77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* grdcmp.c
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Compare two grades.
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Copyright (C) 1992 Ian Lance Taylor
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This file is part of the Taylor UUCP uuconf library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License
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as published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Infinity Development Systems, P.O. Box 520, Waltham, MA 02254.
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*/
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#include "uucnfi.h"
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#if USE_RCS_ID
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const char _uuconf_grdcmp_rcsid[] = "$Id: grdcmp.c,v 1.1 1993/08/04 19:34:14 jtc Exp $";
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#endif
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#include <ctype.h>
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/* Compare two grades, returning < 0 if b1 should be executed before
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b2, == 0 if they are the same, or > 0 if b1 should be executed
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after b2. This can not fail, and does not return a standard uuconf
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error code.
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This implementation assumes that the upper case letters are in
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sequence, and that the lower case letters are in sequence. */
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int
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uuconf_grade_cmp (barg1, barg2)
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int barg1;
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int barg2;
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{
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int b1, b2;
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/* Make sure the arguments are unsigned. */
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b1 = (int) BUCHAR (barg1);
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b2 = (int) BUCHAR (barg2);
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if (isdigit (b1))
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{
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if (isdigit (b2))
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return b1 - b2;
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else
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return -1;
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}
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else if (isupper (b1))
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{
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if (isdigit (b2))
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return 1;
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else if (isupper (b2))
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return b1 - b2;
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else
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return -1;
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}
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else
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{
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if (! islower (b2))
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return 1;
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else
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return b1 - b2;
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}
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}
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