From 1bfe54d664d929884a579973b00960b4348c4258 Mon Sep 17 00:00:00 2001
From: Arnur Nigmetov <a.nigmetov@gmail.com>
Date: Wed, 9 Nov 2016 22:55:55 +0100
Subject: Ignore zero persistence in the input

---
 geom_bottleneck/bottleneck/src/bottleneck.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/geom_bottleneck/bottleneck/src/bottleneck.cpp b/geom_bottleneck/bottleneck/src/bottleneck.cpp
index 365995a..34f7ed4 100644
--- a/geom_bottleneck/bottleneck/src/bottleneck.cpp
+++ b/geom_bottleneck/bottleneck/src/bottleneck.cpp
@@ -538,7 +538,13 @@ bool readDiagramPointSet(const char* fname, std::vector<std::pair<double, double
 #endif
             return false;
         }
-        result.push_back(std::make_pair(x,y));
+        if ( x != y ) {
+            result.push_back(std::make_pair(x,y));
+        } else {
+#ifndef FOR_R_TDA
+            std::cerr << "Warning: in file " << fname << ", line number " << lineNumber << ", zero persistence point: \"" << line << "\"" << std::endl;
+#endif
+        }
     }
     f.close();
     return true;
-- 
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