CBitWrite::WriteBitsFromBuffer

/* CBitWrite::WriteBitsFromBuffer(bf_read*, int) */

byte __thiscall CBitWrite::WriteBitsFromBuffer(CBitWrite *this,bf_read *param_1,int param_2)

{
  uint uVar1;
  uint *puVar2;
  undefined4 *puVar3;
  byte bVar4;
  int iVar5;
  int iVar6;
  CBitWrite CVar7;
  uint uVar8;
  int local_18;
  uint local_14;
  
  if (0x20 < param_2) {
    local_18 = param_2;
    do {
      while( true ) {
        iVar5 = *(int *)(param_1 + 0x14);
        uVar8 = *(uint *)(param_1 + 0x10);
        if (iVar5 < 0x20) break;
        *(int *)(param_1 + 0x14) = iVar5 + -0x20;
        if (iVar5 + -0x20 == 0) {
          puVar3 = *(undefined4 **)(param_1 + 0x18);
          *(undefined4 *)(param_1 + 0x14) = 0x20;
          if (puVar3 == *(undefined4 **)(param_1 + 0x1c)) {
            *(undefined4 *)(param_1 + 0x14) = 1;
            *(undefined4 *)(param_1 + 0x10) = 0;
            *(undefined4 **)(param_1 + 0x18) = puVar3 + 1;
          }
          else {
            if (*(undefined4 **)(param_1 + 0x1c) < puVar3) {
              param_1[4] = (bf_read)0x1;
              goto LAB_0025700f;
            }
            *(undefined4 **)(param_1 + 0x18) = puVar3 + 1;
            *(undefined4 *)(param_1 + 0x10) = *puVar3;
          }
        }
        else {
LAB_0025700f:
          *(undefined4 *)(param_1 + 0x10) = 0;
        }
LAB_00257016:
        iVar5 = *(int *)(this + 0x14);
        if (0x1f < iVar5) goto LAB_00257022;
LAB_002570aa:
        puVar2 = *(uint **)(this + 0x18);
        uVar1 = ((&CBitBuffer::s_nMaskTable)[iVar5] & uVar8) << (0x20 - (byte)iVar5 & 0x1f) |
                *(uint *)(this + 0x10);
        *(uint *)(this + 0x10) = uVar1;
        if (puVar2 == *(uint **)(this + 0x1c)) {
          this[4] = (CBitWrite)0x1;
        }
        else {
          *(uint **)(this + 0x18) = puVar2 + 1;
          *puVar2 = uVar1;
        }
        local_18 = local_18 + -0x20;
        *(int *)(this + 0x14) = iVar5;
        *(uint *)(this + 0x10) = uVar8 >> ((byte)iVar5 & 0x1f);
        if (local_18 < 0x21) goto LAB_002570fb;
      }
      puVar2 = *(uint **)(param_1 + 0x18);
      if (puVar2 == *(uint **)(param_1 + 0x1c)) {
        *(undefined4 *)(param_1 + 0x14) = 1;
        *(undefined4 *)(param_1 + 0x10) = 0;
        *(uint **)(param_1 + 0x18) = puVar2 + 1;
        param_1[4] = (bf_read)0x1;
      }
      else if (*(uint **)(param_1 + 0x1c) < puVar2) {
        param_1[4] = (bf_read)0x1;
        *(undefined4 *)(param_1 + 0x10) = 0;
      }
      else {
        *(uint **)(param_1 + 0x18) = puVar2 + 1;
        uVar1 = *puVar2;
        *(uint *)(param_1 + 0x10) = uVar1;
        if (param_1[4] == (bf_read)0x0) {
          *(int *)(param_1 + 0x14) = iVar5;
          uVar8 = ((&CBitBuffer::s_nMaskTable)[0x20 - iVar5] & uVar1) << ((byte)iVar5 & 0x1f) |
                  uVar8;
          *(uint *)(param_1 + 0x10) = uVar1 >> ((byte)(0x20 - iVar5) & 0x1f);
          goto LAB_00257016;
        }
      }
      uVar8 = 0;
      iVar5 = *(int *)(this + 0x14);
      if (iVar5 < 0x20) goto LAB_002570aa;
LAB_00257022:
      *(int *)(this + 0x14) = iVar5 + -0x20;
      uVar8 = *(uint *)(this + 0x10) | uVar8 << (0x20U - (char)iVar5 & 0x1f);
      *(uint *)(this + 0x10) = uVar8;
      if (iVar5 + -0x20 == 0) {
        puVar2 = *(uint **)(this + 0x18);
        if (puVar2 == *(uint **)(this + 0x1c)) {
          this[4] = (CBitWrite)0x1;
        }
        else {
          *(uint **)(this + 0x18) = puVar2 + 1;
          *puVar2 = uVar8;
        }
        *(undefined4 *)(this + 0x10) = 0;
        *(undefined4 *)(this + 0x14) = 0x20;
      }
      local_18 = local_18 + -0x20;
    } while (0x20 < local_18);
LAB_002570fb:
    param_2 = (param_2 + -0x20) - (param_2 - 0x21U & 0xffffffe0);
  }
  iVar5 = *(int *)(param_1 + 0x14);
  if (iVar5 < param_2) {
    puVar2 = *(uint **)(param_1 + 0x18);
    local_14 = *(uint *)(param_1 + 0x10);
    if (puVar2 == *(uint **)(param_1 + 0x1c)) {
      *(undefined4 *)(param_1 + 0x14) = 1;
      *(undefined4 *)(param_1 + 0x10) = 0;
      *(uint **)(param_1 + 0x18) = puVar2 + 1;
      param_1[4] = (bf_read)0x1;
    }
    else if (*(uint **)(param_1 + 0x1c) < puVar2) {
      param_1[4] = (bf_read)0x1;
      *(undefined4 *)(param_1 + 0x10) = 0;
    }
    else {
      *(uint **)(param_1 + 0x18) = puVar2 + 1;
      uVar8 = *puVar2;
      *(uint *)(param_1 + 0x10) = uVar8;
      if (param_1[4] == (bf_read)0x0) {
        iVar6 = param_2 - iVar5;
        uVar1 = (&CBitBuffer::s_nMaskTable)[iVar6];
        *(int *)(param_1 + 0x14) = 0x20 - iVar6;
        local_14 = (uVar1 & uVar8) << ((byte)iVar5 & 0x1f) | local_14;
        *(uint *)(param_1 + 0x10) = uVar8 >> ((byte)iVar6 & 0x1f);
        goto LAB_0025728a;
      }
    }
    local_14 = 0;
  }
  else {
    local_14 = (&CBitBuffer::s_nMaskTable)[param_2];
    *(int *)(param_1 + 0x14) = iVar5 - param_2;
    local_14 = local_14 & *(uint *)(param_1 + 0x10);
    if (iVar5 - param_2 == 0) {
      puVar3 = *(undefined4 **)(param_1 + 0x18);
      *(undefined4 *)(param_1 + 0x14) = 0x20;
      if (puVar3 == *(undefined4 **)(param_1 + 0x1c)) {
        *(undefined4 *)(param_1 + 0x14) = 1;
        *(undefined4 *)(param_1 + 0x10) = 0;
        *(undefined4 **)(param_1 + 0x18) = puVar3 + 1;
      }
      else {
        if (*(undefined4 **)(param_1 + 0x1c) < puVar3) {
          param_1[4] = (bf_read)0x1;
          *(undefined4 *)(param_1 + 0x10) = 0;
          iVar5 = *(int *)(this + 0x14);
          goto joined_r0x00257290;
        }
        *(undefined4 **)(param_1 + 0x18) = puVar3 + 1;
        *(undefined4 *)(param_1 + 0x10) = *puVar3;
      }
    }
    else {
      *(uint *)(param_1 + 0x10) = *(uint *)(param_1 + 0x10) >> ((byte)param_2 & 0x1f);
    }
  }
LAB_0025728a:
  iVar5 = *(int *)(this + 0x14);
joined_r0x00257290:
  bVar4 = (byte)iVar5;
  if (iVar5 < param_2) {
    puVar2 = *(uint **)(this + 0x18);
    uVar8 = (local_14 & (&CBitBuffer::s_nMaskTable)[iVar5]) << (0x20 - bVar4 & 0x1f) |
            *(uint *)(this + 0x10);
    *(uint *)(this + 0x10) = uVar8;
    if (puVar2 == *(uint **)(this + 0x1c)) {
      this[4] = (CBitWrite)0x1;
      CVar7 = (CBitWrite)0x1;
    }
    else {
      *(uint **)(this + 0x18) = puVar2 + 1;
      *puVar2 = uVar8;
      CVar7 = this[4];
    }
    *(uint *)(this + 0x10) = local_14 >> (bVar4 & 0x1f);
    *(int *)(this + 0x14) = 0x20 - (param_2 - iVar5);
  }
  else {
    uVar8 = local_14 << (0x20 - bVar4 & 0x1f) | *(uint *)(this + 0x10);
    *(int *)(this + 0x14) = iVar5 - param_2;
    *(uint *)(this + 0x10) = uVar8;
    if (iVar5 - param_2 == 0) {
      puVar2 = *(uint **)(this + 0x18);
      if (puVar2 == *(uint **)(this + 0x1c)) {
        this[4] = (CBitWrite)0x1;
        CVar7 = (CBitWrite)0x1;
      }
      else {
        *(uint **)(this + 0x18) = puVar2 + 1;
        *puVar2 = uVar8;
        CVar7 = this[4];
      }
      *(undefined4 *)(this + 0x10) = 0;
      *(undefined4 *)(this + 0x14) = 0x20;
    }
    else {
      CVar7 = this[4];
    }
  }
  bVar4 = 0;
  if (CVar7 == (CBitWrite)0x0) {
    bVar4 = (byte)param_1[4] ^ 1;
  }
  return bVar4;
}