From 965af120d6fd51a09b007c92921855a0d715014b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Bylica?= <pawel.bylica@imapp.pl>
Date: Mon, 1 Dec 2014 15:58:49 +0100
Subject: [PATCH] C Interface draft 1

---
 libevmjit/interface.c             | 30 ++++++++++++++++++++++++++++++
 windows/LibEvmJit.vcxproj         |  1 +
 windows/LibEvmJit.vcxproj.filters |  3 +++
 3 files changed, 34 insertions(+)
 create mode 100644 libevmjit/interface.c

diff --git a/libevmjit/interface.c b/libevmjit/interface.c
new file mode 100644
index 000000000..47589578b
--- /dev/null
+++ b/libevmjit/interface.c
@@ -0,0 +1,30 @@
+#include <stdint.h>
+
+// JIT object opaque type
+typedef struct evm_jit evm_jit;
+
+// Contract execution return code
+typedef int evm_jit_return_code;
+
+// Host-endian 256-bit integer type
+typedef struct i256 i256;
+
+// Big-endian right aligned 256-bit hash
+typedef struct h256 h256;
+
+// Runtime data struct - must be provided by external language (Go, C++, Python)
+typedef struct evm_jit_rt evm_jit_rt;
+
+// Runtime callback functions  - implementations must be provided by external language (Go, C++, Python)
+void evm_jit_rt_sload(evm_jit_rt* _rt, i256* _index, i256* _ret);
+void evm_jit_rt_sstore(evm_jit_rt* _rt, i256* _index, i256* _value);
+void evm_jit_rt_balance(evm_jit_rt* _rt, h256* _address, i256* _ret);
+// And so on...
+
+evm_jit* evm_jit_create(evm_jit_rt* _runtime_data);
+
+evm_jit_return_code evm_jit_execute(evm_jit* _jit);
+
+void evm_jit_get_return_data(evm_jit* _jit, char* _return_data_offset, size_t* _return_data_size);
+
+void evm_jit_destroy(evm_jit* _jit);
diff --git a/windows/LibEvmJit.vcxproj b/windows/LibEvmJit.vcxproj
index a9288a212..50824fb2d 100644
--- a/windows/LibEvmJit.vcxproj
+++ b/windows/LibEvmJit.vcxproj
@@ -131,6 +131,7 @@
     <ClCompile Include="..\libevmjit\ExecutionEngine.cpp" />
     <ClCompile Include="..\libevmjit\Ext.cpp" />
     <ClCompile Include="..\libevmjit\GasMeter.cpp" />
+    <ClCompile Include="..\libevmjit\interface.c" />
     <ClCompile Include="..\libevmjit\Memory.cpp" />
     <ClCompile Include="..\libevmjit\Runtime.cpp" />
     <ClCompile Include="..\libevmjit\Stack.cpp" />
diff --git a/windows/LibEvmJit.vcxproj.filters b/windows/LibEvmJit.vcxproj.filters
index ae89fe550..1a0d86e56 100644
--- a/windows/LibEvmJit.vcxproj.filters
+++ b/windows/LibEvmJit.vcxproj.filters
@@ -48,6 +48,9 @@
     <ClCompile Include="..\libevmjit\Arith256.cpp">
       <Filter>libevmjit</Filter>
     </ClCompile>
+    <ClCompile Include="..\libevmjit\interface.c">
+      <Filter>libevmjit</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\libevmjit\BasicBlock.h">