getopt.c revision 253690 
1/******************************************************************************
2 *
3 * Module Name: getopt
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2013, Intel Corp.
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
54#include <stdio.h>
55#include <string.h>
56#include <contrib/dev/acpica/include/acpi.h>
57#include <contrib/dev/acpica/include/accommon.h>
58#include <contrib/dev/acpica/include/acapps.h>
59
60#define ACPI_OPTION_ERROR(msg, badchar) \
61    if (AcpiGbl_Opterr) {fprintf (stderr, "%s%c\n", msg, badchar);}
62
63
64int                 AcpiGbl_Opterr = 1;
65int                 AcpiGbl_Optind = 1;
66int                 AcpiGbl_SubOptChar = 0;
67char                *AcpiGbl_Optarg;
68
69static int          CurrentCharPtr = 1;
70
71
72/*******************************************************************************
73 *
74 * FUNCTION:    AcpiGetoptArgument
75 *
76 * PARAMETERS:  argc, argv          - from main
77 *
78 * RETURN:      0 if an argument was found, -1 otherwise. Sets AcpiGbl_Optarg
79 *              to point to the next argument.
80 *
81 * DESCRIPTION: Get the next argument. Used to obtain arguments for the
82 *              two-character options after the original call to AcpiGetopt.
83 *              Note: Either the argument starts at the next character after
84 *              the option, or it is pointed to by the next argv entry.
85 *              (After call to AcpiGetopt, we need to backup to the previous
86 *              argv entry).
87 *
88 ******************************************************************************/
89
90int
91AcpiGetoptArgument (
92    int                     argc,
93    char                    **argv)
94{
95    AcpiGbl_Optind--;
96    CurrentCharPtr++;
97
98    if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
99    {
100        AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];
101    }
102    else if (++AcpiGbl_Optind >= argc)
103    {
104        ACPI_OPTION_ERROR ("Option requires an argument: -", 'v');
105
106        CurrentCharPtr = 1;
107        return (-1);
108    }
109    else
110    {
111        AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
112    }
113
114    CurrentCharPtr = 1;
115    return (0);
116}
117
118
119/*******************************************************************************
120 *
121 * FUNCTION:    AcpiGetopt
122 *
123 * PARAMETERS:  argc, argv          - from main
124 *              opts                - options info list
125 *
126 * RETURN:      Option character or EOF
127 *
128 * DESCRIPTION: Get the next option
129 *
130 ******************************************************************************/
131
132int
133AcpiGetopt(
134    int                     argc,
135    char                    **argv,
136    char                    *opts)
137{
138    int                     CurrentChar;
139    char                    *OptsPtr;
140
141
142    if (CurrentCharPtr == 1)
143    {
144        if (AcpiGbl_Optind >= argc ||
145            argv[AcpiGbl_Optind][0] != '-' ||
146            argv[AcpiGbl_Optind][1] == '\0')
147        {
148            return (EOF);
149        }
150        else if (strcmp (argv[AcpiGbl_Optind], "--") == 0)
151        {
152            AcpiGbl_Optind++;
153            return (EOF);
154        }
155    }
156
157    /* Get the option */
158
159    CurrentChar = argv[AcpiGbl_Optind][CurrentCharPtr];
160
161    /* Make sure that the option is legal */
162
163    if (CurrentChar == ':' ||
164       (OptsPtr = strchr (opts, CurrentChar)) == NULL)
165    {
166        ACPI_OPTION_ERROR ("Illegal option: -", CurrentChar);
167
168        if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
169        {
170            AcpiGbl_Optind++;
171            CurrentCharPtr = 1;
172        }
173
174        return ('?');
175    }
176
177    /* Option requires an argument? */
178
179    if (*++OptsPtr == ':')
180    {
181        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
182        {
183            AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];
184        }
185        else if (++AcpiGbl_Optind >= argc)
186        {
187            ACPI_OPTION_ERROR ("Option requires an argument: -", CurrentChar);
188
189            CurrentCharPtr = 1;
190            return ('?');
191        }
192        else
193        {
194            AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
195        }
196
197        CurrentCharPtr = 1;
198    }
199
200    /* Option has an optional argument? */
201
202    else if (*OptsPtr == '+')
203    {
204        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
205        {
206            AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];
207        }
208        else if (++AcpiGbl_Optind >= argc)
209        {
210            AcpiGbl_Optarg = NULL;
211        }
212        else
213        {
214            AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
215        }
216
217        CurrentCharPtr = 1;
218    }
219
220    /* Option has optional single-char arguments? */
221
222    else if (*OptsPtr == '^')
223    {
224        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
225        {
226            AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];
227        }
228        else
229        {
230            AcpiGbl_Optarg = "^";
231        }
232
233        AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];
234        AcpiGbl_Optind++;
235        CurrentCharPtr = 1;
236    }
237
238    /* Option has a required single-char argument? */
239
240    else if (*OptsPtr == '|')
241    {
242        if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
243        {
244            AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];
245        }
246        else
247        {
248            ACPI_OPTION_ERROR ("Option requires a single-character suboption: -", CurrentChar);
249
250            CurrentCharPtr = 1;
251            return ('?');
252        }
253
254        AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];
255        AcpiGbl_Optind++;
256        CurrentCharPtr = 1;
257    }
258
259    /* Option with no arguments */
260
261    else
262    {
263        if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
264        {
265            CurrentCharPtr = 1;
266            AcpiGbl_Optind++;
267        }
268
269        AcpiGbl_Optarg = NULL;
270    }
271
272    return (CurrentChar);
273}
274