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428
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1 ;;; config.el --- access configuration parameters
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2
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3 ;; Copyright (C) 1997 Sun Microsystems, Inc.
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4
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5 ;; Author: Martin Buchholz
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6 ;; Keywords: configure
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify
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11 ;; it under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful,
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16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ;; GNU General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the
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22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 ;; Boston, MA 02111-1307, USA.
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24
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25 ;;; Synched up with: not in FSF.
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26
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27 ;;; Commentary:
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28
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29 ;;; Code:
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30
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31
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32 (defvar config-value-file (expand-file-name "config.values" doc-directory)
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33 "File containing configuration parameters and their values.")
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34
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35 (defvar config-value-hash-table nil
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36 "Hash table to store configuration parameters and their values.")
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37
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38 ;;;###autoload
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39 (defun config-value-hash-table ()
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40 "Return hash table of configuration parameters and their values."
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41 (when (null config-value-hash-table)
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42 (setq config-value-hash-table (make-hash-table :size 300))
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43 (save-excursion
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44 (let ((buf (get-buffer-create " *Config*")))
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45 (set-buffer buf)
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46 (erase-buffer)
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47 (insert-file-contents config-value-file)
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48 (goto-char (point-min))
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49 (condition-case nil
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50 (while t
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51 (let* ((key (read buf))
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52 (value (read buf))
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53 (prev (gethash key config-value-hash-table)))
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54 (cond ((null prev)
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55 (puthash key value config-value-hash-table))
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56 ((atom prev)
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57 (puthash key (list prev value) config-value-hash-table))
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58 (t
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59 (nconc prev (list value))))))
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60 (end-of-file nil)))
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61 (kill-buffer " *Config*")))
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62 config-value-hash-table)
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63
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64 ;;;###autoload
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65 (defun config-value (config-symbol)
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66 "Return the value of the configuration parameter CONFIG_SYMBOL."
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67 (gethash config-symbol (config-value-hash-table)))
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68
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69 (provide 'config)
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70 ;;; config.el ends here
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