diff options
Diffstat (limited to 'tensorflow/core/lib/strings/ordered_code_test.cc')
-rw-r--r-- | tensorflow/core/lib/strings/ordered_code_test.cc | 1183 |
1 files changed, 1183 insertions, 0 deletions
diff --git a/tensorflow/core/lib/strings/ordered_code_test.cc b/tensorflow/core/lib/strings/ordered_code_test.cc new file mode 100644 index 0000000000..d517d14f4a --- /dev/null +++ b/tensorflow/core/lib/strings/ordered_code_test.cc @@ -0,0 +1,1183 @@ +#include "tensorflow/core/lib/strings/ordered_code.h" + +#include <float.h> +#include <stddef.h> +#include <limits> +#include <vector> + +#include <gtest/gtest.h> +#include "tensorflow/core/lib/core/stringpiece.h" +#include "tensorflow/core/lib/random/simple_philox.h" +#include "tensorflow/core/platform/logging.h" +#include "tensorflow/core/platform/port.h" +#include "tensorflow/core/platform/test_benchmark.h" + +namespace tensorflow { +namespace strings { + +static string RandomString(random::SimplePhilox* rnd, int len) { + string x; + for (int i = 0; i < len; i++) { + x += rnd->Uniform(256); + } + return x; +} + +// --------------------------------------------------------------------- +// Utility template functions (they help templatize the tests below) + +// Read/WriteIncreasing are defined for string, uint64, int64 below. +template <typename T> +static void OCWriteIncreasing(string* dest, const T& val); +template <typename T> +static bool OCReadIncreasing(StringPiece* src, T* result); + +// Read/WriteIncreasing<string> +template <> +void OCWriteIncreasing<string>(string* dest, const string& val) { + OrderedCode::WriteString(dest, val); +} +template <> +bool OCReadIncreasing<string>(StringPiece* src, string* result) { + return OrderedCode::ReadString(src, result); +} + +// Read/WriteIncreasing<uint64> +template <> +void OCWriteIncreasing<uint64>(string* dest, const uint64& val) { + OrderedCode::WriteNumIncreasing(dest, val); +} +template <> +bool OCReadIncreasing<uint64>(StringPiece* src, uint64* result) { + return OrderedCode::ReadNumIncreasing(src, result); +} + +// Read/WriteIncreasing<int64> +template <> +void OCWriteIncreasing<int64>(string* dest, const int64& val) { + OrderedCode::WriteSignedNumIncreasing(dest, val); +} +template <> +bool OCReadIncreasing<int64>(StringPiece* src, int64* result) { + return OrderedCode::ReadSignedNumIncreasing(src, result); +} + +template <typename T> +string OCWrite(T val) { + string result; + OCWriteIncreasing<T>(&result, val); + return result; +} + +template <typename T> +void OCWriteToString(string* result, T val) { + OCWriteIncreasing<T>(result, val); +} + +template <typename T> +bool OCRead(StringPiece* s, T* val) { + return OCReadIncreasing<T>(s, val); +} + +// --------------------------------------------------------------------- +// Numbers + +template <typename T> +static T TestRead(const string& a) { + // gracefully reject any proper prefix of an encoding + for (int i = 0; i < a.size() - 1; ++i) { + StringPiece s(a.data(), i); + CHECK(!OCRead<T>(&s, NULL)); + CHECK_EQ(s, a.substr(0, i)); + } + + StringPiece s(a); + T v; + CHECK(OCRead<T>(&s, &v)); + CHECK(s.empty()); + return v; +} + +template <typename T> +static void TestWriteRead(T expected) { + EXPECT_EQ(expected, TestRead<T>(OCWrite<T>(expected))); +} + +// Verifies that the second Write* call appends a non-empty string to its +// output. +template <typename T, typename U> +static void TestWriteAppends(T first, U second) { + string encoded; + OCWriteToString<T>(&encoded, first); + string encoded_first_only = encoded; + OCWriteToString<U>(&encoded, second); + EXPECT_NE(encoded, encoded_first_only); + EXPECT_TRUE(StringPiece(encoded).starts_with(encoded_first_only)); +} + +template <typename T> +static void TestNumbers(T multiplier) { + // first test powers of 2 (and nearby numbers) + for (T x = std::numeric_limits<T>().max(); x != 0; x /= 2) { + TestWriteRead(multiplier * (x - 1)); + TestWriteRead(multiplier * x); + if (x != std::numeric_limits<T>::max()) { + TestWriteRead(multiplier * (x + 1)); + } else if (multiplier < 0 && multiplier == -1) { + TestWriteRead(-x - 1); + } + } + + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + for (int bits = 1; bits <= std::numeric_limits<T>().digits; ++bits) { + // test random non-negative numbers with given number of significant bits + const uint64 mask = (~0ULL) >> (64 - bits); + for (int i = 0; i < 1000; i++) { + T x = rnd.Rand64() & mask; + TestWriteRead(multiplier * x); + T y = rnd.Rand64() & mask; + TestWriteAppends(multiplier * x, multiplier * y); + } + } +} + +// Return true iff 'a' is "before" 'b' +static bool CompareStrings(const string& a, const string& b) { return (a < b); } + +template <typename T> +static void TestNumberOrdering() { + // first the negative numbers (if T is signed, otherwise no-op) + string laststr = OCWrite<T>(std::numeric_limits<T>().min()); + for (T num = std::numeric_limits<T>().min() / 2; num != 0; num /= 2) { + string strminus1 = OCWrite<T>(num - 1); + string str = OCWrite<T>(num); + string strplus1 = OCWrite<T>(num + 1); + + CHECK(CompareStrings(strminus1, str)); + CHECK(CompareStrings(str, strplus1)); + + // Compare 'str' with 'laststr'. When we approach 0, 'laststr' is + // not necessarily before 'strminus1'. + CHECK(CompareStrings(laststr, str)); + laststr = str; + } + + // then the positive numbers + laststr = OCWrite<T>(0); + T num = 1; + while (num < std::numeric_limits<T>().max() / 2) { + num *= 2; + string strminus1 = OCWrite<T>(num - 1); + string str = OCWrite<T>(num); + string strplus1 = OCWrite<T>(num + 1); + + CHECK(CompareStrings(strminus1, str)); + CHECK(CompareStrings(str, strplus1)); + + // Compare 'str' with 'laststr'. + CHECK(CompareStrings(laststr, str)); + laststr = str; + } +} + +// Helper routine for testing TEST_SkipToNextSpecialByte +static int FindSpecial(const string& x) { + const char* p = x.data(); + const char* limit = p + x.size(); + const char* result = OrderedCode::TEST_SkipToNextSpecialByte(p, limit); + return result - p; +} + +TEST(OrderedCode, SkipToNextSpecialByte) { + for (size_t len = 0; len < 256; len++) { + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + string x; + while (x.size() < len) { + char c = 1 + rnd.Uniform(254); + ASSERT_NE(c, 0); + ASSERT_NE(c, 255); + x += c; // No 0 bytes, no 255 bytes + } + EXPECT_EQ(FindSpecial(x), x.size()); + for (size_t special_pos = 0; special_pos < len; special_pos++) { + for (size_t special_test = 0; special_test < 2; special_test++) { + const char special_byte = (special_test == 0) ? 0 : 255; + string y = x; + y[special_pos] = special_byte; + EXPECT_EQ(FindSpecial(y), special_pos); + if (special_pos < 16) { + // Add some special bytes after the one at special_pos to make sure + // we still return the earliest special byte in the string + for (size_t rest = special_pos + 1; rest < len; rest++) { + if (rnd.OneIn(3)) { + y[rest] = rnd.OneIn(2) ? 0 : 255; + EXPECT_EQ(FindSpecial(y), special_pos); + } + } + } + } + } + } +} + +TEST(OrderedCode, ExhaustiveFindSpecial) { + char buf[16]; + char* limit = buf + sizeof(buf); + int count = 0; + for (int start_offset = 0; start_offset <= 5; start_offset += 5) { + // We test exhaustively with all combinations of 3 bytes starting + // at offset 0 and offset 5 (so as to test with the bytes at both + // ends of a 64-bit word). + for (size_t i = 0; i < sizeof(buf); i++) { + buf[i] = 'a'; // Not a special byte + } + for (int b0 = 0; b0 < 256; b0++) { + for (int b1 = 0; b1 < 256; b1++) { + for (int b2 = 0; b2 < 256; b2++) { + buf[start_offset + 0] = b0; + buf[start_offset + 1] = b1; + buf[start_offset + 2] = b2; + char* expected; + if (b0 == 0 || b0 == 255) { + expected = &buf[start_offset]; + } else if (b1 == 0 || b1 == 255) { + expected = &buf[start_offset + 1]; + } else if (b2 == 0 || b2 == 255) { + expected = &buf[start_offset + 2]; + } else { + expected = limit; + } + count++; + EXPECT_EQ(expected, + OrderedCode::TEST_SkipToNextSpecialByte(buf, limit)); + } + } + } + } + EXPECT_EQ(count, 256 * 256 * 256 * 2); +} + +TEST(Uint64, EncodeDecode) { TestNumbers<uint64>(1); } + +TEST(Uint64, Ordering) { TestNumberOrdering<uint64>(); } + +TEST(Int64, EncodeDecode) { + TestNumbers<int64>(1); + TestNumbers<int64>(-1); +} + +TEST(Int64, Ordering) { TestNumberOrdering<int64>(); } + +// Returns the bitwise complement of s. +static inline string StrNot(const string& s) { + string result; + for (string::const_iterator it = s.begin(); it != s.end(); ++it) + result.push_back(~*it); + return result; +} + +template <typename T> +static void TestInvalidEncoding(const string& s) { + StringPiece p(s); + EXPECT_FALSE(OCRead<T>(&p, static_cast<T*>(NULL))); + EXPECT_EQ(s, p); +} + +TEST(OrderedCodeInvalidEncodingsTest, Overflow) { + // 1U << 64, increasing and decreasing + const string k2xx64U = "\x09\x01" + string(8, 0); + TestInvalidEncoding<uint64>(k2xx64U); + + // 1 << 63 and ~(1 << 63), increasing and decreasing + const string k2xx63 = "\xff\xc0\x80" + string(7, 0); + TestInvalidEncoding<int64>(k2xx63); + TestInvalidEncoding<int64>(StrNot(k2xx63)); +} + +TEST(OrderedCodeInvalidEncodingsDeathTest, NonCanonical) { + // Test "ambiguous"/"non-canonical" encodings. + // These are non-minimal (but otherwise "valid") encodings that + // differ from the minimal encoding chosen by OrderedCode::WriteXXX + // and thus should be avoided to not mess up the string ordering of + // encodings. + + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + + for (int n = 2; n <= 9; ++n) { + // The zero in non_minimal[1] is "redundant". + string non_minimal = + string(1, n - 1) + string(1, 0) + RandomString(&rnd, n - 2); + EXPECT_EQ(n, non_minimal.length()); + + EXPECT_NE(OCWrite<uint64>(0), non_minimal); +#ifndef NDEBUG + StringPiece s(non_minimal); + EXPECT_DEATH(OrderedCode::ReadNumIncreasing(&s, NULL), "invalid encoding"); +#else + TestRead<uint64>(non_minimal); +#endif + } + + for (int n = 2; n <= 10; ++n) { + // Header with 1 sign bit and n-1 size bits. + string header = string(n / 8, 0xff) + string(1, 0xff << (8 - (n % 8))); + // There are more than 7 zero bits between header bits and "payload". + string non_minimal = header + + string(1, rnd.Uniform(256) & ~*header.rbegin()) + + RandomString(&rnd, n - header.length() - 1); + EXPECT_EQ(n, non_minimal.length()); + + EXPECT_NE(OCWrite<int64>(0), non_minimal); +#ifndef NDEBUG + StringPiece s(non_minimal); + EXPECT_DEATH(OrderedCode::ReadSignedNumIncreasing(&s, NULL), + "invalid encoding") + << n; +#else + TestRead<int64>(non_minimal); +#endif + } +} + +// Returns random number with specified number of bits, +// i.e., in the range [2^(bits-1),2^bits). +static uint64 NextBits(random::SimplePhilox* rnd, int bits) { + return (bits != 0) + ? (rnd->Rand64() % (1LL << (bits - 1))) + (1LL << (bits - 1)) + : 0; +} + +template <typename T> +static void BM_WriteNum(int n, T multiplier) { + static const int kValues = 64; + T values[kValues]; + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + // Use enough distinct values to confuse the branch predictor + for (int i = 0; i < kValues; i++) { + values[i] = NextBits(&rnd, n % 64) * multiplier; + } + string result; + int index = 0; + while (n-- > 0) { + result.clear(); + OCWriteToString<T>(&result, values[index % kValues]); + index++; + } +} + +template <typename T> +static void BM_ReadNum(int n, T multiplier) { + string x; + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + // Use enough distinct values to confuse the branch predictor + static const int kValues = 64; + string values[kValues]; + for (int i = 0; i < kValues; i++) { + T val = NextBits(&rnd, i % 64) * multiplier; + values[i] = OCWrite<T>(val); + } + uint32 index = 0; + while (n-- > 0) { + T val; + StringPiece s = values[index++ % kValues]; + OCRead<T>(&s, &val); + } +} + +#define BENCHMARK_NUM(name, T, multiplier) \ + static void BM_Write##name(int n) { BM_WriteNum<T>(n, multiplier); } \ + BENCHMARK(BM_Write##name); \ + static void BM_Read##name(int n) { BM_ReadNum<T>(n, multiplier); } \ + BENCHMARK(BM_Read##name) + +BENCHMARK_NUM(NumIncreasing, uint64, 1); +BENCHMARK_NUM(SignedNum, int64, 1); +BENCHMARK_NUM(SignedNumNegative, int64, -1); + +#undef BENCHMARK_NUM + +// --------------------------------------------------------------------- +// Strings + +TEST(String, EncodeDecode) { + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + + for (int len = 0; len < 256; len++) { + const string a = RandomString(&rnd, len); + TestWriteRead(a); + for (int len2 = 0; len2 < 64; len2++) { + const string b = RandomString(&rnd, len2); + + TestWriteAppends(a, b); + + string out; + OCWriteToString<string>(&out, a); + OCWriteToString<string>(&out, b); + + string a2, b2, dummy; + StringPiece s = out; + StringPiece s2 = out; + CHECK(OCRead<string>(&s, &a2)); + CHECK(OCRead<string>(&s2, NULL)); + CHECK_EQ(s, s2); + + CHECK(OCRead<string>(&s, &b2)); + CHECK(OCRead<string>(&s2, NULL)); + CHECK_EQ(s, s2); + + CHECK(!OCRead<string>(&s, &dummy)); + CHECK(!OCRead<string>(&s2, NULL)); + CHECK_EQ(a, a2); + CHECK_EQ(b, b2); + CHECK(s.empty()); + CHECK(s2.empty()); + } + } +} + +// 'str' is a static C-style string that may contain '\0' +#define STATIC_STR(str) StringPiece((str), sizeof(str) - 1) + +static string EncodeStringIncreasing(StringPiece value) { + string encoded; + OrderedCode::WriteString(&encoded, value); + return encoded; +} + +TEST(String, Increasing) { + // Here are a series of strings in non-decreasing order, including + // consecutive strings such that the second one is equal to, a proper + // prefix of, or has the same length as the first one. Most also contain + // the special escaping characters '\x00' and '\xff'. + ASSERT_EQ(EncodeStringIncreasing(STATIC_STR("")), + EncodeStringIncreasing(STATIC_STR(""))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("")), + EncodeStringIncreasing(STATIC_STR("\x00"))); + + ASSERT_EQ(EncodeStringIncreasing(STATIC_STR("\x00")), + EncodeStringIncreasing(STATIC_STR("\x00"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("\x00")), + EncodeStringIncreasing(STATIC_STR("\x01"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("\x01")), + EncodeStringIncreasing(STATIC_STR("a"))); + + ASSERT_EQ(EncodeStringIncreasing(STATIC_STR("a")), + EncodeStringIncreasing(STATIC_STR("a"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("a")), + EncodeStringIncreasing(STATIC_STR("aa"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("aa")), + EncodeStringIncreasing(STATIC_STR("\xff"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("\xff")), + EncodeStringIncreasing(STATIC_STR("\xff\x00"))); + + ASSERT_LT(EncodeStringIncreasing(STATIC_STR("\xff\x00")), + EncodeStringIncreasing(STATIC_STR("\xff\x01"))); +} + +TEST(EncodingIsExpected, String) { + std::vector<std::pair<string, string>> data = { + {"", string("\x00\x01", 2)}, + {"foo", string("foo\x00\x01", 5)}, + {"hello", string("hello\x00\x01", 7)}, + {string("\x00\x01\xff", 3), string("\x00\xff\x01\xff\x00\x00\x01", 7)}, + }; + for (const auto& t : data) { + string result; + OrderedCode::WriteString(&result, t.first); + EXPECT_EQ(t.second, result); + + StringPiece in = result; + string decoded; + EXPECT_TRUE(OrderedCode::ReadString(&in, &decoded)); + EXPECT_EQ(t.first, decoded); + EXPECT_EQ("", in); + } +} + +TEST(EncodingIsExpected, Unsigned) { + std::vector<std::pair<uint64, string>> data = { + {0x0ull, string("\000", 1)}, + {0x1ull, string("\001\001", 2)}, + {0x2ull, string("\001\002", 2)}, + {0x1ull, string("\001\001", 2)}, + {0x2ull, string("\001\002", 2)}, + {0x3ull, string("\001\003", 2)}, + {0x3ull, string("\001\003", 2)}, + {0x4ull, string("\001\004", 2)}, + {0x5ull, string("\001\005", 2)}, + {0x7ull, string("\001\007", 2)}, + {0x8ull, string("\001\010", 2)}, + {0x9ull, string("\001\t", 2)}, + {0xfull, string("\001\017", 2)}, + {0x10ull, string("\001\020", 2)}, + {0x11ull, string("\001\021", 2)}, + {0x1full, string("\001\037", 2)}, + {0x20ull, string("\001 ", 2)}, + {0x21ull, string("\001!", 2)}, + {0x3full, string("\001?", 2)}, + {0x40ull, string("\001@", 2)}, + {0x41ull, string("\001A", 2)}, + {0x7full, string("\001\177", 2)}, + {0x80ull, string("\001\200", 2)}, + {0x81ull, string("\001\201", 2)}, + {0xffull, string("\001\377", 2)}, + {0x100ull, string("\002\001\000", 3)}, + {0x101ull, string("\002\001\001", 3)}, + {0x1ffull, string("\002\001\377", 3)}, + {0x200ull, string("\002\002\000", 3)}, + {0x201ull, string("\002\002\001", 3)}, + {0x3ffull, string("\002\003\377", 3)}, + {0x400ull, string("\002\004\000", 3)}, + {0x401ull, string("\002\004\001", 3)}, + {0x7ffull, string("\002\007\377", 3)}, + {0x800ull, string("\002\010\000", 3)}, + {0x801ull, string("\002\010\001", 3)}, + {0xfffull, string("\002\017\377", 3)}, + {0x1000ull, string("\002\020\000", 3)}, + {0x1001ull, string("\002\020\001", 3)}, + {0x1fffull, string("\002\037\377", 3)}, + {0x2000ull, string("\002 \000", 3)}, + {0x2001ull, string("\002 \001", 3)}, + {0x3fffull, string("\002?\377", 3)}, + {0x4000ull, string("\002@\000", 3)}, + {0x4001ull, string("\002@\001", 3)}, + {0x7fffull, string("\002\177\377", 3)}, + {0x8000ull, string("\002\200\000", 3)}, + {0x8001ull, string("\002\200\001", 3)}, + {0xffffull, string("\002\377\377", 3)}, + {0x10000ull, string("\003\001\000\000", 4)}, + {0x10001ull, string("\003\001\000\001", 4)}, + {0x1ffffull, string("\003\001\377\377", 4)}, + {0x20000ull, string("\003\002\000\000", 4)}, + {0x20001ull, string("\003\002\000\001", 4)}, + {0x3ffffull, string("\003\003\377\377", 4)}, + {0x40000ull, string("\003\004\000\000", 4)}, + {0x40001ull, string("\003\004\000\001", 4)}, + {0x7ffffull, string("\003\007\377\377", 4)}, + {0x80000ull, string("\003\010\000\000", 4)}, + {0x80001ull, string("\003\010\000\001", 4)}, + {0xfffffull, string("\003\017\377\377", 4)}, + {0x100000ull, string("\003\020\000\000", 4)}, + {0x100001ull, string("\003\020\000\001", 4)}, + {0x1fffffull, string("\003\037\377\377", 4)}, + {0x200000ull, string("\003 \000\000", 4)}, + {0x200001ull, string("\003 \000\001", 4)}, + {0x3fffffull, string("\003?\377\377", 4)}, + {0x400000ull, string("\003@\000\000", 4)}, + {0x400001ull, string("\003@\000\001", 4)}, + {0x7fffffull, string("\003\177\377\377", 4)}, + {0x800000ull, string("\003\200\000\000", 4)}, + {0x800001ull, string("\003\200\000\001", 4)}, + {0xffffffull, string("\003\377\377\377", 4)}, + {0x1000000ull, string("\004\001\000\000\000", 5)}, + {0x1000001ull, string("\004\001\000\000\001", 5)}, + {0x1ffffffull, string("\004\001\377\377\377", 5)}, + {0x2000000ull, string("\004\002\000\000\000", 5)}, + {0x2000001ull, string("\004\002\000\000\001", 5)}, + {0x3ffffffull, string("\004\003\377\377\377", 5)}, + {0x4000000ull, string("\004\004\000\000\000", 5)}, + {0x4000001ull, string("\004\004\000\000\001", 5)}, + {0x7ffffffull, string("\004\007\377\377\377", 5)}, + {0x8000000ull, string("\004\010\000\000\000", 5)}, + {0x8000001ull, string("\004\010\000\000\001", 5)}, + {0xfffffffull, string("\004\017\377\377\377", 5)}, + {0x10000000ull, string("\004\020\000\000\000", 5)}, + {0x10000001ull, string("\004\020\000\000\001", 5)}, + {0x1fffffffull, string("\004\037\377\377\377", 5)}, + {0x20000000ull, string("\004 \000\000\000", 5)}, + {0x20000001ull, string("\004 \000\000\001", 5)}, + {0x3fffffffull, string("\004?\377\377\377", 5)}, + {0x40000000ull, string("\004@\000\000\000", 5)}, + {0x40000001ull, string("\004@\000\000\001", 5)}, + {0x7fffffffull, string("\004\177\377\377\377", 5)}, + {0x80000000ull, string("\004\200\000\000\000", 5)}, + {0x80000001ull, string("\004\200\000\000\001", 5)}, + {0xffffffffull, string("\004\377\377\377\377", 5)}, + {0x100000000ull, string("\005\001\000\000\000\000", 6)}, + {0x100000001ull, string("\005\001\000\000\000\001", 6)}, + {0x1ffffffffull, string("\005\001\377\377\377\377", 6)}, + {0x200000000ull, string("\005\002\000\000\000\000", 6)}, + {0x200000001ull, string("\005\002\000\000\000\001", 6)}, + {0x3ffffffffull, string("\005\003\377\377\377\377", 6)}, + {0x400000000ull, string("\005\004\000\000\000\000", 6)}, + {0x400000001ull, string("\005\004\000\000\000\001", 6)}, + {0x7ffffffffull, string("\005\007\377\377\377\377", 6)}, + {0x800000000ull, string("\005\010\000\000\000\000", 6)}, + {0x800000001ull, string("\005\010\000\000\000\001", 6)}, + {0xfffffffffull, string("\005\017\377\377\377\377", 6)}, + {0x1000000000ull, string("\005\020\000\000\000\000", 6)}, + {0x1000000001ull, string("\005\020\000\000\000\001", 6)}, + {0x1fffffffffull, string("\005\037\377\377\377\377", 6)}, + {0x2000000000ull, string("\005 \000\000\000\000", 6)}, + {0x2000000001ull, string("\005 \000\000\000\001", 6)}, + {0x3fffffffffull, string("\005?\377\377\377\377", 6)}, + {0x4000000000ull, string("\005@\000\000\000\000", 6)}, + {0x4000000001ull, string("\005@\000\000\000\001", 6)}, + {0x7fffffffffull, string("\005\177\377\377\377\377", 6)}, + {0x8000000000ull, string("\005\200\000\000\000\000", 6)}, + {0x8000000001ull, string("\005\200\000\000\000\001", 6)}, + {0xffffffffffull, string("\005\377\377\377\377\377", 6)}, + {0x10000000000ull, string("\006\001\000\000\000\000\000", 7)}, + {0x10000000001ull, string("\006\001\000\000\000\000\001", 7)}, + {0x1ffffffffffull, string("\006\001\377\377\377\377\377", 7)}, + {0x20000000000ull, string("\006\002\000\000\000\000\000", 7)}, + {0x20000000001ull, string("\006\002\000\000\000\000\001", 7)}, + {0x3ffffffffffull, string("\006\003\377\377\377\377\377", 7)}, + {0x40000000000ull, string("\006\004\000\000\000\000\000", 7)}, + {0x40000000001ull, string("\006\004\000\000\000\000\001", 7)}, + {0x7ffffffffffull, string("\006\007\377\377\377\377\377", 7)}, + {0x80000000000ull, string("\006\010\000\000\000\000\000", 7)}, + {0x80000000001ull, string("\006\010\000\000\000\000\001", 7)}, + {0xfffffffffffull, string("\006\017\377\377\377\377\377", 7)}, + {0x100000000000ull, string("\006\020\000\000\000\000\000", 7)}, + {0x100000000001ull, string("\006\020\000\000\000\000\001", 7)}, + {0x1fffffffffffull, string("\006\037\377\377\377\377\377", 7)}, + {0x200000000000ull, string("\006 \000\000\000\000\000", 7)}, + {0x200000000001ull, string("\006 \000\000\000\000\001", 7)}, + {0x3fffffffffffull, string("\006?\377\377\377\377\377", 7)}, + {0x400000000000ull, string("\006@\000\000\000\000\000", 7)}, + {0x400000000001ull, string("\006@\000\000\000\000\001", 7)}, + {0x7fffffffffffull, string("\006\177\377\377\377\377\377", 7)}, + {0x800000000000ull, string("\006\200\000\000\000\000\000", 7)}, + {0x800000000001ull, string("\006\200\000\000\000\000\001", 7)}, + {0xffffffffffffull, string("\006\377\377\377\377\377\377", 7)}, + {0x1000000000000ull, string("\007\001\000\000\000\000\000\000", 8)}, + {0x1000000000001ull, string("\007\001\000\000\000\000\000\001", 8)}, + {0x1ffffffffffffull, string("\007\001\377\377\377\377\377\377", 8)}, + {0x2000000000000ull, string("\007\002\000\000\000\000\000\000", 8)}, + {0x2000000000001ull, string("\007\002\000\000\000\000\000\001", 8)}, + {0x3ffffffffffffull, string("\007\003\377\377\377\377\377\377", 8)}, + {0x4000000000000ull, string("\007\004\000\000\000\000\000\000", 8)}, + {0x4000000000001ull, string("\007\004\000\000\000\000\000\001", 8)}, + {0x7ffffffffffffull, string("\007\007\377\377\377\377\377\377", 8)}, + {0x8000000000000ull, string("\007\010\000\000\000\000\000\000", 8)}, + {0x8000000000001ull, string("\007\010\000\000\000\000\000\001", 8)}, + {0xfffffffffffffull, string("\007\017\377\377\377\377\377\377", 8)}, + {0x10000000000000ull, string("\007\020\000\000\000\000\000\000", 8)}, + {0x10000000000001ull, string("\007\020\000\000\000\000\000\001", 8)}, + {0x1fffffffffffffull, string("\007\037\377\377\377\377\377\377", 8)}, + {0x20000000000000ull, string("\007 \000\000\000\000\000\000", 8)}, + {0x20000000000001ull, string("\007 \000\000\000\000\000\001", 8)}, + {0x3fffffffffffffull, string("\007?\377\377\377\377\377\377", 8)}, + {0x40000000000000ull, string("\007@\000\000\000\000\000\000", 8)}, + {0x40000000000001ull, string("\007@\000\000\000\000\000\001", 8)}, + {0x7fffffffffffffull, string("\007\177\377\377\377\377\377\377", 8)}, + {0x80000000000000ull, string("\007\200\000\000\000\000\000\000", 8)}, + {0x80000000000001ull, string("\007\200\000\000\000\000\000\001", 8)}, + {0xffffffffffffffull, string("\007\377\377\377\377\377\377\377", 8)}, + {0x100000000000000ull, string("\010\001\000\000\000\000\000\000\000", 9)}, + {0x100000000000001ull, string("\010\001\000\000\000\000\000\000\001", 9)}, + {0x1ffffffffffffffull, string("\010\001\377\377\377\377\377\377\377", 9)}, + {0x200000000000000ull, string("\010\002\000\000\000\000\000\000\000", 9)}, + {0x200000000000001ull, string("\010\002\000\000\000\000\000\000\001", 9)}, + {0x3ffffffffffffffull, string("\010\003\377\377\377\377\377\377\377", 9)}, + {0x400000000000000ull, string("\010\004\000\000\000\000\000\000\000", 9)}, + {0x400000000000001ull, string("\010\004\000\000\000\000\000\000\001", 9)}, + {0x7ffffffffffffffull, string("\010\007\377\377\377\377\377\377\377", 9)}, + {0x800000000000000ull, string("\010\010\000\000\000\000\000\000\000", 9)}, + {0x800000000000001ull, string("\010\010\000\000\000\000\000\000\001", 9)}, + {0xfffffffffffffffull, string("\010\017\377\377\377\377\377\377\377", 9)}, + {0x1000000000000000ull, + string("\010\020\000\000\000\000\000\000\000", 9)}, + {0x1000000000000001ull, + string("\010\020\000\000\000\000\000\000\001", 9)}, + {0x1fffffffffffffffull, + string("\010\037\377\377\377\377\377\377\377", 9)}, + {0x2000000000000000ull, string("\010 \000\000\000\000\000\000\000", 9)}, + {0x2000000000000001ull, string("\010 \000\000\000\000\000\000\001", 9)}, + {0x3fffffffffffffffull, string("\010?\377\377\377\377\377\377\377", 9)}, + {0x4000000000000000ull, string("\010@\000\000\000\000\000\000\000", 9)}, + {0x4000000000000001ull, string("\010@\000\000\000\000\000\000\001", 9)}, + {0x7fffffffffffffffull, + string("\010\177\377\377\377\377\377\377\377", 9)}, + {0x8000000000000000ull, + string("\010\200\000\000\000\000\000\000\000", 9)}, + {0x8000000000000001ull, + string("\010\200\000\000\000\000\000\000\001", 9)}, + }; + for (const auto& t : data) { + uint64 num = t.first; + string result; + OrderedCode::WriteNumIncreasing(&result, num); + EXPECT_EQ(t.second, result) << std::hex << num; + + StringPiece in = result; + uint64 decoded; + EXPECT_TRUE(OrderedCode::ReadNumIncreasing(&in, &decoded)); + EXPECT_EQ(num, decoded); + EXPECT_EQ("", in); + } +} + +TEST(EncodingIsExpected, Signed) { + std::vector<std::pair<int64, string>> data = { + {0ll, string("\200", 1)}, + {1ll, string("\201", 1)}, + {2ll, string("\202", 1)}, + {1ll, string("\201", 1)}, + {2ll, string("\202", 1)}, + {3ll, string("\203", 1)}, + {3ll, string("\203", 1)}, + {4ll, string("\204", 1)}, + {5ll, string("\205", 1)}, + {7ll, string("\207", 1)}, + {8ll, string("\210", 1)}, + {9ll, string("\211", 1)}, + {15ll, string("\217", 1)}, + {16ll, string("\220", 1)}, + {17ll, string("\221", 1)}, + {31ll, string("\237", 1)}, + {32ll, string("\240", 1)}, + {33ll, string("\241", 1)}, + {63ll, string("\277", 1)}, + {64ll, string("\300@", 2)}, + {65ll, string("\300A", 2)}, + {127ll, string("\300\177", 2)}, + {128ll, string("\300\200", 2)}, + {129ll, string("\300\201", 2)}, + {255ll, string("\300\377", 2)}, + {256ll, string("\301\000", 2)}, + {257ll, string("\301\001", 2)}, + {511ll, string("\301\377", 2)}, + {512ll, string("\302\000", 2)}, + {513ll, string("\302\001", 2)}, + {1023ll, string("\303\377", 2)}, + {1024ll, string("\304\000", 2)}, + {1025ll, string("\304\001", 2)}, + {2047ll, string("\307\377", 2)}, + {2048ll, string("\310\000", 2)}, + {2049ll, string("\310\001", 2)}, + {4095ll, string("\317\377", 2)}, + {4096ll, string("\320\000", 2)}, + {4097ll, string("\320\001", 2)}, + {8191ll, string("\337\377", 2)}, + {8192ll, string("\340 \000", 3)}, + {8193ll, string("\340 \001", 3)}, + {16383ll, string("\340?\377", 3)}, + {16384ll, string("\340@\000", 3)}, + {16385ll, string("\340@\001", 3)}, + {32767ll, string("\340\177\377", 3)}, + {32768ll, string("\340\200\000", 3)}, + {32769ll, string("\340\200\001", 3)}, + {65535ll, string("\340\377\377", 3)}, + {65536ll, string("\341\000\000", 3)}, + {65537ll, string("\341\000\001", 3)}, + {131071ll, string("\341\377\377", 3)}, + {131072ll, string("\342\000\000", 3)}, + {131073ll, string("\342\000\001", 3)}, + {262143ll, string("\343\377\377", 3)}, + {262144ll, string("\344\000\000", 3)}, + {262145ll, string("\344\000\001", 3)}, + {524287ll, string("\347\377\377", 3)}, + {524288ll, string("\350\000\000", 3)}, + {524289ll, string("\350\000\001", 3)}, + {1048575ll, string("\357\377\377", 3)}, + {1048576ll, string("\360\020\000\000", 4)}, + {1048577ll, string("\360\020\000\001", 4)}, + {2097151ll, string("\360\037\377\377", 4)}, + {2097152ll, string("\360 \000\000", 4)}, + {2097153ll, string("\360 \000\001", 4)}, + {4194303ll, string("\360?\377\377", 4)}, + {4194304ll, string("\360@\000\000", 4)}, + {4194305ll, string("\360@\000\001", 4)}, + {8388607ll, string("\360\177\377\377", 4)}, + {8388608ll, string("\360\200\000\000", 4)}, + {8388609ll, string("\360\200\000\001", 4)}, + {16777215ll, string("\360\377\377\377", 4)}, + {16777216ll, string("\361\000\000\000", 4)}, + {16777217ll, string("\361\000\000\001", 4)}, + {33554431ll, string("\361\377\377\377", 4)}, + {33554432ll, string("\362\000\000\000", 4)}, + {33554433ll, string("\362\000\000\001", 4)}, + {67108863ll, string("\363\377\377\377", 4)}, + {67108864ll, string("\364\000\000\000", 4)}, + {67108865ll, string("\364\000\000\001", 4)}, + {134217727ll, string("\367\377\377\377", 4)}, + {134217728ll, string("\370\010\000\000\000", 5)}, + {134217729ll, string("\370\010\000\000\001", 5)}, + {268435455ll, string("\370\017\377\377\377", 5)}, + {268435456ll, string("\370\020\000\000\000", 5)}, + {268435457ll, string("\370\020\000\000\001", 5)}, + {536870911ll, string("\370\037\377\377\377", 5)}, + {536870912ll, string("\370 \000\000\000", 5)}, + {536870913ll, string("\370 \000\000\001", 5)}, + {1073741823ll, string("\370?\377\377\377", 5)}, + {1073741824ll, string("\370@\000\000\000", 5)}, + {1073741825ll, string("\370@\000\000\001", 5)}, + {2147483647ll, string("\370\177\377\377\377", 5)}, + {2147483648ll, string("\370\200\000\000\000", 5)}, + {2147483649ll, string("\370\200\000\000\001", 5)}, + {4294967295ll, string("\370\377\377\377\377", 5)}, + {4294967296ll, string("\371\000\000\000\000", 5)}, + {4294967297ll, string("\371\000\000\000\001", 5)}, + {8589934591ll, string("\371\377\377\377\377", 5)}, + {8589934592ll, string("\372\000\000\000\000", 5)}, + {8589934593ll, string("\372\000\000\000\001", 5)}, + {17179869183ll, string("\373\377\377\377\377", 5)}, + {17179869184ll, string("\374\004\000\000\000\000", 6)}, + {17179869185ll, string("\374\004\000\000\000\001", 6)}, + {34359738367ll, string("\374\007\377\377\377\377", 6)}, + {34359738368ll, string("\374\010\000\000\000\000", 6)}, + {34359738369ll, string("\374\010\000\000\000\001", 6)}, + {68719476735ll, string("\374\017\377\377\377\377", 6)}, + {68719476736ll, string("\374\020\000\000\000\000", 6)}, + {68719476737ll, string("\374\020\000\000\000\001", 6)}, + {137438953471ll, string("\374\037\377\377\377\377", 6)}, + {137438953472ll, string("\374 \000\000\000\000", 6)}, + {137438953473ll, string("\374 \000\000\000\001", 6)}, + {274877906943ll, string("\374?\377\377\377\377", 6)}, + {274877906944ll, string("\374@\000\000\000\000", 6)}, + {274877906945ll, string("\374@\000\000\000\001", 6)}, + {549755813887ll, string("\374\177\377\377\377\377", 6)}, + {549755813888ll, string("\374\200\000\000\000\000", 6)}, + {549755813889ll, string("\374\200\000\000\000\001", 6)}, + {1099511627775ll, string("\374\377\377\377\377\377", 6)}, + {1099511627776ll, string("\375\000\000\000\000\000", 6)}, + {1099511627777ll, string("\375\000\000\000\000\001", 6)}, + {2199023255551ll, string("\375\377\377\377\377\377", 6)}, + {2199023255552ll, string("\376\002\000\000\000\000\000", 7)}, + {2199023255553ll, string("\376\002\000\000\000\000\001", 7)}, + {4398046511103ll, string("\376\003\377\377\377\377\377", 7)}, + {4398046511104ll, string("\376\004\000\000\000\000\000", 7)}, + {4398046511105ll, string("\376\004\000\000\000\000\001", 7)}, + {8796093022207ll, string("\376\007\377\377\377\377\377", 7)}, + {8796093022208ll, string("\376\010\000\000\000\000\000", 7)}, + {8796093022209ll, string("\376\010\000\000\000\000\001", 7)}, + {17592186044415ll, string("\376\017\377\377\377\377\377", 7)}, + {17592186044416ll, string("\376\020\000\000\000\000\000", 7)}, + {17592186044417ll, string("\376\020\000\000\000\000\001", 7)}, + {35184372088831ll, string("\376\037\377\377\377\377\377", 7)}, + {35184372088832ll, string("\376 \000\000\000\000\000", 7)}, + {35184372088833ll, string("\376 \000\000\000\000\001", 7)}, + {70368744177663ll, string("\376?\377\377\377\377\377", 7)}, + {70368744177664ll, string("\376@\000\000\000\000\000", 7)}, + {70368744177665ll, string("\376@\000\000\000\000\001", 7)}, + {140737488355327ll, string("\376\177\377\377\377\377\377", 7)}, + {140737488355328ll, string("\376\200\000\000\000\000\000", 7)}, + {140737488355329ll, string("\376\200\000\000\000\000\001", 7)}, + {281474976710655ll, string("\376\377\377\377\377\377\377", 7)}, + {281474976710656ll, string("\377\001\000\000\000\000\000\000", 8)}, + {281474976710657ll, string("\377\001\000\000\000\000\000\001", 8)}, + {562949953421311ll, string("\377\001\377\377\377\377\377\377", 8)}, + {562949953421312ll, string("\377\002\000\000\000\000\000\000", 8)}, + {562949953421313ll, string("\377\002\000\000\000\000\000\001", 8)}, + {1125899906842623ll, string("\377\003\377\377\377\377\377\377", 8)}, + {1125899906842624ll, string("\377\004\000\000\000\000\000\000", 8)}, + {1125899906842625ll, string("\377\004\000\000\000\000\000\001", 8)}, + {2251799813685247ll, string("\377\007\377\377\377\377\377\377", 8)}, + {2251799813685248ll, string("\377\010\000\000\000\000\000\000", 8)}, + {2251799813685249ll, string("\377\010\000\000\000\000\000\001", 8)}, + {4503599627370495ll, string("\377\017\377\377\377\377\377\377", 8)}, + {4503599627370496ll, string("\377\020\000\000\000\000\000\000", 8)}, + {4503599627370497ll, string("\377\020\000\000\000\000\000\001", 8)}, + {9007199254740991ll, string("\377\037\377\377\377\377\377\377", 8)}, + {9007199254740992ll, string("\377 \000\000\000\000\000\000", 8)}, + {9007199254740993ll, string("\377 \000\000\000\000\000\001", 8)}, + {18014398509481983ll, string("\377?\377\377\377\377\377\377", 8)}, + {18014398509481984ll, string("\377@\000\000\000\000\000\000", 8)}, + {18014398509481985ll, string("\377@\000\000\000\000\000\001", 8)}, + {36028797018963967ll, string("\377\177\377\377\377\377\377\377", 8)}, + {36028797018963968ll, string("\377\200\200\000\000\000\000\000\000", 9)}, + {36028797018963969ll, string("\377\200\200\000\000\000\000\000\001", 9)}, + {72057594037927935ll, string("\377\200\377\377\377\377\377\377\377", 9)}, + {72057594037927936ll, string("\377\201\000\000\000\000\000\000\000", 9)}, + {72057594037927937ll, string("\377\201\000\000\000\000\000\000\001", 9)}, + {144115188075855871ll, string("\377\201\377\377\377\377\377\377\377", 9)}, + {144115188075855872ll, string("\377\202\000\000\000\000\000\000\000", 9)}, + {144115188075855873ll, string("\377\202\000\000\000\000\000\000\001", 9)}, + {288230376151711743ll, string("\377\203\377\377\377\377\377\377\377", 9)}, + {288230376151711744ll, string("\377\204\000\000\000\000\000\000\000", 9)}, + {288230376151711745ll, string("\377\204\000\000\000\000\000\000\001", 9)}, + {576460752303423487ll, string("\377\207\377\377\377\377\377\377\377", 9)}, + {576460752303423488ll, string("\377\210\000\000\000\000\000\000\000", 9)}, + {576460752303423489ll, string("\377\210\000\000\000\000\000\000\001", 9)}, + {1152921504606846975ll, + string("\377\217\377\377\377\377\377\377\377", 9)}, + {1152921504606846976ll, + string("\377\220\000\000\000\000\000\000\000", 9)}, + {1152921504606846977ll, + string("\377\220\000\000\000\000\000\000\001", 9)}, + {2305843009213693951ll, + string("\377\237\377\377\377\377\377\377\377", 9)}, + {2305843009213693952ll, + string("\377\240\000\000\000\000\000\000\000", 9)}, + {2305843009213693953ll, + string("\377\240\000\000\000\000\000\000\001", 9)}, + {4611686018427387903ll, + string("\377\277\377\377\377\377\377\377\377", 9)}, + {4611686018427387904ll, + string("\377\300@\000\000\000\000\000\000\000", 10)}, + {4611686018427387905ll, + string("\377\300@\000\000\000\000\000\000\001", 10)}, + {9223372036854775807ll, + string("\377\300\177\377\377\377\377\377\377\377", 10)}, + {-9223372036854775807ll, + string("\000?\200\000\000\000\000\000\000\001", 10)}, + {0ll, string("\200", 1)}, + {-1ll, string("\177", 1)}, + {-2ll, string("~", 1)}, + {-1ll, string("\177", 1)}, + {-2ll, string("~", 1)}, + {-3ll, string("}", 1)}, + {-3ll, string("}", 1)}, + {-4ll, string("|", 1)}, + {-5ll, string("{", 1)}, + {-7ll, string("y", 1)}, + {-8ll, string("x", 1)}, + {-9ll, string("w", 1)}, + {-15ll, string("q", 1)}, + {-16ll, string("p", 1)}, + {-17ll, string("o", 1)}, + {-31ll, string("a", 1)}, + {-32ll, string("`", 1)}, + {-33ll, string("_", 1)}, + {-63ll, string("A", 1)}, + {-64ll, string("@", 1)}, + {-65ll, string("?\277", 2)}, + {-127ll, string("?\201", 2)}, + {-128ll, string("?\200", 2)}, + {-129ll, string("?\177", 2)}, + {-255ll, string("?\001", 2)}, + {-256ll, string("?\000", 2)}, + {-257ll, string(">\377", 2)}, + {-511ll, string(">\001", 2)}, + {-512ll, string(">\000", 2)}, + {-513ll, string("=\377", 2)}, + {-1023ll, string("<\001", 2)}, + {-1024ll, string("<\000", 2)}, + {-1025ll, string(";\377", 2)}, + {-2047ll, string("8\001", 2)}, + {-2048ll, string("8\000", 2)}, + {-2049ll, string("7\377", 2)}, + {-4095ll, string("0\001", 2)}, + {-4096ll, string("0\000", 2)}, + {-4097ll, string("/\377", 2)}, + {-8191ll, string(" \001", 2)}, + {-8192ll, string(" \000", 2)}, + {-8193ll, string("\037\337\377", 3)}, + {-16383ll, string("\037\300\001", 3)}, + {-16384ll, string("\037\300\000", 3)}, + {-16385ll, string("\037\277\377", 3)}, + {-32767ll, string("\037\200\001", 3)}, + {-32768ll, string("\037\200\000", 3)}, + {-32769ll, string("\037\177\377", 3)}, + {-65535ll, string("\037\000\001", 3)}, + {-65536ll, string("\037\000\000", 3)}, + {-65537ll, string("\036\377\377", 3)}, + {-131071ll, string("\036\000\001", 3)}, + {-131072ll, string("\036\000\000", 3)}, + {-131073ll, string("\035\377\377", 3)}, + {-262143ll, string("\034\000\001", 3)}, + {-262144ll, string("\034\000\000", 3)}, + {-262145ll, string("\033\377\377", 3)}, + {-524287ll, string("\030\000\001", 3)}, + {-524288ll, string("\030\000\000", 3)}, + {-524289ll, string("\027\377\377", 3)}, + {-1048575ll, string("\020\000\001", 3)}, + {-1048576ll, string("\020\000\000", 3)}, + {-1048577ll, string("\017\357\377\377", 4)}, + {-2097151ll, string("\017\340\000\001", 4)}, + {-2097152ll, string("\017\340\000\000", 4)}, + {-2097153ll, string("\017\337\377\377", 4)}, + {-4194303ll, string("\017\300\000\001", 4)}, + {-4194304ll, string("\017\300\000\000", 4)}, + {-4194305ll, string("\017\277\377\377", 4)}, + {-8388607ll, string("\017\200\000\001", 4)}, + {-8388608ll, string("\017\200\000\000", 4)}, + {-8388609ll, string("\017\177\377\377", 4)}, + {-16777215ll, string("\017\000\000\001", 4)}, + {-16777216ll, string("\017\000\000\000", 4)}, + {-16777217ll, string("\016\377\377\377", 4)}, + {-33554431ll, string("\016\000\000\001", 4)}, + {-33554432ll, string("\016\000\000\000", 4)}, + {-33554433ll, string("\r\377\377\377", 4)}, + {-67108863ll, string("\014\000\000\001", 4)}, + {-67108864ll, string("\014\000\000\000", 4)}, + {-67108865ll, string("\013\377\377\377", 4)}, + {-134217727ll, string("\010\000\000\001", 4)}, + {-134217728ll, string("\010\000\000\000", 4)}, + {-134217729ll, string("\007\367\377\377\377", 5)}, + {-268435455ll, string("\007\360\000\000\001", 5)}, + {-268435456ll, string("\007\360\000\000\000", 5)}, + {-268435457ll, string("\007\357\377\377\377", 5)}, + {-536870911ll, string("\007\340\000\000\001", 5)}, + {-536870912ll, string("\007\340\000\000\000", 5)}, + {-536870913ll, string("\007\337\377\377\377", 5)}, + {-1073741823ll, string("\007\300\000\000\001", 5)}, + {-1073741824ll, string("\007\300\000\000\000", 5)}, + {-1073741825ll, string("\007\277\377\377\377", 5)}, + {-2147483647ll, string("\007\200\000\000\001", 5)}, + {-2147483648ll, string("\007\200\000\000\000", 5)}, + {-2147483649ll, string("\007\177\377\377\377", 5)}, + {-4294967295ll, string("\007\000\000\000\001", 5)}, + {-4294967296ll, string("\007\000\000\000\000", 5)}, + {-4294967297ll, string("\006\377\377\377\377", 5)}, + {-8589934591ll, string("\006\000\000\000\001", 5)}, + {-8589934592ll, string("\006\000\000\000\000", 5)}, + {-8589934593ll, string("\005\377\377\377\377", 5)}, + {-17179869183ll, string("\004\000\000\000\001", 5)}, + {-17179869184ll, string("\004\000\000\000\000", 5)}, + {-17179869185ll, string("\003\373\377\377\377\377", 6)}, + {-34359738367ll, string("\003\370\000\000\000\001", 6)}, + {-34359738368ll, string("\003\370\000\000\000\000", 6)}, + {-34359738369ll, string("\003\367\377\377\377\377", 6)}, + {-68719476735ll, string("\003\360\000\000\000\001", 6)}, + {-68719476736ll, string("\003\360\000\000\000\000", 6)}, + {-68719476737ll, string("\003\357\377\377\377\377", 6)}, + {-137438953471ll, string("\003\340\000\000\000\001", 6)}, + {-137438953472ll, string("\003\340\000\000\000\000", 6)}, + {-137438953473ll, string("\003\337\377\377\377\377", 6)}, + {-274877906943ll, string("\003\300\000\000\000\001", 6)}, + {-274877906944ll, string("\003\300\000\000\000\000", 6)}, + {-274877906945ll, string("\003\277\377\377\377\377", 6)}, + {-549755813887ll, string("\003\200\000\000\000\001", 6)}, + {-549755813888ll, string("\003\200\000\000\000\000", 6)}, + {-549755813889ll, string("\003\177\377\377\377\377", 6)}, + {-1099511627775ll, string("\003\000\000\000\000\001", 6)}, + {-1099511627776ll, string("\003\000\000\000\000\000", 6)}, + {-1099511627777ll, string("\002\377\377\377\377\377", 6)}, + {-2199023255551ll, string("\002\000\000\000\000\001", 6)}, + {-2199023255552ll, string("\002\000\000\000\000\000", 6)}, + {-2199023255553ll, string("\001\375\377\377\377\377\377", 7)}, + {-4398046511103ll, string("\001\374\000\000\000\000\001", 7)}, + {-4398046511104ll, string("\001\374\000\000\000\000\000", 7)}, + {-4398046511105ll, string("\001\373\377\377\377\377\377", 7)}, + {-8796093022207ll, string("\001\370\000\000\000\000\001", 7)}, + {-8796093022208ll, string("\001\370\000\000\000\000\000", 7)}, + {-8796093022209ll, string("\001\367\377\377\377\377\377", 7)}, + {-17592186044415ll, string("\001\360\000\000\000\000\001", 7)}, + {-17592186044416ll, string("\001\360\000\000\000\000\000", 7)}, + {-17592186044417ll, string("\001\357\377\377\377\377\377", 7)}, + {-35184372088831ll, string("\001\340\000\000\000\000\001", 7)}, + {-35184372088832ll, string("\001\340\000\000\000\000\000", 7)}, + {-35184372088833ll, string("\001\337\377\377\377\377\377", 7)}, + {-70368744177663ll, string("\001\300\000\000\000\000\001", 7)}, + {-70368744177664ll, string("\001\300\000\000\000\000\000", 7)}, + {-70368744177665ll, string("\001\277\377\377\377\377\377", 7)}, + {-140737488355327ll, string("\001\200\000\000\000\000\001", 7)}, + {-140737488355328ll, string("\001\200\000\000\000\000\000", 7)}, + {-140737488355329ll, string("\001\177\377\377\377\377\377", 7)}, + {-281474976710655ll, string("\001\000\000\000\000\000\001", 7)}, + {-281474976710656ll, string("\001\000\000\000\000\000\000", 7)}, + {-281474976710657ll, string("\000\376\377\377\377\377\377\377", 8)}, + {-562949953421311ll, string("\000\376\000\000\000\000\000\001", 8)}, + {-562949953421312ll, string("\000\376\000\000\000\000\000\000", 8)}, + {-562949953421313ll, string("\000\375\377\377\377\377\377\377", 8)}, + {-1125899906842623ll, string("\000\374\000\000\000\000\000\001", 8)}, + {-1125899906842624ll, string("\000\374\000\000\000\000\000\000", 8)}, + {-1125899906842625ll, string("\000\373\377\377\377\377\377\377", 8)}, + {-2251799813685247ll, string("\000\370\000\000\000\000\000\001", 8)}, + {-2251799813685248ll, string("\000\370\000\000\000\000\000\000", 8)}, + {-2251799813685249ll, string("\000\367\377\377\377\377\377\377", 8)}, + {-4503599627370495ll, string("\000\360\000\000\000\000\000\001", 8)}, + {-4503599627370496ll, string("\000\360\000\000\000\000\000\000", 8)}, + {-4503599627370497ll, string("\000\357\377\377\377\377\377\377", 8)}, + {-9007199254740991ll, string("\000\340\000\000\000\000\000\001", 8)}, + {-9007199254740992ll, string("\000\340\000\000\000\000\000\000", 8)}, + {-9007199254740993ll, string("\000\337\377\377\377\377\377\377", 8)}, + {-18014398509481983ll, string("\000\300\000\000\000\000\000\001", 8)}, + {-18014398509481984ll, string("\000\300\000\000\000\000\000\000", 8)}, + {-18014398509481985ll, string("\000\277\377\377\377\377\377\377", 8)}, + {-36028797018963967ll, string("\000\200\000\000\000\000\000\001", 8)}, + {-36028797018963968ll, string("\000\200\000\000\000\000\000\000", 8)}, + {-36028797018963969ll, string("\000\177\177\377\377\377\377\377\377", 9)}, + {-72057594037927935ll, string("\000\177\000\000\000\000\000\000\001", 9)}, + {-72057594037927936ll, string("\000\177\000\000\000\000\000\000\000", 9)}, + {-72057594037927937ll, string("\000~\377\377\377\377\377\377\377", 9)}, + {-144115188075855871ll, string("\000~\000\000\000\000\000\000\001", 9)}, + {-144115188075855872ll, string("\000~\000\000\000\000\000\000\000", 9)}, + {-144115188075855873ll, string("\000}\377\377\377\377\377\377\377", 9)}, + {-288230376151711743ll, string("\000|\000\000\000\000\000\000\001", 9)}, + {-288230376151711744ll, string("\000|\000\000\000\000\000\000\000", 9)}, + {-288230376151711745ll, string("\000{\377\377\377\377\377\377\377", 9)}, + {-576460752303423487ll, string("\000x\000\000\000\000\000\000\001", 9)}, + {-576460752303423488ll, string("\000x\000\000\000\000\000\000\000", 9)}, + {-576460752303423489ll, string("\000w\377\377\377\377\377\377\377", 9)}, + {-1152921504606846975ll, string("\000p\000\000\000\000\000\000\001", 9)}, + {-1152921504606846976ll, string("\000p\000\000\000\000\000\000\000", 9)}, + {-1152921504606846977ll, string("\000o\377\377\377\377\377\377\377", 9)}, + {-2305843009213693951ll, string("\000`\000\000\000\000\000\000\001", 9)}, + {-2305843009213693952ll, string("\000`\000\000\000\000\000\000\000", 9)}, + {-2305843009213693953ll, string("\000_\377\377\377\377\377\377\377", 9)}, + {-4611686018427387903ll, string("\000@\000\000\000\000\000\000\001", 9)}, + {-4611686018427387904ll, string("\000@\000\000\000\000\000\000\000", 9)}, + {-4611686018427387905ll, + string("\000?\277\377\377\377\377\377\377\377", 10)}, + {-9223372036854775807ll, + string("\000?\200\000\000\000\000\000\000\001", 10)}, + {9223372036854775807ll, + string("\377\300\177\377\377\377\377\377\377\377", 10)}, + }; + for (const auto& t : data) { + int64 num = t.first; + string result; + OrderedCode::WriteSignedNumIncreasing(&result, num); + EXPECT_EQ(t.second, result) << std::hex << num; + + StringPiece in = result; + int64 decoded; + EXPECT_TRUE(OrderedCode::ReadSignedNumIncreasing(&in, &decoded)); + EXPECT_EQ(num, decoded); + EXPECT_EQ("", in); + } +} + +static void BM_WriteString(int n, int len) { + testing::StopTiming(); + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + string x; + for (int i = 0; i < len; i++) { + x += rnd.Uniform(256); + } + string y; + + testing::BytesProcessed(n * len); + testing::StartTiming(); + while (n-- > 0) { + y.clear(); + OCWriteToString<string>(&y, x); + } +} + +static void BM_ReadString(int n, int len) { + testing::StopTiming(); + random::PhiloxRandom philox(301, 17); + random::SimplePhilox rnd(&philox); + string x; + for (int i = 0; i < len; i++) { + x += rnd.Uniform(256); + } + string data; + OCWriteToString<string>(&data, x); + string result; + + testing::BytesProcessed(n * len); + testing::StartTiming(); + while (n-- > 0) { + result.clear(); + StringPiece s = data; + OCRead<string>(&s, &result); + } +} + +static void BM_WriteStringIncreasing(int n, int len) { BM_WriteString(n, len); } +static void BM_ReadStringIncreasing(int n, int len) { BM_ReadString(n, len); } + +BENCHMARK(BM_WriteStringIncreasing)->Range(0, 1024); +BENCHMARK(BM_ReadStringIncreasing)->Range(0, 1024); + +} // namespace strings +} // namespace tensorflow |