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* libc/time/strftime.c (__strftime): Utilize __TM_GMTOFF and __TM_ZONE 

on systems where available.  On Cygwin, call function to get values.
	Add comment to explain why.  Drop TZ_LOCK/TZ_UNLOCK in 'z' case since
	it's not necessary.  In 'Z' case, add a comment to document a potential
	codeset problem.
This commit is contained in:
Corinna Vinschen 2015-01-08 09:51:34 +00:00
parent fc55214612
commit 808fde520f
2 changed files with 40 additions and 6 deletions
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8
newlib/ChangeLog
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@ -1,3 +1,11 @@
2015-01-08 Corinna Vinschen <vinschen@redhat.com>
* libc/time/strftime.c (__strftime): Utilize __TM_GMTOFF and __TM_ZONE
on systems where available. On Cygwin, call function to get values.
Add comment to explain why. Drop TZ_LOCK/TZ_UNLOCK in 'z' case since
it's not necessary. In 'Z' case, add a comment to document a potential
codeset problem.
2015-01-08 Renlin Li <renlin.li@arm.com>
* testsuite/newlib.wctype/twctrans.c (main): Use towlower and towupper.

38
newlib/libc/time/strftime.c
View File

@ -1283,13 +1283,24 @@ recurse:
if (tim_p->tm_isdst >= 0)
{
long offset;
#if defined (__CYGWIN__)
/* Cygwin must check if the application has been built with or
without the extra tm members for backward compatibility, and
then use either that or the old method fetching from tzinfo.
Rather than pulling in the version check infrastructure, we
just call a Cygwin function. */
extern long __cygwin_gettzoffset (const struct tm *tmp);
offset = __cygwin_gettzoffset (tim_p);
#elif defined (__TM_GMTOFF)
offset = tim_p->__TM_GMTOFF;
#else
__tzinfo_type *tz = __gettzinfo ();
TZ_LOCK;
/* The sign of this is exactly opposite the envvar TZ. We
could directly use the global _timezone for tm_isdst==0,
but have to use __tzrule for daylight savings. */
could directly use the global _timezone for tm_isdst==0,
but have to use __tzrule for daylight savings. */
offset = -tz->__tzrule[tim_p->tm_isdst > 0].offset;
TZ_UNLOCK;
#endif
len = snprintf (&s[count], maxsize - count, CQ("%+03ld%.2ld"),
offset / SECSPERHOUR,
labs (offset / SECSPERMIN) % 60L);
@ -1300,12 +1311,27 @@ recurse:
if (tim_p->tm_isdst >= 0)
{
size_t size;
const char *tznam;
TZ_LOCK;
size = strlen(_tzname[tim_p->tm_isdst > 0]);
#if defined (__CYGWIN__)
/* See above. */
extern const char *__cygwin_gettzname (const struct tm *tmp);
tznam = __cygwin_gettzname (tim_p);
#elif defined (__TM_ZONE)
tznam = tim_p->__TM_ZONE;
#else
tznam = _tzname[tim_p->tm_isdst > 0];
#endif
/* Note that in case of wcsftime this loop only works for
timezone abbreviations using the portable codeset (aka ASCII).
This seems to be the case, but if that ever changes, this
loop needs revisiting. */
size = strlen (tznam);
for (i = 0; i < size; i++)
{
if (count < maxsize - 1)
s[count++] = _tzname[tim_p->tm_isdst > 0][i];
s[count++] = tznam[i];
else
{
TZ_UNLOCK;