LCOV - code coverage report
Current view: directory - nsprpub/pr/src/misc - prerrortable.c (source / functions) Found Hit Coverage
Test: app.info Lines: 69 10 14.5 %
Date: 2012-06-02 Functions: 6 1 16.7 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is the Netscape Portable Runtime (NSPR).
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * Netscape Communications Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 1998-2000
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *
      23                 :  * Alternatively, the contents of this file may be used under the terms of
      24                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      25                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      26                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      27                 :  * of those above. If you wish to allow use of your version of this file only
      28                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      29                 :  * use your version of this file under the terms of the MPL, indicate your
      30                 :  * decision by deleting the provisions above and replace them with the notice
      31                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      32                 :  * the provisions above, a recipient may use your version of this file under
      33                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      34                 :  *
      35                 :  * ***** END LICENSE BLOCK ***** */
      36                 : 
      37                 : 
      38                 : 
      39                 : 
      40                 : /*
      41                 : 
      42                 : Copyright 1987, 1988 by the Student Information Processing Board
      43                 :         of the Massachusetts Institute of Technology
      44                 : 
      45                 : Permission to use, copy, modify, and distribute this software
      46                 : and its documentation for any purpose and without fee is
      47                 : hereby granted, provided that the above copyright notice
      48                 : appear in all copies and that both that copyright notice and
      49                 : this permission notice appear in supporting documentation,
      50                 : and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
      51                 : used in advertising or publicity pertaining to distribution
      52                 : of the software without specific, written prior permission.
      53                 : M.I.T. and the M.I.T. S.I.P.B. make no representations about
      54                 : the suitability of this software for any purpose.  It is
      55                 : provided "as is" without express or implied warranty.
      56                 : 
      57                 : */
      58                 : 
      59                 : #include <string.h>
      60                 : #ifdef SUNOS4
      61                 : #include "md/sunos4.h"  /* for strerror */
      62                 : #endif
      63                 : #include <assert.h>
      64                 : #include <errno.h>
      65                 : #include "prmem.h"
      66                 : #include "prerror.h"
      67                 : 
      68                 : #define ERRCODE_RANGE   8       /* # of bits to shift table number */
      69                 : #define BITS_PER_CHAR   6       /* # bits to shift per character in name */
      70                 : 
      71                 : #ifdef NEED_SYS_ERRLIST
      72                 : extern char const * const sys_errlist[];
      73                 : extern const int sys_nerr;
      74                 : #endif
      75                 : 
      76                 : /* List of error tables */
      77                 : struct PRErrorTableList {
      78                 :     struct PRErrorTableList *next;
      79                 :     const struct PRErrorTable *table;
      80                 :     struct PRErrorCallbackTablePrivate *table_private;
      81                 : };
      82                 : static struct PRErrorTableList * Table_List = (struct PRErrorTableList *) NULL;
      83                 : 
      84                 : /* Supported languages */
      85                 : static const char * default_languages[] = { "i-default", "en", 0 };
      86                 : static const char * const * callback_languages = default_languages;
      87                 : 
      88                 : /* Callback info */
      89                 : static struct PRErrorCallbackPrivate *callback_private = 0;
      90                 : static PRErrorCallbackLookupFn *callback_lookup = 0;
      91                 : static PRErrorCallbackNewTableFn *callback_newtable = 0;
      92                 : 
      93                 : 
      94                 : static const char char_set[] =
      95                 :         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
      96                 : 
      97                 : static const char *
      98               0 : error_table_name (PRErrorCode num)
      99                 : {
     100                 :     static char buf[6]; /* only used if internal code problems exist */
     101                 : 
     102                 :     long ch;
     103                 :     int i;
     104                 :     char *p;
     105                 : 
     106                 :     /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */
     107               0 :     p = buf;
     108               0 :     num >>= ERRCODE_RANGE;
     109                 :     /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */
     110               0 :     num &= 077777777;
     111                 :     /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */
     112               0 :     for (i = 4; i >= 0; i--) {
     113               0 :         ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1);
     114               0 :         if (ch != 0)
     115               0 :             *p++ = char_set[ch-1];
     116                 :     }
     117               0 :     *p = '\0';
     118               0 :     return(buf);
     119                 : }
     120                 : 
     121                 : PR_IMPLEMENT(const char *)
     122               0 : PR_ErrorToString(PRErrorCode code, PRLanguageCode language)
     123                 : {
     124                 :     /* static buffer only used if code is using inconsistent error message
     125                 :      * numbers, so just ignore the possible thread contention
     126                 :      */
     127                 :     static char buffer[25];
     128                 : 
     129                 :     const char *msg;
     130                 :     int offset;
     131                 :     PRErrorCode table_num;
     132                 :     struct PRErrorTableList *et;
     133               0 :     int started = 0;
     134                 :     char *cp;
     135                 : 
     136               0 :     for (et = Table_List; et; et = et->next) {
     137               0 :         if (et->table->base <= code &&
     138               0 :             et->table->base + et->table->n_msgs > code) {
     139                 :             /* This is the right table */
     140               0 :             if (callback_lookup) {
     141               0 :                 msg = callback_lookup(code, language, et->table,
     142                 :                     callback_private, et->table_private);
     143               0 :                 if (msg) return msg;
     144                 :             }
     145                 :     
     146               0 :             return(et->table->msgs[code - et->table->base].en_text);
     147                 :         }
     148                 :     }
     149                 : 
     150               0 :     if (code >= 0 && code < 256) {
     151               0 :         return strerror(code);
     152                 :     }
     153                 : 
     154               0 :     offset = (int) (code & ((1<<ERRCODE_RANGE)-1));
     155               0 :     table_num = code - offset;
     156               0 :     strcpy (buffer, "Unknown code ");
     157               0 :     if (table_num) {
     158               0 :         strcat(buffer, error_table_name (table_num));
     159               0 :         strcat(buffer, " ");
     160                 :     }
     161               0 :     for (cp = buffer; *cp; cp++)
     162                 :         ;
     163               0 :     if (offset >= 100) {
     164               0 :         *cp++ = (char)('0' + offset / 100);
     165               0 :         offset %= 100;
     166               0 :         started++;
     167                 :     }
     168               0 :     if (started || offset >= 10) {
     169               0 :         *cp++ = (char)('0' + offset / 10);
     170               0 :         offset %= 10;
     171                 :     }
     172               0 :     *cp++ = (char)('0' + offset);
     173               0 :     *cp = '\0';
     174               0 :     return(buffer);
     175                 : }
     176                 : 
     177                 : PR_IMPLEMENT(const char *)
     178               0 : PR_ErrorToName(PRErrorCode code)
     179                 : {
     180                 :     struct PRErrorTableList *et;
     181                 : 
     182               0 :     for (et = Table_List; et; et = et->next) {
     183               0 :         if (et->table->base <= code &&
     184               0 :             et->table->base + et->table->n_msgs > code) {
     185                 :             /* This is the right table */
     186               0 :             return(et->table->msgs[code - et->table->base].name);
     187                 :         }
     188                 :     }
     189                 : 
     190               0 :     return 0;
     191                 : }
     192                 : 
     193                 : PR_IMPLEMENT(const char * const *)
     194               0 : PR_ErrorLanguages(void)
     195                 : {
     196               0 :     return callback_languages;
     197                 : }
     198                 : 
     199                 : PR_IMPLEMENT(PRErrorCode)
     200           20830 : PR_ErrorInstallTable(const struct PRErrorTable *table)
     201                 : {
     202                 :     struct PRErrorTableList * new_et;
     203                 : 
     204           20830 :     new_et = (struct PRErrorTableList *)
     205           20830 :                                         PR_Malloc(sizeof(struct PRErrorTableList));
     206           20830 :     if (!new_et)
     207               0 :         return errno;   /* oops */
     208           20830 :     new_et->table = table;
     209           20830 :     if (callback_newtable) {
     210               0 :         new_et->table_private = callback_newtable(table, callback_private);
     211                 :     } else {
     212           20830 :         new_et->table_private = 0;
     213                 :     }
     214           20830 :     new_et->next = Table_List;
     215           20830 :     Table_List = new_et;
     216           20830 :     return 0;
     217                 : }
     218                 : 
     219                 : PR_IMPLEMENT(void)
     220               0 : PR_ErrorInstallCallback(const char * const * languages,
     221                 :                        PRErrorCallbackLookupFn *lookup, 
     222                 :                        PRErrorCallbackNewTableFn *newtable,
     223                 :                        struct PRErrorCallbackPrivate *cb_private)
     224                 : {
     225                 :     struct PRErrorTableList *et;
     226                 : 
     227               0 :     assert(strcmp(languages[0], "i-default") == 0);
     228               0 :     assert(strcmp(languages[1], "en") == 0);
     229                 :     
     230               0 :     callback_languages = languages;
     231               0 :     callback_lookup = lookup;
     232               0 :     callback_newtable = newtable;
     233               0 :     callback_private = cb_private;
     234                 : 
     235               0 :     if (callback_newtable) {
     236               0 :         for (et = Table_List; et; et = et->next) {
     237               0 :             et->table_private = callback_newtable(et->table, callback_private);
     238                 :         }
     239                 :     }
     240               0 : }

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