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/* Copyright (C) 1995-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "libioP.h"
#include "strfile.h"
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
struct _IO_FILE_wmemstream
{
_IO_strfile _sf;
wchar_t **bufloc;
size_t *sizeloc;
};
static int _IO_wmem_sync (FILE* fp) __THROW;
static void _IO_wmem_finish (FILE* fp, int) __THROW;
static const struct _IO_jump_t _IO_wmem_jumps libio_vtable =
{
JUMP_INIT_DUMMY,
JUMP_INIT (finish, _IO_wmem_finish),
JUMP_INIT (overflow, (_IO_overflow_t) _IO_wstr_overflow),
JUMP_INIT (underflow, (_IO_underflow_t) _IO_wstr_underflow),
JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail),
JUMP_INIT (xsputn, _IO_wdefault_xsputn),
JUMP_INIT (xsgetn, _IO_wdefault_xsgetn),
JUMP_INIT (seekoff, _IO_wstr_seekoff),
JUMP_INIT (seekpos, _IO_default_seekpos),
JUMP_INIT (setbuf, _IO_default_setbuf),
JUMP_INIT (sync, _IO_wmem_sync),
JUMP_INIT (doallocate, _IO_wdefault_doallocate),
JUMP_INIT (read, _IO_default_read),
JUMP_INIT (write, _IO_default_write),
JUMP_INIT (seek, _IO_default_seek),
JUMP_INIT (close, _IO_default_close),
JUMP_INIT (stat, _IO_default_stat),
JUMP_INIT (showmanyc, _IO_default_showmanyc),
JUMP_INIT (imbue, _IO_default_imbue)
};
/* Open a stream that writes into a malloc'd buffer that is expanded as
necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
and the number of characters written on fflush or fclose. */
FILE *
open_wmemstream (wchar_t **bufloc, size_t *sizeloc)
{
struct locked_FILE
{
struct _IO_FILE_wmemstream fp;
#ifdef _IO_MTSAFE_IO
_IO_lock_t lock;
#endif
struct _IO_wide_data wd;
} *new_f;
wchar_t *buf;
new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
if (new_f == NULL)
return NULL;
#ifdef _IO_MTSAFE_IO
new_f->fp._sf._sbf._f._lock = &new_f->lock;
#endif
buf = calloc (1, BUFSIZ);
if (buf == NULL)
{
free (new_f);
return NULL;
}
_IO_no_init (&new_f->fp._sf._sbf._f, 0, 0, &new_f->wd, &_IO_wmem_jumps);
_IO_fwide (&new_f->fp._sf._sbf._f, 1);
_IO_wstr_init_static (&new_f->fp._sf._sbf._f, buf,
BUFSIZ / sizeof (wchar_t), buf);
new_f->fp._sf._sbf._f._flags2 &= ~_IO_FLAGS2_USER_WBUF;
new_f->fp._sf._s._allocate_buffer_unused = (_IO_alloc_type) malloc;
new_f->fp._sf._s._free_buffer_unused = (_IO_free_type) free;
new_f->fp.bufloc = bufloc;
new_f->fp.sizeloc = sizeloc;
/* Disable single thread optimization. BZ 21735. */
new_f->fp._sf._sbf._f._flags2 |= _IO_FLAGS2_NEED_LOCK;
return (FILE *) &new_f->fp._sf._sbf;
}
static int
_IO_wmem_sync (FILE *fp)
{
struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp;
if (fp->_wide_data->_IO_write_ptr == fp->_wide_data->_IO_write_end)
{
_IO_wstr_overflow (fp, '\0');
--fp->_wide_data->_IO_write_ptr;
}
*mp->bufloc = fp->_wide_data->_IO_write_base;
*mp->sizeloc = (fp->_wide_data->_IO_write_ptr
- fp->_wide_data->_IO_write_base);
return 0;
}
static void
_IO_wmem_finish (FILE *fp, int dummy)
{
struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp;
*mp->bufloc = (wchar_t *) realloc (fp->_wide_data->_IO_write_base,
(fp->_wide_data->_IO_write_ptr
- fp->_wide_data->_IO_write_base + 1)
* sizeof (wchar_t));
if (*mp->bufloc != NULL)
{
size_t len = (fp->_wide_data->_IO_write_ptr
- fp->_wide_data->_IO_write_base);
(*mp->bufloc)[len] = '\0';
*mp->sizeloc = len;
fp->_wide_data->_IO_buf_base = NULL;
}
_IO_wstr_finish (fp, 0);
}
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