63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
#ifndef TYCHE_BYTECODE_HH
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#define TYCHE_BYTECODE_HH
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#include "bytearray.hh"
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#include "bytecodeprototype.hh"
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namespace tyche {
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class Bytecode {
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public:
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explicit Bytecode(ByteArray ba);
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[[nodiscard]] uint32_t n_constants() const;
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[[nodiscard]] uint32_t n_functions() const;
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[[nodiscard]] float get_constant_float(uint32_t idx) const;
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[[nodiscard]] std::string get_constant_string(uint32_t idx) const;
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struct FunctionDef { uint16_t n_params, locals; };
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[[nodiscard]] FunctionDef get_function_def(uint32_t function_id) const;
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[[nodiscard]] uint32_t get_function_sz(uint32_t function_id) const;
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[[nodiscard]] uint8_t get_code_byte(uint32_t function_id, uint32_t idx) const;
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[[nodiscard]] int8_t get_code_int8(uint32_t function_id, uint32_t idx) const;
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[[nodiscard]] int16_t get_code_int16(uint32_t function_id, uint32_t idx) const;
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[[nodiscard]] int32_t get_code_int32(uint32_t function_id, uint32_t idx) const;
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// TODO - debugging info
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[[nodiscard]] static ByteArray generate(BytecodePrototype const& bp);
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private:
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ByteArray byte_array_; // the actual data
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static constexpr uint8_t BYTECODE_VERSION = 1;
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static constexpr uint32_t MAGIC_NUMBER = 0x74b3c138;
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static constexpr uint32_t TOC_START = 16,
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TOC_N_RECORDS = 8,
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TOC_RECORD_SZ = 8,
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TOC_SZ = TOC_N_RECORDS * TOC_RECORD_SZ;
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static constexpr uint32_t CONST_IDX_START = TOC_START + TOC_SZ,
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CONST_RECORD_SZ = 4;
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static constexpr uint32_t FUNCTION_RECORD_SZ = 12;
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enum Sections { SEC_CONST_IDX = 0, SEC_FUNC_IDX = 1, SEC_CONST_DATA = 2, SEC_CODE = 3 };
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// caching for faster reading of data
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struct Cache {
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uint32_t constants_idx_addr;
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uint16_t n_constants;
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uint32_t constants_start_addr;
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uint32_t functions_idx_addr;
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uint32_t n_functions;
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std::vector<uint32_t> function_addr;
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std::vector<uint32_t> function_sz;
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};
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Cache cache_ {};
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};
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}
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#endif //TYCHE_BYTECODE_HH
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