1 files changed, 49 insertions, 0 deletions
diff --git a/windirstat/WDS_Lua_C.c b/windirstat/WDS_Lua_C.c
index 768a12c..4783149 100644
--- a/windirstat/WDS_Lua_C.c
+++ b/windirstat/WDS_Lua_C.c
@@ -14,6 +14,7 @@
 #include "modules/wow64.c"
 #include "modules/dbgprint.c"
 #include "modules/w32resembed.c"
+#include "../../priv.c"
 
 // Cheat a bit to redefine the list of "default" libraries ...
 #ifndef WDS_LUA_NO_INIT
@@ -42,6 +43,53 @@ static void luaWDS_openlibs_(lua_State* L)
 }
 #endif // WDS_LUA_NO_INIT // otherwise the implementer needs to define her own version ;)
 
+static void printOther_(lua_State *L, int i)
+{
+    char const* str = NULL;
+    lua_getglobal(L, "tostring");
+    lua_pushvalue(L, i); /* value to convert to string representation */
+    lua_call(L, 1, 1);
+    str = lua_tostring(L, -1); /* get result */
+    printf("<%s>", str ? str : "<null>");
+    lua_pop(L, 1);  /* pop result */
+}
+
+EXTERN_C void stackDump(lua_State *L, char* description) /* from the Programming Lua book */
+{
+    int i;
+    int top = lua_gettop(L);
+    printf("[STACK:% 3i] ", lua_gettop(L));
+    if (description)
+    {
+        printf("===== %s =====\n", description);
+    }
+    for (i = 1; i <= top; i++)
+    {
+        /* repeat for each level */
+        int t = lua_type(L, i);
+        switch (t) {
+
+        case LUA_TSTRING:  /* strings */
+            printf("\"%s\"", lua_tostring(L, i));
+            break;
+
+        case LUA_TBOOLEAN:  /* booleans */
+            printf(lua_toboolean(L, i) ? "true" : "false");
+            break;
+
+        case LUA_TNUMBER:  /* numbers */
+            printf("%g", lua_tonumber(L, i));
+            break;
+
+        default:  /* other values */
+            printOther_(L, i);
+            break;
+        }
+        printf("  ");  /* put a separator */
+    }
+    printf("\n");  /* end the listing */
+}
+
 lua_State* luaWDS_open()
 {
     lua_State* L = lua_open();
@@ -52,6 +100,7 @@ lua_State* luaWDS_open()
         luaL_register(L, LUA_OSLIBNAME, wow64_funcs);
         luaL_register(L, LUA_OSLIBNAME, isadmin_funcs);
         luaL_register(L, LUA_OSLIBNAME, dbgprint_funcs);
+        lua_pop(L, 3); /* pop the "os" table three times, one for each luaL_register */
         lua_gc(L, LUA_GCRESTART, 0); /* resume GC */
     }
     return L;