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kprintf and kprint_float

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This commit is contained in:
Liam Kerr 2026-02-09 02:55:15 +00:00
parent 6208ae369d
commit 2564aa6aba
4 changed files with 28 additions and 2 deletions
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23
src/drivers/uart.c
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@ -38,6 +38,22 @@ void kprint_int(int num) {
}
}
void kprint_float(float num) {
if (num < 0) {
kputchar('-');
num = -num;
}
int int_part = (int)num;
float frac_part = num - int_part;
kprint_int(int_part);
kputchar('.');
for (int i = 0; i < 6; i++) {
frac_part *= 10.0f;
}
int fraction = (int)(frac_part + 0.5f); // Round to nearest
kprint_int(fraction);
}
void kprint_hex(uint64_t val) {
char *digits = "0123456789ABCDEF";
char buffer[16]; // 64-bit hex is 16 chars
@ -79,6 +95,11 @@ void kprintf(const char *format, ...) {
kprint_int(d);
break;
}
case 'f': {
double f = va_arg(args, double);
kprint_float((float)f);
break;
}
case 'x': // Hex
case 'p': { // Pointer
uint64_t x = va_arg(args, uint64_t);
@ -97,5 +118,5 @@ void kprintf(const char *format, ...) {
kputchar(*p);
}
}
knewline();
}