1 | /* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
---|
2 | This file is part of the GNU C Library. |
---|
3 | |
---|
4 | The GNU C Library is free software; you can redistribute it and/or |
---|
5 | modify it under the terms of the GNU Lesser General Public |
---|
6 | License as published by the Free Software Foundation; either |
---|
7 | version 2.1 of the License, or (at your option) any later version. |
---|
8 | |
---|
9 | The GNU C Library is distributed in the hope that it will be useful, |
---|
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
12 | Lesser General Public License for more details. |
---|
13 | |
---|
14 | You should have received a copy of the GNU Lesser General Public |
---|
15 | License along with the GNU C Library; if not, write to the Free |
---|
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
---|
17 | 02111-1307 USA. */ |
---|
18 | |
---|
19 | /* This header provides no interface for a user to the internals of |
---|
20 | the gconv implementation in the libc. Therefore there is no use |
---|
21 | for these definitions beside for writing additional gconv modules. */ |
---|
22 | |
---|
23 | #ifndef _GCONV_H |
---|
24 | #define _GCONV_H 1 |
---|
25 | |
---|
26 | #include <features.h> |
---|
27 | #define __need_mbstate_t |
---|
28 | #include <wchar.h> |
---|
29 | #define __need_size_t |
---|
30 | #define __need_wchar_t |
---|
31 | #include <stddef.h> |
---|
32 | |
---|
33 | /* ISO 10646 value used to signal invalid value. */ |
---|
34 | #define __UNKNOWN_10646_CHAR ((wchar_t) 0xfffd) |
---|
35 | |
---|
36 | /* Error codes for gconv functions. */ |
---|
37 | enum |
---|
38 | { |
---|
39 | __GCONV_OK = 0, |
---|
40 | __GCONV_NOCONV, |
---|
41 | __GCONV_NODB, |
---|
42 | __GCONV_NOMEM, |
---|
43 | |
---|
44 | __GCONV_EMPTY_INPUT, |
---|
45 | __GCONV_FULL_OUTPUT, |
---|
46 | __GCONV_ILLEGAL_INPUT, |
---|
47 | __GCONV_INCOMPLETE_INPUT, |
---|
48 | |
---|
49 | __GCONV_ILLEGAL_DESCRIPTOR, |
---|
50 | __GCONV_INTERNAL_ERROR |
---|
51 | }; |
---|
52 | |
---|
53 | |
---|
54 | /* Flags the `__gconv_open' function can set. */ |
---|
55 | enum |
---|
56 | { |
---|
57 | __GCONV_IS_LAST = 0x0001, |
---|
58 | __GCONV_IGNORE_ERRORS = 0x0002 |
---|
59 | }; |
---|
60 | |
---|
61 | |
---|
62 | /* Forward declarations. */ |
---|
63 | struct __gconv_step; |
---|
64 | struct __gconv_step_data; |
---|
65 | struct __gconv_loaded_object; |
---|
66 | struct __gconv_trans_data; |
---|
67 | |
---|
68 | |
---|
69 | /* Type of a conversion function. */ |
---|
70 | typedef int (*__gconv_fct) (struct __gconv_step *, struct __gconv_step_data *, |
---|
71 | __const unsigned char **, __const unsigned char *, |
---|
72 | unsigned char **, size_t *, int, int); |
---|
73 | |
---|
74 | /* Constructor and destructor for local data for conversion step. */ |
---|
75 | typedef int (*__gconv_init_fct) (struct __gconv_step *); |
---|
76 | typedef void (*__gconv_end_fct) (struct __gconv_step *); |
---|
77 | |
---|
78 | |
---|
79 | /* Type of a transliteration/transscription function. */ |
---|
80 | typedef int (*__gconv_trans_fct) (struct __gconv_step *, |
---|
81 | struct __gconv_step_data *, void *, |
---|
82 | __const unsigned char *, |
---|
83 | __const unsigned char **, |
---|
84 | __const unsigned char *, unsigned char **, |
---|
85 | size_t *); |
---|
86 | |
---|
87 | /* Function to call to provide transliteration module with context. */ |
---|
88 | typedef int (*__gconv_trans_context_fct) (void *, __const unsigned char *, |
---|
89 | __const unsigned char *, |
---|
90 | unsigned char *, unsigned char *); |
---|
91 | |
---|
92 | /* Function to query module about supported encoded character sets. */ |
---|
93 | typedef int (*__gconv_trans_query_fct) (__const char *, __const char ***, |
---|
94 | size_t *); |
---|
95 | |
---|
96 | /* Constructor and destructor for local data for transliteration. */ |
---|
97 | typedef int (*__gconv_trans_init_fct) (void **, const char *); |
---|
98 | typedef void (*__gconv_trans_end_fct) (void *); |
---|
99 | |
---|
100 | struct __gconv_trans_data |
---|
101 | { |
---|
102 | /* Transliteration/Transscription function. */ |
---|
103 | __gconv_trans_fct __trans_fct; |
---|
104 | __gconv_trans_context_fct __trans_context_fct; |
---|
105 | __gconv_trans_end_fct __trans_end_fct; |
---|
106 | void *__data; |
---|
107 | struct __gconv_trans_data *__next; |
---|
108 | }; |
---|
109 | |
---|
110 | |
---|
111 | /* Description of a conversion step. */ |
---|
112 | struct __gconv_step |
---|
113 | { |
---|
114 | struct __gconv_loaded_object *__shlib_handle; |
---|
115 | __const char *__modname; |
---|
116 | |
---|
117 | int __counter; |
---|
118 | |
---|
119 | char *__from_name; |
---|
120 | char *__to_name; |
---|
121 | |
---|
122 | __gconv_fct __fct; |
---|
123 | __gconv_init_fct __init_fct; |
---|
124 | __gconv_end_fct __end_fct; |
---|
125 | |
---|
126 | /* Information about the number of bytes needed or produced in this |
---|
127 | step. This helps optimizing the buffer sizes. */ |
---|
128 | int __min_needed_from; |
---|
129 | int __max_needed_from; |
---|
130 | int __min_needed_to; |
---|
131 | int __max_needed_to; |
---|
132 | |
---|
133 | /* Flag whether this is a stateful encoding or not. */ |
---|
134 | int __stateful; |
---|
135 | |
---|
136 | void *__data; /* Pointer to step-local data. */ |
---|
137 | }; |
---|
138 | |
---|
139 | /* Additional data for steps in use of conversion descriptor. This is |
---|
140 | allocated by the `init' function. */ |
---|
141 | struct __gconv_step_data |
---|
142 | { |
---|
143 | unsigned char *__outbuf; /* Output buffer for this step. */ |
---|
144 | unsigned char *__outbufend; /* Address of first byte after the output |
---|
145 | buffer. */ |
---|
146 | |
---|
147 | /* Is this the last module in the chain. */ |
---|
148 | int __flags; |
---|
149 | |
---|
150 | /* Counter for number of invocations of the module function for this |
---|
151 | descriptor. */ |
---|
152 | int __invocation_counter; |
---|
153 | |
---|
154 | /* Flag whether this is an internal use of the module (in the mb*towc* |
---|
155 | and wc*tomb* functions) or regular with iconv(3). */ |
---|
156 | int __internal_use; |
---|
157 | |
---|
158 | mbstate_t *__statep; |
---|
159 | mbstate_t __state; /* This element must not be used directly by |
---|
160 | any module; always use STATEP! */ |
---|
161 | |
---|
162 | /* Transliteration information. */ |
---|
163 | struct __gconv_trans_data *__trans; |
---|
164 | }; |
---|
165 | |
---|
166 | |
---|
167 | /* Combine conversion step description with data. */ |
---|
168 | typedef struct __gconv_info |
---|
169 | { |
---|
170 | size_t __nsteps; |
---|
171 | struct __gconv_step *__steps; |
---|
172 | __extension__ struct __gconv_step_data __data __flexarr; |
---|
173 | } *__gconv_t; |
---|
174 | |
---|
175 | #endif /* gconv.h */ |
---|