#pragma once

#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <vector>
#include <algorithm>
#include <string>
#include <stdio.h>
#if defined(WIN32) || defined(_WIN64)
#define bzero(b, s)		memset(b, 0, s)
#else
#include <iconv.h>
#endif
#include "../sdk/hginclude/huagaoxxx_warraper_ex.h"
#include "sane/sane_ex.h"
#include "json.h"

namespace local_utility
{
	void* acquire_memory(size_t bytes, const char* info);
	void free_memory(void* m);
};

class sane_std_opts
{
	typedef struct _sane_opt
	{
		SANE_Option_Descriptor* desc;
		int						opt;
	}SANEOPT;
	typedef struct _opt_map
	{
		SANEOPT		known;
		SANEOPT		user;
		std::string	init;
	}OPTMAP;
	std::vector<OPTMAP>		known_opts_;
	int						opt_num_base_;
	int						page_width_;
	int						page_height_;

	SANE_Option_Descriptor* get_known_option(int opt, int* ind = nullptr);
	SANE_Option_Descriptor* get_known_option(const char* name, int* ind = nullptr);
	void to_known_opt_value(OPTMAP* opmap, const void* data, void* known_data);
	void* from_known_opt_value(OPTMAP* opmap, const void* known_data, long* len);

public:
	sane_std_opts(int opt_base);
	~sane_std_opts();

public:
	static json* get_opt_json(scanner_handle h, int opt);		// call delete to free the returned object
	static void* get_current_value(scanner_handle h, int opt);	// call local_utility::free_memory to free the returned buffer

public:
	void init_known_opt(int option, SANE_Option_Descriptor* desc);
	SANE_Option_Descriptor* get_option(int option);
	void clear(void);

	bool is_known_option(int opt, SANE_Option_Descriptor** user = nullptr);
	void* get_default_value(scanner_handle h, int opt);				// call local_utility::free_memory to free the returned buffer
	scanner_err get_value(scanner_handle h, int opt, void* buf);	// call this ONLY when is_known_option returnning true
	scanner_err set_value(scanner_handle h, int opt, void* buf);	// call this ONLY when is_known_option returnning true
};