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
|
/* This file is part of GNU Dico.
Copyright (C) 2012-2024 Sergey Poznyakoff
GNU Dico is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Dico 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <dico.h>
#include <libi18n.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
enum crlf_state
{
state_init,
state_cr
};
struct _crlfstr {
dico_stream_t transport;
int noclose;
enum crlf_state state;
char cb;
};
static int
_crlfstr_write(void *data, const char *buf, size_t size, size_t *pret)
{
struct _crlfstr *s = data;
const char *p, *q;
for (p = buf, q = buf + size; p < q; p++) {
switch (*p) {
case '\n':
if (s->state == state_cr)
s->state = state_init;
else {
if (p > buf)
dico_stream_write(s->transport, buf, p - buf);
dico_stream_write(s->transport, "\r\n", 2);
buf = p + 1;
}
break;
case '\r':
s->state = state_cr;
break;
default:
s->state = state_init;
}
}
if (p > buf)
dico_stream_write(s->transport, buf, p - buf);
*pret = size;
return 0;
}
static int
_crlfstr_read(void *data, char *buf, size_t size, size_t *pret)
{
struct _crlfstr *s = data;
size_t sz = 0;
size_t total = 0;
char *p;
if (s->cb) {
buf[sz++] = s->cb;
s->cb = 0;
}
while (total < size) {
int i;
if (sz == 0) {
int rc = dico_stream_read(s->transport, buf + total, size - total,
&sz);
if (rc)
return rc;
if (sz == 0)
break;
}
p = buf + total;
for (i = 0; i < sz; i++, p++) {
switch (*p) {
case '\r':
if (s->cb)
buf[total++] = s->cb;
s->cb = '\r';
break;
case '\n':
s->cb = 0;
buf[total++] = *p;
break;
default:
if (s->cb) {
buf[total++] = s->cb;
s->cb = 0;
}
if (total == size)
s->cb = *p;
else
buf[total++] = *p;
}
}
sz = 0;
}
*pret = total;
return 0;
}
static int
_crlfstr_destroy(void *data)
{
struct _crlfstr *s = data;
if (!s->noclose)
dico_stream_destroy(&s->transport);
return 0;
}
static int
_crlfstr_flush(void *data)
{
struct _crlfstr *s = data;
return dico_stream_flush(s->transport);
}
static int
_crlfstr_close(void *data)
{
struct _crlfstr *s = data;
if (s->noclose)
return 0;
return dico_stream_close(s->transport);
}
static int
_crlfstr_ioctl(void *data, int code, void *call_data)
{
struct _crlfstr *s = data;
switch (code) {
case DICO_IOCTL_GET_TRANSPORT:
*(dico_stream_t*)call_data = s->transport;
break;
case DICO_IOCTL_SET_TRANSPORT:
s->transport = call_data;
break;
case DICO_IOCTL_BYTES_IN:
*(off_t*)call_data = dico_stream_bytes_in(s->transport);
break;
case DICO_IOCTL_BYTES_OUT:
*(off_t*)call_data = dico_stream_bytes_out(s->transport);
break;
default:
errno = EINVAL;
return -1;
}
return 0;
}
dico_stream_t
dico_crlf_stream(dico_stream_t transport, int flags, int noclose)
{
int rc;
struct _crlfstr *s;
dico_stream_t str;
s = malloc(sizeof(*s));
if (!s)
return NULL;
memset(s, 0, sizeof(*s));
rc = dico_stream_create(&str,
flags & (DICO_STREAM_READ|DICO_STREAM_WRITE), s);
if (rc) {
free(s);
return NULL;
}
s->transport = transport;
s->noclose = noclose;
dico_stream_set_write(str, _crlfstr_write);
dico_stream_set_read(str, _crlfstr_read);
dico_stream_set_flush(str, _crlfstr_flush);
dico_stream_set_close(str, _crlfstr_close);
dico_stream_set_destroy(str, _crlfstr_destroy);
dico_stream_set_ioctl(str, _crlfstr_ioctl);
dico_stream_set_buffer(str, dico_buffer_line, 1024);
return str;
}
|
