I am running into a problem with boost::posix_time::from_time_t() on a PC with, windows xp, visual studio 2010.  When I input a number larger than the decimal equivalent of 0x7FFFFFFF (maximum posssible int32) into the function it returns a ptime with a date of 1902 or something close to.  I assume the UNIX equivalent of time_t is a int32 and that is why I am having this problem, but I know a time_t is the equivalent to __int64 in windows xp.

Is there is a MACRO define I am missing or is this a bug that needs to be fixed with this function so that it can accept the windows equivalent of time_t? Shouldn't this function accept and convert larger intigers thank int32 to a ptime or do I have to write my own?

The function looks like this: conversion.hpp, line 27: ptime from_time_t(std::time_t t) { ptime start(gregorian::date(1970,1,1)); return start + seconds(static_cast<long>(t)); } As you see, it deliberately truncates time_t to long (which has sizeof == 4, when compiling in 32bit), because seconds() constructor accepts long. The most simple patch would be the following: --return start + seconds(static_cast<long>(t)); ++return start + milliseconds(t * 1000);