1 /*---------------------------------------------------------------------------*
2 * <RCS keywords>
3 *
4 * C++ Library
5 *
6 * Copyright 1992-1994, David Gottner
7 *
8 * All Rights Reserved
9 *
10 * Permission to use, copy, modify, and distribute this software and its
11 * documentation for any purpose and without fee is hereby granted,
12 * provided that the above copyright notice, this permission notice and
13 * the following disclaimer notice appear unmodified in all copies.
14 *
15 * I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
17 * BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
18 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
19 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
20 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 *---------------------------------------------------------------------------*/
22
23 /* Modified to support --help and --version, as well as /? on Windows
24 * by Georg Brandl. */
25
26 #include <Python.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <wchar.h>
30 #include "pycore_getopt.h"
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 int _PyOS_opterr = 1; /* generate error messages */
37 Py_ssize_t _PyOS_optind = 1; /* index into argv array */
38 const wchar_t *_PyOS_optarg = NULL; /* optional argument */
39
40 static const wchar_t *opt_ptr = L"";
41
42 /* Python command line short and long options */
43
44 #define SHORT_OPTS L"bBc:dEhiIJm:OPqRsStuvVW:xX:?"
45
46 static const _PyOS_LongOption longopts[] = {
47 /* name, has_arg, val (used in switch in initconfig.c) */
48 {L"check-hash-based-pycs", 1, 0},
49 {L"help-all", 0, 1},
50 {L"help-env", 0, 2},
51 {L"help-xoptions", 0, 3},
52 {NULL, 0, -1}, /* sentinel */
53 };
54
55
56 void _PyOS_ResetGetOpt(void)
57 {
58 _PyOS_opterr = 1;
59 _PyOS_optind = 1;
60 _PyOS_optarg = NULL;
61 opt_ptr = L"";
62 }
63
64 int _PyOS_GetOpt(Py_ssize_t argc, wchar_t * const *argv, int *longindex)
65 {
66 wchar_t *ptr;
67 wchar_t option;
68
69 if (*opt_ptr == '\0') {
70
71 if (_PyOS_optind >= argc)
72 return -1;
73 #ifdef MS_WINDOWS
74 else if (wcscmp(argv[_PyOS_optind], L"/?") == 0) {
75 ++_PyOS_optind;
76 return 'h';
77 }
78 #endif
79
80 else if (argv[_PyOS_optind][0] != L'-' ||
81 argv[_PyOS_optind][1] == L'\0' /* lone dash */ )
82 return -1;
83
84 else if (wcscmp(argv[_PyOS_optind], L"--") == 0) {
85 ++_PyOS_optind;
86 return -1;
87 }
88
89 else if (wcscmp(argv[_PyOS_optind], L"--help") == 0) {
90 ++_PyOS_optind;
91 return 'h';
92 }
93
94 else if (wcscmp(argv[_PyOS_optind], L"--version") == 0) {
95 ++_PyOS_optind;
96 return 'V';
97 }
98
99 opt_ptr = &argv[_PyOS_optind++][1];
100 }
101
102 if ((option = *opt_ptr++) == L'\0')
103 return -1;
104
105 if (option == L'-') {
106 // Parse long option.
107 if (*opt_ptr == L'\0') {
108 if (_PyOS_opterr) {
109 fprintf(stderr, "expected long option\n");
110 }
111 return -1;
112 }
113 *longindex = 0;
114 const _PyOS_LongOption *opt;
115 for (opt = &longopts[*longindex]; opt->name; opt = &longopts[++(*longindex)]) {
116 if (!wcscmp(opt->name, opt_ptr))
117 break;
118 }
119 if (!opt->name) {
120 if (_PyOS_opterr) {
121 fprintf(stderr, "unknown option %ls\n", argv[_PyOS_optind - 1]);
122 }
123 return '_';
124 }
125 opt_ptr = L"";
126 if (!opt->has_arg) {
127 return opt->val;
128 }
129 if (_PyOS_optind >= argc) {
130 if (_PyOS_opterr) {
131 fprintf(stderr, "Argument expected for the %ls options\n",
132 argv[_PyOS_optind - 1]);
133 }
134 return '_';
135 }
136 _PyOS_optarg = argv[_PyOS_optind++];
137 return opt->val;
138 }
139
140 if (option == 'J') {
141 if (_PyOS_opterr) {
142 fprintf(stderr, "-J is reserved for Jython\n");
143 }
144 return '_';
145 }
146
147 if ((ptr = wcschr(SHORT_OPTS, option)) == NULL) {
148 if (_PyOS_opterr) {
149 fprintf(stderr, "Unknown option: -%c\n", (char)option);
150 }
151 return '_';
152 }
153
154 if (*(ptr + 1) == L':') {
155 if (*opt_ptr != L'\0') {
156 _PyOS_optarg = opt_ptr;
157 opt_ptr = L"";
158 }
159
160 else {
161 if (_PyOS_optind >= argc) {
162 if (_PyOS_opterr) {
163 fprintf(stderr,
164 "Argument expected for the -%c option\n", (char)option);
165 }
166 return '_';
167 }
168
169 _PyOS_optarg = argv[_PyOS_optind++];
170 }
171 }
172
173 return option;
174 }
175
176 #ifdef __cplusplus
177 }
178 #endif
179