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from .exceptions import ColumnTypeMismatchException
from .base import FormatColumn
from .largeint import (
int128_from_quads, int128_to_quads, uint128_from_quads, uint128_to_quads,
int256_from_quads, int256_to_quads, uint256_from_quads, uint256_to_quads
)
class IntColumn(FormatColumn):
py_types = (int, )
int_size = None
def __init__(self, types_check=False, **kwargs):
super(IntColumn, self).__init__(types_check=types_check, **kwargs)
if types_check:
self.mask = (1 << 8 * self.int_size) - 1
# Chop only bytes that fit current type.
# ctypes.c_intXX is slower.
def before_write_items(items, nulls_map=None):
# TODO: cythonize
null_value = self.null_value
for i, item in enumerate(items):
if nulls_map and nulls_map[i]:
items[i] = null_value
continue
if item >= 0:
sign = 1
else:
sign = -1
item = -item
items[i] = sign * (item & self.mask)
self.before_write_items = before_write_items
class UIntColumn(IntColumn):
def __init__(self, types_check=False, **kwargs):
super(UIntColumn, self).__init__(types_check=types_check, **kwargs)
if types_check:
def check_item(value):
if value < 0:
raise ColumnTypeMismatchException(value)
self.check_item = check_item
class Int8Column(IntColumn):
ch_type = 'Int8'
format = 'b'
int_size = 1
class Int16Column(IntColumn):
ch_type = 'Int16'
format = 'h'
int_size = 2
class Int32Column(IntColumn):
ch_type = 'Int32'
format = 'i'
int_size = 4
class Int64Column(IntColumn):
ch_type = 'Int64'
format = 'q'
int_size = 8
class UInt8Column(UIntColumn):
ch_type = 'UInt8'
format = 'B'
int_size = 1
class UInt16Column(UIntColumn):
ch_type = 'UInt16'
format = 'H'
int_size = 2
class UInt32Column(UIntColumn):
ch_type = 'UInt32'
format = 'I'
int_size = 4
class UInt64Column(UIntColumn):
ch_type = 'UInt64'
format = 'Q'
int_size = 8
class LargeIntColumn(IntColumn):
format = 'Q' # We manually deal with sign in read/write.
factor = None
to_quads = None
from_quads = None
def write_items(self, items, buf):
n_items = len(items)
s = self.make_struct(self.factor * n_items)
uint_64_pairs = self.to_quads(items, n_items)
buf.write(s.pack(*uint_64_pairs))
def read_items(self, n_items, buf):
s = self.make_struct(self.factor * n_items)
items = s.unpack(buf.read(s.size))
return self.from_quads(items, n_items)
class Int128Column(LargeIntColumn):
ch_type = 'Int128'
int_size = 16
factor = 2
to_quads = int128_to_quads
from_quads = int128_from_quads
class UInt128Column(LargeIntColumn):
ch_type = 'UInt128'
int_size = 16
factor = 2
to_quads = uint128_to_quads
from_quads = uint128_from_quads
class Int256Column(LargeIntColumn):
ch_type = 'Int256'
int_size = 32
factor = 4
to_quads = int256_to_quads
from_quads = int256_from_quads
class UInt256Column(LargeIntColumn):
ch_type = 'UInt256'
int_size = 32
factor = 4
to_quads = uint256_to_quads
from_quads = uint256_from_quads
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