diff options
Diffstat (limited to 'stdio/freadable.c')
| -rw-r--r-- | stdio/freadable.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/stdio/freadable.c b/stdio/freadable.c new file mode 100644 index 0000000..23281cb --- /dev/null +++ b/stdio/freadable.c @@ -0,0 +1,28 @@ +/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ +│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ +╞══════════════════════════════════════════════════════════════════════════════╡ +│ Copyright 2021 Justine Alexandra Roberts Tunney │ +│ │ +│ Permission to use, copy, modify, and/or distribute this software for │ +│ any purpose with or without fee is hereby granted, provided that the │ +│ above copyright notice and this permission notice appear in all copies. │ +│ │ +│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │ +│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │ +│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │ +│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │ +│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │ +│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │ +│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ +│ PERFORMANCE OF THIS SOFTWARE. │ +╚─────────────────────────────────────────────────────────────────────────────*/ +#include "libc/stdio/stdio_ext.h" +#include "libc/sysv/consts/o.h" + +/** + * Returns nonzero if stream allows reading. + */ +int __freadable(FILE *f) { + return (f->iomode & O_ACCMODE) == O_RDONLY || + (f->iomode & O_ACCMODE) == O_RDWR; +} |