c++ builder XE4, 10.2 Tokyo > fileIO > サブフォルダに含まれる全ファイル数取得の実装 > 日付期間でフィルタ

C++ Builder XE4
RAD Studio 10.2 Tokyo Update 2 (追記: 2018/01/09)

static int __fastcall s_getTotalFileNumbers_dateRange(String targetDir, TDateTime fromDt, TDateTime toDt)
{
    if (DirectoryExists(targetDir) == false) {
        return 0;
    }

    String filePattern = L"*.*";
    TStringDynArray fileList;
    TSearchOption option = TSearchOption::soAllDirectories; // all folders

    fileList = TDirectory::GetFiles(targetDir, filePattern, option);

    int filecnt = fileList.Length;
    TDateTime fildt;
    int skipcnt = 0;
    for(int idx = 0; idx < filecnt; idx++) {
        fildt = TFile::GetLastWriteTime(fileList[idx]);
        if (fildt < fromDt || fildt > toDt) {
            skipcnt++;
        }
    }
    return (filecnt - skipcnt);
}