lib/strerror-idna.c

   1 /* strerror-idna.c --- Convert IDNA errors into text.
   2  * Copyright (C) 2004  Simon Josefsson
   3  *
   4  * This file is part of GNU Libidn.
   5  *
   6  * GNU Libidn is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * GNU Libidn is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with GNU Libidn; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #if HAVE_CONFIG_H
  23 # include "config.h"
  24 #endif
  25
  26 #include "idna.h"
  27
  28 #include "gettext.h"
  29 #define _(String) dgettext (PACKAGE, String)
  30
  31 /**
  32  * idna_strerror - return string describing idna error code
  33  * @rc: an #Idna_rc return code.
  34  *
  35  * Convert a return code integer to a text string.  This string can be
  36  * used to output a diagnostic message to the user.
  37  *
  38  * IDNA_SUCCESS: Successful operation.  This value is guaranteed to
  39  *   always be zero, the remaining ones are only guaranteed to hold
  40  *   non-zero values, for logical comparison purposes.
  41  * IDNA_STRINGPREP_ERROR:  Error during string preparation.
  42  * IDNA_PUNYCODE_ERROR: Error during punycode operation.
  43  * IDNA_CONTAINS_NON_LDH: For IDNA_USE_STD3_ASCII_RULES, indicate that
  44  *   the string contains non-LDH ASCII characters.
  45  * IDNA_CONTAINS_MINUS: For IDNA_USE_STD3_ASCII_RULES, indicate that
  46  *   the string contains a leading or trailing hyphen-minus (U+002D).
  47  * IDNA_INVALID_LENGTH: The final output string is not within the
  48  *   (inclusive) range 1 to 63 characters.
  49  * IDNA_NO_ACE_PREFIX: The string does not contain the ACE prefix
  50  *   (for ToUnicode).
  51  * IDNA_ROUNDTRIP_VERIFY_ERROR: The ToASCII operation on output
  52  *   string does not equal the input.
  53  * IDNA_CONTAINS_ACE_PREFIX: The input contains the ACE prefix (for
  54  *   ToASCII).
  55  * IDNA_ICONV_ERROR: Could not convert string in locale encoding.
  56  * IDNA_MALLOC_ERROR: Could not allocate buffer (this is typically a
  57  *   fatal error).
  58  * IDNA_DLOPEN_ERROR: Could not dlopen the libcidn DSO (only used
  59  *   internally in libc).
  60  *
  61  * Return value: Returns a pointer to a statically allocated string
  62  * containing a description of the error with the return code @rc.
  63  **/
  64 const char *
  65 idna_strerror (Idna_rc rc)
  66 {
  67   const char *p;
  68
  69   bindtextdomain (PACKAGE, LOCALEDIR);
  70
  71   switch (rc)
  72     {
  73     case IDNA_SUCCESS:
  74       p = _("Success");
  75       break;
  76
  77     case IDNA_STRINGPREP_ERROR:
  78       p = _("String preparation failed");
  79       break;
  80
  81     case IDNA_PUNYCODE_ERROR:
  82       p = _("Punycode failed");
  83       break;
  84
  85     case IDNA_CONTAINS_NON_LDH:
  86       p = _("Non-digit/letter/hyphen in input");
  87       break;
  88
  89     case IDNA_CONTAINS_MINUS:
  90       p = _("Forbidden leading or trailing minus sign (`-')");
  91       break;
  92
  93     case IDNA_INVALID_LENGTH:
  94       p = _("Output would be too large or too small");
  95       break;
  96
  97     case IDNA_NO_ACE_PREFIX:
  98       p = _("Input does not start with ACE prefix (`xn--')");
  99       break;
 100
 101     case IDNA_ROUNDTRIP_VERIFY_ERROR:
 102       p = _("String not idempotent under ToASCII");
 103       break;
 104
 105     case IDNA_CONTAINS_ACE_PREFIX:
 106       p = _("Input already contain ACE prefix (`xn--')");
 107       break;
 108
 109     case IDNA_ICONV_ERROR:
 110       p = _("System iconv failed");
 111       break;
 112
 113     case IDNA_MALLOC_ERROR:
 114       p = _("Cannot allocate memory");
 115       break;
 116
 117     case IDNA_DLOPEN_ERROR:
 118       p = _("System dlopen failed");
 119       break;
 120
 121     default:
 122       p = _("Unknown error");
 123       break;
 124     }
 125
 126   return p;
 127 }