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/* cgetopt.cc provide access to the C getopt library.
Copyright (C) 2009-2022 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 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 Modula-2 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>
#include <m2rts.h>
extern "C" {char *cgetopt_optarg;}
extern "C" {int cgetopt_optind;}
extern "C" {int cgetopt_opterr;}
extern "C" {int cgetopt_optopt;}
extern "C" char
cgetopt_getopt (int argc, char *argv[], char *optstring)
{
char r = getopt (argc, argv, optstring);
cgetopt_optarg = optarg;
cgetopt_optind = optind;
cgetopt_opterr = opterr;
cgetopt_optopt = optopt;
if (r == (char)-1)
return (char)0;
return r;
}
extern "C" int
cgetopt_getopt_long (int argc, char *argv[], char *optstring,
const struct option *longopts, int *longindex)
{
int r = getopt_long (argc, argv, optstring, longopts, longindex);
cgetopt_optarg = optarg;
cgetopt_optind = optind;
cgetopt_opterr = opterr;
cgetopt_optopt = optopt;
return r;
}
extern "C" int
cgetopt_getopt_long_only (int argc, char *argv[], char *optstring,
const struct option *longopts, int *longindex)
{
int r = getopt_long_only (argc, argv, optstring, longopts, longindex);
cgetopt_optarg = optarg;
cgetopt_optind = optind;
cgetopt_opterr = opterr;
cgetopt_optopt = optopt;
return r;
}
typedef struct cgetopt_Options_s
{
struct option *cinfo;
unsigned int high;
} cgetopt_Options;
/* InitOptions a constructor for Options. */
extern "C" cgetopt_Options *
cgetopt_InitOptions (void)
{
cgetopt_Options *o = (cgetopt_Options *)malloc (sizeof (cgetopt_Options));
o->cinfo = (struct option *)malloc (sizeof (struct option));
o->high = 0;
return o;
}
/* KillOptions a deconstructor for Options. Returns NULL after freeing
up all allocated memory associated with o. */
extern "C" cgetopt_Options *
cgetopt_KillOptions (cgetopt_Options *o)
{
free (o->cinfo);
free (o);
return NULL;
}
/* SetOption set option[index] with {name, has_arg, flag, val}. */
extern "C" void
cgetopt_SetOption (cgetopt_Options *o, unsigned int index, char *name,
unsigned int has_arg, int *flag, int val)
{
if (index > o->high)
{
o->cinfo
= (struct option *)malloc (sizeof (struct option) * (index + 1));
o->high = index + 1;
}
o->cinfo[index].name = name;
o->cinfo[index].has_arg = has_arg;
o->cinfo[index].flag = flag;
o->cinfo[index].val = val;
}
/* GetLongOptionArray returns a pointer to the C array containing all
long options. */
extern "C" struct option *
cgetopt_GetLongOptionArray (cgetopt_Options *o)
{
return o->cinfo;
}
/* GNU Modula-2 linking fodder. */
extern "C" void
_M2_cgetopt_init (int, char *argv[], char *env[])
{
}
extern "C" void
_M2_cgetopt_fini (int, char *argv[], char *env[])
{
}
extern "C" void
_M2_cgetopt_dep (void)
{
}
extern "C" void __attribute__((__constructor__))
_M2_cgetopt_ctor (void)
{
M2RTS_RegisterModule ("cgetopt", _M2_cgetopt_init, _M2_cgetopt_fini,
_M2_cgetopt_dep);
}
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