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Diffstat (limited to '')
| -rw-r--r-- | src/liblzma/delta/delta_encoder.c (renamed from src/liblzma/common/delta_encoder.c) | 21 |
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; +} |