From 6bffea953dcd596f71c696fedf906e85e4b1315d Mon Sep 17 00:00:00 2001
From: Deukhoofd <deukhoofd@gmail.com>
Date: Wed, 4 Mar 2020 15:00:57 +0100
Subject: [PATCH] Implements extern growthrate that uses function pointers.

---
 CInterface/Library/GrowthRate.cpp            |  6 ++++++
 src/Library/GrowthRates/ExternGrowthRate.hpp | 19 +++++++++++++++++++
 src/Library/GrowthRates/GrowthRate.cpp       |  1 -
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 src/Library/GrowthRates/ExternGrowthRate.hpp
 delete mode 100644 src/Library/GrowthRates/GrowthRate.cpp

diff --git a/CInterface/Library/GrowthRate.cpp b/CInterface/Library/GrowthRate.cpp
index a361108..ebb0065 100644
--- a/CInterface/Library/GrowthRate.cpp
+++ b/CInterface/Library/GrowthRate.cpp
@@ -1,4 +1,5 @@
 #include "../../src/Library/GrowthRates/GrowthRate.hpp"
+#include "../../src/Library/GrowthRates/ExternGrowthRate.hpp"
 #include "../../src/Library/GrowthRates/LookupGrowthRate.hpp"
 #define export extern "C"
 using namespace CreatureLib::Library;
@@ -8,6 +9,11 @@ export GrowthRate* CreatureLib_LookupGrowthRate_Construct(uint32_t experiencePer
     return new LookupGrowthRate(exp);
 };
 
+export GrowthRate* CreatureLib_ExternGrowthRate_Construct(uint8_t (*calcLevel)(uint32_t),
+                                                          uint32_t (*calcExperience)(uint8_t)) {
+    return new ExternGrowthRate(calcLevel, calcExperience);
+};
+
 export void CreatureLib_GrowthRate_Destruct(const GrowthRate* p) { delete p; }
 
 export uint8_t CreatureLib_GrowthRate_CalculateLevel(const GrowthRate* p, uint32_t experience) {
diff --git a/src/Library/GrowthRates/ExternGrowthRate.hpp b/src/Library/GrowthRates/ExternGrowthRate.hpp
new file mode 100644
index 0000000..fd534ae
--- /dev/null
+++ b/src/Library/GrowthRates/ExternGrowthRate.hpp
@@ -0,0 +1,19 @@
+#ifndef CREATURELIB_EXTERNGROWTHRATE_HPP
+#define CREATURELIB_EXTERNGROWTHRATE_HPP
+
+#include "GrowthRate.hpp"
+namespace CreatureLib::Library {
+    class ExternGrowthRate : public GrowthRate {
+        uint8_t (*_calcLevel)(uint32_t experience);
+        uint32_t (*_calcExperience)(uint8_t level);
+
+    public:
+        ExternGrowthRate(uint8_t (*calcLevel)(uint32_t), uint32_t (*calcExperience)(uint8_t level))
+            : _calcLevel(calcLevel), _calcExperience(calcExperience) {}
+
+        uint8_t CalculateLevel(uint32_t experience) const override { return _calcLevel(experience); }
+        uint32_t CalculateExperience(uint8_t level) const override { return _calcExperience(level); }
+    };
+}
+
+#endif // CREATURELIB_EXTERNGROWTHRATE_HPP
diff --git a/src/Library/GrowthRates/GrowthRate.cpp b/src/Library/GrowthRates/GrowthRate.cpp
deleted file mode 100644
index 4341d03..0000000
--- a/src/Library/GrowthRates/GrowthRate.cpp
+++ /dev/null
@@ -1 +0,0 @@
-#include "GrowthRate.hpp"