/trunk/Source/Swig/getopt.c
# · C · 111 lines · 51 code · 14 blank · 46 comment · 8 complexity · d905b6d85a6f9e4a377afb207b48f254 MD5 · raw file
- /* -----------------------------------------------------------------------------
- * 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 http://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:
- * - This module needs to be modified so that it doesn't call exit().
- * Should have cleaner error handling in general.
- * ----------------------------------------------------------------------------- */
- char cvsroot_getopt_c[] = "$Id: getopt.c 11876 2010-02-27 23:53:33Z wsfulton $";
- #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) {
- int i;
- assert(argc > 0);
- assert(argv);
- numargs = argc;
- args = argv;
- marked = (int *) malloc(numargs * sizeof(int));
- for (i = 0; i < argc; i++) {
- marked[i] = 0;
- }
- 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(1);
- }
- if (check_input && marked[numargs - 1]) {
- Printf(stderr, "Must specify an input file. Use -help for available options.\n");
- exit(1);
- }
- }
- /* -----------------------------------------------------------------------------
- * 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(1);
- }