54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
#ifndef roza_VM_HPP
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#define roza_VM_HPP
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#include "commons.hpp"
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#include "Program.hpp"
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#include "StatusLog.hpp"
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namespace roza
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{
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using unop_t = std::function<std::shared_ptr<Value>
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(std::shared_ptr<Value>)>;
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using binop_t = std::function<std::shared_ptr<Value>
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(std::shared_ptr<Value>,
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std::shared_ptr<Value>)>;
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using var_map = std::unordered_map<int, std::shared_ptr<Value>>;
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struct Frame {
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var_map locals;
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size_t pc;
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size_t sp;
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size_t bp;
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};
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class VM
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{
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public:
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explicit VM(StatusLog& log);
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virtual ~VM();
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void exec(std::shared_ptr<Program> program);
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std::string string() const;
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private:
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StatusLog& m_log;
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std::array<param_t, 4096> m_stack;
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std::shared_ptr<Program> m_last_program;
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var_map m_globals;
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std::vector<Frame> m_frames;
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size_t m_sp = 0;
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size_t m_bp = 0;
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size_t m_pc = 0;
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void push(param_t param);
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param_t pop();
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void apply_binop(std::shared_ptr<Program> program, binop_t op);
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void apply_unop(std::shared_ptr<Program> program, unop_t op);
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};
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}
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#endif
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