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/* vi: set sw=4 ts=4: */
/*
* universal getopt_ulflags implementation for busybox
*
* Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <getopt.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "libbb.h"
/*
You can set bb_opt_complementaly as string with one or more
complementaly or incongruously options.
If sequential founded option haved from this string
then your incongruously pairs unsets and complementaly make add sets.
Format:
one char - option for check,
chars - complementaly option for add sets.
- chars - option triggered for unsets.
~ chars - option incongruously.
* - option list, called add_to_list(*ptr_from_usaged, optarg)
: - separator.
Example: du applet can have options "-s" and "-d size"
If getopt found -s then -d option flag unset or if found -d then -s unset.
For this result you must set bb_opt_complementaly = "s-d:d-s".
Result have last option flag only from called arguments.
Warning! You can check returned flag, pointer to "d:" argument seted
to own optarg always.
Example two: cut applet must only one type of list may be specified,
and -b, -c and -f incongruously option, overwited option is error also.
You must set bb_opt_complementaly = "b~cf:c~bf:f~bc".
If called have more one specified, return value have error flag -
high bite set (0x80000000UL).
Example three: grep applet can have one or more "-e pattern" arguments.
You should use bb_getopt_ulflags() as
llist_t *paterns;
bb_opt_complementaly = "e*";
bb_getopt_ulflags (argc, argv, "e:", &paterns);
*/
const char *bb_opt_complementaly;
typedef struct
{
unsigned char opt;
char list_flg;
unsigned long switch_on;
unsigned long switch_off;
unsigned long incongruously;
void **optarg; /* char **optarg or llist_t **optarg */
} t_complementaly;
/* You can set bb_applet_long_options for parse called long options */
static const struct option bb_default_long_options[] = {
/* { "help", 0, NULL, '?' }, */
{ 0, 0, 0, 0 }
};
const struct option *bb_applet_long_options = bb_default_long_options;
unsigned long
bb_getopt_ulflags (int argc, char **argv, const char *applet_opts, ...)
{
unsigned long flags = 0;
t_complementaly complementaly[sizeof(flags) * 8 + 1];
int c;
const unsigned char *s;
t_complementaly *on_off;
va_list p;
va_start (p, applet_opts);
/* skip GNU extension */
s = applet_opts;
if(*s == '+' || *s == '-')
s++;
c = 0;
on_off = complementaly;
for (; *s; s++) {
if(c >= (sizeof(flags)*8))
break;
on_off->opt = *s;
on_off->switch_on = (1 << c);
on_off->list_flg = 0;
on_off->switch_off = 0;
on_off->incongruously = 0;
on_off->optarg = NULL;
if (s[1] == ':') {
on_off->optarg = va_arg (p, void **);
do
s++;
while (s[1] == ':');
}
on_off++;
c++;
}
on_off->opt = 0;
c = 0;
for (s = bb_opt_complementaly; s && *s; s++) {
t_complementaly *pair;
if (*s == ':') {
c = 0;
continue;
}
if (c)
continue;
for (on_off = complementaly; on_off->opt; on_off++)
if (on_off->opt == *s)
break;
pair = on_off;
for(s++; *s && *s != ':'; s++) {
if (*s == '-' || *s == '~') {
c = *s;
} else if(*s == '*') {
pair->list_flg++;
} else {
unsigned long *pair_switch = &(pair->switch_on);
if(c)
pair_switch = c == '-' ? &(pair->switch_off) : &(pair->incongruously);
for (on_off = complementaly; on_off->opt; on_off++)
if (on_off->opt == *s) {
*pair_switch |= on_off->switch_on;
break;
}
}
}
s--;
}
while ((c = getopt_long (argc, argv, applet_opts,
bb_applet_long_options, NULL)) > 0) {
for (on_off = complementaly; on_off->opt != c; on_off++) {
if(!on_off->opt)
bb_show_usage ();
}
if(flags & on_off->incongruously)
flags |= 0x80000000UL;
flags &= ~on_off->switch_off;
flags |= on_off->switch_on;
if(on_off->list_flg) {
*(llist_t **)(on_off->optarg) =
llist_add_to(*(llist_t **)(on_off->optarg), optarg);
} else if (on_off->optarg) {
*(char **)(on_off->optarg) = optarg;
}
}
return flags;
}
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