diff options
| -rw-r--r-- | src/liblzma/common/common.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/src/liblzma/common/common.c b/src/liblzma/common/common.c index dc43fadd..92308fe4 100644 --- a/src/liblzma/common/common.c +++ b/src/liblzma/common/common.c @@ -192,34 +192,26 @@ lzma_code(lzma_stream *strm, lzma_action action) break; case ISEQ_SYNC_FLUSH: - if (action != LZMA_SYNC_FLUSH) + // The same action must be used until we return + // LZMA_STREAM_END, and the amount of input must not change. + if (action != LZMA_SYNC_FLUSH + || strm->internal->avail_in != strm->avail_in) return LZMA_PROG_ERROR; - // Check that application doesn't change avail_in once - // LZMA_SYNC_FLUSH has been used. - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - break; case ISEQ_FULL_FLUSH: - if (action != LZMA_FULL_FLUSH) + if (action != LZMA_FULL_FLUSH + || strm->internal->avail_in != strm->avail_in) return LZMA_PROG_ERROR; - // Check that application doesn't change avail_in once - // LZMA_FULL_FLUSH has been used. - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - break; case ISEQ_FINISH: - if (action != LZMA_FINISH) + if (action != LZMA_FINISH + || strm->internal->avail_in != strm->avail_in) return LZMA_PROG_ERROR; - if (strm->internal->avail_in != strm->avail_in) - return LZMA_DATA_ERROR; - break; case ISEQ_END: |