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428
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1 ;;; subr.el --- basic lisp subroutines for XEmacs
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2
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3 ;; Copyright (C) 1985, 1986, 1992, 1994-5, 1997 Free Software Foundation, Inc.
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4 ;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
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5 ;; Copyright (C) 1995 Sun Microsystems.
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1333
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6 ;; Copyright (C) 2000, 2001, 2002, 2003 Ben Wing.
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428
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7
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8 ;; Maintainer: XEmacs Development Team
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9 ;; Keywords: extensions, dumped
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10
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11 ;; This file is part of XEmacs.
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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
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15 ;; the Free Software Foundation; either version 2, or (at your option)
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16 ;; any later version.
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17
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18 ;; XEmacs is distributed in the hope that it will be useful, but
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19 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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21 ;; General Public License for more details.
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22
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23 ;; You should have received a copy of the GNU General Public License
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24 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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25 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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26 ;; 02111-1307, USA.
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27
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1333
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28 ;;; Synched up with: FSF 19.34. Some things synched up with later versions.
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428
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29
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30 ;;; Commentary:
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31
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32 ;; This file is dumped with XEmacs.
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33
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34 ;; There's not a whole lot in common now with the FSF version,
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35 ;; be wary when applying differences. I've left in a number of lines
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36 ;; of commentary just to give diff(1) something to synch itself with to
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37 ;; provide useful context diffs. -sb
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38
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1333
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39 ;; BEGIN SYNCHED WITH FSF 21.2
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40
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428
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41 ;;; Code:
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1333
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42 (defvar custom-declare-variable-list nil
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43 "Record `defcustom' calls made before `custom.el' is loaded to handle them.
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44 Each element of this list holds the arguments to one call to `defcustom'.")
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428
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45
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46 ;; Use this, rather than defcustom, in subr.el and other files loaded
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47 ;; before custom.el.
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48 (defun custom-declare-variable-early (&rest arguments)
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49 (setq custom-declare-variable-list
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50 (cons arguments custom-declare-variable-list)))
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428
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51
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52 ;;;; Lisp language features.
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53
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54 (defmacro lambda (&rest cdr)
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55 "Return a lambda expression.
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56 A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is
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57 self-quoting; the result of evaluating the lambda expression is the
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58 expression itself. The lambda expression may then be treated as a
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59 function, i.e., stored as the function value of a symbol, passed to
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60 funcall or mapcar, etc.
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61
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62 ARGS should take the same form as an argument list for a `defun'.
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63 DOCSTRING is an optional documentation string.
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64 If present, it should describe how to call the function.
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65 But documentation strings are usually not useful in nameless functions.
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66 INTERACTIVE should be a call to the function `interactive', which see.
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67 It may also be omitted.
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68 BODY should be a list of lisp expressions."
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69 `(function (lambda ,@cdr)))
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70
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1333
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71 ;; FSF 21.2 has various basic macros here. We don't because they're either
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72 ;; in cl*.el (which we dump and hence is always available) or built-in.
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73
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74 ;; More powerful versions in cl.el.
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75 ;(defmacro push (newelt listname)
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76 ;(defmacro pop (listname)
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77
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78 ;; Built-in.
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79 ;(defmacro when (cond &rest body)
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80 ;(defmacro unless (cond &rest body)
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81
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82 ;; More powerful versions in cl-macs.el.
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83 ;(defmacro dolist (spec &rest body)
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84 ;(defmacro dotimes (spec &rest body)
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85
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86 ;; In cl.el. Ours are defun, but cl arranges for them to be inlined anyway.
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87 ;(defsubst caar (x)
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88 ;(defsubst cadr (x)
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89 ;(defsubst cdar (x)
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90 ;(defsubst cddr (x)
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91
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92 ;; Built-in. Our `last' is more powerful in that it handles circularity.
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93 ;(defun last (x &optional n)
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94 ;(defun butlast (x &optional n)
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95 ;(defun nbutlast (x &optional n)
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96
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97 ;; In cl-seq.el.
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98 ;(defun remove (elt seq)
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99 ;(defun remq (elt list)
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100
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428
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101 (defmacro defun-when-void (&rest args)
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102 "Define a function, just like `defun', unless it's already defined.
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103 Used for compatibility among different emacs variants."
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104 `(if (fboundp ',(car args))
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105 nil
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106 (defun ,@args)))
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107
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108 (defmacro define-function-when-void (&rest args)
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109 "Define a function, just like `define-function', unless it's already defined.
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110 Used for compatibility among different emacs variants."
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111 `(if (fboundp ,(car args))
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112 nil
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113 (define-function ,@args)))
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114
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115
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116 (defun assoc-default (key alist &optional test default)
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117 "Find object KEY in a pseudo-alist ALIST.
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118 ALIST is a list of conses or objects. Each element (or the element's car,
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119 if it is a cons) is compared with KEY by evaluating (TEST (car elt) KEY).
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120 If that is non-nil, the element matches;
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121 then `assoc-default' returns the element's cdr, if it is a cons,
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122 or DEFAULT if the element is not a cons.
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123
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124 If no element matches, the value is nil.
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125 If TEST is omitted or nil, `equal' is used."
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126 (let (found (tail alist) value)
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127 (while (and tail (not found))
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128 (let ((elt (car tail)))
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129 (when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key)
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130 (setq found t value (if (consp elt) (cdr elt) default))))
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131 (setq tail (cdr tail)))
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132 value))
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133
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134 (defun assoc-ignore-case (key alist)
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135 "Like `assoc', but ignores differences in case and text representation.
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136 KEY must be a string. Upper-case and lower-case letters are treated as equal."
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137 (let (element)
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138 (while (and alist (not element))
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139 (if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil t))
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140 (setq element (car alist)))
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141 (setq alist (cdr alist)))
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142 element))
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143
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144 (defun assoc-ignore-representation (key alist)
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145 "Like `assoc', but ignores differences in text representation.
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146 KEY must be a string."
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147 (let (element)
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148 (while (and alist (not element))
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149 (if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil))
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150 (setq element (car alist)))
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151 (setq alist (cdr alist)))
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152 element))
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153
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154 (defun member-ignore-case (elt list)
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155 "Like `member', but ignores differences in case and text representation.
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156 ELT must be a string. Upper-case and lower-case letters are treated as equal."
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157 (while (and list (not (eq t (compare-strings elt 0 nil (car list) 0 nil t))))
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158 (setq list (cdr list)))
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159 list)
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160
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161
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428
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162 ;;;; Keymap support.
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163 ;; XEmacs: removed to keymap.el
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164
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165 ;;;; The global keymap tree.
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166
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167 ;;; global-map, esc-map, and ctl-x-map have their values set up in
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168 ;;; keymap.c; we just give them docstrings here.
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169
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170 ;;;; Event manipulation functions.
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171
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172 ;; XEmacs: This stuff is done in C Code.
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173
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1333
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174 ;;;; Obsolescent names for functions generally appear elsewhere, in
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175 ;;;; obsolete.el or in the files they are related do. Many very old
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176 ;;;; obsolete stuff has been removed entirely (e.g. anything with `dot' in
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177 ;;;; place of `point').
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178
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179 ; alternate names (not obsolete)
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180 (if (not (fboundp 'mod)) (define-function 'mod '%))
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181 (define-function 'move-marker 'set-marker)
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182 (define-function 'beep 'ding) ; preserve lingual purity
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183 (define-function 'indent-to-column 'indent-to)
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184 (define-function 'backward-delete-char 'delete-backward-char)
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185 (define-function 'search-forward-regexp (symbol-function 're-search-forward))
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186 (define-function 'search-backward-regexp (symbol-function 're-search-backward))
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187 (define-function 'remove-directory 'delete-directory)
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188 (define-function 'set-match-data 'store-match-data)
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189 (define-function 'send-string-to-terminal 'external-debugging-output)
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428
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190
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191 ;; XEmacs:
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192 (defun local-variable-if-set-p (sym buffer)
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193 "Return t if SYM would be local to BUFFER after it is set.
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194 A nil value for BUFFER is *not* the same as (current-buffer), but
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195 can be used to determine whether `make-variable-buffer-local' has been
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196 called on SYM."
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197 (local-variable-p sym buffer t))
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198
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199
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200 ;;;; Hook manipulation functions.
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201
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202 ;; (defconst run-hooks 'run-hooks ...)
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203
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204 (defun make-local-hook (hook)
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205 "Make the hook HOOK local to the current buffer.
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206 The return value is HOOK.
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207
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208 You never need to call this function now that `add-hook' does it for you
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209 if its LOCAL argument is non-nil.
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210
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211 When a hook is local, its local and global values
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212 work in concert: running the hook actually runs all the hook
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213 functions listed in *either* the local value *or* the global value
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214 of the hook variable.
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215
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216 This function works by making `t' a member of the buffer-local value,
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217 which acts as a flag to run the hook functions in the default value as
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218 well. This works for all normal hooks, but does not work for most
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219 non-normal hooks yet. We will be changing the callers of non-normal
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220 hooks so that they can handle localness; this has to be done one by
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221 one.
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222
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223 This function does nothing if HOOK is already local in the current
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224 buffer.
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225
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226 Do not use `make-local-variable' to make a hook variable buffer-local."
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428
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227 (if (local-variable-p hook (current-buffer)) ; XEmacs
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228 nil
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229 (or (boundp hook) (set hook nil))
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230 (make-local-variable hook)
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231 (set hook (list t)))
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232 hook)
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428
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233
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234 (defun add-hook (hook function &optional append local)
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235 "Add to the value of HOOK the function FUNCTION.
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236 FUNCTION is not added if already present.
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237 FUNCTION is added (if necessary) at the beginning of the hook list
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238 unless the optional argument APPEND is non-nil, in which case
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239 FUNCTION is added at the end.
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240
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241 The optional fourth argument, LOCAL, if non-nil, says to modify
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242 the hook's buffer-local value rather than its default value.
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243 This makes the hook buffer-local if needed.
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428
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244 To make a hook variable buffer-local, always use
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245 `make-local-hook', not `make-local-variable'.
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246
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247 HOOK should be a symbol, and FUNCTION may be any valid function. If
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248 HOOK is void, it is first set to nil. If HOOK's value is a single
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442
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249 function, it is changed to a list of functions.
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250
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251 You can remove this hook yourself using `remove-hook'.
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252
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253 See also `add-one-shot-hook'."
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428
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254 (or (boundp hook) (set hook nil))
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255 (or (default-boundp hook) (set-default hook nil))
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1333
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256 (if local (unless (local-variable-if-set-p hook (current-buffer)) ; XEmacs
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257 (make-local-hook hook))
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258 ;; Detect the case where make-local-variable was used on a hook
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259 ;; and do what we used to do.
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260 (unless (and (consp (symbol-value hook)) (memq t (symbol-value hook)))
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261 (setq local t)))
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262 (let ((hook-value (if local (symbol-value hook) (default-value hook))))
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263 ;; If the hook value is a single function, turn it into a list.
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264 (when (or (not (listp hook-value)) (eq (car hook-value) 'lambda))
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265 (setq hook-value (list hook-value)))
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266 ;; Do the actual addition if necessary
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267 (unless (member function hook-value)
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268 (setq hook-value
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269 (if append
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270 (append hook-value (list function))
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271 (cons function hook-value))))
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272 ;; Set the actual variable
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273 (if local (set hook hook-value) (set-default hook hook-value))))
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428
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274
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275 (defun remove-hook (hook function &optional local)
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276 "Remove from the value of HOOK the function FUNCTION.
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277 HOOK should be a symbol, and FUNCTION may be any valid function. If
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278 FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
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279 list of hooks to run in HOOK, then nothing is done. See `add-hook'.
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280
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281 The optional third argument, LOCAL, if non-nil, says to modify
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282 the hook's buffer-local value rather than its default value.
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283 This makes the hook buffer-local if needed.
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428
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284 To make a hook variable buffer-local, always use
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285 `make-local-hook', not `make-local-variable'."
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286 (or (boundp hook) (set hook nil))
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287 (or (default-boundp hook) (set-default hook nil))
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288 (if local (unless (local-variable-if-set-p hook (current-buffer)) ; XEmacs
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289 (make-local-hook hook))
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290 ;; Detect the case where make-local-variable was used on a hook
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291 ;; and do what we used to do.
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292 (unless (and (consp (symbol-value hook)) (memq t (symbol-value hook)))
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293 (setq local t)))
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294 (let ((hook-value (if local (symbol-value hook) (default-value hook))))
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295 ;; Remove the function, for both the list and the non-list cases.
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296 ;; XEmacs: add hook-test, for handling one-shot hooks.
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297 (flet ((hook-test
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298 (fn hel)
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299 (or (equal fn hel)
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300 (and (symbolp hel)
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301 (equal fn
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302 (get hel 'one-shot-hook-fun))))))
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303 (if (or (not (listp hook-value)) (eq (car hook-value) 'lambda))
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304 (if (equal hook-value function) (setq hook-value nil))
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305 (setq hook-value (delete* function (copy-sequence hook-value)
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306 :test 'hook-test)))
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307 ;; If the function is on the global hook, we need to shadow it locally
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308 ;;(when (and local (member* function (default-value hook)
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309 ;; :test 'hook-test)
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310 ;; (not (member* (cons 'not function) hook-value
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311 ;; :test 'hook-test)))
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312 ;; (push (cons 'not function) hook-value))
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313 ;; Set the actual variable
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314 (if local (set hook hook-value) (set-default hook hook-value)))))
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442
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315
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316 ;; XEmacs addition
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317 ;; #### we need a coherent scheme for indicating compatibility info,
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318 ;; so that it can be programmatically retrieved.
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319 (defun add-local-hook (hook function &optional append)
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320 "Add to the local value of HOOK the function FUNCTION.
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321 You don't need this any more. It's equivalent to specifying the LOCAL
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322 argument to `add-hook'."
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442
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323 (add-hook hook function append t))
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324
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325 ;; XEmacs addition
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326 (defun remove-local-hook (hook function)
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327 "Remove from the local value of HOOK the function FUNCTION.
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328 You don't need this any more. It's equivalent to specifying the LOCAL
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329 argument to `remove-hook'."
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330 (remove-hook hook function t))
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442
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331
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332 (defun add-one-shot-hook (hook function &optional append local)
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333 "Add to the value of HOOK the one-shot function FUNCTION.
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334 FUNCTION will automatically be removed from the hook the first time
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335 after it runs (whether to completion or to an error).
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336 FUNCTION is not added if already present.
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337 FUNCTION is added (if necessary) at the beginning of the hook list
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338 unless the optional argument APPEND is non-nil, in which case
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339 FUNCTION is added at the end.
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340
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341 HOOK should be a symbol, and FUNCTION may be any valid function. If
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342 HOOK is void, it is first set to nil. If HOOK's value is a single
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343 function, it is changed to a list of functions.
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344
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345 You can remove this hook yourself using `remove-hook'.
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346
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1333
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347 See also `add-hook'."
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442
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348 (let ((sym (gensym)))
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349 (fset sym `(lambda (&rest args)
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350 (unwind-protect
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351 (apply ',function args)
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352 (remove-hook ',hook ',sym ',local))))
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353 (put sym 'one-shot-hook-fun function)
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354 (add-hook hook sym append local)))
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355
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356 (defun add-local-one-shot-hook (hook function &optional append)
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357 "Add to the local value of HOOK the one-shot function FUNCTION.
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1333
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358 You don't need this any more. It's equivalent to specifying the LOCAL
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359 argument to `add-one-shot-hook'."
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442
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360 (add-one-shot-hook hook function append t))
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|
428
|
361
|
|
878
|
362 (defun add-to-list (list-var element &optional append)
|
|
428
|
363 "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet.
|
|
|
364 The test for presence of ELEMENT is done with `equal'.
|
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878
|
365 If ELEMENT is added, it is added at the beginning of the list,
|
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|
366 unless the optional argument APPEND is non-nil, in which case
|
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|
367 ELEMENT is added at the end.
|
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368
|
|
428
|
369 If you want to use `add-to-list' on a variable that is not defined
|
|
|
370 until a certain package is loaded, you should put the call to `add-to-list'
|
|
|
371 into a hook function that will be run only after loading the package.
|
|
|
372 `eval-after-load' provides one way to do this. In some cases
|
|
|
373 other hooks, such as major mode hooks, can do the job."
|
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878
|
374 (if (member element (symbol-value list-var))
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375 (symbol-value list-var)
|
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|
376 (set list-var
|
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377 (if append
|
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|
378 (append (symbol-value list-var) (list element))
|
|
|
379 (cons element (symbol-value list-var))))))
|
|
428
|
380
|
|
1333
|
381 ;; END SYNCHED WITH FSF 21.2
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|
382
|
|
428
|
383 ;; XEmacs additions
|
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|
384 ;; called by Fkill_buffer()
|
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385 (defvar kill-buffer-hook nil
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|
386 "Function or functions to be called when a buffer is killed.
|
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|
387 The value of this variable may be buffer-local.
|
|
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388 The buffer about to be killed is current when this hook is run.")
|
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389
|
|
|
390 ;; in C in FSFmacs
|
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|
391 (defvar kill-emacs-hook nil
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|
392 "Function or functions to be called when `kill-emacs' is called,
|
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|
393 just before emacs is actually killed.")
|
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394
|
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|
395 ;; not obsolete.
|
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396 ;; #### These are a bad idea, because the CL RPLACA and RPLACD
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397 ;; return the cons cell, not the new CAR/CDR. -hniksic
|
|
|
398 ;; The proper definition would be:
|
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|
399 ;; (defun rplaca (conscell newcar)
|
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|
400 ;; (setcar conscell newcar)
|
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|
401 ;; conscell)
|
|
|
402 ;; ...and analogously for RPLACD.
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|
403 (define-function 'rplaca 'setcar)
|
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|
404 (define-function 'rplacd 'setcdr)
|
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405
|
|
|
406 (defun copy-symbol (symbol &optional copy-properties)
|
|
|
407 "Return a new uninterned symbol with the same name as SYMBOL.
|
|
|
408 If COPY-PROPERTIES is non-nil, the new symbol will have a copy of
|
|
|
409 SYMBOL's value, function, and property lists."
|
|
|
410 (let ((new (make-symbol (symbol-name symbol))))
|
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411 (when copy-properties
|
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|
412 ;; This will not copy SYMBOL's chain of forwarding objects, but
|
|
|
413 ;; I think that's OK. Callers should not expect such magic to
|
|
|
414 ;; keep working in the copy in the first place.
|
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|
415 (and (boundp symbol)
|
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|
416 (set new (symbol-value symbol)))
|
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417 (and (fboundp symbol)
|
|
|
418 (fset new (symbol-function symbol)))
|
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|
419 (setplist new (copy-list (symbol-plist symbol))))
|
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|
420 new))
|
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|
421
|
|
442
|
422 (defun set-symbol-value-in-buffer (sym val buffer)
|
|
|
423 "Set the value of SYM to VAL in BUFFER. Useful with buffer-local variables.
|
|
|
424 If SYM has a buffer-local value in BUFFER, or will have one if set, this
|
|
|
425 function allows you to set the local value.
|
|
|
426
|
|
|
427 NOTE: At some point, this will be moved into C and will be very fast."
|
|
|
428 (with-current-buffer buffer
|
|
|
429 (set sym val)))
|
|
444
|
430
|
|
1333
|
431
|
|
|
432 ;; BEGIN SYNCHED WITH FSF 21.2
|
|
|
433
|
|
|
434 ;; #### #### #### AAaargh! Must be in C, because it is used insanely
|
|
|
435 ;; early in the bootstrap process.
|
|
|
436 ;(defun split-path (path)
|
|
|
437 ; "Explode a search path into a list of strings.
|
|
|
438 ;The path components are separated with the characters specified
|
|
|
439 ;with `path-separator'."
|
|
|
440 ; (while (or (not stringp path-separator)
|
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|
441 ; (/= (length path-separator) 1))
|
|
|
442 ; (setq path-separator (signal 'error (list "\
|
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|
443 ;`path-separator' should be set to a single-character string"
|
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|
444 ; path-separator))))
|
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|
445 ; (split-string-by-char path (aref separator 0)))
|
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|
446
|
|
|
447 (defmacro with-current-buffer (buffer &rest body)
|
|
|
448 "Temporarily make BUFFER the current buffer and execute the forms in BODY.
|
|
|
449 The value returned is the value of the last form in BODY.
|
|
|
450 See also `with-temp-buffer'."
|
|
|
451 `(save-current-buffer
|
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|
452 (set-buffer ,buffer)
|
|
|
453 ,@body))
|
|
|
454
|
|
|
455 (defmacro with-temp-file (filename &rest forms)
|
|
|
456 "Create a new buffer, evaluate FORMS there, and write the buffer to FILENAME.
|
|
|
457 The value of the last form in FORMS is returned, like `progn'.
|
|
|
458 See also `with-temp-buffer'."
|
|
|
459 (let ((temp-file (make-symbol "temp-file"))
|
|
|
460 (temp-buffer (make-symbol "temp-buffer")))
|
|
|
461 `(let ((,temp-file ,filename)
|
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|
462 (,temp-buffer
|
|
|
463 (get-buffer-create (generate-new-buffer-name " *temp file*"))))
|
|
|
464 (unwind-protect
|
|
|
465 (prog1
|
|
|
466 (with-current-buffer ,temp-buffer
|
|
|
467 ,@forms)
|
|
|
468 (with-current-buffer ,temp-buffer
|
|
|
469 (widen)
|
|
|
470 (write-region (point-min) (point-max) ,temp-file nil 0)))
|
|
|
471 (and (buffer-name ,temp-buffer)
|
|
|
472 (kill-buffer ,temp-buffer))))))
|
|
|
473
|
|
|
474 ;; FSF compatibility
|
|
|
475 (defmacro with-temp-message (message &rest body)
|
|
|
476 "Display MESSAGE temporarily while BODY is evaluated.
|
|
|
477 The original message is restored to the echo area after BODY has finished.
|
|
|
478 The value returned is the value of the last form in BODY.
|
|
|
479 If MESSAGE is nil, the echo area and message log buffer are unchanged.
|
|
|
480 Use a MESSAGE of \"\" to temporarily clear the echo area.
|
|
428
|
481
|
|
1333
|
482 Note that this function exists for FSF compatibility purposes. A better way
|
|
|
483 under XEmacs is to give the message a particular label (see `display-message');
|
|
|
484 then, the old message is automatically restored when you clear your message
|
|
|
485 with `clear-message'."
|
|
|
486 ;; FSF additional doc string from 21.2:
|
|
|
487 ;; MESSAGE is written to the message log buffer if `message-log-max' is non-nil.
|
|
|
488 (let ((current-message (make-symbol "current-message"))
|
|
|
489 (temp-message (make-symbol "with-temp-message")))
|
|
|
490 `(let ((,temp-message ,message)
|
|
|
491 (,current-message))
|
|
|
492 (unwind-protect
|
|
|
493 (progn
|
|
|
494 (when ,temp-message
|
|
|
495 (setq ,current-message (current-message))
|
|
|
496 (message "%s" ,temp-message))
|
|
|
497 ,@body)
|
|
|
498 (and ,temp-message ,current-message
|
|
|
499 (message "%s" ,current-message))))))
|
|
|
500
|
|
|
501 (defmacro with-temp-buffer (&rest forms)
|
|
|
502 "Create a temporary buffer, and evaluate FORMS there like `progn'.
|
|
|
503 See also `with-temp-file' and `with-output-to-string'."
|
|
|
504 (let ((temp-buffer (make-symbol "temp-buffer")))
|
|
|
505 `(let ((,temp-buffer
|
|
|
506 (get-buffer-create (generate-new-buffer-name " *temp*"))))
|
|
|
507 (unwind-protect
|
|
|
508 (with-current-buffer ,temp-buffer
|
|
|
509 ,@forms)
|
|
|
510 (and (buffer-name ,temp-buffer)
|
|
|
511 (kill-buffer ,temp-buffer))))))
|
|
|
512
|
|
|
513 (defmacro with-output-to-string (&rest body)
|
|
|
514 "Execute BODY, return the text it sent to `standard-output', as a string."
|
|
|
515 `(let ((standard-output
|
|
|
516 (get-buffer-create (generate-new-buffer-name " *string-output*"))))
|
|
|
517 (let ((standard-output standard-output))
|
|
|
518 ,@body)
|
|
|
519 (with-current-buffer standard-output
|
|
|
520 (prog1
|
|
|
521 (buffer-string)
|
|
|
522 (kill-buffer nil)))))
|
|
|
523
|
|
|
524 ;; FSF 21.2.
|
|
|
525
|
|
|
526 ; (defmacro combine-after-change-calls (&rest body)
|
|
|
527 ; "Execute BODY, but don't call the after-change functions till the end.
|
|
|
528 ; If BODY makes changes in the buffer, they are recorded
|
|
|
529 ; and the functions on `after-change-functions' are called several times
|
|
|
530 ; when BODY is finished.
|
|
|
531 ; The return value is the value of the last form in BODY.
|
|
|
532
|
|
|
533 ; If `before-change-functions' is non-nil, then calls to the after-change
|
|
|
534 ; functions can't be deferred, so in that case this macro has no effect.
|
|
|
535
|
|
|
536 ; Do not alter `after-change-functions' or `before-change-functions'
|
|
|
537 ; in BODY."
|
|
|
538 ; `(unwind-protect
|
|
|
539 ; (let ((combine-after-change-calls t))
|
|
|
540 ; . ,body)
|
|
|
541 ; (combine-after-change-execute)))
|
|
801
|
542
|
|
1333
|
543 (defmacro with-syntax-table (table &rest body)
|
|
|
544 "Evaluate BODY with syntax table of current buffer set to a copy of TABLE.
|
|
|
545 The syntax table of the current buffer is saved, BODY is evaluated, and the
|
|
|
546 saved table is restored, even in case of an abnormal exit.
|
|
|
547 Value is what BODY returns."
|
|
|
548 (let ((old-table (make-symbol "table"))
|
|
|
549 (old-buffer (make-symbol "buffer")))
|
|
|
550 `(let ((,old-table (syntax-table))
|
|
|
551 (,old-buffer (current-buffer)))
|
|
|
552 (unwind-protect
|
|
|
553 (progn
|
|
|
554 (set-syntax-table (copy-syntax-table ,table))
|
|
|
555 ,@body)
|
|
|
556 (save-current-buffer
|
|
|
557 (set-buffer ,old-buffer)
|
|
|
558 (set-syntax-table ,old-table))))))
|
|
|
559
|
|
|
560 (put 'with-syntax-table 'lisp-indent-function 1)
|
|
|
561 (put 'with-syntax-table 'edebug-form-spec '(form body))
|
|
|
562
|
|
|
563
|
|
|
564 ;; Moved from mule-coding.el.
|
|
|
565 (defmacro with-string-as-buffer-contents (str &rest body)
|
|
|
566 "With the contents of the current buffer being STR, run BODY.
|
|
|
567 Returns the new contents of the buffer, as modified by BODY.
|
|
|
568 The original current buffer is restored afterwards."
|
|
|
569 `(with-temp-buffer
|
|
|
570 (insert ,str)
|
|
|
571 ,@body
|
|
|
572 (buffer-string)))
|
|
|
573
|
|
|
574
|
|
|
575 (defmacro save-match-data (&rest body)
|
|
|
576 "Execute BODY forms, restoring the global value of the match data."
|
|
|
577 (let ((original (make-symbol "match-data")))
|
|
|
578 (list 'let (list (list original '(match-data)))
|
|
|
579 (list 'unwind-protect
|
|
|
580 (cons 'progn body)
|
|
|
581 (list 'store-match-data original)))))
|
|
|
582
|
|
|
583
|
|
|
584 (defun match-string (num &optional string)
|
|
|
585 "Return string of text matched by last search.
|
|
|
586 NUM specifies which parenthesized expression in the last regexp.
|
|
|
587 Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
|
|
|
588 Zero means the entire text matched by the whole regexp or whole string.
|
|
|
589 STRING should be given if the last search was by `string-match' on STRING."
|
|
|
590 (if (match-beginning num)
|
|
|
591 (if string
|
|
|
592 (substring string (match-beginning num) (match-end num))
|
|
|
593 (buffer-substring (match-beginning num) (match-end num)))))
|
|
801
|
594
|
|
1333
|
595 (defun match-string-no-properties (num &optional string)
|
|
|
596 "Return string of text matched by last search, without text properties.
|
|
|
597 NUM specifies which parenthesized expression in the last regexp.
|
|
|
598 Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
|
|
|
599 Zero means the entire text matched by the whole regexp or whole string.
|
|
|
600 STRING should be given if the last search was by `string-match' on STRING."
|
|
|
601 (if (match-beginning num)
|
|
|
602 (if string
|
|
|
603 (let ((result
|
|
|
604 (substring string (match-beginning num) (match-end num))))
|
|
|
605 (set-text-properties 0 (length result) nil result)
|
|
|
606 result)
|
|
|
607 (buffer-substring-no-properties (match-beginning num)
|
|
|
608 (match-end num)))))
|
|
|
609
|
|
|
610 (defun split-string (string &optional separators)
|
|
|
611 "Splits STRING into substrings where there are matches for SEPARATORS.
|
|
|
612 Each match for SEPARATORS is a splitting point.
|
|
|
613 The substrings between the splitting points are made into a list
|
|
|
614 which is returned.
|
|
|
615 If SEPARATORS is absent, it defaults to \"[ \\f\\t\\n\\r\\v]+\".
|
|
|
616
|
|
|
617 If there is match for SEPARATORS at the beginning of STRING, we do not
|
|
|
618 include a null substring for that. Likewise, if there is a match
|
|
|
619 at the end of STRING, we don't include a null substring for that.
|
|
|
620
|
|
|
621 Modifies the match data; use `save-match-data' if necessary."
|
|
|
622 (let ((rexp (or separators "[ \f\t\n\r\v]+"))
|
|
|
623 (start 0)
|
|
|
624 notfirst
|
|
|
625 (list nil))
|
|
|
626 (while (and (string-match rexp string
|
|
|
627 (if (and notfirst
|
|
|
628 (= start (match-beginning 0))
|
|
|
629 (< start (length string)))
|
|
|
630 (1+ start) start))
|
|
|
631 (< (match-beginning 0) (length string)))
|
|
|
632 (setq notfirst t)
|
|
|
633 (or (eq (match-beginning 0) 0)
|
|
|
634 (and (eq (match-beginning 0) (match-end 0))
|
|
|
635 (eq (match-beginning 0) start))
|
|
|
636 (setq list
|
|
|
637 (cons (substring string start (match-beginning 0))
|
|
|
638 list)))
|
|
|
639 (setq start (match-end 0)))
|
|
|
640 (or (eq start (length string))
|
|
|
641 (setq list
|
|
|
642 (cons (substring string start)
|
|
|
643 list)))
|
|
|
644 (nreverse list)))
|
|
|
645
|
|
|
646 (defun subst-char-in-string (fromchar tochar string &optional inplace)
|
|
|
647 "Replace FROMCHAR with TOCHAR in STRING each time it occurs.
|
|
|
648 Unless optional argument INPLACE is non-nil, return a new string."
|
|
|
649 (let ((i (length string))
|
|
|
650 (newstr (if inplace string (copy-sequence string))))
|
|
|
651 (while (> i 0)
|
|
|
652 (setq i (1- i))
|
|
|
653 (if (eq (aref newstr i) fromchar)
|
|
|
654 (aset newstr i tochar)))
|
|
|
655 newstr))
|
|
|
656
|
|
|
657
|
|
|
658 ;; XEmacs addition:
|
|
428
|
659 (defun replace-in-string (str regexp newtext &optional literal)
|
|
|
660 "Replace all matches in STR for REGEXP with NEWTEXT string,
|
|
|
661 and returns the new string.
|
|
|
662 Optional LITERAL non-nil means do a literal replacement.
|
|
442
|
663 Otherwise treat `\\' in NEWTEXT as special:
|
|
|
664 `\\&' in NEWTEXT means substitute original matched text.
|
|
|
665 `\\N' means substitute what matched the Nth `\\(...\\)'.
|
|
|
666 If Nth parens didn't match, substitute nothing.
|
|
|
667 `\\\\' means insert one `\\'.
|
|
|
668 `\\u' means upcase the next character.
|
|
|
669 `\\l' means downcase the next character.
|
|
|
670 `\\U' means begin upcasing all following characters.
|
|
|
671 `\\L' means begin downcasing all following characters.
|
|
|
672 `\\E' means terminate the effect of any `\\U' or `\\L'."
|
|
428
|
673 (check-argument-type 'stringp str)
|
|
|
674 (check-argument-type 'stringp newtext)
|
|
442
|
675 (if (> (length str) 50)
|
|
924
|
676 (let ((cfs case-fold-search))
|
|
|
677 (with-temp-buffer
|
|
|
678 (setq case-fold-search cfs)
|
|
|
679 (insert str)
|
|
|
680 (goto-char 1)
|
|
442
|
681 (while (re-search-forward regexp nil t)
|
|
|
682 (replace-match newtext t literal))
|
|
924
|
683 (buffer-string)))
|
|
|
684 (let ((start 0) newstr)
|
|
|
685 (while (string-match regexp str start)
|
|
|
686 (setq newstr (replace-match newtext t literal str)
|
|
|
687 start (+ (match-end 0) (- (length newstr) (length str)))
|
|
|
688 str newstr))
|
|
|
689 str)))
|
|
428
|
690
|
|
1333
|
691 (defun replace-regexp-in-string (regexp rep string &optional
|
|
|
692 fixedcase literal subexp start)
|
|
|
693 "Replace all matches for REGEXP with REP in STRING.
|
|
|
694
|
|
|
695 Return a new string containing the replacements.
|
|
|
696
|
|
|
697 Optional arguments FIXEDCASE, LITERAL and SUBEXP are like the
|
|
|
698 arguments with the same names of function `replace-match'. If START
|
|
|
699 is non-nil, start replacements at that index in STRING.
|
|
428
|
700
|
|
1333
|
701 REP is either a string used as the NEWTEXT arg of `replace-match' or a
|
|
|
702 function. If it is a function it is applied to each match to generate
|
|
|
703 the replacement passed to `replace-match'; the match-data at this
|
|
|
704 point are such that match 0 is the function's argument.
|
|
428
|
705
|
|
1333
|
706 To replace only the first match (if any), make REGEXP match up to \\'
|
|
|
707 and replace a sub-expression, e.g.
|
|
|
708 (replace-regexp-in-string \"\\(foo\\).*\\'\" \"bar\" \" foo foo\" nil nil 1)
|
|
|
709 => \" bar foo\"
|
|
|
710 "
|
|
428
|
711
|
|
1333
|
712 ;; To avoid excessive consing from multiple matches in long strings,
|
|
|
713 ;; don't just call `replace-match' continually. Walk down the
|
|
|
714 ;; string looking for matches of REGEXP and building up a (reversed)
|
|
|
715 ;; list MATCHES. This comprises segments of STRING which weren't
|
|
|
716 ;; matched interspersed with replacements for segments that were.
|
|
|
717 ;; [For a `large' number of replacments it's more efficient to
|
|
|
718 ;; operate in a temporary buffer; we can't tell from the function's
|
|
|
719 ;; args whether to choose the buffer-based implementation, though it
|
|
|
720 ;; might be reasonable to do so for long enough STRING.]
|
|
|
721 (let ((l (length string))
|
|
|
722 (start (or start 0))
|
|
|
723 matches str mb me)
|
|
|
724 (save-match-data
|
|
|
725 (while (and (< start l) (string-match regexp string start))
|
|
|
726 (setq mb (match-beginning 0)
|
|
|
727 me (match-end 0))
|
|
|
728 ;; If we matched the empty string, make sure we advance by one char
|
|
|
729 (when (= me mb) (setq me (min l (1+ mb))))
|
|
|
730 ;; Generate a replacement for the matched substring.
|
|
|
731 ;; Operate only on the substring to minimize string consing.
|
|
|
732 ;; Set up match data for the substring for replacement;
|
|
|
733 ;; presumably this is likely to be faster than munging the
|
|
|
734 ;; match data directly in Lisp.
|
|
|
735 (string-match regexp (setq str (substring string mb me)))
|
|
|
736 (setq matches
|
|
|
737 (cons (replace-match (if (stringp rep)
|
|
|
738 rep
|
|
|
739 (funcall rep (match-string 0 str)))
|
|
|
740 fixedcase literal str subexp)
|
|
|
741 (cons (substring string start mb) ; unmatched prefix
|
|
|
742 matches)))
|
|
|
743 (setq start me))
|
|
|
744 ;; Reconstruct a string from the pieces.
|
|
|
745 (setq matches (cons (substring string start l) matches)) ; leftover
|
|
|
746 (apply #'concat (nreverse matches)))))
|
|
428
|
747
|
|
1333
|
748 ;; END SYNCHED WITH FSF 21.2
|
|
|
749
|
|
|
750
|
|
|
751 ;;; Basic string functions
|
|
883
|
752
|
|
1333
|
753 ;; XEmacs
|
|
|
754 (defun string-equal-ignore-case (str1 str2)
|
|
|
755 "Return t if two strings have identical contents, ignoring case differences.
|
|
|
756 Case is not significant. Text properties and extents are ignored.
|
|
|
757 Symbols are also allowed; their print names are used instead.
|
|
428
|
758
|
|
1333
|
759 See also `equalp'."
|
|
|
760 (if (symbolp str1)
|
|
|
761 (setq str1 (symbol-name str1)))
|
|
|
762 (if (symbolp str2)
|
|
|
763 (setq str2 (symbol-name str2)))
|
|
|
764 (eq t (compare-strings str1 nil nil str2 nil nil t)))
|
|
428
|
765
|
|
|
766 (defun insert-face (string face)
|
|
|
767 "Insert STRING and highlight with FACE. Return the extent created."
|
|
|
768 (let ((p (point)) ext)
|
|
|
769 (insert string)
|
|
|
770 (setq ext (make-extent p (point)))
|
|
|
771 (set-extent-face ext face)
|
|
|
772 ext))
|
|
|
773
|
|
|
774 ;; not obsolete.
|
|
|
775 (define-function 'string= 'string-equal)
|
|
|
776 (define-function 'string< 'string-lessp)
|
|
|
777 (define-function 'int-to-string 'number-to-string)
|
|
|
778 (define-function 'string-to-int 'string-to-number)
|
|
|
779
|
|
|
780 ;; These two names are a bit awkward, as they conflict with the normal
|
|
|
781 ;; foo-to-bar naming scheme, but CLtL2 has them, so they stay.
|
|
|
782 (define-function 'char-int 'char-to-int)
|
|
|
783 (define-function 'int-char 'int-to-char)
|
|
|
784
|
|
771
|
785 (defun string-width (string)
|
|
|
786 "Return number of columns STRING occupies when displayed.
|
|
|
787 With international (Mule) support, uses the charset-columns attribute of
|
|
|
788 the characters in STRING, which may not accurately represent the actual
|
|
|
789 display width when using a window system. With no international support,
|
|
|
790 simply returns the length of the string."
|
|
|
791 (if (featurep 'mule)
|
|
|
792 (let ((col 0)
|
|
|
793 (len (length string))
|
|
|
794 (i 0))
|
|
772
|
795 (with-fboundp '(charset-width char-charset)
|
|
|
796 (while (< i len)
|
|
|
797 (setq col (+ col (charset-width (char-charset (aref string i)))))
|
|
|
798 (setq i (1+ i))))
|
|
771
|
799 col)
|
|
|
800 (length string)))
|
|
|
801
|
|
777
|
802 (defun char-width (character)
|
|
|
803 "Return number of columns a CHARACTER occupies when displayed."
|
|
|
804 (if (featurep 'mule)
|
|
|
805 (with-fboundp '(charset-width char-charset)
|
|
|
806 (charset-width (char-charset character)))
|
|
|
807 1))
|
|
|
808
|
|
|
809 ;; The following several functions are useful in GNU Emacs 20 because
|
|
|
810 ;; of the multibyte "characters" the internal representation of which
|
|
|
811 ;; leaks into Lisp. In XEmacs/Mule they are trivial and unnecessary.
|
|
|
812 ;; We provide them for compatibility reasons solely.
|
|
|
813
|
|
|
814 (defun string-to-sequence (string type)
|
|
|
815 "Convert STRING to a sequence of TYPE which contains characters in STRING.
|
|
|
816 TYPE should be `list' or `vector'."
|
|
|
817 (ecase type
|
|
|
818 (list
|
|
|
819 (mapcar #'identity string))
|
|
|
820 (vector
|
|
|
821 (mapvector #'identity string))))
|
|
|
822
|
|
|
823 (defun string-to-list (string)
|
|
|
824 "Return a list of characters in STRING."
|
|
|
825 (mapcar #'identity string))
|
|
|
826
|
|
|
827 (defun string-to-vector (string)
|
|
|
828 "Return a vector of characters in STRING."
|
|
|
829 (mapvector #'identity string))
|
|
|
830
|
|
|
831 (defun store-substring (string idx obj)
|
|
|
832 "Embed OBJ (string or character) at index IDX of STRING."
|
|
|
833 (let* ((str (cond ((stringp obj) obj)
|
|
|
834 ((characterp obj) (char-to-string obj))
|
|
|
835 (t (error
|
|
|
836 "Invalid argument (should be string or character): %s"
|
|
|
837 obj))))
|
|
|
838 (string-len (length string))
|
|
|
839 (len (length str))
|
|
|
840 (i 0))
|
|
|
841 (while (and (< i len) (< idx string-len))
|
|
|
842 (aset string idx (aref str i))
|
|
|
843 (setq idx (1+ idx) i (1+ i)))
|
|
|
844 string))
|
|
|
845
|
|
851
|
846 ;; From FSF 21.1; ELLIPSES is XEmacs addition.
|
|
|
847
|
|
|
848 (defun truncate-string-to-width (str end-column &optional start-column padding
|
|
1333
|
849 ellipses)
|
|
777
|
850 "Truncate string STR to end at column END-COLUMN.
|
|
814
|
851 The optional 3rd arg START-COLUMN, if non-nil, specifies
|
|
777
|
852 the starting column; that means to return the characters occupying
|
|
|
853 columns START-COLUMN ... END-COLUMN of STR.
|
|
|
854
|
|
814
|
855 The optional 4th arg PADDING, if non-nil, specifies a padding character
|
|
777
|
856 to add at the end of the result if STR doesn't reach column END-COLUMN,
|
|
|
857 or if END-COLUMN comes in the middle of a character in STR.
|
|
|
858 PADDING is also added at the beginning of the result
|
|
|
859 if column START-COLUMN appears in the middle of a character in STR.
|
|
|
860
|
|
|
861 If PADDING is nil, no padding is added in these cases, so
|
|
851
|
862 the resulting string may be narrower than END-COLUMN.
|
|
|
863
|
|
|
864 BUG: Currently assumes that the padding character is of width one. You
|
|
|
865 will get weird results if not.
|
|
|
866
|
|
|
867 If ELLIPSES is non-nil, add ellipses (specified by ELLIPSES if a string,
|
|
|
868 else `...') if STR extends past END-COLUMN. The ellipses will be added in
|
|
|
869 such a way that the total string occupies no more than END-COLUMN columns
|
|
|
870 -- i.e. if the string goes past END-COLUMN, it will be truncated somewhere
|
|
|
871 short of END-COLUMN so that, with the ellipses added (and padding, if the
|
|
|
872 proper place to truncate the string would be in the middle of a character),
|
|
|
873 the string occupies exactly END-COLUMN columns."
|
|
777
|
874 (or start-column
|
|
|
875 (setq start-column 0))
|
|
814
|
876 (let ((len (length str))
|
|
|
877 (idx 0)
|
|
|
878 (column 0)
|
|
|
879 (head-padding "") (tail-padding "")
|
|
|
880 ch last-column last-idx from-idx)
|
|
851
|
881
|
|
|
882 ;; find the index of START-COLUMN; bail out if end of string reached.
|
|
814
|
883 (condition-case nil
|
|
|
884 (while (< column start-column)
|
|
|
885 (setq ch (aref str idx)
|
|
|
886 column (+ column (char-width ch))
|
|
|
887 idx (1+ idx)))
|
|
|
888 (args-out-of-range (setq idx len)))
|
|
|
889 (if (< column start-column)
|
|
851
|
890 ;; if string ends before START-COLUMN, return either a blank string
|
|
|
891 ;; or a string entirely padded.
|
|
|
892 (if padding (make-string (- end-column start-column) padding) "")
|
|
814
|
893 (if (and padding (> column start-column))
|
|
|
894 (setq head-padding (make-string (- column start-column) padding)))
|
|
|
895 (setq from-idx idx)
|
|
851
|
896 ;; If END-COLUMN is before START-COLUMN, then bail out.
|
|
814
|
897 (if (< end-column column)
|
|
851
|
898 (setq idx from-idx ellipses "")
|
|
|
899
|
|
|
900 ;; handle ELLIPSES
|
|
|
901 (cond ((null ellipses) (setq ellipses ""))
|
|
|
902 ((if (<= (string-width str) end-column)
|
|
|
903 ;; string fits, no ellipses
|
|
|
904 (setq ellipses "")))
|
|
|
905 (t
|
|
|
906 ;; else, insert default value and ...
|
|
|
907 (or (stringp ellipses) (setq ellipses "..."))
|
|
|
908 ;; ... take away the width of the ellipses from the
|
|
|
909 ;; destination. do all computations with new, shorter
|
|
|
910 ;; width. the padding computed will get us exactly up to
|
|
|
911 ;; the shorted width, which is right -- it just gets added
|
|
|
912 ;; to the right of the ellipses.
|
|
924
|
913 (setq end-column (- end-column (string-width ellipses)))))
|
|
851
|
914
|
|
|
915 ;; find the index of END-COLUMN; bail out if end of string reached.
|
|
814
|
916 (condition-case nil
|
|
|
917 (while (< column end-column)
|
|
|
918 (setq last-column column
|
|
|
919 last-idx idx
|
|
|
920 ch (aref str idx)
|
|
|
921 column (+ column (char-width ch))
|
|
|
922 idx (1+ idx)))
|
|
|
923 (args-out-of-range (setq idx len)))
|
|
851
|
924 ;; if we went too far (stopped in middle of character), back up.
|
|
814
|
925 (if (> column end-column)
|
|
|
926 (setq column last-column idx last-idx))
|
|
851
|
927 ;; compute remaining padding
|
|
814
|
928 (if (and padding (< column end-column))
|
|
|
929 (setq tail-padding (make-string (- end-column column) padding))))
|
|
851
|
930 ;; get substring ...
|
|
814
|
931 (setq str (substring str from-idx idx))
|
|
851
|
932 ;; and construct result
|
|
814
|
933 (if padding
|
|
851
|
934 (concat head-padding str tail-padding ellipses)
|
|
|
935 (concat str ellipses)))))
|
|
801
|
936
|
|
428
|
937
|
|
|
938 ;; alist/plist functions
|
|
|
939 (defun plist-to-alist (plist)
|
|
|
940 "Convert property list PLIST into the equivalent association-list form.
|
|
|
941 The alist is returned. This converts from
|
|
|
942
|
|
|
943 \(a 1 b 2 c 3)
|
|
|
944
|
|
|
945 into
|
|
|
946
|
|
|
947 \((a . 1) (b . 2) (c . 3))
|
|
|
948
|
|
|
949 The original plist is not modified. See also `destructive-plist-to-alist'."
|
|
|
950 (let (alist)
|
|
|
951 (while plist
|
|
|
952 (setq alist (cons (cons (car plist) (cadr plist)) alist))
|
|
|
953 (setq plist (cddr plist)))
|
|
|
954 (nreverse alist)))
|
|
|
955
|
|
783
|
956 (defun map-plist (_mp_fun _mp_plist)
|
|
|
957 "Map _MP_FUN (a function of two args) over each key/value pair in _MP_PLIST.
|
|
|
958 Return a list of the results."
|
|
|
959 (let (_mp_result)
|
|
|
960 (while _mp_plist
|
|
|
961 (push (funcall _mp_fun (car _mp_plist) (cadr _mp_plist)) _mp_result)
|
|
|
962 (setq _mp_plist (cddr _mp_plist)))
|
|
|
963 (nreverse _mp_result)))
|
|
|
964
|
|
428
|
965 (defun destructive-plist-to-alist (plist)
|
|
|
966 "Convert property list PLIST into the equivalent association-list form.
|
|
|
967 The alist is returned. This converts from
|
|
|
968
|
|
|
969 \(a 1 b 2 c 3)
|
|
|
970
|
|
|
971 into
|
|
|
972
|
|
|
973 \((a . 1) (b . 2) (c . 3))
|
|
|
974
|
|
|
975 The original plist is destroyed in the process of constructing the alist.
|
|
|
976 See also `plist-to-alist'."
|
|
|
977 (let ((head plist)
|
|
|
978 next)
|
|
|
979 (while plist
|
|
|
980 ;; remember the next plist pair.
|
|
|
981 (setq next (cddr plist))
|
|
|
982 ;; make the cons holding the property value into the alist element.
|
|
|
983 (setcdr (cdr plist) (cadr plist))
|
|
|
984 (setcar (cdr plist) (car plist))
|
|
|
985 ;; reattach into alist form.
|
|
|
986 (setcar plist (cdr plist))
|
|
|
987 (setcdr plist next)
|
|
|
988 (setq plist next))
|
|
|
989 head))
|
|
|
990
|
|
|
991 (defun alist-to-plist (alist)
|
|
|
992 "Convert association list ALIST into the equivalent property-list form.
|
|
|
993 The plist is returned. This converts from
|
|
|
994
|
|
|
995 \((a . 1) (b . 2) (c . 3))
|
|
|
996
|
|
|
997 into
|
|
|
998
|
|
|
999 \(a 1 b 2 c 3)
|
|
|
1000
|
|
|
1001 The original alist is not modified. See also `destructive-alist-to-plist'."
|
|
|
1002 (let (plist)
|
|
|
1003 (while alist
|
|
|
1004 (let ((el (car alist)))
|
|
|
1005 (setq plist (cons (cdr el) (cons (car el) plist))))
|
|
|
1006 (setq alist (cdr alist)))
|
|
|
1007 (nreverse plist)))
|
|
|
1008
|
|
|
1009 ;; getf, remf in cl*.el.
|
|
|
1010
|
|
444
|
1011 (defmacro putf (plist property value)
|
|
|
1012 "Add property PROPERTY to plist PLIST with value VALUE.
|
|
|
1013 Analogous to (setq PLIST (plist-put PLIST PROPERTY VALUE))."
|
|
|
1014 `(setq ,plist (plist-put ,plist ,property ,value)))
|
|
428
|
1015
|
|
444
|
1016 (defmacro laxputf (lax-plist property value)
|
|
|
1017 "Add property PROPERTY to lax plist LAX-PLIST with value VALUE.
|
|
|
1018 Analogous to (setq LAX-PLIST (lax-plist-put LAX-PLIST PROPERTY VALUE))."
|
|
|
1019 `(setq ,lax-plist (lax-plist-put ,lax-plist ,property ,value)))
|
|
428
|
1020
|
|
444
|
1021 (defmacro laxremf (lax-plist property)
|
|
|
1022 "Remove property PROPERTY from lax plist LAX-PLIST.
|
|
|
1023 Analogous to (setq LAX-PLIST (lax-plist-remprop LAX-PLIST PROPERTY))."
|
|
|
1024 `(setq ,lax-plist (lax-plist-remprop ,lax-plist ,property)))
|
|
428
|
1025
|
|
|
1026 ;;; Error functions
|
|
|
1027
|
|
442
|
1028 (defun error (datum &rest args)
|
|
|
1029 "Signal a non-continuable error.
|
|
|
1030 DATUM should normally be an error symbol, i.e. a symbol defined using
|
|
|
1031 `define-error'. ARGS will be made into a list, and DATUM and ARGS passed
|
|
|
1032 as the two arguments to `signal', the most basic error handling function.
|
|
|
1033
|
|
428
|
1034 This error is not continuable: you cannot continue execution after the
|
|
442
|
1035 error using the debugger `r' command. See also `cerror'.
|
|
|
1036
|
|
|
1037 The correct semantics of ARGS varies from error to error, but for most
|
|
|
1038 errors that need to be generated in Lisp code, the first argument
|
|
|
1039 should be a string describing the *context* of the error (i.e. the
|
|
|
1040 exact operation being performed and what went wrong), and the remaining
|
|
|
1041 arguments or \"frobs\" (most often, there is one) specify the
|
|
|
1042 offending object(s) and/or provide additional details such as the exact
|
|
|
1043 error when a file error occurred, e.g.:
|
|
|
1044
|
|
|
1045 -- the buffer in which an editing error occurred.
|
|
|
1046 -- an invalid value that was encountered. (In such cases, the string
|
|
|
1047 should describe the purpose or \"semantics\" of the value [e.g. if the
|
|
|
1048 value is an argument to a function, the name of the argument; if the value
|
|
|
1049 is the value corresponding to a keyword, the name of the keyword; if the
|
|
|
1050 value is supposed to be a list length, say this and say what the purpose
|
|
|
1051 of the list is; etc.] as well as specifying why the value is invalid, if
|
|
|
1052 that's not self-evident.)
|
|
|
1053 -- the file in which an error occurred. (In such cases, there should be a
|
|
|
1054 second frob, probably a string, specifying the exact error that occurred.
|
|
|
1055 This does not occur in the string that precedes the first frob, because
|
|
|
1056 that frob describes the exact operation that was happening.
|
|
|
1057
|
|
|
1058 For historical compatibility, DATUM can also be a string. In this case,
|
|
|
1059 DATUM and ARGS are passed together as the arguments to `format', and then
|
|
|
1060 an error is signalled using the error symbol `error' and formatted string.
|
|
|
1061 Although this usage of `error' is very common, it is deprecated because it
|
|
|
1062 totally defeats the purpose of having structured errors. There is now
|
|
|
1063 a rich set of defined errors you can use:
|
|
|
1064
|
|
563
|
1065 quit
|
|
|
1066
|
|
442
|
1067 error
|
|
|
1068 invalid-argument
|
|
563
|
1069 syntax-error
|
|
|
1070 invalid-read-syntax
|
|
|
1071 invalid-regexp
|
|
|
1072 structure-formation-error
|
|
|
1073 list-formation-error
|
|
|
1074 malformed-list
|
|
|
1075 malformed-property-list
|
|
|
1076 circular-list
|
|
|
1077 circular-property-list
|
|
|
1078 invalid-function
|
|
|
1079 no-catch
|
|
|
1080 undefined-keystroke-sequence
|
|
|
1081 invalid-constant
|
|
442
|
1082 wrong-type-argument
|
|
|
1083 args-out-of-range
|
|
|
1084 wrong-number-of-arguments
|
|
428
|
1085
|
|
442
|
1086 invalid-state
|
|
|
1087 void-function
|
|
|
1088 cyclic-function-indirection
|
|
|
1089 void-variable
|
|
|
1090 cyclic-variable-indirection
|
|
509
|
1091 invalid-byte-code
|
|
563
|
1092 stack-overflow
|
|
|
1093 out-of-memory
|
|
|
1094 invalid-key-binding
|
|
|
1095 internal-error
|
|
442
|
1096
|
|
|
1097 invalid-operation
|
|
|
1098 invalid-change
|
|
|
1099 setting-constant
|
|
563
|
1100 protected-field
|
|
442
|
1101 editing-error
|
|
|
1102 beginning-of-buffer
|
|
|
1103 end-of-buffer
|
|
|
1104 buffer-read-only
|
|
|
1105 io-error
|
|
509
|
1106 file-error
|
|
|
1107 file-already-exists
|
|
|
1108 file-locked
|
|
|
1109 file-supersession
|
|
563
|
1110 end-of-file
|
|
|
1111 process-error
|
|
|
1112 network-error
|
|
509
|
1113 tooltalk-error
|
|
563
|
1114 gui-error
|
|
|
1115 dialog-box-error
|
|
|
1116 sound-error
|
|
|
1117 conversion-error
|
|
|
1118 text-conversion-error
|
|
|
1119 image-conversion-error
|
|
|
1120 base64-conversion-error
|
|
|
1121 selection-conversion-error
|
|
442
|
1122 arith-error
|
|
|
1123 range-error
|
|
|
1124 domain-error
|
|
|
1125 singularity-error
|
|
|
1126 overflow-error
|
|
|
1127 underflow-error
|
|
509
|
1128 search-failed
|
|
563
|
1129 printing-unreadable-object
|
|
|
1130 unimplemented
|
|
509
|
1131
|
|
563
|
1132 Note the semantic differences between some of the more common errors:
|
|
442
|
1133
|
|
563
|
1134 -- `invalid-argument' is for all cases where a bad value is encountered.
|
|
|
1135 -- `invalid-constant' is for arguments where only a specific set of values
|
|
|
1136 is allowed.
|
|
|
1137 -- `syntax-error' is when complex structures (parsed strings, lists,
|
|
|
1138 and the like) are badly formed. If the problem is just a single bad
|
|
|
1139 value inside the structure, you should probably be using something else,
|
|
|
1140 e.g. `invalid-constant', `wrong-type-argument', or `invalid-argument'.
|
|
442
|
1141 -- `invalid-state' means that some settings have been changed in such a way
|
|
|
1142 that their current state is unallowable. More and more, code is being
|
|
|
1143 written more carefully, and catches the error when the settings are being
|
|
|
1144 changed, rather than afterwards. This leads us to the next error:
|
|
|
1145 -- `invalid-change' means that an attempt is being made to change some settings
|
|
|
1146 into an invalid state. `invalid-change' is a type of `invalid-operation'.
|
|
|
1147 -- `invalid-operation' refers to all cases where code is trying to do something
|
|
563
|
1148 that's disallowed, or when an error occurred during an operation. (These
|
|
|
1149 two concepts are merged because there's no clear distinction between them.)
|
|
|
1150 -- `io-error' refers to errors involving interaction with any external
|
|
|
1151 components (files, other programs, the operating system, etc).
|
|
442
|
1152
|
|
|
1153 See also `cerror', `signal', and `signal-error'."
|
|
|
1154 (while t (apply
|
|
|
1155 'cerror datum args)))
|
|
|
1156
|
|
|
1157 (defun cerror (datum &rest args)
|
|
428
|
1158 "Like `error' but signals a continuable error."
|
|
442
|
1159 (cond ((stringp datum)
|
|
|
1160 (signal 'error (list (apply 'format datum args))))
|
|
|
1161 ((defined-error-p datum)
|
|
|
1162 (signal datum args))
|
|
|
1163 (t
|
|
|
1164 (error 'invalid-argument "datum not string or error symbol" datum))))
|
|
428
|
1165
|
|
|
1166 (defmacro check-argument-type (predicate argument)
|
|
|
1167 "Check that ARGUMENT satisfies PREDICATE.
|
|
442
|
1168 This is a macro, and ARGUMENT is not evaluated. If ARGUMENT is an lvalue,
|
|
|
1169 this function signals a continuable `wrong-type-argument' error until the
|
|
|
1170 returned value satisfies PREDICATE, and assigns the returned value
|
|
|
1171 to ARGUMENT. Otherwise, this function signals a non-continuable
|
|
|
1172 `wrong-type-argument' error if the returned value does not satisfy PREDICATE."
|
|
|
1173 (if (symbolp argument)
|
|
|
1174 `(if (not (,(eval predicate) ,argument))
|
|
|
1175 (setq ,argument
|
|
|
1176 (wrong-type-argument ,predicate ,argument)))
|
|
|
1177 `(if (not (,(eval predicate) ,argument))
|
|
|
1178 (signal-error 'wrong-type-argument (list ,predicate ,argument)))))
|
|
428
|
1179
|
|
872
|
1180 (defun args-out-of-range (value min max)
|
|
|
1181 "Signal an error until the correct in-range value is given by the user.
|
|
|
1182 This function loops, signalling a continuable `args-out-of-range' error
|
|
|
1183 with VALUE, MIN and MAX as the data associated with the error and then
|
|
|
1184 checking the returned value to make sure it's not outside the given
|
|
|
1185 boundaries \(nil for either means no boundary on that side). At that
|
|
|
1186 point, the gotten value is returned."
|
|
|
1187 (loop
|
|
|
1188 for newval = (signal 'args-out-of-range (list value min max))
|
|
|
1189 do (setq value newval)
|
|
|
1190 finally return value
|
|
|
1191 while (not (argument-in-range-p value min max))))
|
|
|
1192
|
|
|
1193 (defun argument-in-range-p (argument min max)
|
|
|
1194 "Return true if ARGUMENT is within the range of [MIN, MAX].
|
|
|
1195 This includes boundaries. nil for either value means no limit on that side."
|
|
|
1196 (and (or (not min) (<= min argument))
|
|
|
1197 (or (not max) (<= argument max))))
|
|
|
1198
|
|
|
1199 (defmacro check-argument-range (argument min max)
|
|
|
1200 "Check that ARGUMENT is within the range [MIN, MAX].
|
|
|
1201 This is a macro, and ARGUMENT is not evaluated. If ARGUMENT is an lvalue,
|
|
|
1202 this function signals a continuable `args-out-of-range' error until the
|
|
|
1203 returned value is within range, and assigns the returned value
|
|
|
1204 to ARGUMENT. Otherwise, this function signals a non-continuable
|
|
|
1205 `args-out-of-range' error if the returned value is out of range."
|
|
|
1206 (if (symbolp argument)
|
|
|
1207 `(if (not (argument-in-range-p ,argument ,min ,max))
|
|
924
|
1208 (setq ,argument
|
|
|
1209 (args-out-of-range ,argument ,min ,max)))
|
|
872
|
1210 (let ((newsym (gensym)))
|
|
|
1211 `(let ((,newsym ,argument))
|
|
924
|
1212 (if (not (argument-in-range-p ,newsym ,min ,max))
|
|
|
1213 (signal-error 'args-out-of-range ,newsym ,min ,max))))))
|
|
872
|
1214
|
|
428
|
1215 (defun signal-error (error-symbol data)
|
|
|
1216 "Signal a non-continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
1217 An error symbol is a symbol defined using `define-error'.
|
|
|
1218 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
1219 If the signal is handled, DATA is made available to the handler.
|
|
|
1220 See also `signal', and the functions to handle errors: `condition-case'
|
|
|
1221 and `call-with-condition-handler'."
|
|
|
1222 (while t
|
|
|
1223 (signal error-symbol data)))
|
|
|
1224
|
|
|
1225 (defun define-error (error-sym doc-string &optional inherits-from)
|
|
|
1226 "Define a new error, denoted by ERROR-SYM.
|
|
|
1227 DOC-STRING is an informative message explaining the error, and will be
|
|
|
1228 printed out when an unhandled error occurs.
|
|
|
1229 ERROR-SYM is a sub-error of INHERITS-FROM (which defaults to `error').
|
|
|
1230
|
|
|
1231 \[`define-error' internally works by putting on ERROR-SYM an `error-message'
|
|
|
1232 property whose value is DOC-STRING, and an `error-conditions' property
|
|
|
1233 that is a list of ERROR-SYM followed by each of its super-errors, up
|
|
|
1234 to and including `error'. You will sometimes see code that sets this up
|
|
|
1235 directly rather than calling `define-error', but you should *not* do this
|
|
|
1236 yourself.]"
|
|
|
1237 (check-argument-type 'symbolp error-sym)
|
|
|
1238 (check-argument-type 'stringp doc-string)
|
|
|
1239 (put error-sym 'error-message doc-string)
|
|
|
1240 (or inherits-from (setq inherits-from 'error))
|
|
|
1241 (let ((conds (get inherits-from 'error-conditions)))
|
|
|
1242 (or conds (signal-error 'error (list "Not an error symbol" error-sym)))
|
|
|
1243 (put error-sym 'error-conditions (cons error-sym conds))))
|
|
|
1244
|
|
442
|
1245 (defun defined-error-p (sym)
|
|
|
1246 "Returns non-nil if SYM names a currently-defined error."
|
|
|
1247 (and (symbolp sym) (not (null (get sym 'error-conditions)))))
|
|
|
1248
|
|
793
|
1249 (defun backtrace-in-condition-handler-eliminating-handler (handler-arg-name)
|
|
|
1250 "Return a backtrace inside of a condition handler, eliminating the handler.
|
|
|
1251 This is for use in the condition handler inside of call-with-condition-handler,
|
|
|
1252 when written like this:
|
|
|
1253
|
|
|
1254 \(call-with-condition-handler
|
|
|
1255 #'(lambda (__some_weird_arg__)
|
|
|
1256 do the handling ...)
|
|
|
1257 #'(lambda ()
|
|
|
1258 do the stuff that might cause an error))
|
|
|
1259
|
|
|
1260 Pass in the name (a symbol) of the argument used in the lambda function
|
|
|
1261 that specifies the handler, and make sure the argument name is unique, and
|
|
|
1262 this function generates a backtrace and strips off the part above where the
|
|
|
1263 error occurred (i.e. the handler itself)."
|
|
|
1264 (let* ((bt (with-output-to-string (backtrace nil t)))
|
|
|
1265 (bt (save-match-data
|
|
|
1266 ;; Try to eliminate the part of the backtrace
|
|
|
1267 ;; above where the error occurred.
|
|
|
1268 (if (string-match
|
|
|
1269 (concat "bind (\\(?:.* \\)?" (symbol-name handler-arg-name)
|
|
|
1270 "\\(?:.* \\)?)[ \t\n]*\\(?:(lambda \\|#<compiled-function \\)("
|
|
|
1271 (symbol-name handler-arg-name)
|
|
|
1272 ").*\n\\(\\(?:.\\|\n\\)*\\)$")
|
|
|
1273 bt) (match-string 1 bt) bt))))
|
|
|
1274 bt))
|
|
|
1275
|
|
|
1276 (put 'with-trapping-errors 'lisp-indent-function 0)
|
|
|
1277 (defmacro with-trapping-errors (&rest keys-body)
|
|
|
1278 "Trap errors in BODY, outputting a warning and a backtrace.
|
|
|
1279 Usage looks like
|
|
|
1280
|
|
|
1281 \(with-trapping-errors
|
|
|
1282 [:operation OPERATION]
|
|
|
1283 [:error-form ERROR-FORM]
|
|
|
1284 [:no-backtrace NO-BACKTRACE]
|
|
|
1285 [:class CLASS]
|
|
|
1286 [:level LEVEL]
|
|
|
1287 [:resignal RESIGNAL]
|
|
|
1288 BODY)
|
|
|
1289
|
|
|
1290 Return value without error is whatever BODY returns. With error, return
|
|
|
1291 result of ERROR-FORM (which will be evaluated only when the error actually
|
|
|
1292 occurs), which defaults to nil. OPERATION is given in the warning message.
|
|
|
1293 CLASS and LEVEL are the warning class and level (default to class
|
|
|
1294 `general', level `warning'). If NO-BACKTRACE is given, no backtrace is
|
|
|
1295 displayed. If RESIGNAL is given, the error is resignaled after the warning
|
|
|
1296 is displayed and the ERROR-FORM is executed."
|
|
|
1297 (let ((operation "unknown")
|
|
|
1298 (error-form nil)
|
|
|
1299 (no-backtrace nil)
|
|
|
1300 (class ''general)
|
|
|
1301 (level ''warning)
|
|
|
1302 (resignal nil))
|
|
|
1303 (let* ((keys '(operation error-form no-backtrace class level resignal))
|
|
|
1304 (keys-with-colon
|
|
|
1305 (mapcar #'(lambda (sym)
|
|
|
1306 (intern (concat ":" (symbol-name sym)))) keys)))
|
|
|
1307 (while (memq (car keys-body) keys-with-colon)
|
|
|
1308 (let* ((key-with-colon (pop keys-body))
|
|
|
1309 (key (intern (substring (symbol-name key-with-colon) 1))))
|
|
|
1310 (set key (pop keys-body)))))
|
|
|
1311 `(condition-case ,(if resignal '__cte_cc_var__ nil)
|
|
|
1312 (call-with-condition-handler
|
|
|
1313 #'(lambda (__call_trapping_errors_arg__)
|
|
|
1314 (let ((errstr (error-message-string
|
|
|
1315 __call_trapping_errors_arg__)))
|
|
|
1316 ,(if no-backtrace
|
|
|
1317 `(lwarn ,class ,level
|
|
|
1318 (if (warning-level-<
|
|
|
1319 ,level
|
|
|
1320 display-warning-minimum-level)
|
|
|
1321 "Error in %s: %s"
|
|
|
1322 "Error in %s:\n%s\n")
|
|
|
1323 ,operation errstr)
|
|
|
1324 `(lwarn ,class ,level
|
|
|
1325 "Error in %s: %s\n\nBacktrace follows:\n\n%s"
|
|
|
1326 ,operation errstr
|
|
|
1327 (backtrace-in-condition-handler-eliminating-handler
|
|
|
1328 '__call_trapping_errors_arg__)))))
|
|
|
1329 #'(lambda ()
|
|
|
1330 (progn ,@keys-body)))
|
|
|
1331 (error
|
|
|
1332 ,error-form
|
|
|
1333 ,@(if resignal '((signal (car __cte_cc_var__) (cdr __cte_cc_var__)))))
|
|
|
1334 )))
|
|
|
1335
|
|
428
|
1336 ;;;; Miscellanea.
|
|
|
1337
|
|
|
1338 ;; This is now in C.
|
|
444
|
1339 ;(defun buffer-substring-no-properties (start end)
|
|
|
1340 ; "Return the text from START to END, without text properties, as a string."
|
|
|
1341 ; (let ((string (buffer-substring start end)))
|
|
428
|
1342 ; (set-text-properties 0 (length string) nil string)
|
|
|
1343 ; string))
|
|
|
1344
|
|
|
1345 (defun get-buffer-window-list (&optional buffer minibuf frame)
|
|
|
1346 "Return windows currently displaying BUFFER, or nil if none.
|
|
|
1347 BUFFER defaults to the current buffer.
|
|
|
1348 See `walk-windows' for the meaning of MINIBUF and FRAME."
|
|
|
1349 (cond ((null buffer)
|
|
|
1350 (setq buffer (current-buffer)))
|
|
|
1351 ((not (bufferp buffer))
|
|
|
1352 (setq buffer (get-buffer buffer))))
|
|
|
1353 (let (windows)
|
|
|
1354 (walk-windows (lambda (window)
|
|
|
1355 (if (eq (window-buffer window) buffer)
|
|
|
1356 (push window windows)))
|
|
|
1357 minibuf frame)
|
|
|
1358 windows))
|
|
|
1359
|
|
|
1360 (defun ignore (&rest ignore)
|
|
|
1361 "Do nothing and return nil.
|
|
|
1362 This function accepts any number of arguments, but ignores them."
|
|
|
1363 (interactive)
|
|
|
1364 nil)
|
|
|
1365
|
|
883
|
1366 ;; defined in lisp/bindings.el in GNU Emacs.
|
|
|
1367 (defmacro bound-and-true-p (var)
|
|
|
1368 "Return the value of symbol VAR if it is bound, else nil."
|
|
|
1369 `(and (boundp (quote ,var)) ,var))
|
|
|
1370
|
|
|
1371 ;; `propertize' is a builtin in GNU Emacs 21.
|
|
|
1372 (defun propertize (string &rest properties)
|
|
|
1373 "Return a copy of STRING with text properties added.
|
|
|
1374 First argument is the string to copy.
|
|
|
1375 Remaining arguments form a sequence of PROPERTY VALUE pairs for text
|
|
|
1376 properties to add to the result."
|
|
|
1377 (let ((str (copy-sequence string)))
|
|
|
1378 (add-text-properties 0 (length str)
|
|
|
1379 properties
|
|
|
1380 str)
|
|
|
1381 str))
|
|
|
1382
|
|
|
1383 ;; `delete-and-extract-region' is a builtin in GNU Emacs 21.
|
|
|
1384 (defun delete-and-extract-region (start end)
|
|
|
1385 "Delete the text between START and END and return it."
|
|
|
1386 (let ((region (buffer-substring start end)))
|
|
|
1387 (delete-region start end)
|
|
|
1388 region))
|
|
|
1389
|
|
428
|
1390 (define-function 'eval-in-buffer 'with-current-buffer)
|
|
|
1391 (make-obsolete 'eval-in-buffer 'with-current-buffer)
|
|
|
1392
|
|
|
1393 ;;; The real defn is in abbrev.el but some early callers
|
|
|
1394 ;;; (eg lisp-mode-abbrev-table) want this before abbrev.el is loaded...
|
|
|
1395
|
|
|
1396 (if (not (fboundp 'define-abbrev-table))
|
|
|
1397 (progn
|
|
|
1398 (setq abbrev-table-name-list '())
|
|
924
|
1399 (fset 'define-abbrev-table
|
|
|
1400 (function (lambda (name defs)
|
|
|
1401 ;; These are fixed-up when abbrev.el loads.
|
|
|
1402 (setq abbrev-table-name-list
|
|
|
1403 (cons (cons name defs)
|
|
|
1404 abbrev-table-name-list)))))))
|
|
428
|
1405
|
|
|
1406 ;;; `functionp' has been moved into C.
|
|
|
1407
|
|
|
1408 ;;(defun functionp (object)
|
|
|
1409 ;; "Non-nil if OBJECT can be called as a function."
|
|
|
1410 ;; (or (and (symbolp object) (fboundp object))
|
|
|
1411 ;; (subrp object)
|
|
|
1412 ;; (compiled-function-p object)
|
|
|
1413 ;; (eq (car-safe object) 'lambda)))
|
|
|
1414
|
|
|
1415 (defun function-interactive (function)
|
|
|
1416 "Return the interactive specification of FUNCTION.
|
|
|
1417 FUNCTION can be any funcallable object.
|
|
|
1418 The specification will be returned as the list of the symbol `interactive'
|
|
|
1419 and the specs.
|
|
|
1420 If FUNCTION is not interactive, nil will be returned."
|
|
|
1421 (setq function (indirect-function function))
|
|
|
1422 (cond ((compiled-function-p function)
|
|
|
1423 (compiled-function-interactive function))
|
|
|
1424 ((subrp function)
|
|
|
1425 (subr-interactive function))
|
|
|
1426 ((eq (car-safe function) 'lambda)
|
|
|
1427 (let ((spec (if (stringp (nth 2 function))
|
|
|
1428 (nth 3 function)
|
|
|
1429 (nth 2 function))))
|
|
|
1430 (and (eq (car-safe spec) 'interactive)
|
|
|
1431 spec)))
|
|
|
1432 (t
|
|
|
1433 (error "Non-funcallable object: %s" function))))
|
|
|
1434
|
|
442
|
1435 (defun function-allows-args (function n)
|
|
|
1436 "Return whether FUNCTION can be called with N arguments."
|
|
|
1437 (and (<= (function-min-args function) n)
|
|
|
1438 (or (null (function-max-args function))
|
|
|
1439 (<= n (function-max-args function)))))
|
|
|
1440
|
|
428
|
1441 ;; This function used to be an alias to `buffer-substring', except
|
|
|
1442 ;; that FSF Emacs 20.4 added a BUFFER argument in an incompatible way.
|
|
|
1443 ;; The new FSF's semantics makes more sense, but we try to support
|
|
|
1444 ;; both for backward compatibility.
|
|
|
1445 (defun buffer-string (&optional buffer old-end old-buffer)
|
|
|
1446 "Return the contents of the current buffer as a string.
|
|
|
1447 If narrowing is in effect, this function returns only the visible part
|
|
|
1448 of the buffer.
|
|
|
1449
|
|
|
1450 If BUFFER is specified, the contents of that buffer are returned.
|
|
|
1451
|
|
|
1452 The arguments OLD-END and OLD-BUFFER are supported for backward
|
|
|
1453 compatibility with pre-21.2 XEmacsen times when arguments to this
|
|
|
1454 function were (buffer-string &optional START END BUFFER)."
|
|
|
1455 (cond
|
|
|
1456 ((or (stringp buffer) (bufferp buffer))
|
|
|
1457 ;; Most definitely the new way.
|
|
|
1458 (buffer-substring nil nil buffer))
|
|
|
1459 ((or (stringp old-buffer) (bufferp old-buffer)
|
|
|
1460 (natnump buffer) (natnump old-end))
|
|
|
1461 ;; Definitely the old way.
|
|
|
1462 (buffer-substring buffer old-end old-buffer))
|
|
|
1463 (t
|
|
|
1464 ;; Probably the old way.
|
|
|
1465 (buffer-substring buffer old-end old-buffer))))
|
|
|
1466
|
|
1333
|
1467 ;; BEGIN SYNC WITH FSF 21.2
|
|
|
1468
|
|
428
|
1469 ;; This was not present before. I think Jamie had some objections
|
|
|
1470 ;; to this, so I'm leaving this undefined for now. --ben
|
|
|
1471
|
|
|
1472 ;;; The objection is this: there is more than one way to load the same file.
|
|
|
1473 ;;; "foo", "foo.elc", "foo.el", and "/some/path/foo.elc" are all different
|
|
|
1474 ;;; ways to load the exact same code. `eval-after-load' is too stupid to
|
|
|
1475 ;;; deal with this sort of thing. If this sort of feature is desired, then
|
|
|
1476 ;;; it should work off of a hook on `provide'. Features are unique and
|
|
|
1477 ;;; the arguments to (load) are not. --Stig
|
|
|
1478
|
|
|
1479 ;; We provide this for FSFmacs compatibility, at least until we devise
|
|
|
1480 ;; something better.
|
|
|
1481
|
|
|
1482 ;;;; Specifying things to do after certain files are loaded.
|
|
|
1483
|
|
|
1484 (defun eval-after-load (file form)
|
|
|
1485 "Arrange that, if FILE is ever loaded, FORM will be run at that time.
|
|
|
1486 This makes or adds to an entry on `after-load-alist'.
|
|
|
1487 If FILE is already loaded, evaluate FORM right now.
|
|
|
1488 It does nothing if FORM is already on the list for FILE.
|
|
1333
|
1489 FILE must match exactly. Normally FILE is the name of a library,
|
|
|
1490 with no directory or extension specified, since that is how `load'
|
|
|
1491 is normally called."
|
|
|
1492 ;; Make sure `load-history' contains the files dumped with Emacs
|
|
|
1493 ;; for the case that FILE is one of the files dumped with Emacs.
|
|
|
1494 (if-fboundp 'load-symbol-file-load-history
|
|
|
1495 (load-symbol-file-load-history))
|
|
428
|
1496 ;; Make sure there is an element for FILE.
|
|
|
1497 (or (assoc file after-load-alist)
|
|
|
1498 (setq after-load-alist (cons (list file) after-load-alist)))
|
|
|
1499 ;; Add FORM to the element if it isn't there.
|
|
|
1500 (let ((elt (assoc file after-load-alist)))
|
|
|
1501 (or (member form (cdr elt))
|
|
|
1502 (progn
|
|
|
1503 (nconc elt (list form))
|
|
|
1504 ;; If the file has been loaded already, run FORM right away.
|
|
|
1505 (and (assoc file load-history)
|
|
|
1506 (eval form)))))
|
|
|
1507 form)
|
|
|
1508 (make-compatible 'eval-after-load "")
|
|
|
1509
|
|
|
1510 (defun eval-next-after-load (file)
|
|
|
1511 "Read the following input sexp, and run it whenever FILE is loaded.
|
|
|
1512 This makes or adds to an entry on `after-load-alist'.
|
|
|
1513 FILE should be the name of a library, with no directory name."
|
|
|
1514 (eval-after-load file (read)))
|
|
|
1515 (make-compatible 'eval-next-after-load "")
|
|
|
1516
|
|
1333
|
1517 ;; END SYNC WITH FSF 21.2
|
|
428
|
1518
|
|
|
1519 ;;; subr.el ends here
|
