intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 28 insertions, 0 deletions

diff --git a/library/cpp/tld/tld.h b/library/cpp/tld/tld.h
new file mode 100644
index 00000000000..9e241de090b
--- /dev/null
+++ b/library/cpp/tld/tld.h
@@ -0,0 +1,28 @@
+#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));
+    }
+
+}