From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <008601c34591$54e87200$d2944251@insultant.net>
From: "boyd, rounin" <boyd@insultant.net>
To: <9fans@cse.psu.edu>
References: <E19ZwTi-0004u8-0U@anchor-post-39.mail.demon.net> <3F0B273E.30201@proweb.co.uk>
Subject: Re: [9fans] Rstat needs three size fields?
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Date: Tue,  8 Jul 2003 22:41:39 +0200
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> yes, tis true, but only temporarily

tis true it's a god-awful algorithm.

mangle the pointer from char * to void * in this:

typedef long  msg_idx;

typedef struct
{
    msg_idx    v_count;
    msg_idx    v_size;
    msg_idx    v_incr;
    char            **v_list;
}
    vec;


echo vec.c
sed 's/.//' >vec.c <<'//GO.SYSIN DD vec.c'
-/*
- * Dynamic vector of strings.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)vec.c 1.31";
-#endif lint
-
-#include "mace.h"
-
-void
-vec_init(v, n)
-register vec *v;
-register int n;
-{
- v->v_count = 0;
- v->v_size = v->v_incr = n;
- v->v_list = (char **)salloc(n * sizeof(char *));
-}
-
-char *
-vec_str(v, s)
-register vec *v;
-register char *s;
-{
- if (v->v_count == v->v_size)
-  v->v_list = (char **)srealloc((char *)v->v_list, (int)(v->v_size +=
v->v_incr) * sizeof(char *));
-
- v->v_list[v->v_count++] = s;
-
- return s;
-}
-
-char *
-vec_cat(v, s)
-register vec *v;
-register char *s;
-{
- if (v->v_count != 0)
- {
-  register char *p;
-
-  if (v->v_list[v->v_count - 1] != NULLSTR)
-  {
-   p = concat(v->v_list[v->v_count - 1], s);
-
-   (void)free(v->v_list[v->v_count - 1]);
-   (void)free(s);
-  }
-  else
-   p = s;
-
-  return v->v_list[v->v_count - 1] = p;
- }
- else
-  return vec_str(v, s);
-}
-
-void
-vec_free(v)
-register vec *v;
-{
- register int i;
-
- for (i = 0; i < v->v_count; i++)
- {
-  if (v->v_list[i] != NULLSTR)
-   (void)free(v->v_list[i]);
- }
-
- v->v_count = 0;
- v->v_size = 0;
- v->v_incr = 0;
- (void)free((char *)v->v_list);
-}
//GO.SYSIN DD vec.c

i think that demonstrates the concept.