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
|
/* Copyright (C) 1999-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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/>.
As a special exception, if you link the code in this file with
files compiled with a GNU compiler to produce an executable,
that does not cause the resulting executable to be covered by
the GNU Lesser General Public License. This exception does not
however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
This exception applies to code released by its copyright holders
in files containing the exception. */
#include <libioP.h>
#include <dlfcn.h>
#include <wchar.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <langinfo.h>
#include <locale/localeinfo.h>
#include <wcsmbs/wcsmbsload.h>
#include <iconv/gconv_int.h>
#include <shlib-compat.h>
#include <pointer_guard.h>
/* Return orientation of stream. If mode is nonzero try to change
the orientation first. */
#undef _IO_fwide
int
_IO_fwide (FILE *fp, int mode)
{
/* Normalize the value. */
mode = mode < 0 ? -1 : (mode == 0 ? 0 : 1);
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
if (__glibc_unlikely (&_IO_stdin_used == NULL) && _IO_legacy_file (fp))
/* This is for a stream in the glibc 2.0 format. */
return -1;
#endif
/* The orientation already has been determined. */
if (fp->_mode != 0
/* Or the caller simply wants to know about the current orientation. */
|| mode == 0)
return fp->_mode;
/* Set the orientation appropriately. */
if (mode > 0)
{
struct _IO_codecvt *cc = fp->_codecvt = &fp->_wide_data->_codecvt;
fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base;
/* Get the character conversion functions based on the currently
selected locale for LC_CTYPE. */
{
/* Clear the state. We start all over again. */
memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t));
memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t));
struct gconv_fcts fcts;
__wcsmbs_clone_conv (&fcts);
assert (fcts.towc_nsteps == 1);
assert (fcts.tomb_nsteps == 1);
cc->__cd_in.step = fcts.towc;
cc->__cd_in.step_data.__invocation_counter = 0;
cc->__cd_in.step_data.__internal_use = 1;
cc->__cd_in.step_data.__flags = __GCONV_IS_LAST;
cc->__cd_in.step_data.__statep = &fp->_wide_data->_IO_state;
cc->__cd_out.step = fcts.tomb;
cc->__cd_out.step_data.__invocation_counter = 0;
cc->__cd_out.step_data.__internal_use = 1;
cc->__cd_out.step_data.__flags = __GCONV_IS_LAST | __GCONV_TRANSLIT;
cc->__cd_out.step_data.__statep = &fp->_wide_data->_IO_state;
}
/* From now on use the wide character callback functions. */
_IO_JUMPS_FILE_plus (fp) = fp->_wide_data->_wide_vtable;
}
/* Set the mode now. */
fp->_mode = mode;
return mode;
}
enum __codecvt_result
__libio_codecvt_out (struct _IO_codecvt *codecvt, __mbstate_t *statep,
const wchar_t *from_start, const wchar_t *from_end,
const wchar_t **from_stop, char *to_start, char *to_end,
char **to_stop)
{
enum __codecvt_result result;
struct __gconv_step *gs = codecvt->__cd_out.step;
int status;
size_t dummy;
const unsigned char *from_start_copy = (unsigned char *) from_start;
codecvt->__cd_out.step_data.__outbuf = (unsigned char *) to_start;
codecvt->__cd_out.step_data.__outbufend = (unsigned char *) to_end;
codecvt->__cd_out.step_data.__statep = statep;
__gconv_fct fct = gs->__fct;
if (gs->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
status = DL_CALL_FCT (fct,
(gs, &codecvt->__cd_out.step_data, &from_start_copy,
(const unsigned char *) from_end, NULL,
&dummy, 0, 0));
*from_stop = (wchar_t *) from_start_copy;
*to_stop = (char *) codecvt->__cd_out.step_data.__outbuf;
switch (status)
{
case __GCONV_OK:
case __GCONV_EMPTY_INPUT:
result = __codecvt_ok;
break;
case __GCONV_FULL_OUTPUT:
case __GCONV_INCOMPLETE_INPUT:
result = __codecvt_partial;
break;
default:
result = __codecvt_error;
break;
}
return result;
}
enum __codecvt_result
__libio_codecvt_in (struct _IO_codecvt *codecvt, __mbstate_t *statep,
const char *from_start, const char *from_end,
const char **from_stop,
wchar_t *to_start, wchar_t *to_end, wchar_t **to_stop)
{
enum __codecvt_result result;
struct __gconv_step *gs = codecvt->__cd_in.step;
int status;
size_t dummy;
const unsigned char *from_start_copy = (unsigned char *) from_start;
codecvt->__cd_in.step_data.__outbuf = (unsigned char *) to_start;
codecvt->__cd_in.step_data.__outbufend = (unsigned char *) to_end;
codecvt->__cd_in.step_data.__statep = statep;
__gconv_fct fct = gs->__fct;
if (gs->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
status = DL_CALL_FCT (fct,
(gs, &codecvt->__cd_in.step_data, &from_start_copy,
(const unsigned char *) from_end, NULL,
&dummy, 0, 0));
*from_stop = (const char *) from_start_copy;
*to_stop = (wchar_t *) codecvt->__cd_in.step_data.__outbuf;
switch (status)
{
case __GCONV_OK:
case __GCONV_EMPTY_INPUT:
result = __codecvt_ok;
break;
case __GCONV_FULL_OUTPUT:
case __GCONV_INCOMPLETE_INPUT:
result = __codecvt_partial;
break;
default:
result = __codecvt_error;
break;
}
return result;
}
int
__libio_codecvt_encoding (struct _IO_codecvt *codecvt)
{
/* See whether the encoding is stateful. */
if (codecvt->__cd_in.step->__stateful)
return -1;
/* Fortunately not. Now determine the input bytes for the conversion
necessary for each wide character. */
if (codecvt->__cd_in.step->__min_needed_from
!= codecvt->__cd_in.step->__max_needed_from)
/* Not a constant value. */
return 0;
return codecvt->__cd_in.step->__min_needed_from;
}
int
__libio_codecvt_length (struct _IO_codecvt *codecvt, __mbstate_t *statep,
const char *from_start, const char *from_end,
size_t max)
{
int result;
const unsigned char *cp = (const unsigned char *) from_start;
wchar_t to_buf[max];
struct __gconv_step *gs = codecvt->__cd_in.step;
size_t dummy;
codecvt->__cd_in.step_data.__outbuf = (unsigned char *) to_buf;
codecvt->__cd_in.step_data.__outbufend = (unsigned char *) &to_buf[max];
codecvt->__cd_in.step_data.__statep = statep;
__gconv_fct fct = gs->__fct;
if (gs->__shlib_handle != NULL)
PTR_DEMANGLE (fct);
DL_CALL_FCT (fct,
(gs, &codecvt->__cd_in.step_data, &cp,
(const unsigned char *) from_end, NULL,
&dummy, 0, 0));
result = cp - (const unsigned char *) from_start;
return result;
}
|
