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60精币
60枚精币悬赏,请将下列C++语言程序改成易语言程序。
//+------------------------------------------------------------------+
//| Sample DLL for MQL4 |
//| Copyright 2000-2021, MetaQuotes Ltd. |
//| www.metaquotes.net |
//+------------------------------------------------------------------+
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
//---
#define MT4_EXPFUNC __declspec(dllexport)
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
#pragma pack(push,1)
struct RateInfo
{
__int64 ctm;
double open;
double low;
double high;
double close;
unsigned __int64 vol_tick;
int spread;
unsigned __int64 vol_real;
};
#pragma pack(pop)
//---
struct MqlStr
{
int len;
char *string;
};
static int CompareMqlStr(const void *left,const void *right);
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
BOOL APIENTRY DllMain(HANDLE hModule,DWORD ul_reason_for_call,LPVOID lpReserved)
{
//---
switch(ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
//---
return(TRUE);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC int __stdcall GetIntValue(const int ipar)
{
printf("GetIntValue takes %d\n",ipar);
return(ipar);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC double __stdcall GetDoubleValue(const double dpar)
{
printf("GetDoubleValue takes %.8lf\n",dpar);
return(dpar);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC wchar_t* __stdcall GetStringValue(wchar_t *spar)
{
wprintf(L"GetStringValue takes \"%s\"\n",spar);
return(spar);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC double __stdcall GetArrayItemValue(const double *arr,const int arraysize,const int nitem)
{
//---
if(arr==NULL)
{
printf("GetArrayItemValue: NULL array\n");
return(0.0);
}
if(arraysize<=0)
{
printf("GetArrayItemValue: wrong arraysize (%d)\n", arraysize);
return(0.0);
}
if(nitem<0 || nitem>=arraysize)
{
printf("GetArrayItemValue: wrong item number (%d)\n", nitem);
return(0.0);
}
//---
return(arr[nitem]);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC bool _stdcall SetArrayItemValue(double *arr,const int arraysize,const int nitem,const double value)
{
//---
if(arr==NULL)
{
printf("GetArrayItemValue: NULL array\n");
return(FALSE);
}
if(arraysize<=0)
{
printf("GetArrayItemValue: wrong arraysize (%d)\n", arraysize);
return(FALSE);
}
if(nitem<0 || nitem>=arraysize)
{
printf("GetArrayItemValue: wrong item number (%d)\n", nitem);
return(FALSE);
}
//---
arr[nitem]=value;
return(TRUE);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC double __stdcall GetRatesItemValue(const RateInfo* rates,const int rates_total,const int shift,const int nrate)
{
//---
if(rates==NULL)
{
printf("GetRatesItemValue: NULL array\n");
return(0.0);
}
//---
if(rates_total<0)
{
printf("GetRatesItemValue: wrong rates_total number (%d)\n", rates_total);
return(0.0);
}
//---
if(shift<0 || shift>=rates_total)
{
printf("GetRatesItemValue: wrong shift number (%d)\n", shift);
return(0.0);
}
//---
if(nrate<0 || nrate>5)
{
printf("GetRatesItemValue: wrong rate index (%d)\n", nrate);
return(0.0);
}
//---
int nitem=rates_total-1-shift;
switch(nrate)
{
case 0: return double(rates[nitem].ctm);
case 1: return rates[nitem].open;
case 2: return rates[nitem].low;
case 3: return rates[nitem].high;
case 4: return rates[nitem].close;
case 5: return double(rates[nitem].vol_tick);
}
//---
return(0.0);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC int __stdcall SortStringArray(MqlStr *arr,const int arraysize)
{
//---
if(arr==NULL)
{
printf("SortStringArray: NULL array\n");
return(-1);
}
if(arraysize<=0)
{
printf("SortStringArray: wrong arraysize (%d)\n", arraysize);
return(-1);
}
//---
qsort(arr,arraysize,sizeof(MqlStr),CompareMqlStr);
//---
return(arraysize);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
MT4_EXPFUNC int __stdcall ProcessStringArray(MqlStr *arr,const int arraysize)
{
int len1,len2;
//---
if(arr==NULL)
{
printf("ProcessStringArray: NULL array\n");
return(-1);
}
if(arraysize<=0)
{
printf("ProcessStringArray: wrong arraysize (%d)\n", arraysize);
return(-1);
}
//---
for(int i=0; i<arraysize-1; i++)
{
if(arr[i].string==NULL)
len1=0;
else
len1=strlen(arr[i].string);
if(arr[i+1].string==NULL)
len2=0;
else
len2=strlen(arr[i+1].string);
//--- uninitialized string
if(arr[i+1].string==NULL)
continue;
//--- destination string is uninitialized and cannot be allocated within dll
if(arr[i].string==NULL)
continue;
//--- memory piece is less than needed and cannot be reallocated within dll
if(arr[i].len<len1+len2)
continue;
//--- final processing
strcat(arr[i].string,arr[i+1].string);
}
//---
return(arraysize);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int CompareMqlStr(const void *left,const void *right)
{
MqlStr *leftstr=(MqlStr *)left;
MqlStr *rightstr=(MqlStr *)right;
//---
if(leftstr->string==NULL)
return(-1);
if(rightstr->string==NULL)
return(1);
//---
return(strcmp(leftstr->string,rightstr->string));
}
//+------------------------------------------------------------------+
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