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# Copyright (c) 2005 The Regents of The University of Michigan
# Copyright (c) 2010 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert
# Gabe Black
# metric prefixes
atto = 1.0e-18
femto = 1.0e-15
pico = 1.0e-12
nano = 1.0e-9
micro = 1.0e-6
milli = 1.0e-3
kilo = 1.0e3
mega = 1.0e6
giga = 1.0e9
tera = 1.0e12
peta = 1.0e15
exa = 1.0e18
# power of 2 prefixes
kibi = 1024
mebi = kibi * 1024
gibi = mebi * 1024
tebi = gibi * 1024
pebi = tebi * 1024
exbi = pebi * 1024
metric_prefixes = {
'Ei': exbi,
'E': exa,
'Pi': pebi,
'P': peta,
'Ti': tebi,
'T': tera,
'Gi': gibi,
'G': giga,
'M': mega,
'ki': kibi,
'k': kilo,
'Mi': mebi,
'm': milli,
'u': micro,
'n': nano,
'p': pico,
'f': femto,
'a': atto,
}
binary_prefixes = {
'Ei': exbi,
'E' : exbi,
'Pi': pebi,
'P' : pebi,
'Ti': tebi,
'T' : tebi,
'Gi': gibi,
'G' : gibi,
'Mi': mebi,
'M' : mebi,
'ki': kibi,
'k' : kibi,
}
def assertStr(value):
if not isinstance(value, str):
raise TypeError, "wrong type '%s' should be str" % type(value)
# memory size configuration stuff
def toFloat(value, target_type='float', units=None, prefixes=[]):
assertStr(value)
if units and not value.endswith(units):
units = None
if not units:
try:
return float(value)
except ValueError:
raise ValueError, "cannot convert '%s' to %s" % \
(value, target_type)
value = value[:-len(units)]
prefix = next((p for p in prefixes.keys() if value.endswith(p)), None)
if not prefix:
return float(value)
value = value[:-len(prefix)]
return float(value) * prefixes[prefix]
def toMetricFloat(value, target_type='float', units=None):
return toFloat(value, target_type, units, metric_prefixes)
def toBinaryFloat(value, target_type='float', units=None):
return toFloat(value, target_type, units, binary_prefixes)
def toInteger(value, target_type='integer', units=None, prefixes=[]):
value = toFloat(value, target_type, units, prefixes)
result = long(value)
if value != result:
raise ValueError, "cannot convert '%s' to integer %s" % \
(value, target_type)
return result
def toMetricInteger(value, target_type='integer', units=None):
return toInteger(value, target_type, units, metric_prefixes)
def toBinaryInteger(value, target_type='integer', units=None):
return toInteger(value, target_type, units, binary_prefixes)
def toBool(value):
assertStr(value)
value = value.lower()
if value in ('true', 't', 'yes', 'y', '1'):
return True
if value in ('false', 'f', 'no', 'n', '0'):
return False
return result
def toFrequency(value):
return toMetricFloat(value, 'frequency', 'Hz')
def toLatency(value):
return toMetricFloat(value, 'latency', 's')
def anyToLatency(value):
"""result is a clock period"""
try:
return 1 / toFrequency(value)
except ValueError, ZeroDivisionError:
pass
try:
return toLatency(value)
except ValueError:
pass
raise ValueError, "cannot convert '%s' to clock period" % value
def anyToFrequency(value):
"""result is a clock period"""
try:
return toFrequency(value)
except ValueError:
pass
try:
return 1 / toLatency(value)
except ValueError, ZeroDivisionError:
pass
raise ValueError, "cannot convert '%s' to clock period" % value
def toNetworkBandwidth(value):
return toMetricFloat(value, 'network bandwidth', 'bps')
def toMemoryBandwidth(value):
return toBinaryFloat(value, 'memory bandwidth', 'B/s')
def toMemorySize(value):
return toBinaryInteger(value, 'memory size', 'B')
def toIpAddress(value):
if not isinstance(value, str):
raise TypeError, "wrong type '%s' should be str" % type(value)
bytes = value.split('.')
if len(bytes) != 4:
raise ValueError, 'invalid ip address %s' % value
for byte in bytes:
if not 0 <= int(byte) <= 0xff:
raise ValueError, 'invalid ip address %s' % value
return (int(bytes[0]) << 24) | (int(bytes[1]) << 16) | \
(int(bytes[2]) << 8) | (int(bytes[3]) << 0)
def toIpNetmask(value):
if not isinstance(value, str):
raise TypeError, "wrong type '%s' should be str" % type(value)
(ip, netmask) = value.split('/')
ip = toIpAddress(ip)
netmaskParts = netmask.split('.')
if len(netmaskParts) == 1:
if not 0 <= int(netmask) <= 32:
raise ValueError, 'invalid netmask %s' % netmask
return (ip, int(netmask))
elif len(netmaskParts) == 4:
netmaskNum = toIpAddress(netmask)
if netmaskNum == 0:
return (ip, 0)
testVal = 0
for i in range(32):
testVal |= (1 << (31 - i))
if testVal == netmaskNum:
return (ip, i + 1)
raise ValueError, 'invalid netmask %s' % netmask
else:
raise ValueError, 'invalid netmask %s' % netmask
def toIpWithPort(value):
if not isinstance(value, str):
raise TypeError, "wrong type '%s' should be str" % type(value)
(ip, port) = value.split(':')
ip = toIpAddress(ip)
if not 0 <= int(port) <= 0xffff:
raise ValueError, 'invalid port %s' % port
return (ip, int(port))
def toVoltage(value):
return toMetricFloat(value, 'voltage', 'V')
def toCurrent(value):
return toMetricFloat(value, 'current', 'A')
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