wmframepic/src/arg_parser.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include "arg_parser.h"
   4
   5
   6
   7 int get_values_from_command_line(int argc, char **argv,
   8                 char *my_name,
   9                 char **my_file,
  10                 int *my_day,
  11                 int *my_month,
  12                 int *my_year) {
  13
  14         struct arg_str  *name           = arg_str1("n", "name", "<string>", "the name of the person");
  15         struct arg_file  *xpm_file      = arg_file1("f", "xpm_file", "<file>", "the xpm file path");
  16         struct arg_int  *day            = arg_int1("d", "day", "int", "the day of birth");
  17         struct arg_int  *month          = arg_int1("m", "month", "int", "the month of birth");
  18         struct arg_int  *year           = arg_int1("y", "year", "int", "the year of birth");
  19         struct arg_lit  *version        = arg_lit0("v", "version", "print the version and exit");
  20     struct arg_lit  *help       = arg_lit0(NULL, "help", "print this help and exit");
  21     struct arg_end  *end        = arg_end(20);
  22     void* argtable[] = {name, xpm_file, day, month, year, help, version, end};
  23     const char* progname = "wmframepic";
  24     int nerrors;
  25     int exitcode = COMMAND_LINE_SUCCESS;
  26     int i;
  27
  28     /* verify the argtable[] entries were allocated sucessfully */
  29     if (arg_nullcheck(argtable) != 0) {
  30                 /* NULL entries were detected, some allocations must have failed */
  31                 printf("%s: insufficient memory\n", progname);
  32                 exitcode = COMMAND_LINE_FAIL;
  33                 goto exit;
  34         }
  35
  36     /* Parse the command line as defined by argtable[] */
  37     nerrors = arg_parse(argc,argv,argtable);
  38
  39     /* special case: '--help' takes precedence over error reporting */
  40     if (help->count > 0) {
  41                 printf(
  42 "This is a dockapp written for Window Maker and any other window manager\n\
  43 that suports the dock (or slit), like the Window Maker itself, Fluxbox, \n\
  44 Blackbox and others.\n\n");
  45                 printf(
  46 "It's meant to show the picture of your kid (or any beloved one) on your\n\
  47 screen and when pressed, it will show how old he/she is. Pretty silly but\n\
  48 I'm sure you will enjoy!\n\n");
  49
  50                 printf("Usage: %s", progname);
  51                 arg_print_syntax(stdout, argtable, "\n");
  52
  53                 arg_print_glossary(stdout, argtable, "  %-25s %s\n");
  54                 exitcode = COMMAND_LINE_HELP;
  55                 goto exit;
  56         }
  57
  58     if (version->count > 0) {
  59             printf("%s\n", PACKAGE_STRING);
  60             exitcode = COMMAND_LINE_HELP;
  61             goto exit;
  62     }
  63
  64     /* If the parser returned any errors then display them and exit */
  65     if (nerrors > 0) {
  66                 /* Display the error details contained in the arg_end struct.*/
  67                 arg_print_errors(stdout, end, progname);
  68                 printf("Try '%s --help' for more information.\n", progname);
  69                 exitcode = COMMAND_LINE_FAIL;
  70                 goto exit;
  71         }
  72
  73     /* only get here is command line arguments were parsed sucessfully */
  74
  75     strncpy(my_name, *name->sval, 9);
  76     *my_file = malloc(strlen(xpm_file->filename[0]) * sizeof(char) + 1);
  77     strcpy(*my_file, xpm_file->filename[0]);
  78     my_name[9] = '\0';
  79     *my_day = *day->ival;
  80     *my_month = *month->ival;
  81     *my_year = *year->ival;
  82
  83     exit:
  84     /* deallocate each non-null entry in argtable[] */
  85     arg_freetable(argtable,sizeof(argtable)/sizeof(argtable[0]));
  86
  87     return exitcode;
  88 }