old_bf_read::ReadUBitVar

/* WARNING: Globals starting with '_' overlap smaller symbols at the same address */
/* old_bf_read::ReadUBitVar() */

uint __thiscall old_bf_read::ReadUBitVar(old_bf_read *this)

{
  int iVar1;
  int iVar2;
  int iVar3;
  int iVar4;
  uint uVar5;
  byte bVar6;
  uint uVar7;
  uint local_1c;
  
  iVar1 = *(int *)(this + 0xc);
  iVar2 = *(int *)(this + 8);
  uVar5 = iVar1 + 6;
  if (iVar2 < (int)uVar5) {
    *(int *)(this + 0xc) = iVar2;
    this[0x10] = (old_bf_read)0x1;
    return 0;
  }
  iVar3 = *(int *)this;
  iVar4 = iVar1 >> 5;
  local_1c = *(uint *)(iVar3 + iVar4 * 4) >> ((byte)iVar1 & 0x1f);
  *(uint *)(this + 0xc) = uVar5;
  if (iVar4 == iVar1 + 5 >> 5) {
    local_1c = local_1c & _DAT_003f2d38;
  }
  else {
    local_1c = (*(uint *)(iVar3 + 4 + iVar4 * 4) & (&g_ExtraMasks)[uVar5 & 0x1f]) <<
               (6U - (char)(uVar5 & 0x1f) & 0x1f) | local_1c;
  }
  uVar7 = local_1c & 0x30;
  iVar4 = (int)uVar5 >> 5;
  bVar6 = (byte)uVar5;
  if (uVar7 == 0x20) {
    uVar5 = iVar1 + 0xe;
    if ((int)uVar5 <= iVar2) {
      uVar7 = *(uint *)(iVar3 + iVar4 * 4);
      *(uint *)(this + 0xc) = uVar5;
      uVar7 = uVar7 >> (bVar6 & 0x1f);
      if (iVar4 == iVar1 + 0xd >> 5) {
        uVar5 = (DAT_003f2d40 & uVar7) << 4;
      }
      else {
        uVar5 = ((*(uint *)(iVar3 + 4 + iVar4 * 4) & (&g_ExtraMasks)[uVar5 & 0x1f]) <<
                 (8U - (char)(uVar5 & 0x1f) & 0x1f) | uVar7) << 4;
      }
      goto LAB_002434fa;
    }
  }
  else if (uVar7 == 0x30) {
    uVar5 = iVar1 + 0x22;
    if ((int)uVar5 <= iVar2) {
      uVar7 = *(uint *)(iVar3 + iVar4 * 4);
      *(uint *)(this + 0xc) = uVar5;
      uVar7 = uVar7 >> (bVar6 & 0x1f);
      if (iVar4 == iVar1 + 0x21 >> 5) {
        uVar5 = (_DAT_003f2d90 & uVar7) << 4;
      }
      else {
        uVar5 = ((*(uint *)(iVar3 + 4 + iVar4 * 4) & (&g_ExtraMasks)[uVar5 & 0x1f]) <<
                 (0x1cU - (char)(uVar5 & 0x1f) & 0x1f) | uVar7) << 4;
      }
      goto LAB_002434fa;
    }
  }
  else {
    if (uVar7 != 0x10) {
      return local_1c;
    }
    uVar5 = iVar1 + 10;
    if ((int)uVar5 <= iVar2) {
      uVar7 = *(uint *)(iVar3 + iVar4 * 4);
      *(uint *)(this + 0xc) = uVar5;
      uVar7 = uVar7 >> (bVar6 & 0x1f);
      if (iVar4 != iVar1 + 9 >> 5) {
        return ((*(uint *)(iVar3 + 4 + iVar4 * 4) & (&g_ExtraMasks)[uVar5 & 0x1f]) <<
                (4U - (char)(uVar5 & 0x1f) & 0x1f) | uVar7) << 4 | local_1c & 0xf;
      }
      uVar5 = (_DAT_003f2d30 & uVar7) << 4;
      goto LAB_002434fa;
    }
  }
  *(int *)(this + 0xc) = iVar2;
  uVar5 = 0;
  this[0x10] = (old_bf_read)0x1;
LAB_002434fa:
  local_1c = local_1c & 0xf;
  return uVar5 | local_1c;
}