initial commit

src/misc.c

@@ -0,0 +1,19 @@
+#include <stdbool.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+bool is_float(const char *s, float dest) {
+	if (s == NULL) {
+		return false;
+	}
+	char *endptr;
+	dest = (float) strtod(s, &endptr);
+	if (s == endptr) {
+		return false;
+	}
+	while (isspace((unsigned char ) *endptr)) {
+		endptr++;
+	}
+	return *endptr == '\0';
+}