int vprintf (char* fmt_, va_list args_) {
for (int i = 0; fmt_[i] != '\0'; i++) {
if (fmt_[i] == '%') {
union u_size u;
u.l = va_arg(args_, unsigned long);
switch (fmt_[i+1]) {
case 'd':{
putint_i(u.i,10);
}break;
case 'i': {
putint_i(u.i,10);
}break;
case 's':{
putc_s (u.p);
}break;
case 'c':{
putc_i (u.c);
}break;
case 'x':{
putc_s("0x");
putint_i(u.u,16);
}break;
}
i++;
} else {
putc_i (fmt_[i]);
}
}
int puts_in(char *s, char **buffer, size_t *len) {
int res = 0;
for (int i = 0; s[i] != 0; ++i) {
if (putc_s(s[i], buffer, len)) {
++res;
} else {
break;
}
}
return res;
}
int print_int(int64_t x, char **buffer, size_t *len) {
if (x == LLONG_MIN) {
return puts_in("-9223372036854775808", buffer, len);
}
int res = 0;
if (x < 0) {
if (putc_s('-', buffer, len)) {
++res;
}
x = -x;
}
return res + print_uint(x, 10, buffer, len);
}
int print_uint(uint64_t x, int base, char **buffer, size_t *len) {
static char buff[30];
if (x == 0) {
return puts_in("0", buffer, len);
}
int i = 0;
int res = 0;
for (; x != 0; ++i) {
buff[i] = x % base + '0';
if (buff[i] > 9 + '0') {
buff[i] = buff[i] - '0' - 10 + 'a';
}
x /= base;
}
for (int j = i - 1; j >= 0; --j) {
if (putc_s(buff[j], buffer, len)) {
++res;
} else {
break;
}
}
return res;
}
