1 files changed, 19 insertions, 0 deletions
diff --git a/buildtools/codegen/CodegenLookupTable.h b/buildtools/codegen/CodegenLookupTable.h
new file mode 100644
index 0000000..02c0c7a
--- /dev/null
+++ b/buildtools/codegen/CodegenLookupTable.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#define LUT_DECL_VAR(name, aType, aCount, bType, bCount) \
+	int name##A2B[aCount];                               \
+	int name##B2A[bCount];                               \
+	using name##AType = aType;                           \
+	using name##BType = bType;                           \
+	void InitializeLookupTable_##name()
+
+#define LUT_MAP_FOR(name)           \
+	int* lutMappingA2B = name##A2B; \
+	int* lutMappingB2A = name##B2A
+#define LUT_MAP(from, to)     \
+	lutMappingA2B[from] = to; \
+	lutMappingB2A[to] = from
+
+#define LUT_INIT(name) InitializeLookupTable_##name()
+#define LUT_LOOKUP(name, from) (name##BType)(name##A2B[from])
+#define LUT_REV_LOOKUP(name, to) (name##AType)(name##B2A[to])