idna_strerror - API function

Idna_rc rc an Idna_rc return code.

Copyright © 2002-2025 Simon Josefsson. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

Convert a return code integer to a text string. This string can be used to output a diagnostic message to the user.

The input contains the ACE prefix (for ToASCII).

For IDNA_USE_STD3_ASCII_RULES, indicate that the string contains a leading or trailing hyphen-minus (U+002D).

For IDNA_USE_STD3_ASCII_RULES, indicate that the string contains non-LDH ASCII characters.

Could not dlopen the libcidn DSO (only used internally in libc). Return value: Returns a pointer to a statically allocated string containing a description of the error with the return code rc .

Character encoding conversion error.

The final output string is not within the (inclusive) range 1 to 63 characters.

Could not allocate buffer (this is typically a fatal error).

The string does not contain the ACE prefix (for ToUnicode).

Error during punycode operation.

The ToASCII operation on output string does not equal the input.

Error during string preparation.

Successful operation. This value is guaranteed to always be zero, the remaining ones are only guaranteed to hold non-zero values, for logical comparison purposes.

idna_strerror - API function

Report bugs to <help-libidn@gnu.org>. General guidelines for reporting bugs: https://www.gnu.org/gethelp/ GNU Libidn home page: https://www.gnu.org/software/libidn/

The full documentation for libidn is maintained as a Texinfo manual. If the info and libidn programs are properly installed at your site, the command infolibidn should give you access to the complete manual. As an alternative you may obtain the manual from: https://www.gnu.org/software/libidn/manual/ libidn 1.43 idna_strerror(3)