55377bdc08
Exit() is a wrapper for exit() by default, but SetExitHandler() allows specifying a function to call instead. This means that failures within DOH (e.g. Malloc() failing due to lack of memory) will now perform cleanup such as removing output files. This commit also cleans up exit statuses so SWIG should now reliably exit with status 0 if the run was successful and status 1 if there was an error (or a warning and -Werror was in effect). Previously in some situations SWIG would try to exit with the status set to the number of errors encountered, but that's problematic - for example if there were 256 errors this would result in exit status 0 on most platforms. Also some error statuses have special meanings e.g. those defined by <sysexits.h>. Also SWIG/Javascript tried to exit with status -1 in a few places (which typically results in exit status 255).
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* -----------------------------------------------------------------------------
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* This file is part of SWIG, which is licensed as a whole under version 3
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* (or any later version) of the GNU General Public License. Some additional
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* terms also apply to certain portions of SWIG. The full details of the SWIG
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* license and copyrights can be found in the LICENSE and COPYRIGHT files
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* included with the SWIG source code as distributed by the SWIG developers
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* and at http://www.swig.org/legal.html.
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*
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* getopt.c
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*
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* Handles the parsing of command line options. This is particularly nasty
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* compared to other utilities given that command line options can potentially
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* be read by many different modules within SWIG. Thus, in order to make sure
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* there are no unrecognized options, each module is required to "mark"
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* the options that it uses. Afterwards, we can make a quick scan to make
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* sure there are no unmarked options.
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*
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* TODO:
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* Should have cleaner error handling in general.
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* ----------------------------------------------------------------------------- */
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#include "swig.h"
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static char **args;
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static int numargs;
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static int *marked;
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/* -----------------------------------------------------------------------------
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* Swig_init_args()
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*
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* Initialize the argument list handler.
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* ----------------------------------------------------------------------------- */
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void Swig_init_args(int argc, char **argv) {
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assert(argc > 0);
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assert(argv);
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numargs = argc;
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args = argv;
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marked = (int *) Calloc(numargs, sizeof(int));
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marked[0] = 1;
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}
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/* -----------------------------------------------------------------------------
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* Swig_mark_arg()
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*
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* Marks an argument as being parsed.
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* ----------------------------------------------------------------------------- */
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void Swig_mark_arg(int n) {
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assert(marked);
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assert((n >= 0) && (n < numargs));
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marked[n] = 1;
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}
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/* -----------------------------------------------------------------------------
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* Swig_check_marked()
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*
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* Checks to see if argument has been picked up.
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* ----------------------------------------------------------------------------- */
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int Swig_check_marked(int n) {
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assert((n >= 0) && (n < numargs));
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return marked[n];
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}
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/* -----------------------------------------------------------------------------
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* Swig_check_options()
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*
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* Checkers for unprocessed command line options and errors.
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* ----------------------------------------------------------------------------- */
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void Swig_check_options(int check_input) {
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int error = 0;
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int i;
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int max = check_input ? numargs - 1 : numargs;
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assert(marked);
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for (i = 1; i < max; i++) {
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if (!marked[i]) {
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Printf(stderr, "swig error : Unrecognized option %s\n", args[i]);
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error = 1;
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}
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}
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if (error) {
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Printf(stderr, "Use 'swig -help' for available options.\n");
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Exit(EXIT_FAILURE);
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}
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if (check_input && marked[numargs - 1]) {
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Printf(stderr, "Must specify an input file. Use -help for available options.\n");
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Exit(EXIT_FAILURE);
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}
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}
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/* -----------------------------------------------------------------------------
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* Swig_arg_error()
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*
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* Generates a generic error message and exits.
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* ----------------------------------------------------------------------------- */
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void Swig_arg_error(void) {
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Printf(stderr, "SWIG : Unable to parse command line options.\n");
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Printf(stderr, "Use 'swig -help' for available options.\n");
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Exit(EXIT_FAILURE);
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}
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