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GeezerVison is showing github.com — cpython/Python/getopt.c at main · python/cpython Expand file tree/ Copy pathgetopt.cMore file actions 187 lines (164 loc) · 5.12 KB / Copy pathgetopt.cFile metadata and controls187 lines (164 loc) · 5.12 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 /*---------------------------------------------------------------------------* * <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" // struct _PyOS_GetOpt /* Python command line short and long options */ #define SHORT_OPTS L"bBc:dEhiIm:OPqRsStuvVW:xX:?" typedef struct { const wchar_t *name; int has_arg; int val; } _PyOS_LongOption; static const _PyOS_LongOption longopts[] = { /* name, has_arg, val (used in switch in initconfig.c) */ {L"check-hash-based-pycs", 1, 1}, {L"help-all", 0, 2}, {L"help-env", 0, 3}, {L"help-xoptions", 0, 4}, {NULL, 0, -1}, /* sentinel */ }; void _PyOS_GetOpt_Init(struct _PyOS_GetOpt *getopt, Py_ssize_t argc, wchar_t * const *argv) { getopt->error = 1; getopt->index = 1; getopt->arg = NULL; getopt->ptr = L""; getopt->argc = argc; getopt->argv = argv; } // Parse a command line option. // // Return a character for short option (ex: return 'h' for -h). // Return a number for long options (see 'longopts' array). // Return '_' on unknown option or missing argument. // Return -1 when done. // // Return 'h' for --help and return 'V' for --version. // // If an option has an argument, set getopt->arg to the argument. // If getopt->error is non-error, write error messages to stderr. int _PyOS_GetOpt(struct _PyOS_GetOpt *getopt) { // Local copy of read-only members to omit "getopt->" const Py_ssize_t argc = getopt->argc; wchar_t * const *argv = getopt->argv; const int error = getopt->error; if (*getopt->ptr == '\0') { if (getopt->index >= argc) { return -1; } const wchar_t *arg = argv[getopt->index]; #ifdef MS_WINDOWS if (wcscmp(arg, L"/?") == 0) { ++getopt->index; return 'h'; } #endif if (arg[0] != L'-' || arg[1] == L'\0' /* lone dash */ ) { return -1; } if (wcscmp(arg, L"--") == 0) { ++getopt->index; return -1; } if (wcscmp(arg, L"--help") == 0) { ++getopt->index; return 'h'; } if (wcscmp(arg, L"--version") == 0) { ++getopt->index; return 'V'; } getopt->ptr = &argv[getopt->index++][1]; } wchar_t option = *getopt->ptr++; if (option == L'\0') { return -1; } if (option == L'-') { // Parse long option. if (*getopt->ptr == L'\0') { if (error) { fprintf(stderr, "Expected long option\n"); } return -1; } int longindex = 0; const _PyOS_LongOption *opt; for (opt = &longopts[longindex]; opt->name; opt = &longopts[++longindex]) { if (wcscmp(opt->name, getopt->ptr) == 0) { break; } } if (!opt->name) { if (error) { fprintf(stderr, "Invalid option '%ls'\n", argv[getopt->index - 1]); } return '_'; } getopt->ptr = L""; if (!opt->has_arg) { return opt->val; } if (getopt->index >= argc) { if (error) { fprintf(stderr, "Argument expected for the %ls options\n", argv[getopt->index - 1]); } return '_'; } getopt->arg = argv[getopt->index++]; return opt->val; } wchar_t *ptr = wcschr(SHORT_OPTS, option); if (ptr == NULL) { if (error) { fprintf(stderr, "Invalid option '-%lc'\n", (wint_t)option); } return '_'; } if (*(ptr + 1) == L':') { if (*getopt->ptr != L'\0') { getopt->arg = getopt->ptr; getopt->ptr = L""; } else { if (getopt->index >= argc) { if (error) { fprintf(stderr, "Argument expected for the -%lc option\n", (wint_t)option); } return '_'; } getopt->arg = argv[getopt->index++]; } } return option; } |
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