contrib/tre/lib/regerror.c

   1 /*
   2   tre_regerror.c - POSIX tre_regerror() implementation for TRE.
   3
   4   This software is released under a BSD-style license.
   5   See the file LICENSE for details and copyright.
   6
   7 */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <config.h>
  11 #endif /* HAVE_CONFIG_H */
  12
  13 #include <string.h>
  14 #ifdef HAVE_WCHAR_H
  15 #include <wchar.h>
  16 #endif /* HAVE_WCHAR_H */
  17 #ifdef HAVE_WCTYPE_H
  18 #include <wctype.h>
  19 #endif /* HAVE_WCTYPE_H */
  20
  21 #include "tre-internal.h"
  22 #include "tre.h"
  23
  24 #ifdef HAVE_GETTEXT
  25 #include <libintl.h>
  26 #else
  27 #define dgettext(p, s) s
  28 #define gettext(s) s
  29 #endif
  30
  31 #define _(String) dgettext(PACKAGE, String)
  32 #define gettext_noop(String) String
  33
  34 /* Error message strings for error codes listed in `tre.h'.  This list
  35    needs to be in sync with the codes listed there, naturally. */
  36 static const char *tre_error_messages[] =
  37   { gettext_noop("No error"),                            /* REG_OK */
  38     gettext_noop("No match"),                            /* REG_NOMATCH */
  39     gettext_noop("Invalid regexp"),                      /* REG_BADPAT */
  40     gettext_noop("Unknown collating element"),           /* REG_ECOLLATE */
  41     gettext_noop("Unknown character class name"),        /* REG_ECTYPE */
  42     gettext_noop("Trailing backslash"),                  /* REG_EESCAPE */
  43     gettext_noop("Invalid back reference"),              /* REG_ESUBREG */
  44     gettext_noop("Missing ']'"),                         /* REG_EBRACK */
  45     gettext_noop("Missing ')'"),                         /* REG_EPAREN */
  46     gettext_noop("Missing '}'"),                         /* REG_EBRACE */
  47     gettext_noop("Invalid contents of {}"),              /* REG_BADBR */
  48     gettext_noop("Invalid character range"),             /* REG_ERANGE */
  49     gettext_noop("Out of memory"),                       /* REG_ESPACE */
  50     gettext_noop("Invalid use of repetition operators"), /* REG_BADRPT */
  51     gettext_noop("Empty (sub)expression"),               /* REG_EMPTY */
  52     gettext_noop("Invalid argument to regex routine"),   /* REG_INVARG */
  53     gettext_noop("Illegal byte sequence")                /* REG_ILLSEQ */
  54   };
  55
  56 size_t
  57 tre_regerror(int errcode, const regex_t * __restrict preg,
  58     char * __restrict errbuf, size_t errbuf_size)
  59 {
  60   const char *err;
  61   size_t err_len;
  62
  63   /*LINTED*/(void)&preg;
  64   if (errcode >= 0
  65       && errcode < (int)(sizeof(tre_error_messages)
  66                          / sizeof(*tre_error_messages)))
  67     err = gettext(tre_error_messages[errcode]);
  68   else
  69     err = gettext("Unknown error");
  70
  71   err_len = strlen(err) + 1;
  72   if (errbuf_size > 0 && errbuf != NULL)
  73     {
  74       if (err_len > errbuf_size)
  75         {
  76           strncpy(errbuf, err, errbuf_size - 1);
  77           errbuf[errbuf_size - 1] = '\0';
  78         }
  79       else
  80         {
  81           strcpy(errbuf, err);
  82         }
  83     }
  84   return err_len;
  85 }
  86
  87 /* EOF */