#ifndef LINUX_CONSOLE_H
#define LINUX_CONSOLE_H

#include "linux_syscall.h"

static const char *addr_of_char(unsigned char ch)
{
	static const char byte[] = {
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
		0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
		0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
		0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
		0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
		0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
		0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
		0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
		0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
		0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
		0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
		0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
		0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
		0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
		0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
		0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
		0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
		0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
		0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
		0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
		0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
		0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
		0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
		0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
		0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
		0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
		0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
		0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
		0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
		0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
		0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
	};
	return byte + ch;
}

static void console_tx_byte(unsigned char ch)
{
	write(STDOUT_FILENO, addr_of_char(ch), 1);
}

static void console_tx_nibble(unsigned nibble)
{
	unsigned char digit;
	digit = nibble + '0';
	if (digit > '9') {
		digit += 39;
	}
	console_tx_byte(digit);
}

static void console_tx_char(unsigned char byte)
{
	console_tx_byte(byte);
}

static void console_tx_hex8(unsigned char value)
{
	console_tx_nibble((value >> 4U) & 0x0fU);
	console_tx_nibble(value & 0x0fU);
}

static void console_tx_hex16(unsigned short value)
{
	console_tx_nibble((value >> 12U) & 0x0FU);
	console_tx_nibble((value >>  8U) & 0x0FU);
	console_tx_nibble((value >>  4U) & 0x0FU);
	console_tx_nibble(value & 0x0FU);
}

static void console_tx_hex32(unsigned short value)
{
	console_tx_nibble((value >> 28U) & 0x0FU);
	console_tx_nibble((value >> 24U) & 0x0FU);
	console_tx_nibble((value >> 20U) & 0x0FU);
	console_tx_nibble((value >> 16U) & 0x0FU);
	console_tx_nibble((value >> 12U) & 0x0FU);
	console_tx_nibble((value >>  8U) & 0x0FU);
	console_tx_nibble((value >>  4U) & 0x0FU);
	console_tx_nibble(value & 0x0FU);
}

static void console_tx_string(const char *str)
{
	unsigned char ch;
	while((ch = *str++) != '\0') {
		console_tx_byte(ch);
	}
}

static void print_emerg_char(unsigned char byte) { console_tx_char(byte); }
static void print_emerg_hex8(unsigned char value) { console_tx_hex8(value); }
static void print_emerg_hex16(unsigned short value){ console_tx_hex16(value); }
static void print_emerg_hex32(unsigned int value) { console_tx_hex32(value); }
static void print_emerg(const char *str) { console_tx_string(str); }

static void print_warn_char(unsigned char byte) { console_tx_char(byte); }
static void print_warn_hex8(unsigned char value) { console_tx_hex8(value); }
static void print_warn_hex16(unsigned short value){ console_tx_hex16(value); }
static void print_warn_hex32(unsigned int value) { console_tx_hex32(value); }
static void print_warn(const char *str) { console_tx_string(str); }

static void print_info_char(unsigned char byte) { console_tx_char(byte); }
static void print_info_hex8(unsigned char value) { console_tx_hex8(value); }
static void print_info_hex16(unsigned short value){ console_tx_hex16(value); }
static void print_info_hex32(unsigned int value) { console_tx_hex32(value); }
static void print_info(const char *str) { console_tx_string(str); }

static void print_debug_char(unsigned char byte) { console_tx_char(byte); }
static void print_debug_hex8(unsigned char value) { console_tx_hex8(value); }
static void print_debug_hex16(unsigned short value){ console_tx_hex16(value); }
static void print_debug_hex32(unsigned int value) { console_tx_hex32(value); }
static void print_debug(const char *str) { console_tx_string(str); }

static void print_spew_char(unsigned char byte) { console_tx_char(byte); }
static void print_spew_hex8(unsigned char value) { console_tx_hex8(value); }
static void print_spew_hex16(unsigned short value){ console_tx_hex16(value); }
static void print_spew_hex32(unsigned int value) { console_tx_hex32(value); }
static void print_spew(const char *str) { console_tx_string(str); }

static void die(const char *str)
{
	print_emerg(str);
	do {
		asm volatile (" ");
	} while(1);
}
#endif /* LINUX_CONSOLE_H */