<rdar://problem/13069948>

Major fixed to allow reading files that are over 4GB. The main problems were that the DataExtractor was using 32 bit offsets as a data cursor, and since we mmap all of our object files we could run into cases where if we had a very large core file that was over 4GB, we were running into the 4GB boundary.

So I defined a new "lldb::offset_t" which should be used for all file offsets.

After making this change, I enabled warnings for data loss and for enexpected implicit conversions temporarily and found a ton of things that I fixed.

Any functions that take an index internally, should use "size_t" for any indexes and also should return "size_t" for any sizes of collections.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@173463 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Interpreter/CommandObject.cpp b/source/Interpreter/CommandObject.cpp
index 784187f..391b2f2 100644
--- a/source/Interpreter/CommandObject.cpp
+++ b/source/Interpreter/CommandObject.cpp
@@ -351,13 +351,9 @@
         {
             // A NULL or empty string matches everything.
             if (m_match_str == NULL || *m_match_str == '\0')
-                return 1;
+                return true;
 
-            size_t found = map_element.first.find (m_match_str, 0);
-            if (found == std::string::npos)
-                return 0;
-            else
-                return found == 0;
+            return map_element.first.find (m_match_str, 0) == 0;
         }
 
     private: