def _unpack(self, execute=EX_CONSTRUCT):
typ, n, obj = self._read_header(execute)
if execute == EX_READ_ARRAY_HEADER:
if typ != TYPE_ARRAY:
raise UnpackValueError("Expected array")
return n
if execute == EX_READ_MAP_HEADER:
if typ != TYPE_MAP:
raise UnpackValueError("Expected map")
return n
# TODO should we eliminate the recursion?
if typ == TYPE_ARRAY:
if execute == EX_SKIP:
for i in range(n):
# TODO check whether we need to call `list_hook`
self._unpack(EX_SKIP)
return
ret = newlist_hint(n)
for i in range(n):
ret.append(self._unpack(EX_CONSTRUCT))
if self._list_hook is not None:
ret = self._list_hook(ret)
# TODO is the interaction between `list_hook` and `use_list` ok?
return ret if self._use_list else tuple(ret)
if typ == TYPE_MAP:
if execute == EX_SKIP:
for i in range(n):
# TODO check whether we need to call hooks
self._unpack(EX_SKIP)
self._unpack(EX_SKIP)
return
if self._object_pairs_hook is not None:
ret = self._object_pairs_hook(
(self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT))
for _ in range(n))
else:
ret = {}
for _ in range(n):
key = self._unpack(EX_CONSTRUCT)
ret[key] = self._unpack(EX_CONSTRUCT)
if self._object_hook is not None:
ret = self._object_hook(ret)
return ret
if execute == EX_SKIP:
return
if typ == TYPE_RAW:
if self._encoding is not None:
obj = obj.decode(self._encoding, self._unicode_errors)
elif self._raw:
obj = bytes(obj)
else:
obj = obj.decode('utf_8')
return obj
if typ == TYPE_EXT:
return self._ext_hook(n, bytes(obj))
if typ == TYPE_BIN:
return bytes(obj)
assert typ == TYPE_IMMEDIATE
return obj
def row(fileIter, lencols, compression, level):
if hasattr(sys, 'pypy_version_info'):
from __pypy__ import newlist_hint
else:
newlist_hint = lambda size: []
try:
import msgpack
except ImportError:
import marshal as msgpack
serializer = msgpack
exitGen = False
while not exitGen:
mrows = newlist_hint(lencols)
if lencols == 0:
(yield)
try:
for i in xrange(lencols):
mrows.append((yield))
except GeneratorExit:
exitGen = True
output = StringIO.StringIO()
colnum = len(schema)
output.truncate(0)
output.write(struct.pack('!B', 1))
output.write(struct.pack('!B', 0))
headindex = [0 for _ in xrange((colnum * 2) + 1)]
type = '!' + 'i' * len(headindex)
output.write(struct.pack(type, *headindex))
output.write(serializer.dumps(mrows))
fileIter.write(output.getvalue())
def _unpack(self, execute=EX_CONSTRUCT):
typ, n, obj = self._read_header(execute)
if execute == EX_READ_ARRAY_HEADER:
if typ != TYPE_ARRAY:
raise UnpackValueError("Expected array")
return n
if execute == EX_READ_MAP_HEADER:
if typ != TYPE_MAP:
raise UnpackValueError("Expected map")
return n
# TODO should we eliminate the recursion?
if typ == TYPE_ARRAY:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call `list_hook`
self._unpack(EX_SKIP)
return
ret = newlist_hint(n)
for i in xrange(n):
ret.append(self._unpack(EX_CONSTRUCT))
if self._list_hook is not None:
ret = self._list_hook(ret)
# TODO is the interaction between `list_hook` and `use_list` ok?
return ret if self._use_list else tuple(ret)
if typ == TYPE_MAP:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call hooks
self._unpack(EX_SKIP)
self._unpack(EX_SKIP)
return
if self._object_pairs_hook is not None:
ret = self._object_pairs_hook(
(self._unpack(EX_CONSTRUCT),
self._unpack(EX_CONSTRUCT))
for _ in xrange(n))
else:
ret = {}
for _ in xrange(n):
key = self._unpack(EX_CONSTRUCT)
ret[key] = self._unpack(EX_CONSTRUCT)
if self._object_hook is not None:
ret = self._object_hook(ret)
return ret
if execute == EX_SKIP:
return
if typ == TYPE_RAW:
if self._encoding is not None:
obj = obj.decode(self._encoding, self._unicode_errors)
else:
obj = bytes(obj)
return obj
if typ == TYPE_EXT:
return self._ext_hook(n, bytes(obj))
if typ == TYPE_BIN:
return bytes(obj)
assert typ == TYPE_IMMEDIATE
return obj
def _filter_tuple(func, seq):
length = len(seq)
result = newlist_hint(length)
for i in range(length):
# Again, must call __getitem__, at least there are tests.
item = seq[i]
if func(item):
result.append(item)
return tuple(result)
def __fetch_one_row(self):
num_cols = _lib.sqlite3_data_count(self.__statement._statement)
row = newlist_hint(num_cols)
for i in xrange(num_cols):
if self.__connection._detect_types:
converter = self.__row_cast_map[i]
else:
converter = None
if converter is not None:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
if not blob:
val = None
else:
blob_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _ffi.buffer(blob, blob_len)[:]
val = converter(val)
else:
typ = _lib.sqlite3_column_type(self.__statement._statement, i)
if typ == _lib.SQLITE_NULL:
val = None
elif typ == _lib.SQLITE_INTEGER:
val = _lib.sqlite3_column_int64(
self.__statement._statement, i)
val = int(val)
elif typ == _lib.SQLITE_FLOAT:
val = _lib.sqlite3_column_double(
self.__statement._statement, i)
elif typ == _lib.SQLITE_TEXT:
text = _lib.sqlite3_column_text(
self.__statement._statement, i)
text_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _ffi.buffer(text, text_len)[:]
try:
val = self.__connection.text_factory(val)
except Exception:
column_name = _lib.sqlite3_column_name(
self.__statement._statement, i)
if column_name:
column_name = _ffi.string(column_name).decode(
'utf-8')
else:
column_name = "<unknown column name>"
val = val.decode('ascii', 'replace')
raise OperationalError(
"Could not decode to UTF-8 column '%s' with text '%s'"
% (column_name, val))
elif typ == _lib.SQLITE_BLOB:
blob = _lib.sqlite3_column_blob(
self.__statement._statement, i)
blob_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _BLOB_TYPE(_ffi.buffer(blob, blob_len)[:])
row.append(val)
return tuple(row)
def _filter_string(func, string, str_type):
if func is bool and type(string) is str_type:
return string
length = len(string)
result = newlist_hint(length)
for i in range(length):
# You must call __getitem__ on the strings, simply iterating doesn't
# work :/
item = string[i]
if func(item):
if not isinstance(item, str_type):
raise TypeError("__getitem__ returned a non-string type")
result.append(item)
return str_type().join(result)
def __fetch_one_row(self):
num_cols = _lib.sqlite3_data_count(self.__statement._statement)
row = newlist_hint(num_cols)
for i in xrange(num_cols):
if self.__connection._detect_types:
converter = self.__row_cast_map[i]
else:
converter = None
if converter is not None:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
if not blob:
val = None
else:
blob_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _ffi.buffer(blob, blob_len)[:]
val = converter(val)
else:
typ = _lib.sqlite3_column_type(self.__statement._statement, i)
if typ == _lib.SQLITE_NULL:
val = None
elif typ == _lib.SQLITE_INTEGER:
val = _lib.sqlite3_column_int64(self.__statement._statement, i)
val = int(val)
elif typ == _lib.SQLITE_FLOAT:
val = _lib.sqlite3_column_double(self.__statement._statement, i)
elif typ == _lib.SQLITE_TEXT:
text = _lib.sqlite3_column_text(self.__statement._statement, i)
text_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _ffi.buffer(text, text_len)[:]
try:
val = self.__connection.text_factory(val)
except Exception:
column_name = _lib.sqlite3_column_name(
self.__statement._statement, i)
if column_name:
column_name = _ffi.string(column_name).decode('utf-8')
else:
column_name = "<unknown column name>"
val = val.decode('ascii', 'replace')
raise OperationalError(
"Could not decode to UTF-8 column '%s' with text '%s'" % (
column_name, val))
elif typ == _lib.SQLITE_BLOB:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
blob_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _BLOB_TYPE(_ffi.buffer(blob, blob_len)[:])
row.append(val)
return tuple(row)
def __fetch_one_row(self):
num_cols = _lib.sqlite3_data_count(self.__statement._statement)
row = newlist_hint(num_cols)
for i in xrange(num_cols):
if self.__connection._detect_types:
converter = self.__row_cast_map[i]
else:
converter = None
if converter is not None:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
if not blob:
val = None
else:
blob_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _ffi.buffer(blob, blob_len)[:]
val = converter(val)
else:
typ = _lib.sqlite3_column_type(self.__statement._statement, i)
if typ == _lib.SQLITE_NULL:
val = None
elif typ == _lib.SQLITE_INTEGER:
val = _lib.sqlite3_column_int64(
self.__statement._statement, i)
val = int(val)
elif typ == _lib.SQLITE_FLOAT:
val = _lib.sqlite3_column_double(
self.__statement._statement, i)
elif typ == _lib.SQLITE_TEXT:
text = _lib.sqlite3_column_text(
self.__statement._statement, i)
text_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _ffi.buffer(text, text_len)[:]
val = self.__connection.text_factory(val)
elif typ == _lib.SQLITE_BLOB:
blob = _lib.sqlite3_column_blob(
self.__statement._statement, i)
blob_len = _lib.sqlite3_column_bytes(
self.__statement._statement, i)
val = _BLOB_TYPE(_ffi.buffer(blob, blob_len)[:])
row.append(val)
return tuple(row)
def __fetch_one_row(self):
num_cols = _lib.sqlite3_data_count(self.__statement._statement)
row = newlist_hint(num_cols)
for i in xrange(num_cols):
if self.__connection._detect_types:
converter = self.__row_cast_map[i]
else:
converter = None
if converter is not None:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
if not blob:
val = None
else:
blob_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _ffi.buffer(blob, blob_len)[:]
val = converter(val)
else:
typ = _lib.sqlite3_column_type(self.__statement._statement, i)
if typ == _lib.SQLITE_NULL:
val = None
elif typ == _lib.SQLITE_INTEGER:
val = _lib.sqlite3_column_int64(self.__statement._statement, i)
val = int(val)
elif typ == _lib.SQLITE_FLOAT:
val = _lib.sqlite3_column_double(self.__statement._statement, i)
elif typ == _lib.SQLITE_TEXT:
text = _lib.sqlite3_column_text(self.__statement._statement, i)
text_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _ffi.buffer(text, text_len)[:]
val = self.__connection.text_factory(val)
elif typ == _lib.SQLITE_BLOB:
blob = _lib.sqlite3_column_blob(self.__statement._statement, i)
blob_len = _lib.sqlite3_column_bytes(self.__statement._statement, i)
val = _BLOB_TYPE(_ffi.buffer(blob, blob_len)[:])
row.append(val)
return tuple(row)
def sorteddictpercol(fileIter, lencols, compression, level):
output = StringIO.StringIO()
if split:
output.write(struct.pack('!B', 0))
cPickle.dump(schema[1:], output, 1)
colnum = len(schema) - 1
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
else:
colnum = len(schema)
fileIter.write(struct.pack('!B', 0))
cPickle.dump(schema, fileIter, 1)
if hasattr(sys, 'pypy_version_info'):
from __pypy__ import newlist_hint
else:
newlist_hint = lambda size: []
paxcols = []
blocknum = 0
# tempio = cStringIO.StringIO()
# fastPickler = cPickle.Pickler(tempio, 2)
# fastPickler.fast = 1
exitGen = False
compress = zlib.compress
if compression == BZ2:
compress = bz2.compress
if lencols == 0:
(yield)
while not exitGen:
output.truncate(0)
mrows = newlist_hint(lencols)
try:
for i in xrange(lencols):
mrows.append((yield))
except GeneratorExit:
exitGen = True
count = len(mrows)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
headindex = [0 for _ in xrange((colnum * 2) + 1)]
type = '!' + 'i' * len(headindex)
output.write(struct.pack(type, *headindex))
if mrows != []:
for i, col in enumerate(
([x[c] for x in mrows] for c in xrange(colnum))):
if blocknum == 0:
s = sorted(set(col))
lens = len(s)
if lens > 50 * 1.0 * count / 100:
paxcols.append(i)
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(col)
output.write(compress(serializer.dumps(col),
level))
headindex[i * 2] = output.tell() - l
else:
coldict = dict(((x, y) for y, x in enumerate(s)))
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(s)
output.write(compress(serializer.dumps(s), level))
headindex[i * 2] = output.tell() - l
if lens > 1:
if lens < 256:
output.write(
compress(
array('B',
[coldict[y]
for y in col]).tostring(),
level))
else:
output.write(
compress(
array('H',
[coldict[y]
for y in col]).tostring(),
level))
headindex[i * 2 +
1] = output.tell() - l - headindex[i * 2]
else:
if i in paxcols:
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(col)
output.write(compress(serializer.dumps(col),
level))
headindex[i * 2] = output.tell() - l
else:
s = sorted(set(col))
lens = len(s)
coldict = dict(((x, y) for y, x in enumerate(s)))
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(s)
output.write(compress(serializer.dumps(s), level))
headindex[i * 2] = output.tell() - l
if lens > 1:
if lens < 256:
output.write(
compress(
array('B',
[coldict[y]
for y in col]).tostring(),
level))
else:
output.write(
compress(
array('H',
[coldict[y]
for y in col]).tostring(),
level))
headindex[i * 2 +
1] = output.tell() - l - headindex[i * 2]
blocknum = 1
headindex[colnum * 2] = count
output.seek(0)
type = '!' + 'i' * len(headindex)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
output.write(struct.pack(type, *headindex))
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
fileIter.close()
def _unpack(self, execute=EX_CONSTRUCT):
typ, n, obj = self._read_header(execute)
if execute == EX_READ_ARRAY_HEADER:
if typ != TYPE_ARRAY:
raise ValueError("Expected array")
return n
if execute == EX_READ_MAP_HEADER:
if typ != TYPE_MAP:
raise ValueError("Expected map")
return n
# TODO should we eliminate the recursion?
if typ == TYPE_ARRAY:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call `list_hook`
self._unpack(EX_SKIP)
return
ret = newlist_hint(n)
for i in xrange(n):
ret.append(self._unpack(EX_CONSTRUCT))
if self._list_hook is not None:
ret = self._list_hook(ret)
# TODO is the interaction between `list_hook` and `use_list` ok?
return ret if self._use_list else tuple(ret)
if typ == TYPE_MAP:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call hooks
self._unpack(EX_SKIP)
self._unpack(EX_SKIP)
return
if self._object_pairs_hook is not None:
ret = self._object_pairs_hook(
(self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT))
for _ in xrange(n)
)
else:
ret = {}
for _ in xrange(n):
key = self._unpack(EX_CONSTRUCT)
if self._strict_map_key and type(key) not in (unicode, bytes):
raise ValueError(
"%s is not allowed for map key" % str(type(key))
)
if not PY2 and type(key) is str:
key = sys.intern(key)
ret[key] = self._unpack(EX_CONSTRUCT)
if self._object_hook is not None:
ret = self._object_hook(ret)
return ret
if execute == EX_SKIP:
return
if typ == TYPE_RAW:
if self._raw:
obj = bytes(obj)
else:
obj = obj.decode("utf_8", self._unicode_errors)
return obj
if typ == TYPE_BIN:
return bytes(obj)
if typ == TYPE_EXT:
if n == -1: # timestamp
ts = Timestamp.from_bytes(bytes(obj))
if self._timestamp == 1:
return ts.to_unix()
elif self._timestamp == 2:
return ts.to_unix_nano()
elif self._timestamp == 3:
return ts.to_datetime()
else:
return ts
else:
return self._ext_hook(n, bytes(obj))
assert typ == TYPE_IMMEDIATE
return obj
def __init__(self, length_hint):
self.length_hint = length_hint
self.list = newlist_hint(length_hint)
def spac(fileIter, lencols, compression, level):
indexes_size = [0] * (len(schema) - 1)
values_size = [0] * (len(schema) - 1)
valcount = [0] * (len(schema) - 1)
output = StringIO.StringIO()
check = 0
globaldict = [None] * (len(schema) - 1)
index_init = [0 for _ in xrange(3)]
if split:
output.write(struct.pack('!B', 0))
cPickle.dump(schema[1:], output, 1)
colnum = len(schema) - 1
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
else:
colnum = len(schema)
fileIter.write(struct.pack('!B', 0))
cPickle.dump(schema, fileIter, 1)
if hasattr(sys, 'pypy_version_info'):
from __pypy__ import newlist_hint
else:
newlist_hint = lambda size: []
paxcols = []
blocknum = 0
# tempio = cStringIO.StringIO()
# fastPickler = cPickle.Pickler(tempio, 2)
# fastPickler.fast = 1
exitGen = False
compress = zlib.compress
compress2 = bz2.compress
if compression == BZ2:
compress = bz2.compress
if lencols == 0:
(yield)
while not exitGen:
output.truncate(0)
mrows = newlist_hint(lencols)
try:
for i in xrange(lencols):
mrows.append((yield))
except GeneratorExit:
exitGen = True
count = len(mrows)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
headindex = [0 for _ in xrange((colnum * 4) + 1)]
#headindex2 = [0 for _ in xrange(colnum*4)]
type = '!' + 'i' * len(headindex)
output.write(struct.pack(type, *headindex))
#type = '!'+'i'*len(headindex2)
#output.write(struct.pack(type, *headindex2))
if mrows != []:
for i, col in enumerate(
([x[c] for x in mrows] for c in xrange(colnum))):
if blocknum == 0:
globaldict[i] = sorted(set(col))
lens = len(globaldict[i])
if lens > 50 * 1.0 * count / 100:
paxcols.append(i)
l = output.tell()
headindex[i * 4 + 3] = l
output.write(compress(serializer.dumps(col),
level))
headindex[i * 4] = output.tell() - l
else:
coldict = dict(
((x, y) for y, x in enumerate(globaldict[i])))
l = output.tell()
headindex[i * 4 + 3] = l
output.write(
compress(serializer.dumps(globaldict[i]),
level))
valcount[i] += lens
headindex[i * 4] = output.tell() - l
values_size[i] += headindex[i * 4]
if lens > 1:
l1 = output.tell()
if lens < 256:
output.write(
compress(
array('B',
[coldict[y]
for y in col]).tostring(),
level))
elif lens < 65536:
output.write(
compress(
array('H',
[coldict[y]
for y in col]).tostring(),
level))
else:
print 'lala'
output.write(
compress(
array('i',
[coldict[y]
for y in col]).tostring(),
level))
indexes_size[i] += output.tell() - l1
headindex[i * 4 +
1] = output.tell() - l - headindex[i * 4]
else:
if i in paxcols:
l = output.tell()
headindex[i * 4 + 3] = l
output.write(compress(serializer.dumps(col),
level))
headindex[i * 4] = output.tell() - l
else:
so = sorted(set(col))
setcol = set(so)
diff = setcol - set(
globaldict[i]
) # upologismos newn diaforetikwn val
lens = len(globaldict[i])
if lens > 2147483647 or (
lens < 65535 and lens + len(diff) > 65535
) or (lens < 256 and lens + len(diff) >= 256
) or len(setcol) == 1 or (lens >= 256 and
len(setcol) < 256):
headindex[i * 4 + 2] = 0
# sdc again
globaldict[i] = so
coldict = dict(
((x, y)
for y, x in enumerate(globaldict[i])))
l = output.tell()
headindex[i * 4 + 3] = l
output.write(
compress(serializer.dumps(globaldict[i]),
level))
lens = len(globaldict[i])
headindex[i * 4] = output.tell() - l
valcount[i] += lens
values_size[i] += headindex[i * 3]
if lens > 1:
l1 = output.tell()
if lens < 256:
output.write(
compress(
array(
'B',
[coldict[y]
for y in col]).tostring(),
level))
elif lens < 65536:
output.write(
compress(
array(
'H',
[coldict[y]
for y in col]).tostring(),
level))
else:
output.write(
compress(
array(
'i',
[coldict[y]
for y in col]).tostring(),
level))
indexes_size[i] += output.tell() - l1
headindex[
i * 4 +
1] = output.tell() - l - headindex[i * 4]
else:
headindex[i * 4 + 2] = 1
dif = sorted(diff)
if dif:
globaldict[i] = globaldict[
i] + dif # upologismos neou global dict
#globaldict[i] = set(dif).union(globaldict[i])
d = 0
t = output.tell()
if len(globaldict[i]) != 0:
if len(globaldict[i]) < 256:
indextype = 'B'
elif len(globaldict[i]) < 65536:
indextype = 'H'
else:
print 'lala'
indextype = 'i'
l = output.tell()
headindex[i * 4 + 3] = l
output.write(
compress(serializer.dumps(dif), level))
valcount[i] += len(dif)
headindex[i * 4] = output.tell() - l
values_size[i] += headindex[i * 4]
lens = len(globaldict[i])
coldict = dict(
((x, y)
for y, x in enumerate(globaldict[i])))
l = output.tell()
if lens > 1:
l1 = output.tell()
output.write(
compress(
array(indextype,
[coldict[y]
for y in col]).tostring(),
level))
indexes_size[i] += output.tell() - l1
headindex[i * 4 + 1] = output.tell() - l
blocknum += 1
headindex[colnum * 4] = count
output.seek(0)
type = '!' + 'i' * len(headindex)
#type2 = '!'+'i'*len(headindex2)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
output.write(struct.pack(type, *headindex))
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
#print indexes_size
#print values_size
#print valcount
fileIter.close()
def sorteddictpercol(fileIter, lencols, compression, level):
output = StringIO.StringIO()
if split:
output.write(struct.pack('!B', 0))
cPickle.dump(schema[1:], output, 1)
colnum = len(schema) - 1
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
else:
colnum = len(schema)
fileIter.write(struct.pack('!B', 0))
cPickle.dump(schema, fileIter, 1)
if hasattr(sys, 'pypy_version_info'):
from __pypy__ import newlist_hint
else:
newlist_hint = lambda size: []
paxcols = []
blocknum = 0
# tempio = cStringIO.StringIO()
# fastPickler = cPickle.Pickler(tempio, 2)
# fastPickler.fast = 1
exitGen = False
compress = zlib.compress
if compression == BZ2:
compress = bz2.compress
if lencols == 0:
(yield)
while not exitGen:
output.truncate(0)
mrows = newlist_hint(lencols)
try:
for i in xrange(lencols):
mrows.append((yield))
except GeneratorExit:
exitGen = True
count = len(mrows)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
headindex = [0 for _ in xrange((colnum * 2) + 1)]
type = '!' + 'i' * len(headindex)
output.write(struct.pack(type, *headindex))
if mrows != []:
for i, col in enumerate(([x[c] for x in mrows] for c in xrange(colnum))):
if blocknum == 0:
s = sorted(set(col))
lens = len(s)
if lens > 50 * 1.0 * count / 100:
paxcols.append(i)
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(col)
output.write(compress(serializer.dumps(col), level))
headindex[i * 2] = output.tell() - l
else:
coldict = dict(((x, y) for y, x in enumerate(s)))
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(s)
output.write(compress(serializer.dumps(s), level))
headindex[i * 2] = output.tell() - l
if lens > 1:
if lens < 256:
output.write(compress(array('B', [coldict[y] for y in col]).tostring(), level))
else:
output.write(compress(array('H', [coldict[y] for y in col]).tostring(), level))
headindex[i * 2 + 1] = output.tell() - l - headindex[i * 2]
else:
if i in paxcols:
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(col)
output.write(compress(serializer.dumps(col), level))
headindex[i * 2] = output.tell() - l
else:
s = sorted(set(col))
lens = len(s)
coldict = dict(((x, y) for y, x in enumerate(s)))
l = output.tell()
# tempio.truncate(0)
# fastPickler.dump(s)
output.write(compress(serializer.dumps(s), level))
headindex[i * 2] = output.tell() - l
if lens > 1:
if lens < 256:
output.write(compress(array('B', [coldict[y] for y in col]).tostring(), level))
else:
output.write(compress(array('H', [coldict[y] for y in col]).tostring(), level))
headindex[i * 2 + 1] = output.tell() - l - headindex[i * 2]
blocknum = 1
headindex[colnum * 2] = count
output.seek(0)
type = '!' + 'i' * len(headindex)
output.write(struct.pack('!B', 1))
if compression == BZ2:
output.write(struct.pack('!B', 0))
else:
output.write(struct.pack('!B', 1))
output.write(struct.pack(type, *headindex))
cz = output.getvalue()
fileIter.write(struct.pack('!i', len(cz)))
fileIter.write(cz)
fileIter.close()
def _fb_unpack(self, execute=EX_CONSTRUCT, write_bytes=None):
typ = TYPE_IMMEDIATE
c = self._fb_read(1, write_bytes)
b = ord(c)
if b & 0b10000000 == 0:
obj = b
elif b & 0b11100000 == 0b11100000:
obj = struct.unpack("b", c)[0]
elif b & 0b11100000 == 0b10100000:
n = b & 0b00011111
obj = self._fb_read(n, write_bytes)
typ = TYPE_RAW
elif b & 0b11110000 == 0b10010000:
n = b & 0b00001111
typ = TYPE_ARRAY
elif b & 0b11110000 == 0b10000000:
n = b & 0b00001111
typ = TYPE_MAP
elif b == 0xc0:
obj = None
elif b == 0xc2:
obj = False
elif b == 0xc3:
obj = True
elif b == 0xca:
obj = struct.unpack(">f", self._fb_read(4, write_bytes))[0]
elif b == 0xcb:
obj = struct.unpack(">d", self._fb_read(8, write_bytes))[0]
elif b == 0xcc:
obj = struct.unpack("B", self._fb_read(1, write_bytes))[0]
elif b == 0xcd:
obj = struct.unpack(">H", self._fb_read(2, write_bytes))[0]
elif b == 0xce:
obj = struct.unpack(">I", self._fb_read(4, write_bytes))[0]
elif b == 0xcf:
obj = struct.unpack(">Q", self._fb_read(8, write_bytes))[0]
elif b == 0xd0:
obj = struct.unpack("b", self._fb_read(1, write_bytes))[0]
elif b == 0xd1:
obj = struct.unpack(">h", self._fb_read(2, write_bytes))[0]
elif b == 0xd2:
obj = struct.unpack(">i", self._fb_read(4, write_bytes))[0]
elif b == 0xd3:
obj = struct.unpack(">q", self._fb_read(8, write_bytes))[0]
elif b == 0xda:
n = struct.unpack(">H", self._fb_read(2, write_bytes))[0]
obj = self._fb_read(n, write_bytes)
typ = TYPE_RAW
elif b == 0xdb:
n = struct.unpack(">I", self._fb_read(4, write_bytes))[0]
obj = self._fb_read(n, write_bytes)
typ = TYPE_RAW
elif b == 0xdc:
n = struct.unpack(">H", self._fb_read(2, write_bytes))[0]
typ = TYPE_ARRAY
elif b == 0xdd:
n = struct.unpack(">I", self._fb_read(4, write_bytes))[0]
typ = TYPE_ARRAY
elif b == 0xde:
n = struct.unpack(">H", self._fb_read(2, write_bytes))[0]
typ = TYPE_MAP
elif b == 0xdf:
n = struct.unpack(">I", self._fb_read(4, write_bytes))[0]
typ = TYPE_MAP
else:
raise UnpackValueError("Unknown header: 0x%x" % b)
if execute == EX_READ_ARRAY_HEADER:
if typ != TYPE_ARRAY:
raise UnpackValueError("Expected array")
return n
if execute == EX_READ_MAP_HEADER:
if typ != TYPE_MAP:
raise UnpackValueError("Expected map")
return n
# TODO should we eliminate the recursion?
if typ == TYPE_ARRAY:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call `list_hook`
self._fb_unpack(EX_SKIP, write_bytes)
return
ret = newlist_hint(n)
for i in xrange(n):
ret.append(self._fb_unpack(EX_CONSTRUCT, write_bytes))
if self._list_hook is not None:
ret = self._list_hook(ret)
# TODO is the interaction between `list_hook` and `use_list` ok?
return ret if self._use_list else tuple(ret)
if typ == TYPE_MAP:
if execute == EX_SKIP:
for i in xrange(n):
# TODO check whether we need to call hooks
self._fb_unpack(EX_SKIP, write_bytes)
self._fb_unpack(EX_SKIP, write_bytes)
return
if self._object_pairs_hook is not None:
ret = self._object_pairs_hook(
(self._fb_unpack(EX_CONSTRUCT, write_bytes),
self._fb_unpack(EX_CONSTRUCT, write_bytes))
for _ in xrange(n)
)
else:
ret = {}
for _ in xrange(n):
key = self._fb_unpack(EX_CONSTRUCT, write_bytes)
ret[key] = self._fb_unpack(EX_CONSTRUCT, write_bytes)
if self._object_hook is not None:
ret = self._object_hook(ret)
return ret
if execute == EX_SKIP:
return
if typ == TYPE_RAW:
if self._encoding is not None:
obj = obj.decode(self._encoding, self._unicode_errors)
return obj
assert typ == TYPE_IMMEDIATE
return obj
def _unpack(self,
command: int = _CMD_CONSTRUCT,
data_type: typing.Optional[int] = None):
obj_type, n, obj, obj_dt = self._read_header(data_type)
# Type checking
if command == _CMD_READ_ARRAY_HEADER:
if obj_type != _TYPE_ARRAY and obj_type != _TYPE_MARRAY:
raise ValueError('Expected ARRAY')
return n
elif command == _CMD_READ_MAP_HEADER:
if obj_type != _TYPE_MAP:
raise ValueError('Expected MAP')
return n
# Unpacking ARRAY
if obj_type == _TYPE_ARRAY:
# Skip over every element in the ARRAY
if command == _CMD_SKIP:
for _ in range(n):
self._unpack(_CMD_SKIP)
return
ret = newlist_hint(n)
for _ in range(n):
ret.append(self._unpack(_CMD_CONSTRUCT, data_type=obj_dt))
if self._list_hook is not None:
ret = self._list_hook(ret)
return ret
# Unpacking MARRAY
elif obj_type == _TYPE_MARRAY:
if command == _CMD_SKIP:
for _ in range(n):
self._unpack(_CMD_SKIP)
return
ret = newlist_hint(n)
for _ in range(n):
ret.append(self._unpack(_CMD_CONSTRUCT))
if self._list_hook is not None:
ret = self._list_hook(ret)
return ret
# Unpacking MAP
elif obj_type == _TYPE_MAP:
if command == _CMD_SKIP:
for _ in range(n):
self._unpack(_CMD_SKIP)
self._unpack(_CMD_SKIP)
return
if self._object_pairs_hook is not None:
ret = self._object_pairs_hook((self._unpack(_CMD_CONSTRUCT),
self._unpack(_CMD_CONSTRUCT))
for _ in range(n))
else:
ret = {}
for _ in range(n):
key = self._unpack(_CMD_CONSTRUCT)
ret[key] = self._unpack(_CMD_CONSTRUCT)
if self._object_hook is not None:
ret = self._object_hook(ret)
return ret
if command == _CMD_SKIP:
return
# Unpacking STR
if obj_type == _TYPE_STR:
return obj.decode('utf-8')
# Unpacking BIN
elif obj_type == _TYPE_BIN:
return bytes(obj)
# Unpacking EXT
elif obj_type == _TYPE_EXT:
return self._ext_hook(n, bytes(obj))
# Unpacking INT
assert obj_type == _TYPE_IMMEDIATE
return obj
