From 9fe238d0b36ce85661532b9df03c3cb4c0dfa873 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Fri, 20 Jan 2012 07:27:50 +0000
Subject: [PATCH] added support for rrdgraph to use the yotta, zetta, zepto,
 yocto prefixes. Fix for #333 (thanks Christoph)

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.4/program@2261 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 src/rrd_graph.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index e7776cd..28a4e4f 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -409,8 +409,11 @@ void auto_scale(
     }
 }
 
+/* power prefixes */
 
 static char si_symbol[] = {
+    'y',                /* 10e-24 Yocto */
+    'z',                /* 10e-21 Zepto */
     'a',                /* 10e-18 Atto */
     'f',                /* 10e-15 Femto */
     'p',                /* 10e-12 Pico */
@@ -424,8 +427,10 @@ static char si_symbol[] = {
     'T',                /* 10e12  Tera */
     'P',                /* 10e15  Peta */
     'E',                /* 10e18  Exa */
+    'Z',                /* 10e21  Zeta */
+    'Y'                 /* 10e24  Yotta */
 };
-static const int si_symbcenter = 6;
+static const int si_symbcenter = 8;
 
 /* find SI magnitude symbol for the numbers on the y-axis*/
 void si_unit(
-- 
2.30.2