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                 if(argv2[t][1]) // this might be something like e.g. -xvf
  54                 {
  55                     char buf[2];
  56                     buf[1]=0;
  57                     int s=1;
  58                     int ret;
  59                     do{
  60                         if(argv2[t][s+1]) {
  61                           buf[0] = argv2[t][s];
  62                           ret = args_callback_option(buf,&argv2[t][s+1]);
  63                         }
  64                         else {
  65                           t+= args_callback_option(&argv2[t][s], next);
  66                           break;
  67                         }
  68                         s++;
  69                     } while(!ret);
  70                 }
  71                 else // - usually means "read stdout"
  72                 {
  73                     t+=args_callback_option(&argv2[t][1],next);
  74                 }
  75             }
  76         }
  77         else
  78         {
  79             t+=args_callback_command(argv2[t],next);
  80         }
  81     }
  82 }
  83
  84 struct options_t
  85 {
  86     char*shortoption;
  87     char*longoption;
  88 };
  89
  90 int args_long2shortoption(struct options_t*options, char*name, char*val)
  91 {
  92     char*equal = strchr(name,'=');
  93     if (equal) {
  94         *equal = 0;
  95         equal++;
  96     }
  97     while(options->shortoption) {
  98         if(!strcmp(options->longoption, name)) {
  99                 char*tmp = (char*)malloc(strlen(options->shortoption)
 100                         +(equal?strlen(equal)+2:2));
 101                 strcpy(tmp, options->shortoption);
 102                 if(equal) {
 103                     //strcpy(&tmp[strlen(tmp)], equal);
 104                     int ret = args_callback_option(tmp, equal);
 105                     if(!ret) {
 106                         fprintf(stderr, "Warning: Option --%s takes no parameter.\n", name);
 107                     }
 108                     return 0;
 109                 }
 110                 return args_callback_option(tmp,val);
 111         }
 112         options++;
 113     }
 114     fprintf(stderr, "Unknown option: --%s\n", name);
 115     exit(1);
 116 }
 117
 118 #endif //__args_h__