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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <stdio.h>
#include <ctype.h>
#define import_spp
#define import_kernel
#define import_knames
#include <iraf.h>
/* ZFXDIR -- Extract OS directory prefix from OSFN. The null string is
* returned if there is no directory prefix. The status value is the number
* of characters in the output string.
*/
int
ZFXDIR (
XCHAR *osfn, /* OS filename [NOT PACKED] */
XCHAR *osdir, /* receives osdir [NOT PACKED] */
XINT *maxch,
XINT *nchars
)
{
register XCHAR *ip, *op;
register int n = *maxch;
XCHAR *last_slash;
for (ip=osfn; *ip == ' '; ip++)
;
/* A UNIX pathname must begin with a / (anything else is considered an
* IRAF pathname). The OSDIR part includes everything up to the
* rightmost /. A string of the form "/name" has the directory prefix
* "/", i.e. "name" is considered a filename not a subdirectory name.
*/
last_slash = NULL;
op = osdir;
if (*ip == '/')
for (; --n >= 0 && (*op = *ip++); op++)
if (*op == '/')
last_slash = op;
if (last_slash != NULL)
op = last_slash + 1;
*op = XEOS;
*nchars = op - osdir;
return (XOK);
}
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