CaptureFactory_unix.cpp
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00001 /*
00002  * This file is part of ALVAR, A Library for Virtual and Augmented Reality.
00003  *
00004  * Copyright 2007-2012 VTT Technical Research Centre of Finland
00005  *
00006  * Contact: VTT Augmented Reality Team <alvar.info@vtt.fi>
00007  *          <http://www.vtt.fi/multimedia/alvar.html>
00008  *
00009  * ALVAR is free software; you can redistribute it and/or modify it under the
00010  * terms of the GNU Lesser General Public License as published by the Free
00011  * Software Foundation; either version 2.1 of the License, or (at your option)
00012  * any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful, but WITHOUT
00015  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00016  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
00017  * for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public License
00020  * along with ALVAR; if not, see
00021  * <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html>.
00022  */
00023 
00024 #include "ar_track_alvar/CaptureFactory_private.h"
00025 
00026 #include <stdlib.h>
00027 #include <unistd.h> // for readlink()
00028 
00029 namespace alvar {
00030 
00031 void CaptureFactoryPrivate::setupPluginPaths()
00032 {
00033     // application path and default plugin path
00034     const int bufferSize = 4096;
00035     char applicationBuffer[bufferSize];
00036     int count = readlink("/proc/self/exe", applicationBuffer, bufferSize);
00037     if (count != 0 && count < bufferSize) {
00038         std::string applicationPath(applicationBuffer, count);
00039         applicationPath = std::string(applicationPath, 0, applicationPath.find_last_of("/"));
00040         mPluginPaths.push_back(applicationPath);
00041         mPluginPaths.push_back(applicationPath + "/alvarplugins");
00042     }
00043     
00044     // ALVAR library path
00045     parseEnvironmentVariable(std::string("ALVAR_LIBRARY_PATH"));
00046 
00047     // ALVAR plugin path
00048     parseEnvironmentVariable(std::string("ALVAR_PLUGIN_PATH"));
00049 }
00050 
00051 void CaptureFactoryPrivate::parseEnvironmentVariable(const std::string &variable)
00052 {
00053     // acquire environment variable
00054     char *buffer;
00055     std::string path("");
00056     buffer = getenv(variable.data());
00057     if (buffer) {
00058         path = std::string(buffer);
00059     }
00060     
00061     // tokenize paths
00062     char delimitor = ':';
00063     if (!path.empty()) {
00064         std::string::size_type start = 0;
00065         std::string::size_type end = 0;
00066         while ((end = path.find_first_of(delimitor, start)) != std::string::npos) {
00067             std::string tmp(path, start, end - start);
00068             if (!tmp.empty()) {
00069                 mPluginPaths.push_back(tmp);
00070             }
00071             start = end + 1;
00072         }
00073         if (start != path.size()) {
00074             std::string tmp(path, start, std::string::npos);
00075             if (!tmp.empty()) {
00076                 mPluginPaths.push_back(tmp);
00077             }
00078         }
00079     }
00080 }
00081 
00082 std::string CaptureFactoryPrivate::pluginPrefix()
00083 {
00084     return std::string("lib");
00085 }
00086 
00087 std::string CaptureFactoryPrivate::pluginExtension()
00088 {
00089     return std::string("so");
00090 }
00091 
00092 } // namespace alvar


ar_track_alvar
Author(s): Scott Niekum
autogenerated on Thu Feb 16 2017 03:23:02