1 files changed, 21 insertions, 3 deletions
diff --git a/tools/jsonproc/jsonproc.cpp b/tools/jsonproc/jsonproc.cpp
index efe48f3..2ba5fd0 100644
--- a/tools/jsonproc/jsonproc.cpp
+++ b/tools/jsonproc/jsonproc.cpp
@@ -5,7 +5,7 @@
 #include <map>
 
 #include <string>
-using std::string;
+using std::string; using std::to_string;
 
 #include <inja.hpp>
 using namespace inja;
@@ -36,7 +36,14 @@ int main(int argc, char *argv[])
 
     // Add custom command callbacks.
     env.add_callback("doNotModifyHeader", 0, [jsonfilepath, templateFilepath](Arguments& args) {
-        return "//\n// DO NOT MODIFY THIS FILE! IT IS AUTO-GENERATED FROM " + jsonfilepath +" and Inja template " + templateFilepath + "\n//\n";
+        return "//\n// DO NOT MODIFY THIS FILE! It is auto-generated from " + jsonfilepath +" and Inja template " + templateFilepath + "\n//\n";
+    });
+
+    env.add_callback("subtract", 2, [](Arguments& args) {
+        int minuend = args.at(0)->get<int>();
+        int subtrahend = args.at(1)->get<int>();
+
+        return minuend - subtrahend;
     });
 
     env.add_callback("setVar", 2, [=](Arguments& args) {
@@ -46,6 +53,13 @@ int main(int argc, char *argv[])
         return "";
     });
 
+    env.add_callback("setVarInt", 2, [=](Arguments& args) {
+        string key = args.at(0)->get<string>();
+        string value = to_string(args.at(1)->get<int>());
+        set_custom_var(key, value);
+        return "";
+    });
+
     env.add_callback("getVar", 1, [=](Arguments& args) {
         string key = args.at(0)->get<string>();
         return get_custom_var(key);
@@ -67,7 +81,6 @@ int main(int argc, char *argv[])
         return rawValue.erase(0, prefix.length());
     });
 
-    // Add custom command callbacks.
     env.add_callback("removeSuffix", 2, [](Arguments& args) {
         string rawValue = args.at(0)->get<string>();
         string suffix = args.at(1)->get<string>();
@@ -78,6 +91,11 @@ int main(int argc, char *argv[])
         return rawValue.substr(0, i);
     });
 
+    // single argument is a json object
+    env.add_callback("isEmpty", 1, [](Arguments& args) {
+        return args.at(0)->empty();
+    });
+
     try
     {
         env.write_with_json_file(templateFilepath, jsonfilepath, outputFilepath);