From eb35d1adc2cca1c2a9cafd4e57c979378e596abc Mon Sep 17 00:00:00 2001
From: Howard Butler <hobu.inc@gmail.com>
Date: Sun, 20 Jul 2014 20:37:48 -0500
Subject: [PATCH] don't do fancy non-working magic to try to calculate a point
 count for files in append mode #48

---
 src/detail/writer/header.cpp | 25 ++-----------------------
 src/detail/writer/writer.cpp |  4 ++--
 2 files changed, 4 insertions(+), 25 deletions(-)

diff --git a/src/detail/writer/header.cpp b/src/detail/writer/header.cpp
index d7396ef74..db9297124 100644
--- a/src/detail/writer/header.cpp
+++ b/src/detail/writer/header.cpp
@@ -100,35 +100,14 @@ void Header::write()
     // If we are in append mode, we are not touching *any* VLRs. 
     if (bAppendMode) 
     {
-        // We're opened in append mode
-        
-        if (!m_header.Compressed())
-        {
-            ios::off_type points = end - static_cast<ios::off_type>(m_header.GetDataOffset());
-            ios::off_type count = points / static_cast<ios::off_type>(m_header.GetDataRecordLength());
-        
-            if (points < 0) {
-                std::ostringstream oss;
-                oss << "The header's data offset, " << m_header.GetDataOffset() 
-                    <<", is much larger than the size of the file, " << end
-                    <<", and something is amiss.  Did you use the right header"
-                    <<" offset value?";
-                throw std::runtime_error(oss.str());
-            }
-            
-            m_pointCount = static_cast<uint32_t>(count);
-
-        } else {
-            m_pointCount = m_header.GetPointRecordsCount();
-        }
+        // Believe the header
+        m_pointCount = m_header.GetPointRecordsCount();
 
         // Position to the beginning of the file to start writing the header
         m_ofs.seekp(0, ios::beg);
-
     } 
     else 
     {
-        
         // Rewrite the georeference VLR entries if they exist
         m_header.DeleteVLRs("liblas", 2112);
         m_header.SetGeoreference();
diff --git a/src/detail/writer/writer.cpp b/src/detail/writer/writer.cpp
index 441081e5b..686a9cfa6 100644
--- a/src/detail/writer/writer.cpp
+++ b/src/detail/writer/writer.cpp
@@ -77,7 +77,7 @@ void WriterImpl::UpdatePointCount(boost::uint32_t count)
     boost::uint32_t out = m_pointCount;
 
     if ( count != 0 ) { out = count; }
-    
+
     m_header->SetPointRecordsCount(out);
     
     if (!m_ofs.good() ) return;
@@ -102,7 +102,7 @@ WriterImpl::~WriterImpl()
     // care if we weren't able to write it.
     try
     {
-        UpdatePointCount(0);
+        UpdatePointCount(m_pointCount);
         
     } catch (std::runtime_error const&)
     {