;;; parse-time.el --- parsing time strings
-;; Copyright (C) 1996, 2000-2012 Free Software Foundation, Inc.
+;; Copyright (C) 1996, 2000-2015 Free Software Foundation, Inc.
;; Author: Erik Naggum <erik@naggum.no>
;; Keywords: util
;;; Code:
-(eval-when-compile (require 'cl)) ;and ah ain't kiddin' 'bout it
-
(eval-and-compile
- (when (featurep 'xemacs)
- (defvar parse-time-syntax (make-vector 256 nil))))
-(defvar parse-time-digits (make-vector 256 nil))
+ (ignore-errors (require 'cl-lib)))
+(eval-when-compile
+ (require 'cl) ;and ah ain't kiddin' 'bout it
+ (defalias 'parse-time-incf (if (featurep 'cl-lib) 'cl-incf 'incf)))
;; Byte-compiler warnings
(defvar parse-time-elt)
(defvar parse-time-val)
-(unless (aref parse-time-digits ?0)
- (loop for i from ?0 to ?9
- do (aset parse-time-digits i (- i ?0))))
-
-(when (featurep 'xemacs)
- (unless (aref parse-time-syntax ?0)
- (loop for i from ?0 to ?9
- do (aset parse-time-syntax i ?0))
- (loop for i from ?A to ?Z
- do (aset parse-time-syntax i ?A))
- (loop for i from ?a to ?z
- do (aset parse-time-syntax i ?a))
- (aset parse-time-syntax ?+ 1)
- (aset parse-time-syntax ?- -1)
- (aset parse-time-syntax ?: ?d)))
-
-(defsubst digit-char-p (char)
- (aref parse-time-digits char))
-
(eval-and-compile
(if (featurep 'xemacs)
- (defsubst parse-time-string-chars (char)
- (and (< char (length parse-time-syntax))
- (aref parse-time-syntax char)))
+ (progn
+ (defvar parse-time-syntax (make-vector 256 nil))
+ (loop for i from ?0 to ?9
+ do (aset parse-time-syntax i ?0))
+ (loop for i from ?A to ?Z
+ do (aset parse-time-syntax i ?A))
+ (loop for i from ?a to ?z
+ do (aset parse-time-syntax i ?a))
+ (aset parse-time-syntax ?+ 1)
+ (aset parse-time-syntax ?- -1)
+ (aset parse-time-syntax ?: ?d)
+ (defsubst parse-time-string-chars (char)
+ (and (< char (length parse-time-syntax))
+ (aref parse-time-syntax char))))
(defsubst parse-time-string-chars (char)
(save-match-data
(let (case-fold-search str)
((string-match "[[:lower:]]" str) ?a)
((string-match "[[:digit:]]" str) ?0)))))))
-(put 'parse-error 'error-conditions '(parse-error error))
-(put 'parse-error 'error-message "Parsing error")
-
-(defsubst parse-integer (string &optional start end)
- "[CL] Parse and return the integer in STRING, or nil if none."
- (let ((integer 0)
- (digit 0)
- (index (or start 0))
- (end (or end (length string))))
- (when (< index end)
- (let ((sign (aref string index)))
- (if (or (eq sign ?+) (eq sign ?-))
- (setq sign (parse-time-string-chars sign)
- index (1+ index))
- (setq sign 1))
- (while (and (< index end)
- (setq digit (digit-char-p (aref string index))))
- (setq integer (+ (* integer 10) digit)
- index (1+ index)))
- (if (/= index end)
- (signal 'parse-error `("not an integer"
- ,(substring string (or start 0) end)))
- (* sign integer))))))
+(eval-and-compile
+ (if (fboundp 'cl-parse-integer)
+ (defalias 'parse-time-integer 'cl-parse-integer)
+ (defvar parse-time-digits (make-vector 256 nil))
+ (loop for i from ?0 to ?9
+ do (aset parse-time-digits i (- i ?0)))
+ (defun parse-time-integer (string &rest keys)
+ "[CL] Parse and return the integer in STRING, or nil if none."
+ (let* ((start (plist-get keys :start))
+ (end (or (plist-get keys :end) (length string)))
+ (integer 0)
+ (digit 0)
+ (index (or start 0)))
+ (when (< index end)
+ (let ((sign (aref string index)))
+ (if (or (eq sign ?+) (eq sign ?-))
+ (setq sign (parse-time-string-chars sign)
+ index (1+ index))
+ (setq sign 1))
+ (while (and (< index end)
+ (setq digit (aref parse-time-digits
+ (aref string index))))
+ (setq integer (+ (* integer 10) digit)
+ index (1+ index)))
+ (if (/= index end)
+ (error "Not an integer string: `%s'" string)
+ (* sign integer))))))))
(defun parse-time-tokenize (string)
"Tokenize STRING into substrings."
(index 0)
(c nil))
(while (< index end)
- (while (and (< index end) ;skip invalid characters
+ (while (and (< index end) ;Skip invalid characters.
(not (setq c (parse-time-string-chars (aref string index)))))
- (incf index))
+ (parse-time-incf index))
(setq start index all-digits (eq c ?0))
- (while (and (< (incf index) end) ;scan valid characters
+ (while (and (< (parse-time-incf index) end) ;Scan valid characters.
(setq c (parse-time-string-chars (aref string index))))
(setq all-digits (and all-digits (eq c ?0))))
(if (<= index end)
- (push (if all-digits (parse-integer string start index)
+ (push (if all-digits (parse-time-integer string
+ :start start :end index)
(substring string start index))
list)))
(nreverse list)))
`(((6) parse-time-weekdays)
((3) (1 31))
((4) parse-time-months)
- ((5) (100 4038))
+ ((5) (100 ,most-positive-fixnum))
((2 1 0)
,#'(lambda () (and (stringp parse-time-elt)
(= (length parse-time-elt) 8)
(= 5 (length parse-time-elt))
(or (= (aref parse-time-elt 0) ?+)
(= (aref parse-time-elt 0) ?-))))
- ,#'(lambda () (* 60 (+ (parse-integer parse-time-elt 3 5)
- (* 60 (parse-integer parse-time-elt 1 3)))
+ ,#'(lambda () (* 60 (+ (parse-time-integer parse-time-elt :start 3 :end 5)
+ (* 60 (parse-time-integer parse-time-elt
+ :start 1 :end 3)))
(if (= (aref parse-time-elt 0) ?-) -1 1))))
((5 4 3)
,#'(lambda () (and (stringp parse-time-elt)
(predicate (pop rule))
(parse-time-val))
(when (and (not (nth (car slots) time)) ;not already set
- (setq parse-time-val (cond ((and (consp predicate)
- (not (eq (car predicate)
- 'lambda)))
- (and (numberp parse-time-elt)
- (<= (car predicate) parse-time-elt)
- (<= parse-time-elt (cadr predicate))
- parse-time-elt))
- ((symbolp predicate)
- (cdr (assoc parse-time-elt
- (symbol-value predicate))))
- ((funcall predicate)))))
+ (setq parse-time-val
+ (cond ((and (consp predicate)
+ (not (eq (car predicate)
+ 'lambda)))
+ (and (numberp parse-time-elt)
+ (<= (car predicate) parse-time-elt)
+ (<= parse-time-elt (cadr predicate))
+ parse-time-elt))
+ ((symbolp predicate)
+ (cdr (assoc parse-time-elt
+ (symbol-value predicate))))
+ ((funcall predicate)))))
(setq exit t)
(while slots
- (let ((new-val (and rule
- (let ((this (pop rule)))
- (if (vectorp this)
- (parse-integer
- parse-time-elt
- (aref this 0) (aref this 1))
- (funcall this))))))
- (rplaca (nthcdr (pop slots) time)
- (or new-val parse-time-val)))))))))
+ (let ((new-val (if rule
+ (let ((this (pop rule)))
+ (if (vectorp this)
+ (parse-time-integer
+ parse-time-elt
+ :start (aref this 0)
+ :end (aref this 1))
+ (funcall this)))
+ parse-time-val)))
+ (rplaca (nthcdr (pop slots) time) new-val))))))))
time))
+(defconst parse-time-iso8601-regexp
+ (let* ((dash "-?")
+ (colon ":?")
+ (4digit "\\([0-9][0-9][0-9][0-9]\\)")
+ (2digit "\\([0-9][0-9]\\)")
+ (date-fullyear 4digit)
+ (date-month 2digit)
+ (date-mday 2digit)
+ (time-hour 2digit)
+ (time-minute 2digit)
+ (time-second 2digit)
+ (time-secfrac "\\(\\.[0-9]+\\)?")
+ (time-numoffset (concat "[-+]\\(" time-hour "\\):" time-minute))
+ (time-offset (concat "Z" time-numoffset))
+ (partial-time (concat time-hour colon time-minute colon time-second
+ time-secfrac))
+ (full-date (concat date-fullyear dash date-month dash date-mday))
+ (full-time (concat partial-time time-offset))
+ (date-time (concat full-date "T" full-time)))
+ (list (concat "^" full-date)
+ (concat "T" partial-time)
+ (concat "Z" time-numoffset)))
+ "List of regular expressions matching ISO 8601 dates.
+1st regular expression matches the date.
+2nd regular expression matches the time.
+3rd regular expression matches the (optional) timezone specification.")
+
+(defun parse-iso8601-time-string (date-string)
+ (let* ((date-re (nth 0 parse-time-iso8601-regexp))
+ (time-re (nth 1 parse-time-iso8601-regexp))
+ (tz-re (nth 2 parse-time-iso8601-regexp))
+ re-start
+ time seconds minute hour fractional-seconds
+ day month year day-of-week dst tz)
+ ;; We need to populate 'time' with
+ ;; (SEC MIN HOUR DAY MON YEAR DOW DST TZ)
+
+ ;; Nobody else handles iso8601 correctly, let's do it ourselves.
+ (when (string-match date-re date-string re-start)
+ (setq year (string-to-number (match-string 1 date-string))
+ month (string-to-number (match-string 2 date-string))
+ day (string-to-number (match-string 3 date-string))
+ re-start (match-end 0))
+ (when (string-match time-re date-string re-start)
+ (setq hour (string-to-number (match-string 1 date-string))
+ minute (string-to-number (match-string 2 date-string))
+ seconds (string-to-number (match-string 3 date-string))
+ fractional-seconds (string-to-number (or
+ (match-string 4 date-string)
+ "0"))
+ re-start (match-end 0))
+ (when (string-match tz-re date-string re-start)
+ (setq tz (match-string 1 date-string)))
+ (setq time (list seconds minute hour day month year day-of-week dst tz))))
+
+ ;; Fall back to having Gnus do fancy things for us.
+ (when (not time)
+ (setq time (parse-time-string date-string)))
+
+ (and time
+ (apply 'encode-time time))))
+
(provide 'parse-time)
;;; parse-time.el ends here
projects / gnus / blobdiff