2 files changed, 28 insertions, 0 deletions
diff --git a/src/utils/utils.cpp b/src/utils/utils.cpp
new file mode 100644
index 0000000..a1818a0
--- /dev/null
+++ b/src/utils/utils.cpp
@@ -0,0 +1,23 @@
+#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);
+	}
+}
diff --git a/src/utils/utils.hpp b/src/utils/utils.hpp
new file mode 100644
index 0000000..7c5a546
--- /dev/null
+++ b/src/utils/utils.hpp
@@ -0,0 +1,5 @@
+#pragma once
+
+#include <string>
+
+void format_rate(std::string & s, double rate);