45 lines
2.4 KiB
C
45 lines
2.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/stdio/stdio.h"
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#include "libc/calls/calls.h"
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#include "libc/sysv/consts/o.h"
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/**
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* Turns stdio flags description string into bitmask.
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*/
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int fopenflags(const char *mode) {
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unsigned flags = 0;
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do {
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if (*mode == 'r') {
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flags |= O_RDONLY;
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} else if (*mode == 'w') {
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flags |= O_WRONLY | O_CREAT | O_TRUNC;
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} else if (*mode == 'a') {
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flags |= O_WRONLY | O_CREAT | O_APPEND;
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} else if (*mode == '+') {
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flags |= O_RDWR;
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} else if (*mode == 'x') {
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flags |= O_EXCL;
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} else if (*mode == 'e') {
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flags |= O_CLOEXEC;
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}
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} while (*mode++);
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return flags;
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}
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