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Merged
pull merged 1 commit into from
Jun 24, 2026
Merged

[pull] main from VirusTotal:main #252

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11 changes: 11 additions & 0 deletions lib/src/compiler/rules.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,17 @@ pub struct Rules {
pub(in crate::compiler) filesize_bounds:
FxHashMap<PatternId, FilesizeBounds>,

/// Map that associates a `PatternId` to a certain constraint on the
/// file header (e.g. magic bytes at offset 0), if any.
///
/// A condition like `uint16(0) == 0x5A4D and $a` or `$mz at 0 and $a`
/// (where $mz = "MZ") only matches if the file starts with "MZ" (0x5A4D).
/// In this case, the map will contain an entry associating `$a` to a
/// `HeaderConstraint` that requires the file to start with those two
/// bytes.
///
/// This allows skipping pattern checks entirely if the scanned data
/// doesn't start with the expected header prefix.
pub(in crate::compiler) header_constraints:
FxHashMap<PatternId, HeaderConstraint>,

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