text: import { MD4HashBase } from './md4-family/base';
  
  // 20 bytes initial state, add an extra value to MD4/MD5
  const initState = Uint32Array.of(0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0);
  
  // Z constants is used as a index of message buffer
  const zl = [
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
    7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
    3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
    1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
    4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
  ];
  const zr = [
    5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
    6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
    15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
    8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
    12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
  ];
  
  // Y constants is used as a additional term for each 16 rounds
  const yl = [0, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e];
  const yr = [0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0];
  
  // S constants is used as a shift amount of round result
  const sl = [
    11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
    7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
    11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
    11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
    9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
  ];
  const sr = [
    8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
    9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
    9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
    15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
    8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
  ];
  
  /**
   *
   * @param {Uint32Array} state
   * @param {Uint8Array} buffer
   */
  const ripemd160MainLoop = (state, buffer) => {
    // RIPEMD-160 includes a parallel processing rounds
    // which denotes as left rounds and right rounds
    let [al, bl, cl, dl, el] = state;
    let [ar, br, cr, dr, er] = state;
  
    for (let i = 0; i < 80; i += 1) {
      // RIPEMD-160 follows big little mode
      const gl = zl[i];
      const mgl =
        (buffer[gl * 4 + 3] << 24) |
        (buffer[gl * 4 + 2] << 16) |
        (buffer[gl * 4 + 1] << 8) |
        (buffer[gl * 4 + 0] << 0);
  
      const gr = zr[i];
      const mgr =
        (buffer[gr * 4 + 3] << 24) |
        (buffer[gr * 4 + 2] << 16) |
        (buffer[gr * 4 + 1] << 8) |
        (buffer[gr * 4 + 0] << 0);
  
      let tl = 0; let tr = 0;
  
      // the order of primitive manipulation is reversed from left rounds to right rounds
      if (i < 16) {
        tl = bl ^ cl ^ dl;
        tr = br ^ (cr | ~dr);
      } else if (i < 32) {
        tl = (bl & cl) | (~bl & dl);
        tr = (br & dr) | (cr & ~dr);
      } else if (i < 48) {
        tl = (bl | ~cl) ^ dl;
        tr = (br | ~cr) ^ dr;
      } else if (i < 64) {
        tl = (bl & dl) | (cl & ~dl);
        tr = (br & cr) | (~br & dr);
      } else {
        tl = bl ^ (cl | ~dl);
        tr = br ^ cr ^ dr;
      }
  
      const vl = al + tl + mgl + yl[i >>> 4];
      [al, bl, cl, dl, el] = [
        el,
        el + ((vl << sl[i]) | (vl >>> (32 - sl[i]))),
        bl,
        (cl << 10) | (cl >>> (32 - 10)),
        dl,
      ];
  
      const vr = ar + tr + mgr + yr[i >>> 4];
      [ar, br, cr, dr, er] = [
        er,
        er + ((vr << sr[i]) | (vr >>> (32 - sr[i]))),
        br,
        (cr << 10) | (cr >>> (32 - 10)),
        dr,
      ];
    }
  
    const t = state[0];
    state[0] = state[1] + cl + dr;
    state[1] = state[2] + dl + er;
    state[2] = state[3] + el + ar;
    state[3] = state[4] + al + br;
    state[4] = t + bl + cr;
  };
  
  export class RIPEMD160Hash extends MD4HashBase {
    static title = 'ripemd-160';
  
    constructor() {
      super(RIPEMD160Hash, 'RIPEMD-160');
    }
  
    mainLoop() {
      ripemd160MainLoop(this.state, this.buffer);
    }
  
    initState() {
      this.state = new Uint32Array(5);
    }
  
    resetState() {
      initState.forEach((v, i) => { this.state[i] = v; });
    }
  
    exportState() {
      return new Uint8Array(Uint32Array.of(...this.state).buffer);
    }
  
    static hash(data) {
      return new RIPEMD160Hash().hash(data);
    }
  }
  
  export default RIPEMD160Hash;
  