Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
diff --git a/Lib/wave.py b/Lib/wave.py
index 04a1a6d..d6eef78 100644
--- a/Lib/wave.py
+++ b/Lib/wave.py
@@ -80,7 +80,7 @@
WAVE_FORMAT_PCM = 0x0001
-_array_fmts = None, 'b', 'h', None, 'l'
+_array_fmts = None, 'b', 'h', None, 'i'
# Determine endian-ness
import struct
@@ -238,6 +238,7 @@
import array
chunk = self._data_chunk
data = array.array(_array_fmts[self._sampwidth])
+ assert data.itemsize == self._sampwidth
nitems = nframes * self._nchannels
if nitems * self._sampwidth > chunk.chunksize - chunk.size_read:
nitems = (chunk.chunksize - chunk.size_read) / self._sampwidth
@@ -421,6 +422,7 @@
if self._sampwidth > 1 and big_endian:
import array
data = array.array(_array_fmts[self._sampwidth], data)
+ assert data.itemsize == self._sampwidth
data.byteswap()
data.tofile(self._file)
self._datawritten = self._datawritten + len(data) * self._sampwidth
diff --git a/Misc/NEWS b/Misc/NEWS
index 6e4b7fb..8af9753 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -35,6 +35,8 @@
Library
-------
+- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
+
- Issue #18458: Prevent crashes with newer versions of libedit. Its readline
emulation has changed from 0-based indexing to 1-based like gnu readline.
Original patch by Ronald Oussoren.