Module utils 

Constants

CONTENT_DEDUP_SAMPLE_BYTES

Size (in bytes) of the head/tail samples taken by content_dedup_hash_u64. The full hash spans the file size plus these two samples, so collisions are only possible for files that agree on size and both head + tail windows — adequate for deduping the same .ttc read under different paths without incurring a full-file walk through mmapped pages.

FONT_EXTENSIONS

Known font file extensions (lowercase).

Functions

content_dedup_hash_u64

Deterministic 64-bit “cheap” content hash derived from (file_size, first 4 KiB, last 4 KiB).

content_hash_u64

Deterministic 64-bit content hash over an arbitrary byte slice.

is_font_file

Check if a file has a recognized font extension.

normalize_family_name

Normalize a family/font name for comparison: lowercase, strip all non-alphanumeric characters.