os-core/kernel/core/log.c

82 lines
1.3 KiB
C

/******************************************************************************
*
* Copyright (c) 2017-2019 by Löwenware Ltd
* Please, refer LICENSE file for legal information
*
******************************************************************************/
/**
* @file log.c
* @author Ilja Kartašov <ik@lowenware.com>
* @brief
*
* @see https://lowenware.com/
*/
#include <device/uart/uart.h>
#include "log.h"
void
k_log_init(void)
{
uart_init();
}
Ki32
k_logs(const Ki8 *string)
{
Ki8 c;
const Ki8 *p = string;
while((c = *p) != 0) {
if (uart_write(c))
return -1;
p++;
}
return (Ki32)(p - string);
}
Ki32
k_logi(Ki64 value, Ku8 base)
{
Ki32 result;
if (value < 0) {
if (uart_write('-'))
return -1;
value = -value;
result = 1;
} else {
result = 0;
}
result += k_logu(value, base);
return (result) ? result : -1;
}
Ki32
k_logu(Ku64 value, Ku8 base)
{
Ki32 i = 0, result;
Ku8 buffer[64];
if (!value) {
return (uart_write('0')) ? -1 : 1;
}
do {
if (!(i < (sizeof(buffer) / sizeof(buffer[0]))))
return -1;
Ku64 r = value % base;
buffer[i++] = (r < 0x0A) ? '0' + r : 'A' + r - 0x0A;
value /= base;
} while (value);
result = i;
while (i--) {
if (uart_write(buffer[i]))
return -1;
}
return result;
}