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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/util/compress.h>
#include <vespa/vespalib/util/exceptions.h>
using namespace vespalib;
using compress::Integer;
class CompressTest : public TestApp
{
private:
void verifyPositiveNumber(uint64_t n, const uint8_t * expected, size_t sz);
void verifyNumber(int64_t n, const uint8_t * expected, size_t sz);
void requireThatPositiveNumberCompressCorrectly();
void requireThatNumberCompressCorrectly();
public:
int Main() override;
};
void
CompressTest::verifyPositiveNumber(uint64_t n, const uint8_t * expected, size_t sz) {
uint8_t buf[8];
EXPECT_EQUAL(sz, Integer::compressPositive(n, buf));
EXPECT_EQUAL(sz, Integer::compressedPositiveLength(n));
for (size_t i(0); i < sz; i++) {
EXPECT_EQUAL(expected[i], buf[i]);
}
EXPECT_FALSE(Integer::check_decompress_positive_space(expected, 0u));
EXPECT_FALSE(Integer::check_decompress_positive_space(expected, sz - 1));
EXPECT_TRUE(Integer::check_decompress_positive_space(expected, sz));
uint64_t v(0);
EXPECT_EQUAL(sz, Integer::decompressPositive(v, expected));
EXPECT_EQUAL(n, v);
}
void
CompressTest::verifyNumber(int64_t n, const uint8_t * expected, size_t sz) {
uint8_t buf[8];
EXPECT_EQUAL(sz, Integer::compress(n, buf));
EXPECT_EQUAL(sz, Integer::compressedLength(n));
for (size_t i(0); i < sz; i++) {
EXPECT_EQUAL(expected[i], buf[i]);
}
EXPECT_FALSE(Integer::check_decompress_space(expected, 0u));
EXPECT_FALSE(Integer::check_decompress_space(expected, sz - 1));
EXPECT_TRUE(Integer::check_decompress_space(expected, sz));
int64_t v(0);
EXPECT_EQUAL(sz, Integer::decompress(v, expected));
EXPECT_EQUAL(n, v);
}
#define VERIFY_POSITIVE(n, p) verifyPositiveNumber(n, p, sizeof(p))
void
CompressTest::requireThatPositiveNumberCompressCorrectly()
{
const uint8_t zero[1] = {0};
VERIFY_POSITIVE(0, zero);
const uint8_t one[1] = {0x01};
VERIFY_POSITIVE(1, one);
const uint8_t x3f[1] = {0x3f};
VERIFY_POSITIVE(0x3f, x3f);
const uint8_t x40[2] = {0x80,0x40};
VERIFY_POSITIVE(0x40, x40);
const uint8_t x3fff[2] = {0xbf, 0xff};
VERIFY_POSITIVE(0x3fff, x3fff);
const uint8_t x4000[4] = {0xc0, 0x00, 0x40, 0x00};
VERIFY_POSITIVE(0x4000, x4000);
const uint8_t x3fffffff[4] = {0xff, 0xff, 0xff, 0xff};
VERIFY_POSITIVE(0x3fffffff, x3fffffff);
const uint8_t x40000000[4] = {0,0,0,0};
try {
VERIFY_POSITIVE(0x40000000, x40000000);
EXPECT_TRUE(false);
} catch (const IllegalArgumentException & e) {
EXPECT_EQUAL("Number '1073741824' too big, must extend encoding", e.getMessage());
}
try {
VERIFY_POSITIVE(-1, x40000000);
EXPECT_TRUE(false);
} catch (const IllegalArgumentException & e) {
EXPECT_EQUAL("Number '18446744073709551615' too big, must extend encoding", e.getMessage());
}
}
#define VERIFY_NUMBER(n, p) verifyNumber(n, p, sizeof(p))
void
CompressTest::requireThatNumberCompressCorrectly()
{
const uint8_t zero[1] = {0};
VERIFY_NUMBER(0, zero);
const uint8_t one[1] = {0x01};
VERIFY_NUMBER(1, one);
const uint8_t x1f[1] = {0x1f};
VERIFY_NUMBER(0x1f, x1f);
const uint8_t x20[2] = {0x40,0x20};
VERIFY_NUMBER(0x20, x20);
const uint8_t x1fff[2] = {0x5f, 0xff};
VERIFY_NUMBER(0x1fff, x1fff);
const uint8_t x2000[4] = {0x60, 0x00, 0x20, 0x00};
VERIFY_NUMBER(0x2000, x2000);
const uint8_t x1fffffff[4] = {0x7f, 0xff, 0xff, 0xff};
VERIFY_NUMBER(0x1fffffff, x1fffffff);
const uint8_t x20000000[4] = {0,0,0,0};
try {
VERIFY_NUMBER(0x20000000, x20000000);
EXPECT_TRUE(false);
} catch (const IllegalArgumentException & e) {
EXPECT_EQUAL("Number '536870912' too big, must extend encoding", e.getMessage());
}
const uint8_t mzero[1] = {0x81};
VERIFY_NUMBER(-1, mzero);
const uint8_t mone[1] = {0x82};
VERIFY_NUMBER(-2, mone);
const uint8_t mx1f[1] = {0x9f};
VERIFY_NUMBER(-0x1f, mx1f);
const uint8_t mx20[2] = {0xc0,0x20};
VERIFY_NUMBER(-0x20, mx20);
const uint8_t mx1fff[2] = {0xdf, 0xff};
VERIFY_NUMBER(-0x1fff, mx1fff);
const uint8_t mx2000[4] = {0xe0, 0x00, 0x20, 0x00};
VERIFY_NUMBER(-0x2000, mx2000);
const uint8_t mx1fffffff[4] = {0xff, 0xff, 0xff, 0xff};
VERIFY_NUMBER(-0x1fffffff, mx1fffffff);
const uint8_t mx20000000[4] = {0,0,0,0};
try {
VERIFY_NUMBER(-0x20000000, mx20000000);
EXPECT_TRUE(false);
} catch (const IllegalArgumentException & e) {
EXPECT_EQUAL("Number '-536870912' too big, must extend encoding", e.getMessage());
}
}
int
CompressTest::Main()
{
TEST_INIT("compress_test");
requireThatPositiveNumberCompressCorrectly();
requireThatNumberCompressCorrectly();
TEST_DONE();
}
TEST_APPHOOK(CompressTest)
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