/*---------------------------------------------------------------------------* 
 * <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. 
 *---------------------------------------------------------------------------*/ 
 
/* 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 "pycore_getopt.h"
 
#ifdef __cplusplus 
extern "C" { 
#endif 
 
int _PyOS_opterr = 1;                 /* generate error messages */
Py_ssize_t _PyOS_optind = 1;          /* index into argv array   */
const wchar_t *_PyOS_optarg = NULL;   /* optional argument       */
 
static const wchar_t *opt_ptr = L"";
 
/* Python command line short and long options */

#define SHORT_OPTS L"bBc:dEhiIJm:OqRsStuvVW:xX:?"

static const _PyOS_LongOption longopts[] = {
    {L"check-hash-based-pycs", 1, 0},
    {NULL, 0, 0},
};


void _PyOS_ResetGetOpt(void) 
{ 
    _PyOS_opterr = 1; 
    _PyOS_optind = 1; 
    _PyOS_optarg = NULL; 
    opt_ptr = L""; 
} 
 
int _PyOS_GetOpt(Py_ssize_t argc, wchar_t * const *argv, int *longindex)
{ 
    wchar_t *ptr; 
    wchar_t option; 
 
    if (*opt_ptr == '\0') { 
 
        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' /* 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') 
        return -1; 
 
    if (option == L'-') { 
        // Parse long option. 
        if (*opt_ptr == L'\0') { 
            if (_PyOS_opterr) {
                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) { 
            if (_PyOS_opterr) {
                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) { 
            if (_PyOS_opterr) {
                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(SHORT_OPTS, option)) == NULL) {
        if (_PyOS_opterr) {
            fprintf(stderr, "Unknown option: -%c\n", (char)option); 
        }
        return '_'; 
    } 
 
    if (*(ptr + 1) == L':') { 
        if (*opt_ptr != L'\0') { 
            _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