mirror of
https://github.com/jart/cosmopolitan.git
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67 lines
2.8 KiB
C
67 lines
2.8 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=2 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/bits/safemacros.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/fmt.h"
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#include "libc/fmt/itoa.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/enum/formatmessageflags.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/str/str.h"
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extern const struct Error {
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int x;
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int s;
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} kErrorNames[];
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static const char *GetErrorName(long x) {
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int i;
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if (x) {
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for (i = 0; kErrorNames[i].x; ++i) {
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if (x == *(const long *)((uintptr_t)kErrorNames + kErrorNames[i].x)) {
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return (const char *)((uintptr_t)kErrorNames + kErrorNames[i].s);
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}
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}
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}
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return "EUNKNOWN";
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}
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/**
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* Converts errno value to string.
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* @return 0 on success, or error code
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*/
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int strerror_r(int err, char *buf, size_t size) {
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char *p;
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const char *s;
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err &= 0xFFFF;
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s = GetErrorName(err);
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p = buf;
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if (strlen(s) + 1 + 5 + 1 + 1 <= size) {
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p = stpcpy(p, s);
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*p++ = '[';
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p += uint64toarray_radix10(err, p);
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*p++ = ']';
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}
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if (p - buf < size) {
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*p++ = '\0';
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}
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return 0;
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}
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