Add simple json validator application

Makefile.am

@@ -104,7 +104,8 @@ libutil_la_CXXFLAGS = $(AM_CXXFLAGS)
 libutil_la_LIBADD   = $(BOOST_SYSTEM_LIB)
 
 bin_PROGRAMS = 		\
-    json-clean
+    json-clean		\
+    json-validate
 
 json_clean_SOURCES    = json/clean.cpp
 json_clean_DEPENDENCIES = $(top_builddir)/.libs/libutil.la
@@ -112,3 +113,11 @@ json_clean_LDFLAGS    = 		\
     $(BOOST_LDFLAGS)  			\
     $(BOOST_FILESYSTEM_LIB) 		\
     $(top_builddir)/.libs/libutil.a
+
+
+json_validate_SOURCES = json/validate.cpp
+json_validate_DEPENDENCIES = $(top_builddir)/.libs/libutil.la
+json_validate_LDFLAGS    = 		\
+    $(BOOST_LDFLAGS)  			\
+    $(BOOST_FILESYSTEM_LIB) 		\
+    $(top_builddir)/.libs/libutil.a

json/validate.cpp

@@ -0,0 +1,33 @@
+#include "../json.hpp"
+
+#include <iostream>
+#include <cstdlib>
+#include <boost/filesystem.hpp>
+
+
+enum {
+    ARG_CMD,
+    ARG_PATH,
+
+    NUM_ARGS
+};
+
+
+int
+main (int argc, char ** argv) {
+    if (argc != NUM_ARGS) {
+        std::cerr << "Invalid arguments. "
+                  << argv[ARG_CMD] << " <path> "
+                  << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    try {
+       json::parse (boost::filesystem::path (argv[ARG_PATH]));
+    } catch (json::error &x) {
+        std::cerr << x.what () << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}