gravity_delegate.h

//
//  gravity_delegate.h
//  gravity
//
//  Created by Marco Bambini on 09/12/14.
//  Copyright (c) 2014 CreoLabs. All rights reserved.
//

#ifndef __GRAVITY_DELEGATE__
#define __GRAVITY_DELEGATE__

#include <stdint.h>
#include "gravity_value.h"

// error type and code definitions
typedef enum {
	GRAVITY_ERROR_NONE = 0,
	GRAVITY_ERROR_SYNTAX,
	GRAVITY_ERROR_SEMANTIC,
	GRAVITY_ERROR_RUNTIME,
	GRAVITY_ERROR_IO,
	GRAVITY_WARNING,
} error_type_t;

typedef struct {
	uint32_t		code;
	uint32_t		lineno;
	uint32_t		colno;
	uint32_t		fileid;
	uint32_t		offset;
} error_desc_t;

#define ERROR_DESC_NONE		(error_desc_t){0,0,0,0,0}

typedef void				(*gravity_log_callback)	(const char *message, void *xdata);
typedef void				(*gravity_error_callback) (error_type_t error_type, const char *description, error_desc_t error_desc, void *xdata);
typedef void				(*gravity_unittest_callback) (error_type_t error_type, const char *desc, const char *note, gravity_value_t value, int32_t row, int32_t col, void *xdata);
typedef void				(*gravity_parser_callback) (void *token, void *xdata);
typedef const char*			(*gravity_precode_callback) (void *xdata);
typedef const char*			(*gravity_loadfile_callback) (const char *file, size_t *size, uint32_t *fileid, void *xdata);
typedef const char*			(*gravity_filename_callback) (uint32_t fileid, void *xdata);

typedef bool				(*gravity_bridge_initinstance) (gravity_vm *vm, void *xdata, gravity_instance_t *instance, gravity_value_t args[], int16_t nargs);
typedef bool				(*gravity_bridge_setvalue) (gravity_vm *vm, void *xdata, gravity_value_t target, const char *key, gravity_value_t value);
typedef bool				(*gravity_bridge_getvalue) (gravity_vm *vm, void *xdata, gravity_value_t target, const char *key, uint32_t vindex);
typedef bool				(*gravity_bridge_setundef) (gravity_vm *vm, void *xdata, gravity_value_t target, const char *key, gravity_value_t value);
typedef bool				(*gravity_bridge_getundef) (gravity_vm *vm, void *xdata, gravity_value_t target, const char *key, uint32_t vindex);
typedef bool				(*gravity_bridge_execute)  (gravity_vm *vm, void *xdata, gravity_value_t args[], int16_t nargs, uint32_t vindex);
typedef uint32_t			(*gravity_bridge_size) (gravity_vm *vm, gravity_object_t *obj);
typedef void				(*gravity_bridge_free) (gravity_vm *vm, gravity_object_t *obj);

typedef struct {
	// user data
	void						*xdata;					// optional user data transparently passed between callbacks
	
	// callbacks
	gravity_log_callback		log_callback;			// log reporting callback
	gravity_error_callback		error_callback;			// error reporting callback
	gravity_unittest_callback	unittest_callback;		// special unit test callback
	gravity_parser_callback		parser_callback;		// parser callback used for syntax highlight
	gravity_precode_callback	precode_callback;		// called at parse time in order to give the opportunity to add custom source code
	gravity_loadfile_callback	loadfile_callback;		// callback to give the opportunity to load a file from an import statement
	gravity_filename_callback	filename_callback;		// called while reporting an error in order to be able to convert a fileid to a real filename
	
	// bridge
	gravity_bridge_initinstance	bridge_initinstance;	// init class
	gravity_bridge_setvalue		bridge_setvalue;		// setter
	gravity_bridge_getvalue		bridge_getvalue;		// getter
	gravity_bridge_setundef		bridge_setundef;		// setter not found
	gravity_bridge_getundef		bridge_getundef;		// getter not found
	gravity_bridge_execute		bridge_execute;			// execute a method/function
	gravity_bridge_size			bridge_size;			// size of obj
	gravity_bridge_free			bridge_free;			// free obj
} gravity_delegate_t;

#endif