Libraries: Сode that records balance and equity charts and calculates additional optimization criteria

[Automated-Trading]

Сode that records balance and equity charts and calculates additional optimization criteria:

If you have access to the Expert Advisor code, you can save balance and equity charts and calculate additional optimization criteria by adding additional code from this library.

Author: Aleksei Kuznetsov

[hini]

It's a very useful library. When used in conjunction with the author's product, more advanced trading analysis indicators can be obtained.

[Aleksei Kuznetsov]

save_Add( AvgPips, 2, "自定义1", true); When I change the name of a custom metric to Chinese, an error occurs. Changing the name of a built-in metric to Chinese also results in an error. It seems that only English is supported?

   save_Add( AvgPips, 2, "Custom 1", true);//value, digits, name, sort_min_to_max

I've found a way to add unicode to custom criteria names. Use character codes. For example:
Новая страница
It looks like this in Russian:

[hini]

Aleksei Kuznetsov # :

I've found a way to add unicode to custom criteria names. Use character codes . For example:
Новая страница
It looks like this in Russian:

While this is feasible, I don't understand the difficulties in supporting UTF8. Could the codepage be set?

int    StringToCharArray ( 
   string   text_string,         
   uchar &  array[],             
   int      start= 0 ,             
   int      count=- 1              
   uint     codepage= CP_ACP     
   );

string  CharArrayToString(
   uchar  array[],              
   int    start=0,              
   int    count=-1              
   uint    codepage=CP_ACP      
   );

[Aleksei Kuznetsov]

hini #:
StringToCharArray

codepage=CP_ACP is the default value.
1 byte is stored in the Char array. I have proposed a working unicode solution. Each of the characters in я can be encoded in 1 byte.

You can use this online converter: https://r12a.github.io/app-conversion/

For your sample: 自定义1  =  自定义1

If you find another working solution, please share it.

[hini]

Aleksei Kuznetsov # :
codepage=CP_ACP is the default value.
1 byte is stored in the array. I have proposed a working unicode solution. Each of the characters in & # 1103 can be encoded in 1 byte .
If you find another working solution, please share it.

void add( uchar &a[], string    v){add(a, StringLen (v)); StringToCharArray (v, a, ArraySize (a), -1, CP_UTF8 );}

Then can't we just read it in the panel by setting the last parameter of `CharArrayToString` to `CP_UTF8`?

[Aleksei Kuznetsov]

hini #:
Then can't we just read it in the panel by setting the last parameter of `CharArrayToString` to `CP_UTF8`?

it didn't work in my test.

[hini]

#property script_show_inputs

 enum ENUM_OPERATION {
  OP_SAVE = 0 ,   // Save 
  OP_LOAD = 1      // Load 
};

 input ENUM_OPERATION InpOperation = OP_SAVE;

 //+------------------------------------------------------------------+
 bool SaveStringToFile( string fileName, string text) {
   int handle = FileOpen (fileName, FILE_WRITE | FILE_BIN );
   if (handle == INVALID_HANDLE ) return false ;

   uchar data[];
   int size = StringToCharArray (text, data, 0 , - 1 , CP_UTF8 );
   Print ( "text length: " , StringLen (text));
   Print ( "data size: " , ArraySize (data)); 

   if (size > 0 ) {
     FileWriteArray (handle, data, 0 , size);
     FileClose (handle);
     Print ( "Save OK" );
     return true ;
  }

   FileClose (handle);
   return false ;
}

 //+------------------------------------------------------------------+
 bool LoadStringFromFile( string fileName, string &text) {
   int handle = FileOpen (fileName, FILE_READ | FILE_BIN );
   if (handle == INVALID_HANDLE ) return false ;

   uint fileSize = ( uint ) FileSize (handle);
   if (fileSize == 0 ) {
     FileClose (handle);
     return false ;
  }

   uchar data[];
   ArrayResize (data, fileSize);
   FileReadArray (handle, data, 0 , fileSize);
   FileClose (handle);

  text = CharArrayToString (data, 0 , WHOLE_ARRAY , CP_UTF8 );
   Print ( "read: " ,text);
   return true ;
}

 //+------------------------------------------------------------------+
 void OnStart () {
   string fileName = "test.bin" ;
   string testText = "Test Chinese text: 这是测试中文字符串" ;
  
   if (InpOperation == OP_SAVE) {
    SaveStringToFile(fileName, testText);
  } else {
     string loadedText = "" ;
    LoadStringFromFile(fileName, loadedText);
  }
}
 //+------------------------------------------------------------------+

My tests did not find any issues. You might need to pay attention to the length of the saved string; it should be "ArraySize" after being converted to an array, not "StringLen".

[hini]

void add( uchar &a[], string     v){add(a, StringLen (v) ); StringToCharArray (v, a, ArraySize (a), - 1 , CP_UTF8 );}

This should not be StringLen.

void add(uchar &a[], string v) {
  uchar temp[];
  int byteCount = StringToCharArray(v, temp, 0, -1, CP_UTF8);

  add(a, byteCount);

  if(byteCount > 0) {
    int currentSize = ArraySize(a);
    ArrayResize(a, currentSize + byteCount);
    ArrayCopy(a, temp, currentSize, 0, byteCount);
  }
}

[Aleksei Kuznetsov]

hini #:

This should not be StringLen.

This is a great solution.

I have added UTF support for UTF characters in Custom Criteria names to this library and to the report.

Note: UTF files are twice as large as ASCII files. For large reports > 50,000 passes, it is preferable to use only Latin characters or/and solution from this post https://www.mql5.com/en/forum/504277#comment_59090091.