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annotate lisp/mule/general-late.el @ 5892:053ef01b71a8

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Import the #'clear-string API from GNU, use it in tls.c src/ChangeLog addition: 2015-04-18 Aidan Kehoe <kehoea@parhasard.net> * sequence.c (Fclear_string): New, API from GNU. Zero a string's contents, making sure the text is not kept around even when the string's data is reallocated because of a changed character length. * sequence.c (syms_of_sequence): Make it available to Lisp. * lisp.h: Make it available to C code. * tls.c (nss_pk11_password): Use it. * tls.c (gnutls_pk11_password): Use it. * tls.c (openssl_password): Use it. tests/ChangeLog addition: 2015-04-18 Aidan Kehoe <kehoea@parhasard.net> * automated/lisp-tests.el: Test #'clear-string, just added. Unfortunately there's no way to be certain from Lisp that the old password data has been erased after realloc; it may be worth adding a test to tests.c, but *we'll be reading memory we shouldn't be*, so that gives me pause.
author Aidan Kehoe <kehoea@parhasard.net>
date Sat, 18 Apr 2015 23:00:14 +0100
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children
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1 ;;; general-late.el --- General Mule code that needs to be run late when
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2 ;; dumping.
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3 ;; Copyright (C) 2006 Free Software Foundation
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4
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5 ;; Author: Aidan Kehoe
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6
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7 ;; This file is part of XEmacs.
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8
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9 ;; XEmacs is free software: you can redistribute it and/or modify it
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10 ;; under the terms of the GNU General Public License as published by the
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11 ;; Free Software Foundation, either version 3 of the License, or (at your
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12 ;; option) any later version.
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14 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 ;; for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>.
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21
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22 ;;; Commentary:
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23
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24 ;;; Code:
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25
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26 ;; The variable is declared in mule-cmds.el; it's initialised here, to give
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27 ;; the language-specific code a chance to create its coding systems.
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28
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29 (setq posix-charset-to-coding-system-hash
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30 (loop
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31 ;; We want both normal and internal coding systems in order
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32 ;; to pick up coding system aliases.
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33 for coding-system in (coding-system-list 'every)
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34 with res = (make-hash-table :test #'equal)
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35 do
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36 (setq coding-system (symbol-name coding-system))
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37 (unless (or (string-match #r"\(-unix\|-mac\|-dos\)$" coding-system)
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38 (string-match #r"^\(internal\|mswindows\)" coding-system))
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39 (puthash
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40 (replace-in-string (downcase coding-system) "[^a-z0-9]" "")
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41 (coding-system-name (intern coding-system)) res))
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42 finally return res)
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43
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44 ;; In a thoughtless act of cultural imperialism, move English, German
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45 ;; and Japanese to the front of language-info-alist to make start-up a
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46 ;; fraction faster for those languages.
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47 language-info-alist
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48 (cons (assoc "Japanese" language-info-alist)
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49 (delete* "Japanese" language-info-alist :test #'equal :key #'car))
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50 language-info-alist
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51 (cons (assoc "German" language-info-alist)
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52 (delete* "German" language-info-alist :test #'equal :key #'car))
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53 language-info-alist
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54 (cons (assoc "English" language-info-alist)
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55 (delete* "English" language-info-alist :test #'equal :key #'car))
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56
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57 ;; Make Installation-string actually reflect the environment at
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58 ;; byte-compile time. (We can't necessarily decode it when version.el
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59 ;; is loaded, since not all the coding systems are available then.)
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60 Installation-string (if-boundp 'Installation-file-coding-system
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61 (decode-coding-string
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62 Installation-string
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63 Installation-file-coding-system)
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64 Installation-string)
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65
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66 ;; This used to be here to convince the byte-compiler to encode the
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67 ;; output file using escape-quoted. This is no longer necessary, but
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68 ;; keeping it here avoids doing the eval-when-compile clause below
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69 ;; twice, which is a significant improvement.
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70 system-type (symbol-value (intern "\u0073ystem-type")))
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71
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72 ;; When this file is being compiled, all the charsets have been loaded, so
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73 ;; we can construct the query-skip-chars-arg string correctly.
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74 (set-unicode-query-skip-chars-args
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75 (eval-when-compile
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76 (when-fboundp 'map-charset-chars
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77 (loop
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78 for charset in (charset-list)
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79 with skip-chars-string = ""
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80 do
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81 (block no-ucs-mapping
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82 (map-charset-chars
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83 #'(lambda (begin end)
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84 (loop
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85 while (and begin (>= end begin))
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86 do
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87 (when (= -1 (char-to-unicode begin))
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88 (return-from no-ucs-mapping))
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89 (setq begin (int-to-char (1+ begin)))))
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90 charset)
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91 (setq skip-chars-string
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92 (concat skip-chars-string
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93 (charset-skip-chars-string charset))))
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94 finally return skip-chars-string)))
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95 unicode-invalid-sequence-regexp-range
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96 (eval-when-compile
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97 (concat (loop
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98 for i from #x80 to #xFF
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99 collect (aref (decode-coding-string (int-char i)
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100 'utf-8) 0)))))
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101
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102 ;; At this point in the dump, all the charsets have been loaded. Now, load
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103 ;; their Unicode mappings.
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104 (if load-unicode-tables-at-dump-time
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105 (let ((data-directory (expand-file-name "etc" source-directory)))
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106 (load-unicode-tables)))
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107
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108 ;;; general-late.el ends here