API
#hash/crc32IEEE/Castagnoli/Koopman CRC-32.
const ieeepub const ieee = 3988292384CRC-32 aligned with `hash/crc32` (ieee / castagnoli / koopman). Pure i64 arithmetic with 32-bit masks — no mutable globals (each make_table) returns an owning 256-entry table). checksum_ieee uses a precomputed ieee table so small checksums do not rebuild 256 entries from the poly. Value `3988292384`.
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const castagnolipub const castagnoli = 2197175160Public constant `castagnoli`. Value `2197175160`.
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const koopmanpub const koopman = 3945912366Public constant `koopman`. Value `3945912366`.
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struct Tablepub struct Table {
pub entries []int
}Public struct `Table`.
entries []intmake_tablepub fn make_table(poly int) TableMake table.
poly intTable — a value of this type
updatepub fn update(tab &Table, crc int, data &string) intupdate; returns int.
tab &Tablecrc intdata &stringint — a value of this type
checksumpub fn checksum(data &string, tab &Table) intchecksum; returns int.
data &stringtab &Tableint — a value of this type
struct Digestpub struct Digest {
pub tab Table
pub crc int
pub is_ieee bool
}Public struct `Digest`.
tab Tablecrc intis_ieee boolnew_ieeepub fn new_ieee() DigestConstruct ieee.
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Digest — a value of this type
(&mut Digest) writepub fn (d &mut Digest) write(p &string) intMethod on `&mut Digest`: write data and return the byte count.
d &mut Digestp &stringint — bytes written
(&Digest) sumpub fn (d &Digest) sum() intMethod on `&Digest`: compute a digest (often lowercase hex).
d &Digestint — a value of this type
(&Digest) sizepub fn (d &Digest) size() intMethod on `&Digest`: return the size.
d &Digestint — a value of this type
(&mut Digest) resetpub fn (d &mut Digest) reset()Method on `&mut Digest`: clear internal state so the value can be reused.
d &mut Digestchecksum_ieeepub fn checksum_ieee(data &string) intChecksum ieee.
data &stringint — a value of this type
checksum_castagnolipub fn checksum_castagnoli(data &string) intChecksum castagnoli.
data &stringint — a value of this type
checksum_koopmanpub fn checksum_koopman(data &string) intChecksum koopman.
data &stringint — a value of this type