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https://github.com/jart/cosmopolitan.git
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8bdaddd81d
The stdio reader thread now appears to be working recursively along cosmopolitan subprocesses. For example, it's now possible to launch vim.com from the unbourne.com bestline repl, thanks to hacks plus a bug fix to select() timeouts.
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 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/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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