#include "macro.h" 
#include "asm.h"
#include "types.h"

Pipe8 kbdp;
char kbdbuf[32];
void init_kbd(){
	pipe_init(&kbdp,kbdbuf,32);
	cputs("init_kbd(): Keyboard buffer OK\n",GREY);
}
static const char keymap[]={
	0,k_esc,'1','2','3','4','5','6','7','8','9','0','-','=','\b','\t',
	'q','w','e','r','t','y','u','i','o','p','[',']','\n',k_ctrl_l,'a','s',
	'd','f','g','h','j','k','l',';','\'','`',k_shift_l,'\\','z','x','c','v',
	'b','n','m',',','.','/',k_shift_r,'*',k_alt_l,' ',k_caps,k_f1,k_f2,k_f3,k_f4,k_f5,
	k_f6,k_f7,k_f8,k_f9,k_f10,k_nums,k_scr,'7','8','9','-','4','5','6','+','1',
	'2','3','0','1',0,0,0,k_f11,k_f12
};
static const char keymap_s[]={
	0,k_esc,'!','@','#','$','%','^','&','*','(',')','_','+','\b','\t',
	'Q','W','E','R','T','Y','U','I','O','P','{','}','\n',k_ctrl_l,'A','S',
	'D','F','G','H','J','K','L',':','\"','~',k_shift_l,'|','Z','X','C','V',
	'B','N','M','<','>','?',k_shift_r,'*',k_alt_l,' ',k_caps,k_f1,k_f2,k_f3,k_f4,k_f5,
	k_f6,k_f7,k_f8,k_f9,k_f10,k_nums,k_scr,k_home,k_up,k_pgup,'-',k_left,0,k_right,'+',k_end,
	k_down,k_pgdn,k_ins,k_del,0,0,0,k_f11,k_f12
};
/*
static const char keymap_e[]={
	[0x1d]k_ctrl_r,
	[0x35]'/',
	[0x38]k_alt_r
};
others are the same as keymap_s 
*/
/*
Specified:
prtsc	//it's like some 2 keys' combination
e0 2a e0 37
e0 b7 e0 aa
pause	//this key seems independent
e1 1d 45 e1 9d c5
none
*/
u8 read_kbdp(){
	while(pipe_size(&kbdp)==0);
	return read_pipe8(&kbdp);
}
int seekbd(){
  while(True){
	u8 code=read_kbdp();
	u8 ret;
	if(code<0x80){
		if(keystat&1)ret=keymap_s[code];
		else ret=keymap[code];
		if(keystat&2){
			if('a'<=ret && ret<='z')ret-=0x20;
			elif('A'<=ret && ret<='Z')ret+=0x20;
		}
		return ret;
	}
	elif(code==0xaa)return k_shift_ld;
	elif(code==0xb6)return k_shift_rd;
	elif(code==0x9d)return k_ctrl_ld;
	elif(code==0xb8)return k_alt_ld;
	elif(code==0xe0){
		u8 c1=read_kbdp();
		if(c1<0x80){
			if(c1==0x1c)ret='\n';
			elif(c1==0x1d)ret=k_ctrl_r;
			elif(c1==0x2a){
				read_kbdp();
				read_kbdp();
				ret=k_prtsc;
			}
			elif(c1==0x35)ret='/';
			elif(c1==0x38)ret=k_alt_r;
			else ret=keymap_s[c1];
			return ret;
		}else{
			if(c1==0xb7){
				read_kbdp();
				read_kbdp();
			}
			elif(c1==0x9d)return k_ctrl_rd;
			elif(c1==0xb8)return k_alt_rd;
		}
	}
	elif(code==0xe1){
		for(int i=0;i<5;i++)read_kbdp();
		return k_pause;
	}
  }
}