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/* grdcmp.c
Compare two grades.
Copyright (C) 1992 Ian Lance Taylor
This file is part of the Taylor UUCP uuconf library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
*/
#include "uucnfi.h"
#if USE_RCS_ID
const char _uuconf_grdcmp_rcsid[] = "$Id: grdcmp.c,v 1.5 1995/06/21 19:22:39 ian Rel $";
#endif
#include <ctype.h>
/* Compare two grades, returning < 0 if b1 should be executed before
b2, == 0 if they are the same, or > 0 if b1 should be executed
after b2. This can not fail, and does not return a standard uuconf
error code.
This implementation assumes that the upper case letters are in
sequence, and that the lower case letters are in sequence. */
int
uuconf_grade_cmp (barg1, barg2)
int barg1;
int barg2;
{
int b1, b2;
/* Make sure the arguments are unsigned. */
b1 = (int) BUCHAR (barg1);
b2 = (int) BUCHAR (barg2);
if (isdigit (b1))
{
if (isdigit (b2))
return b1 - b2;
else
return -1;
}
else if (isupper (b1))
{
if (isdigit (b2))
return 1;
else if (isupper (b2))
return b1 - b2;
else
return -1;
}
else
{
if (! islower (b2))
return 1;
else
return b1 - b2;
}
}
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