75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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#ifndef __ALEX_H
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#define __ALEX_H
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#ifndef __RECORDSET_H
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#include <recset.h>
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#endif
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class TVariant_stack : public TObject
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{
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TArray _var;
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int _sp;
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public:
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int items() const { return _sp; }
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bool drop();
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TVariant& pop();
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TVariant& peek(int depth = 0);
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void roll(int depth);
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void push(const TVariant& var);
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void push(long n);
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void push(const real& n);
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void push(const char* str);
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void reset();
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bool overflow() const;
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TVariant_stack() : _sp(0) { }
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};
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// Generic bytecode for any language
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class TBytecode : public TArray
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{
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TString _name;
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public:
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void set_name(const char* name) { _name = name; }
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const TString& name() const { return _name; }
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};
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// ALEX = Another Language EXtension
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class TAVM;
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class TAlex_virtual_machine : public TObject
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{
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TAVM* _avm; // Chesire's cat class
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protected:
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TAVM& avm();
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public:
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virtual size_t get_usr_words(TString_array& names) const;
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virtual bool execute_usr_word(unsigned int opcode, TVariant_stack& stack);
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virtual bool get_usr_val(const TString& name, TVariant& var) const;
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virtual bool set_usr_val(const TString& name, const TVariant& var);
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const TString& get_last_error() const;
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bool compile(istream& instr, TBytecode& bc);
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bool compile(const char* cmd, TBytecode& bc);
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bool execute(const TBytecode& bc, ostream& outstr);
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bool execute(const TBytecode& bc, TString& outstr);
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bool include(const char* fname);
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void warm_restart();
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void cold_restart();
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void set_interactive(bool inter);
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bool defined(const char* name);
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TAlex_virtual_machine();
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virtual ~TAlex_virtual_machine();
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};
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#endif
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