#include "utils/utils.hpp"

#include <cmath>
#include <cstdio>

void format_rate(std::string & s, double rate) {
	static const char MAX_FORMAT[] = "00000.00";

	if(std::isinf(rate) || std::isnan(rate)) {
		rate = 0.0;
	}

	s.resize(sizeof(MAX_FORMAT));

	int wrlen = snprintf(&s[0], s.size(), "%05.2f", rate);
	int sz = strlen(s.c_str());

	if(sz != wrlen) {
		s.assign("ERR");
	} else {
		s.resize(sz);
	}
}