Jpeg.jpeg.scan.ready: def of gralha-jpeg-decode@0.1.0.1
Import: import gralha-jpeg-decode@0.1.0.1/jpeg.bend as Jpeg
Lines 547-551 of gralha-jpeg-decode@0.1.0.1/jpeg.bend: https://jend.leeeet.dev/read.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&start_line=547&end_line=551

import Base
import gralha-bytes@0.1.0.1/bytes.bend as Bin

def jpeg.scan.ready(+xs: List<&2, JPEGComponent>, +start: U32, +end: U32, +high: U32, +quants: List<&2, JPEGQuant>) -> Bool:
  match xs:
    case Nil{}: True{}
    case Con{JPEGComponent{id, h, v, quant, dc, ac, predictor, bw, bh, coefficients, samples}, rest}:
      U32.is_gt(bw, 0) && (U32.is_eq(start, 0) || U32.is_gt(Bin.bytes.get(samples, 0), 0)) && U32.is_le(dc, 3) && U32.is_le(ac, 3) && Bool.not(jpeg.components.has(rest, id)) && jpeg.quant.valid(64n, 0, jpeg.quant.find(quants, quant)) && jpeg.history.valid(U32.to_nat((end - start + 1 : U32)), start, samples, high) && jpeg.scan.ready(rest, start, end, high, quants)

Uses (19):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_gt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=gralha-bytes@0.1.0.1/bytes.bend&name=bytes.get
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=JPEGComponent
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=JPEGQuant
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=jpeg.components.has
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=jpeg.history.valid
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=jpeg.quant.find
  https://jend.leeeet.dev/definition.txt?path=gralha-jpeg-decode@0.1.0.1/jpeg.bend&name=jpeg.quant.valid