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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: getopt
*
* Copyright (C) 2000 - 2022, 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);
}
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