mh_getopt.c
2.91 KB
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This program 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 2, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Parse traditional MH options. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <mh_getopt.h>
#include <getopt.h>
int mh_optind = 1;
char *mh_optarg;
char *mh_optptr;
int
mh_getopt (int argc, char **argv, struct mh_option *mh_opt, const char *doc)
{
struct mh_option *p;
int optlen;
if (mh_optind >= argc || argv[mh_optind] == NULL)
return EOF;
mh_optptr = argv[mh_optind];
if (mh_optptr[0] == '+')
{
mh_optarg = mh_optptr + 1;
mh_optind++;
return '+';
}
if (mh_optptr[0] != '-')
return EOF;
optlen = strlen (mh_optptr+1);
for (p = mh_opt; p->opt; p++)
{
if ((p->match_len <= optlen
&& memcmp (mh_optptr+1, p->opt, optlen) == 0)
|| (p->flags == MH_OPT_BOOL
&& optlen > 2
&& memcmp (mh_optptr+1, "no", 2) == 0
&& strlen (p->opt) >= optlen-2
&& memcmp (mh_optptr+3, p->opt, optlen-2) == 0))
break;
}
if (p->opt)
{
switch (p->flags)
{
case MH_OPT_BOOL:
if (memcmp (mh_optptr+1, "no", 2) == 0)
mh_optarg = "no";
else
mh_optarg = "yes";
break;
case MH_OPT_ARG:
mh_optarg = argv[++mh_optind];
break;
default:
mh_optarg = NULL;
}
mh_optind++;
return p->key;
}
else if (!strcmp (mh_optptr+1, "help"))
{
mh_help (mh_opt, doc);
exit (1);
}
return '?';
}
void
mh_help (struct mh_option *mh_opt, const char *doc)
{
struct mh_option *p;
printf ("Compatibility syntax:\n");
printf ("%s [switches] %s\n", program_invocation_short_name, doc);
printf (" switches are:\n");
for (p = mh_opt; p->opt; p++)
{
int len = strlen (p->opt);
printf (" -");
if (p->flags == MH_OPT_BOOL)
printf ("[no]");
if (len > p->match_len)
printf ("(%*.*s)%s",
p->match_len, p->match_len, p->opt,
p->opt + p->match_len);
else
printf ("%s", p->opt);
if (p->flags == MH_OPT_ARG)
printf (" %s", p->arg);
printf ("\n");
}
printf (" -help\n");
printf ("\nPlease use GNU long options instead. Run %s --help for more info on these.\n", program_invocation_short_name);
}