1 files changed, 81 insertions, 0 deletions
diff --git a/host/lib/utils/paths.cpp b/host/lib/utils/paths.cpp
new file mode 100644
index 000000000..a3dd377e5
--- /dev/null
+++ b/host/lib/utils/paths.cpp
@@ -0,0 +1,81 @@
+//
+// Copyright 2010-2011 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/config.hpp>
+#include <boost/tokenizer.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/foreach.hpp>
+#include <boost/bind.hpp>
+#include <cstdlib>
+#include <string>
+#include <vector>
+
+namespace fs = boost::filesystem;
+
+/***********************************************************************
+ * Determine the paths separator
+ **********************************************************************/
+#ifdef UHD_PLATFORM_WIN32
+    static const std::string env_path_sep = ";";
+#else
+    static const std::string env_path_sep = ":";
+#endif /*UHD_PLATFORM_WIN32*/
+
+#define path_tokenizer(inp) \
+    boost::tokenizer<boost::char_separator<char> > \
+    (inp, boost::char_separator<char>(env_path_sep.c_str()))
+
+/***********************************************************************
+ * Get a list of paths for an environment variable
+ **********************************************************************/
+static std::string get_env_var(const std::string &var_name, const std::string &def_val = ""){
+    const char *var_value_ptr = std::getenv(var_name.c_str());
+    return (var_value_ptr == NULL)? def_val : var_value_ptr;
+}
+
+static std::vector<fs::path> get_env_paths(const std::string &var_name){
+
+    std::string var_value = get_env_var(var_name);
+
+    //convert to filesystem path, filter blank paths
+    std::vector<fs::path> paths;
+    if (var_value.empty()) return paths; //FIXME boost tokenizer throws w/ blank strings on some platforms
+    BOOST_FOREACH(const std::string &path_string, path_tokenizer(var_value)){
+        if (path_string.empty()) continue;
+        paths.push_back(fs::system_complete(path_string));
+    }
+    return paths;
+}
+
+/***********************************************************************
+ * Get a list of special purpose paths
+ **********************************************************************/
+static fs::path get_uhd_pkg_data_path(void){
+    return fs::path(get_env_var("UHD_PKG_DATA_PATH", UHD_PKG_DATA_PATH));
+}
+
+std::vector<fs::path> get_image_paths(void){
+    std::vector<fs::path> paths = get_env_paths("UHD_IMAGE_PATH");
+    paths.push_back(get_uhd_pkg_data_path() / "images");
+    return paths;
+}
+
+std::vector<fs::path> get_module_paths(void){
+    std::vector<fs::path> paths = get_env_paths("UHD_MODULE_PATH");
+    paths.push_back(get_uhd_pkg_data_path() / "modules");
+    return paths;
+}