148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/* Copyright (C) 1995-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include "libioP.h"
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#include "strfile.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <wchar.h>
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struct _IO_FILE_wmemstream
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{
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_IO_strfile _sf;
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wchar_t **bufloc;
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size_t *sizeloc;
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};
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static int _IO_wmem_sync (FILE* fp) __THROW;
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static void _IO_wmem_finish (FILE* fp, int) __THROW;
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static const struct _IO_jump_t _IO_wmem_jumps libio_vtable =
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{
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JUMP_INIT_DUMMY,
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JUMP_INIT (finish, _IO_wmem_finish),
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JUMP_INIT (overflow, (_IO_overflow_t) _IO_wstr_overflow),
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JUMP_INIT (underflow, (_IO_underflow_t) _IO_wstr_underflow),
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JUMP_INIT (uflow, (_IO_underflow_t) _IO_wdefault_uflow),
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JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail),
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JUMP_INIT (xsputn, _IO_wdefault_xsputn),
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JUMP_INIT (xsgetn, _IO_wdefault_xsgetn),
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JUMP_INIT (seekoff, _IO_wstr_seekoff),
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JUMP_INIT (seekpos, _IO_default_seekpos),
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JUMP_INIT (setbuf, _IO_default_setbuf),
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JUMP_INIT (sync, _IO_wmem_sync),
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JUMP_INIT (doallocate, _IO_wdefault_doallocate),
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JUMP_INIT (read, _IO_default_read),
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JUMP_INIT (write, _IO_default_write),
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JUMP_INIT (seek, _IO_default_seek),
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JUMP_INIT (close, _IO_default_close),
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JUMP_INIT (stat, _IO_default_stat),
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JUMP_INIT (showmanyc, _IO_default_showmanyc),
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JUMP_INIT (imbue, _IO_default_imbue)
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};
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/* Open a stream that writes into a malloc'd buffer that is expanded as
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necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
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and the number of characters written on fflush or fclose. */
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FILE *
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open_wmemstream (wchar_t **bufloc, size_t *sizeloc)
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{
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struct locked_FILE
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{
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struct _IO_FILE_wmemstream fp;
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#ifdef _IO_MTSAFE_IO
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_IO_lock_t lock;
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#endif
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struct _IO_wide_data wd;
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} *new_f;
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wchar_t *buf;
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new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
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if (new_f == NULL)
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return NULL;
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#ifdef _IO_MTSAFE_IO
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new_f->fp._sf._sbf._f._lock = &new_f->lock;
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#endif
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buf = calloc (1, BUFSIZ);
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if (buf == NULL)
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{
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free (new_f);
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return NULL;
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}
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_IO_no_init (&new_f->fp._sf._sbf._f, 0, 0, &new_f->wd, &_IO_wmem_jumps);
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_IO_fwide (&new_f->fp._sf._sbf._f, 1);
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_IO_wstr_init_static (&new_f->fp._sf._sbf._f, buf,
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BUFSIZ / sizeof (wchar_t), buf);
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new_f->fp._sf._sbf._f._flags2 &= ~_IO_FLAGS2_USER_WBUF;
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new_f->fp._sf._s._allocate_buffer_unused = (_IO_alloc_type) malloc;
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new_f->fp._sf._s._free_buffer_unused = (_IO_free_type) free;
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new_f->fp.bufloc = bufloc;
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new_f->fp.sizeloc = sizeloc;
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/* Disable single thread optimization. BZ 21735. */
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new_f->fp._sf._sbf._f._flags2 |= _IO_FLAGS2_NEED_LOCK;
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return (FILE *) &new_f->fp._sf._sbf;
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}
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static int
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_IO_wmem_sync (FILE *fp)
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{
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struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp;
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if (fp->_wide_data->_IO_write_ptr == fp->_wide_data->_IO_write_end)
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{
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_IO_wstr_overflow (fp, '\0');
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--fp->_wide_data->_IO_write_ptr;
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}
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*mp->bufloc = fp->_wide_data->_IO_write_base;
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*mp->sizeloc = (fp->_wide_data->_IO_write_ptr
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- fp->_wide_data->_IO_write_base);
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return 0;
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}
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static void
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_IO_wmem_finish (FILE *fp, int dummy)
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{
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struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp;
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*mp->bufloc = (wchar_t *) realloc (fp->_wide_data->_IO_write_base,
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(fp->_wide_data->_IO_write_ptr
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- fp->_wide_data->_IO_write_base + 1)
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* sizeof (wchar_t));
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if (*mp->bufloc != NULL)
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{
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size_t len = (fp->_wide_data->_IO_write_ptr
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- fp->_wide_data->_IO_write_base);
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(*mp->bufloc)[len] = '\0';
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*mp->sizeloc = len;
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fp->_wide_data->_IO_buf_base = NULL;
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}
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_IO_wstr_finish (fp, 0);
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}
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