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146 lines
3.4 KiB
C++
146 lines
3.4 KiB
C++
// See the file "COPYING" in the main distribution directory for copyright.
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#ifndef func_h
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#define func_h
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#include "BroList.h"
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#include "Obj.h"
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#include "Debug.h"
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class Val;
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class ListExpr;
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class FuncType;
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class Stmt;
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class Frame;
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class ID;
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class CallExpr;
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class Func : public BroObj {
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public:
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enum Kind { BRO_FUNC, BUILTIN_FUNC };
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Func(Kind arg_kind)
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{ scope = 0; kind = arg_kind; id = 0; return_value = 0; }
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virtual ~Func();
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virtual int IsPure() const = 0;
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int IsEvent() const { return FType()->IsEvent(); }
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struct Body {
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Stmt* stmts;
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int priority;
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bool operator<(const Body& other) const
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{ return priority > other.priority; } // reverse sort
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};
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const vector<Body>& GetBodies() const { return bodies; }
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bool HasBodies() const { return bodies.size(); }
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// virtual Val* Call(ListExpr* args) const = 0;
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virtual Val* Call(val_list* args, Frame* parent = 0) const = 0;
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// Add a new event handler to an existing function (event).
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virtual void AddBody(Stmt* new_body, id_list* new_inits,
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int new_frame_size, int priority = 0);
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virtual void SetScope(Scope* newscope) { scope = newscope; }
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virtual Scope* GetScope() const { return scope; }
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virtual FuncType* FType() const
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{
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return (FuncType*) id->Type()->AsFuncType();
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}
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Kind GetKind() const { return kind; }
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const ID* GetID() const { return id; }
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void SetID(ID *arg_id);
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virtual void Describe(ODesc* d) const = 0;
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virtual void DescribeDebug(ODesc* d, const val_list* args) const;
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// This (un-)serializes only a single body (as given in SerialInfo).
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bool Serialize(SerialInfo* info) const;
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static Func* Unserialize(UnserialInfo* info);
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ID* GetReturnValueID() const;
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virtual TraversalCode Traverse(TraversalCallback* cb) const;
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protected:
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Func() { scope = 0; id = 0; return_value = 0; }
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DECLARE_ABSTRACT_SERIAL(Func);
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vector<Body> bodies;
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Scope* scope;
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Kind kind;
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ID* id;
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ID* return_value;
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};
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class BroFunc : public Func {
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public:
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BroFunc(ID* id, Stmt* body, id_list* inits, int frame_size, int priority);
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~BroFunc();
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int IsPure() const;
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Val* Call(val_list* args, Frame* parent) const;
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void AddBody(Stmt* new_body, id_list* new_inits, int new_frame_size,
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int priority);
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int FrameSize() const { return frame_size; }
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void Describe(ODesc* d) const;
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protected:
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BroFunc() : Func(BRO_FUNC) {}
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Stmt* AddInits(Stmt* body, id_list* inits);
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DECLARE_SERIAL(BroFunc);
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int frame_size;
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};
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typedef Val* (*built_in_func)(Frame* frame, val_list* args);
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class BuiltinFunc : public Func {
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public:
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BuiltinFunc(built_in_func func, const char* name, int is_pure);
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~BuiltinFunc();
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int IsPure() const;
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Val* Call(val_list* args, Frame* parent) const;
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const char* Name() const { return name; }
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built_in_func TheFunc() const { return func; }
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void Describe(ODesc* d) const;
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protected:
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BuiltinFunc() { func = 0; name = 0; is_pure = 0; }
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DECLARE_SERIAL(BuiltinFunc);
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built_in_func func;
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const char* name;
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int is_pure;
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};
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extern void builtin_error(const char* msg, BroObj* arg = 0);
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extern void init_builtin_funcs();
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extern bool check_built_in_call(BuiltinFunc* f, CallExpr* call);
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// This global is set prior to the interpreter making a function call.
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// It's there so that built-in functions can access the location information
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// associated with a call when reporting error messages.
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extern const Expr* calling_expr;
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// This is set to true after the built-in functions have been initialized.
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extern bool did_builtin_init;
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#endif
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