CBitRead::ReadLongLong

/* CBitRead::ReadLongLong() */

ulonglong __thiscall CBitRead::ReadLongLong(CBitRead *this)

{
  int iVar1;
  uint *puVar2;
  undefined4 uVar3;
  uint uVar4;
  uint *puVar5;
  int iVar6;
  uint uVar7;
  uint *puVar8;
  uint local_28;
  uint local_1c;
  
  iVar6 = *(int *)(this + 0x14);
  if (iVar6 < 0x20) {
    local_1c = *(uint *)(this + 0x10);
    puVar2 = *(uint **)(this + 0x18);
    puVar8 = *(uint **)(this + 0x1c);
    if (puVar2 == puVar8) {
      puVar5 = puVar2 + 1;
      *(undefined4 *)(this + 0x14) = 1;
      iVar6 = 1;
      *(undefined4 *)(this + 0x10) = 0;
      *(uint **)(this + 0x18) = puVar5;
      this[4] = (CBitRead)0x1;
    }
    else {
      if (puVar2 <= puVar8) {
        puVar5 = puVar2 + 1;
        *(uint **)(this + 0x18) = puVar5;
        uVar7 = *puVar2;
        *(uint *)(this + 0x10) = uVar7;
        if (this[4] == (CBitRead)0x0) {
          *(int *)(this + 0x14) = iVar6;
          local_28._0_1_ = (byte)(0x20 - iVar6);
          local_1c = (uVar7 & (&CBitBuffer::s_nMaskTable)[0x20 - iVar6]) << ((byte)iVar6 & 0x1f) |
                     local_1c;
          local_28 = uVar7 >> ((byte)local_28 & 0x1f);
          *(uint *)(this + 0x10) = local_28;
        }
        else {
          local_1c = 0;
          local_28 = uVar7;
        }
        goto LAB_00257ac9;
      }
      this[4] = (CBitRead)0x1;
      *(undefined4 *)(this + 0x10) = 0;
      puVar5 = puVar2;
    }
    local_28 = 0;
    local_1c = 0;
LAB_00257ac9:
    if (puVar5 == puVar8) {
      *(undefined4 *)(this + 0x14) = 1;
      *(undefined4 *)(this + 0x10) = 0;
      *(uint **)(this + 0x18) = puVar5 + 1;
      this[4] = (CBitRead)0x1;
    }
    else if (puVar8 < puVar5) {
      this[4] = (CBitRead)0x1;
      *(undefined4 *)(this + 0x10) = 0;
    }
    else {
      *(uint **)(this + 0x18) = puVar5 + 1;
      uVar7 = *puVar5;
      *(uint *)(this + 0x10) = uVar7;
      if (this[4] == (CBitRead)0x0) {
        uVar3 = *(undefined4 *)(this + 0x14);
        *(int *)(this + 0x14) = iVar6;
        uVar4 = (&CBitBuffer::s_nMaskTable)[0x20 - iVar6];
        *(uint *)(this + 0x10) = uVar7 >> ((byte)(0x20 - iVar6) & 0x1f);
        return CONCAT44((uVar7 & uVar4) << ((byte)uVar3 & 0x1f) | local_28,local_1c);
      }
    }
    uVar7 = 0;
  }
  else {
    iVar1 = iVar6 + -0x20;
    local_1c = *(uint *)(this + 0x10);
    *(int *)(this + 0x14) = iVar1;
    if (iVar1 == 0) {
      puVar5 = *(uint **)(this + 0x18);
      *(undefined4 *)(this + 0x14) = 0x20;
      puVar8 = *(uint **)(this + 0x1c);
      if (puVar5 == puVar8) {
        puVar5 = puVar5 + 1;
        *(undefined4 *)(this + 0x14) = 1;
        iVar6 = 1;
        *(undefined4 *)(this + 0x10) = 0;
        *(uint **)(this + 0x18) = puVar5;
        local_28 = 0;
        goto LAB_00257ac9;
      }
      if (puVar5 < puVar8) {
        *(uint **)(this + 0x18) = puVar5 + 1;
        uVar7 = *puVar5;
        *(uint *)(this + 0x10) = uVar7;
        puVar5 = puVar5 + 1;
      }
      else {
        this[4] = (CBitRead)0x1;
        uVar7 = 0;
        *(undefined4 *)(this + 0x10) = 0;
      }
    }
    else {
      *(undefined4 *)(this + 0x10) = 0;
      if (iVar1 < 0x20) {
        local_28 = 0;
        puVar5 = *(uint **)(this + 0x18);
        puVar8 = *(uint **)(this + 0x1c);
        iVar6 = iVar1;
        goto LAB_00257ac9;
      }
      *(int *)(this + 0x14) = iVar6 + -0x40;
      if (iVar6 + -0x40 != 0) {
        *(undefined4 *)(this + 0x10) = 0;
        return (ulonglong)local_1c;
      }
      uVar7 = 0;
      puVar8 = *(uint **)(this + 0x1c);
      puVar5 = *(uint **)(this + 0x18);
    }
    *(undefined4 *)(this + 0x14) = 0x20;
    if (puVar5 != puVar8) {
      if (puVar5 <= puVar8) {
        *(uint **)(this + 0x18) = puVar5 + 1;
        *(uint *)(this + 0x10) = *puVar5;
        return CONCAT44(uVar7,local_1c);
      }
      this[4] = (CBitRead)0x1;
      *(undefined4 *)(this + 0x10) = 0;
      return CONCAT44(uVar7,local_1c);
    }
    *(undefined4 *)(this + 0x14) = 1;
    *(undefined4 *)(this + 0x10) = 0;
    *(uint **)(this + 0x18) = puVar5 + 1;
  }
  return CONCAT44(uVar7,local_1c);
}