[gnus git] branch master updated: m0-5-48-g2a7f004 =1= time-date.el: Support higher-resolution time stamps (Bug#9000)
Katsumi Yamaoka <[email protected]>
| Newsgroups | gmane.emacs.gnus.cvs |
|---|---|
| Message-ID | <[email protected]> |
via 2a7f00482e95c81a430b5817e6489a4bea8620b0 (commit)
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- Log -----------------------------------------------------------------
commit 2a7f00482e95c81a430b5817e6489a4bea8620b0
Author: Paul Eggert <[email protected]>
Date: Sun Jun 24 12:35:38 2012 +0000
time-date.el: Support higher-resolution time stamps (Bug#9000)
diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 45bbcc7..fde5c95 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,15 @@
+2012-06-22 Paul Eggert <[email protected]>
+
+ Support higher-resolution time stamps (Bug#9000).
+
+ * time-date.el (with-decoded-time-value): New arg PICO-SYMBOL in
+ VARLIST. It's optional, for backward compatibility.
+ (encode-time-value): New optional arg PICO. New type 3.
+ (time-to-seconds) [!float-time]: Support the new picoseconds
+ component if it's used.
+ (seconds-to-time, time-subtract, time-add):
+ Support ps-resolution time stamps as well.
+
2012-06-19 Julien Danjou <[email protected]>
* nnir.el (nnir-run-imap): Fix, use `nnimap-change-group'.
diff --git a/lisp/time-date.el b/lisp/time-date.el
index 46e38ae..38b7660 100644
--- a/lisp/time-date.el
+++ b/lisp/time-date.el
@@ -23,15 +23,15 @@
;;; Commentary:
-;; Time values come in three formats. The oldest format is a cons
+;; Time values come in several formats. The oldest format is a cons
;; cell of the form (HIGH . LOW). This format is obsolete, but still
-;; supported. The two other formats are the lists (HIGH LOW) and
-;; (HIGH LOW MICRO). The first two formats specify HIGH * 2^16 + LOW
-;; seconds; the third format specifies HIGH * 2^16 + LOW + MICRO /
-;; 1000000 seconds. We should have 0 <= MICRO < 1000000 and 0 <= LOW
-;; < 2^16. If the time value represents a point in time, then HIGH is
-;; nonnegative. If the time value is a time difference, then HIGH can
-;; be negative as well. The macro `with-decoded-time-value' and the
+;; supported. The other formats are the lists (HIGH LOW), (HIGH LOW
+;; USEC), and (HIGH LOW USEC PSEC). These formats specify the time
+;; value equal to HIGH * 2^16 + LOW + USEC * 10^-6 + PSEC * 10^-12
+;; seconds, where missing components are treated as zero. HIGH can be
+;; negative, either because the value is a time difference, or because
+;; the machine supports negative time stamps that fall before the
+;; epoch. The macro `with-decoded-time-value' and the
;; function `encode-time-value' make it easier to deal with these
;; three formats. See `time-subtract' for an example of how to use
;; them.
@@ -44,13 +44,15 @@
The value of the last form in BODY is returned.
Each element of the list VARLIST is a list of the form
-\(HIGH-SYMBOL LOW-SYMBOL MICRO-SYMBOL [TYPE-SYMBOL] TIME-VALUE).
+\(HIGH-SYMBOL LOW-SYMBOL MICRO-SYMBOL [PICO-SYMBOL [TYPE-SYMBOL]] TIME-VALUE).
The time value TIME-VALUE is decoded and the result it bound to
the symbols HIGH-SYMBOL, LOW-SYMBOL and MICRO-SYMBOL.
+The optional PICO-SYMBOL is bound to the picoseconds part.
The optional TYPE-SYMBOL is bound to the type of the time value.
Type 0 is the cons cell (HIGH . LOW), type 1 is the list (HIGH
-LOW), and type 2 is the list (HIGH LOW MICRO)."
+LOW), type 2 is the list (HIGH LOW MICRO), and type 3 is the
+list (HIGH LOW MICRO PICO)."
(declare (indent 1)
(debug ((&rest (symbolp symbolp symbolp &or [symbolp form] form))
body)))
@@ -59,6 +61,8 @@ LOW), and type 2 is the list (HIGH LOW MICRO)."
(high (pop elt))
(low (pop elt))
(micro (pop elt))
+ (pico (unless (<= (length elt) 2)
+ (pop elt)))
(type (unless (eq (length elt) 1)
(pop elt)))
(time-value (car elt))
@@ -66,28 +70,44 @@ LOW), and type 2 is the list (HIGH LOW MICRO)."
`(let* ,(append `((,gensym ,time-value)
(,high (pop ,gensym))
,low ,micro)
+ (when pico `(,pico))
(when type `(,type)))
(if (consp ,gensym)
(progn
(setq ,low (pop ,gensym))
(if ,gensym
- ,(append `(setq ,micro (car ,gensym))
- (when type `(,type 2)))
+ (progn
+ (setq ,micro (car ,gensym))
+ ,(cond (pico
+ `(if (cdr ,gensym)
+ ,(append `(setq ,pico (cadr ,gensym))
+ (when type `(,type 3)))
+ ,(append `(setq ,pico 0)
+ (when type `(,type 2)))))
+ (type
+ `(setq type 2))))
,(append `(setq ,micro 0)
+ (when pico `(,pico 0))
(when type `(,type 1)))))
,(append `(setq ,low ,gensym ,micro 0)
+ (when pico `(,pico 0))
(when type `(,type 0))))
(with-decoded-time-value ,varlist ,@body)))
`(progn ,@body)))
-(defun encode-time-value (high low micro type)
- "Encode HIGH, LOW, and MICRO into a time value of type TYPE.
+(defun encode-time-value (high low micro pico &optional type)
+ "Encode HIGH, LOW, MICRO, and PICO into a time value of type TYPE.
Type 0 is the cons cell (HIGH . LOW), type 1 is the list (HIGH LOW),
-and type 2 is the list (HIGH LOW MICRO)."
+type 2 is (HIGH LOW MICRO), and type 3 is (HIGH LOW MICRO PICO).
+
+For backward compatibility, if only four arguments are given,
+it is assumed that PICO was omitted and should be treated as zero."
(cond
((eq type 0) (cons high low))
((eq type 1) (list high low))
- ((eq type 2) (list high low micro))))
+ ((eq type 2) (list high low micro))
+ ((eq type 3) (list high low micro pico))
+ ((null type) (encode-time-value high low micro 0 pico))))
(autoload 'parse-time-string "parse-time")
(autoload 'timezone-make-date-arpa-standard "timezone")
@@ -125,28 +145,45 @@ If DATE lacks timezone information, GMT is assumed."
(subrp (symbol-function 'float-time)))
(defun time-to-seconds (time)
"Convert time value TIME to a floating point number."
- (with-decoded-time-value ((high low micro time))
+ (with-decoded-time-value ((high low micro pico type time))
(+ (* 1.0 high 65536)
low
- (/ micro 1000000.0))))))
+ (/ (+ (* micro 1e6) pico) 1e12))))))
;;;###autoload
(defun seconds-to-time (seconds)
"Convert SECONDS (a floating point number) to a time value."
- (list (floor seconds 65536)
- (floor (mod seconds 65536))
- (floor (* (- seconds (ffloor seconds)) 1000000))))
+ (let* ((usec (* 1000000 (mod seconds 1)))
+ (ps (round (* 1000000 (mod usec 1))))
+ (us (floor usec))
+ (lo (floor (mod seconds 65536)))
+ (hi (floor seconds 65536)))
+ (if (eq ps 1000000)
+ (progn
+ (setq ps 0)
+ (setq us (1+ us))
+ (if (eq us 1000000)
+ (progn
+ (setq us 0)
+ (setq lo (1+ lo))
+ (if (eq lo 65536)
+ (progn
+ (setq lo 0)
+ (setq hi (1+ hi))))))))
+ (list hi lo us ps)))
;;;###autoload
(defun time-less-p (t1 t2)
"Return non-nil if time value T1 is earlier than time value T2."
- (with-decoded-time-value ((high1 low1 micro1 t1)
- (high2 low2 micro2 t2))
+ (with-decoded-time-value ((high1 low1 micro1 pico1 type1 t1)
+ (high2 low2 micro2 pico2 type2 t2))
(or (< high1 high2)
(and (= high1 high2)
(or (< low1 low2)
(and (= low1 low2)
- (< micro1 micro2)))))))
+ (or (< micro1 micro2)
+ (and (= micro1 micro2)
+ (< pico1 pico2)))))))))
;;;###autoload
(defun days-to-time (days)
@@ -173,36 +210,44 @@ TIME should be either a time value or a date-time string."
(defun time-subtract (t1 t2)
"Subtract two time values, T1 minus T2.
Return the difference in the format of a time value."
- (with-decoded-time-value ((high low micro type t1)
- (high2 low2 micro2 type2 t2))
+ (with-decoded-time-value ((high low micro pico type t1)
+ (high2 low2 micro2 pico2 type2 t2))
(setq high (- high high2)
low (- low low2)
micro (- micro micro2)
+ pico (- pico pico2)
type (max type type2))
+ (when (< pico 0)
+ (setq micro (1- micro)
+ pico (+ pico 1000000)))
(when (< micro 0)
(setq low (1- low)
micro (+ micro 1000000)))
(when (< low 0)
(setq high (1- high)
low (+ low 65536)))
- (encode-time-value high low micro type)))
+ (encode-time-value high low micro pico type)))
;;;###autoload
(defun time-add (t1 t2)
"Add two time values T1 and T2. One should represent a time difference."
- (with-decoded-time-value ((high low micro type t1)
- (high2 low2 micro2 type2 t2))
+ (with-decoded-time-value ((high low micro pico type t1)
+ (high2 low2 micro2 pico2 type2 t2))
(setq high (+ high high2)
low (+ low low2)
micro (+ micro micro2)
+ pico (+ pico pico2)
type (max type type2))
+ (when (>= pico 1000000)
+ (setq micro (1+ micro)
+ pico (- pico 1000000)))
(when (>= micro 1000000)
(setq low (1+ low)
micro (- micro 1000000)))
(when (>= low 65536)
(setq high (1+ high)
low (- low 65536)))
- (encode-time-value high low micro type)))
+ (encode-time-value high low micro pico type)))
;;;###autoload
(defun date-to-day (date)
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Summary of changes:
lisp/ChangeLog | 12 ++++++
lisp/time-date.el | 105 ++++++++++++++++++++++++++++++++++++++---------------
2 files changed, 87 insertions(+), 30 deletions(-)
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