From: Sjoerd Mullender <sjoerd@acm.org>
Date: Fri, 29 Jan 1993 12:01:00 +0000 (+0000)
Subject: added kludge for buggy soundfiler from SGI; when reading 0 frames,
X-Git-Tag: v0.9.9~129
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8d733a00f00c98f5627a977150c85bfa9bed6d28;p=thirdparty%2FPython%2Fcpython.git

added kludge for buggy soundfiler from SGI; when reading 0 frames,
just set file pointer correctly instead of returning the complete
file.
---

diff --git a/Lib/aifc.py b/Lib/aifc.py
index 0849bd735920..706bba824251 100644
--- a/Lib/aifc.py
+++ b/Lib/aifc.py
@@ -379,7 +379,16 @@ class Aifc_read():
 		self._comm_chunk_read = 0
 		while formlength > 0:
 			self._ssnd_seek_needed = 1
-			chunk = Chunk().init(self._file)
+			#DEBUG: SGI's soundfiler has a bug.  There should
+			# be no need to check for EOF here.
+			try:
+				chunk = Chunk().init(self._file)
+			except EOFError:
+				if formlength == 8:
+					print 'Warning: FORM chunk size too large'
+					formlength = 0
+					break
+				raise EOFError # different error, raise exception
 			formlength = formlength - 8 - chunk.chunksize
 			if chunk.chunksize & 1:
 				formlength = formlength - 1
@@ -495,6 +504,8 @@ class Aifc_read():
 			if pos:
 				self._ssnd_chunk.setpos(pos + 8)
 			self._ssnd_seek_needed = 0
+		if nframes == 0:
+			return ''
 		size = nframes * self._nchannels * self._sampwidth
 		if self._decomp:
 			if self._comptype in ('ULAW', 'ALAW'):