Changeset: 42 Change codegen input parsing to lookahead based; lookup table infra; input/output decl infra

1 files changed, 50 insertions, 0 deletions

diff --git a/buildtools/codegen/CodegenLookupTable.hpp b/buildtools/codegen/CodegenLookupTable.hpp
new file mode 100644
index 0000000..2b6a993
--- /dev/null
+++ b/buildtools/codegen/CodegenLookupTable.hpp
@@ -0,0 +1,50 @@
+#pragma once
+
+// BIDI stands for bi-directional
+#define BIDI_LUT_DECL(name, aType, aCount, bType, bCount) \
+	int gLut_##name##_A2B[aCount];                        \
+	int gLut_##name##_B2A[bCount];                        \
+	using name##AType = aType;                            \
+	using name##BType = bType;                            \
+	void InitializeLut##name()
+#define BIDI_LUT_MAP_FOR(name)              \
+	int* lutMappingA2B = gLut_##name##_A2B; \
+	int* lutMappingB2A = gLut_##name##_B2A
+#define BIDI_LUT_MAP(from, to) \
+	lutMappingA2B[from] = to;  \
+	lutMappingB2A[to] = from
+#define BIDI_LUT_INIT(name) InitializeLut##name()
+#define BIDI_LUT_A2B_LOOKUP(name, from) (name##BType)(gLut_##name##_A2B[from])
+#define BIDI_LUT_B2A_LOOKUP(name, to) (name##AType)(gLut_##name##_B2A[to])
+
+#define STR_LUT_DECL(name, enumMinValue, enumMaxValue)              \
+	constexpr int kLutMinVal_##name = enumMinValue;                 \
+	const char* gLut_##name[(int)enumMaxValue - (int)enumMinValue]; \
+	void InitializeLut##name()
+#define STR_LUT_MAP_FOR(name)              \
+	const char** lutMapping = gLut_##name; \
+	int lutMappingMinValue = kLutMinVal_##name
+#define STR_LUT_MAP(value, text) lutMapping[value - lutMappingMinValue] = text
+#define STR_LUT_MAP_ENUM(enumValue) STR_LUT_MAP(enumValue, #enumValue)
+#define STR_LUT_LOOKUP(name, enumValue) gLut_##name[enumValue - kLutMinVal_##name]
+#define STR_LUT_INIT(name) InitializeLut##name()
+
+// BSTR stands for bi-directional string
+#define BSTR_LUT_DECL(name, enumMinValue, enumMaxValue)                                         \
+	constexpr int kLutMinVal_##name = enumMinValue;                                             \
+	const char* gLut_##name##_V2S[(int)enumMaxValue - (int)enumMinValue];                       \
+	robin_hood::unordered_flat_map<std::string_view, decltype(enumMaxValue)> gLut_##name##_S2V; \
+	void InitializeLut##name()
+#define BSTR_LUT_MAP_FOR(name)                      \
+	const char** lutMappingV2S = gLut_##name##_V2S; \
+	auto& lutMappingS2V = gLut_##name##_S2V;        \
+	int lutMappingMinValue = kLutMinVal_##name
+#define BSTR_LUT_MAP(value, text)                     \
+	lutMappingV2S[value - lutMappingMinValue] = text; \
+	lutMappingS2V.insert_or_assign(std::string_view(text), value);
+#define BSTR_LUT_MAP_ENUM(enumValue) BSTR_LUT_MAP(enumValue, #enumValue)
+#define BSTR_LUT_V2S(name) gLut_##name##_V2S
+#define BSTR_LUT_S2V(name) gLut_##name##_S2V
+#define BSTR_LUT_V2S_LOOKUP(name, enumValue) gLut_##name##_V2S[enumValue - kLutMinVal_##name]
+#define BSTR_LUT_S2V_LOOKUP(name, string) gLut_##name##_S2V.find(std::string_view(text))
+#define BSTR_LUT_INIT(name) InitializeLut##name()