906 double_round(double x, int ndigits) {  in double_round()  argument
917     buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);  in double_round()
964 double_round(double x, int ndigits) {  in double_round()  argument
966     if (ndigits >= 0) {  in double_round()
967         if (ndigits > 22) {  in double_round()
970             pow1 = pow(10.0, (double)(ndigits-22));  in double_round()
974             pow1 = pow(10.0, (double)ndigits);  in double_round()
983         pow1 = pow(10.0, (double)-ndigits);  in double_round()
993     if (ndigits >= 0)  in double_round()
1028     Py_ssize_t ndigits;  in float___round___impl()  local
1042     ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);  in float___round___impl()
1043     if (ndigits == -1 && PyErr_Occurred())  in float___round___impl()
1055     if (ndigits > NDIGITS_MAX)  in float___round___impl()
1058     else if (ndigits < NDIGITS_MIN)  in float___round___impl()
1063         return double_round(x, (int)ndigits);  in float___round___impl()
1262     Py_ssize_t length, ndigits, fdigits, i;  in float_fromhex()  local
1362     ndigits = coeff_end - coeff_start;  in float_fromhex()
1364     if (ndigits == 0)  in float_fromhex()
1366     if (ndigits > Py_MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,  in float_fromhex()
1396     while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)  in float_fromhex()
1397         ndigits--;  in float_fromhex()
1398     if (ndigits == 0 || exp < LONG_MIN/2) {  in float_fromhex()
1409     top_exp = exp + 4*((long)ndigits - 1);  in float_fromhex()
1410     for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)  in float_fromhex()
1428         for (i = ndigits-1; i >= 0; i--)  in float_fromhex()
1437     for (i = ndigits-1; i > key_digit; i--)  in float_fromhex()