Subj : Re: Date problem
To   : netscape.public.mozilla.jseng
From : Shanti Rao <shanti@raosoft.com>
Date : Mon Apr 12 2004 05:42 pm

There was a subtle solution. The macro JSLL_INIT in jslong.h seems to give the
wrong value occasionally if your compiler has a native __int64 type. Here's a
demonstartion that compiles with GCC on Windows. It will print out two lines,
the first with a correct JS date code, the second 369 years in the future.

---------

#include "windows.h"
#include "stdio.h"

int main(int, char**)
{
  FILETIME time;
  __int64 a,b,s,us;
  char t[128];

  GetSystemTimeAsFileTime(&time);

  us = (__int64)(time.dwLowDateTime);
  s = (__int64)(time.dwHighDateTime);
  a = (s << 32) + us;
  a = a - (((__int64)0x19db1de << 32) + 0xd53e8000);
  a = a / 10000;

  _i64toa(a, t, 10);
  puts(t);

  b = (s << 32) + us;
  b = b - ((0x19db1de << 32) + 0xd53e8000);
  b = b / 10000;

  _i64toa(b, t, 10);
  puts(t);

  return 0;
}

--------

The simple workaround is to make a change to lines 321ff of prmjtime.c

#ifdef XP_WIN
     JSInt64 s, us,
     /*win2un = JSLL_INIT(0x19DB1DE, 0xD53E8000),*/
     win2un = (__int64)0x19DB1DE << 32 + 0xD53E8000,
     ten = JSLL_INIT(0, 10);
     FILETIME time, midnight;
#endif

The macro JSLL_INIT is used three other times in jslong.c. Similar
modifications are obvious.

Hope that helps somebody else,

Shanti

.