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
|
//
// Copyright 2011 Ettus Research LLC
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
#include <uhd/property_tree.hpp>
#include <uhd/types/dict.hpp>
#include <boost/foreach.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/make_shared.hpp>
#include <iostream>
using namespace uhd;
/***********************************************************************
* Helper function to iterate through paths
**********************************************************************/
#include <boost/tokenizer.hpp>
#define path_tokenizer(path) \
boost::tokenizer<boost::char_separator<char> > \
(path, boost::char_separator<char>("/"))
/***********************************************************************
* Property path implementation wrapper
**********************************************************************/
fs_path::fs_path(void): std::string(){}
fs_path::fs_path(const char *p): std::string(p){}
fs_path::fs_path(const std::string &p): std::string(p){}
std::string fs_path::leaf(void) const{
const size_t pos = this->rfind("/");
if (pos == std::string::npos) return *this;
return this->substr(pos+1);
}
fs_path fs_path::branch_path(void) const{
const size_t pos = this->rfind("/");
if (pos == std::string::npos) return *this;
return fs_path(this->substr(0, pos));
}
fs_path uhd::operator/(const fs_path &lhs, const fs_path &rhs){
//strip trailing slash on left-hand-side
if (not lhs.empty() and *lhs.rbegin() == '/'){
return fs_path(lhs.substr(0, lhs.size()-1)) / rhs;
}
//strip leading slash on right-hand-side
if (not rhs.empty() and *rhs.begin() == '/'){
return lhs / fs_path(rhs.substr(1));
}
return fs_path(lhs + "/" + rhs);
}
fs_path uhd::operator/(const fs_path &lhs, size_t rhs)
{
fs_path rhs_str = boost::lexical_cast<std::string>(rhs);
return lhs / rhs_str;
}
/***********************************************************************
* Property tree implementation
**********************************************************************/
class property_tree_impl : public uhd::property_tree{
public:
property_tree_impl(const fs_path &root = fs_path()):
_root(root)
{
_guts = boost::make_shared<tree_guts_type>();
}
sptr subtree(const fs_path &path_) const{
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
property_tree_impl *subtree = new property_tree_impl(path);
subtree->_guts = this->_guts; //copy the guts sptr
return sptr(subtree);
}
void remove(const fs_path &path_){
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
node_type *parent = NULL;
node_type *node = &_guts->root;
BOOST_FOREACH(const std::string &name, path_tokenizer(path)){
if (not node->has_key(name)) throw_path_not_found(path);
parent = node;
node = &(*node)[name];
}
if (parent == NULL) throw uhd::runtime_error("Cannot uproot");
parent->pop(fs_path(path.leaf()));
}
bool exists(const fs_path &path_) const{
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
node_type *node = &_guts->root;
BOOST_FOREACH(const std::string &name, path_tokenizer(path)){
if (not node->has_key(name)) return false;
node = &(*node)[name];
}
return true;
}
std::vector<std::string> list(const fs_path &path_) const{
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
node_type *node = &_guts->root;
BOOST_FOREACH(const std::string &name, path_tokenizer(path)){
if (not node->has_key(name)) throw_path_not_found(path);
node = &(*node)[name];
}
return node->keys();
}
void _create(const fs_path &path_, const boost::shared_ptr<void> &prop){
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
node_type *node = &_guts->root;
BOOST_FOREACH(const std::string &name, path_tokenizer(path)){
if (not node->has_key(name)) (*node)[name] = node_type();
node = &(*node)[name];
}
if (node->prop.get() != NULL) throw uhd::runtime_error("Cannot create! Property already exists at: " + path);
node->prop = prop;
}
boost::shared_ptr<void> &_access(const fs_path &path_) const{
const fs_path path = _root / path_;
boost::mutex::scoped_lock lock(_guts->mutex);
node_type *node = &_guts->root;
BOOST_FOREACH(const std::string &name, path_tokenizer(path)){
if (not node->has_key(name)) throw_path_not_found(path);
node = &(*node)[name];
}
if (node->prop.get() == NULL) throw uhd::runtime_error("Cannot access! Property uninitialized at: " + path);
return node->prop;
}
private:
void throw_path_not_found(const fs_path &path) const{
throw uhd::lookup_error("Path not found in tree: " + path);
}
//basic structural node element
struct node_type : uhd::dict<std::string, node_type>{
boost::shared_ptr<void> prop;
};
//tree guts which may be referenced in a subtree
struct tree_guts_type{
node_type root;
boost::mutex mutex;
};
//members, the tree and root prefix
boost::shared_ptr<tree_guts_type> _guts;
const fs_path _root;
};
/***********************************************************************
* Property tree factory
**********************************************************************/
uhd::property_tree::sptr uhd::property_tree::make(void){
return sptr(new property_tree_impl());
}
|
