Print gcc decimal128

decimal.c

#include <stdio.h>

int sprint(char* str, _Decimal128 value) {
	long long high = value;
	unsigned long long low;
	if (value > 0) {
		value = value * 10000000000000000000.0DL;
		low = value - high * 10000000000000000000.0DL;
	} else {
		value = value * -10000000000000000000.0DL;
		low = value + high * 10000000000000000000.0DL;
	}
	if (low > 0) {
		int n = sprintf(str, "%lld.%019llu", high, low);
		int i = 0;
		while (i < 18 && str[n - i - 1] == '0') i++;
		str[n - i] = 0;
		return n - i;
	} else {
		return sprintf(str, "%lld", high);
	}
}

int main() {
	char buffer[40];
	sprint(buffer, -12345678901234.035DL);	
	printf("%s\n", buf);
	return 0;
}