| // 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 <stdlib.h> |
| #include <stdio.h> |
| #include <iostream> |
| #include <limits.h> |
| #include "common/status.h" |
| #include "exec/read-write-util.h" |
| #include "util/hash-util.h" |
| #include "testutil/gtest-util.h" |
| |
| #include "common/names.h" |
| |
| namespace impala { |
| |
| void TestZInt(uint8_t* buf, int64_t buf_len, int32_t expected_val, |
| int expected_encoded_len) { |
| uint8_t* new_buf = buf; |
| ReadWriteUtil::ZIntResult r = ReadWriteUtil::ReadZInt(&new_buf, buf + buf_len); |
| EXPECT_TRUE(r.ok); |
| EXPECT_EQ(r.val, expected_val); |
| EXPECT_EQ(new_buf - buf, expected_encoded_len); |
| } |
| |
| void TestZInt(int32_t value) { |
| uint8_t buf[ReadWriteUtil::MAX_ZINT_LEN]; |
| int plen = ReadWriteUtil::PutZInt(value, static_cast<uint8_t*>(buf)); |
| EXPECT_TRUE(plen <= ReadWriteUtil::MAX_ZINT_LEN); |
| TestZInt(buf, sizeof(buf), value, plen); |
| } |
| |
| void TestZLong(uint8_t* buf, int64_t buf_len, int64_t expected_val, |
| int expected_encoded_len) { |
| uint8_t* new_buf = buf; |
| ReadWriteUtil::ZLongResult r = ReadWriteUtil::ReadZLong(&new_buf, buf + buf_len); |
| EXPECT_TRUE(r.ok); |
| EXPECT_EQ(r.val, expected_val); |
| EXPECT_EQ(new_buf - buf, expected_encoded_len); |
| } |
| |
| void TestZLong(int64_t value) { |
| uint8_t buf[ReadWriteUtil::MAX_ZLONG_LEN]; |
| int plen = ReadWriteUtil::PutZLong(value, static_cast<uint8_t*>(buf)); |
| EXPECT_TRUE(plen <= ReadWriteUtil::MAX_ZLONG_LEN); |
| TestZLong(buf, sizeof(buf), value, plen); |
| } |
| |
| // No expected value |
| void TestZInt(uint8_t* buf, int64_t buf_len, int expected_encoded_len) { |
| uint8_t* new_buf = buf; |
| ReadWriteUtil::ZIntResult r = ReadWriteUtil::ReadZInt(&new_buf, buf + buf_len); |
| EXPECT_TRUE(r.ok); |
| EXPECT_EQ(new_buf - buf, expected_encoded_len); |
| } |
| |
| void TestZLong(uint8_t* buf, int64_t buf_len, int expected_encoded_len) { |
| uint8_t* new_buf = buf; |
| ReadWriteUtil::ZLongResult r = ReadWriteUtil::ReadZLong(&new_buf, buf + buf_len); |
| EXPECT_TRUE(r.ok); |
| EXPECT_EQ(new_buf - buf, expected_encoded_len); |
| } |
| |
| // Test put and get of zigzag integers and longs. |
| TEST(ZigzagTest, Basic) { |
| // Test min/max of all sizes. |
| TestZInt(0); |
| TestZInt(INT_MAX); |
| TestZInt(INT_MIN); |
| TestZInt(SHRT_MIN); |
| TestZInt(SHRT_MAX); |
| TestZLong(0); |
| TestZLong(LONG_MAX); |
| TestZLong(LONG_MIN); |
| TestZLong(INT_MAX); |
| TestZLong(INT_MIN); |
| TestZLong(SHRT_MIN); |
| TestZLong(SHRT_MAX); |
| TestZLong(SCHAR_MIN); |
| TestZLong(SCHAR_MAX); |
| // Test somewhat random bit patterns. |
| int32_t value = 0xa2a2a2a2; |
| for (int i = 0; i < 1000; ++i) { |
| value = HashUtil::Hash(&value, sizeof (value), i); |
| TestZInt(value); |
| TestZLong(value); |
| TestZLong((static_cast<uint64_t>(value) << 32) | value); |
| } |
| } |
| |
| TEST(ZigzagTest, Errors) { |
| uint8_t buf[100]; |
| memset(buf, 0x80, sizeof(buf)); |
| |
| // Test 100-byte int |
| uint8_t* buf_ptr = static_cast<uint8_t*>(buf); |
| int64_t buf_len = sizeof(buf); |
| EXPECT_FALSE(ReadWriteUtil::ReadZLong(&buf_ptr, buf + buf_len).ok); |
| EXPECT_FALSE(ReadWriteUtil::ReadZInt(&buf_ptr, buf + buf_len).ok); |
| |
| // Test truncated int |
| buf_ptr = static_cast<uint8_t*>(buf); |
| buf_len = ReadWriteUtil::MAX_ZLONG_LEN - 1; |
| EXPECT_FALSE(ReadWriteUtil::ReadZLong(&buf_ptr, buf + buf_len).ok); |
| buf_len = ReadWriteUtil::MAX_ZINT_LEN - 1; |
| EXPECT_FALSE(ReadWriteUtil::ReadZInt(&buf_ptr, buf + buf_len).ok); |
| } |
| |
| // Test weird encodings and values that are arguably invalid but we still accept |
| TEST(ZigzagTest, Weird) { |
| uint8_t buf[100]; |
| |
| // Decodes to 0 but encoded in two bytes |
| buf[0] = 0x80; |
| buf[1] = 0x0; |
| TestZInt(buf, 2, 0, 2); |
| TestZLong(buf, 2, 0, 2); |
| TestZInt(buf, sizeof(buf), 0, 2); |
| TestZLong(buf, sizeof(buf), 0, 2); |
| |
| // Decodes to 1 but encoded in MAX_ZINT_LEN bytes |
| memset(buf, 0x80, ReadWriteUtil::MAX_ZINT_LEN); |
| buf[0] = 0x82; |
| buf[ReadWriteUtil::MAX_ZINT_LEN - 1] = 0x0; |
| TestZInt(buf, ReadWriteUtil::MAX_ZINT_LEN, 1, ReadWriteUtil::MAX_ZINT_LEN); |
| TestZLong(buf, ReadWriteUtil::MAX_ZINT_LEN, 1, ReadWriteUtil::MAX_ZINT_LEN); |
| TestZInt(buf, sizeof(buf), 1, ReadWriteUtil::MAX_ZINT_LEN); |
| TestZLong(buf, sizeof(buf), 1, ReadWriteUtil::MAX_ZINT_LEN); |
| |
| // Decodes to 1 but encoded in MAX_ZLONG_LEN bytes |
| memset(buf, 0x80, ReadWriteUtil::MAX_ZLONG_LEN); |
| buf[0] = 0x82; |
| buf[ReadWriteUtil::MAX_ZLONG_LEN - 1] = 0x0; |
| TestZLong(buf, ReadWriteUtil::MAX_ZLONG_LEN, 1, ReadWriteUtil::MAX_ZLONG_LEN); |
| TestZLong(buf, sizeof(buf), 1, ReadWriteUtil::MAX_ZLONG_LEN); |
| |
| // Overflows a long. Check that we don't crash and decode the correct number of bytes, |
| // but don't check for a particular value. |
| memset(buf, 0xff, ReadWriteUtil::MAX_ZLONG_LEN); |
| buf[ReadWriteUtil::MAX_ZLONG_LEN - 1] ^= 0x80; |
| TestZLong(buf, ReadWriteUtil::MAX_ZLONG_LEN, ReadWriteUtil::MAX_ZLONG_LEN); |
| |
| // Overflows an int. Check that we don't crash and decode the correct number of bytes, |
| // but don't check for a particular value. |
| memset(buf, 0xff, ReadWriteUtil::MAX_ZINT_LEN); |
| buf[ReadWriteUtil::MAX_ZINT_LEN - 1] ^= 0x80; |
| TestZInt(buf, ReadWriteUtil::MAX_ZINT_LEN, ReadWriteUtil::MAX_ZINT_LEN); |
| |
| } |
| } |
| |
| |