lib/args.h

   1 /* args.h
   2    Routines to simplify argument handling
   3
   4    Part of the swftools package.
   5
   6    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org>
   7
   8    This file is distributed under the GPL, see file COPYING for details */
   9
  10 #ifndef __args_h__
  11 #define __args_h__
  12
  13 extern int args_callback_option(char*,char*);
  14 extern int args_callback_longoption(char*,char*);
  15 extern int args_callback_command(char*,char*);
  16 extern void args_callback_usage(char*name);
  17
  18 int argn;
  19 char**argv;
  20
  21 void processargs(int argn2,char**argv2)
  22 {
  23     int t;
  24     if(argn2==1)
  25     {
  26         args_callback_usage(argv2[0]);
  27         exit(1);
  28     }
  29     for(t=1;t<argn2;t++)
  30     {
  31         char*next;
  32         if(t<argn2-1) next=argv2[t+1];
  33         else        next=0;
  34
  35         if(argv2[t][0]=='-')
  36         {
  37             if(argv2[t][1]=='-')
  38             {
  39                 if(!strcmp(&argv2[t][2],"help"))
  40                 {
  41                     args_callback_usage(argv2[0]);
  42                     exit(1);
  43                 }
  44                 t+=args_callback_longoption(&argv2[t][2],next);
  45             }
  46             else
  47             {
  48                 if(strchr("?h",argv2[t][1]))
  49                 {
  50                     args_callback_usage(argv2[0]);
  51                     exit(1);
  52                 }
  53                 t+=args_callback_option(&argv2[t][1],next);
  54             }
  55         }
  56         else
  57         {
  58             t+=args_callback_command(argv2[t],next);
  59         }
  60     }
  61 }
  62
  63 struct options_t
  64 {
  65     char*shortoption;
  66     char*longoption;
  67 };
  68
  69 int args_long2shortoption(struct options_t*options, char*name, char*val)
  70 {
  71     char*equal = strchr(name,'=');
  72     if (equal) {
  73         *equal = 0;
  74         equal++;
  75     }
  76     while(options->shortoption) {
  77         if(!strcmp(options->longoption, name)) {
  78                 char*tmp = (char*)malloc(strlen(options->shortoption)
  79                         +(equal?strlen(equal)+2:2));
  80                 strcpy(tmp, options->shortoption);
  81                 if(equal) {
  82                     //strcpy(&tmp[strlen(tmp)], equal);
  83                     int ret = args_callback_option(tmp, equal);
  84                     if(!ret) {
  85                         fprintf(stderr, "Warning: Option --%s takes no parameter.\n", name);
  86                     }
  87                     return 0;
  88                 }
  89                 return args_callback_option(tmp,val);
  90         }
  91         options++;
  92     }
  93     fprintf(stderr, "Unknown option: --%s\n", name);
  94     exit(1);
  95 }
  96
  97 #endif //__args_h__