diff options
| -rw-r--r-- | Python/pytime.c | 113 |
1 files changed, 65 insertions, 48 deletions
diff --git a/Python/pytime.c b/Python/pytime.c index 02a93749c7..17ef197225 100644 --- a/Python/pytime.c +++ b/Python/pytime.c @@ -61,43 +61,51 @@ _PyLong_FromTime_t(time_t t) } static int -_PyTime_ObjectToDenominator(PyObject *obj, time_t *sec, long *numerator, +_PyTime_DoubleToDenominator(double d, time_t *sec, long *numerator, double denominator, _PyTime_round_t round) { - assert(denominator <= LONG_MAX); - if (PyFloat_Check(obj)) { - double d, intpart, err; - /* volatile avoids unsafe optimization on float enabled by gcc -O3 */ - volatile double floatpart; + double intpart, err; + /* volatile avoids unsafe optimization on float enabled by gcc -O3 */ + volatile double floatpart; + + floatpart = modf(d, &intpart); + if (floatpart < 0) { + floatpart = 1.0 + floatpart; + intpart -= 1.0; + } - d = PyFloat_AsDouble(obj); - floatpart = modf(d, &intpart); - if (floatpart < 0) { - floatpart = 1.0 + floatpart; - intpart -= 1.0; + floatpart *= denominator; + if (round == _PyTime_ROUND_CEILING) { + floatpart = ceil(floatpart); + if (floatpart >= denominator) { + floatpart = 0.0; + intpart += 1.0; } + } + else { + floatpart = floor(floatpart); + } - floatpart *= denominator; - if (round == _PyTime_ROUND_CEILING) { - floatpart = ceil(floatpart); - if (floatpart >= denominator) { - floatpart = 0.0; - intpart += 1.0; - } - } - else { - floatpart = floor(floatpart); - } + *sec = (time_t)intpart; + err = intpart - (double)*sec; + if (err <= -1.0 || err >= 1.0) { + error_time_t_overflow(); + return -1; + } - *sec = (time_t)intpart; - err = intpart - (double)*sec; - if (err <= -1.0 || err >= 1.0) { - error_time_t_overflow(); - return -1; - } + *numerator = (long)floatpart; + return 0; +} - *numerator = (long)floatpart; - return 0; +static int +_PyTime_ObjectToDenominator(PyObject *obj, time_t *sec, long *numerator, + double denominator, _PyTime_round_t round) +{ + assert(denominator <= LONG_MAX); + if (PyFloat_Check(obj)) { + double d = PyFloat_AsDouble(obj); + return _PyTime_DoubleToDenominator(d, sec, numerator, + denominator, round); } else { *sec = _PyLong_AsTime_t(obj); @@ -221,29 +229,38 @@ _PyTime_FromTimeval(_PyTime_t *tp, struct timeval *tv, int raise) #endif static int +_PyTime_FromFloatObject(_PyTime_t *t, double value, _PyTime_round_t round, + long to_nanoseconds) +{ + /* volatile avoids unsafe optimization on float enabled by gcc -O3 */ + volatile double d, err; + + /* convert to a number of nanoseconds */ + d = value; + d *= to_nanoseconds; + + if (round == _PyTime_ROUND_CEILING) + d = ceil(d); + else + d = floor(d); + + *t = (_PyTime_t)d; + err = d - (double)*t; + if (fabs(err) >= 1.0) { + _PyTime_overflow(); + return -1; + } + return 0; +} + +static int _PyTime_FromObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round, long to_nanoseconds) { if (PyFloat_Check(obj)) { - /* volatile avoids unsafe optimization on float enabled by gcc -O3 */ - volatile double d, err; - - /* convert to a number of nanoseconds */ + double d; d = PyFloat_AsDouble(obj); - d *= to_nanoseconds; - - if (round == _PyTime_ROUND_CEILING) - d = ceil(d); - else - d = floor(d); - - *t = (_PyTime_t)d; - err = d - (double)*t; - if (fabs(err) >= 1.0) { - _PyTime_overflow(); - return -1; - } - return 0; + return _PyTime_FromFloatObject(t, d, round, to_nanoseconds); } else { #ifdef HAVE_LONG_LONG |