lib/et/com_right.c

   1 /*
   2  * com_right.c -- provide Heimdall / Kerberos4kth com_err interfaces
   3  *      for backwards compatibility
   4  *
   5  * Copyright (c) 2003 by Theodore Ts'o
   6  *
   7  * Taken from lib/com_err/error.c from Kerberos4kth distribution.
   8  *
   9  * Copyright (c) 1997, 1998, 2001 Kungliga Tekniska Högskolan
  10  * (Royal Institute of Technology, Stockholm, Sweden).
  11  * All rights reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  *
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  *
  24  * 3. Neither the name of the Institute nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #include "config.h"
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include "com_err.h"
  46 #include "error_table.h"
  47
  48 const char *
  49 com_right(struct et_list *list, long code)
  50 {
  51     struct et_list *p;
  52     for (p = list; p; p = p->next) {
  53         if (code >= p->table->base && code < p->table->base + p->table->n_msgs)
  54             return p->table->msgs[code - p->table->base];
  55     }
  56     return NULL;
  57 }
  58
  59 const char *
  60 com_right_r(struct et_list *list, long code, char *str, size_t len)
  61 {
  62     struct et_list *p;
  63     for (p = list; p; p = p->next) {
  64         if ((code >= p->table->base) &&
  65             (code < p->table->base + p->table->n_msgs)) {
  66             strncpy(str, p->table->msgs[code - p->table->base], len);
  67             str[len-1] = '\0';
  68             return str;
  69         }
  70     }
  71     return NULL;
  72 }
  73
  74 struct foobar {
  75     struct et_list etl;
  76     struct error_table tab;
  77 };
  78
  79 /*
  80  * We provide this routine for compatibility with Heimdall generated
  81  * foo_err.c files, but we don't use this ourselves for foo_err.c
  82  * files generated by our compile_et.  This is so our foo_err.c
  83  * files can be used with older com_err libraries without running
  84  * afoul of dependencies.
  85  */
  86 void
  87 initialize_error_table_r(struct et_list **list,
  88                          const char **messages,
  89                          int num_errors,
  90                          long base)
  91 {
  92     struct et_list *et, **end;
  93     struct error_table *tab;
  94     struct foobar *f;
  95
  96     for (end = list, et = *list; et; end = &et->next, et = et->next)
  97         if (et->table->msgs == messages)
  98             return;
  99     f = malloc(sizeof(*f));
 100     if (f == NULL)
 101         return;
 102     et = &f->etl;
 103     et->table = tab = &f->tab;
 104     tab->msgs = messages;
 105     tab->n_msgs = num_errors;
 106     tab->base = base;
 107     et->next = NULL;
 108     *end = et;
 109 }
 110
 111
 112 void
 113 free_error_table(struct et_list *et)
 114 {
 115     while(et){
 116         struct et_list *p = et;
 117         et = et->next;
 118         free(p);
 119     }
 120 }