[BZ #473, BZ #487]

[thirdparty/glibc.git] / ChangeLog

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+2004-10-27  Derek R. Price  <derek@ximbiot.com>
+
+       [BZ #487] This change is imported from gnulib.
+       * time/mktime.c (not_equal_tm) [DEBUG]: Remove redundant check.
+
+2004-10-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+       [BZ #473]
+       * time/tst-mktime.c (main): Don't assume that mktime fails
+       when given time stamps before 1970.  It returns negative
+       time_t values instead, for compatibility with BSD.
+
+       * time/tst-mktime2.c: New file.
+       * time/Makefile (tests): Add it.
+
+       [BZ #473] Import from gnulib.  Revamp to avoid several problems near
+       time_t extrema, and on hosts with 64-bit time_t and 32-bit int.
+       This fixes Debian bug 177940.
+       * time/mktime.c (TIME_T_MIDPOINT): New macro.
+       (ydhms_diff): Renamed from ydhms_tm_diff, with a new signature,
+       which avoids overflow problems on hosts with 64-bit time_t and
+       32-bit int.  All callers changed.  Now an inline function.
+       Verify at compile-time that long int is wide enough to avoid
+       these overflow problems.
+       (guess_time_tm): New function.
+       (__mktime_internal): Use it.  Avoid overflow when computing yday on
+       hosts with 64-bit long and 32-bit int.  Remove tests for 69;
+       no longer needed.  Use if rather than #ifdef for LEAP_SECONDS_POSSIBLE
+       so that the code is checked by more compilers.
+       Do not rely on floating point to probe: stick to integer arithmetic,
+       to avoid potential porting problems.
+       Repair potential overflow correctly in the Southern Hemisphere.
+       (localtime_offset): Add a FIXME for the case where time_t is unsigned.
+
 2004-10-30  Andreas Schwab  <schwab@suse.de>
 
        * sysdeps/m68k/dl-machine.h (elf_machine_rela)