From ebb2a0279c3a10165d7140a4a67870e59a2f6f7c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@higgsboson.tk>
Date: Tue, 28 Apr 2015 15:24:28 +0200
Subject: [PATCH] bucketsort: add comments

---
 c_sequential/bucketsort/bucketsort.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/c_sequential/bucketsort/bucketsort.c b/c_sequential/bucketsort/bucketsort.c
index 888ffb2..22b4041 100644
--- a/c_sequential/bucketsort/bucketsort.c
+++ b/c_sequential/bucketsort/bucketsort.c
@@ -2,6 +2,8 @@
 #include <string.h>
 #include "bucketsort.h"
 
+// Printable characters in Ascii (from 34 to 127);
+// actually 127 is also not printable
 #define N_BUCKETS 94
 
 typedef struct {
@@ -42,6 +44,7 @@ long int* bucket_sort(char *a, int length, long int size) {
 
 	// copy the keys to "buckets"
 	for (i = 0; i < size; i++) {
+		// 0x21 = 33d, number of unprintable characters in Ascii
 		b = &buckets[*(a + i * length) - 0x21];
 		b->data[b->total++] = i;
 	}