1 files changed, 25 insertions, 0 deletions
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..794eea7
--- /dev/null
+++ b/util.c
@@ -0,0 +1,25 @@
+#include <math.h>
+#include <string.h>
+
+#include "util.h"
+
+float pressure_to_metres_asl(float real, float setting)
+{
+	return 44330.f*(1.f-pow(real/setting, 1/5.255));
+}
+
+void blank_to_eol(char *line, size_t len)
+{
+	size_t i = 0;
+	for (i = strlen(line); i < len - 1; i++) {
+		line[i] = ' ';
+	}
+	line[i] = '\0';
+}
+
+void split_float(float input, int *integer_part, float *float_part)
+{
+	*integer_part = (int)input;
+	*float_part = fabs(input - *integer_part);
+}
+