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
|
/**
* @file llcategory.cpp
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llcategory.h"
#include "message.h"
const LLCategory LLCategory::none;
///----------------------------------------------------------------------------
/// Local function declarations, constants, enums, and typedefs
///----------------------------------------------------------------------------
// This is the storage of the category names. It's loosely based on a
// heap-like structure with indices into it for faster searching and
// so that we don't have to maintain a balanced heap. It's *VITALLY*
// important that the CATEGORY_INDEX and CATEGORY_NAME tables are kept
// in synch.
// CATEGORY_INDEX indexes into CATEGORY_NAME at the first occurance of
// a child. Thus, the first child of root is "Object" which is located
// in CATEGORY_NAME[1].
const S32 CATEGORY_INDEX[] =
{
1, // ROOT
6, // object
7, // clothing
7, // texture
7, // sound
7, // landmark
7, // object|component
7, // off the end (required for child count calculations)
};
// The heap of names
const char* CATEGORY_NAME[] =
{
"(none)",
"Object", // (none)
"Clothing",
"Texture",
"Sound",
"Landmark",
"Component", // object
NULL
};
///----------------------------------------------------------------------------
/// Class llcategory
///----------------------------------------------------------------------------
LLCategory::LLCategory()
{
// this is used as a simple compile time assertion. If this code
// fails to compile, the depth has been changed, and we need to
// clean up some of the code that relies on the depth, such as the
// default constructor. If CATEGORY_DEPTH != 4, this code will
// attempt to construct a zero length array - which the compiler
// should balk at.
// static const char CATEGORY_DEPTH_CHECK[(CATEGORY_DEPTH == 4)?1:0] = {' '}; // unused
// actually initialize the object.
mData[0] = 0;
mData[1] = 0;
mData[2] = 0;
mData[3] = 0;
}
void LLCategory::init(U32 value)
{
U8 v;
for(S32 i = 0; i < CATEGORY_DEPTH; i++)
{
v = (U8)((0x000000ff) & value);
mData[CATEGORY_DEPTH - 1 - i] = v;
value >>= 8;
}
}
U32 LLCategory::getU32() const
{
U32 rv = 0;
rv |= mData[0];
rv <<= 8;
rv |= mData[1];
rv <<= 8;
rv |= mData[2];
rv <<= 8;
rv |= mData[3];
return rv;
}
S32 LLCategory::getSubCategoryCount() const
{
S32 rv = CATEGORY_INDEX[mData[0] + 1] - CATEGORY_INDEX[mData[0]];
return rv;
}
// This method will return a category that is the nth subcategory. If
// you're already at the bottom of the hierarchy, then the method will
// return a copy of this.
LLCategory LLCategory::getSubCategory(U8 n) const
{
LLCategory rv(*this);
for(S32 i = 0; i < (CATEGORY_DEPTH - 1); i++)
{
if(rv.mData[i] == 0)
{
rv.mData[i] = n + 1;
break;
}
}
return rv;
}
// This method will return the name of the leaf category type
const char* LLCategory::lookupName() const
{
S32 i = 0;
S32 index = mData[i++];
while((i < CATEGORY_DEPTH) && (mData[i] != 0))
{
index = CATEGORY_INDEX[index];
++i;
}
return CATEGORY_NAME[index];
}
// message serialization
void LLCategory::packMessage(LLMessageSystem* msg) const
{
U32 data = getU32();
msg->addU32Fast(_PREHASH_Category, data);
}
// message serialization
void LLCategory::unpackMessage(LLMessageSystem* msg, const char* block)
{
U32 data;
msg->getU32Fast(block, _PREHASH_Category, data);
init(data);
}
// message serialization
void LLCategory::unpackMultiMessage(LLMessageSystem* msg, const char* block,
S32 block_num)
{
U32 data;
msg->getU32Fast(block, _PREHASH_Category, data, block_num);
init(data);
}
///----------------------------------------------------------------------------
/// Local function definitions
///----------------------------------------------------------------------------
|
