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idna_strerror(3) libidn idna_strerror(3) NAME idna_strerror - API function SYNOPSIS #include <idna.h> const char * idna_strerror(Idna_rc rc); ARGUMENTS Idna_rc rc an Idna_rc return code. DESCRIPTION Convert a return code integer to a text string. This string can be used to output a diagnostic message to the user. IDNA_SUCCESS 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_STRINGPREP_ERROR Error during string preparation. IDNA_PUNYCODE_ERROR Error during punycode operation. IDNA_CONTAINS_NON_LDH For IDNA_USE_STD3_ASCII_RULES, indicate that the string contains non-LDH ASCII characters. IDNA_CONTAINS_MINUS For IDNA_USE_STD3_ASCII_RULES, indicate that the string contains a leading or trailing hyphen-minus (U+002D). IDNA_INVALID_LENGTH The final output string is not within the (inclusive) range 1 to 63 characters. IDNA_NO_ACE_PREFIX The string does not contain the ACE prefix (for ToUnicode). IDNA_ROUNDTRIP_VERIFY_ERROR The ToASCII operation on output string does not equal the input. IDNA_CONTAINS_ACE_PREFIX The input contains the ACE prefix (for ToASCII). IDNA_ICONV_ERROR Character encoding conversion error. IDNA_MALLOC_ERROR Could not allocate buffer (this is typically a fatal error). IDNA_DLOPEN_ERROR Could not dlopen the libcidn DSO (only used internally in libc). Return value: Returns a pointer to a statically allocated string con- taining a description of the error with the return code rc . REPORTING BUGS 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/ COPYRIGHT Copyright (C) 2002-2025 Simon Josefsson. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright no- tice and this notice are preserved. SEE ALSO 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 info libidn 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)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | IDNA_SUCCESS | IDNA_STRINGPREP_ERROR | IDNA_PUNYCODE_ERROR | IDNA_CONTAINS_NON_LDH | IDNA_CONTAINS_MINUS | IDNA_INVALID_LENGTH | IDNA_NO_ACE_PREFIX | IDNA_ROUNDTRIP_VERIFY_ERROR | IDNA_CONTAINS_ACE_PREFIX | IDNA_ICONV_ERROR | IDNA_MALLOC_ERROR | IDNA_DLOPEN_ERROR | REPORTING BUGS | COPYRIGHT | SEE ALSO
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