/* Agent_Release_x64.exe sha256 6f2be7b8eb799ba51b359d1958720aac5baee5b7ee0d1d36684d3cbd72d45469
 * Ghidra 12.1.2 decompiler output for 0x14000a630 FUN_14000a630
 * Pseudocode, not original source. */

wchar_t FUN_14000a630(basic_streambuf<wchar_t,std::char_traits<wchar_t>_> *param_1,wchar_t param_2)

{
  void *pvVar1;
  basic_streambuf<wchar_t,std::char_traits<wchar_t>_> bVar2;
  int iVar3;
  void *_Src;
  longlong lVar4;
  longlong lVar5;
  wchar_t *pwVar6;
  ulonglong uVar7;
  void *pvVar8;
  undefined4 uVar9;
  ulonglong uVar10;
  
  if (((byte)param_1[0x78] & 8) != 0) {
    uVar7 = **(ulonglong **)(param_1 + 0x48);
    if ((uVar7 != 0) && (uVar10 = *(ulonglong *)(param_1 + 0x70), uVar7 < uVar10)) {
      iVar3 = **(int **)(param_1 + 0x60);
      **(ulonglong **)(param_1 + 0x48) = uVar10;
      **(undefined4 **)(param_1 + 0x60) =
           (int)((longlong)((uVar7 + (longlong)iVar3 * 2) - uVar10) >> 1);
    }
  }
  if (param_2 == L'\xffff') {
    return L'\0';
  }
  uVar7 = **(ulonglong **)(param_1 + 0x48);
  if ((uVar7 != 0) && (uVar7 < uVar7 + (longlong)**(int **)(param_1 + 0x60) * 2)) {
    pwVar6 = std::basic_streambuf<wchar_t,std::char_traits<wchar_t>_>::_Pninc(param_1);
    *pwVar6 = param_2;
    return param_2;
  }
  if (((byte)param_1[0x78] & 2) != 0) {
    return L'\xffff';
  }
  uVar10 = 0;
  if (uVar7 != 0) {
    uVar10 = (longlong)
             (((longlong)**(int **)(param_1 + 0x60) * 2 - **(longlong **)(param_1 + 0x20)) + uVar7)
             >> 1;
  }
  uVar7 = uVar10 >> 1;
  if (uVar7 < 0x20) {
    uVar7 = 0x20;
  }
  else if (uVar7 == 0) {
    return L'\xffff';
  }
  do {
    if (uVar10 <= 0x7fffffff - uVar7) break;
    uVar7 = uVar7 >> 1;
  } while (uVar7 != 0);
  if (uVar7 == 0) {
    return L'\xffff';
  }
  uVar7 = uVar7 + uVar10;
  pvVar8 = FUN_140001a50(uVar7);
  _Src = (void *)**(undefined8 **)(param_1 + 0x20);
  uVar9 = (undefined4)((longlong)pvVar8 >> 1);
  if ((uVar10 == 0) || (memcpy(pvVar8,_Src,uVar10 * 2), uVar10 == 0)) {
    *(void **)(param_1 + 0x70) = pvVar8;
    **(undefined8 **)(param_1 + 0x28) = pvVar8;
    **(undefined8 **)(param_1 + 0x48) = pvVar8;
    **(undefined4 **)(param_1 + 0x60) = (int)((longlong)(uVar7 * 2) >> 1);
    bVar2 = param_1[0x78];
    **(undefined8 **)(param_1 + 0x20) = pvVar8;
    if (((byte)bVar2 & 4) == 0) {
      **(undefined8 **)(param_1 + 0x40) = pvVar8;
      **(undefined4 **)(param_1 + 0x58) = 1;
    }
    else {
      **(undefined8 **)(param_1 + 0x40) = 0;
      **(undefined4 **)(param_1 + 0x58) = uVar9;
    }
  }
  else {
    *(void **)(param_1 + 0x70) =
         (void *)((longlong)pvVar8 + (*(longlong *)(param_1 + 0x70) - (longlong)_Src >> 1) * 2);
    pvVar1 = (void *)((longlong)pvVar8 + (**(longlong **)(param_1 + 0x48) - (longlong)_Src >> 1) * 2
                     );
    **(longlong **)(param_1 + 0x28) =
         (longlong)((longlong)pvVar8 + (**(longlong **)(param_1 + 0x28) - (longlong)_Src >> 1) * 2);
    **(longlong **)(param_1 + 0x48) = (longlong)pvVar1;
    **(undefined4 **)(param_1 + 0x60) =
         (int)((longlong)((uVar7 * 2 - (longlong)pvVar1) + (longlong)pvVar8) >> 1);
    if (((byte)param_1[0x78] & 4) == 0) {
      lVar4 = **(longlong **)(param_1 + 0x48);
      lVar5 = **(longlong **)(param_1 + 0x40);
      **(undefined8 **)(param_1 + 0x20) = pvVar8;
      pvVar8 = (void *)((longlong)pvVar8 + (lVar5 - (longlong)_Src >> 1) * 2);
      **(longlong **)(param_1 + 0x40) = (longlong)pvVar8;
      **(undefined4 **)(param_1 + 0x58) = (int)((lVar4 - (longlong)pvVar8) + 2 >> 1);
    }
    else {
      **(undefined8 **)(param_1 + 0x20) = pvVar8;
      **(undefined8 **)(param_1 + 0x40) = 0;
      **(undefined4 **)(param_1 + 0x58) = uVar9;
    }
  }
  if (((byte)param_1[0x78] & 1) != 0) {
    operator_delete(_Src);
  }
  *(uint *)(param_1 + 0x78) = *(uint *)(param_1 + 0x78) | 1;
  pwVar6 = std::basic_streambuf<wchar_t,std::char_traits<wchar_t>_>::_Pninc(param_1);
  *pwVar6 = param_2;
  return param_2;
}