ledger/lisp/ldg-regex.el
2013-03-06 14:36:31 -05:00

274 lines
7.6 KiB
EmacsLisp

;;; ldg-regex.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.
(require 'rx)
(eval-when-compile
(require 'cl))
(defvar ledger-date-regex
"\\([0-9]+\\)[/-]\\([0-9]+\\)[/-]\\([0-9]+\\)")
(defmacro ledger-define-regexp (name regex docs &rest args)
"Simplify the creation of a Ledger regex and helper functions."
(let ((defs
(list
`(defconst
,(intern (concat "ledger-" (symbol-name name) "-regexp"))
,(eval regex))))
(addend 0) last-group)
(if (null args)
(progn
(nconc
defs
(list
`(defconst
,(intern
(concat "ledger-regex-" (symbol-name name) "-group"))
1)))
(nconc
defs
(list
`(defconst
,(intern (concat "ledger-regex-" (symbol-name name)
"-group--count"))
1)))
(nconc
defs
(list
`(defmacro
,(intern (concat "ledger-regex-" (symbol-name name)))
(&optional string)
,(format "Return the match string for the %s" name)
(match-string
,(intern (concat "ledger-regex-" (symbol-name name)
"-group"))
string)))))
(dolist (arg args)
(let (var grouping target)
(if (symbolp arg)
(setq var arg target arg)
(assert (listp arg))
(if (= 2 (length arg))
(setq var (car arg)
target (cadr arg))
(setq var (car arg)
grouping (cadr arg)
target (caddr arg))))
(if (and last-group
(not (eq last-group (or grouping target))))
(incf addend
(symbol-value
(intern-soft (concat "ledger-regex-"
(symbol-name last-group)
"-group--count")))))
(nconc
defs
(list
`(defconst
,(intern (concat "ledger-regex-" (symbol-name name)
"-group-" (symbol-name var)))
,(+ addend
(symbol-value
(intern-soft
(if grouping
(concat "ledger-regex-" (symbol-name grouping)
"-group-" (symbol-name target))
(concat "ledger-regex-" (symbol-name target)
"-group"))))))))
(nconc
defs
(list
`(defmacro
,(intern (concat "ledger-regex-" (symbol-name name)
"-" (symbol-name var)))
(&optional string)
,(format "Return the sub-group match for the %s %s."
name var)
(match-string
,(intern (concat "ledger-regex-" (symbol-name name)
"-group-" (symbol-name var)))
string))))
(setq last-group (or grouping target))))
(nconc defs
(list
`(defconst ,(intern (concat "ledger-regex-" (symbol-name name)
"-group--count"))
,(length args)))))
(cons 'progn defs)))
(put 'ledger-define-regexp 'lisp-indent-function 1)
(ledger-define-regexp date
(let ((sep '(or ?- (any ?. ?/)))) ; can't do (any ?- ?. ?/) due to bug
(rx (group
(and (? (= 4 num)
(eval sep))
(and num (? num))
(eval sep)
(and num (? num))))))
"Match a single date, in its 'written' form.")
(ledger-define-regexp full-date
(macroexpand
`(rx (and (regexp ,ledger-date-regexp)
(? (and ?= (regexp ,ledger-date-regexp))))))
"Match a compound date, of the form ACTUAL=EFFECTIVE"
(actual date)
(effective date))
(ledger-define-regexp state
(rx (group (any ?! ?*)))
"Match a transaction or posting's \"state\" character.")
(ledger-define-regexp code
(rx (and ?\( (group (+? (not (any ?\))))) ?\)))
"Match the transaction code.")
(ledger-define-regexp long-space
(rx (and (*? blank)
(or (and ? (or ? ?\t)) ?\t)))
"Match a \"long space\".")
(ledger-define-regexp note
(rx (group (+ nonl)))
"")
(ledger-define-regexp end-note
(macroexpand
`(rx (and (regexp ,ledger-long-space-regexp) ?\;
(regexp ,ledger-note-regexp))))
"")
(ledger-define-regexp full-note
(macroexpand
`(rx (and line-start (+ blank)
?\; (regexp ,ledger-note-regexp))))
"")
(ledger-define-regexp xact-line
(macroexpand
`(rx (and line-start
(regexp ,ledger-full-date-regexp)
(? (and (+ blank) (regexp ,ledger-state-regexp)))
(? (and (+ blank) (regexp ,ledger-code-regexp)))
(+ blank) (+? nonl)
(? (regexp ,ledger-end-note-regexp))
line-end)))
"Match a transaction's first line (and optional notes)."
(actual-date full-date actual)
(effective-date full-date effective)
state
code
(note end-note))
(ledger-define-regexp account
(rx (group (and (not (any blank ?\[ ?\( ?: ?\;)) (*? nonl))))
"")
(ledger-define-regexp account-kind
(rx (group (? (any ?\[ ?\())))
"")
(ledger-define-regexp full-account
(macroexpand
`(rx (and (regexp ,ledger-account-kind-regexp)
(regexp ,ledger-account-regexp)
(? (any ?\] ?\))))))
""
(kind account-kind)
(name account))
(ledger-define-regexp commodity
(rx (group
(or (and ?\" (+ (not (any ?\"))) ?\")
(not (any blank ?\n
digit
?- ?\[ ?\]
?. ?, ?\; ?+ ?* ?/ ?^ ?? ?: ?& ?| ?! ?=
?\< ?\> ?\{ ?\} ?\( ?\) ?@)))))
"")
(ledger-define-regexp amount
(rx (group
(and (? ?-)
(and (+ digit)
(*? (and (any ?. ?,) (+ digit))))
(? (and (any ?. ?,) (+ digit))))))
"")
(ledger-define-regexp commoditized-amount
(macroexpand
`(rx (group
(or (and (regexp ,ledger-commodity-regexp)
(*? blank)
(regexp ,ledger-amount-regexp))
(and (regexp ,ledger-amount-regexp)
(*? blank)
(regexp ,ledger-commodity-regexp))))))
"")
(ledger-define-regexp commodity-annotations
(macroexpand
`(rx (* (+ blank)
(or (and ?\{ (regexp ,ledger-commoditized-amount-regexp) ?\})
(and ?\[ (regexp ,ledger-date-regexp) ?\])
(and ?\( (not (any ?\))) ?\))))))
"")
(ledger-define-regexp cost
(macroexpand
`(rx (and (or "@" "@@") (+ blank)
(regexp ,ledger-commoditized-amount-regexp))))
"")
(ledger-define-regexp balance-assertion
(macroexpand
`(rx (and ?= (+ blank)
(regexp ,ledger-commoditized-amount-regexp))))
"")
(ledger-define-regexp full-amount
(macroexpand `(rx (group (+? (not (any ?\;))))))
"")
(ledger-define-regexp post-line
(macroexpand
`(rx (and line-start (+ blank)
(? (and (regexp ,ledger-state-regexp) (* blank)))
(regexp ,ledger-full-account-regexp)
(? (and (regexp ,ledger-long-space-regexp)
(regexp ,ledger-full-amount-regexp)))
(? (regexp ,ledger-end-note-regexp))
line-end)))
""
state
(account-kind full-account kind)
(account full-account name)
(amount full-amount)
(note end-note))
(provide 'ldg-regex)