1 /* Plural expression evaluation.
2 Copyright (C) 2000-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 static unsigned long int plural_eval (const struct expression *pexp,
23 static unsigned long int
26 const struct expression *pexp;
32 switch (pexp->operation)
45 /* pexp->operation must be lnot. */
46 unsigned long int arg = plural_eval (pexp->val.args[0], n);
51 unsigned long int leftarg = plural_eval (pexp->val.args[0], n);
52 if (pexp->operation == lor)
53 return leftarg || plural_eval (pexp->val.args[1], n);
54 else if (pexp->operation == land)
55 return leftarg && plural_eval (pexp->val.args[1], n);
58 unsigned long int rightarg = plural_eval (pexp->val.args[1], n);
60 switch (pexp->operation)
63 return leftarg * rightarg;
65 return leftarg / rightarg;
67 return leftarg % rightarg;
69 return leftarg + rightarg;
71 return leftarg - rightarg;
73 return leftarg < rightarg;
75 return leftarg > rightarg;
77 return leftarg <= rightarg;
78 case greater_or_equal:
79 return leftarg >= rightarg;
81 return leftarg == rightarg;
83 return leftarg != rightarg;
93 /* pexp->operation must be qmop. */
94 unsigned long int boolarg = plural_eval (pexp->val.args[0], n);
95 return plural_eval (pexp->val.args[boolarg ? 1 : 2], n);