diplodocus.org Git - nmh/blob - sbr/context_replace.c

   1
   2 /*
   3  * context_replace.c -- add/replace an entry in the context/profile list
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13
  14
  15 void
  16 context_replace (char *key, char *value)
  17 {
  18     register struct node *np;
  19
  20     /*
  21      * If list is emtpy, allocate head of profile/context list.
  22      */
  23     if (!m_defs) {
  24         if (!(m_defs = (struct node *) malloc (sizeof(*np))))
  25             adios (NULL, "unable to allocate profile storage");
  26
  27         np = m_defs;
  28         np->n_name = getcpy (key);
  29         np->n_field = getcpy (value);
  30         np->n_context = 1;
  31         np->n_next = NULL;
  32         ctxflags |= CTXMOD;
  33         return;
  34     }
  35
  36     /*
  37      * Search list of context/profile entries for
  38      * this key, and replace its value if found.
  39      */
  40     for (np = m_defs;; np = np->n_next) {
  41         if (!strcasecmp (np->n_name, key)) {
  42             if (strcmp (value, np->n_field)) {
  43                 if (!np->n_context)
  44                     admonish (NULL, "bug: context_replace(key=\"%s\",value=\"%s\")", key, value);
  45                 if (np->n_field)
  46                     free (np->n_field);
  47                 np->n_field = getcpy (value);
  48                 ctxflags |= CTXMOD;
  49             }
  50             return;
  51         }
  52         if (!np->n_next)
  53             break;
  54     }
  55
  56     /*
  57      * Else add this new entry at the end
  58      */
  59     np->n_next = (struct node *) malloc (sizeof(*np));
  60     if (!np->n_next)
  61         adios (NULL, "unable to allocate profile storage");
  62
  63     np = np->n_next;
  64     np->n_name = getcpy (key);
  65     np->n_field = getcpy (value);
  66     np->n_context = 1;
  67     np->n_next = NULL;
  68     ctxflags |= CTXMOD;
  69 }