|
|
|
609 (while (and (cdr fast) (not (and (eq fast slow) (> n 0))))
|
|
|
610 (setq n (+ n 2) fast (cdr (cdr fast)) slow (cdr slow)))
|
|
|
611 (if fast (if (cdr fast) nil (1+ n)) n)))
|
|
|
612
|
|
|
613 (defun tailp (sublist list)
|
|
|
614 "Return true if SUBLIST is a tail of LIST."
|
|
|
615 (while (and (consp list) (not (eq sublist list)))
|
|
|
616 (setq list (cdr list)))
|
|
|
617 (if (numberp sublist) (equal sublist list) (eq sublist list)))
|
|
|
618
|
|
|
619 (defun cl-copy-tree (tree &optional vecp)
|
|
|
620 "Make a copy of TREE.
|
|
|
621 If TREE is a cons cell, this recursively copies both its car and its cdr.
|
|
|
622 Contrast to copy-sequence, which copies only along the cdrs. With second
|
|
|
623 argument VECP, this copies vectors as well as conses."
|
|
|
624 (if (consp tree)
|
|
|
625 (let ((p (setq tree (copy-list tree))))
|
|
|
626 (while (consp p)
|
|
|
627 (if (or (consp (car p)) (and vecp (vectorp (car p))))
|
|
|
628 (setcar p (cl-copy-tree (car p) vecp)))
|
|
|
629 (or (listp (cdr p)) (setcdr p (cl-copy-tree (cdr p) vecp)))
|
|
|
630 (cl-pop p)))
|
|
|
631 (if (and vecp (vectorp tree))
|
|
|
632 (let ((i (length (setq tree (copy-sequence tree)))))
|
|
|
633 (while (>= (setq i (1- i)) 0)
|
|
|
634 (aset tree i (cl-copy-tree (aref tree i) vecp))))))
|
|
|
635 tree)
|
|
|
636 (or (and (fboundp 'copy-tree) (subrp (symbol-function 'copy-tree)))
|
|
|
637 (defalias 'copy-tree 'cl-copy-tree))
|
|
|
638
|
|
|
639
|
|
|
640 ;;; Property lists.
|
|
|
641
|
|
|
642 ;; XEmacs: our `get' groks DEFAULT.
|
|
|
643 (defalias 'get* 'get)
|
|
442
|
644 (defalias 'getf 'plist-get)
|
|
428
|
645
|
|
|
646 (defun cl-set-getf (plist tag val)
|
|
|
647 (let ((p plist))
|
|
|
648 (while (and p (not (eq (car p) tag))) (setq p (cdr (cdr p))))
|
|
|
649 (if p (progn (setcar (cdr p) val) plist) (list* tag val plist))))
|
|
|
650
|
|
|
651 (defun cl-do-remf (plist tag)
|
|
|
652 (let ((p (cdr plist)))
|
|
|
653 (while (and (cdr p) (not (eq (car (cdr p)) tag))) (setq p (cdr (cdr p))))
|
|
|
654 (and (cdr p) (progn (setcdr p (cdr (cdr (cdr p)))) t))))
|
|
|
655
|
|
|
656 ;;; Hash tables.
|
|
|
657
|
|
|
658 ;; The `regular' Common Lisp hash-table stuff has been moved into C.
|
|
|
659 ;; Only backward compatibility stuff remains here.
|
|
|
660 (defun make-hashtable (size &optional test)
|
|
|
661 (make-hash-table :test test :size size))
|
|
|
662 (defun make-weak-hashtable (size &optional test)
|
|
|
663 (make-hash-table :test test :size size :weakness t))
|
|
|
664 (defun make-key-weak-hashtable (size &optional test)
|
|
|
665 (make-hash-table :test test :size size :weakness 'key))
|
|
|
666 (defun make-value-weak-hashtable (size &optional test)
|
|
|
667 (make-hash-table :test test :size size :weakness 'value))
|
|
|
668
|
|
|
669 (define-obsolete-function-alias 'hashtablep 'hash-table-p)
|
|
|
670 (define-obsolete-function-alias 'hashtable-fullness 'hash-table-count)
|
|
|
671 (define-obsolete-function-alias 'hashtable-test-function 'hash-table-test)
|
|
|
672 (define-obsolete-function-alias 'hashtable-type 'hash-table-type)
|
|
|
673 (define-obsolete-function-alias 'hashtable-size 'hash-table-size)
|
|
|
674 (define-obsolete-function-alias 'copy-hashtable 'copy-hash-table)
|
|
|
675
|
|
|
676 (make-obsolete 'make-hashtable 'make-hash-table)
|
|
|
677 (make-obsolete 'make-weak-hashtable 'make-hash-table)
|
|
|
678 (make-obsolete 'make-key-weak-hashtable 'make-hash-table)
|
|
|
679 (make-obsolete 'make-value-weak-hashtable 'make-hash-table)
|
|
|
680 (make-obsolete 'hash-table-type 'hash-table-weakness)
|
|
|
681
|
|
|
682 (when (fboundp 'x-keysym-hash-table)
|
|
|
683 (make-obsolete 'x-keysym-hashtable 'x-keysym-hash-table))
|
|
|
684
|
|
|
685 ;; Compatibility stuff for old kludgy cl.el hash table implementation
|
|
|
686 (defvar cl-builtin-gethash (symbol-function 'gethash))
|
|
|
687 (defvar cl-builtin-remhash (symbol-function 'remhash))
|
|
|
688 (defvar cl-builtin-clrhash (symbol-function 'clrhash))
|
|
|
689 (defvar cl-builtin-maphash (symbol-function 'maphash))
|
|
|
690
|
|
|
691 (defalias 'cl-gethash 'gethash)
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692 (defalias 'cl-puthash 'puthash)
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693 (defalias 'cl-remhash 'remhash)
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694 (defalias 'cl-clrhash 'clrhash)
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695 (defalias 'cl-maphash 'maphash)
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696
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697 ;;; Some debugging aids.
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698
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699 (defun cl-prettyprint (form)
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700 "Insert a pretty-printed rendition of a Lisp FORM in current buffer."
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701 (let ((pt (point)) last)
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702 (insert "\n" (prin1-to-string form) "\n")
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703 (setq last (point))
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704 (goto-char (1+ pt))
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705 (while (search-forward "(quote " last t)
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706 (delete-backward-char 7)
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707 (insert "'")
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708 (forward-sexp)
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709 (delete-char 1))
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710 (goto-char (1+ pt))
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711 (cl-do-prettyprint)))
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712
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713 (defun cl-do-prettyprint ()
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714 (skip-chars-forward " ")
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715 (if (looking-at "(")
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716 (let ((skip (or (looking-at "((") (looking-at "(prog")
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717 (looking-at "(unwind-protect ")
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718 (looking-at "(function (")
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719 (looking-at "(cl-block-wrapper ")))
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720 (two (or (looking-at "(defun ") (looking-at "(defmacro ")))
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721 (let (or (looking-at "(let\\*? ") (looking-at "(while ")))
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722 (set (looking-at "(p?set[qf] ")))
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723 (if (or skip let
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724 (progn
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725 (forward-sexp)
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726 (and (>= (current-column) 78) (progn (backward-sexp) t))))
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727 (let ((nl t))
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728 (forward-char 1)
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729 (cl-do-prettyprint)
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730 (or skip (looking-at ")") (cl-do-prettyprint))
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731 (or (not two) (looking-at ")") (cl-do-prettyprint))
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732 (while (not (looking-at ")"))
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733 (if set (setq nl (not nl)))
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734 (if nl (insert "\n"))
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735 (lisp-indent-line)
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736 (cl-do-prettyprint))
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737 (forward-char 1))))
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738 (forward-sexp)))
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739
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740 (defvar cl-macroexpand-cmacs nil)
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741 (defvar cl-closure-vars nil)
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742
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743 (defun cl-macroexpand-all (form &optional env)
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744 "Expand all macro calls through a Lisp FORM.
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745 This also does some trivial optimizations to make the form prettier."
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746 (while (or (not (eq form (setq form (macroexpand form env))))
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747 (and cl-macroexpand-cmacs
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748 (not (eq form (setq form (compiler-macroexpand form)))))))
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749 (cond ((not (consp form)) form)
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750 ((memq (car form) '(let let*))
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751 (if (null (nth 1 form))
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752 (cl-macroexpand-all (cons 'progn (cddr form)) env)
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753 (let ((letf nil) (res nil) (lets (cadr form)))
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754 (while lets
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755 (cl-push (if (consp (car lets))
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756 (let ((exp (cl-macroexpand-all (caar lets) env)))
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757 (or (symbolp exp) (setq letf t))
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758 (cons exp (cl-macroexpand-body (cdar lets) env)))
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759 (let ((exp (cl-macroexpand-all (car lets) env)))
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|
760 (if (symbolp exp) exp
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761 (setq letf t) (list exp nil)))) res)
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|
762 (setq lets (cdr lets)))
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|
763 (list* (if letf (if (eq (car form) 'let) 'letf 'letf*) (car form))
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764 (nreverse res) (cl-macroexpand-body (cddr form) env)))))
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765 ((eq (car form) 'cond)
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766 (cons (car form)
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767 (mapcar (function (lambda (x) (cl-macroexpand-body x env)))
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768 (cdr form))))
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769 ((eq (car form) 'condition-case)
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770 (list* (car form) (nth 1 form) (cl-macroexpand-all (nth 2 form) env)
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771 (mapcar (function
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772 (lambda (x)
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773 (cons (car x) (cl-macroexpand-body (cdr x) env))))
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|
774 (cdddr form))))
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775 ((memq (car form) '(quote function))
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776 (if (eq (car-safe (nth 1 form)) 'lambda)
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777 (let ((body (cl-macroexpand-body (cddadr form) env)))
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778 (if (and cl-closure-vars (eq (car form) 'function)
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779 (cl-expr-contains-any body cl-closure-vars))
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|
780 (let* ((new (mapcar 'gensym cl-closure-vars))
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|
781 (sub (pairlis cl-closure-vars new)) (decls nil))
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|
782 (while (or (stringp (car body))
|
|
|
783 (eq (car-safe (car body)) 'interactive))
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|
|
784 (cl-push (list 'quote (cl-pop body)) decls))
|
|
|
785 (put (car (last cl-closure-vars)) 'used t)
|
|
|
786 (append
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|
|
787 (list 'list '(quote lambda) '(quote (&rest --cl-rest--)))
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|
|
788 (sublis sub (nreverse decls))
|
|
|
789 (list
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|
|
790 (list* 'list '(quote apply)
|
|
|
791 (list 'list '(quote quote)
|
|
|
792 (list 'function
|
|
|
793 (list* 'lambda
|
|
|
794 (append new (cadadr form))
|
|
|
795 (sublis sub body))))
|
|
|
796 (nconc (mapcar (function
|
|
|
797 (lambda (x)
|
|
|
798 (list 'list '(quote quote) x)))
|
|
|
799 cl-closure-vars)
|
|
|
800 '((quote --cl-rest--)))))))
|
|
|
801 (list (car form) (list* 'lambda (cadadr form) body))))
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|
|
802 (let ((found (assq (cadr form) env)))
|
|
|
803 (if (eq (cadr (caddr found)) 'cl-labels-args)
|
|
|
804 (cl-macroexpand-all (cadr (caddr (cadddr found))) env)
|
|
|
805 form))))
|
|
|
806 ((memq (car form) '(defun defmacro))
|
|
|
807 (list* (car form) (nth 1 form) (cl-macroexpand-body (cddr form) env)))
|
|
|
808 ((and (eq (car form) 'progn) (not (cddr form)))
|
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|
809 (cl-macroexpand-all (nth 1 form) env))
|
|
|
810 ((eq (car form) 'setq)
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|
811 (let* ((args (cl-macroexpand-body (cdr form) env)) (p args))
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|
812 (while (and p (symbolp (car p))) (setq p (cddr p)))
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|
813 (if p (cl-macroexpand-all (cons 'setf args)) (cons 'setq args))))
|
|
|
814 (t (cons (car form) (cl-macroexpand-body (cdr form) env)))))
|
|
|
815
|
|
|
816 (defun cl-macroexpand-body (body &optional env)
|
|
|
817 (mapcar (function (lambda (x) (cl-macroexpand-all x env))) body))
|
|
|
818
|
|
|
819 (defun cl-prettyexpand (form &optional full)
|
|
|
820 (message "Expanding...")
|
|
|
821 (let ((cl-macroexpand-cmacs full) (cl-compiling-file full)
|
|
|
822 (byte-compile-macro-environment nil))
|
|
|
823 (setq form (cl-macroexpand-all form
|
|
|
824 (and (not full) '((block) (eval-when)))))
|
|
|
825 (message "Formatting...")
|
|
|
826 (prog1 (cl-prettyprint form)
|
|
|
827 (message ""))))
|
|
|
828
|
|
|
829
|
|
|
830
|
|
|
831 (run-hooks 'cl-extra-load-hook)
|
|
|
832
|
|
|
833 (provide 'cl-extra)
|
|
|
834
|
|
|
835 ;;; cl-extra.el ends here
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