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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2024 Keith Packard
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define _DEFAULT_SOURCE
#include <stdlib.h>
#include <stdio-bufio.h>
FILE *
funopen(const void *cookie, ssize_t (*readfn)(void *cookie, void *buf, size_t n),
ssize_t (*writefn)(void *cookie, const void *buf, size_t n),
__off_t (*seekfn)(void *cookie, __off_t off, int whence), int (*closefn)(void *cookie))
{
struct __file_bufio *bf;
char *buf;
int open_flags = 0;
if (readfn)
open_flags |= __SRD;
if (writefn)
open_flags |= __SWR;
/* Allocate file structure and necessary buffers */
bf = calloc(1, sizeof(struct __file_bufio) + BUFSIZ);
if (bf == NULL)
return NULL;
buf = (char *)(bf + 1);
*bf = (struct __file_bufio)FDEV_SETUP_BUFIO_PTR(cookie, buf, BUFSIZ, readfn, writefn, seekfn,
closefn, open_flags, __BFALL);
return (FILE *)bf;
}