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Functions
#define | GCC_VERSION_AT_LEAST() |
int | idn2_lookup_u8 () |
int | idn2_register_u8 () |
int | idn2_lookup_ul () |
int | idn2_register_ul () |
int | idn2_to_ascii_4i () |
int | idn2_to_ascii_4i2 () |
int | idn2_to_ascii_4z () |
int | idn2_to_ascii_8z () |
int | idn2_to_ascii_lz () |
int | idn2_to_unicode_8z4z () |
int | idn2_to_unicode_4z4z () |
int | idn2_to_unicode_44i () |
int | idn2_to_unicode_8z8z () |
int | idn2_to_unicode_8zlz () |
int | idn2_to_unicode_lzlz () |
int | idn2_punycode_encode () |
int | idn2_punycode_decode () |
const char * | idn2_strerror () |
const char * | idn2_strerror_name () |
const char * | idn2_check_version () |
void | idn2_free () |
Types and Values
#define | G_GNUC_IDN2_ATTRIBUTE_PURE |
#define | G_GNUC_IDN2_ATTRIBUTE_CONST |
#define | G_GNUC_UNUSED |
#define | IDN2_VERSION |
#define | IDN2_VERSION_NUMBER |
#define | IDN2_VERSION_MAJOR |
#define | IDN2_VERSION_MINOR |
#define | IDN2_VERSION_PATCH |
#define | IDN2_LABEL_MAX_LENGTH |
#define | IDN2_DOMAIN_MAX_LENGTH |
enum | idn2_flags |
enum | idn2_rc |
Functions
GCC_VERSION_AT_LEAST()
# define GCC_VERSION_AT_LEAST(major, minor) ((__GNUC__ > (major)) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
Pre-processor symbol to check the gcc version.
idn2_lookup_u8 ()
int idn2_lookup_u8 (const uint8_t *src
,uint8_t **lookupname
,int flags
);
Perform IDNA2008 lookup string conversion on domain name src
, as
described in section 5 of RFC 5891. Note that the input string
must be encoded in UTF-8 and be in Unicode NFC form.
Pass IDN2_NFC_INPUT
in flags
to convert input to NFC form before
further processing. IDN2_TRANSITIONAL
and IDN2_NONTRANSITIONAL
do already imply IDN2_NFC_INPUT
.
Pass IDN2_ALABEL_ROUNDTRIP
in flags
to
convert any input A-labels to U-labels and perform additional
testing. This is default since version 2.2.
To switch this behavior off, pass IDN2_NO_ALABEL_ROUNDTRIP
Pass IDN2_TRANSITIONAL
to enable Unicode TR46
transitional processing, and IDN2_NONTRANSITIONAL
to enable
Unicode TR46 non-transitional processing.
Multiple flags may be specified by binary or:ing them together.
After version 2.0.3: IDN2_USE_STD3_ASCII_RULES
disabled by default.
Previously we were eliminating non-STD3 characters from domain strings
such as _443._tcp.example.com, or IPs 1.2.3.4/24 provided to libidn2
functions. That was an unexpected regression for applications switching
from libidn and thus it is no longer applied by default.
Use IDN2_USE_STD3_ASCII_RULES
to enable that behavior again.
After version 0.11: lookupname
may be NULL to test lookup of src
without allocating memory.
Parameters
src |
input zero-terminated UTF-8 string in Unicode NFC normalized form. |
|
lookupname |
newly allocated output variable with name to lookup in DNS. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned, if the
output domain or any label would have been too long
IDN2_TOO_BIG_DOMAIN
or IDN2_TOO_BIG_LABEL
is returned, or
another error code is returned.
Since: 0.1
idn2_register_u8 ()
int idn2_register_u8 (const uint8_t *ulabel
,const uint8_t *alabel
,uint8_t **insertname
,int flags
);
Perform IDNA2008 register string conversion on domain label ulabel
and alabel
, as described in section 4 of RFC 5891. Note that the
input ulabel
must be encoded in UTF-8 and be in Unicode NFC form.
Pass IDN2_NFC_INPUT
in flags
to convert input ulabel
to NFC form
before further processing.
It is recommended to supply both ulabel
and alabel
for better
error checking, but supplying just one of them will work. Passing
in only alabel
is better than only ulabel
. See RFC 5891 section
4 for more information.
After version 0.11: insertname
may be NULL to test conversion of src
without allocating memory.
Parameters
ulabel |
input zero-terminated UTF-8 and Unicode NFC string, or NULL. |
|
alabel |
input zero-terminated ACE encoded string (xn--), or NULL. |
|
insertname |
newly allocated output variable with name to register in DNS. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned, when the
given ulabel
and alabel
does not match each other
IDN2_UALABEL_MISMATCH
is returned, when either of the input
labels are too long IDN2_TOO_BIG_LABEL
is returned, when alabel
does does not appear to be a proper A-label IDN2_INVALID_ALABEL
is returned, or another error code is returned.
idn2_lookup_ul ()
int idn2_lookup_ul (const char *src
,char **lookupname
,int flags
);
Perform IDNA2008 lookup string conversion on domain name src
, as
described in section 5 of RFC 5891. Note that the input is assumed
to be encoded in the locale's default coding system, and will be
transcoded to UTF-8 and NFC normalized by this function.
Pass IDN2_ALABEL_ROUNDTRIP
in flags
to
convert any input A-labels to U-labels and perform additional
testing. This is default since version 2.2.
To switch this behavior off, pass IDN2_NO_ALABEL_ROUNDTRIP
Pass IDN2_TRANSITIONAL
to enable Unicode TR46 transitional processing,
and IDN2_NONTRANSITIONAL
to enable Unicode TR46 non-transitional
processing.
Multiple flags may be specified by binary or:ing them together, for
example IDN2_ALABEL_ROUNDTRIP
| IDN2_NONTRANSITIONAL
.
The IDN2_NFC_INPUT
in flags
is always enabled in this function.
After version 0.11: lookupname
may be NULL to test lookup of src
without allocating memory.
Parameters
src |
input zero-terminated locale encoded string. |
|
lookupname |
newly allocated output variable with name to lookup in DNS. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned, if
conversion from locale to UTF-8 fails then IDN2_ICONV_FAIL
is
returned, if the output domain or any label would have been too
long IDN2_TOO_BIG_DOMAIN
or IDN2_TOO_BIG_LABEL
is returned, or
another error code is returned.
Since: 0.1
idn2_register_ul ()
int idn2_register_ul (const char *ulabel
,const char *alabel
,char **insertname
,int flags
);
Perform IDNA2008 register string conversion on domain label ulabel
and alabel
, as described in section 4 of RFC 5891. Note that the
input ulabel
is assumed to be encoded in the locale's default
coding system, and will be transcoded to UTF-8 and NFC normalized
by this function.
It is recommended to supply both ulabel
and alabel
for better
error checking, but supplying just one of them will work. Passing
in only alabel
is better than only ulabel
. See RFC 5891 section
4 for more information.
After version 0.11: insertname
may be NULL to test conversion of src
without allocating memory.
Parameters
ulabel |
input zero-terminated locale encoded string, or NULL. |
|
alabel |
input zero-terminated ACE encoded string (xn--), or NULL. |
|
insertname |
newly allocated output variable with name to register in DNS. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned, when the
given ulabel
and alabel
does not match each other
IDN2_UALABEL_MISMATCH
is returned, when either of the input
labels are too long IDN2_TOO_BIG_LABEL
is returned, when alabel
does does not appear to be a proper A-label IDN2_INVALID_ALABEL
is returned, when ulabel
locale to UTF-8 conversion failed
IDN2_ICONV_FAIL
is returned, or another error code is returned.
idn2_to_ascii_4i ()
int idn2_to_ascii_4i (const uint32_t *input
,size_t inlen
,char *output
,int flags
);
The ToASCII operation takes a sequence of Unicode code points that make up one domain label and transforms it into a sequence of code points in the ASCII range (0..7F). If ToASCII succeeds, the original sequence and the resulting sequence are equivalent labels.
It is important to note that the ToASCII operation can fail. ToASCII fails if any step of it fails. If any step of the ToASCII operation fails on any label in a domain name, that domain name MUST NOT be used as an internationalized domain name. The method for dealing with this failure is application-specific.
The inputs to ToASCII are a sequence of code points.
ToASCII never alters a sequence of code points that are all in the ASCII range to begin with (although it could fail). Applying the ToASCII operation multiple effect as applying it just once.
The default behavior of this function (when flags are zero) is to apply
the IDNA2008 rules without the TR46 amendments. As the TR46
non-transitional processing is nowadays ubiquitous, when unsure, it is
recommended to call this function with the IDN2_NONTRANSITIONAL
and the IDN2_NFC_INPUT
flags for compatibility with other software.
Warning: With version 2.1.1 until before version 2.3.5 this
function was deprecated in favor idn2_to_ascii_4i2()
. We still
encourage you to use idn2_to_ascii_4i2()
when appropriate.
Parameters
input |
zero terminated input Unicode (UCS-4) string. |
|
inlen |
number of elements in |
|
output |
output zero terminated string that must have room for at least 63 characters plus the terminating zero. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned; if the
output label would have been too long IDN2_TOO_BIG_LABEL
is
returned, or another error code is returned.
Since: 2.0.0
idn2_to_ascii_4i2 ()
int idn2_to_ascii_4i2 (const uint32_t *input
,size_t inlen
,char **output
,int flags
);
The ToASCII operation takes a sequence of Unicode code points that make up one domain label and transforms it into a sequence of code points in the ASCII range (0..7F). If ToASCII succeeds, the original sequence and the resulting sequence are equivalent labels.
It is important to note that the ToASCII operation can fail. ToASCII fails if any step of it fails. If any step of the ToASCII operation fails on any label in a domain name, that domain name MUST NOT be used as an internationalized domain name. The method for dealing with this failure is application-specific.
The inputs to ToASCII are a sequence of code points.
ToASCII never alters a sequence of code points that are all in the ASCII range to begin with (although it could fail). Applying the ToASCII operation multiple effect as applying it just once.
The default behavior of this function (when flags are zero) is to apply
the IDNA2008 rules without the TR46 amendments. As the TR46
non-transitional processing is nowadays ubiquitous, when unsure, it is
recommended to call this function with the IDN2_NONTRANSITIONAL
and the IDN2_NFC_INPUT
flags for compatibility with other software.
Parameters
input |
zero terminated input Unicode (UCS-4) string. |
|
inlen |
number of elements in |
|
output |
pointer to newly allocated zero-terminated output string. |
|
flags |
optional idn2_flags to modify behaviour. |
Returns
On successful conversion IDN2_OK
is returned; if the
output label would have been too long IDN2_TOO_BIG_LABEL
is
returned, or another error code is returned.
Since: 2.1.1
idn2_to_ascii_4z ()
int idn2_to_ascii_4z (const uint32_t *input
,char **output
,int flags
);
Convert UCS-4 domain name to ASCII string using the IDNA2008 rules. The domain name may contain several labels, separated by dots. The output buffer must be deallocated by the caller.
The default behavior of this function (when flags are zero) is to apply
the IDNA2008 rules without the TR46 amendments. As the TR46
non-transitional processing is nowadays ubiquitous, when unsure, it is
recommended to call this function with the IDN2_NONTRANSITIONAL
and the IDN2_NFC_INPUT
flags for compatibility with other software.
Parameters
input |
zero terminated input Unicode (UCS-4) string. |
|
output |
pointer to newly allocated zero-terminated output string. |
|
flags |
optional idn2_flags to modify behaviour. |
Since: 2.0.0
idn2_to_ascii_8z ()
int idn2_to_ascii_8z (const char *input
,char **output
,int flags
);
Convert UTF-8 domain name to ASCII string using the IDNA2008 rules. The domain name may contain several labels, separated by dots. The output buffer must be deallocated by the caller.
The default behavior of this function (when flags are zero) is to apply
the IDNA2008 rules without the TR46 amendments. As the TR46
non-transitional processing is nowadays ubiquitous, when unsure, it is
recommended to call this function with the IDN2_NONTRANSITIONAL
and the IDN2_NFC_INPUT
flags for compatibility with other software.
Parameters
input |
zero terminated input UTF-8 string. |
|
output |
pointer to newly allocated output string. |
|
flags |
optional idn2_flags to modify behaviour. |
Since: 2.0.0
idn2_to_ascii_lz ()
int idn2_to_ascii_lz (const char *input
,char **output
,int flags
);
Convert a domain name in locale's encoding to ASCII string using the IDNA2008 rules. The domain name may contain several labels, separated by dots. The output buffer must be deallocated by the caller.
The default behavior of this function (when flags are zero) is to apply
the IDNA2008 rules without the TR46 amendments. As the TR46
non-transitional processing is nowadays ubiquitous, when unsure, it is
recommended to call this function with the IDN2_NONTRANSITIONAL
and the IDN2_NFC_INPUT
flags for compatibility with other software.
Parameters
input |
zero terminated input UTF-8 string. |
|
output |
pointer to newly allocated output string. |
|
flags |
optional idn2_flags to modify behaviour. |
Since: 2.0.0
idn2_to_unicode_8z4z ()
int idn2_to_unicode_8z4z (const char *input
,uint32_t **output
,int flags
);
Converts a possibly ACE encoded domain name in UTF-8 format into a UTF-32 string (punycode decoding). The output buffer will be zero-terminated and must be deallocated by the caller.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
input |
Input zero-terminated UTF-8 string. |
|
output |
Newly allocated UTF-32/UCS-4 output string. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_to_unicode_4z4z ()
int idn2_to_unicode_4z4z (const uint32_t *input
,uint32_t **output
,int flags
);
Converts a possibly ACE encoded domain name in UTF-32 format into a UTF-32 string (punycode decoding). The output buffer will be zero-terminated and must be deallocated by the caller.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
input |
Input zero-terminated UTF-32 string. |
|
output |
Newly allocated UTF-32 output string. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_to_unicode_44i ()
int idn2_to_unicode_44i (const uint32_t *in
,size_t inlen
,uint32_t *out
,size_t *outlen
,int flags
);
The ToUnicode operation takes a sequence of UTF-32 code points that make up one domain label and returns a sequence of UTF-32 code points. If the input sequence is a label in ACE form, then the result is an equivalent internationalized label that is not in ACE form, otherwise the original sequence is returned unaltered.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
in |
Input array with UTF-32 code points. |
|
inlen |
number of code points of input array |
|
out |
output array with UTF-32 code points. |
|
outlen |
on input, maximum size of output array with UTF-32 code points, on exit, actual size of output array with UTF-32 code points. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_to_unicode_8z8z ()
int idn2_to_unicode_8z8z (const char *input
,char **output
,int flags
);
Converts a possibly ACE encoded domain name in UTF-8 format into a UTF-8 string (punycode decoding). The output buffer will be zero-terminated and must be deallocated by the caller.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
input |
Input zero-terminated UTF-8 string. |
|
output |
Newly allocated UTF-8 output string. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_to_unicode_8zlz ()
int idn2_to_unicode_8zlz (const char *input
,char **output
,int flags
);
Converts a possibly ACE encoded domain name in UTF-8 format into a string encoded in the current locale's character set (punycode decoding). The output buffer will be zero-terminated and must be deallocated by the caller.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
input |
Input zero-terminated UTF-8 string. |
|
output |
Newly allocated output string in current locale's character set. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_to_unicode_lzlz ()
int idn2_to_unicode_lzlz (const char *input
,char **output
,int flags
);
Converts a possibly ACE encoded domain name in the locale's character set into a string encoded in the current locale's character set (punycode decoding). The output buffer will be zero-terminated and must be deallocated by the caller.
output
may be NULL to test lookup of input
without allocating memory.
Parameters
input |
Input zero-terminated string encoded in the current locale's character set. |
|
output |
Newly allocated output string in current locale's character set. |
|
flags |
Currently unused. |
Returns
IDN2_OK
: The conversion was successful.
IDN2_TOO_BIG_DOMAIN
: The domain is too long.
IDN2_TOO_BIG_LABEL
: A label is would have been too long.
IDN2_ENCODING_ERROR
: Output character conversion failed.
IDN2_ICONV_FAIL
: Input character conversion failed.
IDN2_MALLOC
: Memory allocation failed.
Since: 2.0.0
idn2_punycode_encode ()
int idn2_punycode_encode (const uint32_t *input
,size_t input_length
,char *output
,size_t *output_length
);
Converts a sequence of code points to Punycode.
Warning: Be aware that is rare for applications to need to perform
Punycode operations, and you should consider idn2_to_ascii_8z()
,
idn2_to_ascii_lz()
, idn2_to_ascii_4z()
etc.
Parameters
input |
array of input Unicode (UCS-4) code points |
|
input_length |
number of code points in the |
|
output |
output character array with ASCII code points. |
|
output_length |
size of |
Returns
On successful encoding IDN2_OK
is returned, or an error
codes like IDN2_PUNYCODE_BAD_INPUT
, IDN2_PUNYCODE_BIG_OUTPUT
,
or IDN2_PUNYCODE_OVERFLOW
.
Since: 2.3.5
idn2_punycode_decode ()
int idn2_punycode_decode (const char *input
,size_t input_length
,uint32_t *output
,size_t *output_length
);
Converts Punycode to a sequence of code points.
The decoder will never need to output more code points than the number of ASCII code points in the input, because of the way the encoding is defined.
The number of code points output cannot exceed the maximum possible
value of a uint32_t, even if the supplied output_length
is greater
than that.
Warning: Be aware that is rare for applications to need to perform
Punycode operations, and you should consider
idn2_to_unicode_8z8z()
, idn2_to_unicode_lzlz()
etc.
Parameters
input |
array of ASCII characters (0..7F) |
|
input_length |
Number of ASCII characters in the |
|
output |
output character array with ASCII code points. |
|
output_length |
on input, guarantee that |
Returns
On successful encoding IDN2_OK
is returned, or an error
codes like IDN2_PUNYCODE_BAD_INPUT
, IDN2_PUNYCODE_BIG_OUTPUT
,
or IDN2_PUNYCODE_OVERFLOW
.
Since: 2.3.5
idn2_strerror ()
const char *
idn2_strerror (int rc
);
Convert internal libidn2 error code to a humanly readable string. The returned pointer must not be de-allocated by the caller.
idn2_strerror_name ()
const char *
idn2_strerror_name (int rc
);
Convert internal libidn2 error code to a string corresponding to internal header file symbols. For example, idn2_strerror_name(IDN2_MALLOC) will return the string "IDN2_MALLOC".
The caller must not attempt to de-allocate the returned string.
idn2_check_version ()
const char *
idn2_check_version (const char *req_version
);
Check IDN2 library version. This function can also be used to read
out the version of the library code used. See IDN2_VERSION
for a
suitable req_version
string, it corresponds to the idn2.h header
file version. Normally these two version numbers match, but if you
are using an application built against an older libidn2 with a
newer libidn2 shared library they will be different.
Types and Values
G_GNUC_IDN2_ATTRIBUTE_PURE
# define G_GNUC_IDN2_ATTRIBUTE_PURE __attribute__ ((pure))
Function attribute: Function is a pure function.
G_GNUC_IDN2_ATTRIBUTE_CONST
# define G_GNUC_IDN2_ATTRIBUTE_CONST __attribute__ ((const))
Function attribute: Function is a const function.
G_GNUC_UNUSED
# define G_GNUC_UNUSED __attribute__ ((__unused__))
Parameter attribute: Parameter is not used.
IDN2_VERSION
# define IDN2_VERSION "2.3.7"
Pre-processor symbol with a string that describe the header file
version number. Used together with idn2_check_version()
to verify
header file and run-time library consistency.
IDN2_VERSION_NUMBER
# define IDN2_VERSION_NUMBER 0x02030007
Pre-processor symbol with a hexadecimal value describing the header file version number. For example, when the header version is 1.2.4711 this symbol will have the value 0x01021267. The last four digits are used to enumerate development snapshots, but for all public releases they will be 0000.
IDN2_VERSION_MAJOR
# define IDN2_VERSION_MAJOR 2
Pre-processor symbol for the major version number (decimal). The version scheme is major.minor.patchlevel.
IDN2_VERSION_MINOR
# define IDN2_VERSION_MINOR 3
Pre-processor symbol for the minor version number (decimal). The version scheme is major.minor.patchlevel.
IDN2_VERSION_PATCH
# define IDN2_VERSION_PATCH 7
Pre-processor symbol for the patch level number (decimal). The version scheme is major.minor.patchlevel.
IDN2_LABEL_MAX_LENGTH
# define IDN2_LABEL_MAX_LENGTH 63
Constant specifying the maximum length of a DNS label to 63 characters, as specified in RFC 1034.
IDN2_DOMAIN_MAX_LENGTH
# define IDN2_DOMAIN_MAX_LENGTH 255
Constant specifying the maximum size of the wire encoding of a DNS domain to 255 characters, as specified in RFC 1034. Note that the usual printed representation of a domain name is limited to 253 characters if it does not end with a period, or 254 characters if it ends with a period.
enum idn2_flags
Flags to IDNA2008 functions, to be binary or:ed together. Specify only 0 if you want the default behaviour.
Members
Normalize input string using normalization form C. |
||
Perform optional IDNA2008 lookup roundtrip check (default). |
||
Perform Unicode TR46 transitional processing. |
||
Perform Unicode TR46 non-transitional processing (default). |
||
Libidn compatibility flag, unused. |
||
Use STD3 ASCII rules.
This is a Unicode TR46 only flag, and will be ignored when set without
either |
||
Disable Unicode TR46 processing. |
||
Disable ALabel lookup roundtrip check. |
enum idn2_rc
Return codes for IDN2 functions. All return codes are negative except for the successful code IDN2_OK which are guaranteed to be
Positive values are reserved for non-error return codes.
Note that the idn2_rc enumeration may be extended at a later date to include new return codes.
Members
Successful return. |
||
Memory allocation error. |
||
Could not determine locale string encoding format. |
||
Could not transcode locale string to UTF-8. |
||
Unicode data encoding error. |
||
Error normalizing string. |
||
Punycode invalid input. |
||
Punycode output buffer too small. |
||
Punycode conversion would overflow. |
||
Domain name longer than 255 characters. |
||
Domain label longer than 63 characters. |
||
Input A-label is not valid. |
||
Input A-label and U-label does not match. |
||
Invalid combination of flags. |
||
String is not NFC. |
||
String has forbidden two hyphens. |
||
String has forbidden starting/ending hyphen. |
||
String has forbidden leading combining character. |
||
String has disallowed character. |
||
String has forbidden context-j character. |
||
String has context-j character with no rull. |
||
String has forbidden context-o character. |
||
String has context-o character with no rull. |
||
String has forbidden unassigned character. |
||
String has forbidden bi-directional properties. |
||
Label has forbidden dot (TR46). |
||
Label has character forbidden in transitional mode (TR46). |
||
Label has character forbidden in non-transitional mode (TR46). |
||
ALabel -> Ulabel -> ALabel result differs from input. |