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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2025 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 <config.h>
#include <stdlib.h>
#include <mailutils/sys/mailcap.h>
#include <mailutils/wordsplit.h>
#include <mailutils/locus.h>
#include <mailutils/nls.h>
#include <mailutils/filter.h>
#include <mailutils/list.h>
#include <mailutils/stream.h>
#include <mailutils/opool.h>
#include <mailutils/cctype.h>
static int
create_entry (mu_mailcap_t mp, char *input, mu_mailcap_entry_t *pent)
{
mu_mailcap_entry_t ent;
struct mu_wordsplit ws;
int rc;
size_t i;
ws.ws_delim = ";";
ws.ws_escape[0] = ";\\";
ws.ws_escape[1] = "";
if (mu_wordsplit (input, &ws,
MU_WRDSF_DELIM
| MU_WRDSF_NOCMD
| MU_WRDSF_NOVAR
| MU_WRDSF_WS
| MU_WRDSF_ESCAPE))
{
if (mp->error.error)
mp->error.error (mp->error.data, &mp->locus,
mu_wordsplit_strerror (&ws));
return MU_ERR_FAILURE;
}
if (ws.ws_wordc < 2)
{
if (mp->error.error)
mp->error.error (mp->error.data, &mp->locus, _("not enough fields"));
mu_wordsplit_free (&ws);
return MU_ERR_PARSE;
}
rc = mu_mailcap_entry_create (&ent, ws.ws_wordv[0], ws.ws_wordv[1]);
if (rc == 0)
{
for (i = 2; i < ws.ws_wordc; i++)
{
char *p = strchr (ws.ws_wordv[i], '=');
if (p)
{
*p++ = 0;
rc = mu_mailcap_entry_set_string (ent, ws.ws_wordv[i], p);
}
else
rc = mu_mailcap_entry_set_bool (ent, ws.ws_wordv[i]);
if (rc)
break;
}
}
mu_wordsplit_free (&ws);
if (rc == 0)
{
if (mp->flags & MU_MAILCAP_FLAG_LOCUS)
{
ent->lrp = calloc (1, sizeof ent->lrp[0]);
if (ent->lrp)
{
mu_locus_range_init (ent->lrp);
rc = mu_locus_range_copy (ent->lrp, &mp->locus);
}
else
rc = errno;
}
}
if (rc)
{
if (mp->error.error)
mp->error.error (mp->error.data, &mp->locus, mu_strerror (rc));
mu_mailcap_entry_destroy (&ent);
}
else
*pent = ent;
return rc;
}
int
mu_mailcap_parse (mu_mailcap_t mailcap, mu_stream_t input,
struct mu_locus_point const *pt)
{
int rc;
char *buffer = NULL;
size_t bufsize = 0;
size_t nread;
mu_opool_t acc = NULL;
mu_stream_t flt;
const char *argv[] = { "inline-comment", "#", "-i", "#", NULL };
int err = 0;
rc = mu_filter_create_args (&flt, input,
argv[0],
MU_ARRAY_SIZE (argv) - 1, argv,
MU_FILTER_DECODE, MU_STREAM_READ);
if (rc)
return rc;
mu_locus_range_init (&mailcap->locus);
if (pt)
{
mu_locus_point_copy (&mailcap->locus.beg, pt);
mu_locus_point_copy (&mailcap->locus.end, pt);
}
while ((rc = mu_stream_getline (flt, &buffer, &bufsize, &nread)) == 0)
{
mu_mailcap_entry_t entry;
int cont = acc && mu_opool_size (acc) > 0;
if (nread > 0)
{
buffer[--nread] = 0;
if (buffer[0] == '#')
{
unsigned long n;
char *p;
errno = 0;
n = strtoul (buffer + 2, &p, 10);
if (errno == 0 && (*p == 0 || mu_isspace (*p)))
mailcap->locus.beg.mu_line = mailcap->locus.end.mu_line = n;
continue;
}
else if (nread && buffer[nread-1] == '\\')
{
if (--nread > 0)
{
if (!acc)
{
rc = mu_opool_create (&acc, MU_OPOOL_DEFAULT);
if (rc)
break;
}
rc = mu_opool_append (acc, buffer, nread);
if (rc)
break;
}
mailcap->locus.end.mu_line++;
continue;
}
else if (cont)
{
char *p;
rc = mu_opool_append (acc, buffer, nread);
if (rc)
break;
rc = mu_opool_append_char (acc, 0);
if (rc)
break;
p = mu_opool_finish (acc, NULL);
rc = create_entry (mailcap, p, &entry);
mu_opool_clear (acc);
mailcap->locus.beg.mu_line = ++mailcap->locus.end.mu_line;
}
else if (nread == 0)
{
mailcap->locus.beg.mu_line = ++mailcap->locus.end.mu_line;
continue;
}
else
{
rc = create_entry (mailcap, buffer, &entry);
mailcap->locus.beg.mu_line = ++mailcap->locus.end.mu_line;
}
}
else if (cont)
{
/* Missing trailing newline */
char *p;
rc = mu_opool_append_char (acc, 0);
if (rc)
break;
p = mu_opool_finish (acc, NULL);
rc = create_entry (mailcap, p, &entry);
mu_opool_clear (acc);
}
else
break;
if (rc == 0)
{
if (mailcap->selector.selector
&& mailcap->selector.selector (entry, mailcap->selector.data) != 0)
{
mu_mailcap_entry_destroy (&entry);
}
else
{
mu_list_append (mailcap->elist, entry);
}
}
else if (rc == MU_ERR_PARSE)
err = 1;
else
break;
}
mu_stream_destroy (&flt);
mu_locus_range_deinit (&mailcap->locus);
mu_opool_destroy (&acc);
if (rc && err)
rc = MU_ERR_PARSE;
return rc;
}
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