// 
// sub_180006640 from 0x180006640 to 0x180006a3e (1022 bytes)
// 
// 2 xrefs:
// > sub_180007790 @ 0x1800078bf
// > <???> @ 0x1801f6330
// 
// This function is hookable on this platform!
// 
// Using BromaIDA 8.0.0 @ https://github.com/Stazzical/BromaIDA
// Using bindings at commit ba9f177b at Thu Jul 16 22:52:06 2026 from https://github.com/geode-sdk/bindings
// 

__int64 __fastcall sub_180006640(__int64 a1, _QWORD *a2)
{
  __int64 v2; // r12
  unsigned int v4; // edi
  int v5; // ebx
  __int64 v6; // rsi
  unsigned int v7; // eax
  int v8; // ebp
  int v9; // edi
  int v10; // r13d
  int v11; // ebp
  __int64 v12; // r14
  int v13; // edi
  __int64 v14; // rbx
  int v15; // eax
  int v16; // eax
  int v17; // ecx
  int v18; // r13d
  __int64 v19; // r9
  char *v20; // r8
  __int64 v21; // rcx
  __int64 v22; // rax
  bool v23; // cc
  int v24; // edi
  int v25; // r12d
  __int64 v26; // rbx
  __int64 v27; // rbp
  __int64 v28; // rdi
  int v29; // r14d
  unsigned __int16 v30; // ax
  int v32; // eax
  int v33; // edx
  int i; // ebp
  unsigned __int16 *v35; // rdx
  char v36; // bl
  int v37; // r8d
  __int64 v38; // r14
  char v39; // di
  int v40; // ecx
  int v41; // r9d
  unsigned int j; // r10d
  unsigned int v43; // eax
  int v44; // [rsp+50h] [rbp+8h]

  v2 = *(_QWORD *)(a1 + 32);
  v4 = 0;
  v5 = -1;
  v6 = sub_180018290(1, 64);
  v7 = sub_180001340((__int64)a2, 5);
  *(_DWORD *)(v6 + 48) = v7;
  v8 = 0;
  *(_QWORD *)(v6 + 8) = sub_1800182F0(v7);
  if ( *(int *)(v6 + 48) <= 0 )
  {
    *(_QWORD *)v6 = sub_1800182F0(0);
  }
  else
  {
    do
    {
      v9 = v5;
      *(_BYTE *)(v8 + *(_QWORD *)(v6 + 8)) = sub_180001340((__int64)a2, 4);
      v5 = *(char *)(v8 + *(_QWORD *)(v6 + 8));
      if ( v9 >= v5 )
        v5 = v9;
      ++v8;
    }
    while ( v8 < *(_DWORD *)(v6 + 48) );
    v10 = v5 + 1;
    *(_QWORD *)v6 = sub_1800182F0((unsigned int)(11 * (v5 + 1)));
    v11 = 0;
    if ( v5 + 1 > 0 )
    {
      while ( 1 )
      {
        v12 = 11LL * v11;
        *(_BYTE *)(v12 + *(_QWORD *)v6) = sub_180001340((__int64)a2, 3) + 1;
        *(_BYTE *)(v12 + *(_QWORD *)v6 + 1) = sub_180001340((__int64)a2, 2);
        if ( (int)sub_180001310(a2) < 0 )
          return 0;
        if ( *(_BYTE *)(*(_QWORD *)v6 + v12 + 1) )
          *(_BYTE *)(v12 + *(_QWORD *)v6 + 2) = sub_180001340((__int64)a2, 8);
        else
          *(_BYTE *)(*(_QWORD *)v6 + v12 + 2) = 0;
        if ( *(unsigned __int8 *)(*(_QWORD *)v6 + v12 + 2) >= *(int *)(v2 + 24) )
          return 0;
        v13 = 0;
        if ( 1 << *(_BYTE *)(*(_QWORD *)v6 + v12 + 1) > 0 )
        {
          v14 = 11LL * v11;
          do
          {
            *(_BYTE *)(*(_QWORD *)v6 + v14 + 3) = sub_180001340((__int64)a2, 8) - 1;
            v15 = *(unsigned __int8 *)(*(_QWORD *)v6 + v14 + 3);
            if ( v15 >= *(_DWORD *)(v2 + 24) && (_BYTE)v15 != 0xFF )
              return 0;
            ++v13;
            ++v14;
          }
          while ( v13 < 1 << *(_BYTE *)(v12 + *(_QWORD *)v6 + 1) );
        }
        if ( ++v11 >= v10 )
        {
          v4 = 0;
          goto LABEL_20;
        }
      }
    }
    v4 = 0;
  }
LABEL_20:
  *(_DWORD *)(v6 + 56) = sub_180001340((__int64)a2, 2) + 1;
  v16 = sub_180001340((__int64)a2, 4);
  v17 = *(_DWORD *)(v6 + 48);
  v18 = v16;
  if ( v17 > 0 )
  {
    v19 = (unsigned int)v17;
    v20 = *(char **)(v6 + 8);
    do
    {
      v21 = *v20++;
      v4 += *(char *)(11 * v21 + *(_QWORD *)v6);
      --v19;
    }
    while ( v19 );
  }
  *(_QWORD *)(v6 + 16) = sub_1800182F0(2 * (v4 + 2));
  *(_QWORD *)(v6 + 24) = sub_1800182F0(v4 + 2);
  *(_QWORD *)(v6 + 40) = sub_1800182F0(v4);
  v22 = sub_1800182F0(v4);
  v23 = *(_DWORD *)(v6 + 48) <= 0;
  v24 = 0;
  *(_QWORD *)(v6 + 32) = v22;
  v25 = 0;
  if ( !v23 )
  {
    v26 = 0;
    while ( 1 )
    {
      v24 += *(char *)(11LL * *(char *)(v25 + *(_QWORD *)(v6 + 8)) + *(_QWORD *)v6);
      v27 = v24;
      v44 = v24;
      if ( v26 < v24 )
        break;
LABEL_30:
      if ( ++v25 >= *(_DWORD *)(v6 + 48) )
        goto LABEL_31;
    }
    v28 = 2 * v26 + 4;
    v29 = __ROL4__(1, v18);
    while ( 1 )
    {
      v30 = sub_180001340((__int64)a2, v18);
      *(_WORD *)(v28 + *(_QWORD *)(v6 + 16)) = v30;
      if ( v30 >= v29 )
        return 0;
      ++v26;
      v28 += 2;
      if ( v26 >= v27 )
      {
        v24 = v44;
        goto LABEL_30;
      }
    }
  }
LABEL_31:
  if ( (unsigned int)sub_180001310(a2) )
    return 0;
  **(_WORD **)(v6 + 16) = 0;
  *(_WORD *)(*(_QWORD *)(v6 + 16) + 2LL) = 1 << v18;
  LOWORD(v32) = v24 + 2;
  *(_DWORD *)(v6 + 52) = v24 + 2;
  v33 = 0;
  if ( v24 + 2 > 0 )
  {
    do
    {
      *(_BYTE *)(v33 + *(_QWORD *)(v6 + 24)) = v33;
      ++v33;
      v32 = *(_DWORD *)(v6 + 52);
    }
    while ( v33 < v32 );
  }
  sub_180006ED0(*(_QWORD *)(v6 + 24), *(_QWORD *)(v6 + 16), (unsigned __int16)v32);
  for ( i = 0; i < *(_DWORD *)(v6 + 52) - 2; *(_BYTE *)(v38 + *(_QWORD *)(v6 + 32)) = v39 )
  {
    v35 = *(unsigned __int16 **)(v6 + 16);
    v36 = 0;
    v37 = 0;
    v38 = i;
    v39 = 1;
    v40 = 0;
    v41 = v35[1];
    for ( j = v35[i + 2]; v40 < i + 2; ++v35 )
    {
      v43 = *v35;
      if ( (int)v43 > v37 && v43 < j )
      {
        v36 = v40;
        v37 = *v35;
      }
      if ( (int)v43 < v41 && v43 > j )
      {
        v39 = v40;
        v41 = *v35;
      }
      ++v40;
    }
    ++i;
    *(_BYTE *)(v38 + *(_QWORD *)(v6 + 40)) = v36;
  }
  return v6;
}