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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
76 lines
3 KiB
C
76 lines
3 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 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/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/fmt/magnumstrs.internal.h"
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#include "libc/nt/runtime.h"
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#include "libc/str/str.h"
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/**
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* Converts errno value to string.
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*
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* @param err is error number or zero if unknown
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* @return 0 on success, or errno on error
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* @raise ERANGE if insufficient buffer was available, in which case a
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* nul-terminated string is still copied to `buf`
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*/
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errno_t strerror_r(int err, char *buf, size_t size) {
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int c;
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char tmp[32];
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char *p = buf;
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char *pe = p + size;
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// copy unix error information
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const char *msg;
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if (!err) {
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msg = "No error information";
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} else if (!(msg = _strerdoc(err))) {
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FormatInt32(stpcpy(tmp, "Error "), err);
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msg = tmp;
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}
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while ((c = *msg++) && p + 1 < pe) {
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*p++ = c;
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}
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// copy windows error information
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if (IsWindows()) {
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uint32_t winerr;
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if ((winerr = GetLastError()) != err && winerr) {
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stpcpy(FormatUint32(stpcpy(tmp, " (win32 error "), winerr), ")");
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msg = tmp;
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while ((c = *msg++) && p + 1 < pe) {
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*p++ = c;
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}
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}
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}
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// force nul terminator
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if (p < pe) {
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*p++ = 0;
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}
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// return result code
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if (p < pe) {
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return 0;
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} else {
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return ERANGE;
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}
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}
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