CDispInfo::AddShadowDecal

/* WARNING: Globals starting with '_' overlap smaller symbols at the same address */
/* CDispInfo::AddShadowDecal(unsigned short) */

uint __thiscall CDispInfo::AddShadowDecal(CDispInfo *this,ushort param_1)

{
  ushort uVar1;
  ushort uVar2;
  int iVar3;
  ushort uVar4;
  uint uVar5;
  uint uVar6;
  undefined4 *puVar7;
  int iVar8;
  int iVar9;
  
  uVar5 = CUtlLinkedList<CDispShadowDecal,unsigned_short,true,unsigned_short,CUtlMemory<UtlLinkedListElem_t<CDispShadowDecal,unsigned_short>,unsigned_short>>
          ::AllocInternal((CUtlLinkedList<CDispShadowDecal,unsigned_short,true,unsigned_short,CUtlMemory<UtlLinkedListElem_t<CDispShadowDecal,unsigned_short>,unsigned_short>>
                           *)&s_DispShadowDecals,true);
  uVar4 = (ushort)uVar5;
  if (uVar4 == 0xffff) {
    iVar8 = 0x1bffe4;
    uVar6 = 0xffff;
  }
  else {
    uVar6 = uVar5 & 0xffff;
    iVar8 = uVar6 * 0x1c;
    puVar7 = (undefined4 *)(iVar8 + s_DispShadowDecals);
    if (puVar7 != (undefined4 *)0x0) {
      *puVar7 = 0;
      puVar7[1] = 0;
      puVar7[2] = 0;
      *(undefined1 *)(puVar7 + 3) = 2;
    }
  }
  uVar1 = *(ushort *)(this + 0x260);
  CUtlLinkedList<CDispShadowDecal,unsigned_short,true,unsigned_short,CUtlMemory<UtlLinkedListElem_t<CDispShadowDecal,unsigned_short>,unsigned_short>>
  ::Unlink((CUtlLinkedList<CDispShadowDecal,unsigned_short,true,unsigned_short,CUtlMemory<UtlLinkedListElem_t<CDispShadowDecal,unsigned_short>,unsigned_short>>
            *)&s_DispShadowDecals,(ushort)uVar6);
  iVar3 = s_DispShadowDecals;
  iVar8 = iVar8 + s_DispShadowDecals;
  *(ushort *)(iVar8 + 0x1a) = uVar1;
  uVar2 = DAT_0039ecba;
  if (uVar1 == 0xffff) {
    uVar1 = uVar4;
    *(ushort *)(iVar8 + 0x18) = DAT_0039ecba;
    DAT_0039ecba = uVar1;
  }
  else {
    iVar9 = (uint)uVar1 * 0x1c + iVar3;
    uVar2 = *(ushort *)(iVar9 + 0x18);
    *(ushort *)(iVar8 + 0x18) = uVar2;
    *(ushort *)(iVar9 + 0x18) = uVar4;
  }
  uVar1 = uVar4;
  if (uVar2 != 0xffff) {
    *(ushort *)(iVar3 + 0x1a + (uint)uVar2 * 0x1c) = uVar4;
    uVar1 = _DAT_0039ecb8;
  }
  _DAT_0039ecb8 = uVar1;
  _DAT_0039ecbe = _DAT_0039ecbe + 1;
  *(ushort *)(this + 0x260) = uVar4;
  *(ushort *)(iVar8 + 0x12) = param_1;
  *(undefined2 *)(iVar8 + 0x10) = 0;
  *(undefined2 *)(iVar8 + 0xe) = 0;
  *(undefined2 *)(iVar8 + 0x14) = 0xffff;
  return uVar5;
}