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MmapBlockIndex

hermes_core::structures

Struct MmapBlockIndex 

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pub struct MmapBlockIndex { /* private fields */ }
Expand description

Mmap’d raw block index (Option 2)

Keeps the prefix-compressed block index as raw bytes and decodes entries on-demand. Uses restart points every R entries for O(log N) lookup via binary search instead of O(N) linear scan.

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impl MmapBlockIndex

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pub fn build(entries: &[(Vec<u8>, BlockAddr)]) -> Result<Vec<u8>>

Build mmap-friendly index from entries.

Format: num_blocks (u32) | BlockAddrStore | prefix-compressed keys (with restart points) | restart_offsets[..] | restart_count (u32) | restart_interval (u16)

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pub fn load(data: OwnedBytes) -> Result<Self>

Load from raw bytes

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pub fn locate(&self, target: &[u8]) -> Option<usize>

O(log(N/R) + R) lookup using binary search on restart points, then linear scan with prefix decompression within the interval.

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pub fn get_addr(&self, ordinal: usize) -> Option<BlockAddr>

Get block address by ordinal

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pub fn len(&self) -> usize

Number of blocks

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pub fn is_empty(&self) -> bool

Check if empty

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pub fn all_addrs(&self) -> Vec<BlockAddr>

Get all block addresses

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pub fn all_keys(&self) -> Vec<Vec<u8>>

Decode all keys (for debugging/merging)

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