cpython/Modules/_time.c

29 lines
899 B
C

#include "Python.h"
#include "_time.h"
/* Exposed in timefuncs.h. */
time_t
_PyTime_DoubleToTimet(double x)
{
time_t result;
double diff;
result = (time_t)x;
/* How much info did we lose? time_t may be an integral or
* floating type, and we don't know which. If it's integral,
* we don't know whether C truncates, rounds, returns the floor,
* etc. If we lost a second or more, the C rounding is
* unreasonable, or the input just doesn't fit in a time_t;
* call it an error regardless. Note that the original cast to
* time_t can cause a C error too, but nothing we can do to
* work around that.
*/
diff = x - (double)result;
if (diff <= -1.0 || diff >= 1.0) {
PyErr_SetString(PyExc_ValueError,
"timestamp out of range for platform time_t");
result = (time_t)-1;
}
return result;
}