| 1 | /*---------------------------------------------------------------------------*
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| 2 | * <RCS keywords>
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| 3 | *
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| 4 | * C++ Library
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| 5 | *
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| 6 | * Copyright 1992-1994, David Gottner
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| 7 | *
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| 8 | * All Rights Reserved
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| 9 | *
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| 10 | * Permission to use, copy, modify, and distribute this software and its
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| 11 | * documentation for any purpose and without fee is hereby granted,
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| 12 | * provided that the above copyright notice, this permission notice and
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| 13 | * the following disclaimer notice appear unmodified in all copies.
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| 14 | *
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| 15 | * I DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL I
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| 17 | * BE LIABLE FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
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| 18 | * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER
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| 19 | * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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| 20 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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| 21 | *
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| 22 | * Nevertheless, I would like to know about bugs in this library or
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| 23 | * suggestions for improvment. Send bug reports and feedback to
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| 24 | * davegottner@delphi.com.
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| 25 | *---------------------------------------------------------------------------*/
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| 26 |
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| 27 | /* Modified to support --help and --version, as well as /? on Windows
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| 28 | * by Georg Brandl. */
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| 29 |
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| 30 | #include <stdio.h>
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| 31 | #include <string.h>
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| 32 |
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| 33 | #ifdef __cplusplus
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| 34 | extern "C" {
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| 35 | #endif
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| 36 |
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| 37 | int _PyOS_opterr = 1; /* generate error messages */
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| 38 | int _PyOS_optind = 1; /* index into argv array */
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| 39 | char *_PyOS_optarg = NULL; /* optional argument */
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| 40 | static char *opt_ptr = "";
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| 41 |
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| 42 | void _PyOS_ResetGetOpt(void)
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| 43 | {
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| 44 | _PyOS_opterr = 1;
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| 45 | _PyOS_optind = 1;
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| 46 | _PyOS_optarg = NULL;
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| 47 | opt_ptr = "";
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| 48 | }
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| 49 |
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| 50 | int _PyOS_GetOpt(int argc, char **argv, char *optstring)
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| 51 | {
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| 52 | char *ptr;
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| 53 | int option;
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| 54 |
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| 55 | if (*opt_ptr == '\0') {
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| 56 |
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| 57 | if (_PyOS_optind >= argc)
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| 58 | return -1;
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| 59 | #ifdef MS_WINDOWS
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| 60 | else if (strcmp(argv[_PyOS_optind], "/?") == 0) {
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| 61 | ++_PyOS_optind;
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| 62 | return 'h';
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| 63 | }
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| 64 | #endif
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| 65 |
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| 66 | else if (argv[_PyOS_optind][0] != '-' ||
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| 67 | argv[_PyOS_optind][1] == '\0' /* lone dash */ )
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| 68 | return -1;
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| 69 |
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| 70 | else if (strcmp(argv[_PyOS_optind], "--") == 0) {
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| 71 | ++_PyOS_optind;
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| 72 | return -1;
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| 73 | }
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| 74 |
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| 75 | else if (strcmp(argv[_PyOS_optind], "--help") == 0) {
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| 76 | ++_PyOS_optind;
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| 77 | return 'h';
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| 78 | }
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| 79 |
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| 80 | else if (strcmp(argv[_PyOS_optind], "--version") == 0) {
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| 81 | ++_PyOS_optind;
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| 82 | return 'V';
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| 83 | }
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| 84 |
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| 85 |
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| 86 | opt_ptr = &argv[_PyOS_optind++][1];
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| 87 | }
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| 88 |
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| 89 | if ((option = *opt_ptr++) == '\0')
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| 90 | return -1;
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| 91 |
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| 92 | if (option == 'J') {
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| 93 | if (_PyOS_opterr)
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| 94 | fprintf(stderr, "-J is reserved for Jython\n");
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| 95 | return '_';
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| 96 | }
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| 97 |
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| 98 | if (option == 'X') {
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| 99 | if (_PyOS_opterr)
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| 100 | fprintf(stderr,
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| 101 | "-X is reserved for implementation-specific arguments\n");
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| 102 | return '_';
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| 103 | }
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| 104 |
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| 105 | if ((ptr = strchr(optstring, option)) == NULL) {
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| 106 | if (_PyOS_opterr)
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| 107 | fprintf(stderr, "Unknown option: -%c\n", option);
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| 108 |
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| 109 | return '_';
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| 110 | }
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| 111 |
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| 112 | if (*(ptr + 1) == ':') {
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| 113 | if (*opt_ptr != '\0') {
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| 114 | _PyOS_optarg = opt_ptr;
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| 115 | opt_ptr = "";
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| 116 | }
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| 117 |
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| 118 | else {
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| 119 | if (_PyOS_optind >= argc) {
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| 120 | if (_PyOS_opterr)
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| 121 | fprintf(stderr,
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| 122 | "Argument expected for the -%c option\n", option);
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| 123 | return '_';
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| 124 | }
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| 125 |
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| 126 | _PyOS_optarg = argv[_PyOS_optind++];
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| 127 | }
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| 128 | }
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| 129 |
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| 130 | return option;
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| 131 | }
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| 132 |
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| 133 | #ifdef __cplusplus
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| 134 | }
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| 135 | #endif
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| 136 |
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