/* File filedir.c
 * August 18, 2020
 * By Jessica Mink, Harvard-Smithsonian Center for Astrophysics
 * Send bug reports to jmink@cfa.harvard.edu

   Copyright (C) 2010 - 2020
   Smithsonian Astrophysical Observatory, Cambridge, MA USA

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

static int verbose = 0;         /* verbose/debugging flag */
static int replace = 0;         /* character replacement flag */
static int nonl = 0;         /* character replacement flag */
static char c1, c2;
static void usage();
static char *RevMsg = "FILEDIR WCSTools 3.9.7, 11 August 2022, Jessica Mink (jmink@cfa.harvard.edu)";

int
main (ac, av)
int ac;
char **av;
{
    char *fn;
    char *str;
    char *ext;
    int i, lroot, lfn;
    FILE *fd = NULL;
    char line[4096];
    int ReadStdin;

    /* crack arguments */
    for (av++; --ac > 0 && *(str = *av) == '-'; av++) {
        char c;
        while ((c = *++str))
        switch (c) {

        case 'v':       /* more verbosity */
            verbose++;
            break;

        case 'z':       /* drop newline from end of output for scripting */
            nonl++;
            break;

        default:
            usage();
            break;
        }
    }

    /* There are ac remaining file names starting at av[0] */
    if (ac == 0)
        usage ();
    ReadStdin = 0;

    while (ac-- > 0) {
	if (!ReadStdin) {
	    fn = *av++;
	    if (!strcmp (fn, "stdin")) {
		ReadStdin = 1;
		fd = stdin;
		}
	    }
	if (ReadStdin) {
	    if (fgets (line, 1023, fd) == NULL)
                break;
	    ac++;
	    lfn = strlen (line);
	    line[lfn-1] = (char) 0;
	    fn = line;
	    }
	lfn = strlen (fn);
	if (verbose)
    	    printf ("%s ( %d) -> ", fn, lfn);
	ext = strrchr (fn, '/');
	if (ext != NULL) {
	    *ext = (char) 0;
	    if (ext == (fn + lfn - 1)) {
		ext = strrchr (fn, '/');
		if  (ext != NULL)
		    *ext = (char) 0;
		else {
		    fn[0] = '.';
		    fn[1] = '/';
		    fn[2] = (char) 0;
		    }
		}
	    printf ("%s", fn);
	    }
	else
	    printf ("./");
	if (nonl)
	    printf ("%c",(char)0);
	else
	    printf ("\n");
	}

    return (0);
}

static void
usage ()
{
    fprintf (stderr, "%s\n", RevMsg);
    fprintf (stderr,"FILEDIR: Return directory part of file pathname\n");
    fprintf(stderr,"Usage: filedir [-v][-n]file1 file2 file3 ...\n");
    fprintf(stderr,"       -n: Drop newline for scripting\n");
    fprintf(stderr,"       -v: Print input as well as output\n");
    exit (1);
}
/* Jun 30 2000	New program
 *
 * Oct 02 2012	If pathname ends in "/", drop last directory
 *
 * Sep 22 2015	Read filepath from STDIN if filepath is "stdin"
 *
 * Aug 18 2020	Add -z option to drop newline for scripting
 */
