Пример #1
0
/*
 * vislib::sys::Path::Concatenate
 */
vislib::StringW vislib::sys::Path::Concatenate(const StringW& lhs, 
        const StringW& rhs, const bool canonicalise) {
    StringW retval(lhs);

    if (lhs.EndsWith(SEPARATOR_W) && rhs.StartsWith(SEPARATOR_W)) {
        retval.Append(rhs.PeekBuffer() + 1);

    } else if (!lhs.EndsWith(SEPARATOR_W) && !rhs.StartsWith(SEPARATOR_W)) {
        retval.Append(SEPARATOR_W);
        retval.Append(rhs);

    } else {
        retval.Append(rhs);
    }

    return canonicalise ? Path::Canonicalise(retval) : retval;
}
Пример #2
0
/*
 * vislib::sys::Path::IsRelative
 */
bool vislib::sys::Path::IsRelative(const StringW& path) {
#ifdef _WIN32
    return (::PathIsRelativeW(path.PeekBuffer()) != FALSE)
        || path.IsEmpty()
        || ((path.PeekBuffer()[0] == SEPARATOR_W) && (path.PeekBuffer()[1] != SEPARATOR_W));
#else /* _WIN32 */
    return !path.StartsWith(SEPARATOR_W);
#endif /* _WIN32 */
}
Пример #3
0
/*
 * vislib::sys::Path::Canonicalise
 */
vislib::StringW vislib::sys::Path::Canonicalise(const StringW& path) {
    const StringW DOUBLE_SEPARATOR(Path::SEPARATOR_W, 2);

#ifdef _WIN32
    StringW retval;

    if (::PathCanonicalizeW(retval.AllocateBuffer(MAX_PATH), path) != TRUE) {
        throw SystemException(__FILE__, __LINE__);
    }

    retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_W);
    retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_W);

    /* Ensure that a UNC path remains a UNC path. */
    if (path.StartsWith(DOUBLE_SEPARATOR)) {
        // Note: Double separator replacement above leaves at least one 
        // separator, so we must only prepend one additional one.
        retval.Prepend(SEPARATOR_W);
    }

    return retval;

#else /* _WIN32 */
    const wchar_t *BACK_REF = L"/..";
    const wchar_t *CUR_REF = L"/.";         // Note: "./" does not work
    StringW::Size BACK_REF_LEN = ::wcslen(BACK_REF);
    StringW::Size bwRefPos = 0;             // Position of back reference.
    StringW::Size remDirPos = 0;            // Position of directory to erase.
    StringW retval(path);
    

    /* Remove backward references, first. */
    while ((bwRefPos = retval.Find(BACK_REF)) != StringW::INVALID_POS) {

        if ((bwRefPos > 0) 
                && (remDirPos = retval.FindLast(SEPARATOR_W, bwRefPos - 1))
                != StringW::INVALID_POS) {
            /* Found inner backward reference, so remove some parts. */
            retval.Remove(remDirPos, bwRefPos - remDirPos + BACK_REF_LEN);

        } else {
            /* 
             * No other path separator is before this one, so we can remove
             * everything before 'bwRefPos'.
             */
            retval.Remove(0, bwRefPos + BACK_REF_LEN);
        }
    }

    /*
     * Remove references to the current directory. This must be done after
     * removing backward references.
     */
    retval.Remove(CUR_REF);
    
    /* Remove odd and even number of repeated path separators. */
    retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_W);
    retval.Replace(DOUBLE_SEPARATOR.PeekBuffer(), SEPARATOR_W);

    return retval;
#endif /* _WIN32 */
}