/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=8 sts=2 sw=2 fenc=utf-8                                :vi│
╚──────────────────────────────────────────────────────────────────────────────╝
│                                                                              │
│  Musl Libc                                                                   │
│  Copyright © 2005-2014 Rich Felker, et al.                                   │
│                                                                              │
│  Permission is hereby granted, free of charge, to any person obtaining       │
│  a copy of this software and associated documentation files (the             │
│  "Software"), to deal in the Software without restriction, including         │
│  without limitation the rights to use, copy, modify, merge, publish,         │
│  distribute, sublicense, and/or sell copies of the Software, and to          │
│  permit persons to whom the Software is furnished to do so, subject to       │
│  the following conditions:                                                   │
│                                                                              │
│  The above copyright notice and this permission notice shall be              │
│  included in all copies or substantial portions of the Software.             │
│                                                                              │
│  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,             │
│  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF          │
│  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.      │
│  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY        │
│  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,        │
│  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE           │
│  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                      │
│                                                                              │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/fmt.h"
#include "third_party/regex/tre.inc"

/* Error message strings for error codes listed in `regex.h'.  This list
   needs to be in sync with the codes listed there, naturally. */

/* Converted to single string by Rich Felker to remove the need for
 * data relocations at runtime, 27 Feb 2006. */

static const char messages[] = {
    "No error\0"
    "No match\0"
    "Invalid regexp\0"
    "Unknown collating element\0"
    "Unknown character class name\0"
    "Trailing backslash\0"
    "Invalid back reference\0"
    "Missing ']'\0"
    "Missing ')'\0"
    "Missing '}'\0"
    "Invalid contents of {}\0"
    "Invalid character range\0"
    "Out of memory\0"
    "Repetition not preceded by valid expression\0"
    "\0Unknown error"};

size_t regerror(int e, const regex_t *restrict preg, char *restrict buf,
                size_t size) {
  const char *s;
  for (s = messages; e && *s; e--, s += strlen(s) + 1)
    ;
  if (!*s) s++;
  return 1 + snprintf(buf, size, "%s", s);
}