106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
// This is part of the iostream library, providing -*- C++ -*- input/output.
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// Copyright (C) 1991 Per Bothner.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free
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// Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id: strstream.h,v 1.3 1993/08/02 17:22:42 mycroft Exp $
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#ifndef __STRSTREAM_H
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#define __STRSTREAM_H
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include <iostream.h>
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class strstreambuf : public backupbuf {
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_G_size_t _len; // The current length is max(_len, _pptr-_pbase).
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typedef void *(*_alloc_type)(_G_size_t);
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typedef void (*_free_type)(void*);
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_alloc_type _allocate_buffer;
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_free_type _free_buffer;
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void init_dynamic(_alloc_type alloc, _free_type free,
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int initial_size = 128);
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void init_static(char *ptr, int size, char *pstart);
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void init_static(const char *ptr, int size);
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protected:
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int is_static() const { return _allocate_buffer == (_alloc_type)0; }
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virtual int overflow(int = EOF);
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virtual int underflow();
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virtual int pbackfail(int c);
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public:
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virtual ~strstreambuf();
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strstreambuf() { init_dynamic(0, 0); }
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strstreambuf(int initial_size) { init_dynamic(0, 0, initial_size); }
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strstreambuf(void *(*alloc)(_G_size_t), void (*free)(void*))
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{ init_dynamic(alloc, free); }
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strstreambuf(char *ptr, int size, char *pstart = NULL)
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{ init_static(ptr, size, pstart); }
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strstreambuf(unsigned char *ptr, int size, unsigned char *pstart = NULL)
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{ init_static((char*)ptr, size, (char*)pstart); }
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strstreambuf(const char *ptr, int size)
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{ init_static(ptr, size); }
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strstreambuf(const unsigned char *ptr, int size)
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{ init_static((const char*)ptr, size); }
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#ifndef _G_BROKEN_SIGNED_CHAR
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strstreambuf(signed char *ptr, int size, signed char *pstart = NULL)
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{ init_static((char*)ptr, size, (char*)pstart); }
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strstreambuf(const signed char *ptr, int size)
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{ init_static((const char*)ptr, size); }
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#endif
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// Note: frozen() is always true if is_static().
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int frozen() { return _flags & _S_USER_BUF ? 1 : 0; }
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void freeze(int n=1)
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{ if (!is_static())
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{ if (n) _flags |= _S_USER_BUF; else _flags &= ~_S_USER_BUF; } }
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_G_size_t pcount();
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char *str();
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virtual streampos seekoff(streamoff, _seek_dir, int mode=ios::in|ios::out);
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};
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class strstreambase : virtual public ios {
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public:
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strstreambuf* rdbuf() { return (strstreambuf*)_strbuf; }
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protected:
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strstreambase() { }
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strstreambase(char *cp, int n, int mode=ios::out);
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};
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class istrstream : public strstreambase, public istream {
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public:
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istrstream(const char*, int=0);
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};
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class ostrstream : public strstreambase, public ostream {
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public:
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ostrstream();
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ostrstream(char *cp, int n, int mode=ios::out) :strstreambase(cp,n,mode){}
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_G_size_t pcount() { return ((strstreambuf*)_strbuf)->pcount(); }
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char *str() { return ((strstreambuf*)_strbuf)->str(); }
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void freeze(int n = 1) { ((strstreambuf*)_strbuf)->freeze(n); }
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int frozen() { return ((strstreambuf*)_strbuf)->frozen(); }
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};
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class strstream : public strstreambase, public iostream {
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public:
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strstream() : strstreambase() { init(new strstreambuf()); }
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strstream(char *cp, int n, int mode=ios::out) :strstreambase(cp,n,mode){}
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_G_size_t pcount() { return ((strstreambuf*)_strbuf)->pcount(); }
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char *str() { return ((strstreambuf*)_strbuf)->str(); }
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void freeze(int n = 1) { ((strstreambuf*)_strbuf)->freeze(n); }
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int frozen() { return ((strstreambuf*)_strbuf)->frozen(); }
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};
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#endif /*!__STRSTREAM_H*/
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