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xz: Update a comment and initialization of filters_used_mask 

(cherry picked from commit 46ab56968f)
This commit is contained in:
Lasse Collin 2024-05-12 15:38:48 +03:00
parent 3c130737c9
commit d4e33e7392
1 changed files with 8 additions and 8 deletions
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16
src/xz/coder.c
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@ -41,13 +41,13 @@ static lzma_stream strm = LZMA_STREAM_INIT;
/// the --block-list option.
static lzma_filter filters[NUM_FILTER_CHAIN_MAX][LZMA_FILTERS_MAX + 1];
/// Bit mask representing the filters that are actually used when encoding
/// in the xz format. This is needed since a filter chain could be
/// specified in --filtersX (or the default filter chain), but never used
/// in --block-list. The default filter chain is always assumed to be used,
/// unless --block-list is specified and does not have a block using the
/// default filter chain.
static uint32_t filters_used_mask = 1;
/// Bitmask indicating which filter chains are actually used when encoding
/// in the .xz format. This is needed since the filter chains specified using
/// --filtersX (or the default filter chain) might in reality be unneeded
/// if they are never used in --block-list. When --block-list isn't
/// specified, only the default filter chain is used, thus the initial
/// value of this variable is 1U << 0 (the number of the default chain is 0).
static uint32_t filters_used_mask = 1U << 0;
/// Input and output buffers
static io_buf in_buf;
@ -339,7 +339,7 @@ coder_set_compression_settings(void)
} else {
// Reset filters used mask in case --block-list is not
// used, but --filtersX is used.
filters_used_mask = 1;
filters_used_mask = 1U << 0;
}
#endif
// The default check type is CRC64, but fallback to CRC32