EtwpCreatePerfectHashFunction

__int64 __fastcall EtwpCreatePerfectHashFunction(char a1, UINT16 *a2, unsigned __int16 a3, __int64 a4){
  unsigned __int8 v4; 
  __int64 v5; 
  _QWORD *v7; 
  unsigned __int16 v8; 
  UINT8 v9; 
  int v10; 
  unsigned __int16 v11; 
  __int16 v12; 
  char v13; 
  unsigned __int16 v14; 
  unsigned __int16 *p_Value; 
  __int64 v16; 
  unsigned __int16 *v17; 
  __int64 v18; 
  __int64 v19; 
  UINT8 v20; 
  UINT16 v21; 
  unsigned __int16 v22; 
  UINT16 v23; 
  VOID **PoolWithTag; 
  __int64 v25; 
  UINT16 MaxIndirectMappedCount; 
  int v29; 
  _QWORD *v30; 
  _ETW_PERFECT_HASH_TABLE_VALUE PerfectHashTable[128]; 

  v4 = 0;
  v5 = a3;
  v7 = (_QWORD *)a4;
  v30 = (_QWORD *)a4;
  v8 = 0;
  MaxIndirectMappedCount = 0;
  v9 = 0;
  v10 = a3 - 1;
  v11 = 1;
  v12 = 63;
  v29 = 63;
  if( v10 > 1 )
  {
    do
      v11 = (2 * v11) | 1;
    while( v11 < v10 );
    if( v11 > 0x40u )
      return 3221225473i64;
  }
LABEL_4:
  v13 = 0;
  while( 1 )
  {
    v14 = 0;
    p_Value = &PerfectHashTable[0].Value;
    v16 = 128i64;
    do
    {
      *p_Value = -1;
      p_Value += 2;
      --v16;
    }
    while( v16 );
    if( (_WORD)v5 )
    {
      v17 = a2;
      v18 = v5;
      do
      {
        v19 = (unsigned __int16)(v11 & __ROR2__(*v17, v13));
        if( PerfectHashTable[v19].Value == 0xFFFF )
        {
          ++v14;
          PerfectHashTable[v19].Value = *v17;
        }
        ++v17;
        --v18;
      }
      while( v18 );
      v7 = v30;
      v12 = v29;
    }
    v20 = v13;
    v21 = v11;
    if( v14 <= v8 )
      v20 = v9;
    if( v14 <= v8 )
      v21 = v12;
    v22 = v14;
    v9 = v20;
    if( v14 <= v8 )
      v22 = v8;
    v8 = v22;
    if( v14 == (_WORD)v5 )
      break;
    ++v13;
    v12 = v21;
    v29 = v21;
    if( (unsigned __int8)v13 >= 0x10u )
    {
      v11 = (2 * v11) | 1;
      if( v11 <= 0x40u )
        goto LABEL_4;
      break;
    }
  }
  if( !v22 )
    return 3221225473i64;
  v23 = EtwpFillPerfectHashTable(a2, v5, v20, v21, PerfectHashTable, &MaxIndirectMappedCount);
  PoolWithTag = ExAllocatePoolWithTag(0x200ui64, (unsigned __int16)(4 * v23 + 10), 1182233669i64);
  if( !PoolWithTag )
    return 3221225495i64;
  *((_BYTE *)PoolWithTag + 1) = v9;
  *((_WORD *)PoolWithTag + 1) = v21;
  *((_WORD *)PoolWithTag + 2) = v23;
  *(_BYTE *)PoolWithTag = a1 != 0;
  if( v23 )
  {
    do
    {
      v25 = v4++;
      *(_ETW_PERFECT_HASH_TABLE_VALUE *)((char *)PoolWithTag + 4 * v25 + 6) = PerfectHashTable[v25];
    }
    while( v4 < v23 );
  }
  *v7 = PoolWithTag;
  return 0i64;
}

Referenced by: