func (s *scalar) SetInt64(v int64) abstract.Scalar {
vl := C.long(v)
if int64(vl) != v {
panic("Oops, int64 initializer doesn't fit into C.ulong")
}
var z C.mpz_t
C.mpz_init(&z[0])
C.mpz_set_si(&z[0], vl)
C.element_set_mpz(&s.e[0], &z[0])
C.mpz_clear(&z[0])
return s
}
// SetInt64 sets z to x and returns z.
func (z *Int) SetInt64(x int64) *Int {
z.doinit()
// Test for truncation
y := C.long(x)
if int64(y) == x {
C.mpz_set_si(&z.i[0], y)
} else {
negative := false
if x < 0 {
x = -x
negative = true
}
C.mpz_import(&z.i[0], 1, 0, 8, 0, 0, unsafe.Pointer(&x))
if negative {
C.mpz_neg(&z.i[0], &z.i[0])
}
}
return z
}
// SetInt64 sets z = x and returns z.
func (z *Int) SetInt64(x int64) *Int {
z.doinit()
// TODO(rsc): more work on 32-bit platforms
C.mpz_set_si(&z.i[0], C.long(x))
return z
}