mirror of https://gitee.com/openkylin/linux.git
238 lines
6.9 KiB
C
238 lines
6.9 KiB
C
/******************************************************************************
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*
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* Module Name: getopt
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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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 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) {acpi_log_error ("%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("Option requires an argument: -", 'v');
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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 (ACPI_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 = ACPI_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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