From 0023710209c03205ae6fa15df59814e5731e5818 Mon Sep 17 00:00:00 2001
From: Michal Moskal <michal@moskal.me>
Date: Fri, 26 Aug 2016 13:14:48 +0200
Subject: [PATCH] String/ptr -> boolean helpers added

---
 libs/microbit/core.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/libs/microbit/core.cpp b/libs/microbit/core.cpp
index 8e18ad65..212e0d6e 100644
--- a/libs/microbit/core.cpp
+++ b/libs/microbit/core.cpp
@@ -276,6 +276,34 @@ namespace pxtrt {
     microbit_panic(code);
   }
 
+  //%
+  int stringToBool(StringData *s) {
+    if (s == NULL) return 0;
+    if (s->len == 0) {
+      s->decr();
+      return 0;
+    }
+    s->decr();
+    return 1;
+  }
+
+  //%
+  StringData* emptyToNull(StringData *s) {
+    if (!s || s->len == 0)
+      return NULL;
+    return s;
+  }
+
+  //%
+  int ptrToBool(uint32_t p) {
+    if (p) {
+      decr(p);
+      return 1;
+    } else {
+      return 0;
+    }
+  }
+
   //
   // Debugger
   //