// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: getopt * * Copyright (C) 2000 - 2021, 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 #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); }