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82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
#pragma once
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#include <common/find_symbols.h>
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#include "domain.h"
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#include "tldLookup.h"
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namespace DB
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{
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struct ExtractFirstSignificantSubdomain
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{
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static size_t getReserveLengthForElement() { return 10; }
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static void execute(const Pos data, const size_t size, Pos & res_data, size_t & res_size, Pos * out_domain_end = nullptr)
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{
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res_data = data;
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res_size = 0;
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Pos tmp;
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size_t domain_length;
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ExtractDomain<true>::execute(data, size, tmp, domain_length);
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if (domain_length == 0)
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return;
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if (out_domain_end)
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*out_domain_end = tmp + domain_length;
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/// cut useless dot
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if (tmp[domain_length - 1] == '.')
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--domain_length;
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res_data = tmp;
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res_size = domain_length;
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auto begin = tmp;
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auto end = begin + domain_length;
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const char * last_3_periods[3]{};
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auto pos = find_first_symbols<'.'>(begin, end);
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while (pos < end)
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{
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last_3_periods[2] = last_3_periods[1];
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last_3_periods[1] = last_3_periods[0];
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last_3_periods[0] = pos;
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pos = find_first_symbols<'.'>(pos + 1, end);
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}
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if (!last_3_periods[0])
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return;
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if (!last_3_periods[1])
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{
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res_size = last_3_periods[0] - begin;
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return;
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}
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if (!last_3_periods[2])
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last_3_periods[2] = begin - 1;
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auto end_of_level_domain = find_first_symbols<'/'>(last_3_periods[0], end);
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if (!end_of_level_domain)
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{
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end_of_level_domain = end;
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}
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if (tldLookup::isValid(last_3_periods[1] + 1, end_of_level_domain - last_3_periods[1] - 1) != nullptr)
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{
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res_data += last_3_periods[2] + 1 - begin;
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res_size = last_3_periods[1] - last_3_periods[2] - 1;
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}
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else
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{
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res_data += last_3_periods[1] + 1 - begin;
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res_size = last_3_periods[0] - last_3_periods[1] - 1;
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}
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}
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};
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}
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