| // FileBasedFeatureExport.mqh
|
| // Alternative to DLL-based feature export for strategy tester compatibility
|
|
|
| #ifndef FILE_BASED_FEATURE_EXPORT_MQH
|
| #define FILE_BASED_FEATURE_EXPORT_MQH
|
|
|
| #include <Files\FileBin.mqh>
|
|
|
| class CFileBasedFeatureExport
|
| {
|
| private:
|
| string m_base_dir;
|
| int m_file_counter;
|
|
|
| public:
|
| CFileBasedFeatureExport()
|
| {
|
| m_base_dir = "";
|
| m_file_counter = 0;
|
| // Using FILE_COMMON for all writes; no directory creation needed
|
| }
|
|
|
| ~CFileBasedFeatureExport()
|
| {
|
| }
|
|
|
| // Export feature batch to file (replaces DLL function)
|
| int ExportFeatureBatch(const uchar &pb_bytes[], int pb_len, uchar &out_path[], int out_path_len)
|
| {
|
| // Validate input parameters
|
| if (pb_len <= 0)
|
| {
|
| return -1; // Invalid input
|
| }
|
|
|
| // Generate timestamped filename
|
| string filename = GenerateTimestampedFilename();
|
| string full_path = filename;
|
|
|
| // Write binary data to file
|
| CFileBin file;
|
| if (!file.Open(full_path, FILE_BIN | FILE_WRITE | FILE_COMMON))
|
| {
|
| Print("Failed to open file for writing: ", full_path);
|
| return -3; // Failed to open file
|
| }
|
|
|
| // Write the binary data using proper MQL5 method
|
| for(int i = 0; i < pb_len; i++)
|
| {
|
| file.WriteChar((char)pb_bytes[i]);
|
| }
|
| file.Close();
|
|
|
| // Copy the output path to the provided buffer
|
| int path_len = StringLen(full_path);
|
| if (ArraySize(out_path) > path_len)
|
| {
|
| StringToCharArray(full_path, out_path);
|
| out_path[path_len] = 0; // Null terminator
|
| }
|
|
|
| Print("Feature batch exported to: ", full_path);
|
| return 0; // Success
|
| }
|
|
|
| // Alternative method for string-based features (more common in MQL5)
|
| int ExportStringFeatures(const string &features[], int feature_count, string &out_path)
|
| {
|
| if (feature_count <= 0)
|
| {
|
| return -1; // Invalid input
|
| }
|
|
|
| // Generate timestamped filename
|
| string filename = GenerateTimestampedFilename();
|
| string full_path = filename;
|
|
|
| // Write features as text file
|
| int file_handle = FileOpen(full_path, FILE_WRITE | FILE_TXT | FILE_COMMON);
|
| if (file_handle == INVALID_HANDLE)
|
| {
|
| Print("Failed to open file for writing: ", full_path);
|
| return -3; // Failed to open file
|
| }
|
|
|
| // Write each feature on a new line
|
| for (int i = 0; i < feature_count; i++)
|
| {
|
| FileWriteString(file_handle, features[i]);
|
| FileWriteString(file_handle, "\n");
|
| }
|
|
|
| FileClose(file_handle);
|
|
|
| out_path = full_path;
|
| Print("String features exported to: ", full_path);
|
| return 0; // Success
|
| }
|
|
|
| // Get version info (replaces DLL function)
|
| int GetFeatureExportVersion(string &version)
|
| {
|
| version = "1.0.0 (File-Based)";
|
| return 0; // Success
|
| }
|
|
|
| private:
|
|
|
| void CreateDirectoryStructure()
|
| {
|
| // No-op when using FILE_COMMON storage
|
| }
|
|
|
| string GenerateTimestampedFilename()
|
| {
|
| datetime now = TimeCurrent();
|
| MqlDateTime dt;
|
| TimeToStruct(now, dt);
|
| m_file_counter++;
|
| return StringFormat("feature_batch_%04d%02d%02d_%02d%02d%02d_%03d.txt",
|
| dt.year, dt.mon, dt.day,
|
| dt.hour, dt.min, dt.sec,
|
| m_file_counter % 1000);
|
| }
|
|
|
|
|
| };
|
|
|
| // Global instance for easy access
|
| CFileBasedFeatureExport g_file_exporter;
|
|
|
| #endif // FILE_BASED_FEATURE_EXPORT_MQH
|
