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#include <stdarg.h>
#include <stdbool.h>
#include "serial.h"
#include "log.h"
#define LOG_COM COM1
void init_log() {
//TODO: move old "sys/current.log"
//TODO: open new "sys/current.log"
}
static const char *const log_prefixes[] = {
" [USER] ",
" [INFO] ",
" [DUMP] ",
" [WARN] ",
"[ERROR] ",
"[PANIC] ",
};
static inline void logch(char ch) {
sout(LOG_COM, ch);
//TODO: write to log file as well
}
static const char hex_table[] = "0123456789abcdef";
void logf(enum log_level level, const char *format, ...) {
va_list args;
va_start(args, format);
const char *log_prefix = log_prefixes[level];
while (*log_prefix)
logch(*(log_prefix++));
for (const char *fi = format; *fi;)
if (*fi != '%')
logch(*(fi++));
else {
switch (*(fi + 1)) {
case '%':
logch('%');
break;
case 'c':;
const char c = (char)va_arg(args, uint32_t);
logch(c);
break;
case 's':;
const char *s = va_arg(args, const char *);
while (*s)
logch(*(s++));
break;
case 'd':;
const uint32_t d = va_arg(args, uint32_t);
if (d == 0) {
logch('0');
break;
}
bool zeros = false;
for (uint32_t place = 1000000000; place; place /= 10) {
uint8_t digit = (d / place) % 10;
if (digit)
zeros = true;
if (zeros)
logch(digit | '0');
}
break;
case 'h':;
const uint32_t h = va_arg(args, uint32_t);
uint32_t shift = 32;
if (*(fi + 2) == 'b') {
shift = 8;
++fi;
}
else if (*(fi + 2) == 'w') {
shift = 16;
++fi;
}
else if (*(fi + 2) == 'd') {
++fi;
}
while (shift)
logch(hex_table[(h >> (shift -= 4)) & 0xf]);
break;
default:
logch('%');
logch(*(fi + 1));
}
fi += 2;
}
logch('\n');
va_end(args);
}
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