From 0c241d2988705a7b77ee23410f1ac032767ae791 Mon Sep 17 00:00:00 2001
From: Michael Cahill <michael.cahill@mongodb.com>
Date: Wed, 20 Jan 2016 14:54:25 +1100
Subject: WT-1517 Set the packing size = 1 by default in the fast path.

Don't add extra checks into regular processing: we already set size = 1
in normal processing of packing strings if no size is specified.  Make
the Python packing code match so all test cases pass.
---
 lang/python/wiredtiger/packing.py | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

(limited to 'lang')

diff --git a/lang/python/wiredtiger/packing.py b/lang/python/wiredtiger/packing.py
index 2012263e258..5d21b539888 100644
--- a/lang/python/wiredtiger/packing.py
+++ b/lang/python/wiredtiger/packing.py
@@ -70,6 +70,8 @@ def __unpack_iter_fmt(fmt):
             size = (size * 10) + int(char)
             havesize = 1
         else:
+            if not havesize:
+                size = 1
             yield offset, havesize, size, char
             size = 0
             havesize = 0
@@ -83,14 +85,12 @@ def unpack(fmt, s):
     result = []
     for offset, havesize, size, f in __unpack_iter_fmt(fmt):
         if f == 'x':
-            if not havesize:
-                size = 1
             s = s[size:]
             # Note: no value, don't increment i
         elif f in 'SsUu':
             if not havesize:
                 if f == 's':
-                    size = 1
+                    pass
                 elif f == 'S':
                     size = s.find('\0')
                 elif f == 'u' and offset == len(fmt) - 1:
@@ -106,14 +106,10 @@ def unpack(fmt, s):
             s = s[size:]
         elif f in 't':
             # bit type, size is number of bits
-            if not havesize:
-                size = 1
             result.append(ord(s[0:1]))
             s = s[1:]
         elif f in 'Bb':
             # byte type
-            if not havesize:
-                size = 1
             for i in xrange(size):
                 v = ord(s[0:1])
                 if f != 'B':
@@ -122,8 +118,6 @@ def unpack(fmt, s):
                 s = s[1:]
         else:
             # integral type
-            if not havesize:
-                size = 1
             for j in xrange(size):
                 v, s = unpack_int(s)
                 result.append(v)
@@ -164,11 +158,9 @@ def pack(fmt, *values):
                 l = val.find('\0')
             else:
                 l = len(val)
-            if havesize:
+            if havesize or f == 's':
                 if l > size:
                     l = size
-            elif f == 's':
-                havesize = size = 1
             elif (f == 'u' and offset != len(fmt) - 1) or f == 'U':
                 result += pack_int(l)
             if type(val) is unicode and f in 'Ss':
-- 
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