typedef enum { ... } SilcStringEncoding;

    String encoding definitions used with various string manipulation
    routines.  By default, applications are suggested to use
    SILC_STRING_LOCALE since it encodes and decodes correctly according
    to local system language and character set (locale).

    typedef enum {
      SILC_STRING_ASCII         = 0,  /* Any 8 bit ASCII encoding (default) */
      SILC_STRING_ASCII_ESC     = 1,  /* 7 bit ASCII (>0x7f escaped) */
      SILC_STRING_BMP           = 2,  /* 16 bit, UCS-2, BMP, ISO/IEC 10646 */
      SILC_STRING_BMP_LSB       = 3,  /* BMP, least significant byte first */
      SILC_STRING_UNIVERSAL     = 4,  /* 32 bit, UCS-4, Universal, ISO/IEC 10646 */
      SILC_STRING_UNIVERSAL_LSB = 5,  /* Universal, least significant byte first */
      SILC_STRING_LOCALE        = 6,  /* A locale specific conversion on
                                         those platforms that support iconv().
                                         Fallback is SILC_STRING_ASCII. */
      SILC_STRING_UTF8          = 7,  /* UTF-8 encoding */
      SILC_STRING_PRINTABLE     = 8,  /* Printable ASCII (no escaping) */
      SILC_STRING_VISIBLE       = 9,  /* Visible ASCII string */
      SILC_STRING_TELETEX       = 10, /* Teletex ASCII string */
      SILC_STRING_NUMERICAL     = 11, /* Numerical ASCII string (digits) */
      SILC_STRING_LDAP_DN       = 12, /* Strings for LDAP DNs, RFC 2253 */
      SILC_STRING_UTF8_ESCAPE   = 12, /* Escaped UTF-8 as defined in RFC 2253 */
    
      SILC_STRING_LANGUAGE      = 6,  /* _Deprecated_, use SILC_STRING_LOCALE. */
    } SilcStringEncoding;