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SickRage/lib/hachoir_core/text_handler.py

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"""
Utilities used to convert a field to human classic reprentation of data.
"""
from lib.hachoir_core.tools import (
humanDuration, humanFilesize, alignValue,
durationWin64 as doDurationWin64,
deprecated)
from types import FunctionType, MethodType
from lib.hachoir_core.field import Field
def textHandler(field, handler):
assert isinstance(handler, (FunctionType, MethodType))
assert issubclass(field.__class__, Field)
field.createDisplay = lambda: handler(field)
return field
def displayHandler(field, handler):
assert isinstance(handler, (FunctionType, MethodType))
assert issubclass(field.__class__, Field)
field.createDisplay = lambda: handler(field.value)
return field
@deprecated("Use TimedeltaWin64 field type")
def durationWin64(field):
"""
Convert Windows 64-bit duration to string. The timestamp format is
a 64-bit number: number of 100ns. See also timestampWin64().
>>> durationWin64(type("", (), dict(value=2146280000, size=64)))
u'3 min 34 sec 628 ms'
>>> durationWin64(type("", (), dict(value=(1 << 64)-1, size=64)))
u'58494 years 88 days 5 hours'
"""
assert hasattr(field, "value") and hasattr(field, "size")
assert field.size == 64
delta = doDurationWin64(field.value)
return humanDuration(delta)
def filesizeHandler(field):
"""
Format field value using humanFilesize()
"""
return displayHandler(field, humanFilesize)
def hexadecimal(field):
"""
Convert an integer to hexadecimal in lower case. Returns unicode string.
>>> hexadecimal(type("", (), dict(value=412, size=16)))
u'0x019c'
>>> hexadecimal(type("", (), dict(value=0, size=32)))
u'0x00000000'
"""
assert hasattr(field, "value") and hasattr(field, "size")
size = field.size
padding = alignValue(size, 4) // 4
pattern = u"0x%%0%ux" % padding
return pattern % field.value