Thread: regex and c++

  1. #1
    Registered User Joelito's Avatar
    Join Date
    Mar 2005
    Tijuana, BC, México

    regex and c++

    Hi, I'm trying to output only a few files, using regex, from the current directory, this is my main code:
    // main.cpp
    		char * _dir = new char[MAX_PATH];
    		getcwd(_dir, MAX_PATH);
    		unique_ptr<CExtractor> _ptr(new CExtractor(_dir));
    		delete[] _dir;
    // CExtractor.cpp
    DIR *pdir = NULL;
    	struct dirent *pent = NULL;
    	pdir = opendir(_cwd.c_str());
    	while ((pent = readdir(pdir)) && (pent->d_type != DT_DIR)) {
    		if (regex_match(pent->d_name, regex("\\.(in|txt)$"), std::regex_constants::icase)) {
    			cout << pent->d_name << endl;
    My code is compiled correctly, but when I run my binary, nothings is are my files in the current directpory:
    aclocal.m4 config.guess config.status depcomp m4 NEWS
    AUTHORS config.h config.sub INSTALL Makefile README
    autom4te.cache configure install-sh src
    ChangeLog libtool stamp-h1
    compile config.log COPYING missing
    As you can see, I have a few "in" files
    * PC: Intel Core 2 DUO E6550 @ 2.33 GHz with 2 GB RAM: Archlinux-i686 with xfce4.
    * Laptop: Intel Core 2 DUO T6600 @ 2.20 GHz with 4 GB RAM: Archlinux-x86-64 with xfce4.

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Have you done a simple test like
            if (regex_match("foo.txt", regex("\\.(in|txt)$"), std::regex_constants::icase)) {
                cout << "foo.txt matches" << endl;
    If that works, then examine pent->d_name in detail in the debugger.

    If it doesn't work, well then fix the literal test until it does work.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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