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Re: next snapshot update
- To: Benjamin Kosnik <bkoz at cygnus dot com>
- Subject: Re: next snapshot update
- From: Kevin Atkinson <kevinatk at home dot com>
- Date: Thu, 2 Mar 2000 19:30:22 -0500 (EST)
- cc: libstdc++ at sourceware dot cygnus dot com
On Thu, 2 Mar 2000, Benjamin Kosnik wrote:
>
> > How about include strstream from SGI stdlib.
> > http://www.sgi.com/Technology/STL/standard_library.html.
>
> how about making it so obvious that all I have to do is
>
> patch < p.kevin_atkinson
>
> ?
Are you trying to say you don't want to have to do any actual work? I
have never contributed anything to the libstdc++ library so I would really
not know what to do. Plus I don't have a couple of hours to waste on
figuring out what to do.
I have attached the necessary files since you seam to be unwilling to fetch
them yourself.
---
Kevin Atkinson
kevinatk@home.com
http://metalab.unc.edu/kevina/
/*
* Copyright (c) 1998
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
// WARNING: The classes defined in this header are DEPRECATED. This
// header is defined in section D.7.1 of the C++ standard, and it
// MAY BE REMOVED in a future standard revision. You should use the
// header <sstream> instead.
#ifndef __SGI_STL_STRSTREAM
#define __SGI_STL_STRSTREAM
#if defined(__sgi) && !defined(__GNUC__) && !defined(_STANDARD_C_PLUS_PLUS)
#error This header file requires the -LANG:std option
#endif
#include <istream> // Includes <ostream>, <ios>, <iosfwd>
#include <string>
__STL_BEGIN_NAMESPACE
//----------------------------------------------------------------------
// Class strstreambuf, a streambuf class that manages an array of char.
// Note that this class is not a template.
class strstreambuf : public basic_streambuf<char, char_traits<char> >
{
public: // Types.
typedef char_traits<char> _Traits;
typedef basic_streambuf<char, _Traits> _Base;
public: // Constructor, destructor
explicit strstreambuf(streamsize __initial_capacity = 0);
strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
strstreambuf(char* __get, streamsize __n, char* __put = 0);
strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);
strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);
strstreambuf(const char* __get, streamsize __n);
strstreambuf(const signed char* __get, streamsize __n);
strstreambuf(const unsigned char* __get, streamsize __n);
virtual ~strstreambuf();
public: // strstreambuf operations.
void freeze(bool = true);
char* str();
int pcount() const;
protected: // Overridden virtual member functions.
virtual int_type overflow(int_type __c = _Traits::eof());
virtual int_type pbackfail(int_type __c = _Traits::eof());
virtual int_type underflow();
virtual _Base* setbuf(char* __buf, streamsize __n);
virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
ios_base::openmode __mode
= ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
= ios_base::in | ios_base::out);
private: // Helper functions.
// Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
char* _M_alloc(size_t);
void _M_free(char*);
// Helper function used in constructors.
void _M_setup(char* __get, char* __put, streamsize __n);
private: // Data members.
void* (*_M_alloc_fun)(size_t);
void (*_M_free_fun)(void*);
bool _M_dynamic : 1;
bool _M_frozen : 1;
bool _M_constant : 1;
};
//----------------------------------------------------------------------
// Class istrstream, an istream that manages a strstreambuf.
class istrstream : public basic_istream<char>
{
public:
explicit istrstream(char*);
explicit istrstream(const char*);
istrstream(char* , streamsize);
istrstream(const char*, streamsize);
virtual ~istrstream();
strstreambuf* rdbuf() const;
char* str();
private:
strstreambuf _M_buf;
};
//----------------------------------------------------------------------
// Class ostrstream
class ostrstream : public basic_ostream<char>
{
public:
ostrstream();
ostrstream(char*, int, ios_base::openmode = ios_base::out);
virtual ~ostrstream();
strstreambuf* rdbuf() const;
void freeze(bool = true);
char* str();
int pcount() const;
private:
strstreambuf _M_buf;
};
//----------------------------------------------------------------------
// Class strstream
class strstream : public basic_iostream<char>
{
public:
typedef char char_type;
typedef char_traits<char>::int_type int_type;
typedef char_traits<char>::pos_type pos_type;
typedef char_traits<char>::off_type off_type;
strstream();
strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
virtual ~strstream();
strstreambuf* rdbuf() const;
void freeze(bool = true);
int pcount() const;
char* str();
private:
strstreambuf _M_buf;
};
__STL_END_NAMESPACE
#endif /* __SGI_STL_STRSTREAM */
// Local Variables:
// mode:C++
// End:
/*
* Copyright (c) 1998
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
// Implementation of the classes in header <strstream>.
// WARNING: The classes defined in <strstream> are DEPRECATED. This
// header is defined in section D.7.1 of the C++ standard, and it
// MAY BE REMOVED in a future standard revision. You should use the
// header <sstream> instead.
#include <strstream>
#include <algorithm>
#include <new>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
__STL_BEGIN_NAMESPACE
// strstreambuf constructor, destructor.
strstreambuf::strstreambuf(streamsize initial_capacity)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(true), _M_frozen(false), _M_constant(false)
{
streamsize n = max(initial_capacity, streamsize(16));
char* buf = _M_alloc(n);
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}
strstreambuf::strstreambuf(void* (*alloc_f)(size_t), void (*free_f)(void*))
: _Base(),
_M_alloc_fun(alloc_f), _M_free_fun(free_f),
_M_dynamic(true), _M_frozen(false), _M_constant(false)
{
streamsize n = 16;
char* buf = _M_alloc(n);
if (buf) {
setp(buf, buf + n);
setg(buf, buf, buf);
}
}
strstreambuf::strstreambuf(char* get, streamsize n, char* put)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(false)
{
_M_setup(get, put, n);
}
strstreambuf::strstreambuf(signed char* get, streamsize n, signed char* put)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(false)
{
_M_setup(reinterpret_cast<char*>(get), reinterpret_cast<char*>(put), n);
}
strstreambuf::strstreambuf(unsigned char* get, streamsize n,
unsigned char* put)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(false)
{
_M_setup(reinterpret_cast<char*>(get), reinterpret_cast<char*>(put), n);
}
strstreambuf::strstreambuf(const char* get, streamsize n)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(true)
{
_M_setup(const_cast<char*>(get), 0, n);
}
strstreambuf::strstreambuf(const signed char* get, streamsize n)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(true)
{
_M_setup(reinterpret_cast<char*>(const_cast<signed char*>(get)), 0, n);
}
strstreambuf::strstreambuf(const unsigned char* get, streamsize n)
: _Base(),
_M_alloc_fun(0), _M_free_fun(0),
_M_dynamic(false), _M_frozen(false), _M_constant(true)
{
_M_setup(reinterpret_cast<char*>(const_cast<unsigned char*>(get)), 0, n);
}
strstreambuf::~strstreambuf()
{
if (_M_dynamic && !_M_frozen)
_M_free(eback());
}
void strstreambuf::freeze(bool frozenflag)
{
if (_M_dynamic)
_M_frozen = frozenflag;
}
char* strstreambuf::str()
{
freeze(true);
return eback();
}
int strstreambuf::pcount() const
{
return pptr() ? pptr() - pbase() : 0;
}
strstreambuf::int_type strstreambuf::overflow(int_type c) {
if (c == traits_type::eof())
return traits_type::not_eof(c);
// Try to expand the buffer.
if (pptr() == epptr() && _M_dynamic && !_M_frozen && !_M_constant) {
ptrdiff_t old_size = epptr() - pbase();
ptrdiff_t new_size = max(2 * old_size, ptrdiff_t(1));
char* buf = _M_alloc(new_size);
if (buf) {
memcpy(buf, pbase(), old_size);
char* old_buffer = pbase();
bool reposition_get = false;
ptrdiff_t old_get_offset;
if (gptr() != 0) {
reposition_get = true;
old_get_offset = gptr() - eback();
}
setp(buf, buf + new_size);
pbump(old_size);
if (reposition_get)
setg(buf, buf + old_get_offset, buf + max(old_get_offset, old_size));
_M_free(old_buffer);
}
}
if (pptr() != epptr()) {
*pptr() = c;
pbump(1);
return c;
}
else
return traits_type::eof();
}
strstreambuf::int_type strstreambuf::pbackfail(int_type c)
{
if (gptr() != eback()) {
if (c == _Traits::eof()) {
gbump(-1);
return _Traits::not_eof(c);
}
else if (c == gptr()[-1]) {
gbump(-1);
return c;
}
else if (!_M_constant) {
gbump(-1);
*gptr() = c;
return c;
}
}
return _Traits::eof();
}
strstreambuf::int_type strstreambuf::underflow()
{
if (gptr() == egptr() && pptr() && pptr() > egptr())
setg(eback(), gptr(), pptr());
if (gptr() != egptr())
return (unsigned char) *gptr();
else
return _Traits::eof();
}
basic_streambuf<char, char_traits<char> >*
strstreambuf::setbuf(char*, streamsize)
{
return this;
}
strstreambuf::pos_type
strstreambuf::seekoff(off_type off,
ios_base::seekdir dir, ios_base::openmode mode)
{
bool do_get = false;
bool do_put = false;
if ((mode & (ios_base::in | ios_base::out)) ==
(ios_base::in | ios_base::out) &&
(dir == ios_base::beg || dir == ios_base::end))
do_get = do_put = true;
else if (mode & ios_base::in)
do_get = true;
else if (mode & ios_base::out)
do_put = true;
// !gptr() is here because, according to D.7.1 paragraph 4, the seekable
// area is undefined if there is no get area.
if ((!do_get && !do_put) || (do_put && !pptr()) || !gptr())
return pos_type(off_type(-1));
char* seeklow = eback();
char* seekhigh = epptr() ? epptr() : egptr();
off_type newoff;
switch(dir) {
case ios_base::beg:
newoff = 0;
break;
case ios_base::end:
newoff = seekhigh - seeklow;
break;
case ios_base::cur:
newoff = do_put ? pptr() - seeklow : gptr() - seeklow;
break;
default:
return pos_type(off_type(-1));
}
off += newoff;
if (off < 0 || off > seekhigh - seeklow)
return pos_type(off_type(-1));
if (do_put) {
if (seeklow + off < pbase()) {
setp(seeklow, epptr());
pbump(off);
}
else {
setp(pbase(), epptr());
pbump(off - (pbase() - seeklow));
}
}
if (do_get) {
if (off <= egptr() - seeklow)
setg(seeklow, seeklow + off, egptr());
else if (off <= pptr() - seeklow)
setg(seeklow, seeklow + off, pptr());
else
setg(seeklow, seeklow + off, epptr());
}
return pos_type(newoff);
}
strstreambuf::pos_type
strstreambuf::seekpos(pos_type pos, ios_base::openmode mode)
{
return seekoff(pos - pos_type(off_type(0)), ios_base::beg, mode);
}
char* strstreambuf::_M_alloc(size_t n)
{
if (_M_alloc_fun)
return static_cast<char*>(_M_alloc_fun(n));
else
return new char[n];
}
void strstreambuf::_M_free(char* p)
{
if (p)
if (_M_free_fun)
_M_free_fun(p);
else
delete[] p;
}
void strstreambuf::_M_setup(char* get, char* put, streamsize n)
{
if (get) {
size_t N = n > 0 ? size_t(n) : n == 0 ? strlen(get) : size_t(INT_MAX);
if (put) {
setg(get, get, put);
setp(put, put + N);
}
else {
setg(get, get, get + N);
}
}
}
//----------------------------------------------------------------------
// Class istrstream
istrstream::istrstream(char* s)
: basic_ios<char>(), basic_istream<char>(0), _M_buf(s, 0)
{
basic_ios<char>::init(&_M_buf);
}
istrstream::istrstream(const char* s)
: basic_ios<char>(), basic_istream<char>(0), _M_buf(s, 0)
{
basic_ios<char>::init(&_M_buf);
}
istrstream::istrstream(char* s, streamsize n)
: basic_ios<char>(), basic_istream<char>(0), _M_buf(s, n)
{
basic_ios<char>::init(&_M_buf);
}
istrstream::istrstream(const char* s, streamsize n)
: basic_ios<char>(), basic_istream<char>(0), _M_buf(s, n)
{
basic_ios<char>::init(&_M_buf);
}
istrstream::~istrstream() {}
strstreambuf* istrstream::rdbuf() const {
return const_cast<strstreambuf*>(&_M_buf);
}
char* istrstream::str() { return _M_buf.str(); }
//----------------------------------------------------------------------
// Class ostrstream
ostrstream::ostrstream()
: basic_ios<char>(), basic_ostream<char>(0), _M_buf()
{
basic_ios<char>::init(&_M_buf);
}
ostrstream::ostrstream(char* s, int n, ios_base::openmode mode)
: basic_ios<char>(), basic_ostream<char>(0),
_M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s)
{
basic_ios<char>::init(&_M_buf);
}
ostrstream::~ostrstream() {}
strstreambuf* ostrstream::rdbuf() const
{
return const_cast<strstreambuf*>(&_M_buf);
}
void ostrstream::freeze(bool freezeflag)
{
_M_buf.freeze(freezeflag);
}
char* ostrstream::str()
{
return _M_buf.str();
}
int ostrstream::pcount() const
{
return _M_buf.pcount();
}
//----------------------------------------------------------------------
// Class strstream
strstream::strstream()
: basic_ios<char>(), basic_iostream<char>(0), _M_buf()
{
basic_ios<char>::init(&_M_buf);
}
strstream::strstream(char* s, int n, ios_base::openmode mode)
: basic_ios<char>(), basic_iostream<char>(0),
_M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s)
{
basic_ios<char>::init(&_M_buf);
}
strstream::~strstream() {}
strstreambuf* strstream::rdbuf() const
{
return const_cast<strstreambuf*>(&_M_buf);
}
void strstream::freeze(bool freezeflag)
{
_M_buf.freeze(freezeflag);
}
int strstream::pcount() const
{
return _M_buf.pcount();
}
char* strstream::str()
{
return _M_buf.str();
}
__STL_END_NAMESPACE
// Local Variables:
// mode:C++
// End: