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/* msd_dir.c - portable directory routines
Copyright (C) 1990 by Thorsten Ohl, td12@ddagsi3.bitnet
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 1, 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. */
/* Everything non trivial in this code is from: @(#)msd_dir.c 1.4
87/11/06. A public domain implementation of BSD directory routines
for MS-DOS. Written by Michael Rendell ({uunet,utai}michael@garfield),
August 1897 */
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dos.h>
#include <ndir.h>
static void free_dircontents (struct _dircontents *);
/* find ALL files! */
#define ATTRIBUTES (_A_RDONLY | _A_HIDDEN | _A_SYSTEM | _A_SUBDIR)
DIR *
opendir (const char *name)
{
struct _finddata_t find_buf;
DIR *dirp;
struct _dircontents *dp;
char name_buf[_MAX_PATH + 1];
char *slash = "";
long hFile;
if (!name)
name = "";
else if (*name)
{
const char *s;
int l = strlen (name);
s = name + l - 1;
if ( !(l == 2 && *s == ':') && *s != '\\' && *s != '/')
slash = "/"; /* save to insert slash between path and "*.*" */
}
strcat (strcat (strcpy (name_buf, name), slash), "*.*");
dirp = (DIR *) malloc (sizeof (DIR));
if (dirp == (DIR *)0)
return (DIR *)0;
dirp->dd_loc = 0;
dirp->dd_contents = dirp->dd_cp = (struct _dircontents *) 0;
if ((hFile = _findfirst (name_buf, &find_buf)) < 0)
{
free (dirp);
return (DIR *)0;
}
do
{
dp = (struct _dircontents *) malloc (sizeof (struct _dircontents));
if (dp == (struct _dircontents *)0)
{
free_dircontents (dirp->dd_contents);
return (DIR *)0;
}
dp->_d_entry = malloc (strlen (find_buf.name) + 1);
if (dp->_d_entry == (char *)0)
{
free (dp);
free_dircontents (dirp->dd_contents);
return (DIR *)0;
}
if (dirp->dd_contents)
dirp->dd_cp = dirp->dd_cp->_d_next = dp;
else
dirp->dd_contents = dirp->dd_cp = dp;
strcpy (dp->_d_entry, find_buf.name);
dp->_d_next = (struct _dircontents *)0;
} while (!_findnext (hFile, &find_buf));
dirp->dd_cp = dirp->dd_contents;
_findclose(hFile);
return dirp;
}
void
closedir (DIR *dirp)
{
free_dircontents (dirp->dd_contents);
free ((char *) dirp);
}
struct direct *
readdir (DIR *dirp)
{
static struct direct dp;
if (dirp->dd_cp == (struct _dircontents *)0)
return (struct direct *)0;
dp.d_namlen = dp.d_reclen =
strlen (strcpy (dp.d_name, dirp->dd_cp->_d_entry));
#if 0 /* JB */
strlwr (dp.d_name); /* JF */
#endif
dp.d_ino = 0;
dirp->dd_cp = dirp->dd_cp->_d_next;
dirp->dd_loc++;
return &dp;
}
void
seekdir (DIR *dirp, long off)
{
long i = off;
struct _dircontents *dp;
if (off < 0)
return;
for (dp = dirp->dd_contents; --i >= 0 && dp; dp = dp->_d_next)
;
dirp->dd_loc = off - (i + 1);
dirp->dd_cp = dp;
}
long
telldir (DIR *dirp)
{
return dirp->dd_loc;
}
/* Garbage collection */
static void
free_dircontents (struct _dircontents *dp)
{
struct _dircontents *odp;
while (dp)
{
if (dp->_d_entry)
free (dp->_d_entry);
dp = (odp = dp)->_d_next;
free (odp);
}
}
#ifdef TEST
void main (int argc, char *argv[]);
void
main (int argc, char *argv[])
{
static DIR *directory;
struct direct *entry = (struct direct *)0;
char *name = "";
if (argc > 1)
name = argv[1];
directory = opendir (name);
if (!directory)
{
fprintf (stderr, "can't open directory `%s'.\n", name);
exit (2);
}
while (entry = readdir (directory))
printf ("> %s\n", entry->d_name);
printf ("done.\n");
}
#endif /* TEST */
/*
* Local Variables:
* mode:C
* ChangeLog:ChangeLog
* compile-command:make
* End:
*/
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