xref: /freebsd/sys/contrib/dev/acpica/common/getopt.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 
2 /******************************************************************************
3  *
4  * Module Name: getopt
5  *              $Revision: 1.10 $
6  *
7  *****************************************************************************/
8 
9 /******************************************************************************
10  *
11  * 1. Copyright Notice
12  *
13  * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp.
14  * All rights reserved.
15  *
16  * 2. License
17  *
18  * 2.1. This is your license from Intel Corp. under its intellectual property
19  * rights.  You may have additional license terms from the party that provided
20  * you this software, covering your right to use that party's intellectual
21  * property rights.
22  *
23  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24  * copy of the source code appearing in this file ("Covered Code") an
25  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26  * base code distributed originally by Intel ("Original Intel Code") to copy,
27  * make derivatives, distribute, use and display any portion of the Covered
28  * Code in any form, with the right to sublicense such rights; and
29  *
30  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31  * license (with the right to sublicense), under only those claims of Intel
32  * patents that are infringed by the Original Intel Code, to make, use, sell,
33  * offer to sell, and import the Covered Code and derivative works thereof
34  * solely to the minimum extent necessary to exercise the above copyright
35  * license, and in no event shall the patent license extend to any additions
36  * to or modifications of the Original Intel Code.  No other license or right
37  * is granted directly or by implication, estoppel or otherwise;
38  *
39  * The above copyright and patent license is granted only if the following
40  * conditions are met:
41  *
42  * 3. Conditions
43  *
44  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45  * Redistribution of source code of any substantial portion of the Covered
46  * Code or modification with rights to further distribute source must include
47  * the above Copyright Notice, the above License, this list of Conditions,
48  * and the following Disclaimer and Export Compliance provision.  In addition,
49  * Licensee must cause all Covered Code to which Licensee contributes to
50  * contain a file documenting the changes Licensee made to create that Covered
51  * Code and the date of any change.  Licensee must include in that file the
52  * documentation of any changes made by any predecessor Licensee.  Licensee
53  * must include a prominent statement that the modification is derived,
54  * directly or indirectly, from Original Intel Code.
55  *
56  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57  * Redistribution of source code of any substantial portion of the Covered
58  * Code or modification without rights to further distribute source must
59  * include the following Disclaimer and Export Compliance provision in the
60  * documentation and/or other materials provided with distribution.  In
61  * addition, Licensee may not authorize further sublicense of source of any
62  * portion of the Covered Code, and must include terms to the effect that the
63  * license from Licensee to its licensee is limited to the intellectual
64  * property embodied in the software Licensee provides to its licensee, and
65  * not to intellectual property embodied in modifications its licensee may
66  * make.
67  *
68  * 3.3. Redistribution of Executable. Redistribution in executable form of any
69  * substantial portion of the Covered Code or modification must reproduce the
70  * above Copyright Notice, and the following Disclaimer and Export Compliance
71  * provision in the documentation and/or other materials provided with the
72  * distribution.
73  *
74  * 3.4. Intel retains all right, title, and interest in and to the Original
75  * Intel Code.
76  *
77  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78  * Intel shall be used in advertising or otherwise to promote the sale, use or
79  * other dealings in products derived from or relating to the Covered Code
80  * without prior written authorization from Intel.
81  *
82  * 4. Disclaimer and Export Compliance
83  *
84  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
87  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
88  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
89  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90  * PARTICULAR PURPOSE.
91  *
92  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
98  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99  * LIMITED REMEDY.
100  *
101  * 4.3. Licensee shall not export, either directly or indirectly, any of this
102  * software or system incorporating such software without first obtaining any
103  * required license or other approval from the U. S. Department of Commerce or
104  * any other agency or department of the United States Government.  In the
105  * event Licensee exports any such software from the United States or
106  * re-exports any such software from a foreign destination, Licensee shall
107  * ensure that the distribution and export/re-export of the software is in
108  * compliance with all laws, regulations, orders, or other restrictions of the
109  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110  * any of its subsidiaries will export/re-export any technical data, process,
111  * software, or service, directly or indirectly, to any country for which the
112  * United States government or any agency thereof requires an export license,
113  * other governmental approval, or letter of assurance, without first obtaining
114  * such license, approval or letter.
115  *
116  *****************************************************************************/
117 
118 
119 #include <stdio.h>
120 #include <string.h>
121 
122 #define ERR(szz,czz) if(AcpiGbl_Opterr){fprintf(stderr,"%s%s%c\n",argv[0],szz,czz);}
123 
124 
125 int   AcpiGbl_Opterr = 1;
126 int   AcpiGbl_Optind = 1;
127 int   AcpiGbl_Optopt;
128 char  *AcpiGbl_Optarg;
129 
130 
131 /*******************************************************************************
132  *
133  * FUNCTION:    AcpiGetopt
134  *
135  * PARAMETERS:  argc, argv          - from main
136  *              opts                - options info list
137  *
138  * RETURN:      Option character or EOF
139  *
140  * DESCRIPTION: Get the next option
141  *
142  ******************************************************************************/
143 
144 int
145 AcpiGetopt(
146     int                     argc,
147     char                    **argv,
148     char                    *opts)
149 {
150     static int              CurrentCharPtr = 1;
151     int                     CurrentChar;
152     char                    *OptsPtr;
153 
154 
155     if (CurrentCharPtr == 1)
156     {
157         if (AcpiGbl_Optind >= argc ||
158             argv[AcpiGbl_Optind][0] != '-' ||
159             argv[AcpiGbl_Optind][1] == '\0')
160         {
161             return(EOF);
162         }
163         else if (strcmp (argv[AcpiGbl_Optind], "--") == 0)
164         {
165             AcpiGbl_Optind++;
166             return(EOF);
167         }
168     }
169 
170     /* Get the option */
171 
172     CurrentChar =
173     AcpiGbl_Optopt =
174     argv[AcpiGbl_Optind][CurrentCharPtr];
175 
176     /* Make sure that the option is legal */
177 
178     if (CurrentChar == ':' ||
179        (OptsPtr = strchr (opts, CurrentChar)) == NULL)
180     {
181         ERR (": illegal option -- ", CurrentChar);
182 
183         if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
184         {
185             AcpiGbl_Optind++;
186             CurrentCharPtr = 1;
187         }
188 
189         return ('?');
190     }
191 
192     /* Option requires an argument? */
193 
194     if (*++OptsPtr == ':')
195     {
196         if (argv[AcpiGbl_Optind][CurrentCharPtr+1] != '\0')
197         {
198             AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][CurrentCharPtr+1];
199         }
200         else if (++AcpiGbl_Optind >= argc)
201         {
202             ERR (": option requires an argument -- ", CurrentChar);
203 
204             CurrentCharPtr = 1;
205             return ('?');
206         }
207         else
208         {
209             AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
210         }
211 
212         CurrentCharPtr = 1;
213     }
214 
215     /* Option has optional single-char arguments? */
216 
217     else if (*OptsPtr == '^')
218     {
219         if (argv[AcpiGbl_Optind][CurrentCharPtr+1] != '\0')
220         {
221             AcpiGbl_Optarg = &argv[AcpiGbl_Optind][CurrentCharPtr+1];
222         }
223         else
224         {
225             AcpiGbl_Optarg = "^";
226         }
227 
228         AcpiGbl_Optind++;
229         CurrentCharPtr = 1;
230     }
231 
232     /* Option with no arguments */
233 
234     else
235     {
236         if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
237         {
238             CurrentCharPtr = 1;
239             AcpiGbl_Optind++;
240         }
241 
242         AcpiGbl_Optarg = NULL;
243     }
244 
245     return (CurrentChar);
246 }
247