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
|
/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This 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.
*
* This 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 this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "glib.h"
#define MIN_ARRAY_SIZE 16
typedef struct _GRealArray GRealArray;
struct _GRealArray
{
guint8 *data;
guint len;
guint alloc;
guint zero_terminated;
};
static gint g_nearest_pow (gint num);
static void g_array_maybe_expand (GRealArray *array,
gint len);
static GMemChunk *array_mem_chunk = NULL;
GArray*
g_array_new (gint zero_terminated)
{
GRealArray *array;
if (!array_mem_chunk)
array_mem_chunk = g_mem_chunk_new ("array mem chunk",
sizeof (GRealArray),
1024, G_ALLOC_AND_FREE);
array = g_chunk_new (GRealArray, array_mem_chunk);
array->data = NULL;
array->len = 0;
array->alloc = 0;
array->zero_terminated = (zero_terminated ? 1 : 0);
return (GArray*) array;
}
void
g_array_free (GArray *array,
gint free_segment)
{
if (free_segment)
g_free (array->data);
g_mem_chunk_free (array_mem_chunk, array);
}
GArray*
g_rarray_append (GArray *array,
gpointer data,
gint size)
{
g_array_maybe_expand ((GRealArray*) array, size);
memcpy (array->data + array->len, data, size);
array->len += size;
return array;
}
GArray*
g_rarray_prepend (GArray *array,
gpointer data,
gint size)
{
g_array_maybe_expand ((GRealArray*) array, size);
g_memmove (array->data + size, array->data, array->len);
memcpy (array->data, data, size);
array->len += size;
return array;
}
GArray*
g_rarray_truncate (GArray *array,
gint length,
gint size)
{
if (array->data)
memset (array->data + length * size, 0, size);
array->len = length * size;
return array;
}
static gint
g_nearest_pow (gint num)
{
gint n = 1;
while (n < num)
n <<= 1;
return n;
}
static void
g_array_maybe_expand (GRealArray *array,
gint len)
{
guint old_alloc;
if ((array->len + len) > array->alloc)
{
old_alloc = array->alloc;
array->alloc = g_nearest_pow (array->len + array->zero_terminated + len);
array->alloc = MAX (array->alloc, MIN_ARRAY_SIZE);
array->data = g_realloc (array->data, array->alloc);
memset (array->data + old_alloc, 0, array->alloc - old_alloc);
}
}
|
