1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _GCONV_INT_H
#define _GCONV_INT_H 1
#include "gconv.h"
#include <stdlib.h> /* For alloca used in macro below. */
#include <ctype.h> /* For __toupper_l used in macro below. */
#include <string.h> /* For strlen et al used in macro below. */
#include <libc-lock.h>
__BEGIN_DECLS
/* Structure for alias definition. Simply two strings. */
struct gconv_alias
{
char *fromname;
char *toname;
};
/* Structure describing one loaded shared object. This normally are
objects to perform conversation but as a special case the db shared
object is also handled. */
struct __gconv_loaded_object
{
/* Name of the object. It must be the first structure element. */
const char *name;
/* Reference counter for the db functionality. If no conversion is
needed we unload the db library. */
int counter;
/* The handle for the shared object. */
void *handle;
/* Pointer to the functions the module defines. */
__gconv_fct fct;
__gconv_init_fct init_fct;
__gconv_end_fct end_fct;
};
/* Description for an available conversion module. */
struct gconv_module
{
const char *from_string;
const char *to_string;
int cost_hi;
int cost_lo;
const char *module_name;
struct gconv_module *left; /* Prefix smaller. */
struct gconv_module *same; /* List of entries with identical prefix. */
struct gconv_module *right; /* Prefix larger. */
};
/* Flags for `gconv_open'. */
enum
{
GCONV_AVOID_NOCONV = 1 << 0
};
/* When GCONV_AVOID_NOCONV is set and no conversion is needed,
__GCONV_NULCONV should be returned. */
enum
{
__GCONV_NULCONV = -1
};
/* Global variables. */
/* Database of alias names. */
extern void *__gconv_alias_db attribute_hidden;
/* Array with available modules. */
extern struct gconv_module *__gconv_modules_db attribute_hidden;
/* Value of the GCONV_PATH environment variable. */
extern const char *__gconv_path_envvar attribute_hidden;
/* Lock for the conversion database content. */
__libc_lock_define (extern, __gconv_lock attribute_hidden)
/* The gconv functions expects the name to be in upper case and complete,
including the trailing slashes if necessary. */
#define norm_add_slashes(str,suffix) \
({ \
const char *cp = (str); \
char *result; \
char *tmp; \
size_t cnt = 0; \
const size_t suffix_len = strlen (suffix); \
\
while (*cp != '\0') \
if (*cp++ == '/') \
++cnt; \
\
tmp = result = __alloca (cp - (str) + 3 + suffix_len); \
cp = (str); \
while (*cp != '\0') \
*tmp++ = __toupper_l (*cp++, _nl_C_locobj_ptr); \
if (cnt < 2) \
{ \
*tmp++ = '/'; \
if (cnt < 1) \
{ \
*tmp++ = '/'; \
if (suffix_len != 0) \
tmp = __mempcpy (tmp, suffix, suffix_len); \
} \
} \
*tmp = '\0'; \
result; \
})
/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET. */
extern int __gconv_open (const char *toset, const char *fromset,
__gconv_t *handle, int flags)
attribute_hidden;
/* Free resources associated with transformation descriptor CD. */
extern int __gconv_close (__gconv_t cd)
attribute_hidden;
/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
according to rules described by CD and place up to *OUTBYTESLEFT
bytes in buffer starting at *OUTBUF. Return number of non-identical
conversions in *IRREVERSIBLE if this pointer is not null. */
extern int __gconv (__gconv_t cd, const unsigned char **inbuf,
const unsigned char *inbufend, unsigned char **outbuf,
unsigned char *outbufend, size_t *irreversible)
attribute_hidden;
/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
the single steps necessary for transformation from FROMSET to TOSET. */
extern int __gconv_find_transform (const char *toset, const char *fromset,
struct __gconv_step **handle,
size_t *nsteps, int flags)
attribute_hidden;
/* Search for transformation in cache data. */
extern int __gconv_lookup_cache (const char *toset, const char *fromset,
struct __gconv_step **handle, size_t *nsteps,
int flags)
attribute_hidden;
/* Compare the two name for whether they are after alias expansion the
same. This function uses the cache and fails if none is
loaded. */
extern int __gconv_compare_alias_cache (const char *name1, const char *name2,
int *result)
attribute_hidden;
/* Free data associated with a step's structure. */
extern void __gconv_release_step (struct __gconv_step *step)
attribute_hidden;
/* Read all the configuration data and cache it if not done so already. */
extern void __gconv_load_conf (void) attribute_hidden;
/* Try to read module cache file. */
extern int __gconv_load_cache (void) attribute_hidden;
/* Retrieve pointer to internal cache. */
extern void *__gconv_get_cache (void);
/* Retrieve pointer to internal module database. */
extern struct gconv_module *__gconv_get_modules_db (void);
/* Retrieve pointer to internal alias database. */
extern void *__gconv_get_alias_db (void);
/* Comparison function to search alias. */
extern int __gconv_alias_compare (const void *p1, const void *p2)
attribute_hidden;
/* Clear reference to transformation step implementations which might
cause the code to be unloaded. */
extern int __gconv_close_transform (struct __gconv_step *steps,
size_t nsteps)
attribute_hidden;
/* Free all resources allocated for the transformation record when
using the cache. */
extern void __gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
attribute_hidden;
/* Load shared object named by NAME. If already loaded increment reference
count. */
extern struct __gconv_loaded_object *__gconv_find_shlib (const char *name)
attribute_hidden;
/* Release shared object. If no further reference is available unload
the object. */
extern void __gconv_release_shlib (struct __gconv_loaded_object *handle)
attribute_hidden;
/* Fill STEP with information about builtin module with NAME. */
extern void __gconv_get_builtin_trans (const char *name,
struct __gconv_step *step)
attribute_hidden;
/* Transliteration using the locale's data. */
extern int __gconv_transliterate (struct __gconv_step *step,
struct __gconv_step_data *step_data,
const unsigned char *inbufstart,
const unsigned char **inbufp,
const unsigned char *inbufend,
unsigned char **outbufstart,
size_t *irreversible);
libc_hidden_proto (__gconv_transliterate)
/* If NAME is an codeset alias expand it. */
extern int __gconv_compare_alias (const char *name1, const char *name2)
attribute_hidden;
/* Builtin transformations. */
#ifdef _LIBC
# define __BUILTIN_TRANSFORM(Name) \
extern int Name (struct __gconv_step *step, \
struct __gconv_step_data *data, \
const unsigned char **inbuf, \
const unsigned char *inbufend, \
unsigned char **outbufstart, size_t *irreversible, \
int do_flush, int consume_incomplete)
__BUILTIN_TRANSFORM (__gconv_transform_ascii_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_ascii);
__BUILTIN_TRANSFORM (__gconv_transform_utf8_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_utf8);
__BUILTIN_TRANSFORM (__gconv_transform_ucs2_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_ucs2);
__BUILTIN_TRANSFORM (__gconv_transform_ucs2reverse_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_ucs2reverse);
__BUILTIN_TRANSFORM (__gconv_transform_internal_ucs4);
__BUILTIN_TRANSFORM (__gconv_transform_ucs4_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_ucs4le);
__BUILTIN_TRANSFORM (__gconv_transform_ucs4le_internal);
__BUILTIN_TRANSFORM (__gconv_transform_internal_utf16);
__BUILTIN_TRANSFORM (__gconv_transform_utf16_internal);
# undef __BUITLIN_TRANSFORM
/* Specialized conversion function for a single byte to INTERNAL, recognizing
only ASCII characters. */
extern wint_t __gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c);
#endif
__END_DECLS
#endif /* gconv_int.h */
|
