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generator/smoke.h  view on Meta::CPAN

public:
    union StackItem; // defined below
    /**
     * A stack is an array of arguments, passed to a method when calling it.
     */
    typedef StackItem* Stack;

    enum EnumOperation {
	EnumNew,
	EnumDelete,
	EnumFromLong,
	EnumToLong
    };

    typedef short Index;
    typedef void (*ClassFn)(Index method, void* obj, Stack args);
    typedef void* (*CastFn)(void* obj, Index from, Index to);
    typedef void (*EnumFn)(EnumOperation, Index, void*&, long&);

    /**
     * Describe one index in a given module.
     */
    struct ModuleIndex {
        Smoke* smoke;
        Index index;
        ModuleIndex() : smoke(0), index(0) {}
        ModuleIndex(Smoke * s, Index i) : smoke(s), index(i) {}
        
        inline bool operator==(const Smoke::ModuleIndex& other) const {
            return index == other.index && smoke == other.smoke;
        }
        
        inline bool operator!=(const Smoke::ModuleIndex& other) const {
            return index != other.index || smoke != other.smoke;
        }
    };
    /**
     * A ModuleIndex with both fields set to 0.
     */
    static ModuleIndex NullModuleIndex; 
    
    typedef std::map<std::string, ModuleIndex> ClassMap;
    static ClassMap classMap;

    enum ClassFlags {
        cf_constructor = 0x01,  // has a constructor
        cf_deepcopy = 0x02,     // has copy constructor
        cf_virtual = 0x04,      // has virtual destructor
        cf_namespace = 0x08,    // is a namespace
        cf_undefined = 0x10     // defined elsewhere
    };
    /**
     * Describe one class.
     */
    struct Class {
	const char *className;	// Name of the class
	bool external;		// Whether the class is in another module
	Index parents;		// Index into inheritanceList
	ClassFn classFn;	// Calls any method in the class
	EnumFn enumFn;		// Handles enum pointers
        unsigned short flags;   // ClassFlags
        unsigned int size;
    };

    enum MethodFlags {
        mf_static = 0x01,
        mf_const = 0x02,
        mf_copyctor = 0x04,  // Copy constructor
        mf_internal = 0x08,   // For internal use only
        mf_enum = 0x10,   // An enum value
        mf_ctor = 0x20,
        mf_dtor = 0x40,
        mf_protected = 0x80,
        mf_attribute = 0x100,   // accessor method for a field
        mf_property = 0x200,    // accessor method of a property
        mf_virtual = 0x400,
        mf_purevirtual = 0x800,
        mf_signal = 0x1000, // method is a signal
        mf_slot = 0x2000,   // method is a slot
        mf_explicit = 0x4000    // method is an 'explicit' constructor
    };
    /**
     * Describe one method of one class.
     */
    struct Method {
	Index classId;		// Index into classes
	Index name;		// Index into methodNames; real name
	Index args;		// Index into argumentList
	unsigned char numArgs;	// Number of arguments
	unsigned short flags;	// MethodFlags (const/static/etc...)
	Index ret;		// Index into types for the return type
	Index method;		// Passed to Class.classFn, to call method
    };

    /**
     * One MethodMap entry maps the munged method prototype
     * to the Method entry.
     *
     * The munging works this way:
     * $ is a plain scalar
     * # is an object
     * ? is a non-scalar (reference to array or hash, undef)
     *
     * e.g. QApplication(int &, char **) becomes QApplication$?
     */
    struct MethodMap {
	Index classId;		// Index into classes
	Index name;		// Index into methodNames; munged name
	Index method;		// Index into methods
    };

    enum TypeFlags {
        // The first 4 bits indicate the TypeId value, i.e. which field
        // of the StackItem union is used.
        tf_elem = 0x0F,

	// Always only one of the next three flags should be set
	tf_stack = 0x10, 	// Stored on the stack, 'type'
	tf_ptr = 0x20,   	// Pointer, 'type*'
	tf_ref = 0x30,   	// Reference, 'type&'
	// Can | whatever ones of these apply
	tf_const = 0x40		// const argument
    };
    /**
     * One Type entry is one argument type needed by a method.
     * Type entries are shared, there is only one entry for "int" etc.
     */
    struct Type {
	const char *name;	// Stringified type name
	Index classId;		// Index into classes. -1 for none
        unsigned short flags;   // TypeFlags
    };

    // We could just pass everything around using void* (pass-by-reference)
    // I don't want to, though. -aw
    union StackItem {
	void* s_voidp;
	bool s_bool;
	signed char s_char;
	unsigned char s_uchar;
	short s_short;
	unsigned short s_ushort;
	int s_int;
	unsigned int s_uint;
	long s_long;
	unsigned long s_ulong;
	float s_float;
	double s_double;
        long s_enum;
        void* s_class;
    };
    enum TypeId {
	t_voidp,
	t_bool,
	t_char,
	t_uchar,
	t_short,
	t_ushort,
	t_int,
	t_uint,
	t_long,
	t_ulong,
	t_float,
	t_double,
        t_enum,
        t_class,
	t_last		// number of pre-defined types
    };

    // Passed to constructor
    /**
     * The classes array defines every class for this module
     */
    Class *classes;
    Index numClasses;

    /**
     * The methods array defines every method in every class for this module
     */
    Method *methods;
    Index numMethods;

    /**
     * methodMaps maps the munged method prototypes
     * to the methods entries.
     */
    MethodMap *methodMaps;
    Index numMethodMaps;

    /**
     * Array of method names, for Method.name and MethodMap.name