monotone

monotone Mtn Source Tree

Root/idna/punycode.h

1/* punycode.hDeclarations for punycode functions.
2 * Copyright (C) 2002, 2003 Simon Josefsson
3 *
4 * This file is part of GNU Libidn.
5 *
6 * GNU Libidn is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * GNU Libidn is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with GNU Libidn; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22/*
23 * This file is derived from RFC 3492bis written by Adam M. Costello.
24 *
25 * Disclaimer and license: Regarding this entire document or any
26 * portion of it (including the pseudocode and C code), the author
27 * makes no guarantees and is not responsible for any damage resulting
28 * from its use. The author grants irrevocable permission to anyone
29 * to use, modify, and distribute it in any way that does not diminish
30 * the rights of anyone else to use, modify, and distribute it,
31 * provided that redistributed derivative works do not contain
32 * misleading author or version information. Derivative works need
33 * not be licensed under similar terms.
34 *
35 * Copyright (C) The Internet Society (2003). All Rights Reserved.
36 *
37 * This document and translations of it may be copied and furnished to
38 * others, and derivative works that comment on or otherwise explain it
39 * or assist in its implementation may be prepared, copied, published
40 * and distributed, in whole or in part, without restriction of any
41 * kind, provided that the above copyright notice and this paragraph are
42 * included on all such copies and derivative works. However, this
43 * document itself may not be modified in any way, such as by removing
44 * the copyright notice or references to the Internet Society or other
45 * Internet organizations, except as needed for the purpose of
46 * developing Internet standards in which case the procedures for
47 * copyrights defined in the Internet Standards process must be
48 * followed, or as required to translate it into languages other than
49 * English.
50 *
51 * The limited permissions granted above are perpetual and will not be
52 * revoked by the Internet Society or its successors or assigns.
53 *
54 * This document and the information contained herein is provided on an
55 * "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
56 * TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
57 * BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
58 * HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
59 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
60 */
61
62#ifndef _PUNYCODE_H
63#define _PUNYCODE_H
64
65#ifdef __cplusplus
66extern "C"
67{
68#endif
69
70#include <stddef.h>/* size_t */
71#include "idna/idn-int.h"/* uint32_t */
72
73 enum punycode_status
74 {
75 punycode_success = 0,
76 punycode_bad_input = 1,/* Input is invalid. */
77 punycode_big_output = 2,/* Output would exceed the space provided. */
78 punycode_overflow = 3/* Wider integers needed to process input. */
79 };
80
81 typedef enum
82 {
83 PUNYCODE_SUCCESS = punycode_success,
84 PUNYCODE_BAD_INPUT = punycode_bad_input,
85 PUNYCODE_BIG_OUTPUT = punycode_big_output,
86 PUNYCODE_OVERFLOW = punycode_overflow
87 } Punycode_status;
88
89/* punycode_uint needs to be unsigned and needs to be */
90/* at least 26 bits wide. */
91
92 typedef uint32_t punycode_uint;
93
94 extern int punycode_encode (size_t input_length,
95 const punycode_uint input[],
96 const unsigned char case_flags[],
97 size_t * output_length, char output[]);
98
99/*
100 punycode_encode() converts a sequence of code points (presumed to be
101 Unicode code points) to Punycode.
102
103 Input arguments (to be supplied by the caller):
104
105 input_length
106 The number of code points in the input array and the number
107 of flags in the case_flags array.
108
109 input
110 An array of code points. They are presumed to be Unicode
111 code points, but that is not strictly REQUIRED. The
112 array contains code points, not code units. UTF-16 uses
113 code units D800 through DFFF to refer to code points
114 10000..10FFFF. The code points D800..DFFF do not occur in
115 any valid Unicode string. The code points that can occur in
116 Unicode strings (0..D7FF and E000..10FFFF) are also called
117 Unicode scalar values.
118
119 case_flags
120 A null pointer or an array of boolean values parallel to
121 the input array. Nonzero (true, flagged) suggests that the
122 corresponding Unicode character be forced to uppercase after
123 being decoded (if possible), and zero (false, unflagged)
124 suggests that it be forced to lowercase (if possible).
125 ASCII code points (0..7F) are encoded literally, except that
126 ASCII letters are forced to uppercase or lowercase according
127 to the corresponding case flags. If case_flags is a null
128 pointer then ASCII letters are left as they are, and other
129 code points are treated as unflagged.
130
131 Output arguments (to be filled in by the function):
132
133 output
134 An array of ASCII code points. It is *not* null-terminated;
135 it will contain zeros if and only if the input contains
136 zeros. (Of course the caller can leave room for a
137 terminator and add one if needed.)
138
139 Input/output arguments (to be supplied by the caller and overwritten
140 by the function):
141
142 output_length
143 The caller passes in the maximum number of ASCII code points
144 that it can receive. On successful return it will contain
145 the number of ASCII code points actually output.
146
147 Return value:
148
149 Can be any of the punycode_status values defined above except
150 punycode_bad_input. If not punycode_success, then output_size
151 and output might contain garbage.
152*/
153
154 extern int punycode_decode (size_t input_length,
155 const char input[],
156 size_t * output_length,
157 punycode_uint output[],
158 unsigned char case_flags[]);
159
160/*
161 punycode_decode() converts Punycode to a sequence of code points
162 (presumed to be Unicode code points).
163
164 Input arguments (to be supplied by the caller):
165
166 input_length
167 The number of ASCII code points in the input array.
168
169 input
170 An array of ASCII code points (0..7F).
171
172 Output arguments (to be filled in by the function):
173
174 output
175 An array of code points like the input argument of
176 punycode_encode() (see above).
177
178 case_flags
179 A null pointer (if the flags are not needed by the caller)
180 or an array of boolean values parallel to the output array.
181 Nonzero (true, flagged) suggests that the corresponding
182 Unicode character be forced to uppercase by the caller (if
183 possible), and zero (false, unflagged) suggests that it
184 be forced to lowercase (if possible). ASCII code points
185 (0..7F) are output already in the proper case, but their
186 flags will be set appropriately so that applying the flags
187 would be harmless.
188
189 Input/output arguments (to be supplied by the caller and overwritten
190 by the function):
191
192 output_length
193 The caller passes in the maximum number of code points
194 that it can receive into the output array (which is also
195 the maximum number of flags that it can receive into the
196 case_flags array, if case_flags is not a null pointer). On
197 successful return it will contain the number of code points
198 actually output (which is also the number of flags actually
199 output, if case_flags is not a null pointer). The decoder
200 will never need to output more code points than the number
201 of ASCII code points in the input, because of the way the
202 encoding is defined. The number of code points output
203 cannot exceed the maximum possible value of a punycode_uint,
204 even if the supplied output_length is greater than that.
205
206 Return value:
207
208 Can be any of the punycode_status values defined above. If not
209 punycode_success, then output_length, output, and case_flags
210 might contain garbage.
211*/
212
213#ifdef __cplusplus
214}
215#endif
216#endif/* _PUNYCODE_H */

Archive Download this file

Branches

Tags

Quick Links:     www.monotone.ca    -     Downloads    -     Documentation    -     Wiki    -     Code Forge    -     Build Status