mirror of
https://github.com/jart/cosmopolitan.git
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8bfd56b59e
Now that these functions are behind _COSMO_SOURCE there's no reason for having the ugly underscore anymore. To use these functions, you need to pass -mcosmo to cosmocc.
63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/bsr.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/sock/select.h"
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#include "libc/sock/select.internal.h"
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#define N 100
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#define append(...) o += ksnprintf(buf + o, N - o, __VA_ARGS__)
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const char *(DescribeFdSet)(char buf[N], ssize_t rc, int nfds, fd_set *fds) {
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int o = 0;
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if (!fds) return "NULL";
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if ((!IsAsan() && kisdangerous(fds)) ||
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(IsAsan() && !__asan_is_valid(fds, sizeof(*fds) * nfds))) {
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ksnprintf(buf, N, "%p", fds);
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return buf;
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}
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append("{");
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bool gotsome = false;
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for (int fd = 0; fd < nfds; fd += 64) {
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uint64_t w = fds->fds_bits[fd >> 6];
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while (w) {
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unsigned m = bsr(w);
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w &= ~((uint64_t)1 << m);
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if (fd + m < nfds) {
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if (!gotsome) {
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gotsome = true;
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} else {
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append(", ");
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}
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append("%d", fd + m);
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}
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}
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}
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append("}");
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return buf;
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}
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