diff options
Diffstat (limited to 'src/liblzma/common/common.c')
| -rw-r--r-- | src/liblzma/common/common.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/liblzma/common/common.c b/src/liblzma/common/common.c index 3bdf3252..edce90cd 100644 --- a/src/liblzma/common/common.c +++ b/src/liblzma/common/common.c @@ -92,12 +92,30 @@ lzma_next_filter_init(lzma_next_coder *next, lzma_allocator *allocator, const lzma_filter_info *filters) { lzma_next_coder_init(filters[0].init, next, allocator); - + next->id = filters[0].id; return filters[0].init == NULL ? LZMA_OK : filters[0].init(next, allocator, filters); } +extern lzma_ret +lzma_next_filter_update(lzma_next_coder *next, lzma_allocator *allocator, + const lzma_filter *reversed_filters) +{ + // Check that the application isn't trying to change the Filter ID. + // End of filters is indicated with LZMA_VLI_UNKNOWN in both + // reversed_filters[0].id and next->id. + if (reversed_filters[0].id != next->id) + return LZMA_PROG_ERROR; + + if (reversed_filters[0].id == LZMA_VLI_UNKNOWN) + return LZMA_OK; + + assert(next->update != NULL); + return next->update(next->coder, allocator, NULL, reversed_filters); +} + + extern void lzma_next_end(lzma_next_coder *next, lzma_allocator *allocator) { |