comparison rust/hg-core/src/revlog/index.rs @ 45591:f38adf8b0711

hg-core: Explain offset override of first revision

(D8958#inline-14992 followup)

Differential Revision: https://phab.mercurial-scm.org/D9095

45590:11f3c3f408fd

        }
        let start = rev as usize * INDEX_ENTRY_SIZE;
        let end = start + INDEX_ENTRY_SIZE;
        let bytes = &self.bytes[start..end];

        // See IndexEntry for an explanation of this override.
        let offset_override = match rev {
            0 => Some(0),
            _ => None,
        };

45591:f38adf8b0711

        }
        let start = rev as usize * INDEX_ENTRY_SIZE;
        let end = start + INDEX_ENTRY_SIZE;
        let bytes = &self.bytes[start..end];

        // Override the offset of the first revision as its bytes are used
        // for the index's metadata (saving space because it is always 0)
        let offset_override = match rev {
            0 => Some(0),
            _ => None,
        };