Mcfg.AcpiMcfg.of_sdt: def of bend-osdev-acpi@0.1.1.0
Import: import bend-osdev-acpi@0.1.1.0/mcfg.bend as Mcfg
Lines 45-51 of bend-osdev-acpi@0.1.1.0/mcfg.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-acpi@0.1.1.0/mcfg.bend&start_line=45&end_line=51

import Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B
import bend-osdev-acpi@0.1.1.0/error.bend as E
import bend-osdev-acpi@0.1.1.0/header.bend as H

# a checked table as an MCFG: the body is 8 reserved bytes and a whole
# number of 16-byte structures (AcpiBadSize otherwise)
def AcpiMcfg.of_sdt(t: H.AcpiSdt) -> Result<&2, &2, E.AcpiError, AcpiMcfg>:
  match t:
    case H.AcpiSdt{h, +body}:
      +n = B.Octets.len(body)
      mcfg.body(Bool.and(Nat.is_le(8n, n), Nat.is_eq(Nat.mod(Nat.sub(n, 8n), 16n), 0n)), h, body)

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mod
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-acpi@0.1.1.0/error.bend&name=AcpiError
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-acpi@0.1.1.0/header.bend&name=AcpiSdt
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-acpi@0.1.1.0/mcfg.bend&name=AcpiMcfg
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-acpi@0.1.1.0/mcfg.bend&name=mcfg.body
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.len