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63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
/// \author Леонид Юрьев aka Leonid Yuriev <leo@yuriev.ru> \date 2015-2024
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/// \copyright SPDX-License-Identifier: Apache-2.0
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#include "mdbx.h++"
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#include <iostream>
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#include <unistd.h>
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int main(int argc, const char *argv[]) {
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(void)argc;
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(void)argv;
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unlink("." MDBX_DATANAME);
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unlink("." MDBX_LOCKNAME);
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mdbx::env_managed env(".", mdbx::env_managed::create_parameters(),
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mdbx::env::operate_parameters());
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using buffer =
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mdbx::buffer<mdbx::default_allocator, mdbx::default_capacity_policy>;
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auto txn = env.start_write();
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auto map = txn.create_map(nullptr, mdbx::key_mode::ordinal,
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mdbx::value_mode::single);
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#if 0 /* workaround */
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txn.commit();
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env.close();
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env = mdbx::env_managed(".", mdbx::env_managed::create_parameters(),
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mdbx::env::operate_parameters());
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txn = env.start_write();
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#endif
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txn.insert(map, buffer::key_from_u64(UINT64_C(8) << 8 * 0), buffer("a"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(7) << 8 * 1), buffer("b"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(6) << 8 * 2), buffer("c"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(5) << 8 * 3), buffer("d"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(4) << 8 * 4), buffer("e"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(3) << 8 * 5), buffer("f"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(2) << 8 * 6), buffer("g"));
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txn.insert(map, buffer::key_from_u64(UINT64_C(1) << 8 * 7), buffer("h"));
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txn.commit();
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txn = env.start_read();
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auto cursor = txn.open_cursor(map);
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#if defined(__cpp_lib_string_view) && __cpp_lib_string_view >= 201606L
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if (cursor.to_first().value.string_view() == "a" &&
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cursor.to_next().value.string_view() == "b" &&
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cursor.to_next().value.string_view() == "c" &&
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cursor.to_next().value.string_view() == "d" &&
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cursor.to_next().value.string_view() == "e" &&
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cursor.to_next().value.string_view() == "f" &&
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cursor.to_next().value.string_view() == "g" &&
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cursor.to_next().value.string_view() == "h" &&
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!cursor.to_next(false).done && cursor.eof()) {
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std::cout << "OK\n";
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return EXIT_SUCCESS;
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}
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std::cerr << "Fail\n";
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return EXIT_FAILURE;
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#else
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std::cerr << "Skipped since no std::string_view\n";
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return EXIT_SUCCESS;
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#endif /* __cpp_lib_string_view >= 201606L */
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}
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