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Added support for --help and -? options, which do the same as -h

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(This feature was requested by Raphael Wimmer).
This commit is contained in:
Thomas Jensen 2006-08-28 15:53:46 +00:00
parent d6b08f40b4
commit 92a5770124
1 changed files with 48 additions and 7 deletions
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55
src/boxes.c
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@ -2,7 +2,7 @@
* File: boxes.c
* Date created: March 18, 1999 (Thursday, 15:09h)
* Author: Copyright (C) 1999 Thomas Jensen <boxes@thomasjensen.com>
* Version: $Id: boxes.c,v 1.37 2006/07/12 05:49:50 tsjensen Exp tsjensen $
* Version: $Id: boxes.c,v 1.38 2006/07/22 19:40:40 tsjensen Exp tsjensen $
* Language: ANSI C
* Platforms: sunos5/sparc, for now
* World Wide Web: http://boxes.thomasjensen.com/
@ -44,6 +44,11 @@
* Revision History:
*
* $Log: boxes.c,v $
* Revision 1.38 2006/07/22 19:40:40 tsjensen
* Applied patch by Christoph Dreyer to support unexpansion of leading tabs
* Added ability to retain leading tabs in their original positions
* Mending a box with -m now implies -k false
*
* Revision 1.37 2006/07/12 05:49:50 tsjensen
* Updated email and web addresses in comment header etc.
* Applied patch by Elmar Loos that adds -m option for mending a box
@ -251,7 +256,7 @@ extern int optind, opterr, optopt; /* for getopt() */
static const char rcsid_boxes_c[] =
"$Id: boxes.c,v 1.37 2006/07/12 05:49:50 tsjensen Exp tsjensen $";
"$Id: boxes.c,v 1.38 2006/07/22 19:40:40 tsjensen Exp tsjensen $";
@ -310,6 +315,34 @@ static void usage (FILE *st)
static void usage_short (FILE *st)
/*
* Print abbreviated usage information on stream st.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
{
fprintf (st, "Usage: %s [options] [infile [outfile]]\n", PROJECT);
fprintf (st, "Try `%s -h' for more information.\n", PROJECT);
}
static void usage_long (FILE *st)
/*
* Print usage information on stream st, including a header text.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
{
fprintf (st, "%s - draws any kind of box around your text (and removes it)\n", PROJECT);
fprintf (st, " (c) Thomas Jensen <boxes@thomasjensen.com>\n");
fprintf (st, " Web page: http://boxes.thomasjensen.com/\n");
usage (st);
}
static int is_dir (const char *path)
/*
* Return true if file specified by path is a directory
@ -529,6 +562,16 @@ static int process_commandline (int argc, char *argv[])
opt.padding[idummy] = -1;
yyin = stdin;
/*
* Intercept '--help' and '-?' cases first, as they are not supported by getopt()
*/
if (argc >= 2 && argv[1] != NULL
&& (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0))
{
usage_long (stdout);
return 42;
}
/*
* Parse Command Line
*/
@ -672,10 +715,7 @@ static int process_commandline (int argc, char *argv[])
/*
* Display usage information and terminate
*/
printf ("%s - draws any kind of box around your text (and removes it)\n", PROJECT);
printf (" (c) Thomas Jensen <boxes@thomasjensen.com>\n");
printf (" Web page: http://boxes.thomasjensen.com/\n");
usage (stdout);
usage_long (stdout);
return 42;
case 'i':
@ -877,6 +917,7 @@ static int process_commandline (int argc, char *argv[])
/*
* Missing argument or illegal option - do nothing else
*/
usage_short (stderr);
return 1;
case EOF:
@ -906,7 +947,7 @@ static int process_commandline (int argc, char *argv[])
else if (argv[optind+1] && argv[optind+2]) { /* illegal third file */
fprintf (stderr, "%s: illegal parameter -- %s\n",
PROJECT, argv[optind+2]);
usage (stderr);
usage_short (stderr);
return 1;
}