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# Copyright (C) 2015 Chintalagiri Shashank # # This file is part of Tendril. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """ This file is part of tendril See the COPYING, README, and INSTALL files for more information """
from decimal import Decimal from decimal import InvalidOperation
from unitbase import UnitBase from unitbase import NumericalUnitBase from unitbase import Percentage from unitbase import GainBase from unitbase import parse_none
def parse_resistance(value): num_val = Decimal(value[:-1]) ostr = value[-1:] if ostr == 'm': return num_val / 1000 elif ostr == 'E': return num_val elif ostr == 'K': return num_val * 1000 elif ostr == 'M': return num_val * 1000 * 1000
def parse_capacitance(value): num_val = Decimal(value[:-2]) ostr = value[-2:] if ostr == 'pF': return num_val / 1000 elif ostr == 'nF': return num_val elif ostr == 'uF': return num_val * 1000 elif ostr == 'mF': return num_val * 1000 * 1000
def parse_voltage(value): value = value.strip()
try: num_val = Decimal(value[:-1]) ostr = value[-1:] except InvalidOperation: num_val = Decimal(value[:-2]) ostr = value[-2:]
if ostr == 'V': return num_val elif ostr == 'mV': return num_val / 1000 elif ostr == 'uV': return num_val / 1000000 elif ostr == 'nV': return num_val / 1000000000 elif ostr == 'pV': return num_val / 1000000000000 elif ostr == 'kV': return num_val * 1000 else: raise ValueError
def parse_current(value): value = value.strip() try: num_val = Decimal(value[:-1]) ostr = value[-1:] except InvalidOperation: num_val = Decimal(value[:-2]) ostr = value[-2:]
if ostr == 'A': return num_val * 1000 elif ostr == 'mA': return num_val elif ostr == 'uA': return num_val / 1000 elif ostr == 'nA': return num_val / 1000000 elif ostr == 'pA': return num_val / 1000000000 elif ostr == 'fA': return num_val / 1000000000000 else: raise ValueError
def parse_dbm(value): num_val = Decimal(value[:-3]) ostr = value[-3:] if ostr == 'dBm': return num_val
def parse_hfe(value): num_val = Decimal(value[:-3]) ostr = value[-3:] if ostr == 'HFE': return num_val
class Resistance(NumericalUnitBase): def __init__(self, value): _ostrs = ['m', 'E', 'K', 'M'] _dostr = 'E' _parse_func = parse_resistance super(Resistance, self).__init__(value, _ostrs, _dostr, _parse_func)
class Capacitance(NumericalUnitBase): def __init__(self, value): _ostrs = ['pF', 'nF', 'uF', 'mF'] _dostr = 'nF' _parse_func = parse_capacitance super(Capacitance, self).__init__(value, _ostrs, _dostr, _parse_func)
class Voltage(NumericalUnitBase): def __init__(self, value): _ostrs = ['pV', 'nV', 'uV', 'mV', 'V', 'kV'] _dostr = 'V' _parse_func = parse_voltage super(Voltage, self).__init__(value, _ostrs, _dostr, _parse_func)
class VoltageAC(Voltage): pass
class VoltageDC(Voltage): pass
class DiodeVoltageDC(VoltageDC): pass
class Current(NumericalUnitBase): def __init__(self, value): _ostrs = ['fA', 'pA', 'nA', 'uA', 'mA', 'A'] _dostr = 'mA' _parse_func = parse_current super(Current, self).__init__(value, _ostrs, _dostr, _parse_func)
class CurrentAC(Current): pass
class CurrentDC(Current): pass
def parse_voltage_gain(value): try: return Decimal(value) except InvalidOperation: if value.endswith('V/V'): return Decimal(value[:-3]) elif value.endswith('dB'): v = Decimal(value[:-2]) return 10 ** (v/20) else: raise ValueError( "Unrecognized string for VoltageGain : " + value )
class VoltageGain(GainBase): def __init__(self, value): _gtype = Voltage _ostrs = ['V/V'] _dostr = 'V/V' _parse_func = parse_voltage_gain super(VoltageGain, self).__init__( value, _ostrs, _dostr, _parse_func, _gtype )
class PowerRatio(NumericalUnitBase): def __init__(self, value): _ostrs = ['dBm'] _dostr = 'dBm' _parse_func = parse_dbm super(PowerRatio, self).__init__(value, _ostrs, _dostr, _parse_func)
def __repr__(self): return str(self._value) + self._dostr
class HFE(UnitBase): def __init__(self, value): _dostr = 'HFE' _parse_func = parse_hfe super(HFE, self).__init__(value, _dostr, _parse_func)
def __repr__(self): return str(self._value) + self._dostr
class Continuity(UnitBase): def __init__(self, value): _dostr = None _parse_func = parse_none super(Continuity, self).__init__(value, _dostr, _parse_func)
def __repr__(self): return str(self._value)
class DutyCycle(Percentage): pass |