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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: getopt * * Copyright (C) 2000 - 2020, Intel Corp. * *****************************************************************************/ /* * ACPICA getopt() implementation * * Option strings: * "f" - Option has no arguments * "f:" - Option requires an argument * "f+" - Option has an optional argument * "f^" - Option has optional single-char sub-options * "f|" - Option has required single-char sub-options */ #include <acpi/acpi.h> #include "accommon.h" #include "acapps.h" #define ACPI_OPTION_ERROR(msg, badchar) \ if (acpi_gbl_opterr) {fprintf (stderr, "%s%c\n", msg, badchar);} int acpi_gbl_opterr = 1; int acpi_gbl_optind = 1; int acpi_gbl_sub_opt_char = 0; char *acpi_gbl_optarg; static int current_char_ptr = 1; /******************************************************************************* * * FUNCTION: acpi_getopt_argument * * PARAMETERS: argc, argv - from main * * RETURN: 0 if an argument was found, -1 otherwise. Sets acpi_gbl_Optarg * to point to the next argument. * * DESCRIPTION: Get the next argument. Used to obtain arguments for the * two-character options after the original call to acpi_getopt. * Note: Either the argument starts at the next character after * the option, or it is pointed to by the next argv entry. * (After call to acpi_getopt, we need to backup to the previous * argv entry). * ******************************************************************************/ int acpi_getopt_argument(int argc, char **argv) { acpi_gbl_optind--; current_char_ptr++; if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { acpi_gbl_optarg = &argv[acpi_gbl_optind++][(int)(current_char_ptr + 1)]; } else if (++acpi_gbl_optind >= argc) { ACPI_OPTION_ERROR("\nOption requires an argument", 0); current_char_ptr = 1; return (-1); } else { acpi_gbl_optarg = argv[acpi_gbl_optind++]; } current_char_ptr = 1; return (0); } /******************************************************************************* * * FUNCTION: acpi_getopt * * PARAMETERS: argc, argv - from main * opts - options info list * * RETURN: Option character or ACPI_OPT_END * * DESCRIPTION: Get the next option * ******************************************************************************/ int acpi_getopt(int argc, char **argv, char *opts) { int current_char; char *opts_ptr; if (current_char_ptr == 1) { if (acpi_gbl_optind >= argc || argv[acpi_gbl_optind][0] != '-' || argv[acpi_gbl_optind][1] == '\0') { return (ACPI_OPT_END); } else if (strcmp(argv[acpi_gbl_optind], "--") == 0) { acpi_gbl_optind++; return (ACPI_OPT_END); } } /* Get the option */ current_char = argv[acpi_gbl_optind][current_char_ptr]; /* Make sure that the option is legal */ if (current_char == ':' || (opts_ptr = strchr(opts, current_char)) == NULL) { ACPI_OPTION_ERROR("Illegal option: -", current_char); if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') { acpi_gbl_optind++; current_char_ptr = 1; } return ('?'); } /* Option requires an argument? */ if (*++opts_ptr == ':') { if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { acpi_gbl_optarg = &argv[acpi_gbl_optind++][(int) (current_char_ptr + 1)]; } else if (++acpi_gbl_optind >= argc) { ACPI_OPTION_ERROR("Option requires an argument: -", current_char); current_char_ptr = 1; return ('?'); } else { acpi_gbl_optarg = argv[acpi_gbl_optind++]; } current_char_ptr = 1; } /* Option has an optional argument? */ else if (*opts_ptr == '+') { if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { acpi_gbl_optarg = &argv[acpi_gbl_optind++][(int) (current_char_ptr + 1)]; } else if (++acpi_gbl_optind >= argc) { acpi_gbl_optarg = NULL; } else { acpi_gbl_optarg = argv[acpi_gbl_optind++]; } current_char_ptr = 1; } /* Option has optional single-char arguments? */ else if (*opts_ptr == '^') { if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { acpi_gbl_optarg = &argv[acpi_gbl_optind][(int)(current_char_ptr + 1)]; } else { acpi_gbl_optarg = "^"; } acpi_gbl_sub_opt_char = acpi_gbl_optarg[0]; acpi_gbl_optind++; current_char_ptr = 1; } /* Option has a required single-char argument? */ else if (*opts_ptr == '|') { if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { acpi_gbl_optarg = &argv[acpi_gbl_optind][(int)(current_char_ptr + 1)]; } else { ACPI_OPTION_ERROR ("Option requires a single-character suboption: -", current_char); current_char_ptr = 1; return ('?'); } acpi_gbl_sub_opt_char = acpi_gbl_optarg[0]; acpi_gbl_optind++; current_char_ptr = 1; } /* Option with no arguments */ else { if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') { current_char_ptr = 1; acpi_gbl_optind++; } acpi_gbl_optarg = NULL; } return (current_char); } |