Home | History | Annotate | Line # | Download | only in common
getopt.c revision 1.1.1.2.2.2 
      1 
      2 /******************************************************************************
      3  *
      4  * Module Name: getopt
      5  *
      6  *****************************************************************************/
      7 
      8 /*
      9  * Copyright (C) 2000 - 2011, Intel Corp.
     10  * All rights reserved.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions, and the following disclaimer,
     17  *    without modification.
     18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     19  *    substantially similar to the "NO WARRANTY" disclaimer below
     20  *    ("Disclaimer") and any redistribution must be conditioned upon
     21  *    including a substantially similar Disclaimer requirement for further
     22  *    binary redistribution.
     23  * 3. Neither the names of the above-listed copyright holders nor the names
     24  *    of any contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * Alternatively, this software may be distributed under the terms of the
     28  * GNU General Public License ("GPL") version 2 as published by the Free
     29  * Software Foundation.
     30  *
     31  * NO WARRANTY
     32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     42  * POSSIBILITY OF SUCH DAMAGES.
     43  */
     44 
     45 
     46 #include <stdio.h>
     47 #include <string.h>
     48 #include "acpi.h"
     49 #include "accommon.h"
     50 #include "acapps.h"
     51 
     52 #define ERR(szz,czz) if(AcpiGbl_Opterr){fprintf(stderr,"%s%s%c\n",argv[0],szz,czz);}
     53 
     54 
     55 int   AcpiGbl_Opterr = 1;
     56 int   AcpiGbl_Optind = 1;
     57 char  *AcpiGbl_Optarg;
     58 
     59 
     60 /*******************************************************************************
     61  *
     62  * FUNCTION:    AcpiGetopt
     63  *
     64  * PARAMETERS:  argc, argv          - from main
     65  *              opts                - options info list
     66  *
     67  * RETURN:      Option character or EOF
     68  *
     69  * DESCRIPTION: Get the next option
     70  *
     71  ******************************************************************************/
     72 
     73 int
     74 AcpiGetopt(
     75     int                     argc,
     76     char                    **argv,
     77     char                    *opts)
     78 {
     79     static int              CurrentCharPtr = 1;
     80     int                     CurrentChar;
     81     char                    *OptsPtr;
     82 
     83 
     84     if (CurrentCharPtr == 1)
     85     {
     86         if (AcpiGbl_Optind >= argc ||
     87             argv[AcpiGbl_Optind][0] != '-' ||
     88             argv[AcpiGbl_Optind][1] == '\0')
     89         {
     90             return(EOF);
     91         }
     92         else if (strcmp (argv[AcpiGbl_Optind], "--") == 0)
     93         {
     94             AcpiGbl_Optind++;
     95             return(EOF);
     96         }
     97     }
     98 
     99     /* Get the option */
    100 
    101     CurrentChar = argv[AcpiGbl_Optind][CurrentCharPtr];
    102 
    103     /* Make sure that the option is legal */
    104 
    105     if (CurrentChar == ':' ||
    106        (OptsPtr = strchr (opts, CurrentChar)) == NULL)
    107     {
    108         ERR (": illegal option -- ", CurrentChar);
    109 
    110         if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
    111         {
    112             AcpiGbl_Optind++;
    113             CurrentCharPtr = 1;
    114         }
    115 
    116         return ('?');
    117     }
    118 
    119     /* Option requires an argument? */
    120 
    121     if (*++OptsPtr == ':')
    122     {
    123         if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
    124         {
    125             AcpiGbl_Optarg = &argv[AcpiGbl_Optind++][(int) (CurrentCharPtr+1)];
    126         }
    127         else if (++AcpiGbl_Optind >= argc)
    128         {
    129             ERR (": option requires an argument -- ", CurrentChar);
    130 
    131             CurrentCharPtr = 1;
    132             return ('?');
    133         }
    134         else
    135         {
    136             AcpiGbl_Optarg = argv[AcpiGbl_Optind++];
    137         }
    138 
    139         CurrentCharPtr = 1;
    140     }
    141 
    142     /* Option has optional single-char arguments? */
    143 
    144     else if (*OptsPtr == '^')
    145     {
    146         if (argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)] != '\0')
    147         {
    148             AcpiGbl_Optarg = &argv[AcpiGbl_Optind][(int) (CurrentCharPtr+1)];
    149         }
    150         else
    151         {
    152             AcpiGbl_Optarg = "^";
    153         }
    154 
    155         AcpiGbl_Optind++;
    156         CurrentCharPtr = 1;
    157     }
    158 
    159     /* Option with no arguments */
    160 
    161     else
    162     {
    163         if (argv[AcpiGbl_Optind][++CurrentCharPtr] == '\0')
    164         {
    165             CurrentCharPtr = 1;
    166             AcpiGbl_Optind++;
    167         }
    168 
    169         AcpiGbl_Optarg = NULL;
    170     }
    171 
    172     return (CurrentChar);
    173 }
    174