From 34bc88eab5eee1cf8fdcab62575167a65fb372af Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Sun, 12 Feb 2012 19:18:58 +1100
Subject: [PATCH] AP_Param: added generic cast_to_float

---
 libraries/AP_Common/AP_Param.cpp | 18 ++++++++++++++++++
 libraries/AP_Common/AP_Param.h   |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/libraries/AP_Common/AP_Param.cpp b/libraries/AP_Common/AP_Param.cpp
index a6bdf8c707..440349b718 100644
--- a/libraries/AP_Common/AP_Param.cpp
+++ b/libraries/AP_Common/AP_Param.cpp
@@ -650,3 +650,21 @@ AP_Param *AP_Param::next_scalar(uint32_t *token, enum ap_var_type *ptype)
     }
     return ap;
 }
+
+
+/// cast a variable to a float given its type
+float AP_Param::cast_to_float(enum ap_var_type type)
+{
+    switch (type) {
+    case AP_PARAM_INT8:
+        return ((AP_Int8 *)this)->cast_to_float();
+    case AP_PARAM_INT16:
+        return ((AP_Int16 *)this)->cast_to_float();
+    case AP_PARAM_INT32:
+        return ((AP_Int32 *)this)->cast_to_float();
+    case AP_PARAM_FLOAT:
+        return ((AP_Float *)this)->cast_to_float();
+    default:
+        return NAN;
+    }
+}
diff --git a/libraries/AP_Common/AP_Param.h b/libraries/AP_Common/AP_Param.h
index 5495db6a8a..fcccd44482 100644
--- a/libraries/AP_Common/AP_Param.h
+++ b/libraries/AP_Common/AP_Param.h
@@ -143,6 +143,9 @@ public:
     /// as needed
     static AP_Param *next_scalar(uint32_t *token, enum ap_var_type *ptype);
 
+    /// cast a variable to a float given its type
+    float cast_to_float(enum ap_var_type type);
+
 private:
     /// EEPROM header
     ///