Sort of garbage collection commit. :-| Many things are still

broken. API has changed a lot and it will still change a
little more here and there. The command line tool doesn't
have all the required changes to reflect the API changes, so
it's easy to get "internal error" or trigger assertions.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/liblzma/common/delta_encoder.c b/src/liblzma/delta/delta_encoder.c
index a8bb9341..d8f40287 100644
--- a/src/liblzma/common/delta_encoder.c
+++ b/src/liblzma/delta/delta_encoder.c
@@ -96,3 +96,24 @@ lzma_delta_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
 {
 	return lzma_delta_coder_init(next, allocator, filters, &delta_encode);
 }
+
+
+extern lzma_ret
+lzma_delta_props_encode(const void *options, uint8_t *out)
+{
+	if (options == NULL)
+		return LZMA_PROG_ERROR;
+
+	const lzma_options_delta *opt = options;
+
+	// It's possible that newer liblzma versions will support larger
+	// distance values.
+	if (opt->type != LZMA_DELTA_TYPE_BYTE
+			|| opt->distance < LZMA_DELTA_DISTANCE_MIN
+			|| opt->distance > LZMA_DELTA_DISTANCE_MAX)
+		return LZMA_HEADER_ERROR;
+
+	out[0] = opt->distance - LZMA_DELTA_DISTANCE_MIN;
+
+	return LZMA_OK;
+}