aboutsummaryrefslogtreecommitdiffstats
path: root/tools/power/acpi/common/getopt.c
blob: 5da129e10aa2dcd049647d10d025c26e08b7cf65 (plain)
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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/******************************************************************************
 *
 * Module Name: getopt
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2015, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

/*
 * ACPICA getopt() implementation
 *
 * Option strings:
 *    "f"       - Option has no arguments
 *    "f:"      - Option requires an 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) {acpi_log_error ("%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("Option requires an argument: -", 'v');

		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 (ACPI_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 = ACPI_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);
}

Privacy Policy