BUG: .gz files don't report the right correct length. Thanks to Brandon Craig Rhodes for the fix.

git-svn-id: https://svn.enthought.com/svn/sandbox/grin/trunk@78 b5260ef8-a2c4-4e91-82fd-f242746c304a

Author: rkern

grin.py

@@ -304,14 +304,17 @@ def do_grep(self, fp):
         """
         context = []
         line_count = 0
-        try:
-            status = os.fstat(fp.fileno())
-            if stat.S_ISREG(status.st_mode):
-                fp_size = status.st_size
-            else:
+        if isinstance(fp, gzip.GzipFile):
+            fp_size = None  # gzipped data is usually longer than the file
+        else:
+            try:
+                status = os.fstat(fp.fileno())
+                if stat.S_ISREG(status.st_mode):
+                    fp_size = status.st_size
+                else:
+                    fp_size = None
+            except AttributeError:  # doesn't support fileno()
                 fp_size = None
-        except AttributeError:  # doesn't support fileno()
-            fp_size = None
 
         block = self.read_block_with_context(None, fp, fp_size)
         while block.end > block.start: