/* idn2.h - header file for idn2
   Copyright (C) 2011-2017 Simon Josefsson

   Libidn2 is free software: you can redistribute it and/or modify it
   under the terms of either:

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at
       your option) any later version.

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at
       your option) any later version.

   or both in parallel, as here.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received copies of the GNU General Public License and
   the GNU Lesser General Public License along with this program.  If
   not, see <http://www.gnu.org/licenses/>.
*/

#ifndef _IDN2_H
#define _IDN2_H

/* *INDENT-OFF* */
#ifndef _IDN2_API
# if defined IDN2_BUILDING && defined HAVE_VISIBILITY && HAVE_VISIBILITY
#  define _IDN2_API __attribute__((__visibility__("default")))
# elif defined IDN2_BUILDING && defined _MSC_VER && ! defined IDN2_STATIC
#  define _IDN2_API __declspec(dllexport)
# elif defined _MSC_VER && ! defined IDN2_STATIC
#  define _IDN2_API __declspec(dllimport)
# else
#  define _IDN2_API
# endif
#endif
/* *INDENT-ON* */

#include <stdint.h>		/* uint32_t */
#include <string.h>		/* size_t */

#ifdef __cplusplus
extern "C"
{
#endif

/**
 * IDN2_VERSION
 *
 * 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.
 */
#define IDN2_VERSION "0.16"

/**
 * IDN2_VERSION_NUMBER
 *
 * 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.
 */
#define IDN2_VERSION_NUMBER 0x00160000

/**
 * IDN2_LABEL_MAX_LENGTH
 *
 * Constant specifying the maximum length of a DNS label to 63
 * characters, as specified in RFC 1034.
 */
#define IDN2_LABEL_MAX_LENGTH 63

/**
 * IDN2_DOMAIN_MAX_LENGTH
 *
 * 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.
 */
#define IDN2_DOMAIN_MAX_LENGTH 255

/**
 * idn2_flags:
 * @IDN2_NFC_INPUT: Normalize input string using normalization form C.
 * @IDN2_ALABEL_ROUNDTRIP: Perform optional IDNA2008 lookup roundtrip check.
 * @IDN2_TRANSITIONAL: Perform Unicode TR46 transitional processing.
 * @IDN2_NONTRANSITIONAL: Perform Unicode TR46 non-transitional processing.
 *
 * Flags to IDNA2008 functions, to be binary or:ed together.  Specify
 * only 0 if you want the default behaviour.
 */
  typedef enum
  {
    IDN2_NFC_INPUT = 1,
    IDN2_ALABEL_ROUNDTRIP = 2,
    IDN2_TRANSITIONAL = 4,
    IDN2_NONTRANSITIONAL = 8,
  } idn2_flags;

/* IDNA2008 with UTF-8 encoded inputs. */

  extern _IDN2_API int
    idn2_lookup_u8 (const uint8_t * src, uint8_t ** lookupname, int flags);

  extern _IDN2_API int
    idn2_register_u8 (const uint8_t * ulabel, const uint8_t * alabel,
		      uint8_t ** insertname, int flags);

/* IDNA2008 with locale encoded inputs. */

  extern _IDN2_API int
    idn2_lookup_ul (const char *src, char **lookupname, int flags);

  extern _IDN2_API int
    idn2_register_ul (const char *ulabel, const char *alabel,
		      char **insertname, int flags);

/**
 * idn2_rc:
 * @IDN2_OK: Successful return.
 * @IDN2_MALLOC: Memory allocation error.
 * @IDN2_NO_CODESET: Could not determine locale string encoding format.
 * @IDN2_ICONV_FAIL: Could not transcode locale string to UTF-8.
 * @IDN2_ENCODING_ERROR: Unicode data encoding error.
 * @IDN2_NFC: Error normalizing string.
 * @IDN2_PUNYCODE_BAD_INPUT: Punycode invalid input.
 * @IDN2_PUNYCODE_BIG_OUTPUT: Punycode output buffer too small.
 * @IDN2_PUNYCODE_OVERFLOW: Punycode conversion would overflow.
 * @IDN2_TOO_BIG_DOMAIN: Domain name longer than 255 characters.
 * @IDN2_TOO_BIG_LABEL: Domain label longer than 63 characters.
 * @IDN2_INVALID_ALABEL: Input A-label is not valid.
 * @IDN2_UALABEL_MISMATCH: Input A-label and U-label does not match.
 * @IDN2_INVALID_FLAGS: Invalid combination of flags.
 * @IDN2_NOT_NFC: String is not NFC.
 * @IDN2_2HYPHEN: String has forbidden two hyphens.
 * @IDN2_HYPHEN_STARTEND: String has forbidden starting/ending hyphen.
 * @IDN2_LEADING_COMBINING: String has forbidden leading combining character.
 * @IDN2_DISALLOWED: String has disallowed character.
 * @IDN2_CONTEXTJ: String has forbidden context-j character.
 * @IDN2_CONTEXTJ_NO_RULE: String has context-j character with no rull.
 * @IDN2_CONTEXTO: String has forbidden context-o character.
 * @IDN2_CONTEXTO_NO_RULE: String has context-o character with no rull.
 * @IDN2_UNASSIGNED: String has forbidden unassigned character.
 * @IDN2_BIDI: String has forbidden bi-directional properties.
 * @IDN2_DOT_IN_LABEL: Label has forbidden dot (TR46).
 * @IDN2_INVALID_TRANSITIONAL: Label has character forbidden in transitional mode (TR46).
 * @IDN2_INVALID_NONTRANSITIONAL: Label has character forbidden in non-transitional mode (TR46).
 *
 * Return codes for IDN2 functions.  All return codes are negative
 * except for the successful code IDN2_OK which are guaranteed to be
 * 0.  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.
 */
  typedef enum
  {
    IDN2_OK = 0,
    IDN2_MALLOC = -100,
    IDN2_NO_CODESET = -101,
    IDN2_ICONV_FAIL = -102,
    IDN2_ENCODING_ERROR = -200,
    IDN2_NFC = -201,
    IDN2_PUNYCODE_BAD_INPUT = -202,
    IDN2_PUNYCODE_BIG_OUTPUT = -203,
    IDN2_PUNYCODE_OVERFLOW = -204,
    IDN2_TOO_BIG_DOMAIN = -205,
    IDN2_TOO_BIG_LABEL = -206,
    IDN2_INVALID_ALABEL = -207,
    IDN2_UALABEL_MISMATCH = -208,
    IDN2_INVALID_FLAGS = -209,
    IDN2_NOT_NFC = -300,
    IDN2_2HYPHEN = -301,
    IDN2_HYPHEN_STARTEND = -302,
    IDN2_LEADING_COMBINING = -303,
    IDN2_DISALLOWED = -304,
    IDN2_CONTEXTJ = -305,
    IDN2_CONTEXTJ_NO_RULE = -306,
    IDN2_CONTEXTO = -307,
    IDN2_CONTEXTO_NO_RULE = -308,
    IDN2_UNASSIGNED = -309,
    IDN2_BIDI = -310,
    IDN2_DOT_IN_LABEL = -311,
    IDN2_INVALID_TRANSITIONAL = -312,
    IDN2_INVALID_NONTRANSITIONAL = -313,
  } idn2_rc;

/* Auxilliary functions. */

  extern _IDN2_API const char *idn2_strerror (int rc);
  extern _IDN2_API const char *idn2_strerror_name (int rc);

  extern _IDN2_API const char *idn2_check_version (const char *req_version);

  extern _IDN2_API void idn2_free (void *ptr);

#ifdef __cplusplus
}
#endif

#endif				/* _IDN2_H */
