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zdump now uses localtime_rz if available.

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This is significantly faster and is cleaner internally.
* Makefile, NEWS: Document this.
* zdump.c (NETBSD_INSPIRED): Default to 1.
(HAVE_LOCALTIME_RZ): New macro; defaults to NETBSD_INSPIRED && USE_LTZ.
(timezone_t) [!HAVE_LOCALTIME_RZ]: New macro, as a substitute.
(localtime_r) [!HAVE_LOCALTIME_RZ && (!HAVE_LOCALTIME_R||!HAVE_TZSET)]:
(localtime_rz, tzalloc, tzfree) [!HAVE_LOCALTIME_RZ]:
(mktime_rz) [!HAVE_LOCALTIME_RZ && TYPECHECK]:
New substitute function and macro, compatible with NetBSD.
All other uses of localtime_r changed to use localtime_rz.
(settimezone): Remove; all uses replaced by tzalloc.
(tzalloc): Use most of the code of the old settimezone function,
but don't free the old storage.
(tzfree): Free it here instead.
(my_localtime_rz): Rename from my_localtime_r, and make it
compatible with localtime_rz.  All uses changed.
(saveabbr): Return the abbreviation.  If HAVE_LOCALTIME_RZ
simply return the output of abbr; that's faster.
(main): Diagnose any tzalloc failure.  tzfree after use.
(hunt, show): New timezone_t arg.  All uses changed.
This commit is contained in:
Paul Eggert
2014-08-24 23:46:36 -07:00
parent f99b8f1414
commit 61bdeb997b
3 changed files with 126 additions and 60 deletions
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3
Makefile
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@ -110,6 +110,9 @@ LDLIBS=
# -DHAVE_INTTYPES_H=1 if you have a pre-C99 compiler with "inttypes.h"
# -DHAVE_LINK=0 if your system lacks a link function
# -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function
# -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
# This defaults to 1 if localtime_rz is known to be available.
# localtime_rz can make zdump significantly faster, but is nonstandard.
# -DHAVE_SETTIMEOFDAY=0 if settimeofday does not exist (SVR0?)
# -DHAVE_SETTIMEOFDAY=1 if settimeofday has just 1 arg (SVR4)
# -DHAVE_SETTIMEOFDAY=2 if settimeofday uses 2nd arg (4.3BSD)