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
|
/*
* $Id: buffer.c,v 1.4 2002/01/06 23:03:58 binnema Exp $
*/
/*
** Copyright (C) 2001 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** 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 "buffer.h"
Buffer*
buffer_new ()
{
Buffer *new_buffer;
new_buffer = (Buffer*) malloc (sizeof(Buffer));
if (!new_buffer)
return NULL;
new_buffer->_data = NULL;
new_buffer->_len = 0;
return new_buffer;
}
Buffer*
buffer_destroy (Buffer *buffer)
{
assert (buffer);
free (buffer->_data);
free (buffer);
return NULL;
}
void
buffer_set_data (Buffer* buffer, const char* data, size_t len)
{
assert (buffer);
assert (data || len == 0);
buffer->_data = (char*) realloc (buffer->_data, len);
if (!buffer->_data)
return;
buffer->_data = memcpy (buffer->_data, data, len);
buffer->_len = len;
}
void
buffer_manage_data (Buffer* buffer, char* data, size_t len)
{
assert (buffer);
assert (data || len == 0);
buffer->_data = data;
buffer->_len = len;
}
char
buffer_at (const Buffer* buffer, BufferIterator pos)
{
assert (buffer);
assert (pos < buffer_end(buffer));
return buffer->_data[pos];
}
const char*
buffer_data (const Buffer* buffer)
{
assert (buffer);
return buffer->_data;
}
size_t
buffer_length (const Buffer *buffer)
{
assert (buffer);
return buffer->_len;
}
void
buffer_append (Buffer* buffer, const char* data, size_t len)
{
assert (buffer);
assert (data || len == 0);
buffer->_data = (char*)realloc (buffer->_data, buffer->_len + len);
memcpy (buffer->_data + buffer->_len, data, len);
buffer->_len += len;
}
void
buffer_prepend (Buffer *buffer, const char *data, size_t len)
{
assert (buffer);
assert (data || len == 0);
buffer_insert (buffer, data, len, 0);
}
void
buffer_insert (Buffer *buffer, const char *data, size_t len, size_t pos)
{
assert (buffer);
assert (data || len == 0);
assert (buffer->_len > pos);
buffer->_data = (char*)realloc (buffer->_data, buffer->_len + len);
memmove (buffer->_data + pos + len,
buffer->_data + pos,
buffer->_len - pos);
memmove (buffer->_data + pos, data, len);
buffer->_len += len;
}
void
buffer_erase (Buffer *buffer, size_t pos, size_t len)
{
assert (buffer);
assert (buffer->_len >= pos + len);
if (buffer->_len >= pos + len)
memcpy (buffer->_data + pos,
buffer->_data + pos + len,
buffer->_len - pos - len);
buffer->_data = realloc (buffer->_data, buffer->_len - len);
buffer->_len -= len;
}
BufferIterator
buffer_find (const Buffer *buffer, const char* pattern, size_t pattern_len)
/* brute force --> todo: kmp search */
{
int i, j, match;
assert (buffer);
assert (pattern || pattern_len == 0);
for (i = 0; i <= buffer->_len; ++i) {
for (j = 0; j < pattern_len; ++j) {
match = (buffer->_data[i+j] == pattern[j]);
if (!match)
break;
}
if (match && (j == pattern_len))
break;
}
return i;
}
void
buffer_clear (Buffer *buffer)
{
assert (buffer);
free (buffer->_data);
buffer->_data = NULL;
buffer->_len = 0;
}
|
