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
|
/* Simple transformations functions.
Copyright (C) 1997 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <gconv.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <sys/param.h>
int
__gconv_transform_dummy (struct gconv_step *step, struct gconv_step_data *data,
const char *inbuf, size_t *inlen, size_t *written,
int do_flush)
{
size_t do_write;
/* We have no stateful encoding. So we don't have to do anything
special. */
if (do_flush)
do_write = 0;
else
{
do_write = MIN (*inlen, data->outbufsize - data->outbufavail);
memcpy (data->outbuf, inbuf, do_write);
*inlen -= do_write;
data->outbufavail += do_write;
}
/* ### TODO Actually, this number must be devided according to the
size of the input charset. I.e., if the input is in UCS4 the
number of copied bytes must be divided by 4. */
if (written != NULL)
*written = do_write;
return GCONV_OK;
}
int
__gconv_transform_init_rstate (struct gconv_step *step,
struct gconv_step_data *data)
{
/* We have to provide the transformation function an correctly initialized
object of type `mbstate_t'. This must be dynamically allocated. */
data->data = calloc (1, sizeof (mbstate_t));
return data->data == NULL ? GCONV_NOMEM : GCONV_OK;
}
void
__gconv_transform_end_rstate (struct gconv_step_data *data)
{
if (data->data != NULL)
free (data->data);
}
int
__gconv_transform_ucs4_utf8 (struct gconv_step *step,
struct gconv_step_data *data, const char *inbuf,
size_t *inlen, size_t *written, int do_flush)
{
struct gconv_step *next_step = step + 1;
struct gconv_step_data *next_data = data + 1;
gconv_fct fct = next_step->fct;
size_t do_write;
int result;
/* If the function is called with no input this means we have to reset
to the initial state. The possibly partly converted input is
dropped. */
if (do_flush)
{
/* Clear the state. */
memset (data->data, '\0', sizeof (mbstate_t));
do_write = 0;
/* Call the steps down the chain if there are any. */
if (data->is_last)
result = GCONV_OK;
else
{
struct gconv_step *next_step = step + 1;
struct gconv_step_data *next_data = data + 1;
result = (*fct) (next_step, next_data, NULL, 0, written, 1);
/* Clear output buffer. */
data->outbufavail = 0;
}
}
else
{
do_write = 0;
do
{
const char *newinbuf = inbuf;
size_t actually = __wmemrtombs (&data->outbuf[data->outbufavail],
(const wchar_t **) &newinbuf,
*inlen / sizeof (wchar_t),
data->outbufsize - data->outbufavail,
(mbstate_t *) data->data);
/* Remember how much we converted. */
do_write += newinbuf - inbuf;
*inlen -= (newinbuf - inbuf) * sizeof (wchar_t);
data->outbufavail += actually;
if (data->is_last)
{
/* This is the last step. */
result = (*inlen < sizeof (wchar_t)
? GCONV_EMPTY_INPUT : GCONV_FULL_OUTPUT);
break;
}
/* Status so far. */
result = GCONV_EMPTY_INPUT;
if (data->outbufavail > 0)
{
/* Call the functions below in the chain. */
size_t newavail = data->outbufavail;
result = (*fct) (next_step, next_data, data->outbuf, &newavail,
written, 0);
/* Correct the output buffer. */
if (newavail != data->outbufavail && newavail > 0)
{
memmove (data->outbuf,
&data->outbuf[data->outbufavail - newavail],
newavail);
data->outbufavail = newavail;
}
}
}
while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
}
if (written != NULL && data->is_last)
*written = do_write / sizeof (wchar_t);
return result;
}
int
__gconv_transform_utf8_ucs4 (struct gconv_step *step,
struct gconv_step_data *data, const char *inbuf,
size_t *inlen, size_t *written, int do_flush)
{
struct gconv_step *next_step = step + 1;
struct gconv_step_data *next_data = data + 1;
gconv_fct fct = next_step->fct;
size_t do_write;
int result;
/* If the function is called with no input this means we have to reset
to the initial state. The possibly partly converted input is
dropped. */
if (do_flush)
{
/* Clear the state. */
memset (data->data, '\0', sizeof (mbstate_t));
do_write = 0;
/* Call the steps down the chain if there are any. */
if (data->is_last)
result = GCONV_OK;
else
{
struct gconv_step *next_step = step + 1;
struct gconv_step_data *next_data = data + 1;
result = (*fct) (next_step, next_data, NULL, 0, written, 1);
}
}
else
{
do_write = 0;
do
{
const char *newinbuf = inbuf;
size_t actually = __wmemrtowcs ((wchar_t *) &data->outbuf[data->outbufavail],
&newinbuf, *inlen,
((data->outbufsize
- data->outbufavail)
/ sizeof (wchar_t)),
(mbstate_t *) data->data);
/* Remember how much we converted. */
do_write += actually;
*inlen -= newinbuf - inbuf;
data->outbufavail += actually * sizeof (wchar_t);
if (data->is_last)
{
/* This is the last step. */
result = (data->outbufavail + sizeof (wchar_t) > data->outbufsize
? GCONV_FULL_OUTPUT : GCONV_EMPTY_INPUT);
break;
}
/* Status so far. */
result = GCONV_EMPTY_INPUT;
if (data->outbufavail > 0)
{
/* Call the functions below in the chain. */
size_t newavail = data->outbufavail;
result = (*fct) (next_step, next_data, data->outbuf, &newavail,
written, 0);
/* Correct the output buffer. */
if (newavail != data->outbufavail && newavail > 0)
{
memmove (data->outbuf,
&data->outbuf[data->outbufavail - newavail],
newavail);
data->outbufavail = newavail;
}
}
}
while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
}
if (written != NULL && data->is_last)
*written = do_write;
return result;
}
|
