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
|
/*
Ousía
Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
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 "FileLocator.hpp"
#include <fstream>
namespace ousia {
void FileLocator::addSearchPath(const boost::filesystem::path &path,
std::set<ResourceLocator::Type> types)
{
for (auto &type : types) {
// retrieve the path vector for the given type.
auto it = searchPaths.find(type);
if (it != searchPaths.end()) {
it->second.push_back(path);
} else {
std::vector<boost::filesystem::path> v{path};
searchPaths.insert({type, v});
}
}
}
ResourceLocator::Location FileLocator::locate(const std::string &path,
const std::string &relativeTo,
const Type type) const
{
boost::filesystem::path base(relativeTo);
if (boost::filesystem::exists(base)) {
// look if 'relativeTo' is a directory already.
if (!boost::filesystem::is_directory(base)) {
// if not we use the parent directory.
base = base.parent_path();
}
// use the / operator to append the path.
base /= path;
// if we already found a fitting resource there, use that.
if (boost::filesystem::exists(base)) {
std::string location =
boost::filesystem::canonical(base).generic_string();
return ResourceLocator::Location(true, *this, type, location);
}
}
// otherwise look in the search paths.
auto it = searchPaths.find(type);
if (it != searchPaths.end()) {
for (boost::filesystem::path p : it->second) {
p /= path;
if (boost::filesystem::exists(p)) {
std::string location =
boost::filesystem::canonical(p).generic_string();
return ResourceLocator::Location(true, *this, type, location);
}
}
}
// if we find the resource in none of the search paths we return a location.
// with the found flag set to false.
ResourceLocator::Location l(false, *this, type, "");
return l;
}
std::unique_ptr<std::istream> FileLocator::stream(
const std::string &location) const
{
std::unique_ptr<std::istream> ifs{new std::ifstream(location)};
return std::move(ifs);
}
}
|
