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added cleanup to free dictionary memory in ZipEncode, fixes old comment about leaking memory from prior to when we had the cleanup mechanisim

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This commit is contained in:
wiredfool 2016-04-15 08:48:57 -07:00
parent 4b4ef5f1e2
commit 49566b287e
3 changed files with 22 additions and 3 deletions
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6
encode.c
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@ -483,9 +483,7 @@ PyImaging_ZipEncoderNew(PyObject* self, PyObject* args)
&dictionary, &dictionary_size))
return NULL;
/* Copy to avoid referencing Python's memory, but there's no mechanism to
free this memory later, so this function (and several others here)
leaks. */
/* Copy to avoid referencing Python's memory */
if (dictionary && dictionary_size > 0) {
/* malloc check ok, size comes from PyArg_ParseTuple */
char* p = malloc(dictionary_size);
@ -504,6 +502,7 @@ PyImaging_ZipEncoderNew(PyObject* self, PyObject* args)
return NULL;
encoder->encode = ImagingZipEncode;
encoder->cleanup = ImagingZipEncodeCleanup;
if (rawmode[0] == 'P')
/* disable filtering */
@ -638,6 +637,7 @@ PyImaging_JpegEncoderNew(PyObject* self, PyObject* args)
if (get_packer(encoder, mode, rawmode) < 0)
return NULL;
// Freed in JpegEncode, Case 5
qarrays = get_qtables_arrays(qtables, &qtablesLen);
if (extra && extra_size > 0) {

1
libImaging/Imaging.h
View File

@ -474,6 +474,7 @@ extern int ImagingZipDecode(Imaging im, ImagingCodecState state,
UINT8* buffer, int bytes);
extern int ImagingZipEncode(Imaging im, ImagingCodecState state,
UINT8* buffer, int bytes);
extern int ImagingZipEncodeCleanup(ImagingCodecState state);
#endif
typedef void (*ImagingShuffler)(UINT8* out, const UINT8* in, int pixels);

18
libImaging/ZipEncode.c
View File

@ -348,6 +348,24 @@ ImagingZipEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
return -1;
}
/* -------------------------------------------------------------------- */
/* Cleanup */
/* -------------------------------------------------------------------- */
int
ImagingZipEncodeCleanup(ImagingCodecState state) {
ZIPSTATE* context = (ZIPSTATE*) state->context;
if (context->dictionary) {
free (context->dictionary);
context->dictionary = NULL;
}
return -1;
}
const char*
ImagingZipVersion(void)
{