home *** CD-ROM | disk | FTP | other *** search
- /* This is part of libio/iostream, providing -*- C++ -*- input/output.
- Copyright (C) 1993 Free Software Foundation
-
- This file is part of the GNU IO Library. This library is free
- software; you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- As a special exception, if you link this library with files
- compiled with a GNU compiler to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
- /* Written by Per Bothner (bothner@cygnus.com). */
-
- #ifdef __GNUG__
- #pragma implementation
- #endif
- #include "iostreamP.h"
- #include "strstream.h"
- #include <string.h>
-
- static void* default_alloc(_IO_size_t size)
- {
- return (void*)new char[size];
- }
-
- static void default_free(void* ptr)
- {
- delete [] (char*)ptr;
- }
-
- /* Set to use the _IO_str_jump jumptable, for efficiency */
-
- #define SET_STR_JUMPS(STRBUF) \
- (STRBUF)->_jumps = &_IO_str_jumps,\
- (STRBUF)->_vtable() = NULL;
-
- istrstream::istrstream(const char *cp, int n)
- {
- init(new strstreambuf(cp, n));
- SET_STR_JUMPS(_strbuf);
- }
-
- ostrstream::ostrstream()
- {
- init(new strstreambuf());
- SET_STR_JUMPS(_strbuf);
- }
-
- strstreambase::strstreambase(char *cp, int n, int mode)
- {
- char *pstart;
- if (mode == ios::app || mode == ios::ate)
- pstart = cp + strlen(cp);
- else
- pstart = cp;
- init(new strstreambuf(cp, n, pstart));
- SET_STR_JUMPS(_strbuf);
- }
-
- char *strstreambuf::str()
- {
- freeze(1);
- return base();
- }
-
- _IO_ssize_t strstreambuf::pcount() { return _IO_str_count (this); }
-
- int strstreambuf::overflow(int c /* = EOF */)
- {
- return _IO_str_overflow (this, c);
- }
-
- int strstreambuf::underflow()
- {
- return _IO_str_underflow(this);
- }
-
-
- void strstreambuf::init_dynamic(_IO_alloc_type alloc, _IO_free_type free,
- int initial_size)
-
- {
- _s._len = 0;
- if (initial_size < 16)
- initial_size = 16;
- _s._allocate_buffer = alloc ? alloc : default_alloc;
- _s._free_buffer = free ? free : default_free;
- char * buf = (char*)(*_s._allocate_buffer)(initial_size);
- setb(buf, buf + initial_size, 1);
- setp(buf, buf + initial_size);
- setg(buf, buf, buf);
- }
-
- void strstreambuf::init_static(char *ptr, int size, char *pstart)
- {
- _IO_str_init_static (this, ptr, size, pstart);
- }
-
- void strstreambuf::init_readonly (const char *ptr, int size)
- {
- _IO_str_init_readonly (this, ptr, size);
- }
-
- strstreambuf::~strstreambuf()
- {
- if (_IO_buf_base && !(_flags & _IO_USER_BUF))
- (_s._free_buffer)(_IO_buf_base);
- _IO_buf_base = NULL;
- }
-
- streampos strstreambuf::seekoff(streamoff off, _seek_dir dir,
- int mode /*=ios::in|ios::out*/)
- {
- return _IO_str_seekoff (this, off, convert_to_seekflags(dir, mode));
- }
-
- int strstreambuf::pbackfail(int c)
- {
- return _IO_str_pbackfail (this, c);
- }
-