code_twain/twain/load_sane.h

#pragma once

// utility for loading sane component ...

#include "../sane/s2t_api.h"
#include <string>

namespace load_sane_util
{
	bool initialize(HMODULE me);
	bool is_ok(void);
	bool is_online(SCANNERID guid);
	ISaneInvoker* open(SCANNERID guid, int* err, bool last_try);
	void uninitialize(void);
	void log_info(const wchar_t* info, int level);

	std::string utf82ansi(const char* utf8);
	std::string ansi2utf8(const char* ansi);
	std::wstring ansi2unic(const char* ansi);

	int move_file(const char* from, const char* to);
	int move_file(const wchar_t* from, const wchar_t* to);

	template<typename ... Args>
	void to_log(const wchar_t* fmt, Args ... args)
	{
		size_t 		size = swprintf(nullptr, 0, fmt, args ...) + 2;
		std::unique_ptr<wchar_t[]> buf(new wchar_t[size]);
	
		swprintf(buf.get(), size, fmt, args ...);
		log_info(buf.get(), 0);
	}
};