Line data Source code
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 : * Nevertheless, I would like to know about bugs in this library or
23 : * suggestions for improvment. Send bug reports and feedback to
24 : * davegottner@delphi.com.
25 : *---------------------------------------------------------------------------*/
26 :
27 : /* Modified to support --help and --version, as well as /? on Windows
28 : * by Georg Brandl. */
29 :
30 : #include <stdio.h>
31 : #include <string.h>
32 :
33 : #ifdef __cplusplus
34 : extern "C" {
35 : #endif
36 :
37 : int _PyOS_opterr = 1; /* generate error messages */
38 : int _PyOS_optind = 1; /* index into argv array */
39 : char *_PyOS_optarg = NULL; /* optional argument */
40 : static char *opt_ptr = "";
41 :
42 3 : void _PyOS_ResetGetOpt(void)
43 : {
44 3 : _PyOS_opterr = 1;
45 3 : _PyOS_optind = 1;
46 3 : _PyOS_optarg = NULL;
47 3 : opt_ptr = "";
48 3 : }
49 :
50 12 : int _PyOS_GetOpt(int argc, char **argv, char *optstring)
51 : {
52 : char *ptr;
53 : int option;
54 :
55 12 : if (*opt_ptr == '\0') {
56 :
57 12 : if (_PyOS_optind >= argc)
58 0 : return -1;
59 : #ifdef MS_WINDOWS
60 : else if (strcmp(argv[_PyOS_optind], "/?") == 0) {
61 : ++_PyOS_optind;
62 : return 'h';
63 : }
64 : #endif
65 :
66 18 : else if (argv[_PyOS_optind][0] != '-' ||
67 6 : argv[_PyOS_optind][1] == '\0' /* lone dash */ )
68 6 : return -1;
69 :
70 6 : else if (strcmp(argv[_PyOS_optind], "--") == 0) {
71 0 : ++_PyOS_optind;
72 0 : return -1;
73 : }
74 :
75 6 : else if (strcmp(argv[_PyOS_optind], "--help") == 0) {
76 0 : ++_PyOS_optind;
77 0 : return 'h';
78 : }
79 :
80 6 : else if (strcmp(argv[_PyOS_optind], "--version") == 0) {
81 0 : ++_PyOS_optind;
82 0 : return 'V';
83 : }
84 :
85 :
86 6 : opt_ptr = &argv[_PyOS_optind++][1];
87 : }
88 :
89 6 : if ((option = *opt_ptr++) == '\0')
90 0 : return -1;
91 :
92 6 : if (option == 'J') {
93 0 : if (_PyOS_opterr)
94 0 : fprintf(stderr, "-J is reserved for Jython\n");
95 0 : return '_';
96 : }
97 :
98 6 : if (option == 'X') {
99 0 : if (_PyOS_opterr)
100 0 : fprintf(stderr,
101 : "-X is reserved for implementation-specific arguments\n");
102 0 : return '_';
103 : }
104 :
105 6 : if ((ptr = strchr(optstring, option)) == NULL) {
106 0 : if (_PyOS_opterr)
107 0 : fprintf(stderr, "Unknown option: -%c\n", option);
108 :
109 0 : return '_';
110 : }
111 :
112 6 : if (*(ptr + 1) == ':') {
113 0 : if (*opt_ptr != '\0') {
114 0 : _PyOS_optarg = opt_ptr;
115 0 : opt_ptr = "";
116 : }
117 :
118 : else {
119 0 : if (_PyOS_optind >= argc) {
120 0 : if (_PyOS_opterr)
121 0 : fprintf(stderr,
122 : "Argument expected for the -%c option\n", option);
123 0 : return '_';
124 : }
125 :
126 0 : _PyOS_optarg = argv[_PyOS_optind++];
127 : }
128 : }
129 :
130 6 : return option;
131 : }
132 :
133 : #ifdef __cplusplus
134 : }
135 : #endif
136 :
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