/*
* Copyright (c) 1999
* Silicon Graphics Computer Systems, Inc.
*
* Copyright (c) 1999
* Boris Fomitchev
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
// This header defines classes basic_stringbuf, basic_istringstream,
// basic_ostringstream, and basic_stringstream. These classes
// represent streamsbufs and streams whose sources or destinations are
// C++ strings.
#ifndef _STLP_INTERNAL_SSTREAM
#define _STLP_INTERNAL_SSTREAM
#ifndef _STLP_INTERNAL_STREAMBUF
# include <stl/_streambuf.h>
#endif
#ifndef _STLP_INTERNAL_ISTREAM
# include <stl/_istream.h> // Includes <ostream>, <ios>, <iosfwd>
#endif
#ifndef _STLP_INTERNAL_STRING_H
# include <stl/_string.h>
#endif
_STLP_BEGIN_NAMESPACE
//----------------------------------------------------------------------
// This version of basic_stringbuf relies on the internal details of
// basic_string. It relies on the fact that, in this implementation,
// basic_string's iterators are pointers. It also assumes (as allowed
// by the standard) that _CharT is a POD type.
// We have a very small buffer for the put area, just so that we don't
// have to use append() for every sputc. Conceptually, the buffer
// immediately follows the end of the underlying string. We use this
// buffer when appending to write-only streambufs, but we don't use it
// for read-write streambufs.
template <class _CharT, class _Traits, class _Alloc>
class basic_stringbuf : public basic_streambuf<_CharT, _Traits> {
public: // Typedefs.
typedef _CharT char_type;
typedef typename _Traits::int_type int_type;
typedef typename _Traits::pos_type pos_type;
typedef typename _Traits::off_type off_type;
typedef _Traits traits_type;
typedef basic_streambuf<_CharT, _Traits> _Base;
typedef basic_stringbuf<_CharT, _Traits, _Alloc> _Self;
typedef basic_string<_CharT, _Traits, _Alloc> _String;
public: // Constructors, destructor.
explicit basic_stringbuf(ios_base::openmode __mode
= ios_base::in | ios_base::out);
explicit basic_stringbuf(const _String& __s, ios_base::openmode __mode
= ios_base::in | ios_base::out);
virtual ~basic_stringbuf(){}
public: // Get or set the string.
_String str() const { _M_append_buffer(); return _M_str; }
void str(const _String& __s);
protected: // Overridden virtual member functions.
// Precondition: gptr() >= egptr(). Returns a character, if one is available.
virtual int_type underflow() {
return this->gptr() != this->egptr()
? _Traits::to_int_type(*this->gptr())
: _Traits::eof();
}
virtual int_type uflow() {
if (this->gptr() != this->egptr()) {
int_type __c = _Traits::to_int_type(*this->gptr());
this->gbump(1);
return __c;
}
else
return _Traits::eof();
}
virtual int_type pbackfail(int_type __c) {
if (this->gptr() != this->eback()) {
if (!_Traits::eq_int_type(__c, _Traits::eof())) {
if (_Traits::eq(_Traits::to_char_type(__c), this->gptr()[-1])) {
this->gbump(-1);
return __c;
}
else if (_M_mode & ios_base::out) {
this->gbump(-1);
*this->gptr() = _Traits::to_char_type(__c);
return __c;
}
else
return _Traits::eof();
}
else {
this->gbump(-1);
return _Traits::not_eof(__c);
}
}
else
return _Traits::eof();
}
virtual int_type overflow(int_type __c) {
// fbp : reverse order of "ifs" to pass Dietmar's test.
// Apparently, standard allows overflow with eof even for read-only streams.
if (!_Traits::eq_int_type(__c, _Traits::eof())) {
if (_M_mode & ios_base::out) {
if (!(_M_mode & ios_base::in)) {
// It's a write-only streambuf, so we can use special append buffer.
if (this->pptr() == this->epptr())
this->_M_append_buffer();
if (this->pptr() != this->epptr()) {
*this->pptr() = _Traits::to_char_type(__c);
this->pbump(1);
return __c;
}
else
return _Traits::eof();
}
else {
// We're not using a special append buffer, just the string itself.
if (this->pptr() == this->epptr()) {
ptrdiff_t __offset = this->gptr() - this->eback();
_M_str.push_back(_Traits::to_char_type(__c));
_CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data());
size_t __data_size = _M_str.size();
this->setg(__data_ptr, __data_ptr + __offset, __data_ptr+__data_size);
this->setp(__data_ptr, __data_ptr + __data_size);
this->pbump((int)__data_size);
return __c;
}
else {
*this->pptr() = _Traits::to_char_type(__c);
this->pbump(1);
return __c;
}
}
}
else // Overflow always fails if it's read-only
return _Traits::eof();
}
else // __c is EOF, so we don't have to do anything
return _Traits::not_eof(__c);
}
int_type pbackfail() {return pbackfail(_Traits::eof());}
int_type overflow() {return overflow(_Traits::eof());}
virtual streamsize xsputn(const char_type* __s, streamsize __n) {
streamsize __nwritten = 0;
if ((_M_mode & ios_base::out) && __n > 0) {
// If the put pointer is somewhere in the middle of the string,
// then overwrite instead of append.
if (this->pbase() == _M_str.data() ) {
ptrdiff_t __avail = _M_str.data() + _M_str.size() - this->pptr();
if (__avail > __n) {
_Traits::copy(this->pptr(), __s, __STATIC_CAST(size_t, __n));
this->pbump((int)__n);
return __n;
}
else {
_Traits::copy(this->pptr(), __s, __avail);
__nwritten += __avail;
__n -= __avail;
__s += __avail;
this->setp(_M_Buf, _M_Buf + __STATIC_CAST(int,_S_BufSiz));
}
}
// At this point we know we're appending.
if (_M_mode & ios_base::in) {
ptrdiff_t __get_offset = this->gptr() - this->eback();
_M_str.append(__s, __s + __STATIC_CAST(ptrdiff_t, __n));
_CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data());
size_t __data_size = _M_str.size();
this->setg(__data_ptr, __data_ptr + __get_offset, __data_ptr + __data_size);
this->setp(__data_ptr, __data_ptr + __data_size);
this->pbump((int)__data_size);
}
else {
_M_append_buffer();
_M_str.append(__s, __s + __STATIC_CAST(ptrdiff_t, __n));
}
__nwritten += __n;
}
return __nwritten;
}
virtual streamsize _M_xsputnc(char_type __c, streamsize __n) {
streamsize __nwritten = 0;
if ((_M_mode & ios_base::out) && __n > 0) {
// If the put pointer is somewhere in the middle of the string,
// then overwrite instead of append.
if (this->pbase() == _M_str.data()) {
ptrdiff_t __avail = _M_str.data() + _M_str.size() - this->pptr();
if (__avail > __n) {
_Traits::assign(this->pptr(), __STATIC_CAST(size_t, __n), __c);
this->pbump(__STATIC_CAST(int, __n));
return __n;
}
else {
_Traits::assign(this->pptr(), __avail, __c);
__nwritten += __avail;
__n -= __avail;
this->setp(_M_Buf, _M_Buf + __STATIC_CAST(int,_S_BufSiz));
}
}
// At this point we know we're appending.
size_t __app_size = sizeof(streamsize) > sizeof(size_t) ? __STATIC_CAST(size_t, (min)(__n, __STATIC_CAST(streamsize, _M_str.max_size())))
: __STATIC_CAST(size_t, __n);
if (this->_M_mode & ios_base::in) {
ptrdiff_t __get_offset = this->gptr() - this->eback();
_M_str.append(__app_size, __c);
_CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data());
size_t __data_size = _M_str.size();
this->setg(__data_ptr, __data_ptr + __get_offset, __data_ptr + __data_size);
this->setp(__data_ptr, __data_ptr + __data_size);
this->pbump((int)__data_size);
}
else {
_M_append_buffer();
_M_str.append(__app_size, __c);
}
__nwritten += __app_size;
}
return __nwritten;
}
virtual _Base* setbuf(_CharT*, streamsize __n) {
if (__n > 0) {
bool __do_get_area = false;
bool __do_put_area = false;
ptrdiff_t __offg = 0;
ptrdiff_t __offp = 0;
if (this->pbase() == _M_str.data()) {
__do_put_area = true;
__offp = this->pptr() - this->pbase();
}
if (this->eback() == _M_str.data()) {
__do_get_area = true;
__offg = this->gptr() - this->eback();
}
if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
_M_append_buffer();
_M_str.reserve(sizeof(streamsize) > sizeof(size_t) ? __STATIC_CAST(size_t, (min)(__n, __STATIC_CAST(streamsize, _M_str.max_size())))
: __STATIC_CAST(size_t, __n));
_CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data());
size_t __data_size = _M_str.size();
if (__do_get_area) {
this->setg(__data_ptr, __data_ptr + __offg, __data_ptr + __data_size);
}
if (__do_put_area) {
this->setp(__data_ptr, __data_ptr + __data_size);
this->pbump((int)__offp);
}
}
return this;
}
virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
ios_base::openmode __mode
= ios_base::in | ios_base::out) {
__mode &= _M_mode;
bool __imode = (__mode & ios_base::in) != 0;
bool __omode = (__mode & ios_base::out) != 0;
if ( !(__imode || __omode) )
return pos_type(off_type(-1));
if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) )
return pos_type(off_type(-1));
#ifndef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT
if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
_M_append_buffer();
#endif
streamoff __newoff;
switch(__dir) {
case ios_base::beg:
__newoff = 0;
break;
case ios_base::end:
__newoff = _M_str.size();
break;
case ios_base::cur:
__newoff = __imode ? this->gptr() - this->eback() : this->pptr() - this->pbase();
#ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT
if ( __off == 0 ) {
return pos_type(__newoff);
}
#endif
break;
default:
return pos_type(off_type(-1));
}
__off += __newoff;
#ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT
_CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data());
size_t __data_size = _M_str.size();
#endif
if (__imode) {
ptrdiff_t __n = this->egptr() - this->eback();
if (__off < 0 || __off > __n)
return pos_type(off_type(-1));
this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __off),
this->eback() + __STATIC_CAST(ptrdiff_t, __n));
}
if (__omode) {
ptrdiff_t __n = this->epptr() - this->pbase();
if (__off < 0 || __off > __n)
return pos_type(off_type(-1));
#ifdef SYMBIAN_OE_ENHANCED_LOCALE_SUPPORT
this->setp(__data_ptr, __data_ptr+__data_size);
#else
this->setp(this->pbase(), this->pbase() + __n);
#endif
this->pbump((int)__off);
}
return pos_type(__off);
}
virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
= ios_base::in | ios_base::out) {
__mode &= _M_mode;
bool __imode = (__mode & ios_base::in) != 0;
bool __omode = (__mode & ios_base::out) != 0;
if ( !(__imode || __omode) )
return pos_type(off_type(-1));
if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) )
return pos_type(off_type(-1));
const off_type __n = __pos - pos_type(off_type(0));
if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
_M_append_buffer();
if (__imode) {
if (__n < 0 || __n > this->egptr() - this->eback())
return pos_type(off_type(-1));
this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __n), this->egptr());
}
if (__omode) {
if (__n < 0 || size_t(__n) > _M_str.size())
return pos_type(off_type(-1));
_CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data());
size_t __data_size = _M_str.size();
this->setp(__data_ptr, __data_ptr+__data_size);
this->pbump((int)__n);
}
return __pos;
}
private: // Helper functions.
// Append the internal buffer to the string if necessary.
void _M_append_buffer() const;
void _M_set_ptrs();
private:
ios_base::openmode _M_mode;
mutable basic_string<_CharT, _Traits, _Alloc> _M_str;
enum _JustName { _S_BufSiz = 8 };
_CharT _M_Buf[ 8 /* _S_BufSiz */];
};
#if defined (_STLP_USE_TEMPLATE_EXPORT)
_STLP_EXPORT_TEMPLATE_CLASS basic_stringbuf<char, char_traits<char>, allocator<char> >;
# if !defined (_STLP_NO_WCHAR_T)
_STLP_EXPORT_TEMPLATE_CLASS basic_stringbuf<wchar_t, char_traits<wchar_t>, allocator<wchar_t> >;
# endif
#endif /* _STLP_USE_TEMPLATE_EXPORT */
//----------------------------------------------------------------------
// Class basic_istringstream, an input stream that uses a stringbuf.
template <class _CharT, class _Traits, class _Alloc>
class basic_istringstream : public basic_istream<_CharT, _Traits> {
public: // Typedefs
typedef typename _Traits::char_type char_type;
typedef typename _Traits::int_type int_type;
typedef typename _Traits::pos_type pos_type;
typedef typename _Traits::off_type off_type;
typedef _Traits traits_type;
typedef basic_ios<_CharT, _Traits> _Basic_ios;
typedef basic_istream<_CharT, _Traits> _Base;
typedef basic_string<_CharT, _Traits, _Alloc> _String;
typedef basic_stringbuf<_CharT, _Traits, _Alloc> _Buf;
public: // Constructors, destructor.
basic_istringstream(ios_base::openmode __mode = ios_base::in);
basic_istringstream(const _String& __str,
ios_base::openmode __mode = ios_base::in);
~basic_istringstream(){}
public: // Member functions
basic_stringbuf<_CharT, _Traits, _Alloc>* rdbuf() const
{ return __CONST_CAST(_Buf*,&_M_buf); }
_String str() const { return _M_buf.str(); }
void str(const _String& __s) { _M_buf.str(__s); }
private:
basic_stringbuf<_CharT, _Traits, _Alloc> _M_buf;
#if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310)
typedef basic_istringstream<_CharT, _Traits> _Self;
//explicitely defined as private to avoid warnings:
basic_istringstream(_Self const&);
_Self& operator = (_Self const&);
#endif
};
//----------------------------------------------------------------------
// Class basic_ostringstream, an output stream that uses a stringbuf.
template <class _CharT, class _Traits, class _Alloc>
class basic_ostringstream : public basic_ostream<_CharT, _Traits> {
public: // Typedefs
typedef typename _Traits::char_type char_type;
typedef typename _Traits::int_type int_type;
typedef typename _Traits::pos_type pos_type;
typedef typename _Traits::off_type off_type;
typedef _Traits traits_type;
typedef basic_ios<_CharT, _Traits> _Basic_ios;
typedef basic_ostream<_CharT, _Traits> _Base;
typedef basic_string<_CharT, _Traits, _Alloc> _String;
typedef basic_stringbuf<_CharT, _Traits, _Alloc> _Buf;
public: // Constructors, destructor.
basic_ostringstream(ios_base::openmode __mode = ios_base::out);
basic_ostringstream(const _String& __str,
ios_base::openmode __mode = ios_base::out);
~basic_ostringstream(){}
public: // Member functions.
basic_stringbuf<_CharT, _Traits, _Alloc>* rdbuf() const
{ return __CONST_CAST(_Buf*,&_M_buf); }
_String str() const { return _M_buf.str(); }
void str(const _String& __s) { _M_buf.str(__s); } // dwa 02/07/00 - BUG STOMPER DAVE
private:
basic_stringbuf<_CharT, _Traits, _Alloc> _M_buf;
#if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310)
typedef basic_ostringstream<_CharT, _Traits> _Self;
//explicitely defined as private to avoid warnings:
basic_ostringstream(_Self const&);
_Self& operator = (_Self const&);
#endif
};
//----------------------------------------------------------------------
// Class basic_stringstream, a bidirectional stream that uses a stringbuf.
template <class _CharT, class _Traits, class _Alloc>
class basic_stringstream : public basic_iostream<_CharT, _Traits> {
public: // Typedefs
typedef typename _Traits::char_type char_type;
typedef typename _Traits::int_type int_type;
typedef typename _Traits::pos_type pos_type;
typedef typename _Traits::off_type off_type;
typedef _Traits traits_type;
typedef basic_ios<_CharT, _Traits> _Basic_ios;
typedef basic_iostream<_CharT, _Traits> _Base;
typedef basic_string<_CharT, _Traits, _Alloc> _String;
typedef basic_stringbuf<_CharT, _Traits, _Alloc> _Buf;
typedef ios_base::openmode openmode;
public: // Constructors, destructor.
basic_stringstream(openmode __mod = ios_base::in | ios_base::out);
basic_stringstream(const _String& __str,
openmode __mod = ios_base::in | ios_base::out);
~basic_stringstream(){}
public: // Member functions.
basic_stringbuf<_CharT, _Traits, _Alloc>* rdbuf() const
{ return __CONST_CAST(_Buf*,&_M_buf); }
_String str() const { return _M_buf.str(); }
void str(const _String& __s) { _M_buf.str(__s); }
private:
basic_stringbuf<_CharT, _Traits, _Alloc> _M_buf;
#if defined (_STLP_MSVC) && (_STLP_MSVC >= 1300 && _STLP_MSVC <= 1310)
typedef basic_stringstream<_CharT, _Traits> _Self;
//explicitely defined as private to avoid warnings:
basic_stringstream(_Self const&);
_Self& operator = (_Self const&);
#endif
};
#if defined (_STLP_USE_TEMPLATE_EXPORT)
_STLP_EXPORT_TEMPLATE_CLASS basic_istringstream<char, char_traits<char>, allocator<char> >;
_STLP_EXPORT_TEMPLATE_CLASS basic_ostringstream<char, char_traits<char>, allocator<char> >;
_STLP_EXPORT_TEMPLATE_CLASS basic_stringstream<char, char_traits<char>, allocator<char> >;
# if !defined (_STLP_NO_WCHAR_T)
_STLP_EXPORT_TEMPLATE_CLASS basic_istringstream<wchar_t, char_traits<wchar_t>, allocator<wchar_t> >;
_STLP_EXPORT_TEMPLATE_CLASS basic_ostringstream<wchar_t, char_traits<wchar_t>, allocator<wchar_t> >;
_STLP_EXPORT_TEMPLATE_CLASS basic_stringstream<wchar_t, char_traits<wchar_t>, allocator<wchar_t> >;
# endif
#endif /* _STLP_USE_TEMPLATE_EXPORT */
_STLP_END_NAMESPACE
#if defined (_STLP_EXPOSE_STREAM_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)
# include <stl/_sstream.c>
#endif
#endif /* _STLP_INTERNAL_SSTREAM */
// Local Variables:
// mode:C++
// End: