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#!/usr/bin/env python
#
# Public Domain 2014-2019 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_intpack.py
# Tests integer packing using public methods
#
import wiredtiger, wttest
from wtscenario import make_scenarios
class PackTester:
def __init__(self, formatcode, validlow, validhigh, equals):
self.formatcode = formatcode
self.validlow = validlow
self.validhigh = validhigh
self.recno = 1
self.forw = None # r -> code
self.forw_idx = None # code -> r
self.back = None # code -> r
self.back_idx = None # r -> code
self.session = None
self.equals = equals
self.forw_uri = None
self.back_uri = None
self.forw_idx_uri = None
self.back_idx_uri = None
def initialize(self, session):
self.session = session
pfx = 'test_intpack_'
x = self.formatcode
if x.isupper():
x = x + '_' # differentiate upper case from lower case in our naming
tab = pfx + x + 'forw'
forw_uri = 'table:' + tab
forw_idx_uri = 'index:' + tab + ':inverse'
tab = pfx + x + 'back'
back_uri = 'table:' + tab
back_idx_uri = 'index:' + tab + ':inverse'
session.create(forw_uri, "columns=(k,v)," +
"key_format=i,value_format=" + self.formatcode)
session.create(forw_idx_uri, "columns=(v)")
session.create(back_uri, "columns=(k,v)," +
"key_format=" + self.formatcode + ",value_format=i")
session.create(back_idx_uri, "columns=(v)")
self.forw_uri = forw_uri
self.back_uri = back_uri
self.forw_idx_uri = forw_idx_uri
self.back_idx_uri = back_idx_uri
self.truncate()
def closeall(self):
if self.forw != None:
self.forw.close()
self.forw_idx.close()
self.back.close()
self.back_idx.close()
self.forw = None
self.forw_idx = None
self.back = None
self.back_idx = None
def truncate(self):
self.closeall()
self.session.truncate(self.forw_uri, None, None, None)
self.session.truncate(self.back_uri, None, None, None)
self.forw = self.session.open_cursor(self.forw_uri, None, None)
self.forw_idx = self.session.open_cursor(self.forw_idx_uri + "(k)",
None, None)
self.back = self.session.open_cursor(self.back_uri, None, None)
self.back_idx = self.session.open_cursor(self.back_idx_uri + "(k)",
None, None)
def check_range(self, low, high):
if low < self.validlow:
low = self.validlow
if high > self.validhigh:
high = self.validhigh
i = low
forw = self.forw
forw_idx = self.forw_idx
back = self.back
back_idx = self.back_idx
while i <= high:
forw[self.recno] = i
back[i] = self.recno
self.equals(forw[self.recno], i)
self.equals(forw_idx[i], self.recno)
self.equals(back[i], self.recno)
self.equals(back_idx[self.recno], i)
forw.reset()
forw_idx.reset()
back.reset()
back_idx.reset()
self.recno += 1
i += 1
# Test integer packing with various formats
class test_intpack(wttest.WiredTigerTestCase):
name = 'test_intpack'
# It's useful to test a larger range but avoid the CPU overhead normally
base_range = 66000 if wttest.islongtest() else 5000
# We have to be a bit verbose here with naming, scenario names are
# case insensitive and must be unique.
scenarios = make_scenarios([
('int8_t_b', dict(formatcode='b', low=-128, high=127, nbits=8)),
('uint8_t_B', dict(formatcode='B', low=0, high=255, nbits=8)),
('fix_len_8t', dict(formatcode='8t', low=0, high=255, nbits=8)),
('fix_len_5t', dict(formatcode='5t', low=0, high=31, nbits=5)),
('int16_t_h', dict(formatcode='h', low=-32768, high=32767, nbits=16)),
('uint16_t_H', dict(formatcode='H', low=0, high=65535, nbits=16)),
('int32_t_i', dict(formatcode='i', low=-2147483648, high=2147483647,
nbits=32)),
('uint32_t_I', dict(formatcode='I', low=0, high=4294967295, nbits=32)),
('int32_t_l', dict(formatcode='l', low=-2147483648, high=2147483647,
nbits=32)),
('uint32_t_L', dict(formatcode='L', low=0, high=4294967295, nbits=32)),
('int64_t_q', dict(formatcode='q', low=-9223372036854775808,
high=9223372036854775807, nbits=64)),
('uint64_t_Q', dict(formatcode='Q', low=0, high=18446744073709551615,
nbits=64)),
])
def test_packing(self):
pt = PackTester(self.formatcode, self.low, self.high, self.assertEquals)
self.assertEquals(2 ** self.nbits, self.high - self.low + 1)
pt.initialize(self.session)
pt.check_range(-self.base_range, self.base_range)
if self.nbits >= 32:
e32 = 2 ** 32
pt.check_range(e32 - 1000, e32 + 1000)
pt.check_range(-e32 - 1000, -e32 + 1000)
if self.nbits >= 64:
e64 = 2 ** 64
pt.check_range(e64 - 1000, e64 + 1000)
pt.check_range(-e64 - 1000, -e64 + 1000)
pt.truncate()
i = 8
while i < 1 << 60:
pt.check_range(-i - 1, -i + 1)
pt.check_range(i - 1, i + 1)
i <<= 1
if __name__ == '__main__':
wttest.run()
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