CUtlVector<CParticleSystemMgr::RenderCache_t,CUtlMemory<CParticleSystemMgr::RenderCache_t,int>>::InsertBefore

/* CUtlVector<CParticleSystemMgr::RenderCache_t, CUtlMemory<CParticleSystemMgr::RenderCache_t, int>
   >::InsertBefore(int) */

int __thiscall
CUtlVector<CParticleSystemMgr::RenderCache_t,CUtlMemory<CParticleSystemMgr::RenderCache_t,int>>::
InsertBefore(CUtlVector<CParticleSystemMgr::RenderCache_t,CUtlMemory<CParticleSystemMgr::RenderCache_t,int>>
             *this,int param_1)

{
  void *pvVar1;
  int iVar2;
  int iVar3;
  int iVar4;
  
  iVar4 = *(int *)(this + 4);
  iVar3 = *(int *)(this + 0xc) + 1;
  if (iVar4 < iVar3) {
    iVar2 = *(int *)(this + 8);
    if (-1 < iVar2) {
      if (iVar2 == 0) {
        if (iVar4 == 0) {
          if (iVar3 < 3) {
            iVar2 = 2;
            goto LAB_00bd5c5f;
          }
          iVar4 = 2;
        }
        do {
          iVar2 = iVar4 * 2;
          if (iVar3 <= iVar2) break;
          iVar2 = iVar4 * 4;
          iVar4 = iVar2;
        } while (iVar2 < iVar3);
      }
      else {
        for (iVar2 = iVar2 * (*(int *)(this + 0xc) / iVar2 + 1); iVar2 < iVar3;
            iVar2 = (iVar2 + iVar3) / 2) {
        }
      }
LAB_00bd5c5f:
      *(int *)(this + 4) = iVar2;
      if (*(void **)this == (void *)0x0) {
        pvVar1 = malloc(iVar2 * 0x18);
        *(void **)this = pvVar1;
      }
      else {
        pvVar1 = realloc(*(void **)this,iVar2 * 0x18);
        *(void **)this = pvVar1;
        iVar3 = *(int *)(this + 0xc) + 1;
      }
      goto LAB_00bd5bce;
    }
  }
  pvVar1 = *(void **)this;
LAB_00bd5bce:
  *(int *)(this + 0xc) = iVar3;
  iVar3 = (iVar3 - param_1) + -1;
  *(void **)(this + 0x10) = pvVar1;
  iVar4 = param_1 * 0x18;
  if (0 < iVar3) {
    _V_memmove((void *)((int)pvVar1 + iVar4 + 0x18),(void *)((int)pvVar1 + iVar4),iVar3 * 0x18);
    pvVar1 = *(void **)this;
  }
  pvVar1 = (void *)((int)pvVar1 + iVar4);
  if (pvVar1 != (void *)0x0) {
    *(undefined4 *)((int)pvVar1 + 4) = 0;
    *(undefined4 *)((int)pvVar1 + 8) = 0;
    *(undefined4 *)((int)pvVar1 + 0xc) = 0;
    *(undefined4 *)((int)pvVar1 + 0x10) = 0;
    *(undefined4 *)((int)pvVar1 + 0x14) = 0;
  }
  return param_1;
}