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CMake/Source/kwsys/FStream.hxx.in

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/*============================================================================
KWSys - Kitware System Library
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#ifndef @KWSYS_NAMESPACE@_FStream_hxx
#define @KWSYS_NAMESPACE@_FStream_hxx
#include <@KWSYS_NAMESPACE@/Configure.hxx>
#include <@KWSYS_NAMESPACE@/Encoding.hxx>
#include <fstream>
#if defined(_WIN32)
# if !defined(_MSC_VER) && @KWSYS_NAMESPACE@_CXX_HAS_EXT_STDIO_FILEBUF_H
# include <ext/stdio_filebuf.h>
# endif
#endif
namespace @KWSYS_NAMESPACE@
{
#if defined(_WIN32) && (defined(_MSC_VER) || @KWSYS_NAMESPACE@_CXX_HAS_EXT_STDIO_FILEBUF_H)
# if defined(_NOEXCEPT)
# define @KWSYS_NAMESPACE@_FStream_NOEXCEPT _NOEXCEPT
# else
# define @KWSYS_NAMESPACE@_FStream_NOEXCEPT
# endif
#if defined(_MSC_VER)
template<typename CharType,typename Traits>
class basic_filebuf : public std::basic_filebuf<CharType,Traits>
{
# if _MSC_VER >= 1400
public:
typedef std::basic_filebuf<CharType,Traits> my_base_type;
basic_filebuf *open(char const *s,std::ios_base::openmode mode)
{
const std::wstring wstr = Encoding::ToWide(s);
return static_cast<basic_filebuf*>(
my_base_type::open(wstr.c_str(), mode)
);
}
# endif
};
#else
inline std::wstring getcmode(const std::ios_base::openmode mode) {
std::wstring cmode;
bool plus = false;
if (mode & std::ios_base::app) {
cmode += L"a";
plus = mode & std::ios_base::in ? true : false;
} else if (mode & std::ios_base::trunc ||
(mode & std::ios_base::out && (mode & std::ios_base::in) == 0)) {
cmode += L"w";
plus = mode & std::ios_base::in ? true : false;
} else {
cmode += L"r";
plus = mode & std::ios_base::out ? true : false;
}
if (plus) {
cmode += L"+";
}
if (mode & std::ios_base::binary) {
cmode += L"b";
} else {
cmode += L"t";
}
return cmode;
};
#endif
template<typename CharType,typename Traits = std::char_traits<CharType> >
class basic_efilebuf
{
public:
#if defined(_MSC_VER)
typedef basic_filebuf<CharType,Traits> internal_buffer_type;
#else
typedef __gnu_cxx::stdio_filebuf<CharType,Traits> internal_buffer_type;
#endif
basic_efilebuf() : file_(0)
{
buf_ = 0;
}
bool _open(char const *file_name,std::ios_base::openmode mode)
{
if (is_open() || file_) {
return false;
}
#if defined(_MSC_VER)
const bool success = buf_->open(file_name,mode) != 0;
#else
const std::wstring wstr = Encoding::ToWide(file_name);
bool success = false;
std::wstring cmode = getcmode(mode);
file_ = _wfopen(wstr.c_str(), cmode.c_str());
if (file_) {
if (buf_) {
delete buf_;
}
buf_ = new internal_buffer_type(file_, mode);
success = true;
}
#endif
return success;
}
bool is_open()
{
if (!buf_) {
return false;
}
return buf_->is_open();
}
bool is_open() const
{
if (!buf_) {
return false;
}
return buf_->is_open();
}
bool _close()
{
bool success = false;
if (buf_) {
success = buf_->close() != 0;
#if !defined(_MSC_VER)
if (file_) {
success = fclose(file_) == 0 ? success : false;
file_ = 0;
}
#endif
}
return success;
}
static void _set_state(bool success, std::basic_ios<CharType,Traits> *ios, basic_efilebuf* efilebuf)
{
#if !defined(_MSC_VER)
ios->rdbuf(efilebuf->buf_);
#endif
if (!success) {
ios->setstate(std::ios_base::failbit);
} else {
ios->clear();
}
}
~basic_efilebuf()
{
if (buf_) {
delete buf_;
}
}
protected:
internal_buffer_type* buf_;
FILE *file_;
};
template<typename CharType,typename Traits = std::char_traits<CharType> >
class basic_ifstream : public std::basic_istream<CharType,Traits>,
public basic_efilebuf<CharType,Traits>
{
using basic_efilebuf<CharType,Traits>::is_open;
public:
typedef typename basic_efilebuf<CharType, Traits>::internal_buffer_type internal_buffer_type;
typedef std::basic_istream<CharType,Traits> internal_stream_type;
basic_ifstream() : internal_stream_type(new internal_buffer_type())
{
this->buf_ = static_cast<internal_buffer_type *>(internal_stream_type::rdbuf());
}
explicit basic_ifstream(char const *file_name,
std::ios_base::openmode mode = std::ios_base::in)
: internal_stream_type(new internal_buffer_type())
{
this->buf_ = static_cast<internal_buffer_type *>(internal_stream_type::rdbuf());
open(file_name,mode);
}
void open(char const *file_name,std::ios_base::openmode mode = std::ios_base::in)
{
mode = mode | std::ios_base::in;
this->_set_state(this->_open(file_name, mode), this, this);
}
void close()
{
this->_set_state(this->_close(), this, this);
}
internal_buffer_type *rdbuf() const
{
return this->buf_;
}
~basic_ifstream() @KWSYS_NAMESPACE@_FStream_NOEXCEPT
{
close();
}
};
template<typename CharType,typename Traits = std::char_traits<CharType> >
class basic_ofstream : public std::basic_ostream<CharType,Traits>,
public basic_efilebuf<CharType,Traits>
{
using basic_efilebuf<CharType,Traits>::is_open;
public:
typedef typename basic_efilebuf<CharType, Traits>::internal_buffer_type internal_buffer_type;
typedef std::basic_ostream<CharType,Traits> internal_stream_type;
basic_ofstream() : internal_stream_type(new internal_buffer_type())
{
this->buf_ = static_cast<internal_buffer_type *>(internal_stream_type::rdbuf());
}
explicit basic_ofstream(char const *file_name,std::ios_base::openmode mode = std::ios_base::out) :
internal_stream_type(new internal_buffer_type())
{
this->buf_ = static_cast<internal_buffer_type *>(internal_stream_type::rdbuf());
open(file_name,mode);
}
void open(char const *file_name,std::ios_base::openmode mode = std::ios_base::out)
{
mode = mode | std::ios_base::out;
this->_set_state(this->_open(file_name, mode), this, this);
}
void close()
{
this->_set_state(this->_close(), this, this);
}
internal_buffer_type *rdbuf() const
{
return this->buf_;
}
~basic_ofstream() @KWSYS_NAMESPACE@_FStream_NOEXCEPT
{
close();
}
};
typedef basic_ifstream<char> ifstream;
typedef basic_ofstream<char> ofstream;
# undef @KWSYS_NAMESPACE@_FStream_NOEXCEPT
#else
using std::ofstream;
using std::ifstream;
#endif
namespace FStream
{
enum BOM
{
BOM_None,
BOM_UTF8,
BOM_UTF16BE,
BOM_UTF16LE,
BOM_UTF32BE,
BOM_UTF32LE
};
// Read a BOM, if one exists.
// If a BOM exists, the stream is advanced to after the BOM.
// This function requires a seekable stream (but not a relative
// seekable stream).
BOM ReadBOM(std::istream& in);
}
}
#endif
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