134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
/* This is part of libio/iostream, providing -*- C++ -*- input/output.
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Copyright (C) 1993 Free Software Foundation
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This file is part of the GNU IO Library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does not cause
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the resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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/* Written by Per Bothner (bothner@cygnus.com). */
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "iostreamP.h"
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#include "strstream.h"
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#include <string.h>
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static void* default_alloc(_IO_size_t size)
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{
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return (void*)new char[size];
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}
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static void default_free(void* ptr)
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{
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delete [] (char*)ptr;
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}
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/* Set to use the _IO_str_jump jumptable, for efficiency */
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#define SET_STR_JUMPS(STRBUF) \
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(STRBUF)->_jumps = &_IO_str_jumps,\
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(STRBUF)->_vtable() = builtinbuf_vtable;
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istrstream::istrstream(const char *cp, int n)
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{
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init(new strstreambuf(cp, n));
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SET_STR_JUMPS(_strbuf);
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}
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ostrstream::ostrstream()
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{
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init(new strstreambuf());
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SET_STR_JUMPS(_strbuf);
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}
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strstreambase::strstreambase(char *cp, int n, int mode)
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{
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char *pstart;
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if (mode == ios::app || mode == ios::ate)
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pstart = cp + strlen(cp);
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else
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pstart = cp;
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init(new strstreambuf(cp, n, pstart));
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SET_STR_JUMPS(_strbuf);
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}
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char *strstreambuf::str()
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{
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freeze(1);
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return base();
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}
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_IO_ssize_t strstreambuf::pcount () { return _IO_write_ptr - _IO_write_base; }
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int strstreambuf::overflow(int c /* = EOF */)
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{
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return _IO_str_overflow (this, c);
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}
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int strstreambuf::underflow()
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{
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return _IO_str_underflow(this);
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}
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void strstreambuf::init_dynamic(_IO_alloc_type alloc, _IO_free_type free,
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int initial_size)
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{
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_s._len = 0;
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if (initial_size < 16)
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initial_size = 16;
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_s._allocate_buffer = alloc ? alloc : default_alloc;
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_s._free_buffer = free ? free : default_free;
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char * buf = (char*)(*_s._allocate_buffer)(initial_size);
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setb(buf, buf + initial_size, 1);
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setp(buf, buf + initial_size);
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setg(buf, buf, buf);
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}
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void strstreambuf::init_static(char *ptr, int size, char *pstart)
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{
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_IO_str_init_static (this, ptr, size, pstart);
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}
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void strstreambuf::init_readonly (const char *ptr, int size)
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{
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_IO_str_init_readonly (this, ptr, size);
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}
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strstreambuf::~strstreambuf()
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{
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if (_IO_buf_base && !(_flags & _IO_USER_BUF))
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(_s._free_buffer)(_IO_buf_base);
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_IO_buf_base = NULL;
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}
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streampos strstreambuf::seekoff(streamoff off, _seek_dir dir,
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int mode /*=ios::in|ios::out*/)
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{
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return _IO_str_seekoff (this, off, convert_to_seekflags(dir, mode));
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}
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int strstreambuf::pbackfail(int c)
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{
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return _IO_str_pbackfail (this, c);
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}
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