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/* punycode.h Declarations for punycode functions.
* Copyright (C) 2002, 2003 Simon Josefsson
*
* This file is part of GNU Libidn.
*
* GNU Libidn is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* GNU Libidn 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GNU Libidn; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*
* This file is derived from RFC 3492 written by Adam M. Costello.
*
* Disclaimer and license: Regarding this entire document or any
* portion of it (including the pseudocode and C code), the author
* makes no guarantees and is not responsible for any damage resulting
* from its use. The author grants irrevocable permission to anyone
* to use, modify, and distribute it in any way that does not diminish
* the rights of anyone else to use, modify, and distribute it,
* provided that redistributed derivative works do not contain
* misleading author or version information. Derivative works need
* not be licensed under similar terms.
*
* Copyright (C) The Internet Society (2003). All Rights Reserved.
*
* This document and translations of it may be copied and furnished to
* others, and derivative works that comment on or otherwise explain it
* or assist in its implementation may be prepared, copied, published
* and distributed, in whole or in part, without restriction of any
* kind, provided that the above copyright notice and this paragraph are
* included on all such copies and derivative works. However, this
* document itself may not be modified in any way, such as by removing
* the copyright notice or references to the Internet Society or other
* Internet organizations, except as needed for the purpose of
* developing Internet standards in which case the procedures for
* copyrights defined in the Internet Standards process must be
* followed, or as required to translate it into languages other than
* English.
*
* The limited permissions granted above are perpetual and will not be
* revoked by the Internet Society or its successors or assigns.
*
* This document and the information contained herein is provided on an
* "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
* TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
* HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef _PUNYCODE_H
#define _PUNYCODE_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <stddef.h> /* size_t */
#include <libidn/idn-int.h> /* my_uint32_t */
typedef enum
{
PUNYCODE_SUCCESS = 0,
PUNYCODE_BAD_INPUT, /* Input is invalid. */
PUNYCODE_BIG_OUTPUT, /* Output would exceed the space provided. */
PUNYCODE_OVERFLOW /* Input needs wider integers to process. */
} Punycode_status;
/* For RFC compatibility. */
enum punycode_status
{
punycode_success = PUNYCODE_SUCCESS,
punycode_bad_input = PUNYCODE_BAD_INPUT,
punycode_big_output = PUNYCODE_BIG_OUTPUT,
punycode_overflow = PUNYCODE_OVERFLOW
};
typedef my_uint32_t punycode_uint;
int punycode_encode (size_t input_length,
const punycode_uint input[],
const unsigned char case_flags[],
size_t * output_length, char output[]);
/* punycode_encode() converts Unicode to Punycode. The input */
/* is represented as an array of Unicode code points (not code */
/* units; surrogate pairs are not allowed), and the output */
/* will be represented as an array of ASCII code points. The */
/* output string is *not* null-terminated; it will contain */
/* zeros if and only if the input contains zeros. (Of course */
/* the caller can leave room for a terminator and add one if */
/* needed.) The input_length is the number of code points in */
/* the input. The output_length is an in/out argument: the */
/* caller passes in the maximum number of code points that it */
/* can receive, and on successful return it will contain the */
/* number of code points actually output. The case_flags array */
/* holds input_length boolean values, where nonzero suggests that */
/* the corresponding Unicode character be forced to uppercase */
/* after being decoded (if possible), and zero suggests that */
/* it be forced to lowercase (if possible). ASCII code points */
/* are encoded literally, except that ASCII letters are forced */
/* to uppercase or lowercase according to the corresponding */
/* uppercase flags. If case_flags is a null pointer then ASCII */
/* letters are left as they are, and other code points are */
/* treated as if their uppercase flags were zero. The return */
/* value can be any of the punycode_status values defined above */
/* except punycode_bad_input; if not punycode_success, then */
/* output_size and output might contain garbage. */
int punycode_decode (size_t input_length,
const char input[],
size_t * output_length,
punycode_uint output[], unsigned char case_flags[]);
/* punycode_decode() converts Punycode to Unicode. The input is */
/* represented as an array of ASCII code points, and the output */
/* will be represented as an array of Unicode code points. The */
/* input_length is the number of code points in the input. The */
/* output_length is an in/out argument: the caller passes in */
/* the maximum number of code points that it can receive, and */
/* on successful return it will contain the actual number of */
/* code points output. The case_flags array needs room for at */
/* least output_length values, or it can be a null pointer if the */
/* case information is not needed. A nonzero flag suggests that */
/* the corresponding Unicode character be forced to uppercase */
/* by the caller (if possible), while zero suggests that it be */
/* forced to lowercase (if possible). ASCII code points are */
/* output already in the proper case, but their flags will be set */
/* appropriately so that applying the flags would be harmless. */
/* The return value can be any of the punycode_status values */
/* defined above; if not punycode_success, then output_length, */
/* output, and case_flags might contain garbage. On success, the */
/* decoder will never need to write an output_length greater than */
/* input_length, because of how the encoding is defined. */
#ifdef __cplusplus
}
#endif
#endif /* _PUNYCODE_H */
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