def write_8bitfloat(self, f, mantissabits=5, zeroexp=2):
"""Writes a byte-sized representation of floating point value f to the
wrapped file.
:param mantissabits: the number of bits to use for the mantissa
(with the rest used for the exponent).
:param zeroexp: the zero point for the exponent.
"""
self.write_byte(float_to_byte(f, mantissabits, zeroexp))
def write_8bitfloat(self, f, mantissabits=5, zeroexp=2):
"""Writes a byte-sized representation of floating point value f to the
wrapped file.
:param mantissabits: the number of bits to use for the mantissa
(with the rest used for the exponent).
:param zeroexp: the zero point for the exponent.
"""
self.write_byte(float_to_byte(f, mantissabits, zeroexp))
def encode(self, posns_boosts):
# posns_boosts = [(pos, boost), ...]
codes = []
base = 0
summedboost = 0
for pos, boost in posns_boosts:
summedboost += boost
codes.extend((varint(pos - base), float_to_byte(boost)))
base = pos
return pack("!If", len(posns_boosts), summedboost) + "".join(codes)
def encode(self, posns_boosts):
# posns_boosts = [(pos, boost), ...]
codes = []
base = 0
summedboost = 0
for pos, boost in posns_boosts:
summedboost += boost
codes.extend((varint(pos - base), float_to_byte(boost)))
base = pos
return pack("!If", len(posns_boosts), summedboost) + "".join(codes)
def encode(self, posns_chars_boosts):
# posns_chars_boosts = [(pos, startchar, endchar, boost), ...]
codes = []
posbase = 0
charbase = 0
summedboost = 0
for pos, startchar, endchar, boost in posns_chars_boosts:
summedboost += boost
codes.append(varint(pos - posbase))
posbase = pos
codes.extend((varint(startchar - charbase),
varint(endchar - startchar), float_to_byte(boost)))
charbase = endchar
b = pack("!If", len(posns_chars_boosts), summedboost)
return b + "".join(codes)
def encode(self, posns_chars_boosts):
# posns_chars_boosts = [(pos, startchar, endchar, boost), ...]
codes = []
posbase = 0
charbase = 0
summedboost = 0
for pos, startchar, endchar, boost in posns_chars_boosts:
summedboost += boost
codes.append(varint(pos - posbase))
posbase = pos
codes.extend((varint(startchar - charbase),
varint(endchar - startchar),
float_to_byte(boost)))
charbase = endchar
b = pack("!If", len(posns_chars_boosts), summedboost)
return b + "".join(codes)
def encode(self, freq_docboost):
freq, docboost = freq_docboost
return pack("!I", freq) + float_to_byte(docboost)
def encode(self, freq_docboost):
freq, docboost = freq_docboost
return pack("!I", freq) + float_to_byte(docboost)