library/cpp/tld/tld.h


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#pragma once

#include <util/generic/strbuf.h>

namespace NTld {
    const char* const* GetTlds(); 

    // Note that FindTld() returns empty string when @host is single domain label (without '.'). 
    // If you need whole @host for such case, you can use GetZone() from library/cpp/string_utils/url/url.h
    inline TStringBuf FindTld(const TStringBuf& host) { 
        size_t p = host.rfind('.'); 
        return p != TStringBuf::npos ? host.SubStr(p + 1) : TStringBuf(); 
    } 

    bool IsTld(const TStringBuf& tld); 

    inline bool InTld(const TStringBuf& host) { 
        return IsTld(FindTld(host)); 
    } 

    // check if @s belongs to a "good" subset of reliable TLDs, defined in tld.cpp 
    bool IsVeryGoodTld(const TStringBuf& tld); 

    inline bool InVeryGoodTld(const TStringBuf& host) { 
        return IsVeryGoodTld(FindTld(host)); 
    } 

}