file_functions.hpp

新版本TR1的stl

                                            ,   processheap_allocator<char_2_type>
                                            ,   1024
                                            >                   buffer_t;

            buffer_t    buffer(static_cast<ss_typename_type_k buffer_t::size_type>(size));
            DWORD       dw;

            if(!::ReadFile(h.get(), &buffer[0], buffer.size(), &dw, NULL))
            {
                STLSOFT_THROW_X(windows_exception("Read operation failed", ::GetLastError()));
            }
            else
            {
                contents.assign(&buffer[0], dw);

                return size;
            }
        }
    }

    return 0;
}

#if !defined(STLSOFT_COMPILER_IS_DMC) && \
    !defined(STLSOFT_COMPILER_IS_MWERKS) && \
    (   !defined(STLSOFT_COMPILER_IS_MSVC) || \
        _MSC_VER != 1300)

template<   ss_typename_param_k S2
        >
inline ws_uint64_t load_text_file(ws_char_a_t const* fileName, S2 &contents)
{
    return load_text_file_impl<ws_char_a_t const*, S2>(fileName, contents);
}

template<   ss_typename_param_k S2
        >
inline ws_uint64_t load_text_file(ws_char_w_t const* fileName, S2 &contents)
{
    return load_text_file_impl<ws_char_w_t const*, S2>(fileName, contents);
}

#if 0
template<   ss_typename_param_k S2
        >
inline ws_uint64_t load_text_file(char fileName[], S2 &contents)
{
    return load_text_file_impl<ws_char_a_t const*, S2>(fileName, contents);
}

template<   ss_typename_param_k S2
        >
inline ws_uint64_t load_text_file(ws_char_w_t *fileName, S2 &contents)
{
    return load_text_file_impl<ws_char_w_t const*, S2>(fileName, contents);
}
#endif /* 0 */

#endif /* compiler */

#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

















#if 0
template<   ss_typename_param_k S
        >
struct trim_trailing_carriage_return
{
public:
    S operator ()(S const& s)
    {
        ss_size_t   len =   stlsoft_ns_qual(c_str_len)(s);

        if( len > 0 &&
            '\r' == s[len])
        {
            return s;
        }

        return S(stlsoft_ns_qual(c_str_ptr)(s), len - 1);
    }
};
#endif /* 0 */

template<   ss_typename_param_k CH
        ,   ss_typename_param_k C
        >
void readlines_impl(CH const* p, ss_size_t len, C &container)
{
    typedef CH                                  char_t;
    typedef ss_typename_type_k C::value_type    value_t;

    char_t const*   p0  =   p;
    char_t const*   p1  =   p0;
    char_t const*   end =   p + len;

    while(end != stlsoft_ns_qual(find_next_token)(p0, p1, end, static_cast<char_t>('\n')))
    {
        if( p1 > p0 &&
            '\r' == p1[-1])
        {
            --p1;
        }

        container.push_back(value_t(p0, static_cast<ws_size_t>(p1 - p0)));

        if('\r' == *p1)
        {
            ++p1;
        }
    }
}

/** \brief Reads the lines of a text-file into a sequence container
 *
 * \ingroup group__library__filesystem
 *
 * \param fileName The name of the text-file to load
 * \param container Reference to the sequence container to which each line
 *   read from \c fileName will be appended (via its push_back() method)
 *
 * \returns The \c container reference
 *
\code
std::vector<std::string>  lines;

winstl::readlines("mytextfile.ext", lines);
\endcode
 *
 *
 * \remarks The container type's <code>value_type</code> must provide
 *   a two-parameter constructor whose parameters types are
 *   <code>char_type const*</code> (where <code>char_type</code> is the
 *   <code>value_type</code> of the string type <code>S</code>) and
 *   <code>size_t</code>, indicating the pointer to the beginning and the
 *   length of the C-style string that represents the line read from the
 *   file denoted by <code>fileName</code>.
 *
 * \note When used with a compiler that does not support partial template
 *   specialisation, the use of string types for which explicit
 *   specialisations are not defined will fail. Hence, using
 *   <code>stlsoft::simple_string</code> (which is the specialisation
 *   <code>stlsoft::basic_simple_string&lt;char></code>) will succeed
 *   because a specialisation of <code>stlsoft::string_traits</code> exists
 *   for that type. The same applies for
 *   <code>stlsoft::simple_wstring</code>, <code>std::string</code> and
 *   <code>std::wstring</code>. However, if you attempt to use a
 *   specialisation of a string class template for which an explicit
 *   specialisation of <code>stlsoft::string_traits</code> does not exist
 *   then you will experience a compile-time error in the implementation
 *   of <code>winstl::load_text_file_impl()</code>. To correct this, you
 *   must either provide an explicit specialisation of
 *   <code>stlsoft::string_traits</code> for your type, or use a type for
 *   which a specialisation of <code>stlsoft::string_traits</code> does
 *   exist.<br><br>This problem does not occur for compilers that support
 *   partial template specialisation.
 */
template<   ss_typename_param_k S
        ,   ss_typename_param_k C
        >
C &readlines(S const& fileName, C &container)
{
    S   contents;
    S   delim;

    // NOTE: doing these as characters skips the issue of ANSI vs Unicode
    delim.append(1, '\n');

    load_text_file(fileName, contents);

#if 0
    stlsoft::string_tokeniser<  S /* stlsoft::basic_string_view<ss_typename_type_k stlsoft::string_traits<S>::char_type> */
                            ,   S
                            ,   stlsoft::string_tokeniser_ignore_blanks<false>
                            >           tokens(contents, delim);

    std::transform(tokens.begin(), tokens.end(), std::back_inserter(container), trim_trailing_carriage_return</* ss_typename_type_k */ C::value_type>());
#else /* ? 0 */

    readlines_impl(contents.c_str(), contents.size(), container);
#endif /* 0 */

    return container;
}


/* /////////////////////////////////////////////////////////////////////////
 * Unit-testing
 */

#ifdef STLSOFT_UNITTEST
# include "./unittest/file_functions_unittest_.h"
#endif /* STLSOFT_UNITTEST */

/* ////////////////////////////////////////////////////////////////////// */

#ifndef _WINSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
} // namespace winstl
# else
} // namespace winstl_project
} // namespace stlsoft
# endif /* _STLSOFT_NO_NAMESPACE */

#endif /* !_WINSTL_NO_NAMESPACE */

/* ////////////////////////////////////////////////////////////////////// */

#endif /* !WINSTL_INCL_WINSTL_FILESYSTEM_HPP_FILE_FUNCTIONS */

/* ////////////////////////////////////////////////////////////////////// */