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#include <stdbool.h>
#include "kprintf.h"
#include "asm_inline.h"
// #define KDEBUG
int check_transmission() {
return inb(COM1 + 5) & 0x20;
}
void write_serial_char(char a) {
while (check_transmission() == 0);
outb(COM1,a);
}
void write_serial_string(const char* str)
{
while(*str != '\0')
{
if(*str == '\n')
{
write_serial_char('\r');
}
write_serial_char(*str);
str++;
}
}
char* convert_U_integer(uint64_t n, uint16_t base, bool caps)
{
static char* format = "0123456789abcdef";
static char* C_format = "0123456789ABCDEF";
static char buffer[50];
char *ptr;
ptr = &buffer[49];
*ptr = '\0';
do
{
if(caps)
{
*--ptr = C_format[n%base];
}
else
{
*--ptr = format[n%base];
}
n /= base;
} while(n != 0);
return ptr;
}
void kprintf(const char* str, ...)
{
va_list args;
va_start(args, str);
while(*str)
{
if(*str == '%')
{
#ifdef KDEBUG
write_serial_string("{stradv}");
#endif
str++;
if(*str == 'i' || *str == 'd')
{
#ifdef KDEBUG
write_serial_string("[INT]");
#endif
int32_t n = va_arg(args, int32_t);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'u')
{
#ifdef KDEBUG
write_serial_string("[UINT]");
#endif
uint32_t n = va_arg(args, uint32_t);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'x')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint32_t n = va_arg(args, uint32_t);
char* s = convert_U_integer(n, 16, false);
write_serial_string("0x");
write_serial_string(s);
}
else if(*str == 'X')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint32_t n = va_arg(args, uint32_t);
char* s = convert_U_integer(n, 16, true);
write_serial_string("0x");
write_serial_string(s);
}
else if(*str == 'l')
{
#ifdef KDEBUG
write_serial_string("[LONG]");
write_serial_string("{ladv}");
#endif
str++;
if(*str == 'i' || *str == 'd')
{
#ifdef KDEBUG
write_serial_string("[INT]");
#endif
int64_t n = va_arg(args, int64_t);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'u')
{
#ifdef KDEBUG
write_serial_string("[UINT]");
#endif
uint64_t n = va_arg(args, uint64_t);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'x')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint64_t n = va_arg(args, uint64_t);
char* s = convert_U_integer(n, 16, false);
write_serial_string("0x");
write_serial_string(s);
}
else if(*str == 'X')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint64_t n = va_arg(args, uint64_t);
char* s = convert_U_integer(n, 16, true);
write_serial_string("0x");
write_serial_string(s);
}
}
else if(*str == 'h')
{
#ifdef KDEBUG
write_serial_string("[SHORT]");
write_serial_string("{ladv}");
#endif
str++;
if(*str == 'i' || *str == 'd')
{
#ifdef KDEBUG
write_serial_string("[INT]");
#endif
int16_t n = va_arg(args, int);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'u')
{
#ifdef KDEBUG
write_serial_string("[UINT]");
#endif
uint16_t n = va_arg(args, int);
char* s = convert_U_integer(n, 10, false);
write_serial_string(s);
}
else if(*str == 'x')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint16_t n = va_arg(args, int);
char* s = convert_U_integer(n, 16, false);
write_serial_string("0x");
write_serial_string(s);
}
else if(*str == 'X')
{
#ifdef KDEBUG
write_serial_string("[HEX]");
#endif
uint16_t n = va_arg(args, int);
char* s = convert_U_integer(n, 16, true);
write_serial_string("0x");
write_serial_string(s);
}
}
else if(*str == 'p')
{
#ifdef KDEBUG
write_serial_string("[PTR]");
#endif
void* p = va_arg(args, void*);
uint64_t n = (uint64_t)p;
char* s = convert_U_integer(n, 16, true);
write_serial_string("0x");
write_serial_string(s);
}
else if(*str == 'c')
{
#ifdef KDEBUG
write_serial_string("[CHAR]");
#endif
char c = va_arg(args, int);
write_serial_char(c);
}
else if(*str == 's')
{
#ifdef KDEBUG
write_serial_string("[STR]");
#endif
char* s = va_arg(args, char*);
write_serial_string(s);
}
else
{
write_serial_string("\nFailed to write malformed kprintf: ");
write_serial_char(*str);
write_serial_string("\n");
va_end(args);
return;
}
#ifdef KDEBUG
write_serial_string("{pend}");
#endif
}
else if(*str == '\n')
{
write_serial_char('\r');
write_serial_char('\n');
}
else
{
write_serial_char(*str);
}
#ifdef KDEBUG
write_serial_string("{oadv}");
#endif
str++;
}
//write_serial_string(str);
va_end(args);
}
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