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205 lines
5.2 KiB
205 lines
5.2 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: getopt |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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/* |
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* ACPICA getopt() implementation |
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* |
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* Option strings: |
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* "f" - Option has no arguments |
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* "f:" - Option requires an argument |
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* "f+" - Option has an optional argument |
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* "f^" - Option has optional single-char sub-options |
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* "f|" - Option has required single-char sub-options |
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*/ |
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acapps.h" |
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#define ACPI_OPTION_ERROR(msg, badchar) \ |
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if (acpi_gbl_opterr) {fprintf (stderr, "%s%c\n", msg, badchar);} |
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int acpi_gbl_opterr = 1; |
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int acpi_gbl_optind = 1; |
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int acpi_gbl_sub_opt_char = 0; |
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char *acpi_gbl_optarg; |
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static int current_char_ptr = 1; |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_getopt_argument |
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* |
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* PARAMETERS: argc, argv - from main |
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* |
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* RETURN: 0 if an argument was found, -1 otherwise. Sets acpi_gbl_Optarg |
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* to point to the next argument. |
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* |
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* DESCRIPTION: Get the next argument. Used to obtain arguments for the |
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* two-character options after the original call to acpi_getopt. |
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* Note: Either the argument starts at the next character after |
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* the option, or it is pointed to by the next argv entry. |
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* (After call to acpi_getopt, we need to backup to the previous |
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* argv entry). |
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* |
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******************************************************************************/ |
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int acpi_getopt_argument(int argc, char **argv) |
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{ |
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acpi_gbl_optind--; |
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current_char_ptr++; |
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if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { |
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acpi_gbl_optarg = |
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&argv[acpi_gbl_optind++][(int)(current_char_ptr + 1)]; |
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} else if (++acpi_gbl_optind >= argc) { |
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ACPI_OPTION_ERROR("\nOption requires an argument", 0); |
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current_char_ptr = 1; |
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return (-1); |
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} else { |
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acpi_gbl_optarg = argv[acpi_gbl_optind++]; |
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} |
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current_char_ptr = 1; |
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return (0); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_getopt |
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* |
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* PARAMETERS: argc, argv - from main |
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* opts - options info list |
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* |
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* RETURN: Option character or ACPI_OPT_END |
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* |
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* DESCRIPTION: Get the next option |
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* |
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******************************************************************************/ |
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int acpi_getopt(int argc, char **argv, char *opts) |
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{ |
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int current_char; |
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char *opts_ptr; |
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if (current_char_ptr == 1) { |
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if (acpi_gbl_optind >= argc || |
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argv[acpi_gbl_optind][0] != '-' || |
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argv[acpi_gbl_optind][1] == '\0') { |
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return (ACPI_OPT_END); |
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} else if (strcmp(argv[acpi_gbl_optind], "--") == 0) { |
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acpi_gbl_optind++; |
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return (ACPI_OPT_END); |
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} |
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} |
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/* Get the option */ |
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current_char = argv[acpi_gbl_optind][current_char_ptr]; |
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/* Make sure that the option is legal */ |
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if (current_char == ':' || |
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(opts_ptr = strchr(opts, current_char)) == NULL) { |
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ACPI_OPTION_ERROR("Illegal option: -", current_char); |
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if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') { |
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acpi_gbl_optind++; |
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current_char_ptr = 1; |
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} |
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return ('?'); |
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} |
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/* Option requires an argument? */ |
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if (*++opts_ptr == ':') { |
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if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { |
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acpi_gbl_optarg = |
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&argv[acpi_gbl_optind++][(int) |
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(current_char_ptr + 1)]; |
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} else if (++acpi_gbl_optind >= argc) { |
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ACPI_OPTION_ERROR("Option requires an argument: -", |
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current_char); |
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current_char_ptr = 1; |
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return ('?'); |
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} else { |
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acpi_gbl_optarg = argv[acpi_gbl_optind++]; |
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} |
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current_char_ptr = 1; |
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} |
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/* Option has an optional argument? */ |
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else if (*opts_ptr == '+') { |
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if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { |
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acpi_gbl_optarg = |
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&argv[acpi_gbl_optind++][(int) |
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(current_char_ptr + 1)]; |
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} else if (++acpi_gbl_optind >= argc) { |
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acpi_gbl_optarg = NULL; |
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} else { |
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acpi_gbl_optarg = argv[acpi_gbl_optind++]; |
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} |
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current_char_ptr = 1; |
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} |
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/* Option has optional single-char arguments? */ |
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else if (*opts_ptr == '^') { |
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if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { |
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acpi_gbl_optarg = |
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&argv[acpi_gbl_optind][(int)(current_char_ptr + 1)]; |
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} else { |
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acpi_gbl_optarg = "^"; |
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} |
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acpi_gbl_sub_opt_char = acpi_gbl_optarg[0]; |
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acpi_gbl_optind++; |
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current_char_ptr = 1; |
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} |
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/* Option has a required single-char argument? */ |
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else if (*opts_ptr == '|') { |
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if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') { |
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acpi_gbl_optarg = |
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&argv[acpi_gbl_optind][(int)(current_char_ptr + 1)]; |
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} else { |
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ACPI_OPTION_ERROR |
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("Option requires a single-character suboption: -", |
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current_char); |
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current_char_ptr = 1; |
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return ('?'); |
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} |
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acpi_gbl_sub_opt_char = acpi_gbl_optarg[0]; |
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acpi_gbl_optind++; |
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current_char_ptr = 1; |
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} |
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/* Option with no arguments */ |
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else { |
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if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') { |
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current_char_ptr = 1; |
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acpi_gbl_optind++; |
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} |
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acpi_gbl_optarg = NULL; |
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} |
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return (current_char); |
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}
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