142 lines
5.4 KiB
EmacsLisp
142 lines
5.4 KiB
EmacsLisp
;;; ldg-commodities.el --- Helper code for use with the "ledger" command-line tool
|
|
|
|
;; Copyright (C) 2003-2013 John Wiegley (johnw AT gnu DOT org)
|
|
|
|
;; This file is not part of GNU Emacs.
|
|
|
|
;; This 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, or (at your option) any later
|
|
;; version.
|
|
;;
|
|
;; This 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 GNU Emacs; see the file COPYING. If not, write to the
|
|
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
|
;; MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
;; Helper functions to deal with commoditized numbers. A commoditized
|
|
;; number will be a list of value and string where the string contains
|
|
;; the commodity
|
|
|
|
;;; Code:
|
|
|
|
(defcustom ledger-reconcile-default-commodity "$"
|
|
"The default commodity for use in target calculations in ledger reconcile."
|
|
:type 'string
|
|
:group 'ledger-reconcile)
|
|
|
|
(defun ledger-split-commodity-string (str)
|
|
"Split a commoditized string, STR, into two parts.
|
|
Returns a list with (value commodity)."
|
|
(if (> (length str) 0)
|
|
(let ((number-regex (if (assoc "decimal-comma" ledger-environment-alist)
|
|
"-?[1-9][0-9.]*[,]?[0-9]*"
|
|
"-?[1-9][0-9,]*[.]?[0-9]*")))
|
|
(with-temp-buffer
|
|
(insert str)
|
|
(goto-char (point-min))
|
|
(cond
|
|
((re-search-forward "\"\\(.*\\)\"" nil t)
|
|
(let ((com (delete-and-extract-region
|
|
(match-beginning 1)
|
|
(match-end 1))))
|
|
(if (re-search-forward number-regex nil t)
|
|
(list
|
|
(string-to-number
|
|
(ledger-commodity-string-number-decimalize
|
|
(delete-and-extract-region (match-beginning 0) (match-end 0)) :from-user))
|
|
com))))
|
|
((re-search-forward number-regex nil t)
|
|
;; found a number in the current locale, return it in
|
|
;; the car. Anything left over is annotation,
|
|
;; the first thing should be the commodity, separated
|
|
;; by whitespace, return it in the cdr. I can't think of any
|
|
;; counterexamples
|
|
(list
|
|
(string-to-number
|
|
(ledger-commodity-string-number-decimalize
|
|
(delete-and-extract-region (match-beginning 0) (match-end 0)) :from-user))
|
|
(nth 0 (split-string (buffer-substring-no-properties (point-min) (point-max))))))
|
|
((re-search-forward "0" nil t)
|
|
;; couldn't find a decimal number, look for a single 0,
|
|
;; indicating account with zero balance
|
|
(list 0 ledger-reconcile-default-commodity)))))
|
|
;; nothing found, return 0
|
|
(list 0 ledger-reconcile-default-commodity)))
|
|
|
|
(defun ledger-string-balance-to-commoditized-amount (str)
|
|
"Return a commoditized amount (val, 'comm') from STR."
|
|
(let ((fields (split-string str "[\n\r]"))) ; break any balances
|
|
; with multi commodities
|
|
; into a list
|
|
(mapcar #'(lambda (str)
|
|
(ledger-split-commodity-string str))
|
|
fields)))
|
|
|
|
(defun -commodity (c1 c2)
|
|
"Subtract C2 from C1, ensuring their commodities match."
|
|
(if (string= (cadr c1) (cadr c2))
|
|
(list (- (car c1) (car c2)) (cadr c1))
|
|
(error "Can't subtract different commodities %S from %S" c2 c1)))
|
|
|
|
(defun +commodity (c1 c2)
|
|
"Add C1 and C2, ensuring their commodities match."
|
|
(if (string= (cadr c1) (cadr c2))
|
|
(list (+ (car c1) (car c2)) (cadr c1))
|
|
(error "Can't add different commodities, %S to %S" c1 c2)))
|
|
|
|
(defun ledger-commodity-string-number-decimalize (number-string direction)
|
|
"Take NUMBER-STRING and ensure proper decimalization for use by string-to-number and number-to-string.
|
|
|
|
DIRECTION can be :to-user or :from-user. All math calculations
|
|
are done with decimal-period, some users may prefer decimal-comma
|
|
which must be translated both directions."
|
|
(let ((val number-string))
|
|
(if (assoc "decimal-comma" ledger-environment-alist)
|
|
(cond ((eq direction :from-user)
|
|
;; change string to decimal-period
|
|
(while (string-match "," val)
|
|
(setq val (replace-match "." nil nil val)))) ;; switch to period separator
|
|
((eq direction :to-user)
|
|
;; change to decimal-comma
|
|
(while (string-match "\\." val)
|
|
(setq val (replace-match "," nil nil val)))) ;; gets rid of periods
|
|
(t
|
|
(error "ledger-commodity-string-number-decimalize: direction not properly specified %S" direction)))
|
|
(while (string-match "," val)
|
|
(setq val (replace-match "" nil nil val))))
|
|
val))
|
|
|
|
|
|
|
|
(defun ledger-commodity-to-string (c1)
|
|
"Return string representing C1.
|
|
Single character commodities are placed ahead of the value,
|
|
longer ones are after the value."
|
|
(let ((val (ledger-commodity-string-number-decimalize
|
|
(number-to-string (car c1)) :to-user))
|
|
(commodity (cadr c1)))
|
|
(if (> (length commodity) 1)
|
|
(concat val " " commodity)
|
|
(concat commodity " " val))))
|
|
|
|
(defun ledger-read-commodity-string (prompt)
|
|
(let ((str (read-from-minibuffer
|
|
(concat prompt " (" ledger-reconcile-default-commodity "): ")))
|
|
comm)
|
|
(if (> (length str) 0)
|
|
(progn
|
|
(setq comm (ledger-split-commodity-string str))
|
|
(if (cadr comm)
|
|
comm
|
|
(list (car comm) ledger-reconcile-default-commodity))))))
|
|
|
|
(provide 'ldg-commodities)
|
|
|
|
;;; ldg-commodities.el ends here
|