diff options
Diffstat (limited to 'lisp/ledger-commodities.el')
| -rw-r--r-- | lisp/ledger-commodities.el | 147 |
1 files changed, 75 insertions, 72 deletions
diff --git a/lisp/ledger-commodities.el b/lisp/ledger-commodities.el index 48d41979..a2cdf6ac 100644 --- a/lisp/ledger-commodities.el +++ b/lisp/ledger-commodities.el @@ -1,6 +1,6 @@ ;;; ledger-commodities.el --- Helper code for use with the "ledger" command-line tool -;; Copyright (C) 2003-2013 John Wiegley (johnw AT gnu DOT org) +;; Copyright (C) 2003-2014 John Wiegley (johnw AT gnu DOT org) ;; This file is not part of GNU Emacs. @@ -16,8 +16,8 @@ ;; ;; 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. +;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, +;; MA 02110-1301 USA. ;;; Commentary: ;; Helper functions to deal with commoditized numbers. A commoditized @@ -34,50 +34,51 @@ :group 'ledger-reconcile) (defcustom ledger-scale 10000 - "The 10 ^ maximum number of digits you would expect to appear in your reports. -This is a cheap way of getting around floating point silliness in subtraction") + "The 10 ^ maximum number of digits you would expect to appear in your reports. +This is a cheap way of getting around floating point silliness in subtraction" + :group 'ledger) (defun ledger-split-commodity-string (str) "Split a commoditized string, STR, into two parts. Returns a list with (value commodity)." (let ((number-regex (if (assoc "decimal-comma" ledger-environment-alist) - ledger-amount-decimal-comma-regex - ledger-amount-decimal-period-regex))) - (if (> (length str) 0) - (with-temp-buffer - (insert str) - (goto-char (point-min)) - (cond - ((re-search-forward "\"\\(.*\\)\"" nil t) ; look for quoted commodities - (let ((com (delete-and-extract-region - (match-beginning 1) - (match-end 1)))) - (if (re-search-forward - number-regex nil t) - (list - (ledger-string-to-number - (delete-and-extract-region (match-beginning 0) (match-end 0))) - 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 - (ledger-string-to-number - (delete-and-extract-region (match-beginning 0) (match-end 0))) - (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)))) + ledger-amount-decimal-comma-regex + ledger-amount-decimal-period-regex))) + (if (> (length str) 0) + (with-temp-buffer + (insert str) + (goto-char (point-min)) + (cond + ((re-search-forward "\"\\(.*\\)\"" nil t) ; look for quoted commodities + (let ((com (delete-and-extract-region + (match-beginning 1) + (match-end 1)))) + (if (re-search-forward + number-regex nil t) + (list + (ledger-string-to-number + (delete-and-extract-region (match-beginning 0) (match-end 0))) + 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 + (ledger-string-to-number + (delete-and-extract-region (match-beginning 0) (match-end 0))) + (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." - ; break any balances with multi commodities into a list + ; break any balances with multi commodities into a list (mapcar #'(lambda (st) (ledger-split-commodity-string st)) (split-string str "[\n\r]"))) @@ -85,8 +86,10 @@ Returns a list with (value commodity)." (defun -commodity (c1 c2) "Subtract C2 from C1, ensuring their commodities match." (if (string= (cadr c1) (cadr c2)) - ; the scaling below is to get around inexact subtraction results where, for example - ; 1.23 - 4.56 = -3.3299999999999996 instead of -3.33 + ; the scaling below is to get around inexact + ; subtraction results where, for example 1.23 + ; - 4.56 = -3.3299999999999996 instead of + ; -3.33 (list (/ (- (* ledger-scale (car c1)) (* ledger-scale (car c2))) ledger-scale) (cadr c1)) (error "Can't subtract different commodities %S from %S" c2 c1))) @@ -97,50 +100,50 @@ Returns a list with (value commodity)." (error "Can't add different commodities, %S to %S" c1 c2))) (defun ledger-strip (str char) - (let (new-str) - (concat (dolist (ch (append str nil) new-str) - (unless (= ch char) - (setq new-str (append new-str (list ch)))))))) + (let (new-str) + (concat (dolist (ch (append str nil) new-str) + (unless (= ch char) + (setq new-str (append new-str (list ch)))))))) (defun ledger-string-to-number (str &optional decimal-comma) - "improve builtin string-to-number by handling internationalization, and return nil if number can't be parsed" - (let ((nstr (if (or decimal-comma - (assoc "decimal-comma" ledger-environment-alist)) - (ledger-strip str ?.) - (ledger-strip str ?,)))) - (while (string-match "," nstr) ;if there is a comma now, it is a thousands separator - (setq nstr (replace-match "." nil nil nstr))) - (string-to-number nstr))) + "improve builtin string-to-number by handling internationalization, and return nil if number can't be parsed" + (let ((nstr (if (or decimal-comma + (assoc "decimal-comma" ledger-environment-alist)) + (ledger-strip str ?.) + (ledger-strip str ?,)))) + (while (string-match "," nstr) ;if there is a comma now, it is a thousands separator + (setq nstr (replace-match "." nil nil nstr))) + (string-to-number nstr))) (defun ledger-number-to-string (n &optional decimal-comma) - (let ((str (number-to-string n))) - (if (or decimal-comma - (assoc "decimal-comma" ledger-environment-alist)) - (while (string-match "\\." str) - (setq str (replace-match "," nil nil str))) - str))) + (let ((str (number-to-string n))) + (when (or decimal-comma + (assoc "decimal-comma" ledger-environment-alist)) + (while (string-match "\\." str) + (setq str (replace-match "," nil nil str)))) + str)) (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 ((str (ledger-number-to-string (car c1))) - (commodity (cadr c1))) - (if (> (length commodity) 1) - (concat str " " commodity) - (concat commodity " " str)))) + (let ((str (ledger-number-to-string (car c1))) + (commodity (cadr c1))) + (if (> (length commodity) 1) + (concat str " " commodity) + (concat commodity " " str)))) (defun ledger-read-commodity-string (prompt) (let ((str (read-from-minibuffer - (concat prompt " (" ledger-reconcile-default-commodity "): "))) - comm) + (concat prompt " (" ledger-reconcile-default-commodity "): "))) + comm) (if (and (> (length str) 0) - (ledger-split-commodity-string str)) - (progn - (setq comm (ledger-split-commodity-string str)) - (if (cadr comm) - comm - (list (car comm) ledger-reconcile-default-commodity)))))) + (ledger-split-commodity-string str)) + (progn + (setq comm (ledger-split-commodity-string str)) + (if (cadr comm) + comm + (list (car comm) ledger-reconcile-default-commodity)))))) (provide 'ledger-commodities) |