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Fix a nasty bug exposed by mktime() when time_t is significantly bigger

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than 32 bits.  It was trying to figure out things like the day of week
of when time_t is roughly 2^62 etc.  Make a better guess for the starting
point for the binary search that works on both 32 and 64 bit types.  I have
been using this for a while now.
This commit is contained in:
Peter Wemm 2002-09-03 04:34:10 +00:00
parent 162e98939f
commit b331ec93c0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=102885
1 changed files with 6 additions and 0 deletions
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6
lib/libc/stdtime/localtime.c
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@ -1475,6 +1475,12 @@ int * const okayp;
** (this works whether time_t is signed or unsigned).
*/
bits = TYPE_BIT(time_t) - 1;
/*
* Limit to 32 bits or the things go crazy
* when it tries to figure out times near 2^62 etc.
*/
if (bits > 31)
bits = 31;
/*
** If time_t is signed, then 0 is just above the median,
** assuming two's complement arithmetic.