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liblzma: Fix lzma_index_dup() for empty Streams. 

Stream Flags and Stream Padding weren't copied from
empty Streams.
This commit is contained in:
Lasse Collin 2015-10-12 20:45:15 +03:00
parent 06f434bd89
commit e10bfdb0fc
1 changed files with 6 additions and 5 deletions
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11
src/liblzma/common/index.c
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@ -872,11 +872,8 @@ index_dup_stream(const index_stream *src, const lzma_allocator *allocator)
index_stream *dest = index_stream_init(src->node.compressed_base, index_stream *dest = index_stream_init(src->node.compressed_base,
src->node.uncompressed_base, src->number, src->node.uncompressed_base, src->number,
src->block_number_base, allocator); src->block_number_base, allocator);
if (dest == NULL)
// Return immediately if allocation failed or if there are return NULL;
// no groups to duplicate.
if (dest == NULL || src->groups.leftmost == NULL)
return dest;
// Copy the overall information. // Copy the overall information.
dest->record_count = src->record_count; dest->record_count = src->record_count;
@ -884,6 +881,10 @@ index_dup_stream(const index_stream *src, const lzma_allocator *allocator)
dest->stream_flags = src->stream_flags; dest->stream_flags = src->stream_flags;
dest->stream_padding = src->stream_padding; dest->stream_padding = src->stream_padding;
// Return if there are no groups to duplicate.
if (src->groups.leftmost == NULL)
return dest;
// Allocate memory for the Records. We put all the Records into // Allocate memory for the Records. We put all the Records into
// a single group. It's simplest and also tends to make // a single group. It's simplest and also tends to make
// lzma_index_locate() a little bit faster with very big Indexes. // lzma_index_locate() a little bit faster with very big Indexes.