dm@bloom-beacon.mit.edu@think (Dave Mankins) (05/22/91)
Submitted-by: Dave Mankins <dm@think.com>
Posting-number: Volume 20, Issue 5
Archive-name: getopt.h/part01
Yet another getopt ...
Below is a macro package I wrote the second time I had to refer to the
getopt(3) man page to remind myself how getopt() is used. I think this
simplifies the use of getopt tremendously.
Stick it into getopt.h in your personal toolkit.
david mankins (dm@think.com)
----
#! /bin/sh
# This is a shell archive. Remove anything before this line, then feed it
# into a shell via "sh file" or similar. To overwrite existing files,
# type "sh file -c".
# The tool that generated this appeared in the comp.sources.unix newsgroup;
# send mail to comp-sources-unix@uunet.uu.net if you want that tool.
# Contents: getopt.h
# Wrapped by kent@sparky on Tue May 21 22:31:30 1991
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
echo If this archive is complete, you will see the following message:
echo ' "shar: End of archive."'
if test -f 'getopt.h' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'getopt.h'\"
else
echo shar: Extracting \"'getopt.h'\" \(1222 characters\)
sed "s/^X//" >'getopt.h' <<'END_OF_FILE'
X#ifndef GETOPT
X/*****************************************************************************
X *
X * GETOPT, USES_GETOPT
X *
X * Usage:
X * GETOPT(c, str) {
X * case 'a':
X * code for option a...
X * case 'b':
X * code for option b...
X * case '?':
X * code for unknown option...
X * }
X * GETOPT_LOOP_REST(strp) {
X * loop over the remaining arguments (typically file names), that
X * is, the ones at the end of the line that aren't prefixed with
X * hyphens...
X * }
X *
X * requires that argc, and argv have their usual names (and are in the
X * same scope as the use of GETOPT).
X *
X * Expects a USES_GETOPT within the same scope to declare the getopt
X * variables.
X *
X *****************************************************************************/
X#define USES_GETOPT extern char *optarg; extern int optind, opterr
X#define GETOPT(c, str) while((c=getopt(argc, argv, str)) != -1) switch(c)
X
X/*
X * Loop over the REST of the arguments
X *
X * (this has got to be one of the more egregious uses of the ternary ?: ---
X * however, you only have to understand it once.)
X */
X#define GETOPT_LOOP_REST(argp) \
X while((optind < argc)? (argp = argv[optind++]): (argp = NULL))
X
X#endif /* GETOPT */
END_OF_FILE
if test 1222 -ne `wc -c <'getopt.h'`; then
echo shar: \"'getopt.h'\" unpacked with wrong size!
fi
# end of 'getopt.h'
fi
echo shar: End of archive.
exit 0
exit 0 # Just in case...
--
Kent Landfield INTERNET: kent@sparky.IMD.Sterling.COM
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