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
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-ofmemet: 8 -*- */
/* camel-stream-mem.c : memory buffer based stream */
/* inspired by gnome-stream-mem.c in bonobo by Miguel de Icaza */
/*
*
* Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> .
*
* This program 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 2 of the
* License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <config.h>
#include "camel-stream-mem.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "camel-log.h"
static CamelStreamClass *parent_class=NULL;
/* Returns the class for a CamelStreamMEM */
#define CS_CLASS(so) CAMEL_STREAM_MEM_CLASS (GTK_OBJECT(so)->klass)
static gint _read (CamelStream *stream, gchar *buffer, gint n);
static gint _write (CamelStream *stream, const gchar *buffer, gint n);
static void _flush (CamelStream *stream);
static gint _available (CamelStream *stream);
static gboolean _eos (CamelStream *stream);
static void _close (CamelStream *stream);
static gint _seek (CamelStream *stream, gint offset, CamelStreamSeekPolicy policy);
static void
camel_stream_mem_class_init (CamelStreamMemClass *camel_stream_mem_class)
{
CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_stream_mem_class);
parent_class = gtk_type_class (gtk_object_get_type ());
/* virtual method definition */
/* virtual method overload */
camel_stream_class->read = _read;
camel_stream_class->write = _write;
camel_stream_class->flush = _flush;
camel_stream_class->available = _available;
camel_stream_class->eos = _eos;
camel_stream_class->close = _close;
camel_stream_class->seek = _seek;
}
static void
camel_stream_mem_init (gpointer object, gpointer klass)
{
CamelStreamMem *camel_stream_mem = CAMEL_STREAM_MEM (object);
camel_stream_mem->buffer = g_byte_array_new ();
camel_stream_mem->position = 0;
}
GtkType
camel_stream_mem_get_type (void)
{
static GtkType camel_stream_mem_type = 0;
if (!camel_stream_mem_type) {
GtkTypeInfo camel_stream_mem_info =
{
"CamelStreamMem",
sizeof (CamelStreamMem),
sizeof (CamelStreamMemClass),
(GtkClassInitFunc) camel_stream_mem_class_init,
(GtkObjectInitFunc) camel_stream_mem_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
camel_stream_mem_type = gtk_type_unique (camel_stream_get_type (), &camel_stream_mem_info);
}
return camel_stream_mem_type;
}
/**
* _read: read bytes from a stream
* @stream: stream
* @buffer: buffer where bytes are stored
* @n: max number of bytes to read
*
*
*
* Return value: number of bytes actually read.
**/
static gint
_read (CamelStream *stream, gchar *buffer, gint n)
{
CamelStreamMem *camel_stream_mem = CAMEL_STREAM_MEM (stream);
gint nb_bytes_to_read;
g_assert (stream);
nb_bytes_to_read = MIN (n, (camel_stream_mem->buffer)->len - camel_stream_mem->position);
if (nb_bytes_to_read) {
memcpy (buffer, (camel_stream_mem->buffer)->data + camel_stream_mem->position, nb_bytes_to_read);
camel_stream_mem->position += nb_bytes_to_read;
}
return nb_bytes_to_read;
}
/**
* _write: read bytes to a stream
* @stream: the stream
* @buffer: byte buffer
* @n: number of bytes to write
*
*
*
* Return value: the number of bytes actually written
* in the stream.
**/
static gint
_write (CamelStream *stream, const gchar *buffer, gint n)
{
CamelStreamMem *camel_stream_mem = CAMEL_STREAM_MEM (stream);
g_assert (stream);
camel_stream_mem->buffer = g_byte_array_append (camel_stream_mem->buffer, (const guint8 *)buffer, n);
camel_stream_mem->position += n;
}
/**
* _flush: flush pending changes
* @stream: the stream
*
*
**/
static void
_flush (CamelStream *stream)
{
g_warning ("Not implemented yet");
}
/**
* _available: return the number of bytes available for reading
* @stream: the stream
*
* Return the number of bytes available without blocking.
*
* Return value: the number of bytes available
**/
static gint
_available (CamelStream *stream)
{
g_warning ("Not implemented yet");
}
/**
* _eos: test if there are bytes left to read
* @stream: the stream
*
*
*
* Return value: true if all stream has been read
**/
static gboolean
_eos (CamelStream *stream)
{
g_warning ("Not implemented yet");
}
/**
* _close: close a stream
* @stream: the stream
*
*
**/
static void
_close (CamelStream *stream)
{
g_warning ("Not implemented yet");
}
static gint
_seek (CamelStream *stream, gint offset, CamelStreamSeekPolicy policy)
{
gint position;
CamelStreamMem *camel_stream_mem = CAMEL_STREAM_MEM (stream);
switch (policy) {
case CAMEL_STREAM_SET:
position = offset;
break;
case CAMEL_STREAM_CUR:
position = camel_stream_mem->position + offset;
break;
case CAMEL_STREAM_END:
position = (camel_stream_mem->buffer)->len + offset;
break;
default:
return -1;
}
position = MIN (position, (camel_stream_mem->buffer)->len);
position = MAX (position, 0);
camel_stream_mem->position = position;
return position;
}
|
