[deliverable/linux.git] / tools / power / acpi / common / getopt.c

/******************************************************************************
 *
 * 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);
}
Commit	Line	Data
506f57dd LZ	1	/******************************************************************************
	2	*
	3	* Module Name: getopt
	4	*
	5	*****************************************************************************/
	6
	7	/*
82a80941	8	* Copyright (C) 2000 - 2015, Intel Corp.
506f57dd LZ	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
	44	/*
	45	* ACPICA getopt() implementation
	46	*
	47	* Option strings:
	48	* "f" - Option has no arguments
	49	* "f:" - Option requires an argument
	50	* "f^" - Option has optional single-char sub-options
	51	* "f\|" - Option has required single-char sub-options
	52	*/
	53
506f57dd LZ	54	#include <acpi/acpi.h>
	55	#include "accommon.h"
	56	#include "acapps.h"
	57
	58	#define ACPI_OPTION_ERROR(msg, badchar) \
a92e9577	59	if (acpi_gbl_opterr) {acpi_log_error ("%s%c\n", msg, badchar);}
506f57dd LZ	60
	61	int acpi_gbl_opterr = 1;
	62	int acpi_gbl_optind = 1;
	63	int acpi_gbl_sub_opt_char = 0;
	64	char *acpi_gbl_optarg;
	65
	66	static int current_char_ptr = 1;
	67
	68	/*******************************************************************************
	69	*
	70	* FUNCTION: acpi_getopt_argument
	71	*
	72	* PARAMETERS: argc, argv - from main
	73	*
	74	* RETURN: 0 if an argument was found, -1 otherwise. Sets acpi_gbl_Optarg
	75	* to point to the next argument.
	76	*
	77	* DESCRIPTION: Get the next argument. Used to obtain arguments for the
	78	* two-character options after the original call to acpi_getopt.
	79	* Note: Either the argument starts at the next character after
	80	* the option, or it is pointed to by the next argv entry.
	81	* (After call to acpi_getopt, we need to backup to the previous
	82	* argv entry).
	83	*
	84	******************************************************************************/
	85
	86	int acpi_getopt_argument(int argc, char **argv)
	87	{
	88	acpi_gbl_optind--;
	89	current_char_ptr++;
	90
	91	if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') {
	92	acpi_gbl_optarg =
	93	&argv[acpi_gbl_optind++][(int)(current_char_ptr + 1)];
	94	} else if (++acpi_gbl_optind >= argc) {
	95	ACPI_OPTION_ERROR("Option requires an argument: -", 'v');
	96
	97	current_char_ptr = 1;
	98	return (-1);
	99	} else {
	100	acpi_gbl_optarg = argv[acpi_gbl_optind++];
	101	}
	102
	103	current_char_ptr = 1;
	104	return (0);
	105	}
	106
	107	/*******************************************************************************
	108	*
	109	* FUNCTION: acpi_getopt
	110	*
	111	* PARAMETERS: argc, argv - from main
	112	* opts - options info list
	113	*
a92e9577	114	* RETURN: Option character or ACPI_OPT_END
506f57dd LZ	115	*
	116	* DESCRIPTION: Get the next option
	117	*
	118	******************************************************************************/
	119
	120	int acpi_getopt(int argc, char *argv, char opts)
	121	{
	122	int current_char;
	123	char *opts_ptr;
	124
	125	if (current_char_ptr == 1) {
	126	if (acpi_gbl_optind >= argc \|\|
	127	argv[acpi_gbl_optind][0] != '-' \|\|
	128	argv[acpi_gbl_optind][1] == '\0') {
a92e9577 LZ	129	return (ACPI_OPT_END);
a92e9577 LZ	130	} else if (ACPI_STRCMP(argv[acpi_gbl_optind], "--") == 0) {
506f57dd	131	acpi_gbl_optind++;
a92e9577	132	return (ACPI_OPT_END);
506f57dd LZ	133	}
	134	}
	135
	136	/* Get the option */
	137
	138	current_char = argv[acpi_gbl_optind][current_char_ptr];
	139
	140	/* Make sure that the option is legal */
	141
	142	if (current_char == ':' \|\|
a92e9577	143	(opts_ptr = ACPI_STRCHR(opts, current_char)) == NULL) {
506f57dd LZ	144	ACPI_OPTION_ERROR("Illegal option: -", current_char);
	145
	146	if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') {
	147	acpi_gbl_optind++;
	148	current_char_ptr = 1;
	149	}
	150
	151	return ('?');
	152	}
	153
	154	/* Option requires an argument? */
	155
	156	if (*++opts_ptr == ':') {
	157	if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') {
	158	acpi_gbl_optarg =
	159	&argv[acpi_gbl_optind++][(int)
	160	(current_char_ptr + 1)];
	161	} else if (++acpi_gbl_optind >= argc) {
	162	ACPI_OPTION_ERROR("Option requires an argument: -",
	163	current_char);
	164
	165	current_char_ptr = 1;
	166	return ('?');
	167	} else {
	168	acpi_gbl_optarg = argv[acpi_gbl_optind++];
	169	}
	170
	171	current_char_ptr = 1;
	172	}
	173
	174	/* Option has an optional argument? */
	175
	176	else if (*opts_ptr == '+') {
	177	if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') {
	178	acpi_gbl_optarg =
	179	&argv[acpi_gbl_optind++][(int)
	180	(current_char_ptr + 1)];
	181	} else if (++acpi_gbl_optind >= argc) {
	182	acpi_gbl_optarg = NULL;
	183	} else {
	184	acpi_gbl_optarg = argv[acpi_gbl_optind++];
	185	}
	186
	187	current_char_ptr = 1;
	188	}
	189
	190	/* Option has optional single-char arguments? */
	191
	192	else if (*opts_ptr == '^') {
	193	if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') {
	194	acpi_gbl_optarg =
	195	&argv[acpi_gbl_optind][(int)(current_char_ptr + 1)];
	196	} else {
	197	acpi_gbl_optarg = "^";
	198	}
	199
	200	acpi_gbl_sub_opt_char = acpi_gbl_optarg[0];
	201	acpi_gbl_optind++;
	202	current_char_ptr = 1;
	203	}
	204
	205	/* Option has a required single-char argument? */
	206
	207	else if (*opts_ptr == '\|') {
208	if (argv[acpi_gbl_optind][(int)(current_char_ptr + 1)] != '\0') {
209	acpi_gbl_optarg =
210	&argv[acpi_gbl_optind][(int)(current_char_ptr + 1)];
211	} else {
212	ACPI_OPTION_ERROR
213	("Option requires a single-character suboption: -",
214	current_char);
215
216	current_char_ptr = 1;
217	return ('?');
218	}
219
220	acpi_gbl_sub_opt_char = acpi_gbl_optarg[0];
221	acpi_gbl_optind++;
222	current_char_ptr = 1;
223	}
224
225	/* Option with no arguments */
226
227	else {
228	if (argv[acpi_gbl_optind][++current_char_ptr] == '\0') {
229	current_char_ptr = 1;
230	acpi_gbl_optind++;
231	}
232
233	acpi_gbl_optarg = NULL;
234	}
235
236	return (current_char);
237	}