PnpParseIndirectInfString

char __fastcall PnpParseIndirectInfString(const wchar_t *a1){
  _WORD *v1; 
  __int16 v3; 
  __int64 v4; 
  __int64 i; 
  __int16 v6; 
  int v7; 
  __int64 v8; 
  __int64 v9; 
  __int16 v10; 
  __int64 v11; 
  unsigned __int64 pcchLength; 

  pcchLength = 0i64;
  if( RtlUnalignedStringCchLengthW(a1, 0x7FFF, (_SIZE_T *)&pcchLength) < 0 || pcchLength < 5 || *v1 != 64 )
    return 0;
  v3 = v1[1];
  LODWORD(v4) = 1;
  while( v3 && v3 != 44 )
  {
    v4 = (unsigned int)(v4 + 1);
    v3 = v1[v4];
  }
  if( v1[(unsigned int)v4] != 44 || v1[(unsigned int)(v4 + 1)] != 37 )
    return 0;
  for( i = (unsigned int)(v4 + 2); ; i = (unsigned int)(i + 1) )
  {
    v6 = v1[i];
    if( !v6 || v6 == 59 )
      break;
  }
  v7 = 0;
  if( v1[i] == 59 )
    v7 = i;
  if( v7 )
  {
    v8 = (unsigned int)(v7 - 1);
  }
  else
  {
    if( pcchLength > 0xFFFFFFFF )
      return 0;
    v8 = (unsigned int)(pcchLength - 1);
  }
  if( v1[v8] != 37 )
    return 0;
  if( v7 )
  {
    v9 = (unsigned int)(v7 + 1);
    v10 = v1[v9];
    if( v10 )
    {
      v11 = (unsigned int)(v9 + 1);
      do
      {
        if( v10 == 59 && v1[v11] == 40 && v1[(unsigned int)(pcchLength - 1)] == 41 )
          break;
        v9 = (unsigned int)(v9 + 1);
        v11 = (unsigned int)(v11 + 1);
        v10 = v1[v9];
      }
      while( v10 );
    }
  }
  return 1;
}

Referenced by:

CmGetDeviceMappedPropertyFromRegProp
CmGetInstallerClassMappedPropertyFromRegProp
PnpRegQueryValueIndirect