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+# Copyright (c) 2005 The Regents of The University of Michigan
+# 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.
+
+# metric prefixes
+exa = 1.0e18
+peta = 1.0e15
+tera = 1.0e12
+giga = 1.0e9
+mega = 1.0e6
+kilo = 1.0e3
+
+milli = 1.0e-3
+micro = 1.0e-6
+nano = 1.0e-9
+pico = 1.0e-12
+femto = 1.0e-15
+atto = 1.0e-18
+
+# power of 2 prefixes
+kibi = 1024
+mebi = kibi * 1024
+gibi = mebi * 1024
+tebi = gibi * 1024
+pebi = tebi * 1024
+exbi = pebi * 1024
+
+# memory size configuration stuff
+def toFloat(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('Ei'):
+ return float(value[:-2]) * exbi
+ elif value.endswith('Pi'):
+ return float(value[:-2]) * pebi
+ elif value.endswith('Ti'):
+ return float(value[:-2]) * tebi
+ elif value.endswith('Gi'):
+ return float(value[:-2]) * gibi
+ elif value.endswith('Mi'):
+ return float(value[:-2]) * mebi
+ elif value.endswith('ki'):
+ return float(value[:-2]) * kibi
+ elif value.endswith('E'):
+ return float(value[:-1]) * exa
+ elif value.endswith('P'):
+ return float(value[:-1]) * peta
+ elif value.endswith('T'):
+ return float(value[:-1]) * tera
+ elif value.endswith('G'):
+ return float(value[:-1]) * giga
+ elif value.endswith('M'):
+ return float(value[:-1]) * mega
+ elif value.endswith('k'):
+ return float(value[:-1]) * kilo
+ elif value.endswith('m'):
+ return float(value[:-1]) * milli
+ elif value.endswith('u'):
+ return float(value[:-1]) * micro
+ elif value.endswith('n'):
+ return float(value[:-1]) * nano
+ elif value.endswith('p'):
+ return float(value[:-1]) * pico
+ elif value.endswith('f'):
+ return float(value[:-1]) * femto
+ else:
+ return float(value)
+
+def toInteger(value):
+ value = toFloat(value)
+ result = long(value)
+ if value != result:
+ raise ValueError, "cannot convert '%s' to integer" % value
+
+ return result
+
+_bool_dict = {
+ 'true' : True, 't' : True, 'yes' : True, 'y' : True, '1' : True,
+ 'false' : False, 'f' : False, 'no' : False, 'n' : False, '0' : False
+ }
+
+def toBool(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ value = value.lower()
+ result = _bool_dict.get(value, None)
+ if result == None:
+ raise ValueError, "cannot convert '%s' to bool" % value
+ return result
+
+def toFrequency(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('THz'):
+ return float(value[:-3]) * tera
+ elif value.endswith('GHz'):
+ return float(value[:-3]) * giga
+ elif value.endswith('MHz'):
+ return float(value[:-3]) * mega
+ elif value.endswith('kHz'):
+ return float(value[:-3]) * kilo
+ elif value.endswith('Hz'):
+ return float(value[:-2])
+
+ raise ValueError, "cannot convert '%s' to frequency" % value
+
+def toLatency(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('ps'):
+ return float(value[:-2]) * pico
+ elif value.endswith('ns'):
+ return float(value[:-2]) * nano
+ elif value.endswith('us'):
+ return float(value[:-2]) * micro
+ elif value.endswith('ms'):
+ return float(value[:-2]) * milli
+ elif value.endswith('s'):
+ return float(value[:-1])
+
+ raise ValueError, "cannot convert '%s' to latency" % value
+
+def toClockPeriod(value):
+ """result is a clock period"""
+
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ try:
+ val = toFrequency(value)
+ if val != 0:
+ val = 1 / val
+ return val
+ except ValueError:
+ pass
+
+ try:
+ val = toLatency(value)
+ return val
+ except ValueError:
+ pass
+
+ raise ValueError, "cannot convert '%s' to clock period" % value
+
+
+def toNetworkBandwidth(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('Tbps'):
+ return float(value[:-4]) * tera
+ elif value.endswith('Gbps'):
+ return float(value[:-4]) * giga
+ elif value.endswith('Mbps'):
+ return float(value[:-4]) * mega
+ elif value.endswith('kbps'):
+ return float(value[:-4]) * kilo
+ elif value.endswith('bps'):
+ return float(value[:-3])
+ else:
+ return float(value)
+
+ raise ValueError, "cannot convert '%s' to network bandwidth" % value
+
+def toMemoryBandwidth(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('PB/s'):
+ return float(value[:-4]) * pebi
+ elif value.endswith('TB/s'):
+ return float(value[:-4]) * tebi
+ elif value.endswith('GB/s'):
+ return float(value[:-4]) * gibi
+ elif value.endswith('MB/s'):
+ return float(value[:-4]) * mebi
+ elif value.endswith('kB/s'):
+ return float(value[:-4]) * kibi
+ elif value.endswith('B/s'):
+ return float(value[:-3])
+
+ raise ValueError, "cannot convert '%s' to memory bandwidth" % value
+
+def toMemorySize(value):
+ if not isinstance(value, str):
+ raise TypeError, "wrong type '%s' should be str" % type(value)
+
+ if value.endswith('PB'):
+ return long(value[:-2]) * pebi
+ elif value.endswith('TB'):
+ return long(value[:-2]) * tebi
+ elif value.endswith('GB'):
+ return long(value[:-2]) * gibi
+ elif value.endswith('MB'):
+ return long(value[:-2]) * mebi
+ elif value.endswith('kB'):
+ return long(value[:-2]) * kibi
+ elif value.endswith('B'):
+ return long(value[:-1])
+
+ raise ValueError, "cannot convert '%s' to memory size" % value
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