1 /* Copyright (C) 1997-1999, 2000-2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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
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. */
27 #define __need_mbstate_t
30 #define __need_wchar_t
33 /* ISO 10646 value used to signal invalid value. */
34 #define __UNKNOWN_10646_CHAR ((wchar_t) 0xfffd)
36 /* Error codes for gconv functions. */
46 __GCONV_ILLEGAL_INPUT,
47 __GCONV_INCOMPLETE_INPUT,
49 __GCONV_ILLEGAL_DESCRIPTOR,
50 __GCONV_INTERNAL_ERROR
54 /* Flags the `__gconv_open' function can set. */
57 __GCONV_IS_LAST = 0x0001,
58 __GCONV_IGNORE_ERRORS = 0x0002
62 /* Forward declarations. */
64 struct __gconv_step_data;
65 struct __gconv_loaded_object;
66 struct __gconv_trans_data;
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);
74 /* Type of a specialized conversion function for a single byte to INTERNAL. */
75 typedef wint_t (*__gconv_btowc_fct) (struct __gconv_step *, unsigned char);
77 /* Constructor and destructor for local data for conversion step. */
78 typedef int (*__gconv_init_fct) (struct __gconv_step *);
79 typedef void (*__gconv_end_fct) (struct __gconv_step *);
82 /* Type of a transliteration/transscription function. */
83 typedef int (*__gconv_trans_fct) (struct __gconv_step *,
84 struct __gconv_step_data *, void *,
85 __const unsigned char *,
86 __const unsigned char **,
87 __const unsigned char *, unsigned char **,
90 /* Function to call to provide transliteration module with context. */
91 typedef int (*__gconv_trans_context_fct) (void *, __const unsigned char *,
92 __const unsigned char *,
93 unsigned char *, unsigned char *);
95 /* Function to query module about supported encoded character sets. */
96 typedef int (*__gconv_trans_query_fct) (__const char *, __const char ***,
99 /* Constructor and destructor for local data for transliteration. */
100 typedef int (*__gconv_trans_init_fct) (void **, const char *);
101 typedef void (*__gconv_trans_end_fct) (void *);
103 struct __gconv_trans_data
105 /* Transliteration/Transscription function. */
106 __gconv_trans_fct __trans_fct;
107 __gconv_trans_context_fct __trans_context_fct;
108 __gconv_trans_end_fct __trans_end_fct;
110 struct __gconv_trans_data *__next;
114 /* Description of a conversion step. */
117 struct __gconv_loaded_object *__shlib_handle;
118 __const char *__modname;
126 __gconv_btowc_fct __btowc_fct;
127 __gconv_init_fct __init_fct;
128 __gconv_end_fct __end_fct;
130 /* Information about the number of bytes needed or produced in this
131 step. This helps optimizing the buffer sizes. */
132 int __min_needed_from;
133 int __max_needed_from;
137 /* Flag whether this is a stateful encoding or not. */
140 void *__data; /* Pointer to step-local data. */
143 /* Additional data for steps in use of conversion descriptor. This is
144 allocated by the `init' function. */
145 struct __gconv_step_data
147 unsigned char *__outbuf; /* Output buffer for this step. */
148 unsigned char *__outbufend; /* Address of first byte after the output
151 /* Is this the last module in the chain. */
154 /* Counter for number of invocations of the module function for this
156 int __invocation_counter;
158 /* Flag whether this is an internal use of the module (in the mb*towc*
159 and wc*tomb* functions) or regular with iconv(3). */
162 __mbstate_t *__statep;
163 __mbstate_t __state; /* This element must not be used directly by
164 any module; always use STATEP! */
166 /* Transliteration information. */
167 struct __gconv_trans_data *__trans;
171 /* Combine conversion step description with data. */
172 typedef struct __gconv_info
175 struct __gconv_step *__steps;
176 __extension__ struct __gconv_step_data __data __flexarr;