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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2017-2025 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <mailutils/types.h>
#include <mailutils/assoc.h>
#include <mailutils/locus.h>
#include <mailutils/error.h>
#include <mailutils/errno.h>
#include <mailutils/diag.h>
#include <mailutils/list.h>
#include <mailutils/io.h>
#include <mailutils/stream.h>
#include <mailutils/iterator.h>
#include <mailutils/util.h>
struct mu_ident_ref
{
size_t count;
};
static mu_assoc_t nametab;
static void
nametab_dealloc (void *ptr)
{
mu_assoc_destroy (&nametab);
}
int
mu_ident_ref (char const *name, char const **refname)
{
int rc;
struct mu_ident_ref *ref, **refptr;
if (!refname)
return MU_ERR_OUT_PTR_NULL;
if (!name)
{
*refname = NULL;
return 0;
}
if (!nametab)
{
rc = mu_assoc_create (&nametab, 0);
if (rc)
{
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_create", NULL, rc);
return rc;
}
mu_assoc_set_destroy_item (nametab, mu_list_free_item);
mu_onexit (nametab_dealloc, NULL);
}
rc = mu_assoc_install_ref2 (nametab, name, &refptr, refname);
switch (rc)
{
case 0:
ref = malloc (sizeof *ref);
if (!ref)
{
rc = errno;
mu_assoc_remove (nametab, name);
return rc;
}
*refptr = ref;
ref->count = 0;
break;
case MU_ERR_EXISTS:
ref = *refptr;
break;
default:
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_install_ref2", name, rc);
return rc;
}
ref->count++;
return 0;
}
int
mu_ident_deref (char const *name)
{
struct mu_ident_ref *ref;
int rc;
if (!name || !nametab)
return 0;
rc = mu_assoc_lookup (nametab, name, &ref);
switch (rc)
{
case 0:
if (--ref->count == 0)
mu_assoc_remove (nametab, name);
break;
case MU_ERR_NOENT:
break;
default:
mu_diag_funcall (MU_DIAG_ERROR, "mu_assoc_lookup", name, rc);
return rc;
}
return 0;
}
void
mu_ident_stat (mu_stream_t str)
{
size_t count, i;
mu_iterator_t itr;
mu_stream_printf (str, "BEGIN IDENT STAT\n");
mu_assoc_count (nametab, &count);
mu_stream_printf (str, "N=%zu\n", count);
if (count > 0)
{
int rc = mu_assoc_get_iterator (nametab, &itr);
if (rc)
mu_stream_printf (str, "mu_assoc_get_iterator: %s\n",
mu_strerror (rc));
else
{
i = 0;
for (mu_iterator_first (itr); !mu_iterator_is_done (itr);
mu_iterator_next (itr), i++)
{
const char *key;
struct mu_ident_ref *ref;
mu_iterator_current_kv (itr,
(const void **)&key, (void **)&ref);
mu_stream_printf (str, "%04zu: %s: %zu\n", i, key, ref->count);
}
}
mu_iterator_destroy (&itr);
}
mu_stream_printf (str, "END IDENT STAT\n");
}
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