libdatasketches_sys 0.1.3

Low-level bindings for Apache DataSketches C++ library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include "hll.hpp"
#include "CouponHashSet.hpp"
#include "HllUtil.hpp"

#include <catch2/catch.hpp>
#include <ostream>
#include <cmath>
#include <string>
#include <exception>
#include <stdexcept>

namespace datasketches {

TEST_CASE("coupon hash set: check corrupt bytearray", "[coupon_hash_set]") {
  uint8_t lgK = 8;
  hll_sketch sk1(lgK);
  for (int i = 0; i < 24; ++i) {
    sk1.update(i);
  }
  auto sketchBytes = sk1.serialize_updatable();
  uint8_t* bytes = sketchBytes.data();
  const size_t size = sketchBytes.size();

  bytes[hll_constants::PREAMBLE_INTS_BYTE] = 0;
  // fail in HllSketchImpl
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument);
  // fail in CouponHashSet
  REQUIRE_THROWS_AS(CouponHashSet<std::allocator<uint8_t>>::newSet(bytes, size, std::allocator<uint8_t>()), std::invalid_argument);
  bytes[hll_constants::PREAMBLE_INTS_BYTE] = hll_constants::HASH_SET_PREINTS;

  bytes[hll_constants::SER_VER_BYTE] = 0;
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument);
  bytes[hll_constants::SER_VER_BYTE] = hll_constants::SER_VER;

  bytes[hll_constants::FAMILY_BYTE] = 0;
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument);
  bytes[hll_constants::FAMILY_BYTE] = hll_constants::FAMILY_ID;

  bytes[hll_constants::LG_K_BYTE] = 6;
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument);
  bytes[hll_constants::LG_K_BYTE] = lgK;

  uint8_t tmp = bytes[hll_constants::MODE_BYTE];
  bytes[hll_constants::MODE_BYTE] = 0x10; // HLL_6, LIST
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument);
  bytes[hll_constants::MODE_BYTE] = tmp;

  tmp = bytes[hll_constants::LG_ARR_BYTE];
  bytes[hll_constants::LG_ARR_BYTE] = 0;
  hll_sketch::deserialize(bytes, size);
  // should work fine despite the corruption
  bytes[hll_constants::LG_ARR_BYTE] = tmp;

  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size - 1), std::out_of_range);
  REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, 3), std::out_of_range);
}

TEST_CASE("coupon hash set: check corrupt stream", "[coupon_hash_set]") {
  uint8_t lgK = 9;
  hll_sketch sk1(lgK);
  for (int i = 0; i < 24; ++i) {
    sk1.update(i);
  }
  std::stringstream ss;
  sk1.serialize_compact(ss);

  ss.seekp(hll_constants::PREAMBLE_INTS_BYTE);
  ss.put(0);
  ss.seekg(0);
  // fail in HllSketchImpl
  REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument);
  // fail in CouponHashSet
  REQUIRE_THROWS_AS(CouponHashSet<std::allocator<uint8_t>>::newSet(ss, std::allocator<uint8_t>()), std::invalid_argument);
  ss.seekp(hll_constants::PREAMBLE_INTS_BYTE);
  ss.put(hll_constants::HASH_SET_PREINTS);

  ss.seekp(hll_constants::SER_VER_BYTE);
  ss.put(0);
  ss.seekg(0);
  REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument);
  ss.seekp(hll_constants::SER_VER_BYTE);
  ss.put(hll_constants::SER_VER);

  ss.seekp(hll_constants::FAMILY_BYTE);
  ss.put(0);
  ss.seekg(0);
  REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument);
  ss.seekp(hll_constants::FAMILY_BYTE);
  ss.put(hll_constants::FAMILY_ID);

  ss.seekg(hll_constants::MODE_BYTE);
  auto tmp = ss.get();
  ss.seekp(hll_constants::MODE_BYTE);
  ss.put(0x22); // HLL_8, HLL
  ss.seekg(0);
  REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument);
  ss.seekp(hll_constants::MODE_BYTE);
  ss.put((char)tmp);

  ss.seekg(hll_constants::LG_ARR_BYTE);
  tmp = ss.get();
  ss.seekp(hll_constants::LG_ARR_BYTE);
  ss.put(0);
  ss.seekg(0);
  hll_sketch::deserialize(ss);
  // should work fine despite the corruption
  ss.seekp(hll_constants::LG_ARR_BYTE);
  ss.put((char)tmp);
}


} // namespace datasketches