From 095d686cabad40b847a608d1c8dd73ef6fd96e96 Mon Sep 17 00:00:00 2001
From: Frank Wuerthwein <fkw@ucsd.edu>
Date: Wed, 11 Feb 2009 23:59:12 +0000
Subject: Add getDSbyName

---
 src/lib/rrdFile.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/lib/rrdFile.js b/src/lib/rrdFile.js
index f592643..aee1112 100644
--- a/src/lib/rrdFile.js
+++ b/src/lib/rrdFile.js
@@ -304,6 +304,15 @@ RRDHeader.prototype.getDS = function(idx) {
     throw RangeError("DS idx ("+ idx +") out of range [0-" + this.ds_cnt +").");
   }	
 }
+RRDHeader.prototype.getDSbyName = function(name) {
+  for (var idx=0; idx<this.ds_cnt; idx++) {
+    var ds=this.getDS(idx);
+    var ds_name=ds.getName()
+    if (ds_name==name)
+      return idx;
+  }
+  return undefined;
+}
 
 RRDHeader.prototype.getNrRRAs = function() {
   return this.rra_cnt;
@@ -346,6 +355,9 @@ function RRDFile(bf) {
   this.getDS = function(idx) {
     return this.rrd_header.getDS(idx);
   }
+  this.getDSbyName = function(name) {
+    return this.rrd_header.getDSbyName(name);
+  }
 
   this.getNrRRAs = function() {
     return this.rrd_header.getNrRRAs();
-- 
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