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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/' ```
65 lines
3.1 KiB
C
65 lines
3.1 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/intrin/safemacros.internal.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "third_party/regex/regex.h"
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/* Error message strings for error codes listed in `regex.h'. This list
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needs to be in sync with the codes listed there, naturally. */
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static const char kRegexErrors[] =
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"No error\0"
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"No match\0"
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"Invalid regexp\0"
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"Unknown collating element\0"
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"Unknown character class name\0"
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"Trailing backslash\0"
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"Invalid back reference\0"
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"Missing ']'\0"
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"Missing ')'\0"
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"Missing '}'\0"
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"Invalid contents of {}\0"
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"Invalid character range\0"
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"Out of memory\0"
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"Repetition not preceded by valid expression\0";
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static const char *IndexDoubleNulString(const char *s, unsigned i) {
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size_t n;
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while (i--) {
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if ((n = strlen(s))) {
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s += n + 1;
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} else {
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return NULL;
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}
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}
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return s;
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}
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/**
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* Converts regular expression error code to string.
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*
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* @param e is error code
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* @return number of bytes needed to hold entire string
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*/
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size_t regerror(int e, const regex_t *preg, char *buf, size_t size) {
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return 1 + (snprintf)(buf, size, "%s",
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firstnonnull(IndexDoubleNulString(kRegexErrors, e),
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"Unknown error"));
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}
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