decoder misc.ts

80% Statements 8/10

60% Branches 3/5

100% Functions 2/2

80% Lines 8/10

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  import {TagClass} from '../../../interfaces/TagClass';
 
export function getTagClass(octet: number): TagClass {
  switch (octet >> 6) {
    case 0:
      return TagClass.UNIVERSAL;
    case 1:
      return TagClass.APPLICATION;
    case 2:
      return TagClass.CONTEXT_SPECIFIC;
    case 3:
      return TagClass.PRIVATE;
    default:
      throw new Error('octet should be < 128');
  }
}
 
export function isConstructed(octet: number): boolean {
  return (octet & 0b0010_0000) > 0;
}