All files / src/shared/lib/helpers 8bit.ts

100% Statements 75/75
100% Branches 4/4
100% Functions 22/22
100% Lines 43/43

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 6776x 76x   6410347x 76x   76x 16x 16x     76x 11x 76x 18x   76x 8x   76x 9x   76x 8x   76x 9x   76x 9x   76x 10x   76x 101x   538x   76x   76x   76x 11x 11x 8x   3x       76x   76x 8x 8x 8x 8x     76x 76x   76x 76x  
export const SIGNED_16BIT_MAX = 32767;
export const SIGNED_16BIT_MIN = -32768;
 
export const wrap8Bit = (val: number) => (256 + (val % 256)) % 256;
export const wrap16Bit = (val: number) => (65536 + (val % 65536)) % 65536;
 
export const wrapSigned8Bit = (val: number) => {
  const u = wrap8Bit(val);
  return u >= 128 ? u - 256 : u;
};
 
export const clampSigned16Bit = (val: number) =>
  Math.max(SIGNED_16BIT_MIN, Math.min(SIGNED_16BIT_MAX, val));
export const wrap32Bit = (val: number) =>
  (4294967296 + (val % 4294967296)) % 4294967296;
 
export const decBin = (dec: number) =>
  wrap8Bit(dec).toString(2).padStart(8, "0");
 
export const decHex = (dec: number) =>
  `0x${wrap8Bit(dec).toString(16).padStart(2, "0").toUpperCase()}`;
 
export const decHexVal = (dec: number) =>
  wrap8Bit(dec).toString(16).padStart(2, "0").toUpperCase();
 
export const decHex16 = (dec: number) =>
  `0x${wrap16Bit(dec).toString(16).padStart(4, "0").toUpperCase()}`;
 
export const decHex16Val = (dec: number) =>
  wrap16Bit(dec).toString(16).padStart(4, "0").toUpperCase();
 
export const decHex32Val = (dec: number) =>
  wrap32Bit(dec).toString(16).padStart(8, "0").toUpperCase();
 
export const decOct = (dec: number) =>
  wrap8Bit(dec).toString(8).padStart(3, "0");
 
export const hexDec = (hex: string) => parseInt(hex, 16);
 
export const hi = (longNum: number) => wrap16Bit(longNum) >> 8;
 
export const lo = (longNum: number) => wrap16Bit(longNum) % 256;
 
export const fromSigned8Bit = (num: number): number => {
  const masked = num & 0xff;
  if (masked & 0x80) {
    return masked - 0x100;
  } else {
    return masked;
  }
};
 
export const divisibleBy8 = (n: number) => (n >> 3) << 3 === n;
 
export const convertHexTo15BitDec = (hex: string) => {
  const r = Math.floor(hexDec(hex.substring(0, 2)) * (32 / 256));
  const g = Math.floor(hexDec(hex.substring(2, 4)) * (32 / 256));
  const b = Math.max(1, Math.floor(hexDec(hex.substring(4, 6)) * (32 / 256)));
  return (b << 10) + (g << 5) + r;
};
 
export const roundDown8 = (v: number): number => 8 * Math.floor(v / 8);
export const roundDown16 = (v: number): number => 16 * Math.floor(v / 16);
 
export const roundUp16 = (x: number): number => Math.ceil(x / 16) * 16;
export const roundUp8 = (x: number): number => Math.ceil(x / 8) * 8;