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Implement support for partial flushes #179

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Merged
oyvindln merged 1 commit into from
Jul 20, 2025
Merged

Implement support for partial flushes #179

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7 changes: 7 additions & 0 deletions miniz_oxide/src/deflate/core.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -223,6 +223,9 @@ pub enum TDEFLFlush {
/// Compress as much as there is space for, and then return waiting for more input.
None = 0,

/// Try to flush all the current data and output an empty fixed block.
Partial = 1,

/// Try to flush all the current data and output an empty raw block.
Sync = 2,

Expand All @@ -240,6 +243,7 @@ impl From<MZFlush> for TDEFLFlush {
fn from(flush: MZFlush) -> Self {
match flush {
MZFlush::None => TDEFLFlush::None,
MZFlush::Partial => TDEFLFlush::Partial,
MZFlush::Sync => TDEFLFlush::Sync,
MZFlush::Full => TDEFLFlush::Full,
MZFlush::Finish => TDEFLFlush::Finish,
Expand All @@ -252,6 +256,7 @@ impl TDEFLFlush {
pub const fn new(flush: i32) -> Result<Self, MZError> {
match flush {
0 => Ok(TDEFLFlush::None),
1 => Ok(TDEFLFlush::Partial),
2 => Ok(TDEFLFlush::Sync),
3 => Ok(TDEFLFlush::Full),
4 => Ok(TDEFLFlush::Finish),
Expand Down Expand Up @@ -1692,6 +1697,8 @@ pub(crate) fn flush_block(
adler <<= 8;
}
}
} else if flush == TDEFLFlush::Partial {
output.put_bits(2, 10);
} else {
// Sync or Full flush.
// Output an empty raw block.
Expand Down
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