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-rw-r--r--unit_label.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/unit_label.c b/unit_label.c
index d163404..b050b89 100644
--- a/unit_label.c
+++ b/unit_label.c
@@ -1,5 +1,22 @@
#include <unistd.h>
+/* Assign *unit a unit string from table unit_label that best fits value.
+ * returns the value reduced by the chosen unit's magnitude
+ *
+ * Tables are worked through in order, stopping at an entry with a falsey
+ * label. While the value is larger than the current unit's maximum count,
+ * the value is divided by this count and the next unit in the table is
+ * examined. Example:
+ * 100 flooby
+ * 500 glargle
+ * 30 lafplop // Can be any count
+ * 0 NULL // Can be any count
+ *
+ * Given this table, a value of:
+ * 150 will store glargle and return 1.5
+ * 50 will store flooby and return 50
+ * 55000 will store lafplop and return 1.1
+ */
double make_unit_whatsit(const struct unit_label l[], char **unit, double value) {
size_t i = 0;