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, 110 insertions, 0 deletions

diff --git a/host/tests/CMakeLists.txt b/host/tests/CMakeLists.txt
index 0741191f2..b22f5722c 100644
--- a/host/tests/CMakeLists.txt
+++ b/host/tests/CMakeLists.txt
@@ -111,6 +111,19 @@ TARGET_LINK_LIBRARIES(nocscript_parser_test uhd ${Boost_LIBRARIES})
 UHD_ADD_TEST(nocscript_parser_test nocscript_parser_test)
 UHD_INSTALL(TARGETS nocscript_parser_test RUNTIME DESTINATION ${PKG_LIB_DIR}/tests COMPONENT tests)
 
+ADD_EXECUTABLE(config_parser_test
+    config_parser_test.cpp
+    ${CMAKE_SOURCE_DIR}/lib/utils/config_parser.cpp
+)
+TARGET_LINK_LIBRARIES(config_parser_test uhd ${Boost_LIBRARIES})
+UHD_ADD_TEST(config_parser_test config_parser_test)
+UHD_INSTALL(TARGETS
+    config_parser_test
+    RUNTIME
+    DESTINATION ${PKG_LIB_DIR}/tests
+    COMPONENT tests
+)
+
 ########################################################################
 # demo of a loadable module
 ########################################################################
diff --git a/host/tests/config_parser_test.cpp b/host/tests/config_parser_test.cpp
new file mode 100644
index 000000000..e0ad3e919
--- /dev/null
+++ b/host/tests/config_parser_test.cpp
@@ -0,0 +1,97 @@
+//
+// Copyright 2017 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0+
+//
+
+#include <uhdlib/utils/config_parser.hpp>
+#include <boost/test/unit_test.hpp>
+#include <boost/assign/list_of.hpp>
+#include <fstream>
+#include <cstdio>
+
+const std::string INI1_FILENAME = "test1.ini";
+const std::string INI1 =
+    "[section1]\n"
+    "key1=value1\n"
+    "key2=4\n"
+    "\n"
+    "; This is a comment\n"
+    "[section2]\n"
+    "key3=value with spaces\n"
+    "key4= leading and trailing spaces \n"
+;
+
+const std::string INI2_FILENAME = "test2.ini";
+const std::string INI2 =
+    "[section2]\n"
+    "key3=value with even more spaces\n"
+    "\n"
+    "[section3]\n"
+    "key4=\"with quotes\"\n";
+
+namespace {
+    //! Create files that can be read by the CUT
+    void make_config_parsers()
+    {
+        std::ofstream ini1(INI1_FILENAME);
+        ini1 << INI1 << std::endl;
+        ini1.close();
+        std::ofstream ini2(INI2_FILENAME);
+        ini2 << INI2 << std::endl;
+        ini2.close();
+    }
+
+    //! Tidy up after us
+    void cleanup_config_parsers()
+    {
+        std::remove(INI1_FILENAME.c_str());
+        std::remove(INI2_FILENAME.c_str());
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_config_parser){
+    make_config_parsers();
+    uhd::config_parser I(INI1_FILENAME);
+    BOOST_CHECK_EQUAL(I.sections().size(), 2);
+    BOOST_CHECK_EQUAL(I.options("section1").size(), 2);
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section1", "key1"),
+        "value1"
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<int>("section1", "key2"),
+        4
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section2", "key3"),
+        "value with spaces"
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section2", "key4"),
+        "leading and trailing spaces"
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section2", "non_existent_key", "default"),
+        "default"
+    );
+    BOOST_REQUIRE_THROW(
+        I.get<std::string>("section2", "non_existent_key"),
+        uhd::key_error
+    );
+    I.read_file(INI2_FILENAME);
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section2", "key3"),
+        "value with even more spaces"
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section1", "key1"),
+        "value1"
+    );
+    BOOST_CHECK_EQUAL(
+        I.get<std::string>("section3", "key4"),
+        "\"with quotes\""
+    );
+
+    cleanup_config_parsers();
+}