RtlUTF8ToUnicodeN

NTSTATUS __stdcall RtlUTF8ToUnicodeN(
        WCHAR *UnicodeStringDestination,
        UINT64 UnicodeStringMaxByteCount,
        UINT64 *UnicodeStringActualByteCount,
        INT8 *UTF8StringSource,
        UINT64 UTF8StringByteCount){
  NTSTATUS v5; 
  INT8 *v6; 
  unsigned __int64 v7; 
  unsigned int v8; 
  WCHAR *v11; 
  WCHAR *v12; 
  unsigned int v13; 
  unsigned __int64 v14; 
  unsigned __int64 v15; 
  WCHAR *v16; 
  unsigned int v17; 
  unsigned int v18; 
  char v20; 
  int v21; 
  unsigned int v22; 
  WCHAR v23; 
  unsigned int v24; 
  unsigned int v25; 
  INT8 v26; 
  unsigned int v27; 
  int v28; 
  unsigned int v29; 
  __int64 v30; 

  v5 = 0;
  v6 = &UTF8StringSource[(unsigned int)UTF8StringByteCount];
  v7 = (unsigned __int64)(unsigned int)UnicodeStringMaxByteCount >> 1;
  v8 = 0;
  v11 = UnicodeStringDestination;
  v12 = &UnicodeStringDestination[v7];
  if( !UTF8StringSource )
    return -1073741582;
  if( !UnicodeStringDestination )
  {
    if( UnicodeStringActualByteCount )
      return CountUTF8ToUnicode(UTF8StringSource, (unsigned int)UTF8StringByteCount, UnicodeStringActualByteCount);
    else
      return -1073741811;
  }
  while( 1 )
  {
    if( UTF8StringSource >= v6 )
      goto LABEL_24;
    v13 = *UTF8StringSource++;
    if( !v8 )
    {
      LOWORD(v8) = v13;
      if( v13 <= 0x7F )
        goto LABEL_6;
LABEL_58:
      if( (v8 & 0x40) != 0 )
      {
        if( (v8 & 0x20) != 0 )
        {
          v24 = v8 & 0xF;
          if( (v8 & 0x10) == 0 )
          {
            v8 = v24 | 0x48228000;
            continue;
          }
          if( v24 <= 4 )
          {
            v8 = v24 | 0x504D0C00;
            continue;
          }
        }
        else
        {
          v25 = v8 & 0x1F;
          if( v25 > 1 )
          {
            v8 = v25 | 0x800000;
            continue;
          }
        }
      }
      goto LABEL_46;
    }
    if( (v13 & 0xC0) != 0x80 )
    {
      --UTF8StringSource;
LABEL_46:
      v5 = 263;
      LOWORD(v8) = -3;
      goto LABEL_6;
    }
    v8 = (v8 << 6) | v13 & 0x3F;
    if( (v8 & 0x20000000) == 0 )
    {
      if( (v8 & 0x10000000) != 0 )
      {
        if( (v8 & 0x800000) != 0 || (v8 & 0x1F0) - 16 <= 0xF0 )
          continue;
      }
      else if( (v8 & 0x3E0) != 0 && (v8 & 0x3E0) != 864 )
      {
        continue;
      }
      goto LABEL_46;
    }
    if( (v8 & 0x101F0000) > 0x10000000 )
      break;
LABEL_6:
    if( v11 >= v12 )
      goto LABEL_79;
    *v11++ = v8;
    v14 = v6 - UTF8StringSource;
    v15 = v12 - v11;
    if( (unsigned __int64)(v6 - UTF8StringSource) > 0xD )
    {
      if( v14 < v15 )
        v15 = v6 - UTF8StringSource;
      v16 = &v11[v15 - 7];
      if( v11 >= v16 )
        goto LABEL_28;
LABEL_11:
      v17 = *UTF8StringSource++;
      if( v17 > 0x7F )
        goto LABEL_33;
      *v11++ = v17;
      if( ((unsigned __int8)UTF8StringSource & 1) == 0 )
        goto LABEL_13;
      v17 = *UTF8StringSource++;
      if( v17 > 0x7F )
        goto LABEL_33;
      *v11++ = v17;
LABEL_13:
      if( ((unsigned __int8)UTF8StringSource & 2) == 0 )
        goto LABEL_16;
      v17 = *(unsigned __int16 *)UTF8StringSource;
      if( (v17 & 0x8080) == 0 )
      {
        UTF8StringSource += 2;
        *v11 = v17 & 0x7F;
        v11[1] = (v17 >> 8) & 0x7F;
LABEL_16:
        for( v11 += 2; v11 < v16; v11 += 8 )
        {
          v18 = *((_DWORD *)UTF8StringSource + 1);
          v17 = *(_DWORD *)UTF8StringSource;
          if( ((*(_DWORD *)UTF8StringSource | v18) & 0x80808080) != 0 )
            goto LABEL_29;
          UTF8StringSource += 8;
          *v11 = v17 & 0x7F;
          v11[1] = (v17 >> 8) & 0x7F;
          v11[2] = BYTE2(v17) & 0x7F;
          v11[3] = HIBYTE(v17) & 0x7F;
          v11[4] = v18 & 0x7F;
          v11[5] = (v18 >> 8) & 0x7F;
          v11[6] = BYTE2(v18) & 0x7F;
          v11[7] = HIBYTE(v18) & 0x7F;
        }
LABEL_28:
        v8 = 0;
        continue;
      }
LABEL_29:
      ++UTF8StringSource;
      if( (unsigned __int8)v17 > 0x7Fu )
      {
LABEL_33:
        v20 = *UTF8StringSource++;
        if( (v17 & 0x40) == 0 || (v20 & 0xC0) != 0x80 )
        {
LABEL_39:
          UTF8StringSource -= 2;
          goto LABEL_28;
        }
        v21 = v20 & 0x3F;
        if( (v17 & 0x20) != 0 )
        {
          v26 = *UTF8StringSource;
          v27 = ((v17 & 0xF) << 6) | v21;
          if( (v17 & 0x10) != 0 )
          {
            if( (v27 >> 4) - 1 > 0xF )
              goto LABEL_39;
            if( (v26 & 0xC0) != 0x80 )
              goto LABEL_39;
            v28 = v26 & 0x3F | (v27 << 6);
            if( (UTF8StringSource[1] & 0xC0) != 0x80 )
              goto LABEL_39;
            v29 = UTF8StringSource[1] & 0x3F | (v28 << 6);
            *v11++ = ((v29 >> 10) & 0x7FF) - 10304;
            v23 = (v29 & 0x3FF) - 9216;
            v30 = 2i64;
          }
          else
          {
            if( (v27 & 0x3E0) == 0 || (v27 & 0x3E0) == 864 || (v26 & 0xC0) != 0x80 )
              goto LABEL_39;
            v23 = v26 & 0x3F | ((_WORD)v27 << 6);
            v30 = 1i64;
          }
          UTF8StringSource += v30;
          --v16;
        }
        else
        {
          v22 = v17 & 0x1F;
          if( v22 <= 1 )
            goto LABEL_39;
          v23 = ((_WORD)v22 << 6) | v21;
        }
        *v11 = v23;
        --v16;
      }
      else
      {
        *v11 = (unsigned __int8)v17;
      }
      if( ++v11 >= v16 )
        goto LABEL_28;
      goto LABEL_11;
    }
    if( v15 >= v14 )
    {
      while( UTF8StringSource < v6 )
      {
        v8 = *UTF8StringSource++;
        if( v8 > 0x7F )
          goto LABEL_58;
        *v11++ = v8;
      }
      v8 = 0;
LABEL_24:
      if( v8 )
      {
        v5 = 263;
        if( v11 < v12 )
          *v11++ = -3;
        else
          v5 = -1073741789;
      }
      if( UnicodeStringActualByteCount )
        *(_DWORD *)UnicodeStringActualByteCount = 2 * (v11 - UnicodeStringDestination);
      return v5;
    }
    v8 = 0;
  }
  if( v11 < v12 )
  {
    *v11++ = ((v8 >> 10) & 0x7FF) - 10304;
    LOWORD(v8) = (v8 & 0x3FF) - 9216;
    goto LABEL_6;
  }
LABEL_79:
  if( UnicodeStringActualByteCount )
    *(_DWORD *)UnicodeStringActualByteCount = 2 * (v11 - UnicodeStringDestination);
  return -1073741789;
}

Referenced by: