typedef enum { ... } SilcStringprepStatus;

    Status and errors returned by silc_stringprep.

    typedef enum {
      SILC_STRINGPREP_OK,                     /* Preparation success */
      SILC_STRINGPREP_ERR_UNASSIGNED,         /* Contains unassigned characters */
      SILC_STRINGPREP_ERR_PROHIBITED,         /* Contains prohibited characters */
      SILC_STRINGPREP_ERR_BIDI_PROHIBITED,    /* BIDI contains prohibited chars */
      SILC_STRINGPREP_ERR_BIDI_RAL_WITH_L,    /* BIDI has both R/AL and L */
      SILC_STRINGPREP_ERR_BIDI_RAL,           /* BIDI has R/AL but not as leading
                                                 and/or trailing character. */
      SILC_STRINGPREP_ERR_OUT_OF_MEMORY,      /* System out of memory */
      SILC_STRINGPREP_ERR_ENCODING,           /* Character encoding error */
      SILC_STRINGPREP_ERR_UNSUP_ENCODING,     /* Unsupported character encoding  */
      SILC_STRINGPREP_ERR_UNSUP_PROFILE,      /* Unsupported profile */
      SILC_STRINGPREP_ERR,                    /* Unknown error */
    } SilcStringprepStatus;