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should be it

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Mars Ultor
2025-10-24 19:21:19 -05:00
parent a4b23fc57c
commit f09560c7b1
14047 changed files with 3161551 additions and 1 deletions
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83
external/duckdb/test/api/test_bignum.cpp vendored Normal file
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#include "test_helpers.hpp"
#include "duckdb/common/types/bignum.hpp"
#include "catch.hpp"
using namespace duckdb;
using namespace std;
TEST_CASE("Test Bignum::FromByteArray", "[api]") {
{ // 0
uint8_t data[] {0};
idx_t size = 1;
bool is_negative = false;
auto str = Bignum::FromByteArray(data, size, is_negative);
REQUIRE(str.size() == size + 3);
REQUIRE(uint8_t(str[0]) == 0x80);
REQUIRE(uint8_t(str[1]) == 0x00);
REQUIRE(uint8_t(str[2]) == uint8_t(size));
for (idx_t i = 0; i < size; i++) {
REQUIRE(uint8_t(str[3 + i]) == data[i]);
}
}
{ // -1
uint8_t data[] {1};
idx_t size = 1;
bool is_negative = true;
auto str = Bignum::FromByteArray(data, size, is_negative);
REQUIRE(str.size() == size + 3);
REQUIRE(uint8_t(str[0]) == 0x7f);
REQUIRE(uint8_t(str[1]) == 0xff);
REQUIRE(uint8_t(str[2]) == uint8_t(~size));
for (idx_t i = 0; i < size; i++) {
REQUIRE(uint8_t(str[3 + i]) == uint8_t(~data[i]));
}
}
{ // max bignum == max double == 2^1023 * (1 + (1 − 2^−52)) == 2^1024 - 2^971 ==
// 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368
uint8_t data[] {
// little endian
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
idx_t size = 128;
bool is_negative = false;
auto str = Bignum::FromByteArray(data, size, is_negative);
REQUIRE(str.size() == size + 3);
REQUIRE(uint8_t(str[0]) == 0x80);
REQUIRE(uint8_t(str[1]) == 0x00);
REQUIRE(uint8_t(str[2]) == uint8_t(size));
for (idx_t i = 0; i < size; i++) {
REQUIRE(uint8_t(str[3 + i]) == data[i]);
}
}
{ // min bignum == min double == -(2^1023 * (1 + (1 − 2^−52))) == -(2^1024 - 2^971) ==
// -179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368
uint8_t data[] {
// little endian (absolute value)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
idx_t size = 128;
bool is_negative = true;
auto str = Bignum::FromByteArray(data, size, is_negative);
REQUIRE(str.size() == size + 3);
REQUIRE(uint8_t(str[0]) == 0x7f);
REQUIRE(uint8_t(str[1]) == 0xff);
REQUIRE(uint8_t(str[2]) == uint8_t(~size));
for (idx_t i = 0; i < size; i++) {
REQUIRE(uint8_t(str[3 + i]) == uint8_t(~data[i]));
}
}
}