lib: Add config_parser class

This class is not publicly exported. It is meant to read config files in
the INI format.

Reviewed-by: Brent Stapleton <brent.stapleton@ettus.com>

2 files changed, 60 insertions, 0 deletions

diff --git a/host/lib/utils/CMakeLists.txt b/host/lib/utils/CMakeLists.txt
index 91a579853..afaf99274 100644
--- a/host/lib/utils/CMakeLists.txt
+++ b/host/lib/utils/CMakeLists.txt
@@ -159,6 +159,7 @@ SET_SOURCE_FILES_PROPERTIES(
 ########################################################################
 LIBUHD_APPEND_SOURCES(
     ${CMAKE_CURRENT_SOURCE_DIR}/csv.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/config_parser.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/eeprom_utils.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/gain_group.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/ihex.cpp
diff --git a/host/lib/utils/config_parser.cpp b/host/lib/utils/config_parser.cpp
new file mode 100644
index 000000000..a88a99a01
--- /dev/null
+++ b/host/lib/utils/config_parser.cpp
@@ -0,0 +1,59 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0+
+//
+
+#include <uhdlib/utils/config_parser.hpp>
+#include <boost/format.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/property_tree/ini_parser.hpp>
+
+using namespace uhd;
+
+config_parser::config_parser(const std::string &path)
+{
+    if (not path.empty() and boost::filesystem::exists(path)) {
+        try {
+            boost::property_tree::ini_parser::read_ini(path, _pt);
+        } catch (const boost::property_tree::ini_parser_error &) {
+            throw uhd::runtime_error(str(
+                boost::format("Unable to parse file %s")
+                % path
+            ));
+        }
+    }
+}
+
+void config_parser::read_file(const std::string &path)
+{
+    config_parser new_config(path);
+    for (const auto& section : new_config.sections()) {
+        for (const auto& key : new_config.options(section)) {
+            set<std::string>(
+                    section,
+                    key,
+                    new_config.get<std::string>(section, key)
+            );
+        }
+    }
+}
+
+std::vector<std::string> config_parser::sections()
+{
+    try {
+        return _options(_pt);
+    } catch (const boost::property_tree::ptree_bad_path &) {
+        return std::vector<std::string>{};
+    }
+}
+
+std::vector<std::string> config_parser::options(const std::string &section)
+{
+    try {
+        return _options(_pt.get_child(section));
+    } catch (const boost::property_tree::ptree_bad_path &) {
+        return std::vector<std::string>{};
+    }
+}
+