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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 18e65a34d5..71045dbd47 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,50 @@ +2012-05-23 Paul Eggert <eggert@cs.ucla.edu> + + mktime: avoid signed integer overflow + * time/mktime.c (__mktime_internal): Do not mishandle the case + where diff == INT_MIN. + + mktime: simplify computation of average + * time/mktime.c (ranged_convert): Use new time_t_avg function + instead of rolling our own (probably-slower) code. + + mktime: do not assume signed right shift propagates sign bit + * time/mktime.c (isdst_differ): New static function. + (__mktime_internal): No need to normalize tm_isdst now. + (__mktime_internal, not_equal_tm): Use isdst_differ to compare + tm_isdst values. + + mktime: merge another wrapv change from gnulib + * time/mktime.c (TYPE_MAXIMUM): Rework slightly to avoid diagnostics + from some compilers. + + mktime: remove incorrect attempt at unusual arithmetics + * time/mktime.c (TYPE_ONES_COMPLEMENT, TYPE_SIGNED_MAGNITUDE): Remove. + The code didn't really work on such machines anyway. + (TYPE_MINIMUM): Assume two's complement. + (twos_complement_arithmetic): Verify that long_int and time_t + are two's complement (or unsigned, in the latter case). + + mktime: check signed shifts on long_int and time_t, too + * time/mktime.c (SHR): Check that shifts work as desired + on the types long_int and time_t too, as SHR is used on + such types. + + mktime: do not assume 'long' is wide enough + * time/mktime.c (verify): Move decl up. + (long_int): New type. + (leapyear, ydhms_diff, guess_time_tm, __mktime_internal): Use it, + to remove assumption in the code that 'long' is wide enough to + store year values. This assumption is not true on x32 and on + some non-glibc platforms. + + mktime: merge wrapv change from gnulib + * time/mktime.c (WRAPV): New macro. + (time_t_avg, time_t_add_ok, time_t_int_add_ok): New static functions. + (guess_time_tm, __mktime_internal): Do not assume that signed + integer overflow wraps around; modern compilers generate code + where this assumption is no longer valid. + 2012-05-23 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/unix/sysv/linux/i386/sysdep.h (SYSCALL_ERROR_HANDLER): |