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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2011-2012 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <mailutils/types.h>
#include <mailutils/errno.h>
#include <mailutils/list.h>
#include <mailutils/iterator.h>
#include <mailutils/mailbox.h>
#include <mailutils/msgset.h>
#include <mailutils/sys/msgset.h>
/* This structure keeps parser state while parsing message set. */
struct parse_msgnum_env
{
const char *s; /* Current position in string */
size_t minval; /* Min. sequence number or UID */
size_t maxval; /* Max. sequence number or UID */
mu_msgset_t msgset; /* Message set being built. */
int mode; /* Operation mode (num/uid) */
};
/* Get a single message number/UID from env->s and store it into *PN.
Return 0 on success and error code on error.
Advance env->s to the point past the parsed message number.
*/
static int
get_msgnum (struct parse_msgnum_env *env, size_t *pn)
{
size_t msgnum;
char *p;
errno = 0;
msgnum = strtoul (env->s, &p, 10);
if (msgnum == ULONG_MAX && errno == ERANGE)
return MU_ERR_PARSE;
env->s = p;
if (env->msgset->mbox && env->maxval && msgnum > env->maxval)
msgnum = env->maxval;
*pn = msgnum;
return 0;
}
/* Parse a single message range (A:B). Treat '*' as the largest number/UID
in use. */
static int
parse_msgrange (struct parse_msgnum_env *env)
{
int rc;
struct mu_msgrange msgrange;
if (*env->s == '*')
{
msgrange.msg_beg = env->maxval;
env->s++;
}
else if ((rc = get_msgnum (env, &msgrange.msg_beg)))
return rc;
if (*env->s == ':')
{
if (*++env->s == '*')
{
msgrange.msg_end = env->maxval;
++env->s;
}
else if (*env->s == 0)
return MU_ERR_PARSE;
else if ((rc = get_msgnum (env, &msgrange.msg_end)))
return rc;
}
else
msgrange.msg_end = msgrange.msg_beg;
if (msgrange.msg_end && msgrange.msg_end < msgrange.msg_beg)
{
size_t tmp = msgrange.msg_end;
msgrange.msg_end = msgrange.msg_beg;
msgrange.msg_beg = tmp;
}
return mu_msgset_add_range (env->msgset, msgrange.msg_beg, msgrange.msg_end,
env->mode);
}
/* Parse IMAP-style message set specification S.
On success, return 0 and populate MSET with the resulting message ranges.
On error, return error code and point END to the position in the input
string where parsing has failed. */
int
mu_msgset_parse_imap (mu_msgset_t mset, int mode, const char *s, char **end)
{
int rc;
struct parse_msgnum_env env;
if (!s || !mset)
return EINVAL;
if (end)
*end = (char*) s;
if (!*s)
return MU_ERR_PARSE;
memset (&env, 0, sizeof (env));
env.s = s;
env.msgset = mset;
env.minval = 1;
env.mode = mode;
if (mset->mbox)
{
size_t lastmsgno; /* Max. sequence number. */
rc = mu_mailbox_messages_count (mset->mbox, &lastmsgno);
if (rc == 0)
{
if (mode == MU_MSGSET_UID)
{
rc = mu_mailbox_translate (mset->mbox, MU_MAILBOX_MSGNO_TO_UID,
lastmsgno, &env.maxval);
if (rc == 0)
rc = mu_mailbox_translate (mset->mbox, MU_MAILBOX_MSGNO_TO_UID,
1, &env.minval);
}
else
env.maxval = lastmsgno;
}
if (rc)
return rc;
}
while ((rc = parse_msgrange (&env)) == 0 && *env.s)
{
if (*env.s != ',' || *++env.s == 0)
{
rc = MU_ERR_PARSE;
break;
}
}
if (end)
*end = (char*) env.s;
return rc;
}
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