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/* -----------------------------------------------------------------------------
* This file is part of SWIG, which is licensed as a whole under version 3
* (or any later version) of the GNU General Public License. Some additional
* terms also apply to certain portions of SWIG. The full details of the SWIG
* license and copyrights can be found in the LICENSE and COPYRIGHT files
* included with the SWIG source code as distributed by the SWIG developers
* and at https://www.swig.org/legal.html.
*
* getopt.c
*
* Handles the parsing of command line options. This is particularly nasty
* compared to other utilities given that command line options can potentially
* be read by many different modules within SWIG. Thus, in order to make sure
* there are no unrecognized options, each module is required to "mark"
* the options that it uses. Afterwards, we can make a quick scan to make
* sure there are no unmarked options.
*
* TODO:
* Should have cleaner error handling in general.
* ----------------------------------------------------------------------------- */
#include "swig.h"
static char **args;
static int numargs;
static int *marked;
/* -----------------------------------------------------------------------------
* Swig_init_args()
*
* Initialize the argument list handler.
* ----------------------------------------------------------------------------- */
void Swig_init_args(int argc, char **argv) {
assert(argc > 0);
assert(argv);
numargs = argc;
args = argv;
marked = (int *) Calloc(numargs, sizeof(int));
marked[0] = 1;
}
/* -----------------------------------------------------------------------------
* Swig_mark_arg()
*
* Marks an argument as being parsed.
* ----------------------------------------------------------------------------- */
void Swig_mark_arg(int n) {
assert(marked);
assert((n >= 0) && (n < numargs));
marked[n] = 1;
}
/* -----------------------------------------------------------------------------
* Swig_check_marked()
*
* Checks to see if argument has been picked up.
* ----------------------------------------------------------------------------- */
int Swig_check_marked(int n) {
assert((n >= 0) && (n < numargs));
return marked[n];
}
/* -----------------------------------------------------------------------------
* Swig_check_options()
*
* Checkers for unprocessed command line options and errors.
* ----------------------------------------------------------------------------- */
void Swig_check_options(int check_input) {
int error = 0;
int i;
int max = check_input ? numargs - 1 : numargs;
assert(marked);
for (i = 1; i < max; i++) {
if (!marked[i]) {
Printf(stderr, "swig error : Unrecognized option %s\n", args[i]);
error = 1;
}
}
if (error) {
Printf(stderr, "Use 'swig -help' for available options.\n");
Exit(EXIT_FAILURE);
}
if (check_input && marked[numargs - 1]) {
Printf(stderr, "Must specify an input file. Use -help for available options.\n");
Exit(EXIT_FAILURE);
}
}
/* -----------------------------------------------------------------------------
* Swig_arg_error()
*
* Generates a generic error message and exits.
* ----------------------------------------------------------------------------- */
void Swig_arg_error(void) {
Printf(stderr, "SWIG : Unable to parse command line options.\n");
Printf(stderr, "Use 'swig -help' for available options.\n");
Exit(EXIT_FAILURE);
}
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