API
#hash/crc64ISO/ECMA CRC-64.
const isopub const iso = -2882303761517117440CRC-64 aligned with `hash/crc64` (iso / ecma). Pure i64 arithmetic carrying u64 lanes: arithmetic right shift is masked to logical (`>> 1` with 2^63-1, `>> 8` with 2^56-1). No mutable globals — each make_table owns a 256-entry table. Polynomials that set bit 63 are stored as two's-complement negatives (hex 0x8… literals have historically been lexer-hostile). Value `-2882303761517117440`.
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const ecmapub const ecma = -3932672073523589310Public constant `ecma`. Value `-3932672073523589310`.
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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(crc int, tab &Table, data &string) intupdate; returns int.
crc inttab &Tabledata &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
}Public struct `Digest`.
tab Tablecrc intnew_isopub fn new_iso() DigestConstruct iso.
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Digest — a value of this type
new_ecmapub fn new_ecma() DigestConstruct ecma.
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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_isopub fn checksum_iso(data &string) intChecksum iso.
data &stringint — a value of this type
checksum_ecmapub fn checksum_ecma(data &string) intChecksum ecma.
data &stringint — a value of this type