wxPython/wxSWIG/SWIG/getopt.cxx

   1 /*******************************************************************************
   2  * Simplified Wrapper and Interface Generator  (SWIG)
   3  *
   4  * Author : David Beazley
   5  *
   6  * Department of Computer Science
   7  * University of Chicago
   8  * 1100 E 58th Street
   9  * Chicago, IL  60637
  10  * beazley@cs.uchicago.edu
  11  *
  12  * Please read the file LICENSE for the copyright and terms by which SWIG
  13  * can be used and distributed.
  14  *******************************************************************************/
  15
  16 #include "internal.h"
  17
  18 /*******************************************************************************
  19  * $Header$
  20  *
  21  * File : getopt.cxx
  22  *
  23  * This file defines a few functions for handling command line arguments.
  24  * C++ makes this really funky---especially since each language module
  25  * may want to extract it's own command line arguments.
  26  *
  27  * My own special version of getopt.   This is a bit weird, because we
  28  * don't know what the options are in advance (they could be determined
  29  * by a language module).
  30  *******************************************************************************/
  31
  32 static char **args;
  33 static int    numargs;
  34 static int   *marked;
  35
  36 // -----------------------------------------------------------------------------
  37 // void init_args(int argc, char **argv)
  38 //
  39 // Initializes the argument list.
  40 //
  41 // Inputs :
  42 //          argc      = Argument count
  43 //          argv      = Argument array
  44 //
  45 // Output : None
  46 //
  47 // Side Effects : Saves local copy of argc and argv
  48 // -----------------------------------------------------------------------------
  49
  50 void
  51 init_args(int argc, char **argv)
  52 {
  53   int i;
  54   numargs = argc;
  55   args = argv;
  56   marked = new int[numargs];
  57   for (i = 0; i < argc; i++) {
  58     marked[i] = 0;
  59   }
  60   marked[0] = 1;
  61 }
  62
  63 // -----------------------------------------------------------------------------
  64 // void mark_arg(int n)
  65 //
  66 // Marks an argument as being parsed.  All modules should do this whenever they
  67 // parse a command line option.
  68 //
  69 // Inputs : n  =  Argument number
  70 //
  71 // Output : None
  72 //
  73 // Side Effects : Sets a status bit internally
  74 // -----------------------------------------------------------------------------
  75
  76 void
  77 mark_arg(int n) {
  78   if (marked)
  79     marked[n] = 1;
  80 }
  81
  82 // -----------------------------------------------------------------------------
  83 // void check_options()
  84 //
  85 // Checks for unparsed command line options.  If so, issues an error and exits.
  86 //
  87 // Inputs : None
  88 //
  89 // Output : None
  90 //
  91 // Side Effects : exits if there are unparsed options
  92 // -----------------------------------------------------------------------------
  93
  94 void check_options() {
  95
  96     int error = 0;
  97     int i;
  98
  99     if (!marked) {
 100       fprintf(stderr,"Must specify an input file.  Use -help for available options.\n");
 101       SWIG_exit(1);
 102     }
 103     for (i = 1; i < numargs-1; i++) {
 104         if (!marked[i]) {
 105             fprintf(stderr,"swig error : Unrecognized option %s\n", args[i]);
 106             error=1;
 107         }
 108     }
 109
 110     if (error) {
 111         fprintf(stderr,"Use 'swig -help' for available options.\n");
 112         SWIG_exit(1);
 113     }
 114
 115     if (marked[numargs-1]) {
 116       fprintf(stderr,"Must specify an input file. Use -help for available options.\n");
 117       SWIG_exit(1);
 118     }
 119 }
 120
 121 // -----------------------------------------------------------------------------
 122 // void arg_error()
 123 //
 124 // Generates a generic error message and exits.
 125 //
 126 // Inputs : None
 127 //
 128 // Output : None
 129 //
 130 // Side Effects : Exits
 131 // -----------------------------------------------------------------------------
 132
 133 void arg_error() {
 134   fprintf(stderr,"SWIG : Unable to parse command line options.\n");
 135   fprintf(stderr,"Use 'swig -help' for available options.\n");
 136   SWIG_exit(1);
 137 }
 138
 139
 140
 141