/usr/share/gEDA/scheme/auto-uref.scm is in geda-gschem 1:1.6.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | ;; gEDA - GPL Electronic Design Automation
;; gschem - gEDA Schematic Capture
;; Copyright (C) 1998-2010 Ales Hvezda
;; Copyright (C) 1998-2010 gEDA Contributors (see ChangeLog for details)
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
(use-modules (ice-9 regex))
(define prefix-list '())
(define (auto-uref attribs)
(define (get-next-uref prefix)
(let ((available-prefix (assoc prefix prefix-list)))
(cond (available-prefix
(assoc-set! prefix-list
(car available-prefix)
(+ (cdr available-prefix) 1))
(cdr available-prefix))
(else ; First time prefix was seen
(set! prefix-list (acons prefix 1 prefix-list))
1))))
;; Total Guile
(define (get-prefix value)
(let ((prefix (string-match "^[A-Z]*" value)))
(if (= 0 (match:end prefix))
#f
(match:substring prefix))))
(for-each
(lambda (attrib)
(let* ((name-value (get-attribute-name-value attrib))
(name (car name-value))
(value (cdr name-value))
(prefix (get-prefix value)))
; If get-prefix fails (returns #f) there is no ? in the string
(if (and prefix (string=? name "refdes"))
(set-attribute-value! attrib (string-append
prefix
(number->string (get-next-uref prefix)))))))
attribs))
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