#pragma once

#include <climits>
#include <array>

class LuaIdentify
{
public:
	static std::array<unsigned char, UCHAR_MAX + 2> LuaCharType;
	static void AddIdentifyChar(char ch);
private:
};

// 保持lua惯用法

#define ALPHABIT	0
#define DIGITBIT	1
#define PRINTBIT	2
#define SPACEBIT	3
#define XDIGITBIT	4


#define MASK(B)		(1 << (B))


/*
** add 1 to char to allow index -1 (EOZ)
*/
#define testprop(c,p)	(LuaIdentify::LuaCharType[(c)+1] & (p))

/*
** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
*/
#define lislalpha(c)	testprop(c, MASK(ALPHABIT))
#define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
#define lisdigit(c)	testprop(c, MASK(DIGITBIT))
#define lisspace(c)	testprop(c, MASK(SPACEBIT))
#define lisprint(c)	testprop(c, MASK(PRINTBIT))
#define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
