diff options
Diffstat (limited to 'libc/stdio/funopen.c')
-rw-r--r-- | libc/stdio/funopen.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libc/stdio/funopen.c b/libc/stdio/funopen.c new file mode 100644 index 0000000..b85ee96 --- /dev/null +++ b/libc/stdio/funopen.c @@ -0,0 +1,68 @@ +/* $OpenBSD: funopen.c,v 1.8 2005/08/08 08:05:36 espie Exp $ */ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * 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 University 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 REGENTS 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 REGENTS 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. + */ + +#include <stdio.h> +#include <errno.h> +#include "local.h" + +FILE * +funopen(const void *cookie, int (*readfn)(void *, char *, int), + int (*writefn)(void *, const char *, int), + fpos_t (*seekfn)(void *, fpos_t, int), int (*closefn)(void *)) +{ + FILE *fp; + int flags; + + if (readfn == NULL) { + if (writefn == NULL) { /* illegal */ + errno = EINVAL; + return (NULL); + } else + flags = __SWR; /* write only */ + } else { + if (writefn == NULL) + flags = __SRD; /* read only */ + else + flags = __SRW; /* read-write */ + } + if ((fp = __sfp()) == NULL) + return (NULL); + fp->_flags = flags; + fp->_file = -1; + fp->_cookie = (void *)cookie; /* SAFE: cookie not modified */ + fp->_read = readfn; + fp->_write = writefn; + fp->_seek = seekfn; + fp->_close = closefn; + return (fp); +} |