Add groundFindField to groundvm.h

include/groundvm.h

@@ -208,6 +208,8 @@ GroundProgram groundParseFile(const char* code);
 GroundStruct groundCreateStruct();
 void groundAddFieldToStruct(GroundStruct* gstruct, char* name, GroundValue field);
 
+GroundObjectField* groundFindField(GroundObject head, const char *id);
+
 // Run function returned by Ground code
 // Use argc to set count of args, accepts that amount of GroundValue's after
 GroundValue groundRunFunction(GroundFunction* function, size_t argc, ...);

src/interface.c

@@ -180,3 +180,9 @@ GroundValue groundRunFunction(GroundFunction* function, size_t argc, ...) {
 
     return interpretGroundProgram(&function->program, &callScope);
 }
+
+GroundObjectField* groundFindField(GroundObject head, const char *id) {
+    GroundObjectField* s;
+    HASH_FIND_STR(head.fields, id, s);
+    return s;
+}