usr/src/lib/libc/port/locale/regerror.c

   1 /*
   2  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Henry Spencer.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "lint.h"
  36 #include "file64.h"
  37 #include <sys/types.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <limits.h>
  41 #include <stdlib.h>
  42 #include <regex.h>
  43
  44 #include "utils.h"
  45 #include "../gen/_libc_gettext.h"
  46
  47 #define RERR(x, msg)    { x, #x, msg }
  48
  49 static struct rerr {
  50         int code;
  51         char *name;
  52         char *explain;
  53 } rerrs[] = {
  54         RERR(REG_NOMATCH,       "regexec() failed to match"),
  55         RERR(REG_BADPAT,        "invalid regular expression"),
  56         RERR(REG_ECOLLATE,      "invalid collating element"),
  57         RERR(REG_ECTYPE,        "invalid character class"),
  58         RERR(REG_EESCAPE,       "trailing backslash (\\)"),
  59         RERR(REG_ESUBREG,       "invalid backreference number"),
  60         RERR(REG_EBRACK,        "brackets ([ ]) not balanced"),
  61         RERR(REG_EPAREN,        "parentheses not balanced"),
  62         RERR(REG_EBRACE,        "braces not balanced"),
  63         RERR(REG_BADBR,         "invalid repetition count(s)"),
  64         RERR(REG_ERANGE,        "invalid character range"),
  65         RERR(REG_ESPACE,        "out of memory"),
  66         RERR(REG_BADRPT,        "repetition-operator operand invalid"),
  67 #ifdef  REG_EMPTY
  68         RERR(REG_EMPTY,         "empty (sub)expression"),
  69 #endif
  70         RERR(REG_EFATAL,        "fatal internal error"),
  71 #ifdef  REG_INVARG
  72         RERR(REG_INVARG,        "invalid argument to regex routine"),
  73 #endif
  74         RERR(REG_ECHAR,         "illegal byte sequence"),
  75         RERR(REG_ENOSYS,        "function not supported"),
  76         RERR(REG_STACK,         "backtrack stack overflow"),
  77         RERR(REG_ENSUB,         "more than 9 \\( \\) pairs"),
  78         RERR(REG_ENEWLINE,      "\n found before end of pattern"),
  79         {0,     "",             "*** unknown regexp error code ***"}
  80 };
  81
  82
  83 /*
  84  * regerror - the interface to error numbers
  85  */
  86 /* ARGSUSED */
  87 size_t
  88 regerror(int errcode, const regex_t *_RESTRICT_KYWD preg,
  89     char *_RESTRICT_KYWD errbuf, size_t errbuf_size)
  90 {
  91         struct rerr *r;
  92         size_t len;
  93         char *s;
  94
  95         for (r = rerrs; r->code != 0; r++)
  96                 if (r->code == errcode)
  97                         break;
  98
  99         s = _libc_gettext(r->explain);
 100
 101         len = strlen(s) + 1;
 102         if (errbuf_size > 0) {
 103                 if (errbuf_size > len)
 104                         (void) strcpy(errbuf, s);
 105                 else {
 106                         (void) strncpy(errbuf, s, errbuf_size-1);
 107                         errbuf[errbuf_size-1] = '\0';
 108                 }
 109         }
 110
 111         return (len);
 112 }