diff options
| author | Devtools Arcadia <arcadia-devtools@yandex-team.ru> | 2022-02-07 18:08:42 +0300 |
|---|---|---|
| committer | Devtools Arcadia <arcadia-devtools@mous.vla.yp-c.yandex.net> | 2022-02-07 18:08:42 +0300 |
| commit | 1110808a9d39d4b808aef724c861a2e1a38d2a69 (patch) | |
| tree | e26c9fed0de5d9873cce7e00bc214573dc2195b7 /library/cpp/unicode/punycode/punycode.h | |
| download | ydb-1110808a9d39d4b808aef724c861a2e1a38d2a69.tar.gz | |
intermediate changes
ref:cde9a383711a11544ce7e107a78147fb96cc4029
Diffstat (limited to 'library/cpp/unicode/punycode/punycode.h')
| -rw-r--r-- | library/cpp/unicode/punycode/punycode.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/library/cpp/unicode/punycode/punycode.h b/library/cpp/unicode/punycode/punycode.h new file mode 100644 index 0000000000..af4acc25c1 --- /dev/null +++ b/library/cpp/unicode/punycode/punycode.h @@ -0,0 +1,46 @@ +#pragma once + +#include <util/generic/string.h> +#include <util/generic/strbuf.h> +#include <util/generic/yexception.h> + +// Simplified arcadia wrappers for contrib/libs/libidn/ + +// Raw strings encoder/decoder: does not prepend with ACE prefix ("xn--"), +// does not limit input length. Throws TPunycodeError on any internal error. +// Returned strbuf points to @out data. +TStringBuf WideToPunycode(const TWtringBuf& in, TString& out); +TWtringBuf PunycodeToWide(const TStringBuf& in, TUtf16String& out); + +inline TString WideToPunycode(const TWtringBuf& in) { + TString out; + WideToPunycode(in, out); + return out; +} + +inline TUtf16String PunycodeToWide(const TStringBuf& in) { + TUtf16String out; + PunycodeToWide(in, out); + return out; +} + +// Encode a sequence of point-separated domain labels +// into a sequence of corresponding punycode labels. +// Labels containing non-ASCII characters are prefixed with ACE prefix ("xn--"). +// Limits maximal encoded domain label length to IDNA_LABEL_MAX_LENGTH (255 by default). +// Throws TPunycodeError on failure. +TString HostNameToPunycode(const TWtringBuf& unicodeHost); +TUtf16String PunycodeToHostName(const TStringBuf& punycodeHost); + +// Robust versions: on failure return original input, converted to/from UTF8 +TString ForceHostNameToPunycode(const TWtringBuf& unicodeHost); +TUtf16String ForcePunycodeToHostName(const TStringBuf& punycodeHost); + +// True if @host looks like punycode domain label sequence, +// containing at least one ACE-prefixed label. +// Note that this function does not check all requied IDNA constraints +// (max label length, empty non-root domains, etc.) +bool CanBePunycodeHostName(const TStringBuf& host); + +class TPunycodeError: public yexception { +}; |