From: W. Trevor King <wking@tremily.us>
Date: Tue, 17 Jul 2012 12:59:17 +0000 (-0400)
Subject: Move need_to_reorder_bytes from binarywave to util.
X-Git-Tag: v0.2~37
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=f80fadab6d17098793f14f443d0a88aab648ebf8;p=igor.git

Move need_to_reorder_bytes from binarywave to util.

We'll be needing it for packed.load, so it's not binarywave-specific.
---

diff --git a/igor/binarywave.py b/igor/binarywave.py
index 70af310..f9c4e18 100644
--- a/igor/binarywave.py
+++ b/igor/binarywave.py
@@ -36,6 +36,7 @@ from .struct import Structure as _Structure
 from .struct import Field as _Field
 from .util import assert_null as _assert_null
 from .util import byte_order as _byte_order
+from .util import need_to_reorder_bytes as _need_to_reorder_bytes
 from .util import checksum as _checksum
 
 
@@ -226,15 +227,6 @@ WaveHeader5 = _Structure(
 
 # End IGOR constants and typedefs from IgorBin.h
 
-# Begin functions from ReadWave.c
-
-def _need_to_reorder_bytes(version):
-    # If the low order byte of the version field of the BinHeader
-    # structure is zero then the file is from a platform that uses
-    # different byte-ordering and therefore all data will need to be
-    # reordered.
-    return version & 0xFF == 0
-
 def _version_structs(version, byte_order):
     if version == 1:
         bin = BinHeader1
@@ -271,7 +263,7 @@ def load(filename, strict=True):
         version = BinHeaderCommon.unpack_dict_from(b)['version']
         needToReorderBytes = _need_to_reorder_bytes(version)
         byteOrder = _byte_order(needToReorderBytes)
-        
+
         if needToReorderBytes:
             BinHeaderCommon.set_byte_order(byteOrder)
             version = BinHeaderCommon.unpack_dict_from(b)['version']
diff --git a/igor/util.py b/igor/util.py
index 55c015c..c263cd1 100644
--- a/igor/util.py
+++ b/igor/util.py
@@ -63,6 +63,14 @@ def byte_order(needToReorderBytes):
         return '<'  # little-endian
     return '>'  # big-endian    
 
+# From ReadWave.c
+def need_to_reorder_bytes(version):
+    # If the low order byte of the version field of the BinHeader
+    # structure is zero then the file is from a platform that uses
+    # different byte-ordering and therefore all data will need to be
+    # reordered.
+    return version & 0xFF == 0
+
 # From ReadWave.c
 def checksum(buffer, byte_order, oldcksum, numbytes):
     x = _numpy.ndarray(