usr/src/cmd/acpi/common/getopt.c

   1 /******************************************************************************
   2  *
   3  * Module Name: getopt
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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 an optional argument
  51  *    "f^"      - Option has optional single-char sub-options
  52  *    "f|"      - Option has required single-char sub-options
  53  */
  54
  55 #include "acpi.h"
  56 #include "accommon.h"
  57 #include "acapps.h"
  58
  59 #define ACPI_OPTION_ERROR(msg, badchar) \
  60     if (AcpiGbl_Opterr) {AcpiLogError ("%s%c\n", msg, badchar);}
  61
  62
  63 int                 AcpiGbl_Opterr = 1;
  64 int                 AcpiGbl_Optind = 1;
  65 int                 AcpiGbl_SubOptChar = 0;
  66 char                *AcpiGbl_Optarg;
  67
  68 static int          CurrentCharPtr = 1;
  69
  70
  71 /*******************************************************************************
  72  *
  73  * FUNCTION:    AcpiGetoptArgument
  74  *
  75  * PARAMETERS:  argc, argv          - from main
  76  *
  77  * RETURN:      0 if an argument was found, -1 otherwise. Sets AcpiGbl_Optarg
  78  *              to point to the next argument.
  79  *
  80  * DESCRIPTION: Get the next argument. Used to obtain arguments for the
  81  *              two-character options after the original call to AcpiGetopt.
  82  *              Note: Either the argument starts at the next character after
  83  *              the option, or it is pointed to by the next argv entry.
  84  *              (After call to AcpiGetopt, we need to backup to the previous
  85  *              argv entry).
  86  *
  87  ******************************************************************************/
  88
  89 int
  90 AcpiGetoptArgument (
  91     int                     argc,
  92     char                    **argv)
  93 {
  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 ACPI_OPT_END
 127  *
 128  * DESCRIPTION: Get the next option
 129  *
 130  ******************************************************************************/
 131
 132 int
 133 AcpiGetopt(
 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 (ACPI_OPT_END);
 149         }
 150         else if (strcmp (argv[AcpiGbl_Optind], "--") == 0)
 151         {
 152             AcpiGbl_Optind++;
 153             return (ACPI_OPT_END);
 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 (
 188                 "Option requires an argument: -", CurrentChar);
 189
 190             CurrentCharPtr = 1;
 191             return ('?');
 192         }
 193         else
 194         {
 195             AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
 196         }
 197
 198         CurrentCharPtr = 1;
 199     }
 200
 201     /* Option has an optional argument? */
 202
 203     else if (*OptsPtr == '+')
 204     {
 205         if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
 206         {
 207             AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];
 208         }
 209         else if (++AcpiGbl_Optind >= argc)
 210         {
 211             AcpiGbl_Optarg = NULL;
 212         }
 213         else
 214         {
 215             AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
 216         }
 217
 218         CurrentCharPtr = 1;
 219     }
 220
 221     /* Option has optional single-char arguments? */
 222
 223     else if (*OptsPtr == '^')
 224     {
 225         if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
 226         {
 227             AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];
 228         }
 229         else
 230         {
 231             AcpiGbl_Optarg = "^";
 232         }
 233
 234         AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];
 235         AcpiGbl_Optind++;
 236         CurrentCharPtr = 1;
 237     }
 238
 239     /* Option has a required single-char argument? */
 240
 241     else if (*OptsPtr == '|')
 242     {
 243         if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
 244         {
 245             AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];
 246         }
 247         else
 248         {
 249             ACPI_OPTION_ERROR (
 250                 "Option requires a single-character suboption: -",
 251                 CurrentChar);
 252
 253             CurrentCharPtr = 1;
 254             return ('?');
 255         }
 256
 257         AcpiGbl_SubOptChar = AcpiGbl_Optarg[0];
 258         AcpiGbl_Optind++;
 259         CurrentCharPtr = 1;
 260     }
 261
 262     /* Option with no arguments */
 263
 264     else
 265     {
 266         if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
 267         {
 268             CurrentCharPtr = 1;
 269             AcpiGbl_Optind++;
 270         }
 271
 272         AcpiGbl_Optarg = NULL;
 273     }
 274
 275     return (CurrentChar);
 276 }