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
|
/*****************************************************************************
* buffer.c: MMS access plug-in
*****************************************************************************
* Copyright (C) 2001-2004 VLC authors and VideoLAN
* $Id: 4e11e36b05caf28f0776e44b7f6805e20bfc6f26 $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program 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.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_access.h>
#include <vlc_charset.h>
#include "asf.h"
#include "buffer.h"
/*****************************************************************************
* Buffer management functions
*****************************************************************************/
int var_buffer_initwrite( var_buffer_t *p_buf, int i_default_size )
{
p_buf->i_size = ( i_default_size > 0 ) ? i_default_size : 2048;
p_buf->i_data = 0;
p_buf->p_data = malloc( p_buf->i_size );
return p_buf->p_data ? 0 : -1;
}
int var_buffer_reinitwrite( var_buffer_t *p_buf, int i_default_size )
{
p_buf->i_data = 0;
if( p_buf->i_size < i_default_size )
{
p_buf->i_size = i_default_size;
free( p_buf->p_data );
p_buf->p_data = malloc( p_buf->i_size );
}
if( !p_buf->p_data )
{
p_buf->i_size = ( i_default_size > 0 ) ? i_default_size : 2048;
p_buf->p_data = malloc( p_buf->i_size );
}
return p_buf->p_data ? 0 : -1;
}
void var_buffer_add8 ( var_buffer_t *p_buf, uint8_t i_byte )
{
/* check if there is enough data */
if( p_buf->i_data >= p_buf->i_size )
{
p_buf->i_size += 1024;
p_buf->p_data = xrealloc( p_buf->p_data, p_buf->i_size );
}
p_buf->p_data[p_buf->i_data] = i_byte&0xff;
p_buf->i_data++;
}
void var_buffer_add16( var_buffer_t *p_buf, uint16_t i_word )
{
var_buffer_add8( p_buf, i_word&0xff );
var_buffer_add8( p_buf, ( i_word >> 8 )&0xff );
}
void var_buffer_add32( var_buffer_t *p_buf, uint32_t i_dword )
{
var_buffer_add16( p_buf, i_dword&0xffff );
var_buffer_add16( p_buf, ( i_dword >> 16 )&0xffff );
}
void var_buffer_add64( var_buffer_t *p_buf, uint64_t i_long )
{
var_buffer_add32( p_buf, i_long&0xffffffff );
var_buffer_add32( p_buf, ( i_long >> 32 )&0xffffffff );
}
void var_buffer_addmemory( var_buffer_t *p_buf, void *p_mem, int i_mem )
{
/* check if there is enough data */
if( p_buf->i_data + i_mem >= p_buf->i_size )
{
p_buf->i_size += i_mem + 1024;
p_buf->p_data = xrealloc( p_buf->p_data, p_buf->i_size );
}
memcpy( p_buf->p_data + p_buf->i_data, p_mem, i_mem );
p_buf->i_data += i_mem;
}
void var_buffer_addUTF16( access_t *p_access, var_buffer_t *p_buf, const char *p_str )
{
uint16_t *p_out;
size_t i_out;
if( p_str != NULL )
#ifdef WORDS_BIGENDIAN
p_out = ToCharset( "UTF-16BE", p_str, &i_out );
#else
p_out = ToCharset( "UTF-16LE", p_str, &i_out );
#endif
else
p_out = NULL;
if( p_out == NULL )
{
msg_Err( p_access, "UTF-16 conversion failed" );
i_out = 0;
}
i_out /= 2;
for( size_t i = 0; i < i_out; i ++ )
var_buffer_add16( p_buf, p_out[i] );
free( p_out );
var_buffer_add16( p_buf, 0 );
}
void var_buffer_free( var_buffer_t *p_buf )
{
free( p_buf->p_data );
p_buf->i_data = 0;
p_buf->i_size = 0;
}
void var_buffer_initread( var_buffer_t *p_buf, void *p_data, int i_data )
{
p_buf->i_size = i_data;
p_buf->i_data = 0;
p_buf->p_data = p_data;
}
uint8_t var_buffer_get8 ( var_buffer_t *p_buf )
{
uint8_t i_byte;
if( p_buf->i_data >= p_buf->i_size )
{
return( 0 );
}
i_byte = p_buf->p_data[p_buf->i_data];
p_buf->i_data++;
return( i_byte );
}
uint16_t var_buffer_get16( var_buffer_t *p_buf )
{
uint16_t i_b1, i_b2;
i_b1 = var_buffer_get8( p_buf );
i_b2 = var_buffer_get8( p_buf );
return( i_b1 + ( i_b2 << 8 ) );
}
uint32_t var_buffer_get32( var_buffer_t *p_buf )
{
uint32_t i_w1, i_w2;
i_w1 = var_buffer_get16( p_buf );
i_w2 = var_buffer_get16( p_buf );
return( i_w1 + ( i_w2 << 16 ) );
}
uint64_t var_buffer_get64( var_buffer_t *p_buf )
{
uint64_t i_dw1, i_dw2;
i_dw1 = var_buffer_get32( p_buf );
i_dw2 = var_buffer_get32( p_buf );
return( i_dw1 + ( i_dw2 << 32 ) );
}
int var_buffer_getmemory ( var_buffer_t *p_buf, void *p_mem, int64_t i_mem )
{
int i_copy;
i_copy = __MIN( i_mem, p_buf->i_size - p_buf->i_data );
if( i_copy > 0 && p_mem != NULL)
{
memcpy( p_mem, p_buf->p_data + p_buf->i_data , i_copy );
}
if( i_copy < 0 )
{
i_copy = 0;
}
p_buf->i_data += i_copy;
return( i_copy );
}
int var_buffer_readempty( var_buffer_t *p_buf )
{
return( ( p_buf->i_data >= p_buf->i_size ) ? 1 : 0 );
}
void var_buffer_getguid( var_buffer_t *p_buf, guid_t *p_guid )
{
int i;
p_guid->Data1 = var_buffer_get32( p_buf );
p_guid->Data2 = var_buffer_get16( p_buf );
p_guid->Data3 = var_buffer_get16( p_buf );
for( i = 0; i < 8; i++ )
{
p_guid->Data4[i] = var_buffer_get8( p_buf );
}
}
|
