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#include <stdio.h>
#include <string.h>
static char buffer[3 * sizeof(int) + 2];
extern "C" int
vfprintf(FILE *restrict stream, const char *restrict format, va_list params)
{
int written = 0;
int s = 0;
int l = 0;
for (int i = 0; format[i] != '\0'; ++i) {
if (format[i] == '%') {
written += stream->puts(&format[s], l);
s = i + 2;
++i;
switch (format[i]) {
case 's': {
const char *arg = va_arg(params, const char *);
written += stream->puts(arg, -1);
} break;
case 'c': {
const int arg = va_arg(params, int);
stream->putc(arg);
++written;
} break;
case 'd': {
const char *arg = itoa(buffer, va_arg(params, int), 10);
written += stream->puts(arg, -1);
} break;
case 'u': {
const char *arg = utoa(buffer, va_arg(params, unsigned int), 10);
written += stream->puts(arg, -1);
} break;
case 'x': {
const char *arg = utoa(buffer, va_arg(params, unsigned int), 16);
written += stream->puts(arg, -1);
} break;
}
l = 0;
}
else
++l;
}
if (l > 0) { written += stream->puts(&format[s], l); }
stream->flush();
return written;
}
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