luxos/Kernel/debug/logger.c

/*
 * logger.c
 *
 *  Created on: Sep 2, 2011
 *      Author: Tiberiu
 */
#include <debugio.h>
#include <stdlib.h>

string LogAllowedDevices[] = {
		"drivers",
		//"floppy",
		"hal",
		"fat",
		"initrd",
		"system",
		"vfs",
		//"mem",
		"console",
		"tasking",
		0x0,
		0x0
};


extern uint8 ConsoleDefaultColor;
extern void _write_char(char c);
extern void _write_string (string s);

int32 LogWrite (uint8 error, string device, string format, ...)
{
	if (!format || !*format || !device || !*device) return 0;

	// Print logged information
	va_list args;
	va_start (args, format);
	uint32 i, len = strlen(format);
	uint8 temp_color = ConsoleDefaultColor;

	// Check if device is allowed. Errors are allowed
	uint8 allowed = error;
	for (i = 0; LogAllowedDevices[i] != 0 && !allowed; i++)
		if (strcasecmp(device, LogAllowedDevices[i]) == 0) allowed = 1;

	if (allowed)
	{
		ConsoleDefaultColor = (error) ? Color(ColorRed, ColorWhite) : (1 + (i % 15)) ;
		_write_char('[');
		_write_string(device);
		_write_char(']');

		ConsoleDefaultColor = temp_color;
		_write_char(' ');
	}

	else return 0;

	for (i = 0; i < len; i++)
		if (format[i] != '%' && allowed) _write_char(format[i]);
		else
		{
			++i;
			switch (format[i]) {
				// Character
				case 'c': {
					char c = va_arg (args, char);
					_write_char(c);
					break;
				}

				// String
				case 's': {
					int32* c = (int32*) va_arg (args, string);
					_write_string((string)c);
					break;
				}

				// Integers
				case 'd':
				case 'i': {
					int32 c = va_arg(args, int32); char temp[32];
					ConvertIntToString(temp, c, 10);
					_write_string(temp);
					break;
				}

				// Integers - hex
				case 'X':
				case 'x': {
					int32 c = va_arg(args, int32); char temp[32];
					ConvertUIntToString(temp, c, 16);
					_write_string(temp);

					break;
				}

				// Integers - unsigned
				case 'u': {
					int32 c = va_arg(args, uint32); char temp[32];
					ConvertUIntToString (temp, c, 10);
					_write_string(temp);

					break;
					}

				// Colors
				case '#': {
					uint8 c = va_arg(args, uint8);
					ConsoleDefaultColor = c;
					break; }

				case '%' : _write_char('%'); break;
			};
		}

	va_end(args);

	ConsoleDefaultColor = temp_color;
	ConsoleCursorUpdateHardware();
	return i;
}