ggo.c

   1 /*
   2  * Copyright (C) 2008-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file ggo.c Function for printing help. */
   8
   9
  10 #include "para.h"
  11 #include "ggo.h"
  12
  13 /**
  14  * Wrapper for printf() that exits on errors.
  15  *
  16  * \param fmt Usual format string.
  17  */
  18 __printf_1_2 void printf_or_die(const char *fmt, ...)
  19 {
  20         va_list argp;
  21         int ret;
  22
  23         va_start(argp, fmt);
  24         ret = vprintf(fmt, argp);
  25         va_end(argp);
  26         if (ret >= 0)
  27                 return;
  28         exit(EXIT_FAILURE);
  29 }
  30
  31 /**
  32  * Print one of the two given help texts.
  33  *
  34  * \param help contains the help texts.
  35  * \param detailed_help Whether to print the detailed help text.
  36  */
  37 void ggo_print_help(struct ggo_help *help, int detailed_help)
  38 {
  39         const char **p;
  40
  41         if (!help)
  42                 return;
  43         if (detailed_help)
  44                 p = help->detailed_help;
  45         else
  46                 p = help->short_help;
  47         if (!p)
  48                 return;
  49         p += 3; /* skip -h and -V */
  50         for (; *p; p++)
  51                 printf_or_die("\t%s\n", *p);
  52 }