From c0f2ee61eee94395c7cf925baf5ac8ed44abecee Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <mosu@jysella.(none)>
Date: Thu, 30 Apr 2009 19:34:47 +0200
Subject: [PATCH] Throw an exception if seeking to invalid positions is
 requested in the memory IO class.

---
 src/common/mm_io.cpp | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/common/mm_io.cpp b/src/common/mm_io.cpp
index 621e7b1ca..2c0a394a8 100644
--- a/src/common/mm_io.cpp
+++ b/src/common/mm_io.cpp
@@ -980,12 +980,10 @@ mm_mem_io_c::setFilePointer(int64 offset,
   else
     npos = pos + offset;
 
-  if (npos < 0)
-    pos = 0;
-  else if (npos >= mem_size)
-    pos = mem_size;
-  else
+  if ((0 <= npos) && (mem_size >= npos))
     pos = npos;
+  else
+    throw mm_io_seek_error_c();
 }
 
 uint32