mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-11-30 15:24:07 +08:00
117 lines
3.0 KiB
C++
117 lines
3.0 KiB
C++
/* 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 this library; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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;
|
|
}
|
|
|
|
istrstream::istrstream(const char *cp, int n)
|
|
{
|
|
__my_sb.init_readonly (cp, n);
|
|
}
|
|
|
|
strstreambase::strstreambase(char *cp, int n, int mode)
|
|
: __my_sb (cp, n,
|
|
(mode == ios::app || mode == ios::ate) ? cp + strlen(cp) : cp)
|
|
{
|
|
init (&__my_sb);
|
|
}
|
|
|
|
char *strstreambuf::str()
|
|
{
|
|
freeze(1);
|
|
return base();
|
|
}
|
|
|
|
_IO_ssize_t strstreambuf::pcount () { return _IO_write_ptr - _IO_write_base; }
|
|
|
|
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._allocate_buffer = alloc ? alloc : default_alloc;
|
|
_s._free_buffer = free ? free : default_free;
|
|
if (initial_size > 0)
|
|
{
|
|
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, dir, mode);
|
|
}
|
|
|
|
int strstreambuf::pbackfail(int c)
|
|
{
|
|
return _IO_str_pbackfail (this, c);
|
|
}
|