/*---------------------------------------------------------------------------*
 * <RCS keywords>
 *
 * C++ Library
 *
 * Copyright 1992-1994, David Gottner
 *
 * All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice, this permission notice and
 * the following disclaimer notice appear unmodified in all copies.
 *
 * I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
 * BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Nevertheless, I would like to know about bugs in this library or
 * suggestions for improvment. Send bug reports and feedback to
 * davegottner@delphi.com.
 *---------------------------------------------------------------------------*/

/* Modified to support --help and --version, as well as /? on Windows
 * by Georg Brandl. */

#include <Python.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include "internal/pygetopt.h"

#ifdef __cplusplus
extern "C" {
#endif

int _PyOS_opterr = 1; /* generate error messages */
int _PyOS_optind = 1; /* index into argv array */
wchar_t *_PyOS_optarg = NULL; /* optional argument */

static wchar_t *opt_ptr = L"";

void _PyOS_ResetGetOpt(void)
{
 _PyOS_opterr = 1;
 _PyOS_optind = 1;
 _PyOS_optarg = NULL;
 opt_ptr = L"";
}

int _PyOS_GetOpt(int argc, wchar_t **argv, wchar_t *optstring,
 const _PyOS_LongOption *longopts, int *longindex)
{
 wchar_t *ptr;
 wchar_t option;

 if (*opt_ptr == '0円') {

 if (_PyOS_optind >= argc)
 return -1;
#ifdef MS_WINDOWS
 else if (wcscmp(argv[_PyOS_optind], L"/?") == 0) {
 ++_PyOS_optind;
 return 'h';
 }
#endif

 else if (argv[_PyOS_optind][0] != L'-' ||
 argv[_PyOS_optind][1] == L'0円' /* lone dash */ )
 return -1;

 else if (wcscmp(argv[_PyOS_optind], L"--") == 0) {
 ++_PyOS_optind;
 return -1;
 }

 else if (wcscmp(argv[_PyOS_optind], L"--help") == 0) {
 ++_PyOS_optind;
 return 'h';
 }

 else if (wcscmp(argv[_PyOS_optind], L"--version") == 0) {
 ++_PyOS_optind;
 return 'V';
 }

 opt_ptr = &argv[_PyOS_optind++][1];
 }

 if ((option = *opt_ptr++) == L'0円')
 return -1;

 if (option == L'-') {
 // Parse long option.
 if (*opt_ptr == L'0円') {
 fprintf(stderr, "expected long option\n");
 return -1;
 }
 *longindex = 0;
 const _PyOS_LongOption *opt;
 for (opt = &longopts[*longindex]; opt->name; opt = &longopts[++(*longindex)]) {
 if (!wcscmp(opt->name, opt_ptr))
 break;
 }
 if (!opt->name) {
 fprintf(stderr, "unknown option %ls\n", argv[_PyOS_optind - 1]);
 return '_';
 }
 opt_ptr = L"";
 if (!opt->has_arg) {
 return opt->val;
 }
 if (_PyOS_optind >= argc) {
 fprintf(stderr, "Argument expected for the %ls options\n",
 argv[_PyOS_optind - 1]);
 return '_';
 }
 _PyOS_optarg = argv[_PyOS_optind++];
 return opt->val;
 }

 if (option == 'J') {
 if (_PyOS_opterr)
 fprintf(stderr, "-J is reserved for Jython\n");
 return '_';
 }

 if ((ptr = wcschr(optstring, option)) == NULL) {
 if (_PyOS_opterr)
 fprintf(stderr, "Unknown option: -%c\n", (char)option);
 return '_';
 }

 if (*(ptr + 1) == L':') {
 if (*opt_ptr != L'0円') {
 _PyOS_optarg = opt_ptr;
 opt_ptr = L"";
 }

 else {
 if (_PyOS_optind >= argc) {
 if (_PyOS_opterr)
 fprintf(stderr,
 "Argument expected for the -%c option\n", (char)option);
 return '_';
 }

 _PyOS_optarg = argv[_PyOS_optind++];
 }
 }

 return option;
}

#ifdef __cplusplus
}
#endif