/usr/share/emacs/site-lisp/edb/db-two-dbs.el is in edb 1.31-3.
This file is owned by root:root, with mode 0o644.
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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 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | ;;; db-two-dbs.el --- part of EDB, the Emacs database
;; Copyright (C) 2004,2005,2006,2007,2008 Thien-Thi Nguyen
;; This file is part of EDB.
;;
;; EDB 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 3, or (at your option) any later
;; version.
;;
;; EDB 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 EDB; see the file COPYING. If not, write to the Free
;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
;; MA 02110-1301, USA.
;;; Commentary:
;; Support for actions on two databases.
;;; Code:
(eval-when-compile (require 'cl))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Process two databases
;;;
;;;###autoload
(defun db-process-two-databases (db1 db2 lone1 lone2 corr &optional orderer)
(db-with-orderer db1
(unless (database-ordered-p db1 orderer)
(db-message "Sorting %S..." (database-print-name db1))
(database-sort db1 orderer))
(unless (database-ordered-p db2 orderer)
(db-message "Sorting %S..." (database-print-name db2))
(database-sort db2 orderer))
;; Perhaps check for identical keys here.
(db-message "Databases are properly ordered")
(let* ((rno1 (edb--1D db1 :nrecords))
(vov1 (edb--1D db1 :vov))
(zix1 0)
(rno2 (edb--1D db2 :nrecords))
(vov2 (edb--1D db2 :vov))
(zix2 0)
(done1 (= 0 rno1))
(done2 (= 0 rno2))
r1 r2 r-order)
(while (not (or done1 done2))
(setq r1 (aref vov1 zix1)
r2 (aref vov2 zix2)
r-order (funcall orderer r1 r2))
(cond ((= -1 r-order)
(funcall lone1 r1)
(incf zix1)
(when (= zix1 rno1) (setq done1 t)))
((= 1 r-order)
(funcall lone2 r2)
(incf zix2)
(when (= zix2 rno2) (setq done2 t)))
((= 0 r-order)
(funcall corr r1 r2)
(incf zix1)
(incf zix2)
(when (= zix1 rno1) (setq done1 t))
(when (= zix2 rno2) (setq done2 t)))
(t
(error "Bad result %s from orderer." r-order))))
(while (not done1)
(funcall lone1 (aref vov1 zix1))
(incf zix1)
(when (= zix1 rno1) (setq done1 t)))
(while (not done2)
(funcall lone2 (aref vov2 zix2))
(incf zix2)
(when (= zix2 rno2) (setq done2 t)))
nil)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Merge
;;;
;; Want to display both records in full and, for each differing field,
;; ask how to set the merged database: from one, from the other, or by
;; entering something particular. It should also be possible to edit
;; the merged record before proceeding to the next one.
;; Should check for the consistency of the two databases. Should permit
;; conversion for one or both databases as part of this procedure.
;;;###autoload
(defun db-merge ()
"Merge two databases chosen with completion among read-in databases."
(interactive)
(let ((avail (mapcar (lambda (db)
(cons (database-print-name db) db))
(edb--1all-known-databases)))
db1 db2 db3 buf1 buf2 buf3)
(cond ((< (length avail) 2)
(error "Less than two read-in databases."))
((= 2 (length avail))
(setq db1 (cdar avail)
db2 (cdadr avail)))
(t
;; Could check that a data display buffer exists.
(setq db1 (assoc (completing-read
"First database to merge? [? for options] "
avail nil t nil)
avail))
(setq avail (delq db1 avail))
(setq db1 (cdr db1))
;; fixme: err if not compatabile.
(setq db2 (cdr (assoc (completing-read
"Second database to merge? [? for options] "
avail nil t nil)
avail)))))
(setq buf1 (car (edb--1D db1 :ddbufs))
buf2 (car (edb--1D db2 :ddbufs)))
(setq db3 (let ((result (edb--copy-v1-monolithic-mess db1)))
(callf2 concat "Copy of " (database-print-name db1))
(edb--1D! result :vov nil) ; hmmm
(edb--1D! result :nrecords 0)
;; Should this go after db-choose-format-file?
(edb--1D! result :file (concat (edb--1D db1 :file) "-COPY"))
(edb--1D! result :ddbufs
(list (db-setup-data-display-buffer
(db-choose-format-file result nil nil)
result
t)))
result)
buf3 (car (edb--1D db3 :ddbufs)))
(setf (database-print-name db3)
(concat "Merge of `" (database-print-name db1)
"' and `" (database-print-name db2) "'"))
(let ((idx1 (with-current-buffer buf1 (edb--S :index)))
(idx2 (with-current-buffer buf2 (edb--S :index))))
(delete-other-windows)
(switch-to-buffer buf1)
(split-window-vertically (/ (window-height) 2))
(other-window 1)
(switch-to-buffer buf2)
(split-window-vertically)
(other-window 1)
(switch-to-buffer buf3)
(set-buffer buf1)
(db-process-two-databases
db1 db2
(lambda (r) (database-add-record r db3))
(lambda (r) (database-add-record r db3))
(lambda (r1 r2)
(database-add-record (db-merge-records r1 r2 db3 buf1 buf2 buf3)
db3)))
(db-in-buffer buf1 (db-jump-to-record idx1))
(db-in-buffer buf2 (db-jump-to-record idx2))
(db-in-buffer buf3 (db-jump-to-record 1))))
(message "Done merging."))
(defun db-merge-records (r1 r2 db buf1 buf2 buf3)
(if (equal r1 r2)
r1
(set-buffer buf1)
(db-display-record r1 t)
(set-buffer buf2)
(db-display-record r2 t)
(set-buffer buf3)
(let* ((nfields (length (database-fieldnames db)))
(r3 (make-vector nfields nil))
(ds1-all (with-current-buffer buf1 (edb--S :displayspecs)))
(ds2-all (with-current-buffer buf2 (edb--S :displayspecs)))
(cffuncs-slice (db-rs-slice db 'edb--1rs-common-form-function))
v1 v2 ds1 ds2 cf fname)
(dotimes (fno nfields)
(setq ds1 (aref ds1-all fno)
ds2 (aref ds2-all fno)
cf (or (aref cffuncs-slice fno) 'identity)
v1 (funcall cf (aref r1 fno))
v2 (funcall cf (aref r2 fno)))
(if (equal v1 v2)
(aset r3 fno v1)
(setq fname (db-fname<-fno fno db))
;; Problem: nil might not be valid in some places.
;; For now, ignore that.
(db-display-record r3 t fno)
;; Does no constraint checking; is this the right thing to do?
;; Help for one-char-question is not entirely satisfactory here.
(aset r3 fno
(cond ((y-or-n-p
(format "Use first value for %s field? [%s] "
fname
(db-callconvert
(edb--1ds-actual->display ds1)
v1
nil nil)))
v1)
((y-or-n-p
(format "Use second value for %s field? [%s] "
fname
(db-callconvert
(edb--1ds-actual->display ds2)
v2
nil nil)))
v2)
(t
(unless (equal (edb--1ds-display->actual ds1)
(edb--1ds-display->actual ds2))
(error "Unequal display->actual functions"))
(db-callconvert
(edb--1ds-display->actual ds1)
(read-from-minibuffer
(format "Enter value for %s field: " fname))
nil nil nil))))))
r3)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Compare
;;;
;;;###autoload
(defun databases-compatible (db1 db2)
"Return t if the database records have the same field names and type,
nil otherwise."
;; Should eventually check types as well.
(let ((rv t)
(fno 0)
(count1 (length (database-recordfieldspecs db1)))
(count2 (length (database-recordfieldspecs db2)))
(types1-slice (db-rs-slice db1 'edb--1rs-type))
(types2-slice (db-rs-slice db2 'edb--1rs-type)))
(when (= count1 count2)
(while (and rv (< fno count1))
(setq rv (eq (aref types1-slice fno)
(aref types2-slice fno)))
(incf fno))
rv)))
(defun database-compare-hack (db1 db2)
;; Check that fieldnames and types are the same.
(unless (databases-compatible db1 db2)
(error "Incompatible databases."))
(let* ((name1 (or (database-print-name db1) "First Database"))
(name2 (or (database-print-name db2) "Second Database"))
(loners1 (get-buffer-create (concat "Loners for " name1)))
(loners2 (get-buffer-create (concat "Loners for " name2)))
(discrep (get-buffer-create (concat "Discrepancies between "
name1 " and " name2))))
(dolist (buf (list loners1 loners2 discrep))
(with-current-buffer buf (erase-buffer)))
(cl-flet ((print-r (r db)
(let ((names (database-fieldnames db)))
(princ "\n")
(dotimes (fno (length (database-fieldnames db)))
(princ (format "%s: %s\n" (aref names fno)
(aref r fno))))))
(print-l1 (r) (db-in-buffer loners1 (print-r r db1)))
(print-l2 (r) (db-in-buffer loners2 (print-r r db2))))
(db-process-two-databases
db1 db2 'print-l1 'print-l2
(lambda (r1 r2)
;; We already know that order-function considers the two
;; records the same; now we need to check whether any of
;; their fields differ and if so, report it.
(unless (equal r1 r2)
(db-in-buffer discrep
(let ((all-rs (edb--1D db1 :elaborated-rfspecs))
fname rs ofunc v1 v2)
(princ "\n")
(dotimes (fno (length (database-fieldnames db1)))
(setq fname (db-fname<-fno fno db1)
ofunc (db-rs-ordfunc (aref all-rs fno))
v1 (aref r1 fno)
v2 (aref r2 fno))
(cond ((equal v1 v2)
(princ (format " %s: %s\n" fname v1)))
((and ofunc (zerop (funcall ofunc v1 v2)))
(princ (format ". %s: %s\n. %s: %s\n"
fname v1 fname v2)))
(t
(princ (format "* %s: %s\n* %s: %s\n"
fname v1 fname v2)))))))))))))
(provide 'db-two-dbs)
;;; db-two-dbs.el ends here
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