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-rw-r--r--src/liblzma/simple/simple_coder.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/liblzma/simple/simple_coder.c b/src/liblzma/simple/simple_coder.c
index 6ecd119e..e9674308 100644
--- a/src/liblzma/simple/simple_coder.c
+++ b/src/liblzma/simple/simple_coder.c
@@ -101,6 +101,14 @@ simple_code(lzma_coder *coder, lzma_allocator *allocator,
size_t in_size, uint8_t *restrict out,
size_t *restrict out_pos, size_t out_size, lzma_action action)
{
+ // TODO: Add partial support for LZMA_SYNC_FLUSH. We can support it
+ // in cases when the filter is able to filter everything. With most
+ // simple filters it can be done at offset that is a multiple of 2,
+ // 4, or 16. With x86 filter, it needs good luck, and thus cannot
+ // be made to work predictably.
+ if (action == LZMA_SYNC_FLUSH)
+ return LZMA_HEADER_ERROR;
+
// Flush already filtered data from coder->buffer[] to out[].
if (coder->pos < coder->filtered) {
bufcpy(coder->buffer, &coder->pos, coder->filtered,